公开(公告)号：WO2021126169A1

公开(公告)日：2021-06-24

申请号：PCT/US2019/066859

申请日：2019-12-17

Applicant: GOOGLE LLC

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

IPC: G09G5/00 ,  G09G2320/0276 ,  G09G2320/0673 ,  G09G2350/00 ,  G09G2360/16 ,  G09G5/005

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：WO2021112838A1

公开(公告)日：2021-06-10

申请号：PCT/US2019/064444

申请日：2019-12-04

Applicant: GOOGLE LLC

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

IPC: H04N19/85 ,  H04N19/70 ,  H04N19/98 ,  H04N19/467 ,  H04N19/182 ,  H04N19/117

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：WO2022010490A1

公开(公告)日：2022-01-13

申请号：PCT/US2020/041613

申请日：2020-07-10

Applicant: GOOGLE LLC

Inventor： LEE, Ji Hoon ,  CHANG, Sun-il ,  YOUN, Sang Young

IPC: G09G3/34

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：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：WO2021021210A1

公开(公告)日：2021-02-04

申请号：PCT/US2019/044680

申请日：2019-08-01

Applicant: GOOGLE LLC

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

IPC: G09G3/3208

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：WO2022010487A1

公开(公告)日：2022-01-13

申请号：PCT/US2020/041534

申请日：2020-07-10

Applicant: GOOGLE LLC

Inventor： CHOI, Sangmoo ,  CHANG, Sun-il

IPC: G09G3/20 ,  G09G3/3233 ,  H01L27/32

Abstract: An example device for controlling a display includes a memory configured to store gray values of subpixels of a pixel and a display system communicatively coupled to the memory. The display system is configured to obtain a gray value for a first subpixel of the pixel from the memory and obtain a gray value for a second subpixel of the pixel from the memory. The display system is also configured to determine, based on the gray value for the second subpixel, an adjusted gray value for the first subpixel and output the adjusted gray value for the first subpixel.

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：WO2021046253A1

公开(公告)日：2021-03-11

申请号：PCT/US2020/049253

申请日：2020-09-03

Applicant: GOOGLE LLC

Inventor： CHOI, Sangmoo ,  CHANG, Sun-il ,  YOUN, Sang Young

IPC: G09G3/3225

Abstract: An apparatus is described that includes a display panel and a sensor. The display panel includes an array of pixels configured to direct light through a front side of the display panel. Each pixel includes sub-pixels, each of which includes an organic light emitting diode (OLED) and an integrated circuit (IC) for controlling an electrical current to the OLED. The sensor is arranged at a back side of the display panel. The sensor includes an emitter configured to emit electromagnetic radiation transmitted through a first area of the display panel. The IC of sub-pixels of the array of pixels outside the first area includes a first IC arrangement. The IC of sub-pixels of the array of pixels within the first area includes a transistor in addition to the first IC arrangement. The transistor is configured to operate as a control switch controlling emission of light from the sub-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.