Input device and display device

Patent metadata

Field	Value
Publication number	US-9417748-B2
Application number	US-201414520919-A
Country	US
Kind code	B2
Filing date	Oct 22, 2014
Priority date	Oct 22, 2013
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

Abstract

An input device which is a capacitive coupling type and can reduce visibility of wiring patterns of electrodes and interference fringes is provided. The input device is included in a display device including a plurality of pixels, and is configured to detect a contact position of a user. The input device includes a plurality of first electrodes, a plurality of second electrodes disposed so as to cross the first electrodes, and a plurality of third electrodes disposed between the second electrodes. Slits extending obliquely with respect to an extension direction of the second electrodes are formed between the third electrodes.

First claim

What is claimed is:

1. An input device which is included in a display device including a plurality of pixels, and is configured to detect a contact position of a user, the input device comprising:
a plurality of first electrodes;
a plurality of second electrodes disposed so as to cross the first electrodes; and
a plurality of third electrodes disposed between the second electrodes,
wherein slits extending obliquely with respect to an extension direction of the second electrodes are formed between the third electrodes, and
the slits are formed to extend in two directions substantially line-symmetric with respect to the extension direction of the second electrodes.

2. The input device according to claim 1 , wherein each of the third electrodes has a rhombic shape.

3. The input device according to claim 1 , wherein each of the third electrodes has a parallelogrammatic shape.

4. The input device according to claim 1 , wherein the slits are formed at an angle ranging from 13.6 degrees to 64.1 degrees inclusive with respect to the extension direction of the second electrodes.

5. The input device according to claim 1 , wherein sides of the second electrodes have zigzag shapes in accordance with shapes and arrangement positions of the third electrodes.

6. The input device according to claim 1 , wherein each of the second electrodes electrically working as one electrode is formed of a plurality of electrodes.

7. The input device according to claim 6 , wherein a slit formed between the plurality of the electrodes forming each of the second electrodes has a zigzag shape in accordance with zigzag-shaped slits formed between the second electrodes and the third electrodes.

8. The input device according to claim 6 , wherein each of the plurality of the electrodes forming each of the second electrodes is formed to have an electrode width substantially equivalent to each width of the third electrodes.

9. The input device according to claim 6 , comprising a connection part electrically connecting the plurality of the electrodes, forming each of the second electrodes, to each other.

10. The input device according to claim 1 , wherein, assuming an imaginary line extended in an extension direction of any one of a plurality of successive slits included in the slits formed between the third electrodes and extending in the same direction, the third electrodes are formed such that the others of the plurality of the successive slits are disposed at positions deviated in parallel to the imaginary line.

11. The input device according to claim 1 , wherein the second electrodes and the third electrodes are made of substantially the same material and disposed substantially on the same layer.

12. The input device according to claim 11 , wherein the second electrodes and the third electrodes are disposed substantially on the same layer of a color filter substrate.

13. The input device according to claim 1 , wherein the third electrodes are floating electrodes.

14. A display device comprising:
a display unit including a plurality of pixels; and
an input device configured to detect a contact position of a user on the display unit,
wherein the input device includes:
a plurality of first electrodes;
a plurality of second electrodes disposed so as to cross the first electrodes; and
a plurality of third electrodes disposed between the second electrodes, and

wherein slits extending obliquely with respect to an extension direction of the second electrodes are formed between the third electrodes, and
the slits are formed to extend in two directions substantially line-symmetric with respect to the extension direction of the second electrodes.

15. The display device according to claim 14 , wherein the third electrodes are floating electrodes.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Tokai Akira
• Kado Hiroyuki
• Kasahara Shigeo
• Kosugi Naoki
• Aoyama Toshiyuki
• Inoue Shuji
• Takagi Kazushige
• Inoue Manabu
• Nakayama Takahito

Classifications

• G06F3/044 Primary

  by capacitive means · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G09G3/3406

  Control of illumination source (illumination devices structurally associated with liquid crystal cells G02F1/1336) · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title