# US 11,443,677 B2 · Display panel, display method thereof, and display apparatus

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- Number: US 11,443,677 B2
- Document ID: US11443677B2
- Status: Granted
- Kind: B2
- Application number: 16/772,312
- Filed: 2020-02-19
- Published: 2021-07-22
- Granted: 2022-09-13
- Earliest claimed: 2019-03-18
- Assignees: Beijing BOE Technology Development Co., Ltd.
- Applicants: Boe Technology Group Co., Ltd.
- Inventors: Dongxu Han; Chi Zhang; Tieshi Wang; Zhongyuan Wu; Yongqian Li; Jinxia Hu
- Web page: https://patentgrep.com/patent/US11443677B2

## CPC

- G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters}
- G09G 3/2003: {Display of colours (specific for liquid crystal displays G09G3/3607)}
- G09G 3/3208: organic, e.g. using organic light-emitting diodes [OLED]
- G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
- G09G 2320/0242: Compensation of deficiencies in the appearance of colours
- G09G 2330/021: Power management, e.g. power saving
- G09G 2340/06: Colour space transformation
- G09G 2360/16: Calculation or use of calculated indices related to luminance levels in display data
- 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

The present disclosure relates to a display method of a display panel. The display method may include obtaining original luminance of three single color subpixels in each of the pixel units based on an image to be displayed; obtaining luminance compensation values of the three single color subpixels that need to be color compensated at a time of obtaining the luminance of the mixed color subpixel as the first substitute luminance; calculating luminance of the mixed color produced by the three single color subpixels in the pixel unit respectively based on each of the luminance of the three single color subpixels after color compensation; and setting input luminance of the single color subpixel having the smallest luminance of the mixed color as 0, and obtaining actual luminance of the other single color subpixels and the mixed color subpixel.

## Claims

### Claim 1

A display method of a display panel, wherein the display panel comprises a plurality of pixel units, each of the pixel units comprises a mixed color subpixel and three single color subpixels, and lights emitted by the three single color subpixels are capable of being mixed to produce a light of a mixed color produced by the mixed color subpixel, the display method comprising:
obtaining original luminance of the three single color subpixels in each of the pixel units based on an image to be displayed, calculating luminance of a mixed color produced by the three single color subpixels based on a smallest luminance among the original luminance of the three single color subpixels, and obtaining a first substitute luminance of the mixed color subpixel based on the luminance of the mixed color, and first substitute luminance of the three single color subpixels except for the one having the smallest luminance, wherein one of the three single color subpixels which has the smallest luminance of the mixed color is denoted by A1, the other two of the three single color subpixels are denoted by A2 and A3, the first substitute luminance of A2 is obtained by subtracting luminance contributed by A2 in the mixed color based on A1 from the original luminance of A2, and the first substitute luminance of A3 is obtained by subtracting luminance contributed by A3 in the mixed color based on A1 from the original luminance of A3;
obtaining luminance compensation values of the three single color subpixels that need to be color compensated at a time of obtaining the luminance of the mixed color subpixel as the first substitute luminance, based on pre-stored color compensation ratios of the three single color subpixels, so as to obtain luminance of the three single color subpixels after color compensation;
calculating luminance of the mixed color produced by the three single color subpixels in the pixel unit respectively based on each of the luminance of the three single color subpixels after color compensation, based on pre-stored ratios of the lights emitted by the three single color subpixels mixed to produce the light of the mixed color emitted by the actual mixed color subpixel, wherein the smallest luminance of the mixed color is denoted by L11; and
setting input luminance of A1 as 0, and obtaining actual luminance of A2, A3, and the mixed color subpixel based on L11, the pre-stored ratios of the lights emitted by the three single color subpixels mixed to produce the light of the mixed color emitted by the actual mixed color subpixel, the luminance of A2 and A3 after color compensation, and the first substitute luminance of the mixed color subpixel, and performing data input;
wherein the method further comprises, before calculating the luminance of the mixed color produced by the three single color subpixels:
obtaining chromaticity coordinates of the three single color subpixels and the mixed color subpixel in the display panel at given output luminance;
calculating ratios of the lights produced by the three single color subpixels mixed to produce the light of the mixed color emitted by the target mixed color subpixel, which are denoted by RatioAX1, RatioAX2, And RatioAX3 respectively, through a color mixing formula and based on chromaticity coordinate of a target mixed color subpixel;
calculating ratios of the lights produced by the three single color subpixels mixed to produce the light of the mixed color emitted by the actual mixed color subpixel, which are denoted by RatioBX1, RatioBX2, And RatioBX3 respectively, based on the chromaticity coordinates of the three single color subpixels and the chromaticity coordinate of the mixed color subpixel;
calculating the color compensation ratios of the three single color subpixels, which are denoted by gainX1, gainX2, and gainX3 respectively, based on RatioAX1, RatioAX2, RatioAX3, RatioBX1, RatioBX2, and RatioBX3; and
storing RatioBX1, RatioBX2, RatioBX3, gainX1, gainX2, and gainX3.

