# US 12,603,032 B2 · Gamma tuning method, apparatus, and computer-readable storage medium

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- Number: US 12,603,032 B2
- Document ID: US12603032B2
- Status: Granted
- Kind: B2
- Application number: 19/055,501
- Filed: 2025-02-18
- Published: 2025-06-12
- Granted: 2026-04-14
- Earliest claimed: 2022-09-05
- Assignees: KunShan Go-Visionox Opto-Electronics Co., Ltd
- Applicants: Kunshan Go-Visionox Opto-Electronics Co., Ltd.
- Inventors: Yuqing Wang; Tao Tang; Qiong Jia
- Web page: https://patentgrep.com/patent/US12603032B2

## CPC

- G09G 3/2074: {using sub-pixels}
- G09G 3/006: {Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309)}
- G09G 3/2003: {Display of colours (specific for liquid crystal displays G09G3/3607)}
- G09G 2320/0242: Compensation of deficiencies in the appearance of colours
- G09G 2320/0673: for control of gamma adjustment, e.g. selecting another gamma curve
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

A gamma tuning method, apparatus, and computer-readable storage medium. The gamma tuning method is applied to a display panel including a first display area and a second display area, and the gamma tuning method includes: acquiring a first register value of the first display area after gamma tuning under a target gray scale; and determining, according to the first register value and a predetermined linear relationship between register values of the first display area and register values of the second display area, a target register value of the second display area under the target gray scale.

## Claims

### Claim 1

A gamma tuning method, applied to a display panel, comprising:
a first display area and a second display area, the method comprising:
acquiring a first register value of the first display area after gamma tuning under a target gray scale;
determining, according to the first register value and a predetermined linear relationship between register values of the first display area and register values of the second display area, a target register value of the second display area under the target gray scale;
wherein the first display area and the second display area respectively comprise sub-pixels of n colors, the first register value comprises first sub-register values corresponding to the sub-pixels of n colors in one-to-one correspondence, and n is an integer greater than or equal to 1; and
wherein the determining, according to the first register value and the predetermined linear relationship between register values of the first display area and register values of the second display area, the target register value of the second display area under the target gray scale comprises:
for a sub-pixel of any ith color of the sub-pixels of n colors, determining, according to the first sub-register value corresponding to the sub-pixel of the ith color and a linear relationship between a register value of the sub-pixel of the ith color in the first display area and a register value of the sub-pixel of the ith color in the second display area, a target register value of the sub-pixel of the ith color in the second display area under the target gray scale, wherein i is an integer greater than or equal to 1.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the first display area and the second display area respectively comprise red sub-pixels, green sub-pixels and blue sub-pixels; and
the determining, according to the first register value and the predetermined linear relationship between register values of the first display area and register values of the second display area, the target register value of the second display area under the target gray scale comprises:
for the red sub-pixel, determining, according to the first sub-register value of the red sub-pixel in the first display area after gamma tuning under the target gray scale and a linear relationship between a register value of the red sub-pixel in the first display area and a register value of the red sub-pixel in the second display area, a target register value of the red sub-pixel in the second display area under the target gray scale;
for the green sub-pixel, determining, according to the first sub-register value of the green sub-pixel in the first display area after gamma tuning under the target gray scale and a linear relationship between a register value of the green sub-pixel in the first display area and a register value of the green sub-pixel in the second display area, a target register value of the green sub-pixel in the second display area under the target gray scale; and
for the blue sub-pixel, determining, according to the first sub-register value of the blue sub-pixel in the first display area after gamma tuning under the target gray scale and a linear relationship between a register value of the blue sub-pixel in the first display area and a register value of the blue sub-pixel in the second display area, a target register value of the blue sub-pixel in the second display area under the target gray scale.

### Claim 3 (depends on 1)

The method according to claim 1, further comprising:
before the acquiring of the first register value of the first display area after gamma tuning under the target gray scale, acquiring first history register values of first display areas of a plurality of test display panels after gamma tuning and second history register values of second display areas of the plurality of test display panels;
determining a slope of the linear relationship according to the first history register values and the second history register values;
acquiring a second register value of the first display area of the display panel after gamma tuning under a first gray scale and a third register value of the second display area of the display panel after gamma tuning under the first gray scale;
determining an intercept of the linear relationship according to the second register value and the third register value; and
obtaining the linear relationship according to the slope and the intercept of the linear relationship.

### Claim 4 (depends on 3)

The method according to claim 3, wherein the target gray scale is any of a plurality of gray scales other than the first gray scale.

