Abstract: A display assembly of a head mounted display (HMD) includes a pancake lens display assembly. The pancake display assembly comprises a first lens with a quarter-waveplate and a partially reflective surface, a second lens with a reflective polarizer, and a display. An alignment system positions the first lens relative to the second lens to align the reflective polarizer of the second lens with the quarter-waveplate of the first lens. The alignment system rotates the first lens about an optical axis to position the quarter-waveplate on the first lens such that the quarter-waveplate and the reflective polarizer on the second lens are at an angle where light transmitted through the second lens and then through the first lens is substantially circularly polarized. The alignment system mounts the second lens to the lens housing such that the quarter-waveplate is at the angle relative to the reflective polarizer.

Abstract: The disclosed computer system may include an input module, an autoencoder, and a rendering module. The input module may receive geometry information and images of a subject. The geometry information may be indicative of variation in geometry of the subject over time. Each image may be associated with a respective viewpoint and may include a view-dependent texture map of the subject. The autoencoder may jointly encode texture information and the geometry information to provide a latent vector. The autoencoder may infer, using the latent vector, an inferred geometry and an inferred view-dependent texture of the subject for a predicted viewpoint. The rendering module may be configured to render a reconstructed image of the subject for the predicted viewpoint using the inferred geometry and the inferred view-dependent texture. Various other systems and methods are also disclosed.

Abstract: In one embodiment, a method includes receiving an initial input in a first modality from a first user from a client system associated with the first user, determining one or more intents corresponding to the initial input by an intent-understanding module, generating one or more candidate continuation-inputs based on the one or more intents, where the one or more candidate continuation-inputs are in one or more candidate modalities, respectively, and wherein the candidate modalities are different from the first modality, and sending instructions for presenting one or more suggested inputs corresponding to one or more of the candidate continuation-inputs to the client system.

Abstract: In one example, a method comprises: transmitting a first signal to transfer a first portion of a first charge from a first photodiode to a first charge sensing unit to obtain a first measurement result and transmitting a second signal to transfer a second portion of the first charge from the first photodiode to a second charge sensing unit to obtain a second measurement result. The timing of transmission of the first signal and the second signal are based on the indirect time-of-flight measurement operation. The method further comprises performing the indirect time-of-flight measurement operation based on the first measurement result and the second measurement result; transmitting a third signal to transfer a second charge from a second photodiode to the second charge sensing unit via the first photodiode to obtain a third measurement result; and performing a D sensing operation based on the third measurement result.

Abstract: A focusing lens is configured to focus display light for an eye of a user. A display is configured to emit the display light having an illumination profile that increases in brightness as a distance from a middle of the display increases. The focusing lens is configured to receive the display light and focus the display light as image light that has a brightness profile that has substantially uniform brightness across the image.

Abstract: In one example, a method comprises: receiving programming data; determining, based on the programming data, at least one of: an integration period in which a charge storage unit including a floating drain accumulates charge received from a photodiode, or a number of times of sampling the charge; enabling the photodiode to accumulate residual charge, and to transmit overflow charge to the charge storage unit after the photodiode saturates; controlling the charge storage unit to accumulate at least a part of the overflow charge received from the photodiode within the integration period; controlling a quantizer to sample the at least a part of the overflow charge or the residual charge for the number of times to obtain the number of samples; and controlling the quantizer to quantize the number of samples to generate the number of quantization results.

Abstract: A system includes an eyewear device, and a neckband device. The neckband device includes a power source and a processor communicatively coupled to the eyewear device. The system includes a bracelet device, which includes at least one sensor configured to determine a position signal in response to movement of the user's hand, the bracelet device communicatively coupled to the processor. A display device is configured to present content to a user, and is also configured to couple to and be removable from the eyewear device.

Abstract: This present disclosure describes a system and process for laminating a planar film sheet onto a curved surface of an optical element. One or more cuts to a planar film sheet are determined based in part on a curved surface of an optical element. The planar film sheet is cut along the determined one or more cuts to the planar film sheet to form a lamination sample. And the lamination sample has a plurality of stress relief boundaries that correspond to the determined one or more cuts to the planar film sheet. The lamination sample is laminated to the curved surface of the optical element to form a laminated coating on the optical element. And adjacent stress relief boundaries of the plurality of stress relief boundaries are in contact with each other, such that the laminated coating is a continuous film across the curved surface.

Abstract: The disclosed computer-implemented method may include communicatively coupling a user interface device to a virtual reality device, capturing inputs from a user on the user interface device, displaying, on the virtual reality device, a virtual representation of the captured inputs from the user, and mirroring, on the virtual reality device, content presented on the user interface device. Various other methods, systems, and computer-readable media are also disclosed.

Abstract: Embodiments of a 3D web interaction system are disclosed that allow a user to select a content item from a browser, displayed in an artificial reality environment, and present a corresponding version of the content item in the artificial reality environment. The 3D web interaction system can create the version of the selected content item in different ways depending on whether the selected content item is associated with 3D content and, if so, the type of the associated 3D content. For example, the 3D web interaction system can create and present different versions of the selected content item depending on whether the selected content item is (a) not associated with 3D content, (b) associated with “environment content,” or (c) associated with one or more 3D models.

