Apple Inc.

Google Inc.

Sun-il Chang

Hyunwoo Nho

Jie Won Ryu

Junhua Tan

Hung Sheng Lin

Kingsuk Brahma

Shengkui Gao

Jesse Aaron Richmond

Injae Hwang

Hyunsoo Kim

Shiping Shen

Sangmoo Choi

Chaohao Wang

Sang Young Youn

Rui Zhang

Myungjoon Choi

Hyunchul Kim

Wonjae Choi

Wei Hsin Yao

Mohammad Bagher Vahid Far

Chin-Wei Lin

Myung-Je Cho

Yafei Bi

Derek Keith Shaeffer

Yun Yu Wang

Ion Bita

Baris Cagdaser

Yunhui Hou

Chih-Wei Yeh

Kavinaath Murugan

Paolo Sacchetto

Shinya Ono

Wei Xiong

Yifan Zhang

David Morris Hoffman

Howard H Tang

Majid Gharghi

Changki Min

Rebecca Park

Jiye Lee

Patrick R Cruce

Weichuan Yao

Jesun Kim

Mahesh B Chappalli

Marc Albrecht

Jun Li

Prashant Mandlik

Nicolas P Bonnier

Lu Zhang

Zhen Zhang

Yi Qiao

Hao-Lin Chiu

Kwang Soon Park

Tobias Jung

Luigi Panseri

Alex H Pai

Mohammad Hajirostam

Yao Shi

Jyothi Karri

Chang Ju Kang

Hyuck-Jae Lee

Sebastian Knitter

Ionut A Mirel

Hsin-Ying Chiu

Young Seok Oh

Toshiaki Sawada

Ji Hoon Lee

Ruicong Chen

Nicolas Le Dortz

Rendering images on an active area of an OLED includes rendering images on the active area of the display panel with a plurality of different frame rates. For a plurality of the different frame rates having a frame rate that matches or is above a threshold frame rate, an image refresh operation is performed once per frame period and a self-refresh operation is not performed during the frame period. When rendering images on the active area, for at least one of the different frame rates having a frame rate that is lower than the threshold frame rate, an image refresh operation is performed once per frame period and a self-refresh operation is performed at least once during the frame period.

Power saving in OLED displays with multiple refresh rates

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for dual color management for a multi-pixel density display. In one aspect, the method includes obtaining an image to be shown on a display, where the display includes both a first area that has a first pixel density and a second area that has a second pixel density that is less than the first pixel density, determining that a pixel with an initial value in the image will be displayed in the first area of the display, in response to determining that a pixel with the initial value in the image will be displayed in the first area of the display, determining a remapped value for the pixel in the image based on the initial value and a lookup table for the first area, and providing the remapped value for output on the display.

Dual color management for a multi-pixel density display

PWM-frame rate misalignment is mitigated through implementation of a discrete variable refresh rate (VRR) scheme. A target frame rate is limited to a frame rate selected from only those frame rates that facilitate alignment of each frame period to a specified edge of a PWM cycle of a brightness control signal of a display panel. This alignment results in each frame period at the selected frame rate starting at a same point in a corresponding PWM cycle and ending at a same point in a corresponding PWM cycle to help ensure a constant effective duty cycle across each successive frame period, which in turn mitigates perception of flicker that otherwise would arise. Further, the discrete VRR scheme can employ a compensation mode for compensating for the delay in rendering or otherwise obtaining a frame for display so as to maintain a consistent duty cycle in the brightness control signal.

Variable refresh rate control using PWM-aligned frame periods

A display device includes a plurality of subpixel emissive areas of a first color, a second color, and a third color arranged in an array having a plurality of rows and columns. Rows of the array include subpixel emissive areas arranged in a repeating pattern of a first color subpixel emissive area, a second color subpixel emissive area, a third color subpixel emissive area, and a second color subpixel emissive area. Alternating columns of the array include subpixel emissive areas: (a) arranged in a repeating pattern of a subpixel emissive area of the first color and a subpixel emissive areas of the third color, and (b) including only subpixel emissive areas of the second color. The display device further includes a plurality of scan lines, a plurality of column lines, and a plurality of electronic subpixel circuits arranged in the array. Each electronic subpixel circuit is configured for receiving electronical signals from a scan line and from a column line and for converting the received signals into a current signal provided to one of the subpixel emissive areas to drive light emission from the subpixel emissive area, where electronic subpixel circuits arranged in a column of the array drive columns of emissive areas having only one color.

Display panel structure with uni-color data lines

Embodiments herein provide various apparatuses and techniques to efficiently mitigate front-of-screen (FoS) artifacts that may occur due to voltage fluctuations due to alternating current (AC) or direct current (DC) mechanisms that may occur in a variety of pixel types. In one embodiment, emission profile awareness circuitry may be implemented to mitigate for FoS artifacts due to DC mechanisms. Two-dimensional (2D) digital compensation circuitry may address the DC portion of the voltage fluctuations by accounting for an emission profile applied to content displayed on an electronic display. In some embodiments, the 2D digital compensation circuitry may compensate for the AC portion of the voltage fluctuations by duplicating the AC voltage fluctuations via voltage error subtraction circuitry and voltage error accumulation circuitry.