### Claim 5 (depends on 3)

The method according to claim 3, wherein the first display area and the second display area respectively comprise sub-pixels of n colors, and n is an integer greater than or equal to 1;
the first history register values comprise first sub-history register values corresponding to the sub-pixels of n colors in one-to-one correspondence, and the second history register values comprise second sub-history register values corresponding to the sub-pixels of n colors in one-to-one correspondence;
the determining the slope of the linear relationship according to the first history register values and the second history register values comprises:
for sub-pixels of any ith color of the sub-pixels of n colors, determining a slope of a sub-linear relationship according to the first sub-history register values corresponding to the sub-pixels of the ith color in the plurality of test display panels and the second sub-history register values corresponding to the sub-pixels of the ith color in the plurality of test display panels; the sub-linear relationship comprising a linear relationship between register values of the sub-pixels of the ith color in the first display area and register values of the sub-pixels of the ith color in the second display area;
the second register value comprises second sub-register values corresponding to the sub-pixels of n colors in one-to-one correspondence, and the third register value comprises third sub-register values corresponding to the sub-pixels of n colors in one-to-one correspondence; and
the determining the intercept of the linear relationship according to the second register value and the third register value comprises:
determining an intercept of the sub-linear relationship according to the second sub-register values corresponding to the sub-pixels of the ith color in the display panel and the third sub-register values corresponding to the sub-pixels of the ith color in the display panel.

### Claim 6 (depends on 3)

The method according to claim 3, wherein a brightness of the display panel comprises a plurality of brightness levels, each of the brightness levels corresponds to M gray scales, and Mis an integer greater than or equal to 1;
the first history register values comprise history register values of the first display area at a target refresh rate under the plurality of brightness levels, the second history register values comprise history register values of the second display area at the target refresh rate under the plurality of brightness levels, and the target refresh rate comprises at least one refresh rate;
the determining the slope of the linear relationship according to the first history register values and the second history register values comprises:
determining, according to a history register value of the first display area at any xth refresh rate and under a yth brightness level and a history register value of the second display area at the xth refresh rate and under the yth brightness level, the slope of the linear relationship corresponding to the xth refresh rate and the yth brightness level;
the second register value comprises register values of the first display area under the first gray scale respectively corresponding to the plurality of brightness levels at the target refresh rate, the third register value comprises register values of the second display area under the first gray scale respectively corresponding to the plurality of brightness levels at the target refresh rate;
the determining the intercept of the linear relationship according to the second register value and the third register value comprises:
determining, according to register values of the first display area and the second display area under the first gray scale corresponding to the xth refresh rate and the yth brightness level, the intercept of the linear relationship corresponding to the xth refresh rate and the yth brightness level; and
the obtaining the linear relationship according to the slope and the intercept of the linear relationship comprises:
obtaining the linear relationship corresponding to the xth refresh rate and the yth brightness level according to the slope and the intercept of the linear relationship corresponding to the xth refresh rate and the yth brightness level, wherein x and y are both integers, each with a value greater than or equal to 1.

### Claim 7 (depends on 6)

The method according to claim 6, wherein the first register value comprises register values of the first display area under the target gray scale respectively corresponding to the plurality of brightness levels at the target refresh rate; and
the determining, according to the first register value and the predetermined linear relationship between register values of the first display area and register values of the second display area, the target register value of the second display area under the target gray scale comprises:
determining, according to the linear relationship corresponding to the xth refresh rate and the yth brightness level and a register value of the first display area under the target gray scale corresponding to the xth refresh rate and the yth brightness level, the target register value of the second display area under the target gray scale corresponding to the xth refresh rate and the yth brightness level.

### Claim 8 (depends on 7)

The method according to claim 7, wherein for sub-pixels of different colors, a target register value of a sub-pixel of each color in the second display area under the target gray scale corresponding to the xth refresh rate and the yth brightness level is determined according to the linear relationship corresponding to the sub-pixel of each color at the xth refresh rate and the yth brightness level and a register value of the sub-pixel of the color in the first display area of the display panel under the target gray scale corresponding to the xth refresh rate and the yth brightness level.

### Claim 9 (depends on 1)

The method according to claim 1, wherein a light transmittance of the first display area is different from a light transmittance of the second display area.

### Claim 10 (depends on 9)

The method according to claim 9, wherein the light transmittance of the first display area is less than the light transmittance of the second display area.

### Claim 11 (depends on 1)

A non-transitory computer-readable storage medium storing a computer program thereon, wherein the computer program, when executed by a processor, implements steps of the gamma tuning method according to claim 1.

### Claim 12

A gamma tuning apparatus, applied to a display panel comprising:
a first display area and a second display area, the gamma tuning apparatus comprising:
a first acquiring module, implemented by at least one processor and memory, configured to acquire a first register value of the first display area after gamma tuning under a target gray scale; and
a first determining module, implemented by the at least one processor and memory, configured to determine, according to the first register value and a predetermined linear relationship between register values of the first display area and register values of the second display area, a target register value of the second display area under the target gray scale;
wherein the first display area and the second display area respectively comprise sub-pixels of n colors, the first register value comprises first sub-register values corresponding to the sub-pixels of n colors in one-to-one correspondence, and n is an integer greater than or equal to 1; and
wherein the determining, according to the first register value and the predetermined linear relationship between register values of the first display area and register values of the second display area, the target register value of the second display area under the target gray scale comprises:
for a sub-pixel of any ith color of the sub-pixels of n colors, determining, according to the first sub-register value corresponding to the sub-pixel of the ith color and a linear relationship between a register value of the sub-pixel of the ith color in the first display area and a register value of the sub-pixel of the ith color in the second display area, a target register value of the sub-pixel of the ith color in the second display area under the target gray scale, wherein i is an integer greater than or equal to 1.