# US 9,041,002 B2 · TFT-LCD array substrate and display device each with data line on common electrode line having larger dimension than the data line

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- Number: US 9,041,002 B2
- Document ID: US9041002B2
- Status: Granted
- Kind: B2
- Application number: 14/233,751
- Filed: 2013-07-18
- Published: 2015-01-15
- Granted: 2015-05-26
- Earliest claimed: 2013-07-11
- Assignees: Shenzhen China Star Optoelectronics Technology Co., Ltd.
- Applicants: Shenzhen China Star Optoelectronics Technology Co., Ltd.
- Inventors: Qibiao Lv
- Web page: https://patentgrep.com/patent/US9041002B2

## CPC

- G02F 1/134309: {characterised by their geometrical arrangement}
- G02F 1/133345: {Insulating layers (G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence)}
- G02F 1/133514: {Colour filters}
- G02F 1/136286: {Wiring, e.g. gate line, drain line}
- G02F 1/1368: in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)}
- H10D 86/431: {having different compositions, shapes, layouts or thicknesses of gate insulators in different TFTs}
- H10D 86/441: {Interconnections, e.g. scanning lines}
- H10D 86/60: wherein the TFTs are in active matrices
- G02F 1/136222: {Colour filters incorporated in the active matrix substrate}
- 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
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES

## Abstract

A TFT-LCD array substrate is disclosed. The TFT-LCD array substrate includes a substrate and a thin film transistor (TFT) on the substrate, at least one pixel electrode, and a passivation layer. The passivation layer covers the gate insulation layer. The pixel electrode is arranged on the passivation layer. At least one portion between the gate insulation layer and the substrate is arranged with common electrode lines. At least one data line is arranged between the gate insulation layer and the passivation layer. The data line is arranged on the common electrode line. The common electrode line blocks the data line. In addition, a corresponding liquid crystal device is also disclosed. With the TFT-LCD array substrate and the liquid crystal device, not only the light leakage is avoided, but also the crosstalk resulting from the light leakage is also avoided.

## Claims

### Claim 1

A TFT-LCD array substrate, comprising:
a substrate and a thin film transistor (TFT) on the substrate, at least one pixel electrode, and a passivation layer;
the TFT comprises at least a gate insulation layer covered by the passivation layer, and the pixel electrode being arranged on the passivation layer;
at least one portion between the gate insulation layer and the substrate being arranged with at least one common electrode line, at least one data line being arranged between the gate insulation layer and the passivation layer, the data line being arranged on the common electrode line, and a corresponding dimension of the common electrode line is larger than the corresponding dimension of the data line, and the common electrode line blocks the data line;
the gate insulation layer is of a double-layer structure, and a color filter layer is arranged between the double-layer structure of the gate insulation layer; and
wherein the color filter layer is of a single-layer structure, and the color filter layer is a red (R) color filter layer, a green (G) color filter layer, or blue (B) color filter layer.

### Claim 2 (depends on 1)

The TFT-LCD array substrate as claimed in claim 1, wherein an amorphous silicon layer is arranged between the gate insulation layer and the data line.

### Claim 3

A TFT-LCD array substrate, comprising:
a substrate and a thin film transistor (TFT) on the substrate, at least one pixel electrode, and a passivation layer;
the TFT comprises at least a gate insulation layer covered by the passivation layer, and the pixel electrode being arranged on the passivation layer;
at least one portion between the gate insulation layer and the substrate being arranged with at least one common electrode line, at least one data line being arranged between the gate insulation layer and the passivation layer, the data line being arranged on the common electrode line, and a corresponding dimension of the common electrode line is larger than the corresponding dimension of the data line and the common electrode line blocks the data line;
the gate insulation layer is of a double-layer structure, and a color filter layer is arranged between the double-layer structure of the gate insulation layer; and
wherein the color filter layer is an integrated color filter layer comprising any two of the red (R) color filter layer, a green (G) color filter layer, and blue (B) color filter layer.

### Claim 4 (depends on 3)

The TFT-LCD array substrate as claimed in claim 3, wherein the TFT further comprises a gate between the substrate and the gate insulation layer, and an active layer, a source and a gate between the gate insulation layer and the passivation layer.

### Claim 5 (depends on 4)

The TFT-LCD array substrate as claimed in claim 4, wherein the data line electrically connects to the source.

### Claim 6

A display device comprises a TFT-LCD array substrate, the TFT-LCD array substrate comprising:
the TFT comprises at least a gate insulation layer covered by the passivation layer, the pixel electrode being arranged on the passivation layer;
at least one portion between the gate insulation layer and the substrate being arranged with common electrode lines, at least one data line being arranged between the gate insulation layer and the passivation layer, the data line being arranged on the common electrode line, and a corresponding dimension of the common electrode line is larger than the corresponding dimension of the data line, and the common electrode line blocks the data line;
the gate insulation layer is of a double-layer structure, and a color filter layer is arranged between the double-layer structure of the gate insulation layer; and
wherein the color filter layer is of a single-layer structure, and the color filter layer is a red (R) color filter layer, a green (G) color filter layer, or blue (B) color filter layer.

### Claim 7 (depends on 6)

The display device as claimed in claim 6, wherein an amorphous silicon layer is arranged between the gate insulation layer and the data line.

### Claim 8

A display device, comprises a TFT-LCD array substrate, the TFT-LCD array substrate comprising:
the TFT comprises at least a gate insulation layer covered by the passivation layer, the pixel electrode being arranged on the passivation layer;
at least one portion between the gate insulation layer and the substrate being arranged with common electrode lines, at least one data line being arranged between the gate insulation layer and the passivation layer the data line being arranged on the common electrode line, and a corresponding dimension of the common electrode line is larger than the corresponding dimension of the data line, and the common electrode line blocks the data line;
the gate insulation layer is of a double-layer structure, and a color filter layer is arranged between the double-layer structure of the gate insulation layer; and
wherein the color filter layer is an integrated color filter layer comprising any two of the red (R) color filter layer, a green (G) color filter layer, and blue (B) color filter layer.