### Claim 2 (depends on 1)

The display method according to claim 1, wherein calculating luminance of the mixed color produced by the three single color subpixels in the pixel unit respectively based on each of the luminance of the three single color subpixels after color compensation further comprises:
calculating the luminance of the mixed color produced by the three single color subpixels according to the following formulas:
L11=L1/RatioBX1,
L12=L2/RatioBX2,
L13=L3/RatioBX3,
where L11, L12, and L13 are the luminance of the mixed color produced by A1, A2, and A3 based on each of the luminance of A1, A2, and A3 after color compensation, respectively.

### Claim 3 (depends on 2)

The display method according to claim 2, wherein setting input luminance of A1 as 0, and obtaining actual luminance of A2, A3, and the mixed color subpixel based on L11, the pre-stored ratios of the lights emitted by the three single color subpixels mixed to produce the light of the mixed color emitted by the actual mixed color subpixel, the luminance of A2 and A3 after color compensation, and the first substitute luminance of the mixed color subpixel, and performing data input comprises:
setting the input luminance of A1 as 0, and calculating and storing the actual luminance of A2, A3, and the mixed color subpixel according to the following formulas:
L10′=L11+L10
L12′=L12−L11/RatioBX2
L13′=L13−L11/RatioBX3
where L10 represents the first substitute luminance of the mixed color subpixel, L10′ represents the actual luminance of the mixed color subpixel, L12′ represents the actual luminance of A2, and L13′ is the actual luminance of A3.

### Claim 4 (depends on 3)

The display method according to claim 3, wherein at most three subpixels among the mixed color subpixel and the three single color subpixels in each of the pixel units illuminate at the same time for display.

### Claim 5 (depends on 1)

The display method according to claim 1, wherein the three single color subpixels in each of the pixel units comprises a red subpixel, a green subpixel, and a blue subpixel, and the mixed color subpixel comprises a white subpixel.

### Claim 6

A display panel, comprising:
a plurality of pixel units, wherein each of the pixel units comprises a mixed color subpixel and three single color subpixels, and lights emitted by the three single color subpixels are capable of being mixed to produce a light of a mixed color produced by the mixed color subpixel;
a first calculating processor configured to obtain original luminance of the three single color subpixels in each of the pixel units based on an image to be displayed, calculate luminance of a mixed color produced by the three single color subpixels based on the smallest luminance among the original luminance the three single color subpixels, and obtain first substitute luminance of the mixed color subpixel based on the luminance of the mixed color, and first substitute luminance of the three single color subpixels except for the one having the smallest luminance, wherein one of the three single color subpixels which has the smallest luminance of the mixed color is denoted by A1, the other two of the three single color subpixels are denoted by A2 and A3, the first substitute luminance of A2 is obtained by subtracting luminance contributed by A2 in the mixed color based on A1 from the original luminance of A2, and the first substitute luminance of A3 is obtained by subtracting luminance contributed by A3 in the mixed color based on A1 from the original luminance of A3;
a second calculating processor, configured to obtain luminance compensation values of the three single color subpixels that need to be color compensated at a time of obtaining the luminance of the mixed color subpixel as the first substitute luminance, based on pre-stored color compensation ratios of the three single color subpixels, so as to obtain luminance of the three single color subpixels after color compensation;
a third calculating processor, configured to calculate luminance of the mixed color produced by the three single color subpixels in the pixel unit based on each of the luminance of the three single color subpixels after color compensation respectively, based on pre-stored ratios of the lights emitted by the three single color subpixels mixed to produce the light of the mixed color emitted by the actual mixed color subpixel, wherein the smallest luminance of the mixed color is denoted by L11; and
a data writing processor, configured to set input luminance of A1 as 0, and obtain actual luminance of A2, A3, and the mixed color subpixel based on L11, the pre-stored ratios of the lights emitted by the three single color subpixels mixed to produce the light of the mixed color emitted by the actual mixed color subpixel, the luminance of A2 and A3 after color compensation, and the first substitute luminance of the mixed color subpixel, and perform data input;
wherein the display panel further comprises:
an acquisition processor, configured to obtain chromaticity coordinates of the three single color subpixels and the mixed color subpixel in the display panel at given output luminance;
a fourth calculating processor, configured to calculate ratios of the lights produced by the three single color subpixels mixed to produce the light of the mixed color emitted by the target mixed color subpixel, which are denoted by RatioAX1, RatioAX2, And RatioAX3 respectively, through a color mixing formula and based on chromaticity coordinate of a target mixed color subpixel; calculate ratios of the lights produced by the three single color subpixels mixed to produce the light of the mixed color emitted by the actual mixed color subpixel, which are denoted by RatioBX1, RatioBX2, And RatioBX3 respectively, based on the chromaticity coordinates of the three single color subpixels and the chromaticity coordinate of the mixed color subpixel; and calculate the color compensation ratios of the three single color subpixels, which are denoted by gainX1, gainX2, and gainX3 respectively, based on RatioAX1, RatioAX2, RatioAX3, RatioBX1, RatioBX2, and RatioBX3; and
a storage processor, configured to store RatioBX1, RatioBX2, RatioBX3, gainX1, gainX2, and gainX3.