Abstract: The disclosed microfluidic valves may include a valve body having at least one cavity therein, a gate transmission element separating the cavity into an input gate terminal and an output gate terminal, a gate port configured to convey drive fluid into the input gate terminal, and a fluid channel. The gate transmission element may include a flexible membrane and a plunger coupled to the flexible membrane. The gate transmission element may be configured to move within the cavity to inhibit a subject fluid flow from an inlet port to an outlet port of the fluid channel upon pressurization of the input gate terminal, and to allow subject fluid flow from the inlet port to the outlet port upon depressurization of the input gate terminal. Various other related systems and methods are also disclosed.

Abstract: An artificial reality system is configured to more accurately and efficiently construct a 3D virtual representation of a real-world environment from a set of 2D images. The system identifies points and/or lines within the images that define a plane along an orientation and then performs a planar sweep along a perpendicular path to identify surfaces in which the plane intersects with multiple points. Points that appear to be in the same plane are “collapsed” into a cohesive plane to conserve processing power by estimating and/or storing parameters for the cohesive plane, rather than all of the individual 3D points. In this way, the system also “averages out” random variation in the planar surface that would otherwise result from random noise in the estimation of the individual 3D points. The system may then generate a 3D map from a constrained alignment of all of the identified planes.

Abstract: An artificial reality system is described that renders, presents, and controls user interface elements within an artificial reality environment, and performs actions in response to one or more detected gestures of the user. The artificial reality system includes an image capture device configured to capture image data representative of a physical environment, a head-mounted display (HMD) configured to output artificial reality content, a gesture detector configured to identify, from the image data, a gesture comprising a configuration of a hand that is substantially stationary for at least a threshold period of time and positioned such that a thumb of the hand and at least one other finger form approximately a circle or approximately a circular segment, a user interface (UI) engine to generate a UI element in response to the identified gesture, and a rendering engine to render the UI element as an overlay to the artificial reality content.

Abstract: A system includes a headset to capture sound and a visual signal of a local area including one or more sound sources. The system determines a strength of the audio signal and a portion of the visual signal associated with the audio signal, compares the strengths, selects the weaker signal, and augments the weaker signal. The headset accordingly presents augmented audio-visual content to a user, thereby enhancing the user's perception of the weak signal.

Abstract: A decryption integrated circuit (IC) includes an interface configured to receive an encrypted block of data and a decryption datapath. The decryption datapath has a plurality of computational stages arranged in a pipeline configured to decrypt the encrypted block of data to form a decrypted block of data. A non-linear computational stage included in the pipeline of the decryption datapath includes multiple asymmetric logical paths and multiple bypassable latches. A first signal traverses a first logical path and a second signal traverses a second logical path having a greater number of logical units than the first logical path. Each bypassable latch is positioned in a respective logical path of the multiple asymmetric logical paths. The decryption IC further includes a controller configured to assign an individual random bit sequence to each bypassable latch to randomly activate or randomly disable each bypassable latch of the multiple bypassable latches.

Abstract: A hand interaction system can use a three-state model to differentiate between normal hand movements, such as reaching for an object, and hand input gestures. The three-state model can specify a sequence of states including: 1) a neutral state, 2) a tracking state, and 3) an active state. In the neutral state, the hand interaction system monitors for a gesture signaling a transition to the tracking state but does not otherwise interpret a gesture corresponding to the active state as input. Once a gesture causes a transition to the intermediate tracking state, the hand interaction system can recognize a further active state transition gesture, allowing active state interaction. Thus, the monitoring for the intermediate tracking state provides a gating mechanism, making it less likely that the hand interaction system will interpret hand movements as input when not so intended by the user.

Abstract: A headset includes a tissue transducer on a carriage that translates along a temple portion of the headset. The carriage is configured to contact the helix root of a user's ear. The helix root provides a reference point, and when the carriage is contact with the helix root, the tissue transducer is configured to be located in a target area. By maintaining a fixed location of the tissue transducer relative to the helix root of the user's ear, the tissue transducer may be accurately positioned, even for users with different head shapes and sizes.

Abstract: A tissue conduction audio system includes a transducer that produces vibrations as it presents audio to a user. A vibration isolation system isolates the vibrations produced by the transducer. The vibration isolation system includes a suspension component with flexures that are configured to have an asymmetric spring rate when at rest and a symmetric spring rate when the transducer is in use and/or at a target position.

Abstract: Systems, articles, and methods for improved capacitive electromyography (“EMG”) sensors are described. The improved capacitive EMG sensors include one or more sensor electrode(s) that is/are coated with a protective barrier formed of a material that has a relative permittivity ?r of about 10 or more. The protective barrier shields the sensor electrode(s) from moisture, sweat, skin oils, etc. while advantageously contributing to a large capacitance between the sensor electrode(s) and the user's body. In this way, the improved capacitive EMG sensors provide enhanced robustness against variations in skin and/or environmental conditions. Such improved capacitive EMG sensors are particularly well-suited for use in wearable EMG devices that may be worn by a user for an extended period of time and/or under a variety of skin and/or environmental conditions. A wearable EMG device that provides a component of a human-electronics interface and incorporates such improved capacitive EMG sensors is described.

Abstract: An audio system captures audio data of test sounds through a microphone of a headset worn by a user. The test sounds are played by an external speaker, and the audio data includes audio data captured for different orientations of the headset with respect to the external speaker. A set of head-related transfer function (HRTFs) is calculated based at least in part on the audio data of the test sounds at the different orientations of the headset. A portion of the set of HRTFs is discarded to create an intermediate set of HRTFs. The discarded portion corresponding to one or more distortion regions that are based in part on wearing the headset. One or more HRTFs are generated that correspond to the discarded portion using at least some of the intermediate set of HRTFs to create an individualized set of HRTFs for the user.