Techniques are described for low-noise self-capacitor sensing in a capacitive touch panel array integrated with a display panel. Each channel of the array has a self-capacitance (Ci) that changes responsive to presence or absence of a local touch event local. Each channel is read by an analog front-end (AFE) by using a locally noise-suppressed discharge current for a discrete discharge time to discharge Ci to obtain a discharge voltage level that differs with presence or absence of the local touch event, and outputting a voltage output for the channel based on the discharge voltage level by passively mixing at least the discharge voltage level to produce a pair of up-converted channel signals, sampling the pair of up-converted channel signals to obtain a differential voltage sample, and amplifying the differential voltage sample to generate the Vout as indicating absence or presence of the touch event local to the channel.
Techniques are described for using a multi-branch AC-mode bridge approach with global current rotation for self-capacitor sensing in a capacitive touch panel, such as integrated into a display of a touchscreen electronic device. K channels are coupled with K branches of a multi-branch AC-mode bridge to form K−1 pairs of channels for concurrent differential readout. K nominally identical sinusoidal input currents are generated based on an error signal, which is generated based on comparing a sinusoidal driver signal with feedback from one or more of the K branches. A unit current rotator rotates the K sinusoidal input currents to each of the branches, so that each branch current is formed by a rotating contribution from each of the sinusoidal input currents. Driving each branch with its branch current manifests a respective branch voltage, and differences between the branch voltages can be used to differentially sense pairs of channels.
An active noise cancellation method and active noise cancellation earphones are provided, which may improve a noise cancellation effect of the active noise cancellation earphones. The method includes: determining a first primary path transfer function according to a first out-of-ear data collected by the out-of-ear microphone and a first in-ear data collected by the in-ear microphone when the speaker plays audio data; determining audio data received by the in-ear microphone according to the first in-ear data, the first out-of-ear data and the first primary path transfer function; determining a first secondary path transfer function according to the audio data played through the speaker and the audio data received by the in-ear microphone; and updating an operation coefficient of the filter to a first operation coefficient according to the first primary path transfer function and/or the first secondary path transfer function.
G10K 11/178 - Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
A class D amplifier is provided, including: a first comparator, configured to generate a first comparison result based on a positive end input signal and a triangular wave; a second comparator, configured to generate a second comparison result based on a negative end input signal and the triangular wave; an exclusive OR gate, configured to generate a first control signal based on the first comparison result and the second comparison result; a first AND gate, configured to generate a positive end PMW output based on the first comparison result and the first control signal; and a second AND gate, configured to generate a negative end PMW output based on the second comparison result and the first control signal; and an output stage, configured to generate the positive end output signal and the negative end output signal correspondingly based on the positive end PMW output and the negative end PMW output.
H03K 5/22 - Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
H03K 19/21 - EXCLUSIVE-OR circuits, i.e. giving output if input signal exists at only one input; COINCIDENCE circuits, i.e. giving output only if all input signals are identical
5.
OPERATIONAL AMPLIFIER-BASED HYSTERESIS COMPARATOR AND CHIP
An operational amplifier-based hysteresis comparator and a chip are provided. The hysteresis comparator includes: an input stage and an amplification stage. The input stage includes: a first input branch and a second input branch, where the first input branch generates a first current based on the first voltage, and the second input branch generates a second current based on the second voltage. The first current is connected with a first input terminal of the amplification stage, and the second current is connected with a second input terminal of the amplification stage. An output terminal of the amplification stage outputs a first level when the first current is greater than the second current, and outputs a second level when the first current is less than the second current. The present disclosure changes the hysteresis voltage generation mode, thereby reducing the instability caused by positive feedback.
H03K 5/24 - Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being amplitude
6.
ULTRASONIC FINGERPRINT APPARATUS AND ELECTRONIC DEVICE
An ultrasonic fingerprint apparatus and an electronic device are provided. The ultrasonic fingerprint apparatus is disposed under a display of an electronic device to implement under-display ultrasonic fingerprint recognition. The ultrasonic fingerprint apparatus includes an ultrasonic fingerprint chip and a piezoelectric transducer disposed on the ultrasonic fingerprint chip. The piezoelectric transducer includes a piezoelectric layer, an upper electrode on the piezoelectric layer, and a lower electrode under the piezoelectric layer. The ultrasonic fingerprint chip is a CMOS chip. The upper electrode is led out to a surface of the CMOS chip, and is connected to one end of a lead via a pad on the surface of the COMS chip, and the other end of the lead is connected to a circuit board under the ultrasonic fingerprint chip, to implement an electrical connection between the piezoelectric transducer and the circuit board.
Embodiments of the present disclosure provide a method for capturing a fingerprint image, an apparatus for capturing a fingerprint image, and an electronic device, where the method includes: controlling a fingerprint sensor to capture at least one frame of image based on each candidate exposure time among N candidate exposure times respectively; determining N values of a feature parameter corresponding to the N candidate exposure times according to the at least one frame of image captured in each exposure time, where the feature parameter is used to indicate a degree of influence of a refresh period of a display screen on the fingerprint image captured by the fingerprint sensor; determining a candidate exposure time corresponding to a first value indicating a smallest degree of influence among the N values as a target exposure time; and controlling the fingerprint sensor to capture the fingerprint image based on the target exposure time.
A clock calibration method and an electronic device, for calibrating a clock of a fingerprint chip, which can improve an accuracy of the clock of the fingerprint chip, thereby improving performance of the fingerprint chip. The clock calibration method, for calibrating a clock of a fingerprint chip provided in an electronic device, includes: sending a configuration command to the fingerprint chip to cause the fingerprint chip to map a current clock of the fingerprint chip to a target pin of the fingerprint chip; detecting the target pin to acquire the current clock of the fingerprint chip; determining a calibration value based on a target clock and the current clock of the fingerprint chip; and sending the calibration value to a calibration register in the fingerprint chip, the calibration value being used to adjust the current clock of the fingerprint chip.
Techniques are described for discrete-time self-capacitor sensing in a touch panel. The self-capacitor manifests a detectably different capacitance based on presence or absence of a local touch event on the touch panel. In a first time phase, embodiments charge a self-capacitor and initialize a ramp bias generator. In a second time phase, embodiments discharge the self-capacitor with a ramp-controlled current source that is biased by the ramp bias generator to produce a discharge current that transitions from high at the beginning of the second time phase to low at the end of the second time phase. By the end of the second phase, the remaining charge in the self-capacitor depends on presence or absence of a local touch event. Some embodiments convert the remaining charge to an amplified sense output for readout.
Techniques are described herein for phase modulation and interpolation that support high phase modulation resolution with high linearity. Embodiments receive a digital signal that uses a sequence of K-bit digital codes to encode a sequence of instantaneous phases for phase-modulating a local oscillator signal. A fractional divider divides a reference clock into N divided clock signals at equally spaced phase intervals and selects a pair of such signals based on first designated bits of the digital code. A fractional divider-calibrated delay line generates M delayed clock signals at equally spaced phase intervals between the selected pair of divided clock signals, and selects a pair of the delayed clock signals based on second designated bits of the digital code. A digital controlled edge interpolator generates a delayed local oscillator output signal by interpolating between the selected pair of delayed clock signals based on third designated bits of the digital code.
An ultrasonic fingerprint detection device and an electronic device are provided, which can reduce the size, circuit complexity and cost of the ultrasonic fingerprint detection device. The ultrasonic fingerprint detection device includes: a signal generation circuit and an ultrasonic fingerprint sensor chip, where the signal generation circuit is composed of discrete devices and the signal generation circuit includes: a control circuit and a resonant circuit, the control circuit is configured to receive a control signal provided by the ultrasonic fingerprint sensor chip and generate an excitation signal under the action of the control signal, and the resonant circuit is configured to receive the excitation signal and form a drive signal under the action of the excitation signal; and the ultrasonic fingerprint sensor chip is configured to receive the drive signal, and generate an ultrasonic signal for fingerprint detection under the action of the drive signal.
Techniques are described for using an alternating-current-mode (AC-mode) bridge for low-noise self-capacitor sensing in a capacitive touch panel array integrated with a display panel. Each channel of the array has a self-capacitance (Ci) that changes responsive to presence or absence of a local touch event local. Pairs of channels are read out differentially by coupling pairs of channels to branches of an AC-mode bridge. The AC-mode bridge includes current sources that drive each branch (and thereby each channel) with a sinusoidal current, manifesting a branch voltage on each branch based on the self-capacitance of the branch. The branch voltages are used to generate an output voltage. The sinusoidal current is controlled by comparing a driver signal with feedback from the branches, so that common-mode noise on the channels becomes a common-mode component of the sinusoidal currents and is rejected in the generation of the output voltage.
G06F 3/045 - Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
G06F 3/044 - Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
G06F 3/041 - Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
13.
METHOD AND IMAGE PROCESSOR UNIT FOR PROCESSING IMAGE DATA OF AN IMAGE SENSOR
A method for processing of image data is described, wherein an image comprises a matrix of pixels. The method includes:
determining differences between a pixel value of a current pixel and a pixel value of a respective adjacent pixel in a number of gradient directions; and
encoding the current pixel by replacing the current pixel by the gradient direction having the minimum gradient difference for the current pixel.
A method for processing of image data is described, wherein an image comprises a matrix of pixels. The method includes:
determining differences between a pixel value of a current pixel and a pixel value of a respective adjacent pixel in a number of gradient directions; and
encoding the current pixel by replacing the current pixel by the gradient direction having the minimum gradient difference for the current pixel.
