公开(公告)号：US12254531B2

公开(公告)日：2025-03-18

申请号：US17640042

申请日：2020-09-16

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiufeng Zhang

IPC: G06T11/00 ,  H04N9/64

Abstract: An electronic device for image color adjustment includes a display and a processor. The processor includes a display processing unit (DPU). The DPU obtains a to-be-displayed image, obtains, based on a first color mode, a target three-dimensional (3D) lookup table used to adjust the to-be-displayed image, maps a color of the to-be-displayed image based on the target 3D lookup table, to obtain an adjusted image, and sends the adjusted image to the display for displaying.

公开(公告)号：US20240212229A1

公开(公告)日：2024-06-27

申请号：US17640042

申请日：2020-09-16

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiufeng Zhang

IPC: G06T11/00 ,  H04N9/64

CPC classification number: G06T11/001 ,  H04N9/64 ,  G06T2200/24

Abstract: An electronic device for image color adjustment includes a display and a processor. The processor includes a display processing unit (DPU). The DPU obtains a to-be-displayed image, obtains, based on a first color mode, a target three-dimensional (3D) lookup table used to adjust the to-be-displayed image, maps a color of the to-be-displayed image based on the target 3D lookup table, to obtain an adjusted image, and sends the adjusted image to the display for displaying.

公开(公告)号：US11978384B2

公开(公告)日：2024-05-07

申请号：US17760672

申请日：2020-09-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiufeng Zhang

IPC: G09G3/20

CPC classification number: G09G3/2096 ,  G09G2320/0666 ,  G09G2340/12

Abstract: A display method for an electronic device including a first display area and a second display area. In the method, the electronic device determines a first application mode, adjusts, based on the first application mode, intensity values of color channels, stored in a hardware composer (HWC), determines, using the HWC, each first layer corresponding to the first display area, and overlays, using the HWC, the first layer and a background color layer corresponding to adjusted intensity values of the color channels. In an overlay process, the background color layer is located below the first layer, and the background color layer corresponds to the second display area. Then, the display is used to display an overlaid image.

公开(公告)号：US11869450B2

公开(公告)日：2024-01-09

申请号：US17917762

申请日：2021-04-06

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiufeng Zhang

IPC: G09G3/34

CPC classification number: G09G3/3426 ,  G09G3/3413 ,  G09G2320/0626

Abstract: A display brightness adjustment method includes: an electronic apparatus obtains a to-be-displayed image and determines an average pixel brightness value of each backlight partition on a liquid crystal display (LCD) panel based on the to-be-displayed image, where a backlight region of the LCD panel is divided into a plurality of backlight partitions; the electronic apparatus determines an initial dimming duty cycle corresponding to each backlight partition based on the average pixel brightness value of each backlight partition; the electronic apparatus determines a drive current value based on the initial dimming duty cycle corresponding to each backlight partition and drive current threshold data; the electronic apparatus adjusts, based on the drive current value, light emitting brightness of the backlight region that exists when the to-be-displayed image is displayed.

公开(公告)号：US11138928B2

公开(公告)日：2021-10-05

申请号：US17041889

申请日：2018-03-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiufeng Zhang

IPC: G09G3/3208

Abstract: A screen brightness adjustment method includes determining target brightness, determining a quantity of pixel rows controlled by each pulse in an emission (EM) signal required for implementing the target brightness, adjusting a pulse width of a pulse in a current EM signal based on the quantity of pixel rows controlled by each pulse in the EM signal required for implementing the target brightness to change a duty cycle of the EM signal, where the duty cycle reflects a quantity of pixel rows that are lit up and controlled by the EM signal.

