公开(公告)号：US20230030201A1

公开(公告)日：2023-02-02

申请号：US17786961

申请日：2020-03-31

Applicant: GOOGLE LLC

Inventor： Sang Young Youn ,  Sun-il Chang ,  Wonjae Choi ,  Sangmoo Choi

IPC: G09G3/34

Abstract: 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.

公开(公告)号：US20220375385A1

公开(公告)日：2022-11-24

申请号：US17880223

申请日：2022-08-03

Applicant: Google LLC

Inventor： David Morris Hoffman ,  Sangmoo Choi ,  Sun-il Chang ,  Ion Bita

IPC: G09G3/20 ,  G09G3/3208

Abstract: 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.

公开(公告)号：US20220319382A1

公开(公告)日：2022-10-06

申请号：US17615992

申请日：2019-12-17

Applicant: Google LLC

Inventor： Hyunchul Kim ,  Sun-il Chang ,  Wonjae Choi ,  Sang Young Youn

IPC: G09G3/20 ,  G09G5/00

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for gamma lookup table compression. In one aspect, a method includes obtaining a gamma value for a pixel of an image to be shown on a display, determining a base gamma value based on a base lookup table that corresponds to a base display condition, determining a delta gamma value based on a delta lookup table that corresponds to a current display condition for the pixel, determining a remapped gamma value for the pixel based on a combination of the base gamma value and the delta gamma value, and providing the remapped gamma value to be shown on the display.

公开(公告)号：US20220020323A1

公开(公告)日：2022-01-20

申请号：US17311632

申请日：2019-08-01

Applicant: GOOGLE LLC

Inventor： Sangmoo Choi ,  Wonjae Choi ,  Sang Young Youn ,  Sun-il Chang

IPC: G09G3/3225 ,  G09G3/20

Abstract: A method for driving an organic light emitting diode display having a first plurality of pixel lines having a first pixel density and a second plurality of pixel lines having a second pixel density higher than the first pixel density, the method including driving the first and second plurality of pixel lines with corresponding drive signals at a frame rate at which frames are displayed, where during each of the frames the drive signals have a pixel on time during which pixels in the pixel lines driven by the drive signals emit light and a pixel off time during which pixels in the pixel lines driven by the drive signals are dark, where the pixel on times and the pixel off times are varied between the drive signals to reduce variations in luminance.

公开(公告)号：US20240355254A1

公开(公告)日：2024-10-24

申请号：US18759610

申请日：2024-06-28

Applicant: Google LLC

Inventor： Hyunchul Kim ,  Wonjae Choi ,  Sun-il Chang

IPC: G09G3/20

CPC classification number: G09G3/2003 ,  G09G2320/0242 ,  G09G2320/0686 ,  G09G2340/06

Abstract: 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.

公开(公告)号：US12039954B2

公开(公告)日：2024-07-16

申请号：US17635980

申请日：2020-01-21

Applicant: Google LLC

Inventor： Hyunchul Kim ,  Sun-il Chang ,  Wonjae Choi

IPC: G09G5/00 ,  G09G5/10

CPC classification number: G09G5/006 ,  G09G5/10 ,  G09G2320/0626 ,  G09G2320/0673 ,  G09G2340/0435 ,  G09G2354/00 ,  G09G2360/16

Abstract: 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.

公开(公告)号：US12020411B2

公开(公告)日：2024-06-25

申请号：US17051822

申请日：2019-12-04

Applicant: Google LLC

Inventor： Hyunchul Kim ,  Wonjae Choi ,  Sang Young Youn ,  Sun-il Chang

IPC: G06T5/00 ,  G06T5/92

CPC classification number: G06T5/92 ,  G06T2207/20208

Abstract: 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.

公开(公告)号：US11955076B2

公开(公告)日：2024-04-09

申请号：US17756319

申请日：2020-07-10

Applicant: Google LLC

Inventor： Ji Hoon Lee ,  Sun-il Chang ,  Sang Young Youn

IPC: G09G3/3233 ,  G09G3/3258

CPC classification number: G09G3/3233 ,  G09G3/3258 ,  G09G2330/021

Abstract: An example method includes estimating, based on content to be displayed at a display of a mobile computing device at a future time, an amount of power to be used by the display at the future time; selecting, based on the estimated power level, a power converter of a plurality of power converters of the mobile computing device, each of the plurality of power converters optimized for a different output power range; and causing electrical power from the selected power converter to be supplied to the display at the future time.

公开(公告)号：US11842674B2

公开(公告)日：2023-12-12

申请号：US17626844

申请日：2019-11-08

Applicant: GOOGLE LLC

Inventor： Sun-il Chang ,  Sangmoo Choi

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2300/0408 ,  G09G2300/0426 ,  G09G2310/0286

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for a display with discrete gate-in-panel circuitry. In some implementations, a display includes an array of emissive pixels arranged in rows and columns, where the array includes a first continuous area having a first pixel density and a second continuous area having a second pixel density less than the first pixel density, and consecutive rows of the emissive pixels extending between the first and second continuous areas. The display also includes gate in panel (GIP) circuits in the second continuous area, a data lines connected to the array of emissive pixels, and signal lines connected to the array of emissive pixels.

公开(公告)号：US20230236698A1

公开(公告)日：2023-07-27

申请号：US17999019

申请日：2020-06-03

Applicant: Google LLC

Inventor： Young Seok Oh ,  Sun-il Chang

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0418 ,  G06F3/044 ,  G06F2203/04104

Abstract: 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.