Thus, the gradient direction is explicitly encoded into the output image data stream.
H04N 19/137 - Motion inside a coding unit, e.g. average field, frame or block difference
H04N 19/182 - Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a pixel
H04N 19/46 - Embedding additional information in the video signal during the compression process
14.
METHOD FOR PROCESSING IMAGE DATA OF AN IMAGE SENSOR AND IMAGE PROCESSOR UNIT AND COMPUTER PROGRAM
The invention discloses a method for processing image data of an image sensor, said image sensor comprises a sensor area of a pixel matrix providing image pixel data, wherein the pixel matrix comprises phase detection pixels at pre-defined locations, and wherein a set of image pixel data comprises phase detection information of said phase detection pixels, and wherein a step of calculating image pixel data for the pre-defined locations of the phase detection pixels as a function with either symmetric or asymmetric positioning of the respective phase detection in the colour channel is performed.
Techniques are described for non-invasive, dual-altitude-based measurement of blood pressure of a user using a portable electronic device having a sensor head. Illumination is projected into a body part and received by photodetectors. A changing amount of illumination received by the photodetectors changes corresponds to a changing amount of blood volume in elastic circulatory system pathways in the body part. Measurements of the received illumination are obtained at multiple altitudes relative to the user's heart. A linear fit is applied to the multiple measurements based on at least a predetermined slope-calibration factor to obtain a slope-corrected mean blood pressure measurement (BPM). Some embodiments use similar techniques to further measure pulse-to-mean (PTM) at multiple altitudes. The PTM measurements are used to simulate a systolic and/or diastolic BPM.
The present application discloses an ultrasonic image sensor and a related electronic device. The ultrasonic image sensor is coupled to a sinusoidal pulse signal generating circuit. The ultrasonic image sensor and the sinusoidal pulse signal generating circuit are provided below a cover plate. The ultrasonic image sensor is used to sense a surface pattern of an object to be measured that makes contact with the cover plate from above the cover plate. The ultrasonic image sensor includes: an upper electrode; a lower electrode array; a piezoelectric layer, which is provided between the upper electrode and the lower electrode array, wherein the piezoelectric layer is excited by means of a sinusoidal pulse signal generated by the sinusoidal pulse signal generating circuit so as to generate an ultrasonic wave, the ultrasonic wave is transmitted along the cover plate to the object to be measured and then a reflected echo is generated.
An ultrasonic transceiver system and an electronic device. The ultrasonic transceiver system includes a signal generating circuit and an ultrasonic sensor chip. The signal generating circuit is composed of discrete devices and includes a pulse generating circuit and a resonance circuit. The pulse generating circuit receives a control signal output by the ultrasonic sensor chip, and generates, according to the control signal, a first pulse voltage signal and a second pulse voltage signal which are in opposite phase to each other, and the resonant circuit receives the first pulse voltage signal and the second pulse voltage signal which are in opposite phase to each other and generates a drive signal under action of the first pulse voltage signal and the second pulse voltage signal. The ultrasonic sensor chip receives the drive signal and generates an ultrasonic signal according to the drive signal.
B06B 1/02 - Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency making use of electrical energy
B06B 1/06 - Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
18.
DETECTION CIRCUIT AND RELATED ELECTRONIC APPARATUS
Disclosed in the present application are a detection circuit and a related electronic apparatus. A detection circuit is used for determining the amplitude of a received signal that is generated by a receiver after same receives an input signal, and includes an operational amplifier; a capacitor unit, which is coupled between an output end and a negative end of the operational amplifier; a reset switch, which is arranged in parallel with the capacitor unit; a first switch, which is coupled between a reference voltage and an output end of the receiver; and a second switch, which is coupled between the output end of the receiver and the negative end of the operational amplifier, wherein in a general stage, the received signal includes a plurality of waves with a period T.
The present application provides a touch driving circuit, a driving chip and a touch display device. The touch driving circuit is configured to output a driving signal to drive a touch electrode of the touch display device; and the touch driving circuit includes: a power supply voltage generation circuit, a switching circuit and a first energy storage capacitor, where a first input end of the switching circuit is connected to the power supply voltage generation circuit; a second input end of the switching circuit is connected to a ground terminal GND through the first energy storage capacitor; a third input end of the switching circuit is connected to the ground terminal GND; an output end of the switching circuit is connected to the touch electrode; the power supply voltage generation circuit is configured to generate a first positive voltage; the switching circuit is configured to control the touch electrode to be connected to the power supply voltage generation circuit during a first period of time, and control the touch electrode to be connected to the first energy storage capacitor during a second period of time, and control the touch electrode to be connected to the ground terminal GND during a third period of time. The touch driving circuit has lower driving power consumption.
A touchpad includes a touch assembly and a support assembly. The touch assembly is disposed on the support assembly. The support assembly includes: a main support component, disposed at an edge of a bottom surface of the touch assembly; a fixed platform, on which a boss is integrally formed; and first and second elastic components, where the first and second elastic components are symmetrically connected to the main support component along a plane in which the main support component is located, an opening for accommodating the fixed platform is formed between the first and second elastic components, the fixed platform is connected between the first and second elastic components, and the support assembly has a sheet-like structure; and a travel switch is disposed on the bottom surface of the touch assembly, and the boss is configured to touch and trigger the travel switch when the touch assembly is pressed.
G06F 3/0354 - Pointing devices displaced or positioned by the user; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
G06F 1/16 - Constructional details or arrangements
21.
METHOD FOR DETECTING LIGHT LEAKAGE OF SCREEN, METHOD FOR DETECTING AMBIENT LIGHT, AND APPARATUS FOR DETECTING AMBIENT LIGHT
The present disclosure provides a method for detecting light leakage of a screen, a method for detecting ambient light, and an apparatus for detecting ambient light. The method for detecting light leakage of a screen includes: acquiring display parameters of a screen, the display parameters including: a brightness value of the screen and grayscale values of respective pixel points within a preset display region of the screen; inputting the display parameters into a pre-trained neural network model, to process the display parameters using the neural network model, to obtain light leakage values corresponding to the respective pixel points; and obtaining a light leakage value of the screen based on the light leakage values corresponding to the respective pixel points. Based on the above technical solutions, the light leakage value of the screen can be accurately and reliably determined.
Embodiments of the present disclosure provide a method for detecting light leakage of a screen, a method for detecting ambient light, and an apparatus for detecting ambient light. The method for detecting light leakage of a screen includes: acquiring a brightness value of the screen and grayscale values of pixel points within a preset display region of the screen; clustering the pixel points based on a plurality of preset grayscale value intervals and the grayscale values of the pixel points, to obtain a plurality of pixel point sets; obtaining light leakage values corresponding to the pixel point sets based on the brightness value and fused grayscale values corresponding to the pixel point sets; and obtaining a light leakage value of the screen based on the light leakage values corresponding to the pixel point sets.
G09G 3/34 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source
G01J 1/42 - Photometry, e.g. photographic exposure meter using electric radiation detectors
23.
METHOD FOR DETECTING INTENSITY OF AMBIENT LIGHT, AND ELECTRONIC DEVICE
An electronic device and a method for detecting an intensity of ambient light are provided. The method includes: sensing a light intensity of incident light, wherein the incident light includes ambient light passed through the display screen and light leaked from the display screen; obtaining an estimated light intensity of the light leaked from the display screen based on display data of a target region of the display screen; computing based on the estimated light intensity and a temperature compensation coefficient corresponding to a current temperature of the display screen, to obtain a light intensity of the light leaked from the display screen; and obtaining a light intensity of the ambient light passed through the display screen based on the light intensity of the incident light and the light intensity of the light leaked from the display screen.
G09G 3/20 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix
24.
Touch pad, force touch apparatus, and electronic device
A touch pad including a touch sensor, a force sensor, a printed circuit board, and a touch controller is provided. The touch sensor includes first and second touch electrode layers, and a first substrate. The first touch electrode layer is arranged above the second touch electrode layer through the first substrate. The force sensor is arranged below the touch sensor, and includes a support structure and at least one pressure electrode layer. The support structure is a deformable structure, and is configured to deform under the action of a pressure applied by a finger when pressing the touch pad to change a pressure sensing capacitance of a finger pressing region, and output a corresponding pressure sensing signal through the at least one pressure electrode layer. The printed circuit board is arranged below the force sensor. The touch controller is mounted and fixed to the printed circuit board.
Binnable time-of-flight (ToF) pixels are described, such as for integration with image sensor pixels. Each binnable ToF pixel includes a central dump gate and sub-pixels that are nominally mirror-symmetric and identical around the dump gate. Each sub-pixel includes a photodiode region (or a respective portion of a photodiode region), a storage gate, a storage region, a transfer gate, and a floating diffusion (FD) region. In an array, the binnable ToF pixels are arranged to share FD regions with other binnable ToF pixels of the array. In an un-binned mode, each sub-pixel can integrate photocharge in its storage region until it is time for readout, at which time the photocharges can be transferred to its respective floating diffusion region for individualized readout. In a binned mode, sub-pixels can integrate photocharge directly in their FD regions, which facilitates charge binning of integrated photocharge from all sub-pixels sharing the same FD region.
