Display Device

• US 20130306460A1
• Filed: 07/24/2013
• Published: 11/21/2013
• 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
• Granted Patent: US 9,245,696 B2
• Time in Patent Office: Days
• US Class Current: 200/600
• 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 formed on the substrate, extending in a first direction and being aligned in a second direction intersecting the first direction,

a plurality of second electrodes extending in the second direction so as to three dimensionally intersect the plurality of first electrodes and being aligned in the first direction, and

a plurality of wirings electrically connected to the plurality of first electrodes and the plurality of second electrodes respectively at a peripheral area of the substrate, wherein

each of the plurality of first electrodes has a first portion formed on a layer different from a layer on which the plurality of second electrodes are formed and three-dimensionally intersecting one of the plurality of second electrodes, and a second portion formed on the layer on which the plurality of second electrodes are formed, but separated from the plurality of second electrodes,

the plurality of second electrodes and the second portion are made of different material from that of the wirings,

the first portion is electrically connected to the second portion through a contact portion formed in an insulating film between the first portion and the plurality of second electrodes,

the wiring is electrically connected to the first electrode and second electrode through a connection portion which is provided on the insulating film on an end portion of the first and second electrode respectively, and

the insulating film is made of a negative resist.

2. The touch panel according to claim 1, wherein

the plurality of second electrodes and the second portion are formed using electrically conductive transparent material, and

the wirings and the first portion are formed using electrically conductive metal material having a lower resistance value than a resistance value of the second electrodes and the second portion.

3. The touch panel according to claim 1, wherein

each of the plurality of second electrodes has a portion, located between adjacent two electrodes of the plurality of first electrodes, wider than another portion thereof which three dimensionally intersects the first portion, and

the second portion is formed wider between adjacent two electrodes of the plurality of second electrodes than the first portion.

4. The touch panel according to claim 1, further comprising a protective film formed on the substrate so as to cover the plurality of first electrodes and the plurality of second electrodes.

5. The touch panel according to claim 4, the protective film is negative resist.

6. A touch panel, comprising:

a substrate,

a plurality of first electrodes formed on the substrate, extending in a first direction and being aligned in a second direction intersecting the first direction,

a plurality of second electrodes extending in the second direction so as to three dimensionally intersect the plurality of first electrodes and being aligned in the first direction, and

a plurality of wirings electrically connected to the plurality of first electrodes and the plurality of second electrodes respectively at a peripheral area of the substrate, wherein

each of the plurality of first electrodes has a first portion formed on a layer different from a layer on which the plurality of second electrodes are formed and three-dimensionally intersecting one of the plurality of second electrodes, and a second portion formed on the layer on which the plurality of second electrodes are formed, but separated from the plurality of second electrodes,

the plurality of second electrodes and the second portion are made of different material from that of the wirings,

the first portion is electrically connected to the second portion through a contact portion formed in an insulating film between the first portion and the plurality of second electrodes, and is formed on the layer where the wirings are formed,

the wiring is electrically connected to the first electrode and second electrode through a connection portion which is provided on the insulating film on an end portion of the first and second electrode respectively,

the insulating film is made of a negative resist,

the plurality of second electrodes and the second portion are formed using electrically conductive transparent material, and

the electrically conductive transparent material of the second portion is provided in the contact portion.

7. The touch panel according to claim 6, wherein

the wirings and the first portion are formed using electrically conductive metal material having a lower resistance value than a resistance value of the second electrodes and the second portion.

8. The touch panel according to claim 6, wherein

each of the plurality of second electrodes has a portion, located between adjacent two electrodes of the plurality of first electrodes, wider than another portion thereof which three dimensionally intersects the first portion, and

the second portion is formed wider between adjacent two electrodes of the plurality of second electrodes than the first portion.

9. The touch panel according to claim 6, further comprising a protective film formed on the substrate so as to cover the plurality of first electrodes and the plurality of second electrodes.

10. The touch panel according to claim 9, wherein the protective film is negative resist