公开(公告)号：US20230274573A1

公开(公告)日：2023-08-31

申请号：US18313138

申请日：2023-05-05

Applicant: Google LLC

Inventor： Hyunchul Kim ,  Chien-Hui Wen

IPC: G06V40/13 ,  G09G3/3208

CPC classification number: G06V40/1318 ,  G09G3/3208 ,  G09G2320/0633 ,  G09G2320/064

Abstract: This document describes systems and techniques for spatially and temporally dynamic illumination for fingerprint authentication. In aspects, a method is disclosed that involves receiving user input at a display of an electronic device, initiating biometric authentication, and instructing a display-driver integrated circuit (DDIC) to implement a local high-brightness mode, which causes a predetermined portion of the display to increase in luminance to a target luminance for at least a first interval and a second interval. The DDIC is also instructed to cause a variable portion of the display to increase in luminance for the first interval and, at the expiration of the first interval, decrease luminance. During the first and/or second interval, an under-display fingerprint sensor captures one or more images. It is then determined, based on analysis of the one or more images, whether the user input is indicative of an authorized user.

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：US20220301518A1

公开(公告)日：2022-09-22

申请号：US17207443

申请日：2021-03-19

Applicant: Google LLC

Inventor： Hyunchul Kim ,  Sang Young Youn

IPC: G09G5/06 ,  G06T7/90 ,  G06T7/00

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for three sub-color correction based on two-dimensional graphs. In an aspect, a method includes obtaining an image to be shown on a display, determining three sub-color values of a particular pixel in the image, including a first sub-color value for a first sub-color, a second sub-color value for a second sub-color, and a third sub-color value for a third sub-color of the particular pixel, obtaining a representation of a two-dimensional graph of color-correction curves, selecting a selected color-correction curve to use to correct the first sub-color value based on both the second sub-color value and the third sub-color value, determining a corrected first sub-color value based on the first sub-color value, and outputting the image using the corrected first sub-color value instead of the first sub-color value.

公开(公告)号：US12148367B2

公开(公告)日：2024-11-19

申请号：US17596047

申请日：2019-11-20

Applicant: Google LLC

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

IPC: G09G3/3208

Abstract: 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.

公开(公告)号：US11783752B2

公开(公告)日：2023-10-10

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

CPC classification number: G09G3/2074 ,  G09G5/005 ,  G09G2320/0276 ,  G09G2320/0285 ,  G09G2320/0673

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：US20220366829A1

公开(公告)日：2022-11-17

申请号：US17774386

申请日：2019-12-05

Applicant: Google LLC

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

IPC: G09G3/20

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 (120), 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 (130), and providing the remapped value for output on the display (150).

公开(公告)号：US11282447B2

公开(公告)日：2022-03-22

申请号：US17150518

申请日：2021-01-15

Applicant: Google LLC

Inventor： Hyunchul Kim ,  Sun-Il Chang

IPC: G09G3/30 ,  G09G3/3208

Abstract: A method includes displaying an image on an organic light-emitting (OLED) display panel that includes a first display area having a first pixel density and a second display area having a second pixel density lower than the first pixel density, and while displaying the image, deactivating individual pixels in the first display area corresponding to a proximity of the individual pixels to the second display area such that a region of the first display area adjacent the second display area has a virtual pixel density between the first pixel density and the second pixel density.

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.