Display substrate and display device

Patent metadata

Field	Value
Publication number	US-10642118-B2
Application number	US-201916401413-A
Country	US
Kind code	B2
Filing date	May 2, 2019
Priority date	Mar 14, 2014
Publication date	May 5, 2020
Grant date	May 5, 2020

Abstract

A display substrate is provided. The display substrate includes a first insulating layer disposed on a substrate, a second insulating layer disposed on the first insulating layer. In particular, the first insulating layer has a first opening and the second insulating layer has a second opening, wherein the first opening and the second opening are partially overlapped. Further, in a cross-sectional view, the first insulating layer corresponding to the first opening has two first bottom ends, and the second insulating layer corresponding to the second opening 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.

First claim

What is claimed is:

1. A display substrate, comprising:
a substrate having a surface;
a gate line disposed on the substrate;
a first insulating layer disposed on the gate line;
a second insulating layer disposed on the first insulating layer; and
an electrode disposed on the first insulating layer, wherein the first insulating layer has a first opening and the second insulating layer has a second opening, wherein the first opening and the second opening are partially overlapped, and at least part of the electrode is in the second opening;
wherein in a cross-sectional view, the first insulating layer corresponding to the first opening has two first bottom ends, and the second insulating layer corresponding to the second opening 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.

2. The display substrate as claimed in claim 1 , wherein the at least part of the electrode is in the first opening.

3. The display device as claimed in claim 1 , further comprising a first conductive loop disposed on the substrate, wherein the substrate has a display region, and wherein the first conductive loop is disposed outside the display region.

4. The display substrate as claimed in claim 3 , further comprising:
a plurality of conductive lines disposed on the substrate;
wherein the first conductive loop crosses the plurality of conductive lines.

5. The display substrate as claimed in claim 4 , further comprising:
a sealant outside the display region, wherein the first conductive loop is disposed between the display region and the sealant, and the sealant partially overlaps the plurality of conductive lines.

6. The display substrate as claimed in claim 5 , further comprising:
a peripheral boundary, wherein a distance between the sealant and the peripheral boundary is zero.

7. The display substrate as claimed in claim 4 , further comprising:
a sealant outside the display region;
a second conductive loop disposed on the substrate and outside the display region, wherein the sealant is disposed on a part of the second conductive loop.

8. The display substrate as claimed in claim 7 , further comprising:
a peripheral boundary, wherein a distance between the second conductive loop and the peripheral boundary is from 50 to 300 μm.

9. The display substrate as claimed in claim 3 , wherein the first conductive loop comprises at least one first conductive block and at least one second conductive block, and wherein the at least one first conductive block electrically connects the at least one second conductive block.

10. The display substrate as claimed in claim 9 , wherein the at least one first conductive block overlaps the at least one second conductive block.

11. The display substrate as claimed in claim 10 , further comprising:
a dielectric layer disposed between the at least one first conductive block and the at least one second conductive blocks, wherein the dielectric layer has at least two via holes, and the at least one second conductive blocks are electrically connected to the at least one first conductive block by the at least two via holes.

12. The display substrate as claimed in claim 1 , further comprising:
a spacer wall surrounding the display region, wherein the spacer wall comprises a corner region and a longitudinal region, and a width of the corner region is different from a width of the longitudinal region.

13. The display substrate as claimed in claim 1 , wherein the electrode is between the first insulating layer and the second insulating layer, and wherein the second insulating layer covers sidewalls of the electrode and sidewalls of the first insulating layer.

14. A display device, comprising:
a first substrate having a surface;
a gate line disposed on the first substrate;
a first insulating layer disposed on the gate line;
a second insulating layer disposed on the first insulating layer;
an electrode disposed on the second insulating layer, wherein the first insulating layer has a first opening, and the second insulating layer has a second opening, wherein the first opening and the second opening are partially overlapped, and at least part of the electrode is in the second opening;
wherein in a cross-sectional view, the first insulating layer corresponding to the first opening has two first bottom ends, and the second insulating layer corresponding to the second opening 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;
an second substrate disposed opposite to the first substrate; and
a display medium layer disposed between the first substrate and the second substrate.

15. The display device as claimed in claim 14 , wherein the at least part of the electrode is in the first opening.

16. The display device as claimed in claim 14 , further comprising a first conductive loop disposed on the first substrate, wherein the first substrate has a display region, and wherein the first conductive loop is disposed outside the display region.

17. The display device as claimed in claim 16 , further comprising:
a plurality of conductive lines disposed on the first substrate, wherein the first conductive loop crosses the plurality of conductive lines.

18. The display device as claimed in claim 16 , wherein the first conductive loop comprises at least one first conductive block and at least one second conductive block, and wherein the at least one first conductive block electrically connects the at least one second conductive block.

19. The display device as claimed in claim 18 , wherein the at least one first conductive block overlaps with the at least one second conductive block.

20. The display device as claimed in claim 19 , further comprising:
a dielectric layer disposed between the at least one first conductive block and the at least one second conductive blocks, wherein the dielectric layer has at least two via holes, and the at least one second conductive blocks are electrically connected to the at least one first conductive block by the at least two via holes.

Assignees

• Innolux Corp

Inventors

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

Classifications

• G02F2201/40

  Arrangements for improving the aperture ratio · CPC title

• G02F1/136286

  Wiring, e.g. gate line, drain line · CPC title

• G02F1/134363

  for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS] · CPC title

• G09G3/20

  for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} · CPC title

• G02F1/13458

  Terminal pads · CPC title