Abstract: Various embodiments disclosed herein describe photonic passive delay lines that have a waveguide wound into a plurality of straight segments and bends. The photonic passive delay lines are configured to reduce losses from parasitic modes of light generated at the bends. Embodiments of the photonic passive delay lines vary the dimensions of the straight segments to provide different amounts of dephasing between a mode of input light received by the photonic passive delay line and one or more parasitic modes.

Abstract: Various embodiments disclosed herein describe optomechanical phase shifters. The optomechanical phase shifters may be configured with an asymmetry that improves the performance of the OM phase shifter as a function of wavelength. In some instances, the optomechanical phase shifter includes a section of a waveguide having an asymmetric cross-sectional shape. In other instances an optomechanical phase shifter is incorporated into a controllable optical switch, such that OM phase shifters may be actuated to selectively route light to different outputs of the controllable optical switch.

Abstract: A user equipment (UE) may detect a collision or interference issues of a second UE and transmit information regarding the detected collision to a base station. The second UE may not able to sense the channel on its own and thus may inadvertently use resources already reserved or in use by other UEs. The information regarding the detected collision may include layer-1 identifiers (L1 IDs) and/or layer-2 identifiers (L2 IDs) corresponding to the UE and/or the second UE as well as additional information corresponding to the resource collision. This information may be usable by the base station in determining that the base station has previously communicated with the second UE and may trigger a resource reselection by the second UE. The UE may receive sidelink communications on one or more reselected sidelink transmission resources from the second UE.

Abstract: An electronic device may include a display, a display driver integrated circuit for controlling the display, and a system processor for running one or more applications on the electronic device. The display may be operated in at least a video mode and a command mode. In the video mode, the system processor operates as the primary timing circuit while the display driver integrated circuit operates as the secondary timing circuit. In the command mode, the display driver integrate circuit operates as the primary timing circuit while the system processor operates as the secondary timing circuit. The system processor may be configured to switch between video mode and the command mode without turning off the electronic device and without turning off the display driver integrated circuit. If desired, the display can be temporarily turned off during a mode switching event to hide potential front of screen artifacts.

Abstract: A lens system provides a zoom function (variable magnification) in a low profile camera (lens system height less than or equal to 6 mm), which may be in a cellular phone. The lens system includes at least three movable lens groups that are movable along a common optical axis. Each of the three movable lens groups is coupled to a corresponding actuator. Responsive to a request to change focal length or magnification, a controller sends a corresponding signal to each of the actuators that move the corresponding lens group by a corresponding distance in a corresponding direction. The various movable lens groups may be moved by different distances and in different directions of movement. An f-number of the lens system is less than f/3.0. Focusing of an image cast onto an image sensor is accomplished by adjusting the position along the optical axis of one of the movable lens groups.

Abstract: An electronic device can include a first group of radio-frequency amplifiers coupled to one or more first antenna(s) disposed at a first end of the device, a second group of radio-frequency amplifiers coupled to one or more second antenna(s) disposed at a second opposing end of the device, a first envelope tracking integrated circuit (ETIC) coupled to the first group of radio-frequency amplifiers, and a second envelope tracking integrated circuit (ETIC) coupled to the second group of radio-frequency amplifiers. The first and second ETICs can be coupled together via a bidirectional input-output voltage path and a feedback voltage path. At least the first ETIC can include a first envelope tracking amplifier, a second envelope tracking amplifier, a voltage converter coupled to an output of the first envelope tracking amplifier, and a feedback controller coupled to an output of the second envelope tracking amplifier and configured to adjust the voltage converter.

Abstract: Methods and apparatus for stray light mitigation in optical systems that include two or more illumination sources (e.g., point light sources such as light-emitting diodes (LEDs)) that illuminate an object to be imaged, and a camera configured to capture images of light from the point light sources reflected by the object when illuminated. To mitigate “occlusions” or artifacts caused by, for example, stray light or reflections of the illumination sources off of other components of the system, multiple images of the object are captured with different groups of the illumination sources enabled. The captured images can then be processed and merged to generate an output image with the occlusions or artifacts caused by stray light or reflections mitigated or eliminated.

Abstract: A computing device can include a system clock and a processor coupled to the system clock. The system clock can be configured to indicate a current time of the computing device that is approximately equal to a real physical time. A time adaption layer can be operated by the processor and include a time simulator to provide a simulated current time that is substantially different from the real physical time. A first program can be operated by the processor based on the current time provided by the system clock at the real physical time. In addition, a second program can be operated based on the simulated current time provided by the time simulator at the same real physical time.

