Touch screen, touch panel, and display device equipped therewith

• US 9,442,616 B2
• Filed: 10/01/2014
• Issued: 09/13/2016
• Est. Priority Date: 10/24/2013
• Status: Active Grant

• Current Assignee: Trivale Technologies, LLC (Vector Capital Corporation)
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Imamura, Takuji, Ono, Takeshi, Nakamura, Tatsuya, Orita, Tae, Agari, Masafumi, Nakagawa, Naoki
• Primary Examiner(s): Chang, Kent
• Assistant Examiner(s): OLIVER, GERALD L
• Application Number:
  US14/503,837
• Publication Number:
  US 20150116262A1
• Time in Patent Office: 713 Days
• Field of Search: 345173-178, 178 1801- 2004
• US Class Current: 1/1
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

In an intersecting region of a bundle of wirings in a column direction and a bundle of wirings in a row direction, a column wiring block region arranged with detection column wirings and first floating wirings and a row wiring block region arranged with detection row wirings and second floating wirings are disposed in a staggered manner. The bundle of wirings in the column direction includes a first compensation region arranged with the detection column wirings which connect between the detection column wirings in the column wiring block regions adjacent to each other in a diagonal direction. The bundle of wirings in the row direction includes a second compensation region arranged with the detection row wirings which electrically connect between the detection row wirings in the row wiring block regions adjacent to each other in a diagonal direction.

Claims

1. A touch screen comprising:

a transparent substrate;

a bundle of wirings in a column direction which is formed on said transparent substrate and includes a plurality of detection column wirings electrically connected in common, and a bundle of wirings in a row direction which includes a plurality of detection row wirings electrically connected in common;

first floating wirings which are formed on a same wiring layer as said detection row wirings and are not connected with said detection column wirings and said detection row wirings; and

second floating wirings which are formed on a same wiring layer as said detection column wirings and are not connected with said detection column wirings and said detection row wirings, wherein

in a region where said bundle of wirings in the column direction and said bundle of wirings in the row direction intersect with each other,

a column wiring block region arranged with said detection column wirings configuring said bundle of wirings in the column direction and said first floating wirings and

a row wiring block region arranged with said detection row wirings configuring said bundle of wirings in the row direction and said second floating wirings are disposed in a staggered manner,

said bundle of wirings in the column direction includes

a first compensation region arranged with said detection column wirings, which are disposed so as to electrically connect between said detection column wirings in said column wiring block regions adjacent to each other in a diagonal direction, said first floating wirings, and said second floating wirings, and

said bundle of wirings in the row direction includes

a second compensation region arranged with said detection row wirings, which are disposed so as to electrically connect between said detection row wirings in said row wiring block regions adjacent to each other in a diagonal direction, said second floating wirings, and said first floating wirings.

2. The touch screen according to claim 1, wherein said detection column wirings in said first compensation region are replaced with said second floating wirings except at places where it is necessary to electrically connect between said detection column wirings in said column wiring block regions adjacent to each other in the diagonal direction, and

said detection row wirings in said second compensation region are replaced with said first floating wirings except at places where it is necessary to electrically connect between said detection row wirings in said row wiring block regions adjacent to each other in the diagonal direction.

3. The touch screen according to claim 1, wherein said column wiring block region has a rectangular shape where said detection column wirings are arranged at four corners, and

said row wiring block region has a rectangular shape where said detection row wirings are arranged at four corners.

4. A touch panel comprising:

the touch screen according to claim 1;

a switching circuit which sequentially selects each of the plurality of said detection column wirings and each of the plurality of said detection row wirings; and

a detection processing circuit which, based on detection results of electrostatic capacitance formed between said detection column wiring selected by said switching circuit and a pointing body touching said touch screen and electrostatic capacitance formed between said detection row wiring selected by said switching circuit and said pointing body, calculates a touch position of said pointing body.

5. A display device comprising:

the touch panel according to claim 4; and

a display panel, on which said touch screen of said touch panel is mounted.

6. The display device according to claim 5, wherein said touch screen is adhesively fixed to a front surface side of said display panel.

7. A touch panel comprising:

the touch screen according to claim 1;

a switching circuit which sequentially selects each of the plurality of said detection column wirings and each of the plurality of said detection row wirings; and

a detection processing circuit which, based on detection results of a change of mutual capacitance between said detection column wiring and said detection row wiring selected by said switching circuit according to a touch of a pointing body to said touch screen, calculates a touch position of said pointing body.

8. A display device comprising:

the touch panel according to claim 7; and

a display panel, on which said touch screen of said touch panel is mounted.

9. The display device according to claim 8, wherein said touch screen is adhesively fixed to a front surface side of said display panel.