H04N 25/59 - Control of the dynamic range by controlling the amount of charge storable in the pixel, e.g. modification of the charge conversion ratio of the floating node capacitance
H04N 25/75 - Circuitry for providing, modifying or processing image signals from the pixel array
H04N 25/76 - Addressed sensors, e.g. MOS or CMOS sensors
H04N 25/702 - SSIS architectures characterised by non-identical, non-equidistant or non-planar pixel layout
H04N 25/46 - Extracting pixel data from image sensors by controlling scanning circuits, e.g. by modifying the number of pixels sampled or to be sampled by combining or binning pixels
H04N 25/705 - Pixels for depth measurement, e.g. RGBZ
H04N 23/667 - Camera operation mode switching, e.g. between still and video, sport and normal or high and low resolution modes
Embodiments and methods perform ear cavity frequency response (EFCR) adaptive noise cancelation (ANC) with path-compensation over an entire main path to the eardrum (MPED) of a user. A number of ANC filter models are pre-trained to include respective anti-noise path (ANP) filter models and respective MPED filter models representing ANC filter configurations. As a user wears a headphone earpiece, characteristics of the wearer and the position/orientation of wearing manifest a wearer/wearing condition. Techniques described herein can continuously or periodically and efficiently determine which of the pre-trained ANC filter models most closely described the present MPED of the present wearer/wearing condition, and can continuously or periodically update the ANC filter configuration based on the pre-trained models to maintain high-performance ANC that includes EFCR path-compensation.
G10K 11/178 - Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
A touchpad module, comprising: a moving part, a fixing part and a deforming part. The moving part has a touch panel, a main support member and a travel switch arranged on a bottom surface of the touch panel. The fixing part has a fixing platform, and a contact point is provided on a surface of the fixing platform close to the moving part. The deforming part is configured to elastically deform, when the touch panel is pressed, so that the moving part moves toward the fixing part along a pressing direction, and the contact point contacts and triggers the travel switch. The touchpad module provided by the present disclosure can realize a full-area pressing of the touchpad module.
G06F 3/0354 - Pointing devices displaced or positioned by the user; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
G06F 3/01 - Input arrangements or combined input and output arrangements for interaction between user and computer
28.
OSCILLATOR ACCELERATION CIRCUIT, CHIP AND ELECTRONIC DEVICE
An oscillator acceleration circuit, configured to accelerate the start-up of an oscillator, wherein the oscillator has an input terminal and an output terminal. The oscillator acceleration circuit includes an inverting amplifier, a feedback resistor and an acceleration circuit; the inverting amplifier has an input terminal and an output terminal correspondingly coupled to the input terminal and the output terminal of the oscillator. The feedback resistor is coupled between the input terminal and the output terminal of the oscillator, and the acceleration circuit is coupled between the input terminal and the output terminal of the oscillator. The acceleration circuit is configured to provide a transfer function, wherein the transfer function is the same as the transfer function provided by a resistor and a capacitor connected in parallel; wherein the resistance of the resistor is less than zero.
H03B 5/06 - Modifications of generator to ensure starting of oscillations
H03B 5/24 - Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator active element in amplifier being semiconductor device
H03B 5/12 - Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
29.
METHOD FOR MEASURING INTENSITY OF AMBIENT LIGHT AT ELECTRONIC DEVICE, ELECTRONIC DEVICE, AND CHIP
A method for measuring an intensity of ambient light at an electronic device, and a electronic device and a chip are provided. The electronic device includes a screen, and the screen is configured to be deemed at a dimming frequency. The method includes the following. Mixed light including the ambient light and screen leakage light is collected. A DC mean value of the mixed light is obtained. A DC mean value of the screen leakage light is obtained. A DC mean value of the ambient light is determined by subtracting the DC mean value of the screen leakage light from the DC mean value of the mixed light. The DC mean value of the ambient light is indicative of the intensity of the ambient light.
An imaging pixel design is provide with a photo-sensor block structure that facilitates dynamic control of well capacity in the photodiode region (i.e., a “well capacity adjustment (WCA) gate photo-sensor block”). The photodiode region includes a doped well in which photocharge is accumulated responsive to exposure to incident illumination. The capacity of the well corresponds to a well potential. WCA structures (e.g., deep trench regions) form walls at least partially surrounding and capacitively coupling with the doped well, such that biasing of the WCA structures changes the well potential and the corresponding well capacity. As such, the WCA structures can be biased during integration to increase the well potential to a high level for large well capacity, and the WCA structures can be differently biased during photocharge transfer to decrease the well potential to a sufficiently low level that avoids lag and/or other conventional concerns.
Embodiments of the present application provide a method for fingerprint identification, and electronic device. The method includes: acquiring a first image collected by a fingerprint sensor at a first exposure time; determining whether to acquire a second image collected by the fingerprint sensor at a second exposure time according to the first image, where the second exposure time is continuous with the first exposure time, and a length of the second exposure time is greater than or equal to a length of the first exposure time; performing fingerprint identification according to the first image, or, the first image and the second image. The method, and electronic device of the embodiments of the present application can take into account an unlocking rate and unlocking time, thereby improving unlocking experience of a user.
G06V 10/98 - Detection or correction of errors, e.g. by rescanning the pattern or by human intervention; Evaluation of the quality of the acquired patterns
32.
METHOD AND APPARATUS FOR DETECTING AMBIENT LIGHT UNDER DISPLAY SCREEN AND ELECTRONIC DEVICE
A method for detecting ambient light under a display screen includes: acquiring first sampling data of a sensor under a first sampling parameter; acquiring a current main frequency of the display screen; determining whether the first sampling data is valid according to the current main frequency and a standard main frequency of the display screen; adjusting the first sampling parameter as a second sampling parameter according to the current main frequency and the standard main frequency, when the first sampling data is invalid; acquiring second sampling data of the sensor under the second sampling parameter; and determining intensity of the ambient light according to the second sampling data. The method of the present application can effectively avoid an ambient light detection error caused by the offset of the main frequency of the display screen or the sensor, and improve accuracy of the ambient light detection.
Embodiments of the present application provide a method and apparatus for locating a sensor under a display screen and an electronic device, which can effectively improve performance of the sensor, thereby improving performance of the electronic device. The method includes: acquiring an assembly tolerance region in the display screen, where the assembly tolerance region corresponds to an assembly tolerance of the sensor; lighting up pixels at different positions within the assembly tolerance region sequentially; acquiring multiple pieces of sensing data of the sensor when the pixels at different positions are lit up sequentially, the multiple pieces of sensing data being data obtained after the sensor sequentially receives light signals emitted by the pixels at different positions; and determining a position of the sensor according to the multiple pieces of sensing data.
G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
G09G 5/12 - Synchronisation between the display unit and other units, e.g. other display units, video-disc players
G09G 3/20 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix
34.
Ambient light sensor and electronic device wherein a detected signal amount of infrared light in the ambient light is configured to correct a pixel value of a pixel unit corresponding to a color light filtering unit
The present application provides an ambient light sensor and an electronic device, which may improve detection accuracy and detection performance of the ambient light sensor. The ambient light sensor includes: a light filtering unit array including a plurality of light filtering units, the plurality of light filtering units including a color light filtering unit, a white light filtering unit and a transparent light filtering unit, the white light filtering unit being configured to pass a visible light signal and block an infrared light signal, and the transparent light filtering unit being configured to pass the visible light signal and the infrared light signal; a pixel unit array including a plurality of pixel units, the plurality of pixel units being configured to receive a light signal after the ambient light passes through the plurality of light filtering units for an ambient light detection.
Embodiments provide a method, an apparatus and an electronic device for estimating a screen light leakage amount, and the method includes: acquiring a first screen light leakage estimation model of a first electronic device; acquiring a first detection value of a variable of the screen light leakage estimation model of the first electronic device under a preset configuration; acquiring a second detection value of the variable of a second electronic device under the preset configuration; determining a difference coefficient of the second electronic device relative to the first electronic device according to the first detection value and the second detection value; and determining a second screen light leakage estimation model of the second electronic device according to the first screen light leakage estimation model and the difference coefficient, and the second screen light leakage estimation model being configured to estimate the screen light leakage amount of the second electronic device.
The present application provides a method, apparatus, and electronic device for detecting ambient light under a display screen, which could reduce the influence of a light leak from a screen on detection of the ambient light. The method includes: generating an interval identification signal for screen light of the display screen according to a dimming period of the display screen, the interval identification signal being used to identify the screen light that is within a specific time interval in the dimming period; performing data collection according to a sampling signal; reading data of a target sampling period from data of a plurality of sampling periods of the sampling signal according to the interval identification signal, the target sampling period being a sampling period in which sampling time overlaps with the specific time interval in time; and detecting the ambient light according to the data of the target sampling period.
A signal driving method is provided. One signal driving cycle includes two signal driving periods in which drive signals are applied to P detection electrodes. In a first period, applying non-inverting and inverting drive signals respectively to M adjacent detection electrodes and N adjacent detection electrodes. The non-inverting and inverting drive signals respectively applied to the M and N electrodes cancel each other out, M+N≤P and |M-N|≤Q. In a second period, applying the non-inverting and inverting drive signals respectively to K adjacent detection electrodes and L adjacent detection electrodes. The non-inverting and inverting drive signals respectively applied to the K and L electrodes cancel each other out, K+L≤P, |K-L|≤Q and M+K≥P. Q denotes a number of detection electrodes which makes an active pen not cause moire after the cancelling, and P denotes a number of detection electrodes not greater than a number of detection electrodes on a touch control screen.
