A lamp is formed of a lamp capsule sealed with a press seal penetrated by electrical lead-ins, the lamp being received in an insulating base that has external electrical pins. Power leads interconnect respective capsule lead-ins and base pins. Power leads are formed of stranded wire having a plurality of intertwined strands.
H01H 85/00 - Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
2.
METHODS, SYSTEMS, AND APPARATUS FOR PROVIDING VARIABLE ILLUMINATION
Digital Control Ready (DCR) is a two-way open standard for controlling and managing next- generation fixtures. A DCR-enabled lighting fixture responds to digital control signals from a separate digital light agent (DLA) instead of analog dimming signals, eliminating the need for digital-to-analog signal conditioning, fixture-to-fixture variations in response, and calibration specific to each fixture. In addition, a DCR-enabled lighting fixture may also report its power consumption, measured light output, measured color temperature, temperature, and/or other operating parameters to the DLA via the same bidirectional data link that carries the digital control signals to the fixture. The DLA processes these signals in a feedback loop to implement more precise lighting control. The DCR-enabled lighting fixture also transforms AC power to DC power and supplies (and measures) DC power to the DLA via a DCR interface. These features enable intelligent, networked DCR lighting systems operate with lower power (energy) consumption, greater flexibility, and simpler installation than other intelligent lighting networks.
An ambient light sensor measures an ambient light level at one point in an illuminated environment, such as a warehouse, office, shop, cold-storage facility, or industrial facility, and provides an indication of the measured ambient light level to a processor. The processor maps the measured ambient light level to an estimated ambient light level at a different point in the illuminated environment from the measured ambient light level (e.g., a "task height" about three feet from a warehouse floor). The processor may determine the difference between the estimated ambient light level and a desired light level at the task height, and may change the artificial illumination provided by a light fixture to make the actual ambient light level at task height match the desired light level at the task height.
Systems, methods, and computer program products for remote configuration of one or more power supplies, particularly lighting power supplies, are disclosed. A configuration signal that includes a setting for a parameter is generated and then transmitted to a power supply. The power supply decodes the configuration signal and, if one or more certain conditions are met, configures the power supply according to information provided in the configuration signal.
A presence and an absence of a person or object of interest (an "occupant") is detected, and an occupancy sensor signal is generated indicating an active state In which the presence of the occupant is detected, and an inactive state in which the absence of the occupant is delected. An ambient light sensor detects the ambient light level and generates an ambient light sensor signal indicating the ambient light level. Dimmable illumination is generated at a first level, based on the ambient light level, corresponding to the active state and a second level corresponding to the inactive state. A transition delay time between an onset of the inactive state and a transition between the first dimming level and the second dimming level may be controlled. The first dimming level, the second dimming level, and/or the transition delay time may be variably set or controlled locally or via a remote device.
Embodiments of the present invention include an occupancy sensing unit configured to monitor an environment illuminated by a lighting fixture. An inventive occupancy sensing unit may include an occupancy sensor to detect radiation indicative of at least one occupancy event in the environment illuminated by the lighting fixture according to sensing parameters. The occupancy sensor can be coupled to a memory that logs sensor data, which represent the occupancy events, provided by the occupancy sensor. A processor coupled to the memory performs an analysis of the sensor data logged in the memory and adjusts the sensing parameters of the occupancy sensor based on the analysis.
A dual voltage and current control feedback control loop for an optical sensor system. A power supply provides a regulated DC voltage. A current source receives the regulated DC voltage and provides switched current to a light source. A cur-rent feedback representative of the current to the light source is provided to the power supply on a feedback path when the current source is driving the light source. A voltage feedback representative of the DC voltage is provided to the power supply on the feedback path when the current source is not driving the light source.
A current source circuit to drive a light source in an optical sensor system is disclosed. The current source includes an inductor connected in series with a resistor, and a diode coupled in parallel with the inductor and resistor. The current source is configured to receive a regulated direct current (DC) voltage and to provide the current through the inductor to the light source when a switch is closed, and to divert current through the inductor to the diode when the switch is open.
An optical sensor system having a light source comprising a plurality of series connected light emitting diodes (LEDs). The series connected LEDs may be switched at a predetermined frequency.
A high voltage supply circuit to drive a light source in an optical sensor system. The high voltage supply provides a high voltage output to the light source during the start of an on time for the light source to decrease current rise time through the light source. After the start of the light source on time, the high voltage output is disconnected from the circuit and a current source provides current output to the light source to drive the light source during the remainder of the light source on time.
