# US 9,520,093 B2 · Liquid crystal display device and driving method thereof

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- Number: US 9,520,093 B2
- Document ID: US9520093B2
- Status: Granted
- Kind: B2
- Application number: 14/428,361
- Filed: 2015-01-20
- Published: 2016-07-21
- Granted: 2016-12-13
- Earliest claimed: 2014-12-16
- Assignees: Shenzhen China Star Optoelectronics Technology Co., Ltd.
- Applicants: Shenzhen China Star Optoelectronics Technology Co., Ltd.
- Inventors: Lixuan Chen
- Web page: https://patentgrep.com/patent/US9520093B2

## 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 3/3611: {Control of matrices with row and column drivers}
- G09G 2300/0421: Structural details of the set of electrodes
- G09G 2310/08: Details of timing specific for flat panels, other than clock recovery
- G09G 2320/0242: Compensation of deficiencies in the appearance of colours
- 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 disclosure relates to a driving method of liquid crystal display panel. The liquid crystal display panel comprises a plurality of display units, the display unit comprises two adjacent pixel units. Wherein the driving method comprises: receiving input video data; determining that whether the input video data are within a plurality of video data intervals of predetermined complexion frame; if the input video data is within a certain video data intervals of predetermined complexion frame, then obtain high video data and low video data according to the input video data; providing the high video data to one of the pixel units, and providing the low video data to the other pixel units. The disclosure also relates to a liquid crystal display panel driven by the driving method.

## Claims

### Claim 1

A driving method of liquid crystal display panel, wherein the liquid crystal display panel comprises a plurality of display units, the display unit comprises two adjacent pixel units, the driving method comprising:
receiving input video data;
determining that whether the input video data are within a plurality of video data intervals of predetermined complexion frame;
if the input video data is within a certain video data intervals of predetermined complexion frame, then obtain high video data and low video data according to the input video data; and
providing the high video data to one of the pixel units, and providing the low video data to the other pixel units;
wherein the liquid crystal display panel further comprises a lookup table, the lookup table comprises a plurality of video data, high video data and low video data, the high video data and the low video data are divided from the video data, the step of obtaining corresponding high video data and low video data according to the input video data is: obtaining corresponding high video data and low video data of the input video data by finding the lookup table according to the input video data.

### Claim 2 (depends on 1)

The driving method of liquid crystal display panel according to claim 1, wherein if the input video data is not within any of the video data intervals of predetermined complexion frame, then provide the input video data to the pixel units.

### Claim 3 (depends on 1)

The driving method of liquid crystal display panel according to claim 1, wherein the input video data comprise input red gray scale values, input green gray scale values and input blue gray scale values, the plurality of video data intervals of predetermined complexion frame comprises intervals of red gray scale values, intervals of green gray scale values and intervals of blue gray scale values;
wherein the input video data being within a certain video data interval of predetermined complexion frame indicates that: the input red gray scale value is within a certain red gray scale interval of predetermined complexion frame, the input green gray scale value is within a certain green gray scale interval of predetermined complexion frame, and the input blue gray scale value is within a certain blue gray scale interval of predetermined complexion frame.

### Claim 4 (depends on 2)

The driving method of liquid crystal display panel according to claim 2, wherein the input video data comprise input red gray scale values, input green gray scale values and input blue gray scale values, the plurality of video data intervals of predetermined complexion frame comprises intervals of red gray scale values, intervals of green gray scale values and intervals of blue gray scale values;
wherein the input video data being not within any of the intervals of predetermined complexion frame indicates that: the input gray scale values of at least one color is not within any of the corresponding gray scale intervals of predetermined complexion frame.

### Claim 5 (depends on 1)

The driving method of liquid crystal display panel according to claim 1, wherein the high video data and the low video data are divided from the video data according to Formula 1,
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wherein obtain a minimum value from e(H,L), T indicates the video data, H indicates the high video data corresponding to the video data, L indicates the low video data corresponding to the video data, S indicates a predetermined threshold S, Lvα(H) indicates the corresponding brightness value of the image displayed by the video data T and the high video data H under a front view angle α, Lvα(L) indicates the corresponding brightness value of the image displayed by the video data T and the low video data L under the front view angle α, Lvα(T) indicates the brightness value of the image displayed by the video data T under the front view angle α, xβ(H,L) and yβ(H,L) indicate the chromaticity coordinates in CIE1931 system of the image displayed by the video data T under an oblique view angle β, as well as xα and yα indicates the chromaticity coordinates in CIE1931 system of the image displayed by the video data T under the front view angle α.

