# US 7,609,351 B2 · Thin film transistor array panel for liquid crystal display

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- Number: US 7,609,351 B2
- Document ID: US7609351B2
- Status: Granted
- Kind: B2
- Application number: 11/954,121
- Filed: 2007-12-11
- Published: 2008-04-17
- Granted: 2009-10-27
- Earliest claimed: 2002-12-03
- Assignees: Samsung Electronics Co., Ltd.
- Inventors: Chang-Hun Lee; Eun-Hee Han; Hak-Sun Chang
- Web page: https://patentgrep.com/patent/US7609351B2

## CPC

- G02F 1/134363: {for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]}
- G02F 1/136213: {Storage capacitors associated with the pixel electrode}
- G02F 2201/128: field shaping
- G02F 2201/40: Arrangements for improving the aperture ratio
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS

## Abstract

Disclosed is a liquid crystal display capable of high quality image and bright display. Gate signal lines are curved at near switching elements of the liquid crystal display. A pixel area is defined by the gate signal lines and their intersecting data signal lines. Pixel electrodes and common electrodes are disposed along a longitudinal direction of a pixel. A pixel signal and a common signal line is connected to the pixel electrode and the common electrode respectively. A storage capacitor may be formed in the middle of a longitudinal direction of the pixel, or where generally a texture may arise during display. One half of the pixel may be symmetrical with the other half with respect to the storage capacitor. A common signal line may be parallel with the data signal line and be disposed nearer to the data signal line than a pixel signal line. The pixel may be disposed symmetrically with respect to the data signal line therebetween. The pixel shape may also be repeated in the direction of the gate signal line.

## Claims

### Claim 1

A liquid crystal display, comprising:
a substrate;
a first signal line formed on the substrate;
a second signal line intersecting the first signal line;
a first pixel electrode formed in a pixel area defined by intersections of the first signal line and the second signal line and having a bar shape;
a second pixel electrode formed in the pixel area, having a bar shape, and forming an acute angle with respect to the first pixel electrode;
a center pixel electrode formed between the first pixel electrode and the second pixel electrode and having a triangle portion, a first extended portion stretched out from the triangle portion and parallel to the first pixel electrode, and a second extended portion stretched out from the triangle portion and parallel to the second pixel electrode;
a first pixel signal line connecting the first pixel electrode, the second pixel electrode, and the center pixel electrode;
a second pixel signal line connecting the first pixel electrode, the second pixel electrode, and the center pixel electrode;
a switching element connected to the first signal line, the second signal line, and the first pixel signal line; and
a common electrode formed on the substrate and forming an electric field along with the first pixel electrode, the second pixel electrode, and the center pixel electrode.

### Claim 2 (depends on 1)

The liquid crystal display of claim 1, wherein at least the triangle portion of the center pixel electrode overlaps the common electrode.

### Claim 3 (depends on 2)

The liquid crystal display of claim 2, wherein the first extended portion is formed along an imaginary straight line extended from a first side of the triangle portion and the second extended portion is formed along an imaginary straight line extended from a second side of the triangle portion.

### Claim 4 (depends on 3)

The liquid crystal display of claim 3, wherein an apex of the triangle portion is connected to the first pixel signal line and ends of the first and second extended portions are connected to the second pixel signal line.

### Claim 5 (depends on 4)

The liquid crystal display of claim 4, wherein the first pixel signal line is parallel to the second signal line.

### Claim 6 (depends on 5)

The liquid crystal display of claim 5, wherein the triangle portion of the center pixel electrode is disposed on an imaginary straight line that passes transverse center of the pixel area.

### Claim 7 (depends on 1)

The liquid crystal display of claim 1, wherein the first extended portion is formed along an imaginary straight line extended from a first side of the triangle portion and the second extended portion is formed along an imaginary straight line extended from a second side of the triangle portion.

### Claim 8 (depends on 7)

The liquid crystal display of claim 7, wherein an apex of the triangle portion is connected to the first pixel signal line and ends of the first and second extended portions are connected to the second pixel signal line.

### Claim 9 (depends on 8)

The liquid crystal display of claim 8, wherein the first pixel signal line is parallel to the second signal line.

### Claim 10 (depends on 9)

The liquid crystal display of claim 9, wherein the triangle portion of the center pixel electrode is disposed on an imaginary straight line that passes transverse center of the pixel area.

### Claim 11 (depends on 1)

The liquid crystal display of claim 1, wherein an apex of the triangle portion is connected to the first pixel signal line and ends of the first and second extended portions are connected to the second pixel signal line.

### Claim 12 (depends on 11)

The liquid crystal display of claim 11, wherein the first pixel signal line is parallel to the second signal line.

### Claim 13 (depends on 12)

The liquid crystal display of claim 12, wherein the triangle portion of the center pixel electrode is disposed on an imaginary straight line that passes transverse center of the pixel area.