A method for establishing synchronization relationship, a chip, an electronic device, and a non-transitory computer-readable storage medium are provided. The method includes the following. A synchronization pulse of the master device is initiated according to a pulse period preset. A start time of a K1th synchronization pulse and a start time of a K2th connection event of a slave device are obtained, and an offset time is obtained according to the start time of the Klth synchronization pulse and the start time of the K2th connection event. First synchronization information is transmitted to the slave device for the slave device to start a local synchronization pulse synchronized with the synchronization pulse of the master device according to the first synchronization information. The first synchronization information carries a count value K1, a count value K2, the offset time, and the pulse period.
Techniques are described for non-invasive, cuff-less measurement of blood pressure of a user using a portable electronic device. Illumination is projected through a body part and received by photodetectors on the other side of the body part. The body part includes elastic pathways of the circulatory system through which blood flows. Cycles of contraction and relaxation by the heart cause pulse waves to travel through the blood, which cause volumetric changes in the elastic pathways. The transient changes in blood volume result in corresponding transient changes in the amount of illumination that is absorbed by the body part versus the amount that passes through to the photodetectors, as manifest by a detection output signal. Calibration data can be used to convert the detection output signal to blood pressure measurements, such as including diastolic and systolic blood pressure readings.
A communication circuit is disclosed. The communication circuit includes a clock input, and a clock divider configured to generate an output clock signal having a fundamental frequency which is substantially equal to a fundamental frequency of an input clock signal received at the clock input divided by a factor of (2N+1)/2N, where the clock divider is configured to generate 2N+1 pre-aligned phase shifted clock signals based at least in part on the input clock signal, generate 2N unique phase shifted clock signals based at least in part on the 2N+1 pre-aligned phase shifted clock signals, where the 2N unique phase shifted clock signals are substantially separated in phase by 360/2N degrees, and generate the output clock signal based at least in part on the 2N unique phase shifted clock signals, and a mixer, configured to receive the output clock signal.
A communication circuit is disclosed. The communication circuit includes a calibration system, configured to receive clock signals respectively having first and second clock phases, and first and second duty cycles, where the calibration system is further configured to receive input data and to adjust the input data to generate adjusted data based partly on the input data and based partly on the first and second duty cycles. The communication circuit also includes a mixer, configured to receive the clock signals and to receive the adjusted data, where the mixer is configured to generate output data based on the clock signals and the adjusted data, and where a mismatch in the output data caused by the first and second duty cycles being different is reduced because of the adjustment made to the input data to generate the adjusted data.
The present application provides a synchronization method and a synchronization device, which may effectively realize synchronization between a touch screen and the active pen. The synchronization method is configured for time synchronization between a first detection chip of a first device and a second detection chip of a second device, and the method includes: a first wireless communication chip connected to the first detection chip, receiving the first synchronization signal sent by the first detection chip at a first moment; the first wireless communication chip sending time information associated with the first moment to a second wireless communication chip connected to the second detection chip; and the time information being configured to determine a second moment for the first detection chip to send the synchronization signal next time, so that the second detection chip is synchronized with the first detection chip at the second moment.
G06F 3/0354 - Pointing devices displaced or positioned by the user; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
G06F 3/038 - Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
43.
UNIFORM-BRIDGE-GRADIENT TIME-OF-FLIGHT PHOTODIODE FOR IMAGE SENSOR PIXEL
A uniform bridge gradient (UBG) time-of-flight (ToF) photodiode block is described, such as for integration with image sensor pixels. The UBG ToF photodiode block can be part of a UBG ToF pixel, and an image sensor can include an array of such pixels. Each UGB ToF photosensor block has multiple taps for selective activation, and a photodiode region designed for complete and rapid transit of photocarriers, as they are generated, via the multiple taps. Embodiments of the photodiode region include a photodiode-defining implant, a relatively shallow first bridging implant, and relatively deep second bridging implant. The bridging implants provide lateral bridging with a uniform doping gradient near and across the multiple taps.
H04N 5/3745 - Addressed sensors, e.g. MOS or CMOS sensors having additional components embedded within a pixel or connected to a group of pixels within a sensor matrix, e.g. memories, A/D converters, pixel amplifiers, shared circuits or shared components
H04N 5/378 - Readout circuits, e.g. correlated double sampling [CDS] circuits, output amplifiers or A/D converters
The present disclosure provides a method for wireless communication, which is applicable to wireless communication between the active pen and the plurality of touch screens, the plurality of touch screens respectively correspond to a plurality of wireless channels, a respective wireless channel is used for wireless communication between a touch screen and the active pen, and the method includes: the active pen sends a coding signal to the first touch screen; the active pen receives a wireless signal sent by the first touch screen, the wireless signal carries identification information of the first touch screen; the active pen identifies the first touch screen that is currently close to or in contact with the active pen according to the identification information of the first touch screen; and the active pen sends a wireless message to the first touch screen through the wireless channel corresponding to the first touch screen.
G06F 3/041 - Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
G06F 3/0354 - Pointing devices displaced or positioned by the user; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
G06F 3/038 - Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
45.
Bidirectional phase-based distance estimation with crystal offset
A transceiver circuit is disclosed. The transceiver circuit includes an antenna, a receiver RF chain configured to receive a receiver RF signal from the antenna, a transmitter RF chain configured to transmit a transmitter RF signal to the antenna, and a controller configured to cause the receiver RF chain to receive a first distance estimate between the antenna and another transceiver circuit, to calculate a second distance estimate between the antenna and the other transceiver circuit, and to determine a range estimate between the antenna and the other transceiver circuit based on the first distance estimate and the second distance estimate.
H04B 1/3805 - Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving with built-in auxiliary receivers
H04B 1/00 - TRANSMISSION - Details of transmission systems not characterised by the medium used for transmission
H04B 1/20 - Circuits for coupling gramophone pick-up, recorder output, or microphone to receiver
H04B 1/403 - Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
46.
TRENCH-GATE SOURCE FOLLOWER FOR LOW-NOISE SCALED PIXEL
A trench-gate source-follower (TGSF) transistor is described, such as for integration with image sensor pixels. The TGSF transistor is at least partially built into a trench etched into a substrate. A contiguous doped region is implanted around the inner walls of the trench to form a buried-trench current channel. A trench-gate is formed to have at least a buried portion that fills the volume of the trench. A gate oxide layer can be disposed between the buried portion of the trench-gate and the buried-trench current channel. Drain and source regions are formed on either end of the trench-gate. Activating the trench-gate causes current to flow between the drain and source regions via the buried-trench current channel around the buried portion of the trench-gate. The geometry of the buried-trench current channel can effectively increase the width of the active region of the source-follower transistor without increasing its physical layout width.
Embodiments of the present disclosure disclose a method for detecting ambient light sensing value, an electronic device and a storage medium. The method includes: collecting a light sensing value when a display screen is in an on state, to obtain a first light sensing value; collecting a light sensing value when the display screen is in an off state, to obtain a second light sensing value; calculating a difference between the first light sensing value and the second light sensing value, to obtain a light sensing value drop depth; acquiring a first calibration coefficient or a second calibration coefficient; calculating the ambient light sensing value based on the first light sensing value, the light sensing value drop depth and the first calibration coefficient; or calculating the ambient light sensing value based on the second light sensing value, the light sensing value drop depth and the second calibration coefficient.
G09G 3/34 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source
48.
TRANSMISSION APPARATUS FOR LASER RADAR, LASER RADAR APPARATUS AND ELECTRONIC DEVICE
A transmission apparatus for laser radar, which includes: a light source including a light emitting array composed of M*N light emitting unit(s) configured for transmitting M*N beam(s) of light, where each row of the light emitting units of the light emitting array are arranged along a first direction, each column of the light emitting units of the light emitting array are arranged along a second direction; a collimating mirror configured for collimating the M*N beam(s) of light; a diffusion sheet including a first field of view in the first direction configured for converting the M*N beam(s) of light into M*N beam(s) of linear light with a first divergence angle in the first direction, and projecting the linear light to a target object to form N linear light spots parallel to the first direction, and the first field of view being equal to the first divergence angle.
G05D 1/02 - Control of position or course in two dimensions
H01S 5/183 - Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL]
Embodiments of the present application disclose a fingerprint identification apparatus and an electronic device, which can simplify an optical path laminated structure and processing process, thereby improving efficiency of mass production. The fingerprint identification apparatus includes: a fingerprint sensor chip; an infrared radiation cut filter layer provided above the fingerprint sensor chip; a light blocking layer provided on an upper surface of the infrared radiation cut filter layer by means of coating film, the light blocking layer being provided with a first hole array, and cross sections of holes in the first hole array being inverse trapezoid; a light transmitting dielectric layer including first color filter units, the first color filter units being formed in part of the holes in the first hole array to cover the part of the holes; and a microlens array provided above the light transmitting dielectric layer.
A transceiver circuit is disclosed. The transceiver circuit includes an antenna, a receiver RF chain configured to receive a receiver RF signal from the antenna, a transmitter RF chain configured to transmit a transmitter RF signal to the antenna, and a controller configured to access a CFO (carrier frequency offset) estimate, and to, for each of one or more working frequencies: cause the receiver RF chain to receive a receiver RF signal from the antenna at each working frequency, generate I/Q measurement data based at least in part on the received receiver RF signal and the CFO estimate, store the I/Q measurement data, and cause the transmitter RF chain to transmit a transmitter RF signal to the antenna at each working frequency, where the controller is further configured to cause the transmitter RF chain to transmit the I/Q measurement data for each working frequency to the antenna.
