Touch panel

• US 9,535,521 B2
• Filed: 11/28/2014
• Issued: 01/03/2017
• Est. Priority Date: 11/21/2014
• Status: Active Grant

• Current Assignee: Interface Optoelectronics (ShenZhen) Co., Ltd. (Cloud Software Group), General Interface Solution Limited (General Interface Solution (GIS) Holding Ltd.)
• Original Assignee: General Interface Solution Limited (General Interface Solution (GIS) Holding Ltd.), interface optoelectronics Corporation
• Inventors: Chang, Chih-Peng, Tseng, Te-Jen, Chiang, Ying-Chieh, Lin, Tzu-Hsiang, Huang, Yen-Heng
• Primary Examiner(s): Mengistu, Amare
• Assistant Examiner(s): MATHEWS, CRYSTAL
• Application Number:
  US14/555,728
• Publication Number:
  US 20160147324A1
• Time in Patent Office: 767 Days
• US Class Current: 1/1
• 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 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• 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

Abstract

A touch panel includes a substrate, plural conducting wires, an insulating layer, and a ground layer. The substrate includes an active region and a peripheral region surrounding the active region. The conducting wires are disposed in the peripheral region and extend along a first direction. The insulating layer is disposed on the conductive wires. The ground layer is disposed at an edge of the peripheral region and at least partially on the insulating layer, and the ground layer is at least partially in contact with the substrate.

Claims

1. A touch panel, comprising:

a substrate comprising an active region and a peripheral region surrounding the active region;

a plurality of conducting wires disposed on one surface of the substrate in the peripheral region and extending along a first direction;

an insulating layer disposed on the conductive wires, and the insulating layer comprising a top surface, a bottom surface opposite to the top surface, and a sidewall connected to the top surface and the bottom surface therebetween, wherein the bottom surface is in contact with the surface of the substrate; and

a ground layer disposed at an edge of the peripheral region and provided with a L type body, wherein one part of the L type body is in contact with the surface of the substrate and the sidewall of the insulating layer, and the other part of the L type body is in contact with the top surface of the insulating layer, and the insulating layer is sandwiched between the substrate and the ground layer.

2. The touch panel of claim 1, wherein a side surface of the substrate and a side surface of the ground layer define a plane which is parallel with the first direction.

3. The touch panel of claim 1, wherein the sidewall of the insulating layer is proximate to a side surface of the substrate and parallel with the first direction, and the ground layer covers the sidewall.

4. The touch panel of claim 3, wherein there is a first distance from the sidewall of the insulating layer to a side surface of one of the conducting wires proximate to the sidewall of the insulating layer, there is a second distance from a top surface of the conducting wires to the top surface of the insulating layer, and a sum of the first distance and the second distance is not less than 100 micrometers.

5. The touch panel of claim 3, wherein there is a third distance from the sidewall of the insulating layer to the side surface of the substrate, there is a fourth distance from the sidewall of the insulating layer to a side surface of an edge of the ground layer covering the insulating layer, and a sum of the third distance and the fourth distance is not less than 50 micrometers.

6. The touch panel of claim 5, wherein a ratio of the fourth distance to the third distance is in a range from about 0.1 to about 10.

7. The touch panel of claim 1, wherein a material of the ground layer has a higher extensibility than that of the conducting wires.

8. The touch panel of claim 1, wherein the ground layer is made of silver.

9. The touch panel of claim 1, further comprising a plurality of contact pads and a plurality of sensing electrode series, wherein the contact pads are disposed in the peripheral region, the sensing electrode series are disposed in the active region, the contact pads are electrically connected to the sensing electrode series, and the conducting wires are connected to the contact pads respectively.

10. The touch panel of claim 9, wherein the insulating layer at least partially covers the contact pads.

11. The touch panel of claim 1, further comprising a protective layer covering the ground layer.