公开(公告)号：US20190180679A1

公开(公告)日：2019-06-13

申请号：US16217792

申请日：2018-12-12

Applicant: Google LLC

Inventor： Wonjae Choi ,  Ken Foo ,  John Kaehler

IPC: G09G3/3225

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage medium, for calibrating a display to minimize the effect of image retention are disclosed. In one aspect, a method is disclosed that includes obtaining data representing a current state of pixels in a first region of a display of the user device, determining a current pixel calibration associated with the first region of the display of the user device, determining a difference between the current pixel calibration and an initial pixel calibration for the pixels in the first region of the display of the user device, and adjusting a calibration of pixels in a second region of the display of the user device based on the determined difference between the current pixel calibration and an initial pixel calibration for the pixels in the first region of the display of the user device.

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：US20220415263A1

公开(公告)日：2022-12-29

申请号：US16967192

申请日：2019-09-09

Applicant: Google LLC

Inventor： Sangmoo Choi ,  Wonjae Choi

IPC: G09G3/3291 ,  G09G3/3233 ,  G09G3/3266

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for displaying an image on a flat panel display with an array of pixels. A method includes receiving image data including a grayscale value for each pixel; determining a grayscale delta for each pixel where the grayscale delta is a variation between the grayscale value for a given pixel addressable by a first scan line and the grayscale value for another pixel addressable by a scan line addressed prior to the first scan line; determining an aggregated grayscale delta for the first scan line; comparing a magnitude of the aggregated grayscale delta to a threshold value corresponding to a data signal that results in line crosstalk; modifying the image data when the magnitude of the aggregated grayscale delta equals or exceeds the threshold value, and displaying the image on the flat panel display using the modified image data.

公开(公告)号：US20220327999A1

公开(公告)日：2022-10-13

申请号：US17635774

申请日：2019-11-08

Applicant: Google LLC

Inventor： Sangmoo Choi ,  Janghoon Song ,  Wonjae Choi

IPC: G09G3/3233

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for driving a display with an array of light-emitting pixels. The pixels are arranged in a plurality of rows. The array includes two or more independently drivable areas. Each area includes two or more adjacent rows. The method includes, during an image frame, while operating in a first mode of operation, activating a first shift register circuit addressing only rows of pixels in a first area of the independently drivable areas. Activating the first register circuit illuminates one or more pixels in the first area. The method also includes, during the image frame, while operating in the first mode of operation, deactivating a second shift register circuit addressing only rows of pixels in a second area of the independently drivable areas. Deactivating the second register circuit maintains every pixel in the second area unilluminated during the image frame.

公开(公告)号：US20220301516A1

公开(公告)日：2022-09-22

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

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：US20200184934A1

公开(公告)日：2020-06-11

申请号：US16545663

申请日：2019-08-20

Applicant: Google LLC

Inventor： Wonjae Choi ,  Daniel Solomon ,  John Kaehler

IPC: G09G5/395 ,  G06T1/60

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for enabling a variable refresh rate on a display. One of the methods includes receiving, from a content presentation device, a first signal set to a first value; completing generation of first visual content; and after completing the generation of the first visual content, determining that the first signal is set to the first value and a second threshold duration of time has not expired; sending, to the content presentation device, the first visual content, wherein sending the first visual content causes the content presentation device to change the first signal from the first value to the second value; and after sending the first visual content, receiving, from the content presentation device, the first signal set to the second value.