EMBEDDED TOUCH SENSITIVE DISPLAY AND METHOD OF MANUFACTURING THE SAME

• US 20110175828A1
• Filed: 08/19/2010
• Published: 07/21/2011
• Est. Priority Date: 01/21/2010
• Status: Active Grant

• Current Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Original Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Inventors: Wang, Ching-Yi, Liu, Chen-Yu
• Granted Patent: US 8,970,510 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• 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
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures

Abstract

The present invention relates to an embedded touch sensitive display, which includes a liquid crystal display (LCD), a touch sensing layer, a touch signal transfer circuit and a conductive media. The liquid crystal display comprises a top substrate, a bottom substrate, and a liquid crystal layer which is configured between the top substrate and the bottom substrate. The touch sensing layer is disposed below the top substrate of the LCD for generating touch signals after sensing an outside touch action, and the touch signal transfer circuit is disposed above the bottom substrate of the LCD. The conductive media is disposed between the touch sensing layer and the touch signal transfer circuit for transferring the touch signals between the touch sensing layer and the touch signal transfer circuit.

Claims

1. An embedded touch sensitive display, comprising:

a top substrate;

a bottom substrate;

a liquid crystal layer configured between the top substrate and the bottom substrate;

a touch sensing layer disposed below the top substrate;

a touch signal transfer circuit disposed above the bottom substrate; and

a conductive media disposed between the touch sensing layer and the touch signal transfer circuit.

2. The display of claim 1, wherein the touch sensing layer comprises a touch sensing electrode layer and a touch sensing peripheral circuit layer.

3. The display of claim 1, wherein the touch signal transfer circuit is coupled to a flexible circuit board.

4. The display of claim 3, wherein the flexible circuit board is in a peripheral bonding area of the bottom substrate.

7. The display of claim 1, wherein the conductive media comprises at least one conductive element.

8. The display of claim 1, wherein the conductive media comprises at least one of a) silver conductive ink and b) silver conductive adhesive.

9. The display of claim 1, wherein the conductive media comprises:

a space point formed below the top substrate; and

a conductive film covering the space point.

10. The display of claim 7, wherein the space point comprises at least one of the following:

single shielding layer, multiple shielding layers, single colorresist layer, and multiple colorresist layers.

11. The display of claim 2, wherein the touch sensing peripheral circuit layer, the touch signal transfer circuit and the conductive media are disposed in a peripheral area of the touch sensitive display.

5. The display of claim wherein the touch signal transfer circuit comprises, at least one conductive circuit.

6. The display of claim 5, wherein the touch signal transfer circuit further comprises a bottom transparent conductive layer and an insulating layer disposed between the conductive circuit and the bottom transparent conductive layer.

12. A method of manufacturing an embedded touch sensitive display, comprising:

forming a touch sensing layer below a top substrate of a liquid crystal display;

forming a touch signal transfer circuit above a bottom substrate of the liquid crystal display; and

forming a conductive media between the touch sensing layer and the touch signal transfer circuit.

13. The method of claim 12, wherein the touch sensing layer comprises a touch sensing electrode layer and a touch sensing peripheral circuit layer.

14. The method of claim 12, further comprising forming a flexible circuit board in a peripheral bonding area of the bottom substrate.

15. The method of claim 12, wherein the touch signal transfer circuit comprises at least one conductive circuit.

16. The method of claim 15, wherein the touch signal transfer circuit further comprises a bottom transparent conductive layer and an insulating layer disposed between the conductive circuit and the bottom transparent conductive layer.

17. The method of claim 12, wherein forming the conductive media comprises affixing at least one conductive element.

18. The method of claim 12, wherein forming the conductive media comprises at least one of the steps of a) affixing silver conductive ink and b) affixing silver conductive adhesive.

19. The method of claim 12, wherein the conductive media comprises:

a space point formed below the top substrate; and

a conductive film covering the space point.

20. The method of claim 18, wherein the space point comprises at least one of the following:

single shielding layer, multiple shielding layers, single colorresist layer and multiple colorresist layers.

21. The method of claim 13, wherein the touch sensing peripheral circuit layer, the touch signal transfer circuit and the conductive media are formed in a peripheral area of the touch sensitive display.

22. A display, comprising

a touch sensing layer disposed below a top substrate;

a touch signal transfer circuit disposed above a bottom substrate; and

a conductive media disposed between the top substrate and the bottom substrate.

23. The display of claim 22, wherein the conductive media comprises:

a space point between top substrate and the bottom, substrate; and

a conductive film covering the space point.

24. A display, comprising

sensing layer disposed below a top substrate for sensing outside touch and generate resultant touch signals;

touch signal transfer circuit disposed above a bottom substrate for receiving touch signals for controlling; and

conductive media disposed between the top substrate and the bottom substrate for electrically transferring touch signals.

25. The display of claim 24, wherein the sensing layer comprises Sensing Technology.