TOUCH PANEL AND TOUCH LIQUID CRYSTAL DISPLAY USING THE SAME

• US 20090086113A1
• Filed: 09/04/2008
• Published: 04/02/2009
• Est. Priority Date: 09/29/2007
• Status: Abandoned Application

• Current Assignee: Chunghwa Picture Tubes Limited
• Original Assignee: Chunghwa Picture Tubes Limited
• Inventors: Ko, Han-Ching, Chang, Min-Hung
• Application Number:
  US12/203,930
• Publication Number:
  US 20090086113A1
• Time in Patent Office: Days
• US Class Current: 349/12
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A touch panel and a touch liquid crystal display (LCD) using the touch panel are provided. The structure of the touch panel is directly formed on an upper polarizer instead of a glass substrate. Thereby, the process of integrating the touch panel and an LCD panel is simplified and the glass substrate of the touch panel is eliminated. Thus, the cost, the thickness and the weight of the touch LCD are reduced.

Claims

1. A touch panel, comprising:

a polarizer, having a plurality of first electrodes;

a contact layer, having a plurality of second electrodes; and

an intermediate layer, disposed between the polarizer and the contact layer.

2. The touch panel as claimed in claim 1, wherein the material of the contact layer comprises PET film, glass or polymer film, and the second electrodes are formed on a surface of the contact layer.

3. The touch panel as claimed in claim 1, wherein the first electrodes are formed on a surface of the polarizer.

4. The touch panel as claimed in claim 1, wherein the material of the first electrodes comprises indium tin oxide.

5. The touch panel as claimed in claim 1, wherein the material of the second electrodes comprises indium tin oxide.

6. The touch panel as claimed in claim 1, wherein the first electrodes and the second electrodes are disposed in opposite directions and are perpendicular to each other.

7. The touch panel as claimed in claim 1, wherein the intermediate layer comprises a plurality of spacer dots for spacing the polarizer and the contact layer.

8. A touch panel, comprising:

a polarizer;

a conductive layer, disposed on a polarizer;

an electrode pattern layer, wherein the electrode pattern layer has a plurality of first electrodes and second electrodes on upper and lower surfaces thereof respectively, and the electrode pattern layer is disposed on the conductive layer; and

a protective layer, disposed on the electrode pattern layer, for protecting the electrode pattern layer.

9. The touch panel as claimed in claim 8, wherein the material of the protective layer comprises PET film.

10. The touch panel as claimed in claim 8, wherein the material of the electrode pattern layer comprises glass, and the first electrodes and the second electrodes are respectively formed on the upper and the lower surfaces of the electrode pattern layer.

11. The touch panel as claimed in claim 8, wherein the material of the first electrodes comprises ITO.

12. The touch panel as claimed in claim 8, wherein the material of the second electrodes comprises ITO.

13. A touch liquid crystal display (LCD), comprising:

a lower polarizer;

an LCD display unit, disposed on the lower polarizer;

an upper polarizer, disposed on the LCD display unit, and the upper polarizer has a plurality of first electrodes on a surface opposite to the LCD display unit;

a contact layer, having a plurality of second electrodes, and disposed on the upper polarizer; and

an intermediate layer, disposed between the upper polarizer and the contact layer, for spacing the first electrodes and the second electrodes.

14. The touch LCD as claimed in claim 13, wherein the LCD display unit at least comprises a first substrate and a second substrate, the upper polarizer is located on the first substrate, the lower polarizer is located under the second substrate, and the first substrate and the second substrate are disposed in opposite directions and are sandwiched with the liquid crystal.

15. The touch LCD as claimed in claim 13, wherein the material of the contact layer comprises PET film, glass or polymer film, and the second electrodes are formed on a surface of the contact layer.

16. The touch LCD as claimed in claim 13, wherein the first electrodes are formed on a surface of the upper polarizer.

17. The touch LCD as claimed in claim 13, wherein the material of the first electrodes comprises ITO.

18. The touch LCD as claimed in claim 13, wherein the material of the second electrodes comprises ITO.

19. The touch LCD as claimed in claim 13, wherein the first electrodes and the second electrodes are disposed in opposite directions and are perpendicular to each other.

20. The touch LCD as claimed in claim 13, wherein the intermediate layer comprises a plurality of spacer dots, for spacing the polarizer and the contact layer.

21. A touch LCD, comprising:

a lower polarizer;

an LCD display unit, disposed on the lower polarizer;

an upper polarizer, disposed on the LCD display unit;

a conductive layer, disposed on the upper polarizer;

an electrode pattern layer, wherein the electrode pattern layer has a plurality of first electrodes and second electrodes on upper and lower surfaces thereof respectively, and the electrode pattern layer is disposed on the conductive layer; and

a protective layer, disposed on the electrode pattern layer, for protecting the electrode pattern layer.

22. The touch LCD as claimed in claim 21, wherein the LCD display unit at least comprises a first substrate and a second substrate, the upper polarizer is located on the first substrate, the lower polarizer is located under the second substrate, and the first substrate and the second substrate are disposed in opposite directions and are sandwiched with the liquid crystal.

23. The touch LCD as claimed in claim 21, wherein the material of the protective layer comprises PET film.

24. The touch LCD as claimed in claim 21, wherein the material of the electrode pattern layer comprises glass, and the first electrodes and second electrodes are respectively formed on upper and lower surfaces of the electrode pattern layer.

25. The touch LCD as claimed in claim 21, wherein the material of the first electrodes comprises ITO.

26. The touch LCD as claimed in claim 21, wherein the material of the second electrodes comprises ITO.

27. The touch LCD as claimed in claim 21, wherein the first electrodes and the second electrodes are disposed in opposite directions and are perpendicular to each other.