### Claim 7 (depends on 6)

The display panel according to claim 6, wherein the third calculating processor is configured to calculate the luminance of the mixed color produced by the three single color subpixels in the pixel unit respectively based on each of the luminance of the three single color subpixels after color compensation according to the following formulas:
L11=L1/RatioBX1
L12=L2/RatioBX2
L13=L3/RatioBX3
where L11, L12, and L13 are the luminance of the mixed color produced by A1, A2, and A3 based on each of the luminance of A1, A2, and A3 after color compensation, respectively.

### Claim 8 (depends on 7)

The display panel according to claim 7, wherein the data writing processor is configured to setting input luminance of A1 as 0, and calculate and store the actual luminance of A2, A3, and the mixed color subpixel according to the following formulas:
L10′=L11+L10
L12′=L12−L11RatioBX2
L13′=L13−L11/RatioBX3
where L10 represents the first substitute luminance of the mixed color subpixel, L10′ represents the actual luminance of the mixed color subpixel, L12′ represents the actual luminance of A2, and L13′ is the actual luminance of A3.

### Claim 9 (depends on 6)

The display panel according to claim 6, wherein the three single color subpixels in each of the pixel units comprise a red subpixel, a green subpixel, and a blue subpixel; and the mixed color subpixel comprises a white subpixel.

### Claim 10 (depends on 6)

The display panel according to claim 6, wherein at most three subpixels among the mixed color subpixel and the three single color subpixels in each of the pixel units illuminate at the same time for display.

### Claim 11 (depends on 6)

A display apparatus, comprising the display panel of claim 6.

