Display device

• US 9,501,988 B2
• Filed: 07/02/2014
• Issued: 11/22/2016
• 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): Eisen, Alexander
• Assistant Examiner(s): Yang, Nan-Ying
• Application Number:
  US14/322,329
• Publication Number:
  US 20140320467A1
• Time in Patent Office: 874 Days
• US Class Current: 1/1
• 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 includes: 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:

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 them, each of the drive electrodes being supplied with a drive signal; and

a plurality of pixel electrodes arranged in a matrix in the first and second directions to face the drive electrodes, each of the pixel electrodes being supplied with a respective image signal,

wherein,

each of the drive electrodes is disposed so that the inter-electrode slit extends to pass over a center region of each of the pixel electrodes aligned in the first direction among the pixel electrodes arranged in the matrix in the first and second directions,

when a scan signal is applied to a first pixel line located in a region corresponding to the inter-electrode slit, the drive signal is applied to both of a couple of drive electrodes which are adjacent to each other with the inter-electrode slit in between, and

when the scan signal is applied to a second pixel line located in a region other than a region corresponding to the inter-electrode slit, the drive signal is applied to a single drive electrode corresponding to the second pixel line.

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

each of the drive electrodes has a width in the second direction corresponding to a size in the second direction of the two or more pixel electrodes, and has one or more inner-electrode slits extending in the first direction, and

each of the inner-electrode slit and the inter-electrode slit extends to pass over center regions of pixel electrodes which belong to a pixel line in the first direction.

3. The display device according to claim 2, wherein each of the inner-electrode slits is configured to be discontinuous in a region between the pixel electrodes in the first direction.

4. The display device according to claim 2, wherein an inner-electrode slit is provided, at the center of each of the pixel electrodes and extends in the second direction.

5. The display device according to claim 2, wherein the inter-electrode slit is provided at the center of each of the pixel electrodes and extends in the second direction.

6. The display device according to claim 2, wherein a pixel electrode is formed with one or more slits extending in a third direction different from any of the first and second directions.

7. The display device according to claim 1, wherein each of the drive electrodes has a width in the second direction corresponding to a size in the second direction of each of the pixel electrodes, and the inner-electrode slit extends to pass over a center region of each of the pixel electrodes which belong to a pixel line in the first direction.

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

a pixel substrate having the pixel electrodes, an image signal wiring, and a drive signal wiring, the image signal wiring supplying the pixel electrodes with the drive signal;

an opposed substrate disposed to face the pixel substrate and having the drive electrodes; and

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

10. A display device, comprising:

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, each of the drive electrodes being supplied with a drive signal; and

a plurality of pixel electrodes arranged in a matrix in the first and second directions to face the drive electrodes, each of the pixel electrodes being supplied with an image signal,

wherein

each of drive electrode has a width in the second direction larger than a width of each of pixel electrodes,

each of the drive electrode is disposed so that the inter-electrode slit extends to pass over a center region of each of the pixel electrodes aligned in the first direction among the pixel electrodes arranged in the matrix in the first and second directions,

each of the drive electrodes has a width in the second direction corresponding to a size in the second direction of the two or more pixel electrodes, and has one or more inner-electrode slits extending in the first direction,

each of the inner-electrode slit and the inter-electrode slit extends to pass over center regions of pixel electrodes which belong to a pixel line in the first direction, device according to claim 2, wherein

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

one or both of a first spacing and a second spacing have dimensions of about 500 micrometers or less, the first spacing representing a distance in the second direction between the adjacent inner-electrode slits, and the second spacing representing a distance in the second direction between the inner-electrode slit and the inter-electrode slit that are adjacent to each other.

11. The display device according to claim 10, wherein one or both of the first spacing and the second spacing have dimensions of about 300 micrometers or less.

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

13. The display device according to claim 1, wherein when a scan signal is applied to a pixel line located in a region corresponding to the inter-electrode slit, the drive signal is applied to both of a couple of drive electrodes which are adjacent to that inter-electrode slit.

14. The display device according to claim 9, wherein the contact portion is a contact conductive pillar.

15. The display device according to claim 9, wherein the contact portion is an anisotropic conductive film.

16. The display device according to claim 1, wherein each of the drive electrodes has a width in the second direction larger than a width of each of the pixel electrodes.

8. A display device, comprising:

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, each of the drive electrodes being supplied with a drive signal; and

a plurality of pixel electrodes arranged in a matrix in the first and second directions to face the drive electrodes, each of the pixel electrodes being supplied with an image signal,

wherein,

each of drive electrode is disposed so that the inter-electrode slit extends to pass over a center region of each of the pixel electrodes aligned in the first direction among the pixel electrodes arranged in the matrix in the first and second directions, and

when a scan signal is applied to a pixel line located in a region corresponding to the inter-electrode slit, the drive signal is applied to both of a couple of drive electrodes which are adjacent to that inter-electrode slit.