Apple Inc.

Meta Platforms Technologies, LLC

Nvidia Corporation

Synopsys, Inc.

Facebook Technologies, LLC

Genesis Microchip Corporation

Cagent Technologies, Inc.

Sandro Hermann Pintz

Paolo Sacchetto

Christopher P Tann

Marc Albrecht

Fenghua Zheng

Chaohao Wang

David S Zalatimo

Taesung Kim

Afsoon Jamali

David W Lum

Guy Cote

Changwon Jang

Jason N Gomez

Christopher Philip Alan Tann

Brijesh Tripathi

Hao Nan

James Aamold

Prasanna Nambi

Zhibing Ge

Gabriel G Marcu

Howard H Tang

Satish S Iyengar

Jun Qi

Kurt Jenkins

Lu Zhang

Ulrich Tobias Barnhoefer

James E C Brown

Hopil Bae

Keith Alan Cox

Kingsuk Brahma

Jie Won Ryu

Thomas James Wilson

Nirav Rajendra Patel

Jasmine Soria Sears

Shih-Chyuan Fan Jiang

Wonjae Choi

Ravi Prasad Bulusu

Yi Huang

Spencer Allan Wells

Arman Boromand

Ilie Garbacea

Zhimin Shi

Chengrui Le

Lyle David Bainbridge

Tobias Jung

Christopher Bruce Stipe

Won Sub Kim

Jun Jiang

Daniel Marcos Chapiro

Robert L Ridenour

Nicholas G Roland

Lei Zhao

Sho Nakahara

Christopher Stipe

Shu-Jen Fang

Louis A Cardillo

Amit Bhowmick

Han Chou

Craig A Nelson

Srivatsan Varadarajan

Aiyun Wang

Vijay Kamarshi

Teju J Khubchandani

Valeria Maria Bertacco

Landau F Edouard

Joseph O'keeffe

A device includes a primary electrode, a secondary electrode overlapping at least a portion of the primary electrode, and a liquid crystal layer disposed between the primary electrode and the secondary electrode, where the primary electrode has a spatially variable electrical resistance.

GRIN LC lens design with variable resistance electrode

A varifocal liquid lens includes a body filled with two different fluids separated by an interface of a variable curvature across a clear aperture of the varifocal liquid lens. At least one of the first or second fluids is birefringent, such that a refractive index difference between the first and second fluids and resulting optical power of the varifocal liquid lens is dependent on polarization of impinging light. At a first light polarization, the first and second fluids may be matched in refractive index, while at a second, orthogonal light polarization, the first and second fluids may be mismatched in refractive index, whereby the first interface between the first and second fluids may have a variable, non-zero optical power for the second polarization while having a substantially non-variable, zero optical power for the first polarization of light.

Polarization-selective varifocal liquid lens

A device includes a first lens configured to provide a first optical power that is variable within a first optical power adjustment range at a first step resolution. The device also includes a second lens coupled with the first lens and including a deformable member that is deformable to vary an optical power of the second lens. The second lens is configured to provide a second optical power that is variable within a second optical power adjustment range at a second step resolution, the second step resolution being smaller than the first step resolution.

Hybrid varifocal device and system

According to examples, a lens configuration for a head-mounted display (HMD) device may include a base platform made from glass or plastic, an antenna layer deposited onto the base platform, an optical polymer film deposited onto the antenna layer, and a lens layer deposited onto the optical polymer film through a 3D printing technique. The antenna layer may include a transparent antenna embedded into or deposited onto a transparent layer. The lens layer may be 3D printed as multiple partial layers to have a shape that matches a prescription for the lens layer.

System and method for 3D-printed optical lens with in-situ antenna

A device is provided. The device includes a reflective polarizer configured to selectively reflect or transmit a polarized light based on a polarization of the polarized light. The device also includes a display element disposed at a first side of the reflective polarizer, and configured to output a first image light representing a virtual image. The device also includes a polarization switch disposed between the display element and the reflective polarizer, and configured to switch or maintain a polarization of the first image light. The device further includes an active dimming device disposed at a second side of the reflective polarizer, and configured to provide an adjustable transmittance of an input light.

Switchable artificial reality device

A device includes a liquid crystal ('LC') layer having a gradient refractive index distribution. The device also includes an electrode layer coupled to the LC layer. The electrode layer includes a plurality of electrodes separated by one or more gaps masked by a light shielding material.

