Display device

• US 10,120,244 B2
• Filed: 10/12/2016
• Issued: 11/06/2018
• Est. Priority Date: 08/24/2010
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Noguchi, Koji, Sakai, Eiji, Ikeda, Masanobu, Ishizaki, Koji
• Primary Examiner(s): Yang, Nan-Ying
• Application Number:
  US15/291,396
• Publication Number:
  US 20170031216A1
• Time in Patent Office: 755 Days
• 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 1/134336 Matrix
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 2320/0214 with crosstalk due to leakage current of pixel switch in active matrix panels
• CPC Class Codes: G09G 3/3674 Details of drivers for scan electrodes
• CPC Class Codes: G09G 3/3677 suitable for active matrices only

Abstract

A display device including: a plurality of drive electrodes extending in a first direction and arranged side-by-side in a second direction with an inter-electrode slit in between; and a plurality of pixel electrodes arranged in matrix in the first and second directions. Each of the drive electrodes has one or more inner-electrode slits, and a center of the pixel electrode is located in the inter-electrode slit or in the inner-electrode slit.

Claims

1. A display device, comprising:

common electrodes including adjacent common electrodes with an inter-electrode slit between the adjacent common electrodes, each common electrode having an inner-electrode slit; and

pixel electrodes including a first plurality of first pixel electrodes, a second plurality of first pixel electrodes, and a plurality of second pixel electrodes between the first plurality of first pixel electrodes and the second plurality of first pixel electrodes,

wherein,

each inner-electrode slit and the inter-electrode slit have a length in a first direction, respectively,

the pixel electrodes are arrayed at least along the first direction,

each of the common electrodes overlies a respective plurality of the first pixel electrodes,

the inner-electrode slit of each common electrode overlies a center region of at least one of the respective plurality of first pixel electrodes, and

the inter-electrode slit overlies a center region of each of the plurality of second pixel electrodes.

2. The display device according to claim 1, wherein, each inner-electrode slit overlies the center region of each of the respective plurality of first pixel electrodes.

3. The display device according to claim 1, wherein:

each of the common electrodes has more than one inner-electrode slit including a first inner-electrode slit and a second inner-electrode slit,

the respective plurality of first pixel electrodes are arrayed in the first direction and a second direction that crosses the first direction, and

the first inner-electrode slit and the second inner electrode slit overlie center regions of different first pixel electrodes of the respective plurality of first pixel electrodes.

4. The display device according to claim 1, wherein each of the inner-electrode slits is discontinuous in a region between two adjacent first pixel electrodes.

5. The display device according to claim 1, wherein each inner-electrode slit has a first portion with a length extending in the first direction and in a second portion with a length extending in a second direction crossing the first direction.

6. The display device according to claim 1, wherein the inter-electrode slit has a first portion with a length extending in the first direction and a second portion with a length extending in a second direction crossing the first direction.

7. The display device according to claim 1, wherein:

each of the inter-electrode slit and the inner-electrode slit extends in the first direction, and

at least one of the pixel electrodes has one or more slits extending in a third direction different from either the first direction or a second direction crossing the first direction.

8. The display device according to claim 1, wherein:

each of the common electrodes has a length in the first direction and a width in a second direction which crosses the first direction, corresponding to a size in the second direction of each of the pixel electrodes, and

each inner-electrode slit overlies the center region of each of the respective plurality of first pixel electrodes arrayed in the first direction.

9. The display device according to claim 1, wherein, when an image signal is applied to a pixel line located in a region corresponding to the inter-electrode slit, a drive signal is applied to both of the adjacent common electrodes.

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

a pixel substrate having the pixel electrodes arranged in an effective display region, image signal wiring, and drive signal wiring, the image signal wiring being coupled to at least one of the pixel electrodes;

an opposed substrate facing the pixel substrate and having the common electrodes; and

a contact portion at a location which is between the pixel substrate and the opposed substrate and outside the effective display region, the contact portion allowing each common electrode to be in conduction with the drive signal wiring.

11. The display device according to claim 1, wherein,

a first spacing, which is a distance between each inner-electrode slit and inter-electrode slit that are adjacent to each other, is about 500 micrometers or less.

12. The display device according to claim 1, wherein:

each of the common electrodes has two or more inner-electrode slits, and

a second spacing, which is a distance between adjacent inner-electrode slits, is about 500 micrometers or less.

13. The display device according to claim 11, wherein the first spacing is about 300 micrometers or less.

14. The display device according to claim 12, wherein the second spacing is about 300 micrometers or less.

15. The display device according to claim 1, further comprising a liquid crystal layer of a vertical alignment mode disposed between the common electrodes and the pixel electrodes.

16. The display device according to claim 1, wherein, when an image signal is applied to one of the second pixel electrodes, a drive signal is applied to both of the adjacent common electrodes.

17. The display device according to claim 10, wherein the contact portion is a contact conductive pillar.

18. The display device according to claim 10, wherein the contact portion is an anisotropic conductive film.

19. The display device according to claim 1, wherein each of the common electrodes has a width in a second direction, which crosses the first direction, that is larger than a width in the second direction of each of the pixel electrodes.

20. A display device, comprising:

a plurality of common electrodes including a first common electrode and a second common electrode adjacent to the first common electrode, each of the first common electrode and the second common electrode having a length extending in a first direction and each having an inner-electrode slit;

an inter-electrode slit between the first common electrode and the second common electrode; and

a plurality of pixel electrodes including a first pixel electrode and a second pixel electrode adjacent to the first pixel electrode in the first direction and a third pixel electrode adjacent to the first pixel electrode in a second direction crossing the first direction,

wherein,

the inner-electrode slit of the first common electrode overlies center regions of the first pixel electrode and the second pixel electrode,

the inter-electrode slit overlies a center region of the third pixel electrode,

the third pixel electrode is overlapped by both the first common electrode and the second common electrode, and

the first pixel electrode and the second pixel electrode are not overlapped by the second common electrode.