Touch panel

• US 10,191,587 B2
• Filed: 04/13/2018
• Issued: 01/29/2019
• Est. Priority Date: 07/31/2008
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Japan Display Incorporated, Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Inventors: Teramoto, Masahiro
• Primary Examiner(s): Davis, Tony
• Application Number:
  US15/952,919
• Publication Number:
  US 20180232098A1
• Time in Patent Office: 291 Days
• Field of Search: 345170-176
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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
• CPC Class Codes: H01H 1/58 Electric connections to or between contacts; Terminals for high tension switches H01H33/025; for electromagnetic relays H01H50/14; for circuit breakers H01H71/08

Abstract

A touch panel includes a plurality of first electrodes, a plurality of second electrodes, and a plurality of wirings. Each of the plurality of first electrodes has a first portion formed on a layer different from that on which the second electrodes are formed and intersecting the second electrodes, and a second portion formed on the same layer as that on which the second electrodes are formed, but separated from the second electrode. The second electrode and the second portion of the first electrode are formed on a layer different than the layer where the wiring is formed. The first portion of the first electrode is connected to the second portion through a contact portion formed in an insulating film made of a negative resist between the first portion and the second electrode.

Claims

1. A touch panel, comprising:

a substrate;

a plurality of first electrodes on the substrate, extending in a first direction;

a plurality of second electrodes on the substrate extending in a second direction so as to three-dimensionally intersect the respective plurality of first electrodes at a plurality of intersecting portions; and

a plurality of first wirings and second wirings provided in a peripheral area of the substrate,

wherein

each of the plurality of first wirings is electrically connected to a corresponding one of the first electrodes with a first connection portion,

each of the plurality of second wirings is electrically connected to a corresponding one of the second electrodes with a second connection portion,

the first connection portion has a first length in the second direction,

the second connection portion has a second length in the first direction,

each of the intersecting portions of the first electrodes has a first width in the second direction which is shorter than the first length,

each of the intersecting portions of the second electrodes has a second width in the first direction which is shorter than the second length,

each of the plurality of second wirings has a terminal portion which is connected to the second connection portion continuously, and

the terminal portion of the longest wiring of the plurality of the second wirings extends in the second direction and has a third width in the first direction which is shorter than the second length.

2. The touch panel according to claim 1, wherein

the terminal portion of the shortest wiring of the plurality of the second wirings extends in the first direction.

3. The touch panel according to claim 1, wherein

the plurality of first and second wirings are made of a metal material.

4. The touch panel according to claim 1, wherein

the plurality of second electrodes are formed of electrically conductive transparent materials.

5. The touch panel according to claim 1, wherein

the second length is smaller than the largest width of each of the plurality of second electrodes in the first direction.

6. A touch panel, comprising:

a substrate;

a plurality of first electrodes on the substrate, extending in a first direction;

a plurality of second electrodes on the substrate extending in a second direction so as to three-dimensionally intersect the respective plurality of first electrodes at a plurality of intersecting portions;

a plurality of first wirings electrically connected to respective electrodes of the plurality of first electrodes in a peripheral area of the substrate with a plurality of first connection portions; and

a plurality of second wirings electrically connected to respective electrodes of the plurality of second electrodes in the peripheral area of the substrate with a plurality of second connection portions, wherein

each of the plurality of first connection portions has a first length in the second direction,

each of the plurality of second connection portions has a second length in the first direction,

each of the plurality of intersecting portions of the first electrodes has a first width in the second direction,

each of the plurality of intersecting portions of the second electrodes has a second width in the first direction,

the first length is greater than the first width,

the second length is greater than the second width,

each of the plurality of second wirings has a terminal portion which is connected to the second connection portion continuously, and

the terminal portion of the longest wiring of the plurality of the second wirings extends in the second direction and has a third width in the first direction which is shorter than the second length.

7. The touch panel according to claim 6, wherein

the terminal portion of the shortest wiring of the plurality of the second wirings extends in the first direction.

8. The touch panel according to claim 6, wherein

the plurality of first and second wirings are made of a metal material.

9. The touch panel according to claim 6, wherein

the plurality of second electrodes are formed of electrically conductive transparent materials.

10. The touch panel according to claim 6, wherein

the second length is smaller than the largest width of each of the plurality of second electrodes in the first direction.