Display device

• US 10,466,522 B2
• Filed: 03/26/2018
• Issued: 11/05/2019
• Est. Priority Date: 04/17/2014
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Okita, Mitsutaka
• Primary Examiner(s): Dudek, James A
• Application Number:
  US15/935,116
• Publication Number:
  US 20180210257A1
• Time in Patent Office: 589 Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52

Abstract

If a divided area of common electrode layers is positioned on a source line, a leakage electric field on the source line has an effect on a liquid crystal layer through the divided area of the common electrode layers. A display device includes an array substrate and a counter substrate. The array substrate includes scanning signal wiring layers, video signal wiring layers, pixel electrode layers arranged in a layer higher than the video signal wiring layers, and common electrode layers arranged in a layer higher than the pixel electrode layers. The common electrode layers are arranged in positions covering the video signal wiring layers in a plan view. The common electrode layers are divided in the extending direction of the video signal line.

Claims

1. A display device comprising:

an array substrate,

a counter substrate, and

a liquid crystal layer arranged between the array substrate and the counter substrate,

wherein the array substrate includes

a scanning signal wiring extending in a first direction,

a video signal wiring extending in a second direction which is different from the first direction,

an auxiliary wiring extending in the second direction,

a first insulating layer,

a common electrode,

a pixel electrode, and

a contact wiring isolated from the pixel electrode and formed in the same layer as the pixel electrode,

wherein the auxiliary wiring is arranged in positions covering the video signal wiring in a display region in a plan view,

the first insulating layer is arranged between the auxiliary wiring and the common electrode,

the common electrode is divided in the second direction right above the video signal wiring, and

the common electrode is connected to the auxiliary wiring through the contact wiring.

2. The display device according to claim 1, further comprising:

a second insulating layer arranged between the pixel electrode and the common electrode,

a first contact hole formed through the first insulating layer and the second insulating layer on the common electrode, and

a second contact hole formed through the second insulating layer on the auxiliary wiring,

wherein contact wiring is arranged to connect the common electrode inside the first contact hole and the auxiliary wiring inside the second contact hole.

3. The display device according to claim 1,

wherein the counter substrate includes the color filters and a light shielding layer, and

the light shielding layer is arranged in a position covering the auxiliary wiring in a plan view.

4. The display device according to claim 1,

wherein the auxiliary wiring is arranged between sub pixels of different colors in a plan view.

5. The display device according to claim 1,

wherein the common electrode and the pixel electrode is formed with transparent conductive films, and

the auxiliary wiring is formed with a light shielding conductive film.

6. The display device according to claim 1,

wherein the counter substrate includes detection electrode wiring extending in the first direction, and

the common electrode serve also as a driving electrode wiring for an in-cell touch panel.

7. A display device comprising:

a first substrate,

a second substrate, and

a second wiring isolated from the pixel electrode and in the same layer as the pixel electrode,

wherein the first substrate includes

a first signal wiring extending in a first direction,

a second signal wiring extending in a second direction different from the first direction,

a first wiring extending in the second direction,

a first insulating layer,

a common electrode, and

a pixel electrode,

wherein the first wiring is arranged in positions covering the second signal wiring in a display region in a plan view,

the first insulating layer is arranged between the first wiring and the common electrode, and

the common electrode is divided in the second direction right above the second signal wiring,

the common electrode is connected to the first wiring through the second wiring.

8. The display device according to claim 7, further comprising:

a second insulating layer arranged between the pixel electrode and the common electrode,

a first contact hole formed through the first insulating layer and second insulating layer on the common electrode; and

a second contact hole formed through the second insulating layer on the first wiring,

wherein the second wiring is arranged to connect the common electrode inside the first contact hole and the first wiring inside the second contact hole.

9. The display device according to claim 7,

wherein the second substrate includes a light shielding layer and color layers, and

the light shielding layer is arranged in a position covering the at least one of the first wiring in a plan view.

10. The display device according to claim 7,

wherein the first wiring layer is arranged between sub pixels of different colors in a plan view.

11. The display device according to claim 7,

wherein the common electrode and the pixel electrode are transparent conductive films, and

the first wiring is a light shielding conductive film.

12. The display device according to claim 7,

wherein the second substrate includes detection electrode wiring extending in the first direction, and

the common electrode serves also as the driving electrode wiring for an in-cell touch panel.

13. The display device according to claim 7,

wherein the first signal wiring layer is wiring for a scanning signal, and

the second signal wiring layer is wiring for a video signal.

14. The display device according to claim 7, further comprising:

a liquid crystal layer arranged between the first substrate and the second substrate.