# US 9,437,144 B2 · Liquid crystal display panel, image displaying method and image displaying system

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- Number: US 9,437,144 B2
- Document ID: US9437144B2
- Status: Granted
- Kind: B2
- Application number: 14/363,303
- Filed: 2014-05-14
- Published: 2015-11-12
- Granted: 2016-09-06
- Earliest claimed: 2014-05-12
- Assignees: Shenzhen China Star Optoelectronics Technology Co., Ltd.
- Applicants: Shenzhen China Star Optoelectronics Technology Co., Ltd.
- Inventors: Lixuan Chen; Chih-tsung Kang
- Web page: https://patentgrep.com/patent/US9437144B2

## CPC

- G09G 3/3607: {for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels (display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127)}
- G09G 3/36: using liquid crystals
- G09G 5/005: {Adapting incoming signals to the display format of the display terminal}
- G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
- G09G 2340/06: Colour space transformation
- 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 invention relates to an image displaying method including: providing a liquid crystal display panel with multiple three-pixel display units, each three-pixel display unit including a first red sub-pixel unit, a first green sub-pixel unit and a first blue sub-pixel unit; demarcating a display region of the liquid crystal display panel to form multiple four-pixel display units, each four-pixel display unit including four the three-pixel display units; and providing four-pixel data signals of image including a red pixel data signal, a green pixel data signal, a blue pixel data signal and a fourth pixel data signal inputted to the liquid crystal display panel and thereby displaying the image thereon. The present invention also provides an image displaying system for carrying out the image displaying method.

## Claims

### Claim 1

An image displaying method, comprising:
providing a liquid crystal display panel, wherein the liquid crystal display panel comprises a plurality of three-pixel display units, each of the plurality of three-pixel display units comprises a first red sub-pixel unit, a first green sub-pixel unit and a first blue sub-pixel unit;
demarcating a display region on the liquid crystal display panel to form a plurality of four-pixel display units, wherein each of the plurality of four-pixel display units comprises four of the three-pixel display units, and the four three-pixel display units are a second red sub-pixel unit, a second green sub-pixel unit, a second blue sub-pixel unit, and a fourth sub-pixel unit, respectively;
providing four-pixel data signals of an image comprising a red pixel data signal, a green pixel data signal, a blue pixel data signal and a fourth pixel data signal respectively inputted to the second red sub-pixel unit, the second green sub-pixel unit, the second blue sub-pixel unit and the fourth sub-pixel unit, and thereby displaying the image on the liquid crystal display panel.

### Claim 2 (depends on 1)

The image displaying method according to claim 1, wherein the fourth pixel data signal is a white pixel data signal or a yellow pixel data signal, and correspondingly the four-pixel data signals are RGBW data signals or RGBY data signals.

### Claim 3 (depends on 2)

The image displaying method according to claim 2, wherein the four three-pixel display units in the four-pixel display unit are arranged in a rectangle form or in a strip form.

### Claim 4 (depends on 1)

The image displaying method according to claim 1, wherein the red pixel data signal is inputted to the first red sub-pixel unit of the second red sub-pixel unit, the green pixel data signal is inputted to the first green sub-pixel unit of the second green sub-pixel unit, the blue pixel data signal is inputted to the first blue sub-pixel unit of the second blue sub-pixel unit, and the fourth pixel data signal is inputted to the first red sub-pixel unit, the first green sub-pixel unit and the first blue sub-pixel unit of the fourth sub-pixel unit; the gray scale of the fourth pixel data signal X(gray)=a×R(gray)+b×G(gray)+c×B(gray), where R(gray), G(gray) and B(gray) respectively represent gray scales of the red pixel data signal, the green pixel data signal and the blue pixel data signal, and a, b, c are constant.