公开(公告)号：US11881168B2

公开(公告)日：2024-01-23

申请号：US17640587

申请日：2020-09-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： Lei Wu ,  Jinsong Wen ,  Xiufeng Zhang ,  Jinqin Ai ,  Yiyang Zhang ,  Haixiao Liu

IPC: G09G3/3233 ,  G09G3/00 ,  G09G3/20

CPC classification number: G09G3/3233 ,  G09G3/035 ,  G09G3/2007 ,  G09G2320/0233 ,  G09G2320/0242 ,  G09G2320/048 ,  G09G2320/0673 ,  G09G2320/0686 ,  G09G2360/16

Abstract: A display screen aging compensation method, system, and device, the method including obtaining display data of each display area of a display screen having at least one display area, the display data including usage time t of the display area, a maximum gray level value Lev_max that is of each primary color and that is obtained before the display data, and an average gray level value Lev of each primary color of three primary colors within the usage time t, where the usage time is accumulated screen-on time that is of the display area and that is obtained after the display screen is powered on, obtaining a decay ratio of each primary color of the display area based on the display data, and performing aging compensation on each display area based on the decay ratio of each primary color of each display area.

公开(公告)号：US20220343845A1

公开(公告)日：2022-10-27

申请号：US17640587

申请日：2020-09-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： Lei Wu ,  Jinsong Wen ,  Xiufeng Zhang ,  Jinqin Ai ,  Yiyang Zhang ,  Haixiao Liu

IPC: G09G3/3233 ,  G09G3/00 ,  G09G3/20

Abstract: A display screen aging compensation method, system, and device, the method including obtaining display data of each display area of a display screen having at least one display area, the display data including usage time t of the display area, a maximum gray level value Lev_max that is of each primary color and that is obtained before the display data, and an average gray level value Lev of each primary color of three primary colors within the usage time t, where the usage time is accumulated screen-on time that is of the display area and that is obtained after the display screen is powered on, obtaining a decay ratio of each primary color of the display area based on the display data, and performing aging compensation on each display area based on the decay ratio of each primary color of each display area.

公开(公告)号：US12142202B2

公开(公告)日：2024-11-12

申请号：US17917392

申请日：2021-04-06

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiufeng Zhang

IPC: G09G3/3208

Abstract: This application discloses a display brightness adjustment method, including: an electronic apparatus obtains a to-be-displayed image and calculates an average pixel level APL of the to-be-displayed image. The electronic apparatus determines, based on the third light adjustment curve, an actual display brightness value corresponding to the average pixel level of the to-be-displayed image. The electronic apparatus adjusts display brightness of the to-be-displayed image based on the actual display brightness value. In this way, impact exerted on contrast when brightness is turned down at a low APL can be ensured, and a high contrast effect of image brightness of an HDR display can be ensured.

公开(公告)号：US20230169932A1

公开(公告)日：2023-06-01

申请号：US17917762

申请日：2021-04-06

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiufeng Zhang

IPC: G09G3/34

CPC classification number: G09G3/3426 ,  G09G3/3413 ,  G09G2320/0626

Abstract: A display brightness adjustment method includes: an electronic apparatus obtains a to-be-displayed image and determines an average pixel brightness value of each backlight partition on a liquid crystal display (LCD) panel based on the to-be-displayed image, where a backlight region of the LCD panel is divided into a plurality of backlight partitions; the electronic apparatus determines an initial dimming duty cycle corresponding to each backlight partition based on the average pixel brightness value of each backlight partition; the electronic apparatus determines a drive current value based on the initial dimming duty cycle corresponding to each backlight partition and drive current threshold data; the electronic apparatus adjusts, based on the drive current value, light emitting brightness of the backlight region that exists when the to-be-displayed image is displayed.

公开(公告)号：US20220392394A1

公开(公告)日：2022-12-08

申请号：US17760672

申请日：2020-09-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiufeng Zhang

IPC: G09G3/20

Abstract: A display method for an electronic device including a first display area and a second display area. In the method, the electronic device determines a first application mode, adjusts, based on the first application mode, intensity values of color channels, stored in a hardware composer (HWC), determines, using the HWC, each first layer corresponding to the first display area, and overlays, using the HWC, the first layer and a background color layer corresponding to adjusted intensity values of the color channels. In an overlay process, the background color layer is located below the first layer, and the background color layer corresponds to the second display area. Then, the display is used to display an overlaid image.