# US 10,319,280 B2 · Display device and driving method thereof

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- Number: US 10,319,280 B2
- Document ID: US10319280B2
- Status: Granted
- Kind: B2
- Application number: 14/994,041
- Filed: 2016-01-12
- Published: 2016-12-15
- Granted: 2019-06-11
- Earliest claimed: 2015-06-10
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Il Nam Kim; Won Sang Park; Gee Bum Kim; Ki Seo Kim
- Web page: https://patentgrep.com/patent/US10319280B2

## CPC

- G09G 3/2092: {Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto (suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165)}
- G09G 5/04: using circuits for interfacing with colour displays
- G09G 2320/0242: Compensation of deficiencies in the appearance of colours
- G09G 2320/0666: for control of colour parameters, e.g. colour temperature
- 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

There is provided a display device including a display panel including pixels, and a display panel driver configured to drive the display panel, wherein the display panel driver includes a timing controller configured to receive image signals and timing signals from the outside, to convert at least some of the image signals, and to output the converted image signals, wherein the image signals include first image signals corresponding to a first area in the display panel, wherein each of image signals corresponds to each of the pixels and includes a red signal, a green signal, and a blue signal, wherein the timing controller includes a signal receiver configured to receive the image signals and the timing signals, and a first converter configured to receive the first image signals from the signal receiver, to perform color weakness-compensating conversion on the first image signals, and to output the converted first image signals.

## Claims

### Claim 1

A display device comprising:
a display panel comprising pixels; and
a display panel driver configured to drive the display panel,
wherein the display panel driver comprises a timing controller configured to receive image signals and timing signals from the outside, to convert at least some of the image signals, and to output the converted image signals, each of the image signals corresponding to a respective one of the pixels,
wherein the image signals comprise first image signals corresponding to a first area in the display panel,
wherein each of image signals corresponds to each of the pixels and comprises a red signal, a green signal, and a blue signal,
wherein the timing controller comprises a signal receiver configured to receive the image signals and the timing signals, and a first converter configured to receive the first image signals from the signal receiver, to perform color weakness-compensating conversion on the first image signals, and to output the converted first image signals,
wherein the timing controller further comprises a selection signal generator configured to generate selection signals, and the selection signals corresponding to the first area defined by coordinate information received from outside have a first logic value,
wherein the selection signal generator is further configured to receive the coordinate information comprising a first direction start coordinate, a first direction end coordinate, a second direction start coordinate, and a second direction end coordinate, and
wherein each one of the first and second start coordinates and the first and second end coordinates corresponds to a respective one of the pixels.

### Claim 2 (depends on 1)

The display device of claim 1, wherein the red signal, the green signal, and the blue signal of one of the first image signals change to a converted red signal, a converted green signal, and a converted blue signal of one of the converted first image signals according to the following equation:
[
RCt
GCt
BCt
]
=
X
255
⁡
[
Γ
-
1
]
⁡
[
RC
GC
BC
]
where RC, GC and BC refer to the red signal, the green signal, and the blue signal, respectively, of one of the first image signals, RCt, GCt and BCt refer to the converted red signal, the converted green signal, and the converted blue signal, respectively, of one of the converted first image signals, X refers to a gray-compensating value, and Γ−1 refers to an inverse matrix of a daltonization matrix.

### Claim 3 (depends on 1)

The display device of claim 1, wherein the image signals further comprise second image signals corresponding to a second area not overlapping with the first area in the display panel, wherein the timing controller further comprises a second converter configured to receive the second image signals, to perform size conversion on the second image signals to generate converted second image signals, and to output the converted second image signals.

### Claim 4 (depends on 3)

The display device of claim 3, wherein the red signal, the green signal, and the blue signal of one of the second image signals change to a converted red signal, a converted green signal, and a converted blue signal of one of the converted second image signals according to the following equation:
[
RNt
GNt
BNt
]
=
X
255
⁡
[
RN
GN
BN
]
where RN, GN and BN refer to the red signal, the green signal, and the blue signal, respectively, of one of the second image signals, RNt, GNt and BNt refer to the converted red signal, the converted green signal, and the converted blue signal, respectively, of one of the converted second image signals, and X refers to a gray-compensating value.

