公开(公告)号：WO2022197387A1

公开(公告)日：2022-09-22

申请号：PCT/US2022/015297

申请日：2022-02-04

Applicant: GOOGLE LLC

Inventor： KIM, Hyunchul ,  YOUN, Sang Young

IPC: G09G5/02

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：WO2021021788A1

公开(公告)日：2021-02-04

申请号：PCT/US2020/043842

申请日：2020-07-28

Applicant: GOOGLE LLC

Inventor： KIM, Hyunchul ,  CHANG, Sun-il

IPC: G09G3/3225

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：WO2021236069A1

公开(公告)日：2021-11-25

申请号：PCT/US2020/033637

申请日：2020-05-19

Applicant: GOOGLE LLC

Inventor： YOUN, Sang Young ,  CHANG, Sun-il ,  CHOI, Wonjae ,  KIM, Hyunchul

IPC: G09G5/00 ,  G09G5/10

Abstract: A frame generation subsystem renders a sequence of frames and a display control subsystem provides a brightness control signal configured to control a brightness of frames displayed at a display panel via pulse width modulation (PWM) of the brightness control signal and determines a deviation in a duty cycle of a first PWM period of the brightness control signal from a default duty cycle resulting from a delayed rendering of a frame. The display control subsystem adjusts a duty cycle of at least a second PWM period to compensate for the deviation in the duty cycle of the first PWM period. The resulting average duty cycle of the brightness control signal over the two frame periods is approximately equal to a default duty cycle and thereby mitigates viewable flicker resulting from the duty cycle change caused by the delayed rendering.

公开(公告)号：WO2021101537A1

公开(公告)日：2021-05-27

申请号：PCT/US2019/062447

申请日：2019-11-20

Applicant: GOOGLE LLC

Inventor： KIM, Hyunchul ,  CHANG, Sun-il ,  CHOI, Wonjae

IPC: G09G3/3208 ,  G09G5/04

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：WO2021086511A1

公开(公告)日：2021-05-06

申请号：PCT/US2020/051200

申请日：2020-09-17

Applicant: GOOGLE LLC

Inventor： CHANG, Sun-il ,  CHOI, Sangmoo ,  KIM, Hyunchul

IPC: G09G3/20

Abstract: A display panel includes a plurality of array sites arranged in an array defined by a plurality of rows and a plurality of columns. The display panel includes a first area of the array having a first pixel density and a second area of the array having a second pixel density lower than the first pixel density. The second area of the array includes a plurality of the array sites that are devoid of pixels. Rows of the second area that border the first area include at least one pixel and columns of the second area that border the first area include at least one pixel.

公开(公告)号：WO2021021209A1

公开(公告)日：2021-02-04

申请号：PCT/US2019/044665

申请日：2019-08-01

Applicant: GOOGLE LLC

Inventor： KIM, Hyunchul ,  CHANG, Sun-il

IPC: G09G3/3208

Abstract: A method includes receiving original image content represented in a first color model, determining converted image content represented in a second color model from the original image content represented in the first color model, obtaining a distortion compensation profile that compensates for differences in response characteristics between the first portion of the display and the second portion of the display, determining compensated image content represented in the second color model based on the converted image content and the distortion compensation profile, determining reconverted compensated image content represented in the first color model from the compensated image content represented in the second color model, and providing the reconverted compensated image content represented in the first color model for display on a display panel.

公开(公告)号：WO2021150249A1

公开(公告)日：2021-07-29

申请号：PCT/US2020/015072

申请日：2020-01-24

Applicant: GOOGLE LLC

Inventor： CHANG, Sun-il ,  KIM, Hyunchul

IPC: G09G3/3225 ,  G09G3/3208 ,  G09G2320/0233 ,  G09G2320/046 ,  G09G2360/144 ,  G09G2360/145 ,  G09G2360/147

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for compensating an image to be shown on a display including an array of light-emitting pixels and a sensor arranged to receive light transmitted by adjacent light-emitting pixels. A method includes collecting, from the sensor, a luminance of light received by the sensor during an emission-on period, and a luminance of light received by the sensor during an emission-off period. The method includes calculating, by comparing the luminance during the emission-on period to the luminance during the emission-off period, a luminance of light internally reflected from the adjacent pixels and received by the sensor during the emission-on period. The method includes determining that an error between the luminance of light internally reflected and a reference luminance equals or exceeds a threshold error, and adjusting a driving voltage for driving the pixels to reduce the error.

公开(公告)号：WO2021150205A1

公开(公告)日：2021-07-29

申请号：PCT/US2020/014327

申请日：2020-01-21

Applicant: GOOGLE LLC

Inventor： KIM, Hyunchul ,  CHANG, Sun-il ,  CHOI, Wonjae

IPC: G09G3/20 ,  G09G2320/0285 ,  G09G2320/0626 ,  G09G2320/0666 ,  G09G2320/0673 ,  G09G2340/0435 ,  G09G3/2092

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：WO2021112854A1

公开(公告)日：2021-06-10

申请号：PCT/US2019/064686

申请日：2019-12-05

Applicant: GOOGLE LLC

Inventor： KIM, Hyunchul ,  CHOI, Wonjae ,  CHANG, Sun-il

IPC: G09G3/32

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：WO2022046152A1

公开(公告)日：2022-03-03

申请号：PCT/US2020/070461

申请日：2020-08-25

Applicant: GOOGLE LLC

Inventor： KIM, Hyunchul ,  YOUN, Sang Young

IPC: G06F12/0875 ,  G06F12/0895 ,  G06T1/60

Abstract: An example method includes obtaining a particular input color sample of a current line of samples rendered by a graphical processing unit (GPU) of the device; maintaining a cache that includes entries mapping input color samples to output interpolated color samples; determining whether the cache includes an entry corresponding to the particular input color sample; responsive to determining that the cache includes an entry corresponding to the particular input color sample, outputting, by the processing circuitry, a particular output interpolated color sample included in the entry corresponding to the particular input color sample without performing interpolation on the particular input color sample; and displaying, at a display of the device, a representation of the particular output interpolated color sample.