Display device and display substrate

Patent metadata

Field	Value
Publication number	US-10324345-B2
Application number	US-201615270438-A
Country	US
Kind code	B2
Filing date	Sep 20, 2016
Priority date	Mar 14, 2014
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

A display device and a display substrate are provided. The display device includes a first substrate, having a surface; a gate line disposed on the substrate, wherein the gate line substantially extends along a first direction; a first data line and a drain electrode disposed on the substrate, and the data line intersecting with the gate line. In particular, a first opening projects onto the surface to form a first projection pattern, wherein the first projection pattern includes a first portion, and wherein the first portion is disposed between projections of the at least two finger portions onto the surface and outside a projection of the connecting portion onto the surface.

First claim

What is claimed is:

1. A display device, comprising:
a first substrate, having a surface;
a gate line disposed on the first substrate, wherein the gate line substantially extends along a first direction;
a first data line and a drain electrode disposed on the first substrate, wherein the first data line substantially extends along a second direction different from the first direction;
a first passivation layer disposed on the first data line;
a planarization layer disposed on the first passivation layer;
a common electrode disposed on the first data line;
a second passivation layer disposed on the common electrode;
a pixel electrode disposed on the second passivation layer, wherein the common electrode has a first opening, the planarization layer has a second opening, the second passivation layer has a third opening, and the first opening is corresponding to the second opening, wherein in a cross-sectional view, the planarization layer has two first bottom ends, and the second passivation layer has two second bottom ends, a location of a first vertical central line between the two first bottom ends is different from a location of a second vertical central line between the two second bottom ends, and the first vertical central line and the second vertical central line are substantially parallel to a normal direction of the surface; and wherein the pixel electrode is electrically connected to the drain electrode through the second opening and the third opening, and wherein in the cross section view, the first opening has a first width, the second opening has a second width, the third opening has a third width, the first width is the longest length of the first opening, the second width is the longest length of the second opening, the third width is the longest length of the third opening, the first width is greater than the second width, and the first width is greater than the third width;
a second substrate disposed opposite to the first substrate; and
a display medium layer disposed between the first substrate and the second substrate.

2. The display device as claimed in claim 1 , wherein an active layer disposed on the gate electrode, and wherein a projection of the first opening onto the surface and a projection of the active layer onto the surface partially overlap with each other.

3. The display device as claimed in claim 1 , wherein the pixel electrode comprises at least two finger portions, and a connecting portion, and the at least two finger portions connect to each other via the connecting portion.

4. The display device as claimed in claim 3 , wherein the first width is greater than a width of the connecting portion along the second direction.

5. The display device as claimed in claim 3 , wherein the first opening projects onto the surface to form a first projection pattern, wherein the first projection pattern comprises a first portion, and wherein the first portion is disposed between projections of the at least two finger portions onto the surface and outside a projection of the connecting portion onto the surface.

6. The display device as claimed in claim 3 , wherein the first opening projects onto the surface to form a first projection pattern, and the first projection pattern comprises a second portion, wherein the second portion is disposed between a projection of the connecting portion onto the surface and a projection of an edge of the gate line onto the surface, wherein the edge of the gate line is located away from the pixel electrode, and wherein the second portion and a projection of the active layer onto the surface partially overlap with each other.

7. The display device as claimed in claim 3 , wherein the first opening projects onto the surface to form a first projection pattern, and the first projection pattern comprises a third portion, wherein the third portion is disposed between a projection of the connecting portion onto the surface and a projection of the first data line onto the surface.

8. The display device as claimed in claim 3 , further comprising a second data line substantially parallel to the first data line, wherein the first opening projects onto the surface to form a first projection pattern, and the first projection pattern comprises a fourth portion, and wherein the fourth portion is disposed between a projection of the connecting portion onto the surface and a projection of the second data line onto the surface.

9. The display device as claimed in claim 3 , wherein each finger portion of the at least two finger portions has a width between 2.25 μm and 2.75 μm.

10. The display device as claimed in claim 3 , wherein a distance between any two adjacent finger portions of the at least two finger portions is between 2.9 μm and 4.5 μm.

11. The display device as claimed in claim 3 , wherein a sum of a distance between one of the at least two finger portions and the first data line and a width of the first data line is between 7.6 μm and 9.0 μm.

12. The display device as claimed in claim 3 , wherein a distance between the at least two finger portions of the pixel electrode of any two adjacent pixels is between 9.5 μm and 12 μm.

13. The display device as claimed in claim 1 , wherein a thickness of the second passivation layer is between 900 Å and 1700 Å.

14. The display device as claimed in claim 1 , wherein the first width is between 4 μm and 10.5 μm.

15. The display device as claimed in claim 1 , wherein the second width is between 3.7 μm and 7.5 μm.

16. A display substrate, comprising:
a substrate having a surface;
a gate line disposed on the substrate, wherein the gate line substantially extends along a first direction;
a first data line and a drain electrode disposed on the substrate, wherein the first data line substantially extends along a second direction different from the first direction;
a first passivation layer disposed on the first data line;
a planarization layer disposed on the first passivation layer;
a common electrode disposed on the first data line;
a second passivation layer disposed on the common electrode; and
a pixel electrode disposed on the second passivation layer, wherein the common electrode has a first opening, the planarization layer has a second opening, the second passivation layer has a third opening, and the first opening is corresponding to the second opening, wherein in a cross-sectional view, the planarization layer has two first bottom ends, and the second passivation layer has two second bottom ends, a location of a first vertical central line between the two first bottom ends is different from a location of a second vertical central line between the two second bottom ends, and the first vertical central line and the second vertical central line are substantially parallel to a normal direction of the surface;
and wherein the pixel electrode is electrically connected to the drain electrode through the second opening and the third opening, and wherein in the cross section view, the first opening has a first width, the second opening has a second width, the third opening has a third width, the first width is the longest length of the first opening, the second width is the longest length of the second opening, the third width is the longest length of the third opening, the first width is greater than the second width, and the first width is greater than the third width.

17. The display substrate as claimed in claim 16 , wherein an active layer disposed on the gate electrode, wherein a projection of the first opening onto the surface and a projection of the active layer onto the surface partially

Assignees

• Innolux Corp

Inventors

• Chen Hung-Kun
• Lee Yi-Chin
• Chang Hong-Kang
• Kao Yi-Chien
• Chu Jui-Ching
• Sung Li-Wei
• Huang Hui-Min

Classifications

• G02F2201/40

  Arrangements for improving the aperture ratio · CPC title

• G02F1/133345

  Insulating layers (G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence) · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G02F2201/123

  pixel · CPC title

• G09G2300/0465

  Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness · CPC title