H04B 1/403 - Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
H04B 1/48 - Transmit/receive switching in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter
The present disclosure discloses a driving circuit and a related chip and electronic device. The driving circuit is configured to drive a load and includes: a control unit, configured to generate a first control signal and a second control signal; a first output terminal, coupled to the capacitive touch screen; a mutual capacitive driving circuit, including: a first pull-up unit, configured to selectively pull up the first output terminal coupled to a high voltage level according to the first control signal; a first pull-down unit, configured to selectively couple the first output terminal to a low voltage level according to the second control signal; a first low-pass filter circuit, coupled between the control unit and the first pull-up unit; and a second low-pass filter circuit, coupled between the control unit and the first pull-down unit.
Provided are an apparatus for acquiring a depth image, a method for fusing depth images, and a terminal device. The apparatus for acquiring a depth image includes an emitting module, a receiving module, and a processing unit. The emitting module is configured to emit a speckle array to an object, where the speckle array includes p mutually spaced apart speckles. The receiving module includes an image sensor. The processing unit is configured to receive the pixel signal and generate a sparse depth image based on the pixel signal, align an RGB image at a resolution of a*b with the sparse depth image, and fuse the aligned sparse depth image with the RGB image using a pre-trained image fusion model to obtain a dense depth image at a resolution of a*b.
Some embodiments of the present disclosure provide a voice call method, a system, a chip, an electronic device, and a storage medium. In the present disclosure, the voice call method includes: in response to receiving a voice call request instruction from a second terminal in a process of transmitting a voice call data packet with a first terminal, sending a request for disconnecting synchronous data connection to the first terminal (101); transmitting the voice call data packet to the second terminal (102) after receiving a request for establishing the synchronous data connection sent by the second terminal. In a scenario where there are incoming calls from multiple terminals, data communication load of a Bluetooth chip can be lessened, and power consumption of the Bluetooth chip can be reduced.
H04W 4/80 - Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
Techniques are described for efficient high-resolution output of an image captured using a high-pixel-count image sensor based on pixel binning followed by luminance-guided umsampling. For example, an image sensor array is configured according to a red-green-blue-luminance (RGBL) CFA pattern, such that at least 50-percent of the imaging pixels of the array are luminance (L) pixels. Pixel binning is used during readout of the array to concurrently generate a downsampled RGB capture frame and a downsampled L capture frame. Following the readout, the L capture frame is upsampled (e.g., by upscaling and interpolation) to generate an L guide frame with 100-percent luminance density. An upsampled RGB frame can then be generated by interpolating the RGB capture frame based both on known neighboring RGB information (e.g., from the RGB capture frame and previously interpolated information), as adjusted based on local luminance information from the L guide frame.
H04N 25/46 - Extracting pixel data from image sensors by controlling scanning circuits, e.g. by modifying the number of pixels sampled or to be sampled by combining or binning pixels
H04N 25/75 - Circuitry for providing, modifying or processing image signals from the pixel array
H04N 25/13 - Arrangement of colour filter arrays [CFA]; Filter mosaics characterised by the spectral characteristics of the filter elements
G06T 3/40 - Scaling of a whole image or part thereof
H04N 9/77 - Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
H04N 23/84 - Camera processing pipelines; Components thereof for processing colour signals
H04N 25/42 - Extracting pixel data from image sensors by controlling scanning circuits, e.g. by modifying the number of pixels sampled or to be sampled by switching between different modes of operation using different resolutions or aspect ratios, e.g. switching between interlaced and non-interlaced mode
Techniques are described for implementing a split-select-block (split-SEL) complementary metal-oxide semiconductor (CMOS) image sensor (CIS) pixel physical architecture, such as for reducing noise in low-light application contexts. The split-SEL CIS pixel physical architecture can include a pixel block with one or more photodiodes. Above the photodiodes, there can be: a first oxide diffusion region with a reset block and a gain block disposed thereon; and a second oxide diffusion region with a select block disposed thereon. Below the photodiodes, there can be a third oxide diffusion region with a source follower (SF) block (e.g., a square-gate SF transistor) disposed thereon. A trace can be routed through the set of photodiodes to couple the source of the SF block with the select block. The architecture permits an appreciable increase in the physical gate length and/or other features.
The present disclosure provides a method and system for data transmission, chip, an electronic device, and a computer readable storage medium. The method applied at a first Bluetooth end includes: establishing a point-to-point connection with a second Bluetooth end; acquiring identity information of the second Bluetooth end through the point-to-point connection; and sending broadcast isochronous group information BIGInfo to the second Bluetooth end through the point-to-point connection when the identity information of the second Bluetooth end is verified, to enable the second Bluetooth end to receive a data stream of a broadcast isochronous group BIG sent by the first Bluetooth end according to the BIGInfo.
H04W 76/15 - Setup of multiple wireless link connections
H04W 4/80 - Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
A method for audio signal noise cancellation is provided. In response to current noise cancellation coefficients being required to be updated to new noise cancellation coefficients, the digital signal processor calculates the new noise cancellation coefficients and writes the new noise cancellation coefficients into an idle storage module in the at least two storage modules, and the digital signal processor sends an update request for updating the noise cancellation coefficients to the active noise cancellation module. The update request carries position information configured to indicate a position of the storage module to which the new noise cancellation coefficients is written. The active noise cancellation module reads the new noise cancellation coefficients in the storage module indicated by the position information based on the position information carried in the update request, and performs noise cancellation processing according to the new noise cancellation coefficients after a current noise cancellation processing cycle ends.
G10K 11/16 - Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
H04R 3/02 - Circuits for transducers for preventing acoustic reaction
G10K 11/178 - Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
58.
METHOD FOR TIME SYNCHRONIZATION, METHOD FOR BROADCAST SETTING, CHIP, ELECTRONIC DEVICE, AND STORAGE MEDIUM
Some embodiments of the present disclosure provide a method for time synchronization, a method for broadcast setting, a chip, an electronic device, and a storage medium. In the present disclosure, time synchronization information is received, wherein the time synchronization information includes a first count value N of at least one connection event at a synchronizing end and a first time, and the first time refers to a time of occurrence of an Nth connection event (101); a second count value K of the at least one connection event and a second time are determined according to at least the first count value N and the first time, wherein the second time refers to a time of occurrence of a Kth connection event, and both N and K are natural numbers (102); and time synchronization is performed based on the second time in response to occurrence of the Kth connection event (103).
H04W 4/06 - Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
59.
Passive three-dimensional object authentication based on image sizing
Techniques are described for passive three-dimensional (3D) object authentication based on image sizing, such as for biometric facial recognition. For example, during a registration routine, an imaging system captures images of a registering user's face at multiple distances. The images can be processed to extract registration dimensions, including individual deterministic structural dimensions, dimensional relationships that are static over changes in imaging distance, and dimensional relationships that changes predictably over changes in imaging distance. During an authentication routine, the imaging system again captures authentication images of an authenticating user's face (purportedly the previously registered user) at some authentication imaging distance and processes the images to extract authentication dimensions. Expected and actual dimensional quantities are computed from the authentication and registration dimensions and are compared to determine whether the authenticating user's face appears to be authorized as previously registered and/or is a spoof.
Techniques are described for integrating blood pressure measurement (BPM) into a portable electronic device. For example, an input interface of the device includes an integrated force sensor. Human-discernable feedback is output to the user, while using the force sensor to monitor fingertip pressure being applied by the user on the input interface, to guide the user into a first condition in which capillary fingertip blood flow (CFBF) is occluded. The human-discernable feedback is then output to the user, while continuing to use the force sensor to monitor the fingertip pressure, to guide the user into one or more subsequent conditions that allow non-occluded CFBF signals to be sensed by one or more sensors (e.g., the force sensor, an optical fingerprint sensor, etc.). The sensed non-occluded CFBF signals can be used to generate one or more CFBF-based BPM readings for the user (e.g., which can be calibrated to arterial BPM).
A transceiver circuit is disclosed. The transceiver circuit includes an antenna, a receiver RF chain configured to receive a receiver RF signal from the antenna, a transmitter RF chain configured to transmit a transmitter RF signal to the antenna, a frequency synthesizer configured to generate an oscillator signal, and a controller configured to cause the receiver RF chain to receive a first reflection signal from the antenna, down convert the first reflection signal to a non-zero intermediate frequency, and determine a range estimate to another transceiver circuit based on a phase of the first reflection signal.
H04B 1/38 - Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
H04B 1/403 - Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
H04B 1/48 - Transmit/receive switching in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter
The present application provides a capacitance detection module, a method and an electronic device, including: a sensing module and detecting circuit; a first sensing unit is disposed on the first surface of the sensing module, and a second sensing unit is disposed on the second surface of the sensing module; the first sensing unit and the second sensing unit are respectively connected to the detecting circuit; the detecting circuit is configured to determine, according to the capacitance value of the first sensing unit and the capacitance value of the second sensing unit, the wearing state of the user to the device having the capacitance detection module. Thereby the problem that the capacitance detection is affected by temperature is avoided.
A61B 5/00 - Measuring for diagnostic purposes ; Identification of persons
G01R 27/26 - Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants
G01D 5/24 - Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
63.
Method and chip for biometric characteristic acquisition, and computer readable storage medium
Some embodiments of the present disclosure relate to biometric characteristic detection technology, which provide a method and chip for biometric characteristic acquisition, and a computer readable storage medium. The method for biometric characteristic acquisition includes: acquiring a plurality of configuration parameters, where the plurality of configuration parameters include a first exposure duration, parameters defining a first region and a target photosensitive value, where the first region is a local region in a photosensitive region of the chip for biometric characteristic acquisition; exposing the first region according to the first exposure duration, and acquiring a photosensitive value of the first region; determining a second exposure duration required to acquire the target photosensitive value in the photosensitive region according to the photosensitive value of the first region and the first exposure duration; and acquiring a biometric image according to the second exposure duration.