Feedforward compensation of high-luminance banding Mura compensation

A display device includes subpixels of a first, second, and third colors, scan lines, and column lines. The subpixels are arranged in an array of rows and columns, with each subpixel in a column being electrically connected to a same column line. Each subpixels in a column is configured for receiving electronic scan signals that control a light output from an emissive element of the subpixel from a scan line and from the column line connected to the subpixel. One or more line drivers provide the electronic scan signals, during a time period for rendering a frame, to subpixels in a first set of columns first to subpixels of the first color and then to the subpixels of the third color and to subpixels in a second set of columns first to subpixels of the third color and then to the subpixels of the first color.

Odd and even row sequential driving in AMOLED with pentile arrangement

An electronic device may include an electronic display having a gate-on-array (GOA) that generates gate signals in response to an activation signal, pixels that activate in response to a combination of the gate signals and data signals indicative of image data, and sensing circuitry. The sensing circuitry may measure a characteristic response of a gate signal a characteristic response of one or more pixels, or both and compare the characteristic responses to baselines. The electronic device may also include compensation circuitry that applies a compensation to the activation signal and/or to the image data based on the comparisons between the characteristic responses and the baselines.

Display panel transistor gate-signal compensation systems and methods

A burn-in compensation method and a computing device configured for burn-in compensation is disclosed. The burn-in compensation can minimize or eliminate a burn-in of an OLED display having areas with different pixel densities. Each area of the OLED display may be divided into zones that include one or more pixels and a burn-in factor may be computed for the zones. A limiting burn-in factor may be determined from a limiting zone that exhibits the highest burn-in. Other zones with burn-in factors that area significantly different from the limiting burn-in factor can be adjusted so that the pixels in the adjusted zones can be driven to radiate similar light at a power similar to the liming zone. The burn-in compensation may be performed for each area and a transition region may be created between areas to minimize light artifacts after burn-in compensation.

Burn-in compensation for display

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for dual color management for a multi-pixel density display. In one aspect, the method includes obtaining an image to be shown on a display, where the display includes both a first area that has a first pixel density and a second area that has a second pixel density that is less than the first pixel density, determining that a pixel with an initial value in the image will be displayed in the first area of the display (), in response to determining that a pixel with the initial value in the image will be displayed in the first area of the display, determining a remapped value for the pixel in the image based on the initial value and a lookup table for the first area (), and providing the remapped value for output on the display ().

A computing device can receive a first measured touch value, the first measured touch value indicating first touch input at a first location near a camera included in the computing device, receive a second measured touch value, the second measured touch value indicating second touch input at a second location farther from the camera than the first location, a density of touch sensors in the second location being greater than a density of touch sensors in the first location, generate a first compensated touch value based on the first measured touch value and a first scaling value, generate a second compensated touch value based on the second measured touch value and a second scaling value, the second scaling value being less than the first scaling value, and process the first touch input and the second touch input based on the first compensated touch value and the second compensated touch value.

Correcting touch inputs

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for gamma lookup table compression based on dimensionality reduction. In one aspect, a method includes obtaining a selection of a particular display condition for a display panel from among different display conditions for the display panel, selecting, based on the selection of the particular display condition, a set of weights for a set of basis functions from among different sets of weights that correspond to the different display conditions for the display panel, determining a gamma lookup table for the particular display condition for the display panel based on the set of weights that were selected and the set of basis functions, and remapping an image to be output on the display panel based on the gamma lookup table for the particular display condition.

Gamma lookup table compression based on dimensionality reduction

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for remapping for mixed dynamic range content. In one aspect, a method for remapping for mixed dynamic range content, the method includes obtaining an image to be displayed that includes both first dynamic range content and second dynamic range content, determining that the image includes first dynamic range content at a first pixel, determining a first remapped value for the first pixel based on a lookup table for first dynamic range content and an initial value for the first pixel, providing the first remapped value for the first pixel for display, determining that the image includes second dynamic range content at a second pixel, determining a second remapped value for the second pixel based on a second initial value for the second pixel, and providing the second remapped value for the second pixel for display.

Remapping for mixed dynamic range content

A device includes: an array of light emitting elements extending in a first plane, each light emitting element being arranged to emit light; an array of pixel driver elements extending in a second plane beneath the array of pixels, in which each pixel driver element is configured to drive a corresponding light emitting element of the array of light emitting elements; a hole positioned within the array of light emitting elements and the array of pixel driver elements, in which the hole extends from the first plane through the second plane, a first multiple of light emitting elements from the array of light emitting elements in a first region adjacent the hole are arranged to provide a first resolution, and a second multiple of light emitting elements from the array of elements in a second region away from the hole are arranged to provide a second resolution.

Reducing hole bezel region in displays

A display panel includes a first set of pixels that each include a respective red sub-pixel and a respective green sub-pixel and a second set of pixels that each include a respective blue sub-pixel and a respective green sub-pixel, where the first set of pixels and the second set of pixels are arranged on the display panel such that at least one side of each of the pixels in the first set of pixels is adjacent to at least one of the pixels in the second set of pixels, at least one side of each of the pixels in the first set of pixels is not adjacent to any pixel, and the green sub-pixels are arranged on the display panel such that the green sub-pixels are evenly distributed in the display panel.

Pixel arrangement for multi-resolution display panel

Growing community of inventors

San Jose, CA, United States of America

Sun-il Chang