Facebook Technologies, LLC

Meta Platforms Technologies, LLC

Apple Inc.

Facebook, Inc.

Omnivision Technologies, Inc.

Dong Yang

Rui Zhang

Fei Liu

Theresa Loney Casarez

Qiang Zhang

Wen Song

Matthew Christopher Appleby

Zheng Yang

Oskar Linde

David Tao

Yuming Liu

Zhenfu Tian

Salvatore Reddiconto

Chao Hu

Janosch Nikolic

Jijie Xu

Kenneth Chi Kin Ng

Steven G McClellan

Samvit Monga

Joern Rehder

Aspects of the present disclosure are directed to systems and methods for controlling light emitting diodes (LEDs) in an electronic device, such as an artificial reality (XR) head-mounted display (HMD) or other XR device in an XR system. In an XR HMD, the LEDs can be positioned proximate to and/or facing the eyes and/or face of a user to illuminate such features for movement tracking and other purposes. Implementations can provide LED control circuitry that can continuously monitor the output current provided to the LEDs. If the integral of the output current over time exceeds a threshold current, implementations can latch the current to the LEDs.

Light emitting diode control circuitry

Image sensors with improved negative pump voltage settling, and circuitry for the same, are disclosed herein. In one embodiment, a power supply settling circuit includes a negative charge pump and a reference voltage generator. An output of the negative charge pump is selectively coupled to a first node of the negative pump settling circuit via a first switch, and an output of the reference voltage generator is selectively coupled to a second node of the negative pump settling circuit via a second switch. The first node is further selectively coupled to ground via a third switch, and the second node is further selectively coupled to ground via a fourth switch. The first node can additionally be coupled to a first pad, and the second node can additionally be coupled to a second pad. The pads can each be coupled to a capacitor, such as an off-chip capacitor.

Image sensors with improved negative pump voltage settling, and circuitry for the same

Aspects of the present disclosure are directed to a multi-sensor don/doff detection system for an artificial reality device headset. The multi-sensor don/doff detection system can use a combination of a proximity sensor, an inertial measurement unit (IMU), and an eye tracking/face tracking (ET/FT) unit to make these determinations. However, when both the ET/FT system and proximity sensor system are active, they can have system coexistence issues. Thus, only one of these systems can be used simultaneously. The multi-sensor don/doff detection system can more accurately identify don events by using input from the proximity sensor and the IMU. The multi-sensor don/doff detection system can also more accurately identify doff events by using input from the IMU and either A) the proximity sensor when the ET/FT system is disabled or B) the ET/FT system when the ET/FT system is enabled.

Artificial reality device headset DONN and DOFF detection

A method of operating a VR or AR head mounted display (HMD) system includes obtaining a video performance parameter for a video signal, selecting a clock frequency for video data transfer within the HMD system based on the video performance parameter, detecting one or more available frequency bands for a wireless data connection between a host device and the HMD system, and selecting a frequency band from the one or more available frequency bands for the wireless data connection, based on a predetermined connection suitability parameter for the one or more available frequency bands and based on the selected clock frequency for video data transfer within the HMD system. The method further includes establishing a wireless connection between the host device and the HMD system over the selected frequency band.

Noise cancellation in a wireless head mounted display

A portable compute case for eyewear devices may include a wireless transceiver and a computation component that includes at least one processor. The portable compute case may be configured to house an eyewear device; establish, using the wireless transceiver, a communicative connection between the portable compute case and the eyewear device; generate, using the computation component, processed sensor data; and transmit, using the wireless transceiver, the processed sensor data to the eyewear device for display by the eyewear device. Various other systems and methods are also disclosed.

Portable compute case for storing and wirelessly communicating with an eyewear device

A calibration system includes a grid assembly, a platform, and a controller. The grid assembly includes at least one planar grid. The platform couples to a device under test (DUT) and move the DUT to a plurality of test positions in accordance with a motion sequence. Each test position is reached by a rotation about at most two different axes, and as the DUT moves through the motion sequence, at least one camera on the DUT captures image information describing portions of the grid assembly and an inertial measurement unit (IMU) on the DUT captures IMU information. The controller determines calibration information for the at least one camera on the DUT and for the IMU based in part on a parameterized model of the motion sequence of the DUT, the captured image information, and the captured IMU information.

Calibration system for concurrent calibration of device sensors

The disclosed apparatus may include (1) at least one light-emitting device, (2) a boost circuit electrically coupled to the light-emitting device, and (3) a microcontroller that (A) receives, from a visual display system, a control signal indicating one or more points in time that the light-emitting device is to illuminate a portion of a visual display and (B) directs, based at least in part on the control signal, the boost circuit to provide a sufficient amount of power to the light-emitting device to enable the light-emitting device to illuminate the portion of the visual display at the points in time. Various other apparatuses, systems, and methods are also disclosed.

Devices, systems, and methods for improving high-power drivers

A head-mounted-display system may include 1) a support assembly and 2) a pair of display assemblies moveably coupled to the support assembly such that the display assemblies are moveable between a plurality of positions corresponding to a plurality of user interpupillary distances, with the pair of display assemblies respectively defining separate viewing regions for a user's right and left eyes. Each of the pair of display assemblies may include a lens and a display screen. The head-mounted-display system may also include a detection subsystem having 1) at least one position sensor and 2) a determination module that determines a positional relationship between the pair of display assemblies based on measurements obtained by the at least one position sensor. Various other methods, systems, and computer-readable media are also disclosed.

Apparatuses, systems, and methods for determining interpupillary distances of head-mounted displays

An optical device includes an optical element. The optical element includes a first surface configured to receive light in a first direction and a second surface that is non-parallel to the first surface. The second surface is configured to transmit a first portion of the light in a second direction that is different from the first direction and internally reflect a second portion of the light that is distinct from the first portion of the light. The optical element further includes a third surface configured to receive the second portion of the light from the second surface and reduce internal reflection of the second portion of the light by the third surface. Also disclosed is a method of steering light by the optical device.

Infrared optical element for proximity sensor system

A proximity sensor system for detecting the presence of an object includes a light emitter configured to project light in a first direction, an optical element configured to steer the light, and a sensor. The optical element has a first surface configured to receive the light from the light emitter and a second surface that is non-parallel to the first surface. The second surface is configured to transmit a first portion of the light in a second direction and internally reflect a second portion of the light from the light emitter. The optical element includes a third surface configured to prevent internal reflection of the second portion of the light by the third surface. The sensor is configured to detect at least a portion of the first portion of the light returned from the object and transmitted through the second surface and the first surface of the optical element.

Proximity sensor system with an infrared optical element

According to some embodiments, a bi-directional converter is configured to operate in a boost mode or a buck mode. The bi-directional converter includes a hysteresis control unit that includes a comparator that can be configured to determine whether the reference voltage has a positive slope or a negative slope in conjunction with the bi-directional converter operating in boost mode or buck mode. In addition, the comparator is configured to compare a fractional load voltage to a reference voltage so that the output load voltage corresponds to the waveform shape of the reference voltage.

Growing community of inventors

Milpitas, CA, United States of America

Dong Yang