Pixel structure

• US 9,864,245 B2
• Filed: 08/10/2015
• Issued: 01/09/2018
• Est. Priority Date: 01/28/2015
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Tien, Kun-Cheng, Li, Shu-En, Liao, Chien-Huang
• Primary Examiner(s): CHANG, CHARLES S
• Application Number:
  US14/822,882
• Publication Number:
  US 20160218115A1
• Time in Patent Office: 883 Days
• Field of Search: 349144
• CPC Class Codes: G02F 1/133707 Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes
• CPC Class Codes: G02F 1/134345 Subdivided pixels, e.g. for grey scale or redundancy
• CPC Class Codes: G02F 1/13624 having more than one switching element per pixel

Abstract

A pixel structure including a plurality of sub-pixels arranged in array is provided. Each of the sub-pixels includes an active device and a pixel electrode electrically connected to the active device respectively. Each of the pixel electrodes includes a plurality of stripe patterns respectively, and spacings of at least one portion of the stripe patterns of at least one of the sub-pixels are larger than spacings of the stripe patterns of the other sub-pixels.

Claims

1. A pixel structure, comprising a plurality of sub-pixels arranged in array, each of the sub-pixels comprising an active device and a pixel electrode electrically connected to the active device respectively, each of the pixel electrodes comprising a plurality of stripe patterns respectively, and spacings of at least one portion of the stripe patterns of at least one of the sub-pixels being larger than spacings of the stripe patterns of the other sub-pixels,

wherein the sub-pixels comprise:

a first sub-pixel, comprising a first pixel electrode comprising a plurality of first stripe patterns;

a second sub-pixel, comprising a second pixel electrode comprising a plurality of second stripe patterns; and

a third sub-pixel, comprising a third pixel electrode comprising a plurality of third stripe patterns,

wherein the first pixel electrode further comprises a first trunk portion, the second pixel electrode further comprises a second trunk portion, the third pixel electrode further comprises a diamond pattern and a third trunk portion connected to the diamond pattern, wherein the first stripe patterns are connected to and extended outwardly from the first trunk portion, the second stripe patterns are connected to and extended outwardly from the second trunk portion, and the third stripe patterns are connected to the diamond pattern and the third trunk portion and extended outwardly from the third trunk portion.

2. The pixel structure according to claim 1, wherein the sub-pixels comprising:

a first sub-pixel, comprising a first active device and a first pixel electrode electrically connected to the first active device, and the first pixel electrode comprising a plurality of first stripe patterns;

a second sub-pixel, comprising a second active device and a second pixel electrode electrically connected to the second active device, and the second pixel electrode comprising a plurality of second stripe patterns; and

a third sub-pixel, comprising a third active device and a third pixel electrode electrically connected to the third active device, and the third pixel electrode comprising a plurality of third stripe patterns, wherein a width of each of the first stripe patterns, each of the second stripe patterns and each of the third stripe patterns is L, and each of the spacings of the first stripe patterns, the second stripe patterns and a portion of the third stripe patterns is S, each of the spacings of the other portions of the third stripe patterns is S′

, and 1 micron ≦

(S′

-S) ≦

2.5 micron.

3. The pixel structure according to claim 2, wherein the width L is 4 micron, and each of the spacings S is 2 micron, and each of the spacings S′

is between 3 micron and 4.5 micron.

4. The pixel structure according to claim 2, wherein the first pixel electrode further comprises a first trunk portion, the second pixel electrode further comprises a second trunk portion, the third pixel electrode further comprises a third trunk portion, wherein the first stripe patterns are connected to and extended outwardly from the first trunk portion, the second stripe patterns are connected to and extended outwardly from the second trunk portion, and the third stripe patterns are connected to and extended outwardly from the third trunk portion.

5. The pixel structure according to claim 4, wherein within the third stripe patterns, an area occupied by the portion of the third stripe patterns having the spacings S is I, and an area occupied by the portion of the third stripe patterns having the spacings S′

is I′

, and I and I′

satisfy the following condition;

0.33≦

[I′

/(I+I′

)]≦

0.66.

6. The pixel structure according to claim 2, wherein the first sub-pixel is a red sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a blue sub-pixel.

7. The pixel structure according to claim 1, wherein

the first sub-pixel further comprises a first active device and the first pixel electrode is electrically connected to the first active device,

the second sub-pixel further comprises a second active device and the second pixel electrode is electrically connected to the second active device, and

the third sub-pixel further comprises a third active device and the third pixel electrode is electrically connected to the third active device, wherein a width of each of the first stripe patterns, each of the second stripe patterns and each of the third stripe patterns is L, and each of the spacings of the first stripe patterns, the second stripe patterns is S, each of the spacings of the third stripe patterns is S′

, and 1 micron ≦

(S′

-S) ≦

2.5 micron.

8. The pixel structure according to claim 7, wherein the width L is 4 micron, and each of the spacings S is 2 micron, and each of the spacings S′

is between 3 micron and 4.5 micron.

9. The pixel structure according to claim 7, wherein within the third stripe patterns, an area occupied by the diamond pattern is II, and an area occupied by the third stripe patterns having the spacings S′

is II′

, and II and II′

satisfies the following condition;

0. 50≦

[II′

/(II+II′

)]≦

0.90.

10. The pixel structure according to claim 1, wherein the sub-pixels comprising:

a first sub-pixel, comprising a first active device and a first pixel electrode electrically connected to the first active device, and the first pixel electrode comprising a plurality of first stripe patterns;

a second sub-pixel, comprising a second active device and a second pixel electrode electrically connected to the second active device, and the second pixel electrode comprising a plurality of second stripe patterns; and

a third sub-pixel, comprising a third active device and a third pixel electrode electrically connected to the third active device, and the third pixel electrode comprising a plurality of third stripe patterns, wherein a width of each of the first stripe patterns and each of the second stripe patterns is L, and each of the spacings of the first stripe patterns and the second stripe patterns is S, widths of a portion of the third stripe patterns are L, respectively, and widths of the other portions of the third stripe patterns are L′

, respectively, each of the spacings of the portion of the third stripe patterns is S, and each of the spacings of the other portions of the third stripe patterns is S′

, wherein (L′

+S′

)=(L+S), and 1 micron ≦

(S′

-S) ≦

2.5 micron.

11. The pixel structure according to claim 1, wherein

the first sub-pixel further comprises a first active device and the first pixel electrode is electrically connected to the first active device,

the second sub-pixel further comprises a second active device and the second pixel electrode is electrically connected to the second active device, and

the third sub-pixel further comprises a third active device, the third pixel electrode is electrically connected to the third active device, wherein a width of each of the first stripe patterns and each of the second stripe patterns is L, and each of the spacings of the first stripe patterns and the second stripe patterns is S, a width of each of the third stripe patterns is L′

, and each of the spacings of the third stripe patterns is S′

, wherein (L′

+S′

)=(L+S), and 1 micron ≦

(S′

-S) ≦

2.5 micron.