Pixel structure, array substrate and display device

Patent metadata

Field	Value
Publication number	US-2016336351-A1
Application number	US-201514908236-A
Country	US
Kind code	A1
Filing date	Apr 24, 2015
Priority date	Jan 8, 2015
Publication date	Nov 17, 2016
Grant date	—

Abstract

A pixel structure, an array substrate and a display device. The pixel substrate comprises a first pixel electrode and a second pixel electrode arranged in a first direction, and a thin film transistor (TFT) disposed between the first pixel electrode and the second pixel electrode. The TFT includes a comb-shaped source, a comb-shaped first drain and a comb-shaped second drain; and a channel region of the TFT is defined by the comb-shaped source respectively and the comb-shaped first drain and the comb-shaped second drain. The channel region has a greater ratio of width to length, thus improving the driving capability of the TFT for driving the first pixel electrode and the second pixel electrode.

First claim

1 : A pixel structure, comprising a first pixel electrode and a second pixel electrode arranged along a first direction, and a thin film transistor (TFT) disposed between the first pixel electrode and the second pixel electrode;
the TFT including a source, a first drain and a second drain; the source including a comb-shaped first source and a comb-shaped second source arranged along a second direction different from the first direction and interconnected; the first drain and the second drain are comb-shaped, and comb teeth of the first drain and comb teeth of the first source are interdigitally disposed, and comb teeth of the second drain and comb teeth of the second source are interdigitally disposed.

2 : The pixel structure of claim 1 , wherein, the comb teeth of the first source extend to the first pixel electrode, and the comb teeth of the second source extend to the second pixel electrode; the comb teeth of the first drain are connected to the first pixel electrode and extend to the second pixel electrode, and the comb teeth of the second drain are connected to the second pixel electrode and extend to the first pixel electrode.

3 : The pixel structure of claim 1 , wherein, the first source and the second source are connected by a common comb tooth.

4 : The pixel structure of claim 1 , wherein, a comb handle connecting the comb teeth of the first source and a comb handle connecting the comb teeth of the second source are band-shaped electrodes respectively extending along the second direction, and the comb handle of the first source is close to the second pixel electrode, and the comb handle of the second source is close to the first pixel electrode.

5 : The pixel structure of claim 1 , wherein, the comb handle of the first source and the comb handle of the second source are parallel.

6 : The pixel structure of claim 1 , wherein, the comb teeth of the first source and the comb teeth of the first drain are parallel to each other, and the comb teeth of the second source and the comb teeth of the second drain are parallel to each other.

7 : The pixel structure of claim 6 , wherein, distances between each of the comb teeth of the first source and two adjacent comb teeth of the first drain are equal, and distances between each of the comb teeth of the second source and two adjacent comb teeth of the second drain are equal.

8 : The pixel structure of claim 1 , wherein, the gate of the TFT is disposed above or below a layer where the source, the first drain and the second drain are located.

9 : The pixel structure of claim 1 , wherein, a width of the gate in the first direction is greater than the length of the comb teeth of the first source and the comb teeth of the second source in the first direction.

10 : The pixel structure of claim 1 , wherein, a width of an active layer in the first direction is less than or equal to a width of the gate in the first direction.

11 : The pixel structure of claim 1 , wherein, the comb teeth of the first source and the comb handle of the first source are perpendicular to each other, and the comb teeth of the second source and the comb handle of the second source are perpendicular to each other, and the comb teeth of the first drain and the comb handle of the first drain are perpendicular to each other, and the comb teeth of the second drain and the comb handle of the second drain are perpendicular to each other.

12 : An array substrate, comprising an array of pixel units formed on a substrate, wherein, each of the pixel units comprises the pixel structure of claim 1 .

13 : The array substrate of claim 12 , wherein, a gate line is disposed between the first pixel electrode and the second pixel electrode of the pixel unit belonging to a same row, the gate line is connected to the gate of the pixel unit in the row, and the comb handle of the first source and the comb handle of the second source of the pixel unit in the row are parallel to the gate line, and the comb teeth of the first source, the second source, the first drain and the second drain are perpendicular to the gate line.

14 : A display device, comprising the array substrate of claim 12 .

15 : The pixel structure of claim 2 , wherein, the first source and the second source are connected by a common comb tooth.

16 : The pixel structure of claim 15 , wherein, a comb handle connecting the comb teeth of the first source and a comb handle connecting the comb teeth of the second source are band-shaped electrodes respectively extending along the second direction, and the comb handle of the first source is close to the second pixel electrode, and the comb handle of the second source is close to the first pixel electrode.

17 : The pixel structure of claim 15 , wherein, the comb handle of the first source and the comb handle of the second source are parallel.

18 : The pixel structure of claim 15 , wherein, the comb teeth of the first source and the comb teeth of the first drain are parallel to each other, and the comb teeth of the second source and the comb teeth of the second drain are parallel to each other.

19 : The pixel structure of claim 15 , wherein, distances between each of the comb teeth of the first source and two adjacent comb teeth of the first drain are equal, and distances between each of the comb teeth of the second source and two adjacent comb teeth of the second drain are equal.

20 : The pixel structure of claim 15 , wherein, the gate of the TFT is disposed above or below a layer where the source, the first drain and the second drain are located.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Li Pan
• Li Wenbo
• Qiao Yong
• Cheng Hongfei
• Xian Jianbo

Classifications

• H10D30/6757

  characterised by the structure of the channel, e.g. transverse or longitudinal shape or doping profile (TFTs having channel structures for preventing kink or snapback effects H10D30/6708; TFTs having lightly-doped source or drain extensions H10D30/6715) · CPC title

• H10D86/441

  Interconnections, e.g. scanning lines · CPC title

• H10D86/00

  Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates · CPC title

• H10D30/6729

  characterised by the electrodes · CPC title

• H10D86/421

  having a particular composition, shape or crystalline structure of the active layer · CPC title