Abstract: Apparatuses, methods, and systems for an ocular hydration sensor/reflectometer system in a near-eye display device are described. In one aspect, a near-eye display device may include a projector to project light onto a user's eye, a photodetector to receive reflections from the tear film of the user's eye (e.g., the tear glints), and a controller to make ocular hydration measurements from the received reflections. The ocular hydration measurements may be used to (1) re-calibrate an eye tracking system of the near-eye display device (by changing parameters such as, e.g., light intensity and/or exposure time); (2) prompt the user to take remedial action; and/or (3) keep track of the user's eye health over time. The projector, photodetector, and/or controller may be integrated into, separate from, or partially integrated/partially separate from the eye tracking system.

Abstract: Disclosed herein are systems and method for using a cellular communication chain integrated with RFID wireless communication to communicate with an external RFID tag and a cellular wireless base station. A front end circuit can receive a first RF signal as input and can provide, as output, a processed first RF signal for wireless communication via a cellular network and be a low-band signal. An RFID circuit can generate a second RF signal for wireless communication with an RF identifier tag. A switch circuit or one or more toggle switches can be configured to route the processed first RF signal for transmission via an antenna for the wireless communication via the cellular network and route the second RF signal for transmission via the antenna for the wireless communication with the RF identifier tag.

Abstract: An illumination system for eye tracking is described herein. The illumination system may include a laser light source and an ultra-fast scanning micro-electromechanical system (MEMS) operating at a frequency range from about ten (10) kilohertz (kHz) to about one-hundred (100) kilohertz (kHz) to reflect laser light to the eye and generating a desired fringe pattern controlling intensity and timing. A surface of the MEMS may include diffractive optical element (DOE) to reflect the laser light as a concentrated optical beam. The light may also be projected by grating-based illuminators on a photonic integrated circuit (PIC) controlled through adiabatic couplers projecting multiple binary/grayscale images onto the eye. On the detection side, a 2D single-photon avalanche diode (SPAD) sensor or a SPAD array detector and an active MEMS shutter array may be used. Compressive sensing techniques may be applied on the detection side.

Abstract: Various embodiments set forth eye tracking systems. In some embodiments, an eye tracking system includes a polarization volume hologram (PVH) combiner having a rolling k-vector design that provides relatively wide coverage of users whose eyeglasses prescriptions can vary. The PVH combiner can further include (1) fiducial regions created by differential patterning that generate dark regions in images captured of an eye, and/or (2) multiple regions that diffract light at angles to produce different perspectives in the captured images. The dark regions and/or different perspectives can be used to calibrate eye tracking. In addition, the PVH combiner can include off-axis lens regions that generate glints for the eye tracking.

Abstract: The disclosed system may include a sensor mounting bracket that has various mounting points for different sensors. The sensor mounting bracket may include a center portion and multiple different branches extending from the center portion. The system may also include a printed circuit board that includes antenna feed components. At least one of the branches of the sensor mounting bracket may be modified to form a specific type of antenna. The antenna feed components may be electrically connected to the antenna. Various other mobile electronic devices, apparatuses, and virtual reality headsets are also disclosed.

Abstract: A system for measuring a satellite ghost efficiency of a diffractive lens is provided. The system includes a light source configured to output a first probing beam, and a beam tweaking assembly disposed between the light source and the diffractive lens, and configured to convert the first probing beam into a second probing beam that is a non-collimated beam. The diffractive lens diffracts the second probing beam into a plurality of diffracted beams including a first diffracted beam of a parent diffraction order and a second diffracted beam of a satellite ghost diffraction order. The beam tweaking assembly includes one or more optical lenses, and an adjustable optical power. The system also includes a detector configured to generate a beam spot pattern including a first beam spot corresponding to the first diffracted beam and a second beam spot corresponding to the second diffracted beam.

Abstract: A method implemented by a multi-chip package (MCP) electronic device including a die-to-die (D2D) interface is provided. The method includes receiving, by a receiver portion of a first die of the D2D interface, and from a transmitter portion of a second die of the D2D interface, a first timing signal and a second timing signal. The method includes generating a timing calibration signal based on a timing value corresponding to a midpoint of an estimated margin between overlaying segments of the first timing signal and a timing value corresponding to a delay of a unit delay associated with the receiver portion. The method includes generating an output timing signal based on the timing calibration signal, and selecting a timing delay signal based on the output timing signal and the timing calibration signal. The timing delay signal is selected to reduce a potential glitch power associated with the receiver portion.

Abstract: Aspects of the present disclosure are directed to providing an artificial reality environment with augments and surfaces. An “augment” is a virtual container in 3D space that can include presentation data, context, and logic. An artificial reality system can use augments as the fundamental building block for displaying 2D and 3D models in the artificial reality environment. For example, augments can represent people, places, and things in an artificial reality environment and can respond to a context such as a current display mode, time of day, a type of surface the augment is on, a relationship to other augments, etc. Augments can be on a “surface” that has a layout and properties that cause augments on that surface to display in different ways. Augments and other objects (real or virtual) can also interact, where these interactions can be controlled by rules for the objects evaluated based on information from the shell.

