DISPLAY WITH IN-CELL TOUCH SENSOR

• US 20110242027A1
• Filed: 03/23/2011
• Published: 10/06/2011
• Est. Priority Date: 04/02/2010
• Status: Active Grant

• Current Assignee: Arolltech Co., Ltd.
• Original Assignee: Arolltech Co., Ltd.
• Inventors: CHANG, YIH
• Granted Patent: US 8,994,669 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires

Abstract

The present invention discloses a display with in-cell touch sensors comprising a first substrate, a second substrate, and a touch sensor disposed on the second substrate. A thin-film transistor (TFT) array is disposed on a surface of the first substrate, and a color pixel array is disposed on a surface of the second substrate. The TFT array faces and is aligned with the color pixel array. The touch sensor comprises a plurality of electrodes, a plurality of first leads, and a plurality of first pads. Each of the first leads is connected to one of the electrodes and one of the first pads. There are a plurality of second pads, a plurality of second leads, a plurality of connecting wires, and a plurality of terminal pads. Each of the second leads connects one of the second pads and one of the connecting wires. At least one of the connecting wires simultaneously and electrically connects several of the second leads. Each of the connecting wires electrically connects at least one of the terminal pads. Each of the first pads electrically connects one of the second pads.

Claims

1. A display with in-cell touch sensor, comprising:

a first substrate, wherein a transistor array is disposed on a surface of the first substrate;

a second substrate, wherein a color pixel array is disposed on a surface of the second substrate, and the color pixel array faces and is aligned with the transistor array;

a touch sensor, disposed on the second substrate and comprising a plurality of electrodes, a plurality of first leads and a plurality of first pads, wherein each of the first leads is connected to one of the electrodes and one of the first pads; and

a connecting circuit, disposed on the first substrate and comprising a plurality of second pads, a plurality of second leads and a plurality of connecting wires, wherein each of the second leads is connected to one of the second pads and one of the connecting wires, and at least one of the connecting wires is electrically connected to several of the second leads;

wherein each of the first pads is electrically connected to one of the second pads.

2. The display with in-cell touch sensor of claim 1, wherein the connecting circuit further comprises a plurality of terminal pads, and each of the connecting wires is electrically connected to at least one of the terminal pads.

3. The display with in-cell touch sensor of claim 1, further comprising a surrounding circuit disposed surrounding the plurality of electrodes to function as a protection circuit, a shielding circuit or reference electrode.

4. The display with in-cell touch sensor of claim 3, wherein the surrounding circuit comprises a first conductive wire surrounding the outer side of the plurality of first pads and the plurality of electrodes and a plurality of second conductive wires located at both sides of the plurality of electrodes.

5. The display with in-cell touch sensor of claim 1, wherein each of the electrodes is a conductive wire arranged in grid manner, and the conductive wire is aligned with the interval of the color pixel array and is disposed on the second substrate.

6. The display with in-cell touch sensor of claim 1, wherein the plurality of electrodes comprise a plurality of first electrodes extending along a first direction and a plurality of second electrodes aligned along a second direction.

7. The display with in-cell touch sensor of claim 1, wherein the plurality of second leads are isolated from the plurality of connecting wires by at least an insulation layer, a plurality of vias filled with metal or conductive materials are formed in the at least an insulation layer, and at least one of the connecting wires is electrically connected to several of the second leads through the plurality of vias.

8. The display with in-cell touch sensor of claim 1, wherein the transistor array comprises at least two metal layers, the plurality of second leads are in one metal layer, and the plurality of connecting wires are in another metal layer.

9. The display with in-cell touch sensor, comprising:

a first substrate, wherein a transistor array is disposed on a surface of the first substrate;

a second substrate, wherein a color pixel array is disposed on a surface of the second substrate, and the color pixel array faces and is aligned with the transistor array;

a touch sensor, disposed on the second substrate and comprising a plurality of electrodes, a plurality of first leads and a plurality of first pads, wherein each of the first leads is connected to one of the electrodes and one of the first pads, the plurality of first pads are divided into two first pad groups, one first pad group comprises the first pads disposed on one side of the second substrate, and the other first pad group comprises the first pads disposed on the other side of the second substrate; and

a connecting circuit, disposed on the first substrate and comprising a plurality of second pads, a plurality of second leads and a plurality of connecting wires, wherein each of the second leads is connected to one of the second pads and one of the connecting wires, and at least one of the connecting wires is electrically connected to several of the second leads;

wherein each of the first pads is electrically connected to one of the second pads.

10. The display with in-cell touch sensor of claim 9, wherein the connecting circuit further comprises a plurality of terminal pads, and each of the connecting wires is electrically connected to at least one of the terminal pads.

11. The display with in-cell touch sensor of claim 9, further comprising a surrounding circuit disposed surrounding the plurality of electrodes to function as a protection circuit, a shielding circuit or reference electrode.