### Claim 5 (depends on 4)

The image displaying method according to claim 4, wherein a calculating process of the gray scale X(gray) of the fourth pixel data signal comprises:
firstly setting a luminance of the fourth pixel data signal Lv(X)=k×(Lv(R)+Lv(G)+Lv(B)) and a chrominance of the fourth pixel data signal x(X)=f(x(R)+x(G)+x(B)), y(X)=f(y(R)+y(G)+y(B)); and
afterwards, carrying out a white balance calculation to obtain the gray scale of the fourth pixel data signal X(gray)=a×R(gray)+b×G(gray)+c×B(gray), where,
f is a function representative of converting three-pixel data signals of the image into four-pixel data signals of the image;
Lv(R), Lv(G) and Lv(B) respectively represent a red pixel data signal, a green pixel data signal and a blue pixel data signal;
x(R), x(G) and x(B) respectively represent horizontal coordinate values in the chromaticity coordinates system of the red pixel data signal, the green pixel data signal and the blue pixel data signal, y(R), y(G) and y(B) respectively represent longitudinal coordinate values in the chromaticity coordinates system of the red pixel data signal, the green pixel data signal and the blue pixel data signal.

### Claim 6 (depends on 2)

The image displaying method according to claim 2, wherein the red pixel data signal is inputted to the first red sub-pixel unit of the second red sub-pixel unit, the green pixel data signal is inputted to the first green sub-pixel unit of the second green sub-pixel unit, the blue pixel data signal is inputted to the first blue sub-pixel unit of the second blue sub-pixel unit, and the fourth pixel data signal is inputted to the first red sub-pixel unit, the first green sub-pixel unit and the first blue sub-pixel unit of the fourth sub-pixel unit; the gray scale of the fourth pixel data signal X(gray)=a×R(gray)+b×G(gray)+c×B(gray), where R(gray), G(gray) and B(gray) respectively represent gray scales of the red pixel data signal, the green pixel data signal and the blue pixel data signal, and a, b, c are constant.

### Claim 7 (depends on 6)

The image displaying method according to claim 6, wherein a calculating process of the gray scale X(gray) of the fourth pixel data signal comprises:
firstly setting a luminance of the fourth pixel data signal Lv(X)=k×(Lv(R)+Lv(G)+Lv(B)) and a chrominance of the fourth pixel data signal x(X)=f(x(R)+x(G)+x(B)), y(X)=f(y(R)+y(G)+y(B)); and
afterwards, carrying out a white balance calculation to obtain the gray scale of the fourth pixel data signal X(gray)=a×R(gray)+b×G(gray)+c×B(gray), where,
f is a function representative of converting three-pixel data signals of the image into four-pixel data signals of the image;
Lv(R), Lv(G) and Lv(B) respectively represent a red pixel data signal, a green pixel data signal and a blue pixel data signal;
x(R), x(G) and x(B) respectively represent horizontal coordinate values in the chromaticity coordinates system of the red pixel data signal, the green pixel data signal and the blue pixel data signal, y(R), y(G) and y(B) respectively represent longitudinal coordinate values in the chromaticity coordinates system of the red pixel data signal, the green pixel data signal and the blue pixel data signal.

### Claim 8 (depends on 3)

The image displaying method according to claim 3, wherein the red pixel data signal is inputted to the first red sub-pixel unit of the second red sub-pixel unit, the green pixel data signal is inputted to the first green sub-pixel unit of the second green sub-pixel unit, the blue pixel data signal is inputted to the first blue sub-pixel unit of the second blue sub-pixel unit, and the fourth pixel data signal is inputted to the first red sub-pixel unit, the first green sub-pixel unit and the first blue sub-pixel unit of the fourth sub-pixel unit; the gray scale of the fourth pixel data signal X(gray)=a×R(gray)+b×G(gray)+c×B(gray), where R(gray), G(gray) and B(gray) respectively represent gray scales of the red pixel data signal, the green pixel data signal and the blue pixel data signal, and a, b, c are constant.