A pressure detection module and an electronic device are provided. The pressure detection module is disposed between a support and an inner surface of a housing of the electronic device. The pressure detection module includes a first electrode, a second electrode, and a controller. The first electrode is fixed to an inner surface of a force input region of the housing, the second electrode is fixed to the support, and the second electrode is disposed opposite to the first electrode. The force input region of the housing is configured to drive the first electrode to move towards the second electrode based on a received external pressure. The controller is configured to determine a pressure detection result of the external pressure based on a capacitance change between the first electrode and the second electrode. The pressure detection module occupies small space in the electronic device, and is easy to mount.
G01L 1/14 - Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
65.
Disparity-preserving binning for phase detection autofocus in digital imaging systems
Techniques are described for disparity-preserving pixel binning during consistently binned parallel readout of an imaging sensor array having both phase detection autofocus (PDAF) pixels and imaging pixels. Each group of PDAF pixels and each group of imaging pixels is coupled with pixel actuators according to an particular arrangement, so that consistently applied control of the pixel actuators results in desired binning of both the PDAF pixels and the imaging pixels. According to some implementations, though such control of the pixel actuators is consistently applied across the pixels of the array, parallel readout of the sensor array yields diagonally binned imaging pixels, but vertically binned PDAF pixels to preserve horizontal PDAF disparity information. Additionally or alternatively, disparity-inducing structures are configured to position same-disparity PDAF pixels so that consistently applied control of the pixel actuators preserves disparity information during binning.
H04N 5/347 - Extracting pixel data from an image sensor by controlling scanning circuits, e.g. by modifying the number of pixels having been sampled or to be sampled by combining or binning pixels in SSIS
A transceiver is disclosed. The transceiver accesses a CFO (carrier frequency offset) estimate, and, for each of one or more working frequencies: transmits a transmitter RF signal at each working frequency, receives a receiver RF signal at each working frequency, and generates first I/Q measurement data based at least in part on the received receiver RF signal and the CFO estimate. In some embodiments, the transceiver receives I/Q measurement information for each working frequency. In some embodiments, the transceiver generates second I/Q measurement data based at least in part on the received I/Q measurement information. In some embodiments, the transceiver estimates a distance between the antenna and an antenna of another device based at least in part on the first and second I/Q measurement data.
H04B 1/403 - Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
H04B 1/48 - Transmit/receive switching in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter
67.
CAPACITIVE FINGERPRINT IDENTIFICATION APPARATUS, PREPARATION METHOD AND ELECTRONIC DEVICE
A capacitive fingerprint identification apparatus, a preparation method and an electronic device can improve the performance of a capacitive fingerprint apparatus and the users' using experience. The capacitive fingerprint identification apparatus is configured to be provided on an arc-shaped surface of the electronic device, including: a capacitive fingerprint identification package structure; an arc surface structure, including a first surface and a second surface, where the first surface of the arc surface structure is a plane, the second surface of the arc surface structure is an arc surface. Setting the arc surface structure on the capacitive fingerprint identification apparatus can not only make itself and the electronic device where it is located more aesthetical in appearance and have a more three-dimensional sense, but also protect the electronic device when the electronic device is dropped, so the influence on the capacitive fingerprint identification apparatus is small.
A method for capacitive fingerprint identification. The method is applied to an electronic device with a capacitive fingerprint identification apparatus which has a special-shaped surface. The method includes: obtaining a number of driving signals N(i) of an ith column of pixel electrodes; and performing signal driving to the ith column of pixel electrodes to obtain an output voltage according to the number of driving signals N(i), the output voltage corresponds to the capacitor, and the output voltage is configured for fingerprint identification. The present application can controls a column average output voltage of the pixel electrode at a similar level, so as to facilitate algorithmic processing, at the same time, a risk of data saturation with up and down fluctuations is reduced, and thereby the performance of fingerprint identification is improved.
A fingerprint identification method, includes: collecting a first fingerprint image according to a sampling parameter; determining a collection environment of the first fingerprint image according to the first fingerprint image and a pre-stored reference image, wherein the reference image is a fingerprint image obtained under a reference light environment; processing the first fingerprint image according to a processing parameter corresponding to the collection environment; and performing fingerprint identification according to the processed first fingerprint image. By pre-storing the reference image, the present application can quickly judge the collection environment of the fingerprint by collecting only one fingerprint image, which saves time for collecting the fingerprint image and judging the collection environment, and improves the identification efficiency of the fingerprint effectively.
Techniques are described for efficient staggered high-dynamic-range (HDR) output of an image captured using a high-pixel-count image sensor based on pixel binning followed by luminance-guided upsampling. For example, an image sensor array is configured according to a red-green-blue-luminance (RGBL) CFA pattern, such that at least 50-percent of the imaging pixels of the array are luminance (L) pixels. In each image capture time window, multiple (e.g., three) luminance-enhanced (LE) component images are generated. Each LE component image is generated by exposing the image sensor to incident illumination for a respective amount of time, using pixel binning during readout to generate appreciably downsampled color and luminance capture frames, generating an upsampled luminance guide frame from the luminance capture frame, and using the upsampled luminance guide frame to guide upsampling (e.g., and remosaicking) of the color capture frame. The resulting LE components images can be digitally combined to generate an HDR output image.
H04N 9/64 - Circuits for processing colour signals
H04N 5/347 - Extracting pixel data from an image sensor by controlling scanning circuits, e.g. by modifying the number of pixels having been sampled or to be sampled by combining or binning pixels in SSIS
H04N 5/378 - Readout circuits, e.g. correlated double sampling [CDS] circuits, output amplifiers or A/D converters
H04N 5/345 - Extracting pixel data from an image sensor by controlling scanning circuits, e.g. by modifying the number of pixels having been sampled or to be sampled by partially reading an SSIS array
G06T 3/40 - Scaling of a whole image or part thereof
G06T 5/50 - Image enhancement or restoration by the use of more than one image, e.g. averaging, subtraction
Techniques are described for sampled bandgap reference generation for CMOS image sensor (CIS) applications. For example, the CIS includes a pixel array, one or more pixel analog to digital converters (ADCs), and a sampled bandgap reference generator, all integrated in close proximity on a chip. The ADCs rely on stable reference levels from the bandgap reference generator for performing pixel conversions for the pixel array. Embodiments of the sampled bandgap reference generator can operate according to reference generation cycles. Each cycle can include a first portion, in which an active core dynamically stabilizes the bandgap reference level; and a second portion, in which the core is deactivated, and the bandgap reference level is output based on a sampled level obtained during the preceding first portion of the cycle. The cycle timing can be controlled to achieve sufficient dynamic stabilization of the reference levels, while mitigating photon emissions from the core.
H04N 5/378 - Readout circuits, e.g. correlated double sampling [CDS] circuits, output amplifiers or A/D converters
H04N 5/357 - Noise processing, e.g. detecting, correcting, reducing or removing noise
H04N 5/3745 - Addressed sensors, e.g. MOS or CMOS sensors having additional components embedded within a pixel or connected to a group of pixels within a sensor matrix, e.g. memories, A/D converters, pixel amplifiers, shared circuits or shared components
72.
Method for fingerprint detection, fingerprint sensor and electronic device
A method for fingerprint detection, which may more easily reduce an influence of a brightness change of a display screen on the fingerprint detection and improve performance of the fingerprint detection. The method for the fingerprint detection includes: receiving a synchronization signal of a display screen, the synchronization signal being configured to trigger a pixel array of a fingerprint sensor to expose, where a period of the synchronization signal is synchronized with a dimming period of the display screen, and the dimming period includes a bright period and a dark period; exposing each row of pixels in the pixel array in sequence based on triggering of the synchronization signal, so that a position of the pixel whose exposure time corresponding to the dark period in the pixel array is constant, where data of each row of the pixels after exposure is configured to obtain a fingerprint image.
G06V 10/147 - Optical characteristics of the device performing the acquisition or on the illumination arrangements - Details of sensors, e.g. sensor lenses
An electronic system is disclosed. The system has a differential signal generator configured to generate first and second single ended signals having opposite polarities. The input signal, and the first and second single ended signals transition between a first power voltage and a first ground voltage. The system also has a glitch management circuit configured to generate an output signal based on the first and second single ended signals, where the output signal transitions between a second power voltage and a second ground voltage. The glitch management circuit includes a first latch configured to receive the first and second single ended signals, and to generate first and second intermediate signals. The first and second intermediate signals each transition between the second power voltage and the second ground voltage. The system also has a second latch configured generate the output signal based on the first and second intermediate signals.
Techniques are described for implementing read-out architectures to support high-speed serialized read-out of a large number of digital bit values, such as for high-resolution pixel conversions in CMOS image sensor applications. For example, outputs from a large number of digital data sources (e.g., counters) are coupled with transmission gates of the read-out architecture, and the transmission gates are sequentially enabled, thereby shifting in bit data from the data sources one at a time. The transmission gates are grouped into gate groups. For each gate group, embodiments seek balance total path delay across the gate groups by controlling clock and data path delays to be inversely related, and ensuring that total path delays for all gate groups are within a single clock period. Some embodiments include a partitioned bus for further gate group-level control over the path delay and data bus capacitance.
