DISPLAY SYSTEM HAVING A CAPACITIVE TOUCH PANEL AND MANUFACTURING METHODS OF THE SAME

• US 20120026128A1
• Filed: 06/07/2011
• Published: 02/02/2012
• Est. Priority Date: 07/30/2010
• Status: Abandoned Application

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: CHEN, Wen-Lung, TSENG, Yu-Chun
• Application Number:
  US13/155,314
• Publication Number:
  US 20120026128A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04111 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
• 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: Y10T 29/49105 Switch making

Abstract

A display system having a capacitive touch panel is described. The capacitive touch panel includes an electrode circuit formed on a substrate. The electrode circuit has a first electrode including a plurality of first conducting patterns and a second electrode including a plurality of second conducting patterns. The first conducting patterns are electrically connected to each other. A plurality of signal wires is formed on the substrate. A dielectric layer covers the electrode circuit. An electrode bridge structure is formed on the dielectric layer and is electrically connected to the second conducting patterns of the electric circuit, such that the second conducting patterns are electrically connected to each other. The electrode bridge structure having uniform thickness is formed by the metal open repair technique. A method of manufacturing a display system is also described.

Claims

1. A display system having a capacitive touch panel, wherein the capacitive touch panel comprises:

a substrate;

an electrode circuit formed on the substrate and having a first electrode along a first direction and a second electrode along a second direction, wherein the first electrode comprises a plurality of first conducting patterns electrically connected to each other and the second electrode comprises a plurality of second conducting patterns electrically insulated from the first electrode;

a plurality of signal wires formed on the substrate and electrically connected to the first electrode and the second electrode of the electrode circuit;

a dielectric layer formed on the electrode circuit and partially covering the electrode circuit; and

an electrode bridge structure formed on the dielectric layer and the electrode circuit, and electrically connected to the second conducting patterns of the electrode circuit, such that the second conducting patterns are electrically connected to each other, wherein the electrode bridge structure has a thickness greater than that of the dielectric layer and the electrode bridge structure is electrically insulated from the first electrode of the electrode circuit by the dielectric layer.

2. The display system of claim 1, wherein the substrate comprises a material selected from one group consisting of a glass, plastic and transparent material.

3. The display system of claim 1, wherein the dielectric layer has a thickness within a range from 0.1 μ

m to 5 μ

m.

4. The display system of claim 1, wherein the electrode bridge structure comprises an alloy material.

5. The display system of claim 1, wherein the electrode bridge structure is configured as a metal line which is formed by a metal open repair technique.

6. The display system of claim 5, wherein the metal line has a width within a range from 3.0 μ

m to 50 μ

m, a length within a range from 50 μ

m to 2 mm, and a thickness within a range from 0.3 μ

m to 10 μ

m.

7. The display system of claim 1, further comprising a power supply electrically connected to the capacitive touch panel to supply power thereto, wherein the display system is selected from one group consisting of a mobile phone, a digital camera, a personal digital assistant (PDA), a notebook computer, a desktop computer, a television set, a global positioning system (GPS), an automobile display, a flight display, and a portable digital versatile disk (DVD).

8. A method of manufacturing a display system having a capacitive touch panel comprising:

forming a first conducting layer on a substrate;

forming a second conducting layer on the first conducting layer;

patterning the second conducting layer to form a plurality of signal wires and expose the first conducting layer;

etching the first conducting layer to form an electrode circuit having a first electrode along a first direction and a second electrode along a second direction, wherein the first electrode comprises a plurality of first conducting patterns electrically connected to each other and the second electrode comprises a plurality of second conducting patterns electrically insulated from the first electrode;

forming a dielectric layer on the electrode circuit to partially cover the electrode circuit; and

forming an electrode bridge structure on the dielectric layer and the electrode circuit, and electrically connected to the second conducting patterns of the electrode circuit, such that the second conducting patterns are electrically connected to each other, wherein the electrode bridge structure has a thickness greater than that of the dielectric layer and the electrode bridge structure is electrically insulated from the first electrode of the electrode circuit by the dielectric layer.

9. The method of claim 8, wherein the substrate comprises a material selected from one group consisting of a glass, plastic and transparent material.

10. The method of claim 8, wherein the dielectric layer has a thickness within a range from 0.1 μ

m to 5 μ

m.

11. The method of claim 8, wherein the electrode bridge structure comprises an alloy material.

12. The method of claim 8, wherein the electrode bridge structure is configured as a metal line which is formed by a metal open repair technique.

13. The method of claim 12, wherein the metal line has a width within a range from 3.0 μ

m to 50 μ

m, a length within a range from 50 μ

m to 2 mm, and a thickness within a range from 0.3 μ

m to 10 μ

m.