Capacitive touch panel

• US 8,441,464 B1
• Filed: 02/20/2013
• Issued: 05/14/2013
• Est. Priority Date: 07/29/2009
• Status: Active Grant

• Current Assignee: Cando Corporation
• Original Assignee: Cando Corporation
• Inventors: Lin, Yu-Kai, Lin, Yih-Jer, Chuang, Wen-Ju
• Primary Examiner(s): Nguyen, Kevin M
• Assistant Examiner(s): Lee, Jr., Kenneth B
• Application Number:
  US13/771,097
• Time in Patent Office: 83 Days
• Field of Search: 345173-182
• US Class Current: 345/174
• 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 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 3/0443 using a single layer of sensing electrodes

Abstract

A capacitive touch panel is disclosed. The capacitive touch panel includes a substrate having a plurality of sensing units, a frame having a hollow opening for accommodating the substrate, and an optical composite layer disposed on the frame. Two adjacent sensing units comprise a distance therebetween. the frame and the substrate form a composite structure. The optical composite layer includes a shielding layer and an ink layer, and the thickness of the shielding layer is adjusted with respect to the distance such that the sensing units are invisible from outside.

Claims

1. A capacitive touch panel, comprising:

a substrate having a plurality of sensing units, wherein two adjacent sensing units comprise a distance therebetween;

a frame having a hollow opening for accommodating the substrate, wherein the frame and the substrate form a composite structure; and

an optical composite layer disposed on the frame, wherein the optical composite layer comprises a shielding layer and an ink layer, and the thickness of the shielding layer is adjusted with respect to the distance such that the sensing units are invisible from outside.

2. The capacitive touch panel of claim 1, wherein the thickness of the frame corresponds to the thickness of the substrate.

3. The capacitive touch panel of claim 1, wherein the frame comprises a plastic material or a metal material.

4. The capacitive touch panel of claim 1, further comprising a passivation layer disposed on the substrate for protecting the sensing units.