Abstract: An optical element includes a first layer, a second layer, and a fluid. A first surface of the first layer is configured to change hydrophobicity in response to incoming activation light. Absorbing molecules in the fluid are repelled or attracted to the first surface in response to the hydrophobicity of the first surface.

Abstract: A device may include a first ultra-wideband (UWB) antenna and one or more processors. The one or more processors may be configured to establish a plurality of respective connections with a plurality of second devices each having a respective UWB antenna. The device may identify an interference condition for at least one of the plurality of connections. The device may update a configuration for traffic sent via the at least one of the plurality of connections according to the identified interference condition, and can transmit a first packet to one of the plurality of second devices according to the updated configuration.

Abstract: Three-dimensional integrated circuit component(s) are described including a System-on-a-Chip (SoC) die and a separate static random-access memory (SRAM) subcomponent in a vertically stacked arrangement. Such stacked SoC/SRAM integrated circuit components may form part of a system to render artificial reality images.

Abstract: Systems and methods for angle of arrival determination in wireless devices include one or more processors which determine a first angle of arrival (AoA) and a first distance between a user device and an anchor device at a first time instance, according to first measurements between a single ultra-wideband (UWB) antenna of the user device and a plurality of UWB antennas of the anchor device. The processor(s) may determine a second AoA and a second distance between the user device and the anchor device at a second time instance, according to second measurements between the single UWB antenna of the user device and the plurality of UWB antennas of the anchor device. The processor(s) may determine a direction of movement of the user device relative to the anchor device, according to the first AoA, the first distance, the second AoA, and the second distance.

Abstract: An optical system includes an illumination layer, an optical combiner, and an active optics block. The illumination layer includes an array of point light sources configured to emit calibration light. The optical combiner is configured to pass visible light to a front side of the optical system and to direct the calibration light to a camera that generates an image in response to the calibration light. The image includes an array of points corresponding to the array of point light sources. The active optics block includes an adjustable lens disposed between the illumination layer and the optical combiner and is configured to pass the calibration light to the optical combiner and to focus the visible light. The active optics block is further configured to adjust an optical power of the adjustable lens based on the image of the array of points.

Abstract: A pupil-replicating lightguide includes a slab of transparent material, a switchable out-coupling grating for out-coupling portions of image light to propagate towards an eyebox, and a switchable tracking grating for redirecting tracking light carrying an eye image towards an eye tracking camera. One of the two gratings may be turned ON while the other is turned OFF, in a time-sequential manner, allowing the combined use of the pupil-replicating lightguide for carrying image light and eye tracking light.

Abstract: The disclosed adjustable strap apparatus may include a left strap having a first rack member and a right strap having a second rack member. An electrical unit may have an opening through which a shaft passes. A pinion member may be affixed to a proximal end of the shaft and may be adapted to (a) engage the first rack member and the second rack member and (b) translate the first rack member and the second rack member in opposite directions via rotation of the shaft. A ratcheting member may be coupled to a distal end of the shaft and may include one or more pawls adapted to prevent rotation of the shaft when engaged. Various other methods, systems, and devices are also disclosed.

Abstract: Disclosed herein are related to a system and a method for providing an artificial reality. In one aspect, a system includes a shared physical memory and a first processor having access to the shared physical memory. In one aspect, the first processor performs, during a first time period, a first rendering process to generate a first image frame of a first view of an artificial reality. In one aspect, the first processor performs, during a second time period, a second rendering process to generate a second image frame of a second view of the artificial reality. In one aspect, the system includes a second processor including a neural network and having access to the shared physical memory. In one aspect, the second processor performs, during a third time period overlapping a portion of the second time period, an image enhancing process on the first image frame.

Abstract: An apparatus for sleep tracking may include (i) a sensor that detects whether a wearable device is being worn by a user, (ii) a mode-switching module that switches the wearable device between an active mode when the sensor detects that the wearable device is being worn by the user and a sleep-tracking mode when the sensor detects that the wearable device is not being worn by the user, (iii) a detector that, when the wearable device is in the sleep-tracking mode, detects signals associated with sleep behavior of the user, and (iv) a sleep-tracking module that, when the wearable device is in the sleep-tracking mode, monitors the user's sleep based at least in part on an evaluation of the signals associated with the sleep behavior of the user. Various other methods, systems, and computer-readable media are also disclosed.

Abstract: The disclosed system may include a housing dimensioned to secure various components including at least one physical processor and various sensors. The system may also include a camera mounted to the housing, as well as physical memory with computer-executable instructions that, when executed by the physical processor, cause the physical processor to: acquire images of a surrounding environment using the camera mounted to the housing, identify features of the surrounding environment from the acquired images, generate a map using the features identified from the acquired images, access sensor data generated by the sensors, and determine a current pose of the system in the surrounding environment based on the features in the generated map and the accessed sensor data. Various other methods, apparatuses, and computer-readable media are also disclosed.