Abstract: One or more shock absorbers may be disposed between the layers of an optical assembly, which may be used in a head-mounted display (HMD) device for the display of augmented and/or virtual reality (AR/VR) content. In one example, an optical component positioned adjacent to a waveguide in the optical assembly may have one or more shock absorbers positioned on the surface which faces the waveguide. The shock absorbers may either touch the surface of the waveguide or may not touch the waveguide but rather have a gap (i.e., a stand-off shock absorber). The shock absorbers may take the form of, e.g., a pillar, a cone, an inverted cone, an inverted pillar, a spring, a double helix, a three-dimensional mesh, a strap, or a high aspect ratio 3D mesh tower.

Abstract: In one embodiment, a computing system accesses a set of 3D locations associated with features in an environment previously captured by a camera from a previous camera pose. The computing system determines a predicted camera pose using the previous camera pose and motion measurements generated using a motion sensor associated with the camera. The computing system projects the set of 3D locations toward the predicted camera pose and onto a 2D image plane associated with the camera. The computing system generates, based on the projected set of 3D locations on the 2D image plane, an activation map specifying a subset of the pixel sensors of the camera that are to be activated. The computing system instructs, using the activation map, the camera to activate the subset of pixel sensors to capture a new image of the environment. The computing system reads pixel values of the new image.

Abstract: A method by a computing system associated with a set of disjoint devices that includes at least one wearable device includes receiving a request to perform a task. The method further includes determining, based on sensor data associated with the set of disjoint devices, a thermal-constraint differential for each device of the set of disjoint devices. The method further includes determining a plurality of workload assignments needed to be performed to accomplish the task. The method further includes distributing, based on the thermal-constraint differentials of the set of disjoint devices, the plurality of workload assignments to one or more devices of the set of disjoint devices to satisfy one or more power or thermal constraints associated with each device of the set of disjoint devices. The method further includes performing the task by causing the one or more devices to execute the distributed plurality of work assignments.

Abstract: In one embodiment, an operating system of a computing system determines, by an application instance manager of the operating system, that a first instance corresponding to a first application is to be activated according to an instance database managed by the operating system, where the first application includes several application components, including the first instance and a presenter. The application instance manager invokes the first instance and the presenter, the presenter being managed by the first instance. The operating system determines that the presenter is configured to present data obtained by a data provider, the data provider being one of several application components of a second application. The data provider accesses data from a data store and populates a dataset defined by the second application. The presenter of the first application generates a user interface to present the data from the dataset defined by the second application.

Abstract: A reflective polarization rotator based on a twisted nematic (TN) liquid crystal (LC) configuration may be optimized for achromatic performance in both bright and dark states by compensating wavelength dependence of polarization transformation by the TN LC layer. At linear achromatic input polarization, the compensation aims to provide a circular achromatic polarization at the reflector, which guarantees the achromaticity of the 90 degrees polarization rotation on double pass. The compensation takes care to preserve linear polarization at the reflector when the LC device is driven to a vertical LC director configuration. Such an approach ensures that the performance of the polarization rotator is achromatic in both driven and undriven states of the LC device.

Abstract: A method to assess user condition for wearable devices using electromagnetic sensors is provided. The method includes receiving a signal from an electromagnetic sensor, the signal being indicative of a health condition of a user of a wearable device, selecting a salient attribute from the signal, and determining, based on the salient attribute, the health condition of the user of the wearable device. A non-transitory, computer-readable medium storing instructions which, when executed by a processor, cause a system to perform the above method, and the system, are also provided.

Abstract: Systems, methods, and devices for managing target wake time (TWT) schedules may include a first device of a wireless local area network (WLAN) which receives information relating to drift of a start time of a target wake time (TWT) schedule from a second device of the WLAN. The first device may modify a start time for a subsequent TWT service period, according to the information relating to the drift of the start time from the second device.

Abstract: Systems, methods, and devices for sharing quality of service (QoS) characteristics may include a first access point (AP) which generates an information element indicating QoS characteristics of a service set (ss) for the first AP. The first AP may transmit the information element to a second AP.

Abstract: Disclosed herein are systems and method for selecting and applying configurations for wireless communications of a UE device based on a location. The system can include a processor to detect a wireless network of an access point (AP) configured to support wireless communication according to a plurality of configurations. The processor can identify, based at least on a plurality of weights for a plurality of modes for geolocation determination, a mode of the plurality of modes corresponding to a weight of the plurality of weights. The processor can determine a geolocation of the AP using the mode and the weight and select, based at least on the geolocation of the AP, a configuration of the plurality of configurations to use for wireless communication with the AP.

Abstract: Systems, methods, and devices for managing target wake time (TWT) schedules may include a first device of a wireless local area network (WLAN) which receives information relating to drift of a start time of a target wake time (TWT) schedule from a second device of the WLAN. The first device may modify a start time for a subsequent TWT service period, according to the information relating to the drift of the start time from the second device.

Abstract: Systems and methods for facilitating coexistence may include a first wireless communication device which transmits a traffic indication packet (TIP) on an advertising channel. The TIP may one or more frequencies and one or more time periods in which the first wireless communication device is to exchange/communicate traffic with a second wireless communication device. The first wireless communication device may transmit traffic to the second wireless communication device, on one or more channels corresponding to the one or more frequencies, during the one or more time periods.