TOUCH PANEL

• US 20150199056A1
• Filed: 03/25/2015
• Published: 07/16/2015
• Est. Priority Date: 09/27/2012
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Ando, Masamichi
• Granted Patent: US 10,025,443 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0445 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: G06F 3/047 using sets of wires, e.g. crossed wires
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections

Abstract

A touch panel having a structure in which first capacitance detection conductors, a first insulating layer, second capacitance detection conductors, a second insulating layer, a shied conductor, a third insulating layer, and backside wiring conductors are disposed in this order in a thickness direction. The second capacitance detection conductors and the backside wiring conductors are connected through conductors formed near ends of the second capacitance detection conductors in a longitudinal direction. The first capacitance detection conductors are extracted to a predetermined side by first extraction conductors, and the second capacitance detection conductors are extracted to the predetermined side by the through conductors, the backside wiring conductors, and second extraction conductors.

Claims

1. A touch panel comprising:

a plurality of first capacitance detection conductors that are spaced from each other and extend along a first direction of;

a plurality of second capacitance detection conductors that are spaced from each other and extend along a second direction orthogonal to the first direction;

a first insulating layer disposed between the plurality of first capacitance detection conductors and the plurality of second capacitance detection conductors;

a plurality of first extraction conductors each having a first end disposed adjacent to a first side of the first insulating layer in the first direction, and a second end connected to a respective one of the plurality of first capacitance detection conductors;

a plurality of operation-surface-side wiring conductors projecting along the second direction from an end of a respective one of the plurality of second capacitance detection conductors and having a predetermined length;

a plurality of backside wiring conductors, each of which corresponds to a respective one of the plurality of second capacitance detection conductors, and each of which is wider than the operation-surface-side wiring conductors;

a second insulating layer disposed between the plurality of backside wiring conductors and the plurality of second capacitance detection conductors;

a plurality of layer-direction connection conductors that each connect the plurality of operation-surface-side wiring conductors to a respective one of the plurality of backside wiring conductors; and

a plurality of second extraction conductors each having a first end disposed adjacent to the first side of the first insulating layer in the first direction, and a second end connected to a respective one of the plurality of backside wiring conductors.

2. The touch panel according to claim 1, wherein the plurality of first capacitance detection conductors, the plurality of second capacitance detection conductors, the first insulating layer, the second insulating layer, the plurality of first extraction conductors, the plurality of operation-surface-side wiring conductors, the plurality of backside wiring conductors, and the plurality of second extraction conductors are made of a material having translucency.

3. The touch panel according to claim 2, wherein the plurality of layer-direction connection conductors are made of a material having translucency.

4. The touch panel according to claim 1, wherein the plurality of layer-direction connection conductors are composed of a through conductor penetrating through the second insulating layer.

5. The touch panel according to claim 1, wherein

the plurality of second capacitance detection conductors and the plurality of backside wiring conductors are arranged side by side on a same plane of the second insulating layer,

the plurality of second capacitance detection conductors and the plurality of backside wiring conductors are connected with linear conductors,

the plurality of second capacitance detection conductors and the plurality of backside wiring conductors are disposed across the second insulating layer by folding a region of the second insulating layer where the linear conductors are located, and

the plurality of operation-surface-side wiring conductors and the plurality of layer-direction connection conductors are formed of the linear conductors.

6. The touch panel according to claim 5, further comprising

a third insulating layer disposed between the plurality of first capacitance detection conductors and the plurality of second capacitance detection conductors.

7. The touch panel according to claim 5, wherein

the plurality of first capacitance detection conductors and the plurality of second capacitance detection conductors are arranged side by side on a same plane of the second insulating layer, and

a first formation region of the plurality of first capacitance detection conductors and a second formation region of the plurality of second capacitance detection conductors are disposed across the first insulating layer when an intermediate position between the first formation region and the second formation region on the second insulating layer is folded.

8. The touch panel according to claim 1, further comprising

a shield conductor disposed between the plurality of second capacitance detection conductors and the plurality of backside wiring conductors.

9. The touch panel according to claim 8, further comprising

a third insulating layer disposed between the plurality of second capacitance detection conductors and the shield conductor.