### Claim 9 (depends on 8)

The image displaying method according to claim 8, wherein a calculating process of the gray scale X(gray) of the fourth pixel data signal comprises:
firstly setting a luminance of the fourth pixel data signal Lv(X)=k×(Lv(R)+Lv(G)+Lv(B)) and a chrominance of the fourth pixel data signal x(X)=f(x(R)+x(G)+x(B)), y(X)=f(y(R)+y(G)+y(B)); and
afterwards, carrying out a white balance calculation to obtain the gray scale of the fourth pixel data signal X(gray)=a×R(gray)+b×G(gray)+c×B (gray), where,
f is a function representative of converting three-pixel data signals of the image into four-pixel data signals of the image;
Lv(R), Lv(G) and Lv(B) respectively represent a red pixel data signal, a green pixel data signal and a blue pixel data signal;
x(R), x(G) and x(B) respectively represent horizontal coordinate values in the chromaticity coordinates system of the red pixel data signal, the green pixel data signal and the blue pixel data signal, y(R), y(G) and y(B) respectively represent longitudinal coordinate values in the chromaticity coordinates system of the red pixel data signal, the green pixel data signal and the blue pixel data signal.

### Claim 10

An image displaying system, comprising:
a liquid crystal display panel, wherein the liquid crystal display panel comprises a plurality of three-pixel display units, each of the plurality of three-pixel display units comprises a first red sub-pixel unit, a first green sub-pixel unit and a first blue sub-pixel unit, and the liquid crystal display panel further is demarcated to form a plurality of four-pixel display units, each of the plurality of four-pixel display units comprises four of the three-pixel display units, and the four three-pixel display units are a second red sub-pixel unit, a second green sub-pixel unit, a second blue sub-pixel unit, and a fourth sub-pixel unit, respectively;
a data signal receiving unit, configured for receiving three-pixel data signals of an image including a red pixel data signal, a green pixel data signal and a blue pixel data signal; and
a data signal processing unit, coupled to the data signal receiving unit and configured for simulating four-pixel data signals of the image according to the three-pixel data signals of the image including generating gray scales of a red pixel data signal, a green pixel data signal and a blue pixel data signal according to luminance and chrominance of the red pixel data signal, the green pixel data signal and the blue pixel data signal and thereby calculating a gray scale of a fourth pixel data signal, wherein the gray scale of the fourth pixel data signal X(gray)=a×R(gray)+b×G(gray)+c×B(gray), where R(gray), G(gray) and B(gray) respectively represent the gray scales of the red pixel data signal, the green pixel data signal and the blue pixel data signal, and a, b, c are constant;
wherein the liquid crystal display panel is coupled to the data signal processing unit and configured for displaying the image according to the gray scales of the red pixel data signal, the green pixel data signal, the blue pixel data signal and the fourth pixel data signal.

### Claim 11 (depends on 10)

The image displaying system according to claim 10, wherein the fourth pixel data signal is a white pixel data signal or a yellow pixel data signal, and correspondingly the four-pixel data signals are RGBW data signals or RGBY data signals.

### Claim 12 (depends on 11)

The image displaying system according to claim 11, wherein the four three-pixel display units in the four-pixel display unit are arranged in a rectangle form or in a strip form.

### Claim 13 (depends on 10)

The image displaying system according to claim 10, wherein the red pixel data signal is inputted to the first red sub-pixel unit of the second red sub-pixel unit, the green pixel data signal is inputted to the first green sub-pixel unit of the second green sub-pixel unit, the blue pixel data signal is inputted to the first blue sub-pixel unit of the second blue sub-pixel unit, and the fourth pixel data signal is inputted to the first red sub-pixel unit, the first green sub-pixel unit and the first blue sub-pixel unit of the fourth sub-pixel unit.

### Claim 14 (depends on 13)

The image displaying system according to claim 13, wherein a calculating process of the gray scale X(gray) of the fourth pixel data signal carried out by the data signal processing unit comprises:
firstly setting a luminance of the fourth pixel data signal Lv(X)=k×(Lv(R)+Lv(G)+Lv(B)) and a chrominance of the fourth pixel data signal x(X)=f(x(R)+x(G)+x(B)), y(X)=f(y(R)+y(G)+y(B)); and
afterwards, carrying out a white balance calculation to obtain the gray scale of the fourth pixel data signal X(gray)=axR(gray)+b xG(gray)+cxB(gray), where, f is a function representative of converting three-pixel data signals of the image into four-pixel data signals of the image;
Lv(R), Lv(G) and Lv(B) respectively represent a red pixel data signal, a green pixel data signal and a blue pixel data signal;
x(R), x(G) and x(B) respectively represent horizontal coordinate values in the chromaticity coordinates system of the red pixel data signal, the green pixel data signal and the blue pixel data signal, y(R), y(G) and y(B) respectively represent longitudinal coordinate values in the chromaticity coordinates system of the red pixel data signal, the green pixel data signal and the blue pixel data signal.

