Touch panel

• US 9,086,772 B2
• Filed: 11/19/2013
• Issued: 07/21/2015
• Est. Priority Date: 09/13/2013
• Status: Active Grant

• Current Assignee: Henghao Technology Company Limited (Compal Electronics Incorporated)
• Original Assignee: Henghao Technology Company Limited (Compal Electronics Incorporated)
• Inventors: Lee, Chien-Yi
• Primary Examiner(s): Bolotin, Dmitriy
• Application Number:
  US14/084,300
• Publication Number:
  US 20150077649A1
• Time in Patent Office: 609 Days
• Field of Search: 345173-178, 178 1801- 2004
• 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 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

A touch panel includes a transparent substrate, electrodes, traces and at least two ground rings on the transparent substrate. The traces connect the electrodes to transmit signals. At least two ground rings connect to each other through a plurality of bridges and surround the electrodes and the traces. Each bridge has at least one ESD tip or peak to enhance local electric field strength and electrostatic discharge.

Claims

1. A touch panel, comprising:

a transparent substrate;

a plurality of electrodes and traces on the transparent substrate, the traces connecting the electrodes to transmit signals; and

a first ground ring and a second ground ring on the transparent substrate and surrounding the electrodes and the traces, a plurality of bridges connecting the first and the second ground rings, the bridge comprising at least one electrostatic discharge tip to enhance a local electric field strength and to initiate electrostatic discharging, wherein the first ground ring and the second ground ring are separated by a space of atmosphere so that the bridges across the space of atmosphere initiate electrostatic discharging toward atmosphere environment.

2. The touch panel of claim 1, wherein a shape of the bridge comprises a dual triangles with two connecting tips.

3. The touch panel of claim 1, wherein the electrode comprises a structure of conductive material, the conductive material comprises indium tin oxide (ITO), indium zinc oxide (IZO), Al-doped ZnO (AZO) or antimony tin oxide (ATO), nano-silver or nano-copper.

4. The touch panel of claim 1, wherein the grounding ring comprises indium tin oxide, indium zinc oxide, aluminum zinc oxide, or antimony tin oxide.

5. The touch panel of claim 1, wherein a shape of the bridge comprises a geometric shape which can increase the local electric field strength.

6. The touch panel of claim 1, wherein the touch panel comprises a one glass substrate touch panel or a one film substrate touch panel.