Abrégé

Disclosed herein are systems, methods, and computer programs that involve utilizing video cameras along with head-mounted devices, such as photosensor-oculography (PSOG) devices, which measure eye positions. The eye positions are utilized in a variety of ways to implement novel forms of efficient eye tracking. Making eye tracking more efficient be important for many applications, including untethered head-mounted systems, such as systems with augmented reality and/or virtual reality head-mounted displays (HMDs).

Classes IPC  ?

• G06F 3/01 - Dispositions d'entrée ou dispositions d'entrée et de sortie combinées pour l'interaction entre l'utilisateur et le calculateur
• G02B 27/01 - Dispositifs d'affichage "tête haute"

Abrégé

Improvements to capturing and analysis of imaging photoplethysmogram signals (iPPG signals). One approach to saving power involved in obtaining iPPG signals described herein, involves head-mounted cameras that utilize an image sensor that supports changing of its region of interest. This enables evaluation of different windows in the images to determine which one or more windows provide iPPG signals of a desired quality, and selective reading of those one or more windows. Another approach to saving power involves utilizing measurements of cardiac activity taken with a contact sensor in order to identify which portions of the iPPG signals are expected to be more informative, and asynchronous capturing of images with a camera at those times. This disclosure also describes an approach to improving iPPG signal quality by suppressing effects surface reflection (which introduce noise to the iPPG signals) by using multiple illumination directions.

Classes IPC  ?

• A61B 5/024 - Mesure du pouls ou des pulsations cardiaques
• A61B 5/00 - Mesure servant à établir un diagnostic ; Identification des individus

Abrégé

Some aspects of this disclosure involve utilization of wearables, such as smartglasses with embedded sensors, in order to monitor users' health and manage access to locations in a safe manner that can reduce the risk of spreading diseases like the flu or COVID-19.

Classes IPC  ?

• G08B 21/04 - Alarmes pour assurer la sécurité des personnes réagissant à la non-activité, p.ex. de personnes âgées
• G07C 9/00 - Enregistrement de l’entrée ou de la sortie d'une entité isolée
• A61B 5/00 - Mesure servant à établir un diagnostic ; Identification des individus
• A61B 5/01 - Mesure de la température de parties du corps
• A61B 5/024 - Mesure du pouls ou des pulsations cardiaques

Abrégé

Some aspects of this disclosure involve head-mounted systems, such as smartglasses, configured to perform one or more of the following: utilize correlations between PPG signals and iPPG signals to improve detection of physiological responses, monitor blood glucose level, detect fever from images and temperatures, detect congestive heart failure, detect respiratory tract infection based on changes in coughing sounds, and enable adjustment of the smartglasses' frame to improve the smartglasses' fit.

Classes IPC  ?

• A61B 5/00 - Mesure servant à établir un diagnostic ; Identification des individus
• A61B 5/01 - Mesure de la température de parties du corps
• A61B 5/0205 - Evaluation simultanée de l'état cardio-vasculaire et de l'état d'autres parties du corps, p.ex. de l'état cardiaque et respiratoire
• A61B 5/1455 - Mesure des caractéristiques du sang in vivo, p.ex. de la concentration des gaz dans le sang, de la valeur du pH du sang en utilisant des capteurs optiques, p.ex. des oxymètres à photométrie spectrale

Abrégé

Some aspects of this disclosure involve head-mounted systems that are utilized to take thermal measurements of a user's face to detect various physiological responses, such as an allergic reaction, stress, a headache, a stroke, to name a few. Typically, these systems involve one or more head-mounted thermal cameras that may be physically coupled to a frame worn on the user's head and are utilized to take thermal measurements of one or more regions of interest (ROIs). Some of the systems described in this disclosure are intended for "real world", uncontrolled day-to-day use, in which detection of the physiological response may be hampered by "confounding factors". A confounding factor can be a cause of warming and/or cooling of certain ROIs the face, which is unrelated to a physiological response being detected, and as such, can reduce the accuracy of the detection of the physiological response.

Classes IPC  ?

• A61B 5/00 - Mesure servant à établir un diagnostic ; Identification des individus
• A61B 5/01 - Mesure de la température de parties du corps

Abrégé

Collecting thermal measurements of various regions on a user's face can have many health-related (and other) applications. However, movements of the user and/or of the user's head can make acquiring this data difficult with many of the known approaches. Some embodiments described herein utilize various combinations of head-mounted thermal cameras, which may be physically coupled to a frame of a head-mounted system (HMS), in order to collect the thermal measurements. In one embodiment, the thermal measurements are utilized by a computer to detect a physiological response such as stress, an allergic reaction, a headache, a stroke, or an expression of a certain emotion (e.g., joy, fear, sadness, or anger).

Classes IPC  ?

• A61B 5/00 - Mesure servant à établir un diagnostic ; Identification des individus
• A61B 5/01 - Mesure de la température de parties du corps
• A61B 5/16 - Dispositifs pour la psychotechnie; Test des temps de réaction

Abrégé

Described herein are various embodiments of wearable systems that collect thermal measurements related to respiration and/or brain activity. The systems may optionally include a frame that is worn on a user's head, and at least one non-contact thermal camera that is physically coupled to the frame and located close to the user's face. In one embodiment, each thermal camera takes thermal measurements of at least one of: a portion of the right side of the user's upper lip, a portion of the left side of the user's upper lip, and a portion of the user's mouth. The thermal measurements used by a computer to calculate breathing related parameters, such as breathing rate, an extent to which the breathing was done through the mouth/nostrils, and ratio between exhaling and inhaling durations. In another embodiment, a thermal camera takes measurements of the forehead, which are indicative of brain activity of the user.

Classes IPC  ?

• A61B 5/00 - Mesure servant à établir un diagnostic ; Identification des individus
• A61B 5/01 - Mesure de la température de parties du corps
• A61B 5/08 - Dispositifs de mesure pour examiner les organes respiratoires