H03K 5/00 - Manipulation of pulses not covered by one of the other main groups of this subclass
H04N 5/343 - Extracting pixel data from an image sensor by controlling scanning circuits, e.g. by modifying the number of pixels having been sampled or to be sampled by switching between different modes of operation using different resolutions or aspect ratios, e.g. between still and video mode or between interlaced and non-interlaced mode
A capacitance detection apparatus and earphone. The capacitance detection apparatus includes a front housing and a rear housing, where the capacitance detection apparatus includes: a circuit board, a sensing electrode and a processing unit which are provided at the front housing, where the circuit board, the sensing electrode and the processing unit are integrated together; the sensing electrode is arranged in a first area of the circuit board, the processing unit is arranged in a second area of the circuit board, and the sensing electrode and the processing unit are electrically connected through a metal wiring layer in the circuit board; the sensing electrode is configured to sense a to-be-measured object and form a capacitance detection signal, the capacitance detection signal is transmitted to the processing unit through the metal wiring layer, and the processing unit is configured to process the capacitance detection signal to detect the to-be-measured object.
Provided are a synchronization control method, a chip, an electronic device and a storage medium. A master device sets a reference time for a plurality of slave devices wirelessly connected to the master device; and determines a target count value K of a connection event and an offset time of a respective slave device for each of the plurality of slave devices. The master device transmits the target count value of the connection event and the offset time to the respective slave device, so that each of the plurality of slave devices performs control based on the target count value of the connection event and the offset time of the respective slave device, so as to perform a task at the reference time.
A wearing state detection method, a wearing state detection device, and a wearable device are provided. The method detects a wearing state of the wearable device and includes: emitting, by the light emitting unit, light of at least two different wavelengths to a subject in a time division manner; receiving, by the light receiving unit, reflected light corresponding to light of each wavelength after being reflected by the subject; obtaining intensity of reflected light corresponding to the light of each wavelength respectively; calculating a fluctuation range of a light intensity ratio, which is a ratio between intensity of the reflected light corresponding to light of the at least two different wavelengths received by a same light receiving unit; and determining that the device is in a wearing state when the fluctuation range is greater than or equal to a first threshold.
A laser emitting apparatus includes: a drive assembly, a laser emitter, an energy storage module, and a circuit board. The laser emitter is a laser emitter die. An input end of the laser emitter is electrically connected to the energy storage module, and an output end is electrically connected to the drive assembly. The energy storage module is used to generate electrical signals required for driving the laser emitter. The drive assembly is used to output the driving signal to control the energy storage module and the external power supply to output the electrical signal to the laser emitter, so as to enable the laser emitter to emit laser. The drive assembly, the laser emitter, and the energy storage module are fixed on the circuit board, and a ground layer is arranged in the circuit board.
Techniques are described for controlling operation of a pixel conversion ADC in a manner that enforces strict timing and synchronization of ramp and clock signaling. Synchronizing techniques can be applied to generate a corrected ramp start signal based on synchronizing a received ramp start signal to an input clocking signal, and to generate a controller clock signal based on synchronizing an input clocking signal to the corrected ramp start signal. The corrected ramp start signal and the controller clock signal can be used to control generation of a ramp enable signal for controlling timing of pixel ramp voltage generation digital pixel conversion counting, and to control generation of an output clocking signal used by the digital pixel conversion counting.
H04N 5/3745 - Addressed sensors, e.g. MOS or CMOS sensors having additional components embedded within a pixel or connected to a group of pixels within a sensor matrix, e.g. memories, A/D converters, pixel amplifiers, shared circuits or shared components
H04N 5/357 - Noise processing, e.g. detecting, correcting, reducing or removing noise
A radio frequency (RF) receiver circuit is disclosed. The RF receiver circuit includes a variable gain amplifier, configured to receive an input RF signal, and to generate an amplified RF signal based on the input RF signal, where a gain of the variable gain amplifier is variable. The RF receiver circuit also includes an RF level indicator circuit, configured to sample the amplified RF signal at non-periodic sampling intervals to generate a plurality of sampled RF signals, and to compare the sampled RF signals with one or more thresholds to generate a plurality of comparison result signals. The gain of the variable gain amplifier is determined based at least in part on the comparison result signals.
Embodiments of the present disclosure provide methods and apparatuses for detecting an ambient light illuminance and for computing a correction coefficient, and an electronic device. The method for detecting an ambient light illuminance includes: filtering ambient light based on a monochromatic channel, such that a quantum efficiency curve of the filtered light matches a spectral luminous efficiency curve; and performing photoelectric detection on the filtered light to obtain an illuminance level of the ambient light. In solutions of the embodiments of the present disclosure, the photoelectric detection may be equivalent to obtaining an illuminance level of light by convolutional computation based on a spectral luminous efficiency curve, and therefore, when the quantum efficiency curve for a monochromatic waveband obtained by filtering ambient light based on a monochromatic channel matches the spectral luminous efficiency curve, a reliable spectral luminous efficiency curve can be obtained with a small computing workload.
Embodiments of the present disclosure provide a method for updating a capacitance reference, which includes: determining, based on an n-th frame of raw capacitance data and an (n−M)-th frame of raw capacitance data outputted from the capacitance detection apparatus, a feature value corresponding to the n-th frame of raw capacitance data; computing a difference value between the n-th frame of raw capacitance data and a reference value corresponding to an (n−1)-th frame of raw capacitance data outputted from the capacitance detection apparatus, to obtain a capacitance variation; and determining, when the feature value corresponding to the n-th frame of raw capacitance data is less than a first threshold Thr1, and the capacitance variation is less than a proximity threshold Thron, the n-th frame of raw capacitance data or the (n−1)-th frame of raw capacitance data as a reference value corresponding to the n-th frame of raw capacitance data.
G01D 5/24 - Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
Disclosed are a driving circuit, a stylus and an electronic device. The driving circuit includes: a power supply assembly, at least one energy storage capacitor, a switch assembly and a driving electrode. In a driving cycle: the switch assembly is configured to control connections among the power supply assembly, the at least one energy storage capacitor and the driving electrode, so that the driving electrode outputs a first voltage, at least one second voltage and a third voltage, wherein the first voltage and the third voltage are respectively a maximum voltage and a minimum voltage output by the driving electrode, and the sum of energy storage voltages of the at least one energy storage capacitor is less than the first voltage. The driving circuit, the stylus and the electronic device of the embodiment of the present application could reduce a power consumption.
G06F 3/038 - Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
G06F 3/044 - Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
H03K 17/687 - Electronic switching or gating, i.e. not by contact-making and -breaking characterised by the use of specified components by the use, as active elements, of semiconductor devices the devices being field-effect transistors
H02J 7/34 - Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
A pressure detection module and an electronic device are provided. The pressure detection module includes: a first electrode, a second electrode, a first circuit board, a second circuit board, and at least two solder fixing parts. A first surface of the first circuit board is fixed to an inner surface of a force input area of the housing. A second surface of the first circuit board is fixed to a first surface of the first electrode. A first surface of the second circuit board is fixed to a second surface of the second electrode. Two end sides of the second surface of the first circuit board and two end sides of the first surface of the second circuit board are disposed opposed to each other through the at least two solder fixing parts. Thereby, the pressure detection module does not require a bracket and has a small thickness.
G01L 1/14 - Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
G01D 5/24 - Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
85.
METHOD AND APPARATUS FOR DETERMINING PRESSURE REFERENCE VALUE, AND CHIP AND ELECTRONIC DEVICE
Embodiments of the present disclosure provide a method and apparatus for determining a pressure reference value, and a chip and an electronic device. The method includes: consecutively acquiring N pressure signals by a pressure sensor; acquiring consecutive N pressure values on the basis of the N pressure signals; and determining a latest pressure reference value on the basis of the consecutive N pressure values and time characteristics of the consecutively acquired N pressure signals; wherein each of the pressure values is a difference between a sampling value corresponding to a pressure signal and the pressure reference value, and the consecutively acquired N pressure signals are acquired within a duration where a pressure is applied to the pressure sensor once, N being a positive integer greater than 0.
A method for determining a capacitance reference, an apparatus for determining a capacitance reference, and a device are provided. The method is applied to a device with double-layer capacitive sensors, and the method comprises: obtaining a first differential capacitance value of the double-layer capacitive sensors, the first differential capacitance value being a minimum differential capacitance value obtained when the device is out of a box, and the box being a matching device paired with the device and used to receive the device; and determining a latest differential capacitance reference value according to the first differential capacitance value and a differential capacitance reference value. By tracking and updating the differential capacitance reference value, a more accurate capacitance reference is provided to ensure the accuracy of capacitance change detection, and then to ensure the accuracy of detection on the behavior state of the device.
a camera calibration method, apparatus and an electronic device. The method includes: obtaining a calibration board image, where the calibration board image includes a plurality of annular patterns; obtaining an inner edge and an outer edge of each annular pattern in the calibration board image; determining image coordinates of a center point of each annular pattern according to the inner edge and the outer edge of each annular pattern; and determining internal and external parameters of a camera according to the image coordinates and corresponding world coordinates of the center point of each annular pattern. The accuracy of camera calibration is improved.
