DUAL-SUBSTRATE CAPACITIVE TOUCH PANEL

• US 20110017524A1
• Filed: 07/27/2009
• Published: 01/27/2011
• Est. Priority Date: 07/27/2009
• Status: Abandoned Application

• Current Assignee: Emerging Display Technologies Corporation
• Original Assignee: Emerging Display Technologies Corporation
• Inventors: Chen, Chien Lung, Chen, Wen-Jye, Chen, Chien-Cheng, Kao, Neng-Sen
• Application Number:
  US12/509,782
• Publication Number:
  US 20110017524A1
• Time in Patent Office: Days
• US Class Current: 178/18.06
• 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 3/0445 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

Abstract

A touch panel has a first substrate, a second substrate, a frame adhesive and multiple multi-layer conductive wires. The first substrate has first axis electrode strings and second axis transparent electrodes formed on a surface. The second substrate is disposed opposite to the first substrate and has bridging members and bridging connectors formed on each of the bridging members and connected to the second axis electrodes of the first substrate. The frame adhesive connects the first substrate and the second substrate. The multi-layer conductive wires are electrically connected to the first axis electrode strings and the second axis transparent electrodes and connect to a flexible printed circuit board. With the bridging members and bridging connectors formed on another substrate, a mask process of forming insulating members can be avoided, and a manufacture process is simplified with associated cost reductions.

Claims

1. A dual-substrate capacitive touch panel comprising:

a first substrate having

a surface;

multiple first axis electrode strings formed on the surface; and

multiple second axis transparent electrodes formed on the surface;

a second substrate disposed opposite to the first substrate and having

a surface facing the surface of the first substrate; and

multiple bridging members formed on the surface of the second substrate; and

multiple bridging connectors formed on each of the bridging members and connected to the second axis electrodes of the first substrate;

frame adhesive formed between edges of the surfaces of the first substrate and the second substrate, receiving multiple hard spacers and connecting the first substrate and the second substrate to form a sealed chamber, wherein the chamber is spread with multiple elastic spacers and filled with optical adhesive; and

multiple multi-layer conductive wires electrically connected to the first axis electrode strings and the second axis transparent electrodes and each multi-layer conductive wire comprising multiple stacked conductors with different resistance values.

2. The dual-substrate capacitive touch panel as claimed in claim 1, wherein the multi-layer conductive wires are formed on the surface of the first substrate.

3. The dual-substrate capacitive touch panel as claimed in claim 1, wherein the multi-layer conductive wires are formed on the surface of the second substrate.

4. The dual-substrate capacitive touch panel as claimed in claim 1, wherein

the first substrate is an upper substrate having a bottom surface;

the first axis electrode strings and the second axis transparent electrodes are formed on the bottom surface of the upper substrate;

the second substrate is a lower substrate having a top surface; and

the bridging members with bridging connectors are formed on the top surface of the lower substrate.

5. The dual-substrate capacitive touch panel as claimed in claim 1, wherein

the first substrate is a lower substrate having a top surface;

the first axis electrode strings and the second axis transparent electrodes are formed on the top surface of the lower substrate;

the second substrate is an upper substrate having a bottom surface; and

the bridging members with bridging connectors are formed on the bottom surface of the upper substrate.

6. The dual-substrate capacitive touch panel as claimed in claim 1, wherein

the first axis electrode strings are X-axis electrode strings comprising multiple X-axis transparent electrodes and multiple X-axis connection wires connecting the X-axis transparent electrodes;

and

the second axis transparent electrodes are Y-axis transparent electrodes.

7. The dual-substrate capacitive touch panel as claimed in claim 1, wherein

the first axis electrode strings are Y-axis electrode strings comprising multiple Y-axis transparent electrodes and multiple Y-axis connection wires connecting the Y-axis transparent electrodes;

and

the second axis transparent electrodes are X-axis transparent electrodes.

8. The dual-substrate capacitive touch panel as claimed in claim 4 further comprising a pattern layer formed on the lower surface of the upper substrate.

9. The dual-substrate capacitive touch panel as claimed in claim 5 further comprising a pattern layer formed on the lower surface of the upper substrate.

10. The dual-substrate capacitive touch panel as claimed in claim 8, wherein the pattern layer is a black matrix layer.

11. The dual-substrate capacitive touch panel as claimed in claim 9, wherein the pattern layer is a black matrix layer.

12. The dual-substrate capacitive touch panel as claimed in claim 8, wherein the pattern layer is a metallic layer.

13. The dual-substrate capacitive touch panel as claimed in claim 9, wherein the pattern layer is a metallic layer.

14. The dual-substrate capacitive touch panel as claimed in claim 1, wherein the stacked conductors are transparent electrodes.

15. The dual-substrate capacitive touch panel as claimed in claim 1, wherein each multi-layer conductive wire has a double-layer structure configured by an inner conductor and an outer conductor.