TOUCH PANEL AND SYSTEM FOR DISPLAYING IMAGES UTILIZING THE SAME

• US 20100045625A1
• Filed: 08/19/2009
• Published: 02/25/2010
• Est. Priority Date: 08/21/2008
• Status: Abandoned Application

• Current Assignee: InnoLux Corporation
• Original Assignee: TPO Displays Corporation (InnoLux Corporation)
• Inventors: Lin, Wei-Cheng, Chang, Ting-Kuo, Yang, Kai-Chieh
• Application Number:
  US12/543,661
• Publication Number:
  US 20100045625A1
• Time in Patent Office: Days
• US Class Current: 345/173
• 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

An embodiment of the invention provides a touch panel, which includes a substrate, a lower conductive layer overlaying the substrate, an insulating layer overlaying the lower conductive layer, and an upper conductive layer overlaying the insulating layer. The lower conductive layer includes a plurality of first conductive patterns including a plurality of first electrodes and a plurality of first dummy patterns, wherein the first dummy patterns are electrically insulated from the first conductive patterns. The upper conductive layer includes a plurality of second conductive patterns including a plurality of second electrodes respectively overlapping the first dummy patterns and a plurality of second dummy patterns, wherein the second dummy patterns are electrically insulated from the second conductive patterns and respectively overlapping the first electrodes.

Claims

1. A touch panel, comprising:

a substrate;

a lower conductive layer overlaying the substrate, wherein the lower conductive layer comprises;

a plurality of first conductive patterns comprising a plurality of first electrodes; and

a plurality of first dummy patterns electrically insulated from the first conductive patterns;

an insulating layer overlaying the lower conductive layer; and

an upper conductive layer overlaying the insulating layer, wherein the upper conductive layer comprises;

a plurality of second conductive patterns comprising a plurality of second electrodes respectively overlapping the first dummy patterns; and

a plurality of second dummy patterns electrically insulated from the second conductive patterns and respectively overlapping the first electrodes.

2. The touch panel as claimed in claim 1, wherein shapes and areas of the first electrodes and the second dummy patterns are the same.

3. The touch panel as claimed in claim 1, wherein shapes and areas of the second electrodes and the first dummy patterns are the same.

4. The touch panel as claimed in claim 1, wherein the first dummy patterns are electrically connected to the second electrodes.

5. The touch panel as claimed in claim 1, wherein the second dummy patterns are electrically connected to the first electrodes.

6. The touch panel as claimed in claim 1, wherein peripheries of the second dummy patterns extend over peripheries of the first electrodes.

7. The touch panel as claimed in claim 6, wherein peripheries of the first dummy patterns extend over peripheries of the second electrodes.

8. The touch panel as claimed in claim 1, wherein peripheries of the first electrodes extend over peripheries of the second dummy patterns.

9. The touch panel as claimed in claim 8, wherein peripheries of the second electrodes extend over peripheries of the first dummy patterns.

10. The touch panel as claimed in claim 1, wherein at least one of the first dummy patterns comprises a plurality of first sub-dummy patterns.

11. The touch panel as claimed in claim 10, wherein spacings between the first sub-dummy patterns equal to a smallest lateral distance between peripheries of the second electrodes and peripheries of the first electrodes.

12. The touch panel as claimed in claim 1, wherein at least one of the second dummy patterns comprises a plurality of second sub-dummy patterns.

13. The touch panel as claimed in claim 12, wherein spacings between the second sub-dummy patterns equal to a smallest lateral distance between peripheries of the second electrodes and peripheries of the first electrodes.

14. The touch panel as claimed in claim 1, wherein at least one of the first conductive patterns further comprises a plurality of first bridge portions electrically connected to the first electrodes to term one of the first conductive patterns.

15. The touch panel as claimed in claim 1, wherein at least one of the second conductive patterns further comprises a plurality of second bridge portions electrically connected to the second electrodes to form one of the second conductive patterns.

16. The touch panel as claimed in claim 1, wherein the first conductive patterns and the first dummy patterns are portions of a same layer.

17. The touch panel as claimed in claim 1, wherein the second conductive patterns and the second dummy patterns are portions of a same layer.

18. A system for displaying images, comprising:

a display device comprising the touch panel as claimed in claim 1.

19. The system for displaying images as claimed in claim 18, further comprising:

an electronic device, wherein the electronic device comprises;

the display device; and

an input element coupled to the display device and providing a signal to the display device for displaying images.

20. The system for displaying images as claimed in claim 19, wherein the electronic device is a mobile phone, a digital camera, a personal digital assistant, a portable computer, a personal computer, a television, a vehicle display, or a portable DVD.