A lamp including a two-sided source plate, a plural-ity of light sources, a lens, a diffuser plate, and a driver insulator is disclosed. One set of the light sources generates white light and is attached to one side of the source plate. Another set of the light sources generates colored light and is attached to the source plate's other side. The lens encapsulates the white light-generating set, and redirects that white light. The driver insulator and the diffuser plate are each in contact with the source plate's other side. The driver in-sulator, diffuser plate, and that side of the source plate define a light box region that contains the colored light-generating set of light sources. The driver insulator acts as a reflector, and the diffus-er plate acts as a diffuser, such that colored light is dispersed from the light box region through the diffuser plate.
F21K 9/23 - Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
F21V 29/70 - Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
F21V 5/04 - Refractors for light sources of lens shape
F21V 23/04 - Arrangement of electric circuit elements in or on lighting devices the elements being switches
A control circuit used in a lamp system. The lamp system has a first and a second light emitting diode (LED) connected together in series. The control circuit includes a current source for connecting to the first LED to provide a regulated drive current to the first and second LEDs in order to illuminate the LEDs. The control circuit includes a switching component for connecting in parallel with the first LED to divert the driver current from the first LED and provide the driver current to the second LED when the switching component is activated. The control circuit includes a controller for selectively activating the switching component in order to selectively extinguish the first LED.
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
13.
LIGHT EMITTING DIODE-BASED LAMP HAVING A VOLUME SCATTERING ELEMENT
A lamp having a candle-like appearance and using one or more light-emitting diodes (LEDs) as its light source. Light is emitted from only a small volume at or near the bulb's center. Heat sink and control elec-tronics are outside the bulb. Inside the bulb, a set of secondary optics guides light to an emission point at a prescribed location in the bulb's inte-rior. The secondary optics include a light pipe that guides light away from an LED chip, and a volume scattering element, made from a transparent base material and including transparent particles of a predetermined size and refractive index, that receives light from the light pipe, scattering it. The density of particles in the volume scattering element, the particle size, and the particle refractive index are chosen to produce a scattering pattern that directs more light toward the bulb's base, while maintaining reasonable efficiency.
F21K 9/61 - Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using light guides
F21V 29/70 - Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
F21K 9/64 - Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
F21V 3/04 - Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
A lighting module comprising a base panel and a plurality of light-emitting diode (LED) chips attached directly to the base panel. The LED chips are in electrical communication with conductive traces on the base panel, which deliver a current to the LED chips. Various embodiments of this generally described lighting module are also presented. Additionally, methods of preparing such a lighting module, and system components of the lighting module are presented.
In embodiments of the present invention, a method and system is provided for designing improved intelligent, LED-based lighting systems. The LED based lighting systems may include fixtures with one or more of rotatable LED light bars, integrated sensors, onboard intelligence to receive signals from the LED light bars and control the LED light bars, and a mesh network connectivity to other fixtures.
F21V 29/76 - Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
H05B 45/10 - Controlling the intensity of the light
H05B 45/40 - Circuit arrangements for operating light-emitting diodes [LED] - Details of LED load circuits
H05B 47/105 - Controlling the light source in response to determined parameters
H05B 47/155 - Coordinated control of two or more light sources
H05B 47/175 - Controlling the light source by remote control
F21S 9/02 - Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply the power supply being a battery or accumulator
F21V 23/04 - Arrangement of electric circuit elements in or on lighting devices the elements being switches
H02J 13/00 - Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
An assembly (10) comprises a receptacle (12) having a base (14) including a longitudinal row (16) of male connector pins (18) extending above and below the base. A first wall (20) projects above the base (14), the first wall (20) having a given height (H) and a given width (W) and being spaced a given distance (D) from the longitudinal row (16) of male connector pins (18). A second wall (22) is spaced from the first wall (20) and also projects above the base (14). The second wall (22) has a height (H1) substantially equal to the given height (H) and a width (W1) different from the given width (W) and being spaced from the longitudinal row (16) of connector pins (18) a distance (D1) different from the given distance (D). A connector (24) has a central body (26) formed to fit between the first and second walls (20, 22). The central body (26) includes a longitudinal row (28) of female connector pins (30) formed to engage the male connector pins (18). The pins (30) can terminate in male ends (30a) if desired. The central body (26) includes two oppositely disposed recesses (32, 34). A first of the recesses (32) is formed to engage the first wall (20) and a second of the recesses (34) is formed to engage the second wall (22). Accurate positioning of the connector with the receptacle is insured by the plural asymmetries developed by the varying distances (D) and (D1) and the varying widths (W) and (W1) of the first and second walls (20, 22). To insure positive retention of the parts, the assembly (10) is provided with a latching feature. To achieve latching, one of the walls, for example, first wall (20), is provided with a latch receiver (36) in the form of an aperture (36a) and one of the recesses, for example, recess (32), is provided with a latch (38), which can be in the form of a projection (38a).
