Driving method for high dynamic range display screen, driving apparatus and display screen

• US 10,462,379 B2
• Filed: 02/06/2017
• Issued: 10/29/2019
• Est. Priority Date: 05/06/2016
• Status: Active Grant

• Current Assignee: Beijing BOE Display Technology Co Ltd (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Zhou, Chengqi, Chu, Yifang, Li, Shou
• Primary Examiner(s): Simpson, Lixi C
• Application Number:
  US15/548,863
• Publication Number:
  US 20180069999A1
• Time in Patent Office: 995 Days
• CPC Class Codes: G06T 1/0007 Image acquisition
• CPC Class Codes: G06T 2207/20012 Locally adaptive
• CPC Class Codes: G06T 2207/20208 High dynamic range [HDR] image processing
• CPC Class Codes: G06T 5/94 based on local image properties, e.g. for local contrast enhancement
• CPC Class Codes: G06T 7/11 Region-based segmentation
• CPC Class Codes: G09G 2320/0646 Modulation of illumination source brightness and image signal correlated to each other
• CPC Class Codes: G09G 2360/16 Calculation or use of calculated indices related to luminance levels in display data
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: G09G 3/3426 the different display panel areas being distributed in two dimensions, e.g. matrix
• CPC Class Codes: H04N 23/741 by increasing the dynamic range of the image compared to the dynamic range of the electronic image sensors

Abstract

A driving method and a driving apparatus of a high dynamic range display screen, and a display screen. The driving method includes: acquiring image data to be displayed; determining a local backlight brightness of each region in a backlight module according to the image data to be displayed; adjusting pixel brightness corresponding to the image data to be displayed according to the local backlight brightness and a maximum backlight bright in the backlight module; and carrying out display according to the adjusted brightness and the determined local backlight brightness of each region.

Claims

1. A driving method of a high dynamic range display screen, comprising:

acquiring image data to be displayed;

determining a local backlight brightness of each region in a backlight module according to the image data to be displayed;

adjusting pixel brightness corresponding to the image data to be displayed according to the local backlight brightness and a maximum backlight bright in the backlight module; and

carrying out display according to the adjusted brightness and the determined local backlight brightness of each region;

wherein the adjusting the brightness of the image data to be displayed according to the local backlight brightness and the maximum backlight brightness in the backlight module comprises;

determining original pixel brightness according to the image data to be displayed; and

adjusting the original pixel brightness according to the local backlight brightness and the maximum backlight brightness in the backlight module;

wherein the adjusting the original pixel brightness according to the local backlight brightness and the maximum backlight brightness in the backlight module comprises;

adjusting the original pixel brightness by adopting a formula as follows;

2. The driving method according to claim 1, wherein the BL_DB is a local backlight brightness of the backlight module after dynamic adjustment.

3. The driving method according to claim 2, wherein a value of the “

a”

parameter ranges from ⅛

to 1.

4. The driving method according to claim 2, wherein when brightness of a region which corresponds to the image data to be displayed is smaller, the determined local backlight brightness in the backlight module is smaller.

5. The driving method according to claim 1, wherein a value of the “

a”

parameter ranges from ⅛

to 1.

6. The driving method according to claim 5, wherein when brightness of a region which corresponds to the image data to be displayed is smaller, the determined local backlight brightness in the backlight module is smaller.

7. The driving method according to claim 1, wherein when brightness of a region which corresponds to the image data to be displayed is smaller, the determined local backlight brightness in the backlight module is smaller.

8. A driving apparatus of a high dynamic range display screen, comprising:

a receiving unit, configured to acquire image data to be displayed;

a backlight control unit, configured to determine a local backlight brightness of each region in a backlight module according to the image data to be displayed;

a pixel compensation unit, configured to adjust brightness corresponding to the image data to be displayed according to the local backlight brightness and a maximum backlight brightness in the backlight module; and

a display control unit, configured to carry out display according to the adjusted brightness and the determined local backlight brightness of each region;

wherein the pixel compensation unit is configured to;

determine original pixel brightness according to the image data to be displayed; and

adjust the original pixel brightness according to the local backlight brightness and the maximum backlight brightness in the backlight module;

wherein the pixel compensation unit is configured to adjust the original pixel brightness by adopting a formula as follows;

9. The driving apparatus according to claim 8, wherein the BL_DB is a local backlight brightness of the backlight module after dynamic adjustment.

10. The driving apparatus according to claim 9, wherein a value of the “

a”

parameter ranges from ⅛

to 1.

11. A high dynamic range display screen, comprising a backlight module and the driving apparatus according to claim 8.

12. The driving apparatus according to claim 8, wherein when brightness of a region which corresponds to the image data to be displayed is smaller, the determined local backlight brightness in the backlight module is smaller.