Gradient-index liquid crystal device with masked electrode boundary

A switchable optical retardation device includes a switchable retardation element including liquid crystals and an electrical driver circuit. While in a first state, the switchable retardation element modifies light transmitted through the switchable retardation element by causing a phase shift of a first retardation angle. While in a second state, the switchable retardation element modifies the light transmitted through the switchable retardation element by causing a phase shift of a second retardation angle distinct from the first retardation angle. The electrical driver circuit provides a first voltage for placing the switchable retardation element in the first state and a second voltage for placing the switchable retardation element in the second state. The first voltage is greater than the second voltage, the second voltage is a non-zero voltage, and the electrical driver circuit alternatingly provides the first voltage and the second voltage with a predefined frequency.

Switchable retardation device with reduced residual retardation

An electronic device may generate content that is to be displayed on a display. The display may have an array of liquid crystal display pixels for displaying image frames of the content. The image frames may be displayed with positive and negative polarities to help reduce charge accumulation effects. A charge accumulation tracker may analyze the image frames to determine when there is a risk of excess charge accumulation. The charge accumulation tracker may analyze information on gray levels, frame duration, and frame polarity. The charge accumulation tracker may compute a charge accumulation metric for entire image frames or may process subregions of each frame separately. When subregions are processed separately, each subregion may be individually monitored for a risk of excess charge accumulation.

Electronic device display with charge accumulation tracker

System and method for improving displayed image quality of an electronic display that displays a first image frame by applying a first voltage to a display pixel and a second image frame directly before the first image frame by applying a second voltage to the display pixel. A display pipeline is communicatively coupled to the electronic display and receives first image data corresponding with the first image frame, where the image data includes a first grayscale value corresponding with the display pixel. Additionally the display pipeline determines an inversion balancing grayscale offset based at least in part on the first grayscale value when polarity of the first voltage and polarity of the second voltage are the same and determines magnitude of the first voltage by applying the inversion balancing grayscale offset to the first grayscale value to reduce likelihood of a perceivable luminance spike when displaying the first image frame.

Inversion balancing compensation

A video coder is configured to encode video data, wherein one or more pixels of the encoded video data is used to signal in-band a luminance adjustment value for configuring an overall luminance of the displayed video data. In addition, the video data for pixels of the video data are scaled based upon the luminance adjustment value to compensate for the changed overall luminance. By signaling the luminance adjustment value in-band as part of the encoded video data, the need for a separate control channel is reduced, while also simplifying synchronization between the luminance adjustment value and the frame of video data to which it applies. The display may extract and parse the signaled luminance adjustment value to control a parameter of the display device (e.g., driving voltage, supply current, duty cycle, etc.) to achieve the overall luminance level indicated by the luminance adjustment value.

In-band signaling for display luminance control

Devices and methods for useful in providing localized synchronized and/or dynamic in-band internal gamma code adjustment per frame period are provided. By way of example, a display panel includes a data driver, which includes a first DAC configured to provide an internal gamma voltage signal to cause a first adjustment to an image data signal. The first adjustment is configured to selectively adjust the image data signal based at least in part on a refresh rate or a frame rate of the display panel. The data driver includes a second DAC coupled to the first DAC and configured to provide an external gamma voltage signal configured to provide a second adjustment to the image data signal, and an output buffer configured to supply the image data signal to pixels of the display panel, wherein the image data signal comprises the first adjustment and the second adjustment.

Internal gamma correction for electronic displays

The disclosure describes procedures for dynamically employing a variable refresh rate at an LCD display of a consumer electronic device, such as a laptop computer, a tablet computer, a mobile phone, or a music player device. In some configurations, the consumer electronic device can include a host system portion, having one or more processors and a display system portion, having a timing controller, a buffer circuit, a display driver, and a display panel. The display system can receive image data and image control data from a GPU of the host system, evaluate the received image control data to determine a reduced refresh rate (RRR) for employing at the display panel, and then transition to the RRR, whenever practicable, to conserve power. In some scenarios, the transition to the RRR can be a transition from a LRR of 50 hertz or above to a RRR of 40 hertz or below.

Low power display device with variable refresh rates

Systems and methods are provided for improving displayed image quality of an electronic display that includes a display pixel. The electronic display displays a first image frame directly after a second image frame by applying an analog electrical signal to the display pixel. To facilitate display of the first image frame, circuitry receives image data corresponding to the image frame, in which the image data includes a grayscale value that indicates target luminance of the display pixel; determines expected refresh rate of the first image frame based at least in part on actual refresh rate of the second image frame; determines a pixel response correction offset based at least in part on the expected refresh rate of the first image frame; and determines processed image data by applying the pixel response correction offset to the grayscale value, in which the processed image data indicates magnitude of the analog electrical signal.

Step-down pixel response correction systems and methods

Growing community of inventors

Menlo Park, CA, United States of America

Sandro Hermann Pintz