### Claim 6 (depends on 5)

The driving method of liquid crystal display panel according to claim 5, wherein the range of the predetermined threshold S is between 0.05 and 0.1.

### Claim 7 (depends on 5)

The driving method of liquid crystal display panel according to claim 5, wherein the front view angle α is 0°, and the oblique view angle β is between 30° and 80°.

### Claim 8 (depends on 7)

The driving method of liquid crystal display panel according to claim 7, wherein the oblique view angle β is 60°.

### Claim 9

A liquid crystal display panel, comprising a gate controller, a source controller and a pixel unit, the gate controller providing a scanning signal to the pixel unit by scan lines, the source controller providing a data signal to the pixel unit by data lines, wherein the driving method of the liquid crystal display panel comprises:
receiving input video data;
determining that whether the input video data are within a plurality of video data intervals of predetermined complexion frame;
if the input video data is within a certain video data intervals of predetermined complexion frame, then obtain high video data and low video data according to the input video data; and
providing the high video data to one of the pixel units, and providing the low video data to the other pixel units;
wherein the liquid crystal display panel further comprises a lookup table, the lookup table comprises a plurality of video data, high video data and low video data, the high video data and the low video data are divided from the video data, the step of obtaining corresponding high video data and low video data according to the input video data is: obtaining corresponding high video data and low video data of the input video data by finding the lookup table according to the input video data.

### Claim 10 (depends on 9)

The liquid crystal display panel according to claim 9, wherein if the input video data is not within any of the video data intervals of predetermined complexion frame, then provide the input video data to the pixel units.

### Claim 11 (depends on 9)

The liquid crystal display panel according to claim 9, wherein the input video data comprise input red gray scale values, input green gray scale values and input blue gray scale values, the plurality of video data intervals of predetermined complexion frame comprises intervals of red gray scale values, intervals of green gray scale values and intervals of blue gray scale values;
wherein the input video data being within a certain video data interval of predetermined complexion frame indicates that: the input red gray scale value is within a certain red gray scale interval of predetermined complexion frame, the input green gray scale value is within a certain green gray scale interval of predetermined complexion frame, and the input blue gray scale value is within a certain blue gray scale interval of predetermined complexion frame.

### Claim 12 (depends on 9)

The liquid crystal display panel according to claim 9, wherein the input video data comprise input red gray scale values, input green gray scale values and input blue gray scale values, the plurality of video data intervals of predetermined complexion frame comprises intervals of red gray scale values, intervals of green gray scale values and intervals of blue gray scale values;
wherein the input video data being not within any of the intervals of predetermined complexion frame indicates that: the input gray scale values of at least one color is not within any of the corresponding gray scale intervals of predetermined complexion frame.

### Claim 13 (depends on 9)

The liquid crystal display panel according to claim 9, wherein the high video data and the low video data are divided from the video data according to Formula 1,
Δ
⁡
(
H
,
L
)
=
abs
⁡
(
Lv
⁢
⁢
α
⁡
(
H
)
+
Lv
⁢
⁢
α
⁡
(
L
)
-
Lv
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α
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α
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y
β
⁡
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L
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-
y
α
)
2
,
[
Formula
⁢
⁢
1
]
wherein obtain a minimum value from e(H,L), T indicates the video data, H indicates the high video data corresponding to the video data, L indicates the low video data corresponding to the video data, S indicates a predetermined threshold S, Lvα(H) indicates the corresponding brightness value of the image displayed by the video data T and the high video data H under a front view angle α, Lvα(L) indicates the corresponding brightness value of the image displayed by the video data T and the low video data L under the front view angle α, Lvα(T) indicates the brightness value of the image displayed by the video data T under the front view angle α, xβ(H,L) and yβ(H,L) indicate the chromaticity coordinates in CIE1931 system of the image displayed by the video data T under an oblique view angle β, as well as xα and yα indicates the chromaticity coordinates in CIE1931 system of the image displayed by the video data T under the front view angle α.

### Claim 14 (depends on 13)

The liquid crystal display panel according to claim 13, wherein the range of the predetermined threshold S is between 0.05 and 0.1.

### Claim 15 (depends on 13)

The liquid crystal display panel according to claim 13, wherein the front view angle α is 0°, and the oblique view angle β is between 30° and 80°.

### Claim 16 (depends on 15)

The liquid crystal display panel according to claim 15, wherein the oblique view angle β is 60°.