12. The display with in-cell touch sensor of claim 11, wherein the surrounding circuit comprises a first conductive wire and a plurality of second conductive wires, the first conductive wire surrounds the outer side of the plurality of first pads and the plurality of electrodes, and the plurality of second conductive wires are disposed at both sides of the plurality of electrodes.

13. The display with in-cell touch sensor of claim 9, wherein each of the electrodes is a conductive wire arranged in grid manner, and the conductive wire is aligned with the interval of the color pixel array and is disposed on the second substrate.

14. The display with in-cell touch sensor of claim 9, wherein the plurality of electrodes comprise a plurality of first electrodes extending along a first direction and a plurality of second electrodes aligned along a second direction.

15. The display with in-cell touch sensor of claim 9, wherein the plurality of second leads are isolated from the plurality of connecting wires by at least an insulation layer, a plurality of vias filled with metal or conductive materials are formed in the at least an insulation layer, and at least one of the connecting wires is electrically connected to several of the second leads through the plurality of vias.

16. The display with in-cell touch sensor of claim 9, wherein the transistor array comprises at least two metal layers, the plurality of second leads are in one metal layer, and the plurality of connecting wires are in another metal layer.

17. The display with in-cell touch sensor of claim 9, wherein the plurality of second pads are divided into two second pad groups, one second pad group comprises the second pads disposed on one side of the first substrate, and the other second pad group comprises the second pads disposed on the other side of the first substrate.

18. A display with in-cell touch sensor, comprising:

a substrate, wherein a transistor array is disposed on a surface of the substrate, and a color pixel array is disposed over and aligned with the transistor array;

a touch sensor, disposed on the substrate and comprising a plurality of electrodes, a plurality of first leads and a plurality of first pads, wherein each of the first leads is connected to one of the electrodes and one of the first pads; and

a connecting circuit, disposed on the substrate and comprising a plurality of second pads, a plurality of second leads and a plurality of connecting wires, wherein each of the second leads is connected to one of the second pads and one of the connecting wires, and at least one of the connecting wires is electrically connected to several of the second leads;

wherein each of the first pads is electrically connected to one of the second pads.

19. The display with in-cell touch sensor of claim 18, wherein the connecting circuit further comprises a plurality of terminal pads, and each of the connecting wires is electrically connected to at least one of the terminal pads.

20. The display with in-cell touch sensor of claim 18, further comprising a surrounding circuit disposed surrounding the plurality of electrodes to function as a protection circuit, a shielding circuit or reference electrode.

21. The display with in-cell touch sensor of claim 20, wherein the surrounding circuit comprises a first conductive wire and a plurality of second conductive wires, the first conductive wire surrounds the outer side of the plurality of first pads and the plurality of electrodes, and the plurality of second conductive wires are disposed at both sides of the plurality of electrodes.

22. The display with in-cell touch sensor of claim 18, wherein each of the electrodes is a conductive wire arranged in grid manner, and the conductive wire is aligned with the interval of the color pixel array and is disposed on the second substrate.

23. The display with in-cell touch sensor of claim 18, wherein the plurality of electrodes comprise a plurality of first electrodes extending along a first direction and a plurality of second electrodes aligned along a second direction.

24. The display with in-cell touch sensor of claim 18, wherein the plurality of second leads are isolated from the plurality of connecting wires by at least an insulation or a planarization layer, a plurality of vias filled with metal or conductive materials are formed in the at least an insulation or planarization layer, and at least one of the connecting wires is electrically connected to several of the second leads through the plurality of vias.

25. The display with in-cell touch sensor of claim 18, wherein the transistor array comprises at least two metal layers, the plurality of second leads are in one metal layer, and the plurality of connecting wires are in another metal layer.

26. A display with in-cell touch sensor, comprising:

a first substrate, wherein a transistor array is disposed on a surface of the substrate;

a second substrate, wherein a color pixel array is disposed on a surface of the second substrate, a polarizer is disposed on the other surface of the second substrate, and the color pixel array faces and is aligned with the transistor array;

a touch sensor, disposed between the color pixel array and the polarizer and comprising a plurality of electrodes, a plurality of first leads and a plurality of first pads, wherein each of the first leads is connected to one of the electrodes and one of the first pads; and

a connecting circuit comprising a plurality of second pads, a plurality of second leads and a plurality of connecting wires, wherein each of the second leads is connected to one of the second pads and one of the connecting wires, and at least one of the connecting wires is electrically connected to several of the second leads, wherein each of the first pads is electrically connected to one of the second pads.

27. The display with in-cell touch sensor of claim 26, further comprising a surrounding circuit disposed surrounding the plurality of electrodes and pads to function as a protection circuit, a shielding circuit or reference electrode.

28. The display with in-cell touch sensor of claim 26, wherein each of the electrodes is a conductive wire arranged in grid manner.

29. The display with in-cell touch sensor of claim 26, wherein the plurality of electrodes comprise a plurality of first electrodes extending along a first direction and a plurality of second electrodes aligned along a second direction.