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: According to examples, a tunable visible light source may include a periodically poled lithium niobate (PPLN) waveguide and a control mechanism to optimize the phase-matching of the PPLN waveguide in response to an input signal with a varied wavelength. The control mechanism may include an electro-optic (EO) tuning mechanism, a microheater-based thermo-optic (TO) control mechanism, and/or an acousto-optic (AO) control mechanism. The control mechanisms may, respectively, generate an electric field, heat, or an acoustic wave to affect a change in refractive index of the PPLN waveguide and thereby optimize the conversion efficiency to maximize the output power of the output wavelength of the PPLN waveguide as the input wavelength is tuned.

Abstract: Provided is a method of estimating temperature in a device including a main printed circuit board (PCB), a protection and control module (PCM), and one or more batteries electrically connected to the PCM. The method includes sensing a temperature of the PCB, via a PCB temperature sensor and sensing a temperature of the PCM via a PCM temperature sensor. The method also includes estimating a temperature of at least one of the batteries based on (i) the temperature determined via the PCB temperature sensor and (ii) the temperature determined via the PCM temperature sensor.

Abstract: A method for providing imagery to a user on a display includes receiving eye tracking data, and defining a first tile using the eye tracking data. The first tile has dimensions determined using the eye tracking data. The method also includes defining multiple additional tiles to fill a surrounding area of the display. The method also includes providing a portion of an image using the first tile at a first image quality and providing another portion of the image at a second image quality using at least one of the multiple additional tiles.

Abstract: In one embodiment, one or more computing systems may access a plurality of images corresponding to a portion of a face of a user. The plurality of images is captured from different viewpoints by a plurality of cameras coupled to an artificial-reality system worn by the user. The one or more computing systems may synthesize, using a machine-learning model, to generate a synthesized image corresponding to the portion of the face of the user. The one or more computing systems may access a three-dimensional (3D) facial model representative of the face of the user and generate a texture image by projecting the synthesized image onto the 3D facial model from a specific camera pose. The one or more computing systems may cause an output image of a facial representation of the user to be rendered using at least the 3D facial model and the texture image.

Abstract: An audio system is described for calibrating one or more transducers for a user using the auditory steady state response (ASSR) of the user. The audio system presents an audio calibration signal to the user via a transducer array in the headset. The system measures electrical signals that are generated in the auditory cortex of the brain of the user in response to the presented audio calibration signal. The audio system determines an ASSR of the user based on the measured electrical signals. The audio system determines a value for one or more sound filter parameter based on the determined ASSR and a model. The audio system calibrates the transducer array using the determined sound filter parameters. The calibrated transducer array is used to present audio content to the user.

Abstract: Disclosed herein are related to dynamically adjusting a wake time and a sleep time for wireless communication between two or more devices to reduce power consumption. In one aspect, a first device enters a wake up state to wirelessly communicate with a second device for a service period with a determined duration scheduled according to a target wake time (TWT) protocol. In one aspect, the first device monitors for one or more indicators from the second device indicating that additional data is available for communication. In one aspect, the first device extends the service period beyond the determined duration, in response to receiving a first indicator of the one or more indicators. In one aspect, the first device communicates with the second device the additional data during the service period extended beyond the determined duration.

Abstract: Disclosed herein are related to a system and a method of coordinating among artificial reality links. In one approach, a system comprising a first console for executing an application for artificial reality may include a wireless communication interface and a processor. The processor may be configured to send, via the wireless communication interface, a first message comprising a first plurality of parameters and a first schedule for access to a shared wireless channel by the first console, receive, from a second console via the wireless communication interface, a second message comprising a second plurality of parameters and a second schedule for access to the shared wireless channel by the second console, update, responsive to the second message, the first plurality of parameters and the first schedule, and/or send, via the wireless communication interface, a third message comprising the updated first plurality of parameters and the updated first schedule.

Abstract: Disclosed herein are related to a co-existence of wireless communications over different protocols. In one aspect, two devices may communicate with each other through a wireless link. The two devices may communicate latency sensitive data (e.g., artificial reality data) through one or more frequency bands, according to a first wireless communication protocol. Meanwhile, another device in the vicinity may communicate or attempt to communicate through a portion of the one or more frequency bands, according to a second wireless communication protocol. In one aspect, a frequency band, transmission power, and/or duty cycle of transmission of the another device for communication over the second communication protocol and can set or controlled, to avoid interfering with the communication over the first communication protocol.

Abstract: In some examples, an article comprises a semiconductor including at least one integrated circuit and an inorganic semiconductor layer bonded to a first surface of the semiconductor. The inorganic semiconductor layer comprises a ?LED array, and the first surface of the semiconductor extends beyond a first edge of the inorganic semiconductor layer. The first edge of the inorganic semiconductor layer is oriented substantially perpendicular to the first surface of the semiconductor.