G06V 10/24 - Aligning, centring, orientation detection or correction of the image
G06V 10/56 - Extraction of image or video features relating to colour
G06V 10/44 - Local feature extraction by analysis of parts of the pattern, e.g. by detecting edges, contours, loops, corners, strokes or intersections; Connectivity analysis, e.g. of connected components
G06V 10/34 - Smoothing or thinning of the pattern; Morphological operations; Skeletonisation
G06T 7/70 - Determining position or orientation of objects or cameras
H04N 17/00 - Diagnosis, testing or measuring for television systems or their details
88.
Method and system for managing virtual electronic card, secure chip, terminal and storage medium
A method for managing a virtual electronic card is applicable to a secure chip installed in a first terminal, and the method includes: receiving a management request from a trusted mobile application on the first terminal, the management request being used to manage a target virtual electronic card on the secure chip, and permissions of the virtual electronic card being configured by a chip operating system of the secure chip; determining, from the secure chip, a target card management program corresponding to the target virtual electronic card, the different virtual electronic cards corresponding to the different card management programs; sending the management request to the target card management program; and calling, through the target card management program, a card management command corresponding to the management request in a card management system on the secure chip, to manage the target virtual electronic card.
G06Q 20/34 - Payment architectures, schemes or protocols characterised by the use of specific devices using cards, e.g. integrated circuit [IC] cards or magnetic cards
G06Q 20/32 - Payment architectures, schemes or protocols characterised by the use of specific devices using wireless devices
The present application provides a capacitor and a method for producing the same The capacitor includes: a multi-wing structure, including N groups of wing structures and N support structures, each group of the wing structures includes M wing structures arranged in parallel, M limit slots are formed on an outer side wall of the support structure, the M wing structures are fixed on outside of the support structure through the M limit slots, respectively, and M and N are positive integers; a laminated structure, covering the multi-wing structure and including at least one dielectric layer and a plurality of conductive layers; at least one first external electrode, electrically connecting to part or all of the odd-number conductive layers in the plurality of conductive layers; and at least one second external electrode, electrically connecting to part or all of even-number conductive layers in the plurality of conductive layers.
H01L 23/522 - Arrangements for conducting electric current within the device in operation from one component to another including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
A hybrid ferroelectric-metal-oxide-semiconductor field effect transistor (Fe-MOSFET) device is described, such as for incorporation into in-pixel circuitry of an imaging pixel array to provide both reset and dual conversion gain features. The Fe-MOSFET includes source and drain regions implanted in a semiconductor substrate and separated by a channel region. The source region can be the floating diffusion region of a photosensor. A gate structure is deposited on the substrate directly above at least the channel region and an isolating layer is formed on the surface of the substrate to electrically isolate the gate structure from at least the channel region. The isolating layer is split into a Fe segment of ferroelectric material that can be written to different polarization states for conversion gain control, and a dielectric segment that can be used for current channel formation in the channel region.
H04N 5/351 - Control of the SSIS depending on the scene, e.g. brightness or motion in the scene
H04N 5/3745 - Addressed sensors, e.g. MOS or CMOS sensors having additional components embedded within a pixel or connected to a group of pixels within a sensor matrix, e.g. memories, A/D converters, pixel amplifiers, shared circuits or shared components
H04N 5/378 - Readout circuits, e.g. correlated double sampling [CDS] circuits, output amplifiers or A/D converters
91.
Biological information identification apparatus and electronic device
A biological information identification apparatus is provided, including: a fingerprint identification module and a packaging layer disposed on a surface of the fingerprint identification module facing a user, and configured to package the fingerprint identification module to insulate the fingerprint identification module from an outside environment, a top surface of the packaging layer being an arc surface. The fingerprint identification module includes: a fingerprint identification chip configured to identify fingerprint information of the user, where a plurality of capacitive pixel units are disposed on an upper surface of the fingerprint identification chip, and the capacitive pixel units are configured to form capacitance with a finger of the user; and a plurality of conductive elements disposed above the capacitive pixel units. An electronic device including the aforementioned biological information identification apparatus is provided.
A data transmission method, a first chip, an electronic device, and a storage medium are provided. Data transmission of the first chip with a second chip is performed in one of a standard working mode based on a standard Bluetooth protocol and a non-standard working mode including at least one of: a first working mode in which data is transmitted with the second chip in a designated first fixed channel of the standard channels; a second working mode in which data is transmitted with the second chip by frequency hopping among extended extension channels; a third working mode in which data is transmitted with the second chip in a designated second fixed channel of the extended extension channels; and a fourth working mode in which data is transmitted with the second chip by frequency hopping among the standard channels and the extended extension channels.
H04B 1/713 - Spread spectrum techniques using frequency hopping
H04W 4/80 - Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
93.
VOICE CONTROL METHOD AND APPARATUS, CHIP, EARPHONES, AND SYSTEM
A voice control method and apparatus, a chip, earphones, and a system. The method includes: recognizing (001) whether a voice signal includes a keyword; in response to the voice signal including the keyword, executing (001a) an instruction corresponding to the keyword or sending the instruction; before recognizing whether the voice signal includes the keyword, determining (002) whether the voice signal is from a target user and, in response to the voice signal being from the target user, starting to recognize (001) whether the voice signal includes the keyword; or during recognizing whether the voice signal includes the keyword, determining (002) whether the voice signal is from the target user and, in response to the voice signal being from a non-target user, stopping recognizing (003a) whether the voice signal includes the keyword. The voice control method reduces the power consumption of voice control and improves the endurance.
Embodiments of the present disclosure provide a method for switching a Bluetooth connection, a Bluetooth chip, and a Bluetooth device; where the method for switching a Bluetooth connection may be applied to the Bluetooth device. The method includes: establishing, by the Bluetooth device, Bluetooth connections with a first terminal device and a second terminal device; receiving, by the Bluetooth device, a content playing request from the first terminal device, and performing data transmission with the first terminal device; receiving, by the Bluetooth device, a content playing request from the second terminal device, and sending a notification message for suspending data transmission to the first terminal device; suspending, by the Bluetooth device, data transmission with the first terminal device, and maintaining the Bluetooth connection with the first terminal device; and performing, by the Bluetooth device, data transmission with the second terminal device.
H04W 4/80 - Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
H04W 4/20 - Services signalling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel
95.
SIGNAL ADJUSTMENT METHOD FOR PPG APPARATUS AND PPG APPARATUS
Provided are a signal adjustment method for a PPG apparatus and a PPG apparatus. The method comprises: when background light data or actual effective light data does not meet a preset background light data range or a preset first effective light data range, performing a dimming operation comprising: determining an estimated current transfer ratio; estimating a driving current required by a light source and a gain required by an analog front end; calculating estimated effective light data of a PPG apparatus according to the estimated driving current required by the light source, the gain required by the analog front end, and the estimated current transfer ratio; when the estimated effective light data meets a preset second effective light data range, generating a to-be-adjusted current/gain value according to the estimated driving current required by the light source and the gain required by the analog front end.
The present application relates to the field of signal processing, and in particular, to a hearing aid method and apparatus for noise reduction. A hearing aid method for noise reduction, comprising: identifying a scenario where a user is located; and if detection data contains sample data in a sample database corresponding to the scenario, entering a hearing aid mode, and in the hearing aid mode, playing back all or part of external sounds, the external sounds being acquired by a reference microphone; the sample database is a sample sound library, and the sample data is a sample sound; different scenarios correspond to different sample sound libraries; wherein the sample sounds in respective sample sound libraries are configured with priorities; and the sample sounds in the sample sound libraries corresponding to different scenarios have different priorities.
G10K 11/178 - Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
A touchpad and an electronic device are disclosed. The touchpad includes a touch panel; a plurality of pressure sensors fixed to an elastic bracket and configured to detect a pressure applied on the touch panel; a piezoelectric ceramic assembly including a piezoelectric ceramic plate configured to provide a vibration feedback to a user, where the piezoelectric ceramic assembly is fixed below the touch panel in a suspended manner and spaced from the elastic bracket.
Techniques are described for implementing a square-gate source-follower (SGSF) transistor for integration with complementary metal-oxide semiconductor (CMOS) image sensor (CIS) pixels. The SGSF transistor can have an active layer with active regions, including a drain region separated from each of two source regions to form parallel current channels. A square-gate structure layer includes main-gate regions, each disposed above a corresponding one of the current channels, and a side-gate region to couple the main-gate regions. At a particular physical width (W) and current channel length (L), the parallel current channels can act similarly to a conventional linear source-follower having dimensions of 2W and the same L. SGSF implementations can provide a number of features, including higher frame rate, lower power consumption, and lower noise, as compared to those of a conventional source-follower transistor of comparable W and L dimensions.
In various embodiments, image sensors are configured for detecting object distance based on images captured by the image sensors. In those embodiments, parameters within the images are analyzed to determine a distance of the object relative to the image sensors. In some implementations, techniques for distance detecting object distance in accordance with the present disclosure are deployed within a vehicle. In those implementations, the distance sensing in accordance with the present disclosure can be used to aid various driving scenario, such as different levels of autonomous self-driving by the vehicle. In some implementations, the distance sensing can be employed in robotic equipment such as unmanned underwater devices to aid distance sensing of certain underwater objects of interest. In some implementations, the distance sensing can be employed in monitoring or surveillance for detecting or measuring object distance relative to a reference point.
Embodiments of the present application provide a method and system for active noise control, which can meet different needs of different consumers on sound quality of headphones. The method includes: determining an expected noise control curve of performing active noise control on a target object; determining a target filter according to the expected noise control curve and a filter model; and performing noise control processing on an external noise signal using the target filter.
G10K 11/178 - Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
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