### Claim 15 (depends on 11)

The image displaying system according to claim 11, wherein the red pixel data signal is inputted to the first red sub-pixel unit of the second red sub-pixel unit, the green pixel data signal is inputted to the first green sub-pixel unit of the second green sub-pixel unit, the blue pixel data signal is inputted to the first blue sub-pixel unit of the second blue sub-pixel unit, and the fourth pixel data signal is inputted to the first red sub-pixel unit, the first green sub-pixel unit and the first blue sub-pixel unit of the fourth sub-pixel unit.

### Claim 16 (depends on 15)

The image displaying system according to claim 15, wherein a calculating process of the gray scale X(gray) of the fourth pixel data signal carried out by the data signal processing unit comprises:
firstly setting a luminance of the fourth pixel data signal Lv(X)=k×(Lv(R)+Lv(G)+Lv(B)) and a chrominance of the fourth pixel data signal x(X)=f(x(R)+x(G)+x(B)), y(X)=f(y(R)+y(G)+y(B)); and
afterwards, carrying out a white balance calculation to obtain the gray scale of the fourth pixel data signal X(gray)=a×R(gray)+b×G(gray)+c×B (gray), where,
f is a function representative of converting three-pixel data signals of the image into four-pixel data signals of the image;
Lv(R), Lv(G) and Lv(B) respectively represent a red pixel data signal, a green pixel data signal and a blue pixel data signal;
x(R), x(G) and x(B) respectively represent horizontal coordinate values in the chromaticity coordinates system of the red pixel data signal, the green pixel data signal and the blue pixel data signal, y(R), y(G) and y(B) respectively represent longitudinal coordinate values in the chromaticity coordinates system of the red pixel data signal, the green pixel data signal and the blue pixel data signal.

### Claim 17 (depends on 12)

The image displaying system according to claim 12, wherein the red pixel data signal is inputted to the first red sub-pixel unit of the second red sub-pixel unit, the green pixel data signal is inputted to the first green sub-pixel unit of the second green sub-pixel unit, the blue pixel data signal is inputted to the first blue sub-pixel unit of the second blue sub-pixel unit, and the fourth pixel data signal is inputted to the first red sub-pixel unit, the first green sub-pixel unit and the first blue sub-pixel unit of the fourth sub-pixel unit.

### Claim 18 (depends on 17)

The image displaying system according to claim 17, wherein a calculating process of the gray scale X(gray) of the fourth pixel data signal carried out by the data signal processing unit comprises:
firstly setting a luminance of the fourth pixel data signal Lv(X)=k×(Lv(R)+Lv(G)+Lv(B)) and a chrominance of the fourth pixel data signal x(X)=f(x(R)+x(G)+x(B)), y(X)=f(y(R)+y(G)+y(B)); and
afterwards, carrying out a white balance calculation to obtain the gray scale of the fourth pixel data signal X(gray)=a×R(gray)+b×G(gray)+c×B (gray), where, f is a function representative of converting three-pixel data signals of the image into four-pixel data signals of the image;
Lv(R), Lv(G) and Ly(B) respectively represent a red pixel data signal, a green pixel data signal and a blue pixel data signal;
x(R), x(G) and x(B) respectively represent horizontal coordinate values in the chromaticity coordinates system of the red pixel data signal, the green pixel data signal and the blue pixel data signal, y(R), y(G) and y(B) respectively represent longitudinal coordinate values in the chromaticity coordinates system of the red pixel data signal, the green pixel data signal and the blue pixel data signal.