A vehicle lighting system receives power from a power supply and includes a lighting control module, a lamp, and a ballast having a bias control circuit. The lighting control module provides a remote enable signal to the ballast in response to an input. The bias control circuit of the ballast receives a supply voltage from a power supply and the remote enable signal and selectively energizes a bias regulator circuit of the ballast as a function of the remote enable signal. When the bias regulator circuit is energized, a controller of the ballast operates the ballast to provide power from the power supply to the lamp.
B60Q 1/04 - Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
18.
LAMP WITH LENS LENTICULE PATTERN BASED ON THE GOLDEN RATIO
A lens with lenticules arranged in a spiral pattern is described. In polar coordinates the centers of successive lenticules are radially and angularly spaced by spacing factors including Phi, the conjugate of the Golden Ratio. The resulting spiraling lenticule pattern is free of internal harmonics that lead to striation patterns in the lens refracted light. At the same time the size of the beam spot can be set by reflector size and lenticule profile.
An arc discharge lamp (60) contains an arc tube (62) containing an arc generating and sustaining medium. The arc tube (62) has at least one press seal (64). Means (66) for coupling electrical energy to the interior of the arc tube includes an electrical current-carrying frame member (68) and in-leads (68a) and (68b) sealed into the lamp stem (90) and connected to a base (not shown). A starting source (70) comprises a sealed cavity (72) formed in the press seal (64). A second fill material is contained within the sealed cavity (72). The starting source (70) emits ultraviolet radiation when the lamp (60) is energized, which assists in initiation of the arc discharge within the interior of the arc tube (62). An electrical energy coupler (74) is provided for coupling electrical energy to the sealed cavity (72). The electrical energy coupler (74) comprises an electrically conducting element (76) having a proximal end (78) affixed to the electrical current-carrying frame (68) and a distal end (80) overlying the starting source (70), thus providing a capacitve coupling.
An more efficient or higher luminance LED assembly may be formed from a high power LED chip having a first surface, and a second surface, the first surface being mounted to a substrate; the second surface being in intimate thermal contact with a light transmissive heat sink having a thermal conductivity greater than 30 watts per meter-Kelvin. The LED chip is otherwise in electrical contact with at least a first electrical connection and a second electrical connection for powering the LED chip. Providing light transmissive heat sink can double the heat conduction from the LED dies thereby increasing life, or efficiency or luminance or a balance of the three.
A lamp envelope is provided with an alumina layer and a multilayer phosphor coating on the alumina layer. The phosphor coating includes a top phosphor layer with a first weight percent of rare earth activators and a middle phosphor layer with a second weight percent of rare earth activators. The second weight percent is less than the first weight percent so that a total amount of the activators in the coating is reduced while maintaining a required lamp brightness and color rendering index (CRI). Preferably, the second weight percent is about 50-60% of the first weight percent and the middle layer is about 30-50% of a total weight of the coating so that a total weight of the activators in the coating is no more than about 80% of a weight of the activators in the coating if the first and second weight percents were the same.
An LED light source has a housing with a hollow projecting core. The core is arrayed about a longitudinal axis. A printed circuit board closes an open end of the housing at a core end and has LEDs operatively fixed about the center thereof. A light guide with a wall thickness T is positioned in the core and has a first end in operative relationship with the plurality of LEDs and a second end projecting beyond the hollow core. A first reflector is attached to the second end of the light guide. The housing is thermally conductive to form an extended and integral heat sink and has an extended body-part that preferably is provided with heat-radiating fins. A preferred material for the housing is thermally conductive plastic. The printed circuit board has a thermally conducive base that is in direct contact with the housing via an upstanding V- shaped rim.
F21V 29/74 - Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
F21V 29/77 - Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section
F21K 9/00 - Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
F21K 9/61 - Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using light guides
F21S 41/151 - Light emitting diodes [LED] arranged in one or more lines
F21S 45/48 - Passive cooling, e.g. using fins, thermal conductive elements or openings with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device
An LED lamp (10) having a substantially concave heat sink (12) having a raised, frusto-conical center (14) surrounded by an outer rim (16). The heat sink (12) is preferably aluminum or other metal and at least the frusto-conical center preferably has a reflective coating. To further aid in heat removal the outer rim (16) can be provided with a plurality of apertures (16a). A side-emitting LED (18) is mounted on the frusto-conical center (14). A cover (26) is fixed to the outer surface (22) and defines a volume (28) between the frusto-conical center (14) and the cover (26). A circuit (30) is located within the volume (28) and an electrical connection (32) provides connection to the LED (18). In another embodiment a cover (26a) is provided with studs (54) and a reflector (42a) is provided with studs (56) that engage barbs (50) formed in a heat sink (12a).
F21K 9/00 - Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
F21S 43/30 - Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
F21S 45/47 - Passive cooling, e.g. using fins, thermal conductive elements or openings
H05B 45/00 - Circuit arrangements for operating light-emitting diodes [LED]
patents