Abstract: A camera includes a base housing an image sensor. The base is adhered to an optics holder that holds optical components of the camera. The optics holder is located in a recess of the base component and includes a horizontal flange extending outward from an upper portion of vertical perimeter walls of the optical components holder. The horizontal flange redirects adhesive horizontally during assembly (may include an active alignment process) of the camera, and the horizontal adhesive adheres the flange to an upper horizontal ledge of the base. An exposed portion of the adhesive between the horizontal flange and the upper horizontal ledge of the base may be cured via ultraviolet light to prevent shifting of the optics holder during transport of the camera to a thermal curing process. A lower portion of a vertical interior wall of the base may include another ledge that redirects adhesive during assembly.

Abstract: Methods and apparatus for correcting the gaze direction and the origin (entrance pupil) in gaze tracking systems. During enrollment after an eye model is obtained, the pose of the eye when looking at a target prompt is determined. This information is used to estimate the true visual axis of the eye. The visual axis may then be used to correct the point of view (PoV) with respect to the display during use. If a clip-on lens is present, a corrected gaze axis may be calculated based on the known optical characteristics and pose of the clip-on lens. A clip-on corrected entrance pupil may then be estimated by firing two or more virtual rays through the clip-on lens to determine the intersection between the rays and the corrected gaze axis.

Abstract: Methods and apparatus for generating user-aware eye models. During an enrollment process, images of a user's eye are captured by one or more cameras when the eye is in two or more different orientations and at two or more different levels of display brightness. The captured images are processed to generate a 3-dimensional, user-aware eye model, for example a model of at least the eye's cornea and pupil features. The generated user-aware eye model may be used in other processes, for example in a gaze tracking process. The enrollment process may be an iterative process to optimize the eye model, or a continuous process performed while the user is using the system.

Abstract: Systems and methods are disclosed to enable detection of excessive contact lens shift in a head-mounted display (HMD) device that implement gaze tracking for the user. In embodiments, during a user enrollment process to calibrate the gaze tracking system, the HMD device analyzes key frames of the eye to estimate a first center location of the eye based on detected eye features such as the pupil, the iris, or the limbus, and a second center location of the eye based on the shape of the detected cornea. Shift vectors are generated based on the two center locations for individual key frames. If the standard deviation of the vectors' magnitudes exceeds a specified threshold, excessive lens shift is detected. In response to detection of excessive contact lens shift, the HMD device may generate a notification to the user or activate compensation mechanisms.

Abstract: In at least one example of the present disclosure, a head-mountable device includes a display, a frame at least partially surrounding the display, a facial interface attached to the frame, a cover disposed around the facial interface, and a touch sensitive surface incorporated into the cover to receive input from a user for the head-mountable device.

Abstract: A decoding computing device receives a bit stream for compressed 3D volumetric content. The bit stream includes video encoded image frames comprising packed attribute patch images and depth maps for the 3D volumetric content. Instead of generating a mesh having a vertex for each depth value signaled in the depth map, the decoder performs a real-time mesh simplification process to reduce a resolution of the mesh, such that the mesh resolution is reduced without exceeding an error threshold, which may be dynamically determined. Additionally, the decoder may perform a re-meshing of particular regions of the mesh for the 3D volumetric content to avoid cracks or gaps.

Abstract: A system may include an electronic display panel having pixels, where each pixel may emit light based on a respective programming signal. The system may include a memory storing a map. The processing circuitry may determine a function for each pixel from the map. The processing circuitry may determine a respective control signal based on the function and a target brightness level for each pixel to generate multiple control signals, where the respective control signal is used to generate the respective programming signal for each pixel. The processing circuitry may determine a scaling factor based at least in part on the first map and may scale at least a subset of the multiple control signals based at least in part on the scaling factor.

Abstract: Embodiments of a User Equipment (UE) to support dual-connectivity with a Master Evolved Node-B (MeNB) and a Secondary eNB (SeNB) are disclosed herein. The UE may receive downlink traffic packets from the MeNB and from the SeNB as part of a split data radio bearer (DRB). At least a portion of control functionality for the split DRB may be performed at each of the MeNB and the SeNB. The UE may receive an uplink eNB indicator for an uplink eNB to which the UE is to transmit uplink traffic packets as part of the split DRB. Based at least partly on the uplink eNB indicator, the UE may transmit uplink traffic packets to the uplink eNB as part of the split DRB. The uplink eNB may be selected from a group that includes the MeNB and the SeNB.

Abstract: Various embodiments include a tilt actuator and a spring suspension arrangement for use in a camera having a folded optics arrangement. In some embodiments, the folded optics arrangement may include a light path-folding element that is coupled with a carrier and that is tilted using the tilt actuator. The spring suspension arrangement may suspend the carrier and the light path-folding element from a base structure, and may allow motion of the light path-folding element enabled by the tilt actuator. The spring suspension arrangement may include one or more springs attached to the carrier and to the base structure. In some embodiments, the spring suspension arrangement may further include one or more suspension wires attached to the spring(s) and to a stationary structure of the camera.