Touch display device and manufacturing method thereof

• US 9,647,040 B2
• Filed: 03/13/2012
• Issued: 05/09/2017
• Est. Priority Date: 07/28/2011
• 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: Liu, Chen-Yu
• Primary Examiner(s): Gondarenko, Natalia
• Application Number:
  US13/419,390
• Publication Number:
  US 20130026501A1
• Time in Patent Office: 1,883 Days
• Field of Search: 257 88, 257 40, 257 72, 257E51018, 438 34, 438 26, 313504, 345174, 345173, 345179
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• 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
• CPC Class Codes: H10K 59/127 comprising two substrates, e.g. display comprising OLED array and TFT driving circuitry on different substrates
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens

Abstract

The present invention discloses a touch display device and a manufacturing method thereof, the display device comprising: an OLED display layer disposed on a lower substrate; an upper substrate; an air layer formed between the upper substrate and the lower substrate; and a touch module, disposed above the OLED display layer, wherein the touch module comprises: a first sensing circuit layer and a second sensing circuit layer, further wherein the first sensing circuit layer and the second sensing circuit layer are spaced and the distance between them is more than 2 μm. The display device can reduce interference in detection circuit caused by coupling capacitance formed between the sensing circuit layers thereby improving accuracy of touch detection.

Claims

1. A touch display device, comprising:

an OLED display layer disposed on a lower substrate and comprising a counter electrode;

an upper substrate;

an air layer formed between the upper substrate and the lower substrate;

a sealing glue layer formed between the upper substrate and the lower substrate;

a capacitive touch module disposed above the OLED display layer, wherein the capacitive touch module comprises;

a first sensing circuit layer, wherein the first sensing circuit layer is a first pattern conducting layer comprising a plurality of first touch electrode serials extending in a first direction, wherein each of the plurality of first touch electrode serials comprises a plurality of electrically connected first touch electrodes, and wherein the first sensing circuit layer is disposed outside a space formed by the upper substrate, the lower substrate and the sealing glue layer; and

a second sensing circuit layer, wherein the second sensing circuit layer is a second pattern conducting layer comprising a plurality of second touch electrode serials extending in a second direction, wherein each of the plurality of the second touch electrode serials comprises a plurality of electrically connected second touch electrodes, wherein the second sensing circuit layer and the OLED display layer are disposed inside the space formed by the upper substrate, the lower substrate and the sealing glue layer, wherein the first sensing circuit layer and the second sensing circuit layer are spaced apart; and

a protection layer disposed on the OLED display layer and in direct contact with the counter electrode, wherein the second sensing circuit layer is in direct contact with the protection layer, and wherein each of the protection layer and the second sensing circuit layer extends in a single plane.

2. The touch display device as claimed in claim 1, wherein the protection layer electrically insulates the second sensing circuit layer from the counter electrode.

3. The touch display device as claimed in claim 1, wherein the air layer is disposed between the first sensing circuit layer and the second sensing circuit layer and wherein a thickness of the air layer between the first sensing circuit layer and the second sensing circuit layer ranges from 5 μ

m to 100 μ

m.

4. The touch display device as claimed in claim 1, wherein the air layer and the upper substrate are between the first sensing circuit layer and the second sensing circuit layer, wherein the upper substrate comprises a first surface that faces away from the OLED display layer and a second surface that faces the OLED display layer, and wherein the first sensing circuit layer is disposed on the first surface and the second sensing circuit layer is disposed above the OLED display layer.

5. The touch display device as claimed in claim 1, wherein the first sensing circuit layer and the second sensing circuit layer are spaced apart by a distance of more than 2 μ

m.

6. The touch display device as claimed in claim 1, wherein the first direction and the second direction are different directions.

7. The touch display device as claimed in claim 1, wherein the OLED display layer comprises:

an active element array disposed on the lower substrate; and

an organic light-emitting layer disposed on the active element array, wherein the organic light-emitting layer comprises the counter electrode, a pixel electrode and an intermediate layer.