### Claim 12

A non-transitory computer readable storage medium having stored thereon computer program instructions, wherein when the computer program instructions are executed by a processor, a display method of a display panel is implemented, wherein the display panel comprises a plurality of pixel units, each of the pixel units comprises a mixed color subpixel and three single color subpixels, and lights emitted by the three single color subpixels are capable of being mixed to produce a light of a mixed color produced by the mixed color subpixel, the display method comprising:
obtaining original luminance of the three single color subpixels in each of the pixel units based on an image to be displayed, calculating luminance of a mixed color produced by the three single color subpixels based on a smallest luminance among the original luminance of the three single color subpixels, and obtaining a first substitute luminance of the mixed color subpixel based on the luminance of the mixed color, and first substitute luminance of the three single color subpixels except for the one having the smallest luminance, wherein one of the three single color subpixels which has the smallest luminance of the mixed color is denoted by A1, the other two of the three single color subpixels are denoted by A2 and A3, the first substitute luminance of A2 is obtained by subtracting luminance contributed by A2 in the mixed color based on A1 from the original luminance of A2, and the first substitute luminance of A3 is obtained by subtracting luminance contributed by A3 in the mixed color based on A1 from the original luminance of A3;
obtaining luminance compensation values of the three single color subpixels that need to be color compensated at a time of obtaining the luminance of the mixed color subpixel as the first substitute luminance, based on pre-stored color compensation ratios of the three single color subpixels, so as to obtain luminance of the three single color subpixels after color compensation;
calculating luminance of the mixed color produced by the three single color subpixels in the pixel unit respectively based on each of the luminance of the three single color subpixels after color compensation, based on pre-stored ratios of the lights emitted by the three single color subpixels mixed to produce the light of the mixed color emitted by the actual mixed color subpixel, wherein the smallest luminance of the mixed color is denoted by L11; and
setting input luminance of A1 as 0, and obtaining actual luminance of A2, A3, and the mixed color subpixel based on L11, the pre-stored ratios of the lights emitted by the three single color subpixels mixed to produce the light of the mixed color emitted by the actual mixed color subpixel, the luminance of A2 and A3 after color compensation, and the first substitute luminance of the mixed color subpixel, and performing data input;
wherein the non-transitory computer readable storage medium further comprises, before calculating the luminance of the mixed color produced by the three single color subpixels:
obtaining chromaticity coordinates of the three single color subpixels and the mixed color subpixel in the display panel at given output luminance;
calculating ratios of the lights produced by the three single color subpixels mixed to produce the light of the mixed color emitted by the target mixed color subpixel, which are denoted by RatioAX1, RatioAX2, And RatioAX3 respectively, through a color mixing formula and based on chromaticity coordinate of a target mixed color subpixel;
calculating ratios of the lights produced by the three single color subpixels mixed to produce the light of the mixed color emitted by the actual mixed color subpixel, which are denoted by RatioBX1, RatioBX2, And RatioBX3 respectively, based on the chromaticity coordinates of the three single color subpixels and the chromaticity coordinate of the mixed color subpixel;
calculating the color compensation ratios of the three single color subpixels, which are denoted by gainX1, gainX2, and gainX3 respectively, based on RatioAX1, RatioAX2, RatioAX3, RatioBX1, RatioBX2, and RatioBX3, and
storing RatioBX1, RatioBX2, RatioBX3, gainX1, gainX2, and gainX3.

### Claim 13 (depends on 12)

The non-transitory computer readable storage medium according to claim 12, wherein calculating luminance of the mixed color produced by the three single color subpixels in the pixel unit respectively based on each of the luminance of the three single color subpixels after color compensation further comprises:
calculating the luminance of the mixed color produced by the three single color subpixels according to the following formulas:
L11=L1/RatioBX1,
L12=L2/RatioBX2,
L13=L3/RatioBX3,
where L11, L12, and L13 are the luminance of the mixed color produced by A1, A2, and A3 based on each of the luminance of A1, A2, and A3 after color compensation, respectively.

### Claim 14 (depends on 13)

The non-transitory computer readable storage medium according to claim 13, wherein setting input luminance of A1 as 0, and obtaining actual luminance of A2, A3, and the mixed color subpixel based on L11, the pre-stored ratios of the lights emitted by the three single color subpixels mixed to produce the light of the mixed color emitted by the actual mixed color subpixel, the luminance of A2 and A3 after color compensation, and the first substitute luminance of the mixed color subpixel, and performing data input comprises:
setting the input luminance of A1 as 0, and calculating and storing the actual luminance of A2, A3, and the mixed color subpixel according to the following formulas:
L10′=L11+L10
L12′=L12−L11/RatioBX2
L13′=L13−L11/RatioBX3
where L10 represents the first substitute luminance of the mixed color subpixel, L10′ represents the actual luminance of the mixed color subpixel, L12′ represents the actual luminance of A2, and L13′ is the actual luminance of A3.

### Claim 15 (depends on 14)

The non-transitory computer readable storage medium according to claim 14, wherein the white subpixel and only two of the three single color subpixels illuminate to produce a color based on the original luminance of the three single color subpixels in each of the pixel units.

### Claim 16 (depends on 12)

The non-transitory computer readable storage medium according to claim 12, wherein the three single color subpixels in each of the pixel units comprises a red subpixel, a green subpixel, and a blue subpixel, and the mixed color subpixel comprises a white subpixel.

### Claim 17 (depends on 12)

The non-transitory computer readable storage medium according to claim 12, wherein at most three subpixels among the mixed color subpixel and the three single color subpixels in each of the pixel units illuminate at the same time for display.