### Claim 5 (depends on 1)

The display device of claim 1, wherein the signal receiver is further configured to receive the selection signals, and each of the selection signals corresponds to a respective one of the pixels.

### Claim 6 (depends on 5)

The display device of claim 5,
wherein the image signals further comprise second image signals corresponding to a second area not overlapping with the first area in the display panel,
wherein the timing controller further comprises a second converter configured to receive second image signals and to output converted second image signals, and
wherein the selection signals corresponding to the second area have a second logic value.

### Claim 7 (depends on 1)

The display device of claim 1, wherein the selection signals corresponding to ones of the pixels having first direction coordinates between the first direction start coordinate and the first direction end coordinate and having second direction coordinates between the second direction start coordinate and the second direction end coordinate have the first logic value, and the selection signals corresponding to other ones of the pixels having first direction coordinates beyond a range of the first direction start coordinate to the first direction end coordinate or having second direction coordinates beyond a range of second direction start coordinate to the second direction end coordinate have a second logic value.

### Claim 8 (depends on 7)

The display device of claim 7, wherein the signal receiver is configured to receive the selection signals, to output only ones of the image signals corresponding to the selection signals with the first logic value to the first converter, and not to output other ones of the image signals corresponding to the selection signals with the second logic value.

### Claim 9

A driving method of a display device, the driving method comprising:
receiving an image signal comprising a red signal, a green signal, and a blue signal and corresponding to a pixel;
receiving a selection signal;
performing color weakness-compensating conversion on the image signal; and
generating the selection signal,
wherein the color weakness-compensating conversion is performed only when the selection signal has a first logic value,
wherein selection signals corresponding to a first area of a display panel defined by coordinate information received from outside have the first logic value,
wherein the generating of the selection signal comprises:
receiving information about a first direction start coordinate, a first direction end coordinate, a second direction start coordinate, and a second direction end coordinate, and
wherein each one of the first and second start coordinates and the first and second end coordinates corresponds to a respective one of the pixels.

### Claim 10 (depends on 9)

The driving method of claim 9, wherein the performing color weakness-compensating conversion comprises converting the image signal according to the following equation:
[
Ro
Go
Bo
]
=
X
255
⁡
[
Γ
-
1
]
⁡
[
Ri
Gi
Bi
]
where Ri, Gi and Bi refer to the red signal, the green signal, and the blue signal, respectively, Ro, Go, and Bo refer to a converted red signal, a converted green signal, and a converted blue signal, respectively, after the color weakness-compensating conversion, X refers to a gray-compensating value, and Γ−1 refers to an inverse matrix of a daltonization matrix.

### Claim 11 (depends on 9)

The driving method of claim 9, further comprising converting a size of the image signal,
wherein the converting of the size of the image signal is performed only when the selection signal has a second logic value different with the first logic value.

### Claim 12 (depends on 11)

The driving method of claim 11, wherein the converting of the size of the image signal generates a size-converted image signal according to the following equation:
[
Ro
Go
Bo
]
=
X
255
⁡
[
Ri
Gi
Bi
]
where Ri, Gi and Bi refer to the red signal, the green signal, and the blue signal, respectively, Ro, Go and Bo refer to a size-converted red signal, a size-converted green signal, and a size-converted blue signal, respectively, and X refers to a gray-compensating value.

### Claim 13 (depends on 9)

The driving method of claim 9,
wherein the generating of the selection signal is performed prior to the receiving of the selection signal.

### Claim 14 (depends on 13)

The driving method of claim 13, wherein the generating of the selection signal further comprises:
extracting a first coordinate and a second coordinate of the pixel corresponding to the image signal; and
generating the selection signal with the first logic value,
wherein the generating of the selection signal with the first logic value is performed only when the first coordinate of the pixel corresponding to the image signal is between the first direction start coordinate and the first direction end coordinate and the second coordinate of the pixel corresponding to the image signal is between the second direction start coordinate and the second direction end coordinate.