8. A touch display device, comprising:

an OLED display layer disposed on a lower substrate and comprising a counter electrode;

a protection layer disposed on the OLED display layer and in direct contact with the counter electrode;

an upper substrate, wherein the protection layer is disposed between the lower substrate and the upper substrate;

a first sensing circuit layer disposed on a surface of the upper substrate that faces away from the protection layer; and

a second sensing circuit layer in direct contact with the protection layer, wherein the first sensing circuit layer and the second sensing circuit layer are spaced apart by an air layer and the upper substrate, wherein the protection layer electrically insulates the second sensing circuit layer from the counter electrode, and wherein each of the protection layer and the second sensing circuit layer extends in a single plane.

9. The touch display device as claimed in claim 8, wherein the air layer between the first sensing circuit layer and the second sensing circuit layer has a thickness ranging from 5 μ

m to 100 μ

m.

10. The touch display device as claimed in claim 8, further comprising a sealing glue layer formed between the upper substrate and the lower substrate, wherein the OLED display layer is encapsulated inside a space formed by the upper substrate, the lower substrate and the sealing glue layer, and wherein the first sensing circuit layer is outside the space formed by the upper substrate, the lower substrate and the sealing glue layer.

11. The touch display device as claimed in claim 8, wherein the first sensing circuit layer is a first pattern conducting layer comprising a plurality of first touch electrode serials extending in a first direction, wherein each of the plurality of first touch electrode serials comprises a plurality of electrically connected first touch electrodes, wherein the second sensing circuit layer is a second pattern conducting layer comprising a plurality of second touch electrode serials extending in a second direction, wherein each of the plurality of the second touch electrode serials comprises a plurality of electrically connected second touch electrodes, and wherein the first direction and the second direction are different directions.

12. A touch display device, comprising:

a lower substrate;

an OLED display layer disposed on the lower substrate and comprising a counter electrode;

an upper substrate opposite the OLED display layer relative to the lower substrate;

an air layer formed between the upper substrate and the lower substrate;

a sealing glue layer formed between the upper substrate and the lower substrate;

a capacitive touch module disposed above the OLED display layer, wherein the capacitive touch module comprises;

a first sensing circuit layer disposed outside a space formed by the upper substrate, the lower substrate and the sealing glue layer, wherein the first sensing circuit layer is a first pattern conducting layer comprising a plurality of first touch electrode serials extending in a first direction, and wherein each of the plurality of first touch electrode serials comprises a plurality of electrically connected first touch electrodes; and

a second sensing circuit layer disposed inside the space formed by the upper substrate, the lower substrate and the sealing glue layer, wherein the second sensing circuit layer is a second pattern conducting layer comprising a plurality of second touch electrode serials extending in a second direction, and wherein each of the plurality of the second touch electrode serials comprises a plurality of electrically connected second touch electrodes; and

a protection layer disposed on the OLED display layer and in direct contact with the counter electrode, wherein the second sensing circuit layer is in direct contact with the protection layer, and wherein each of the protection layer and the second sensing circuit layer extends in a single plane.

13. The touch display device as claimed in claim 12, wherein the air layer and the upper substrate are between the first sensing circuit layer and the second sensing circuit layer, wherein the upper substrate comprises a first surface that faces away from the OLED display layer and a second surface that faces the OLED display layer, and wherein the first sensing circuit layer is disposed on the first surface and the second sensing circuit layer is disposed above the OLED display layer.

14. The touch display device as claimed in claim 13, wherein the protection layer electrically insulates the second sensing circuit layer from the counter electrode.

15. The touch display device as claimed in claim 12, wherein the OLED display layer is encapsulated inside the space formed by the upper substrate, the lower substrate and the sealing glue layer.

16. The touch display device as claimed in claim 12, wherein the first direction and the second direction are different directions.

17. The touch display device as claimed in claim 12, wherein the first sensing circuit layer and the second sensing circuit layer are spaced apart by a distance of more than 2 μ

m.