TOUCH DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF

• US 20130026501A1
• Filed: 03/13/2012
• Published: 01/31/2013
• 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
• Granted Patent: US 9,647,040 B2
• Time in Patent Office: Days
• US Class Current: 257/88
• 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 um. 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;

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 um.

2. The touch display device as claimed in claim 1, wherein the air layer is between the first sensing circuit layer and the second sensing circuit layer, and the upper substrate comprises a first surface away from the OLED display layer, and a second surface on which the first sensing circuit layer is disposed, wherein the second surface is, close to the OLED display layer, further wherein the second sensing circuit layer is disposed above the OLED display layer.

3. The touch display device as claimed in claim 2 wherein the touch display device further comprises a protection layer, wherein the protection layer covers the OLED display layer and the second sensing circuit layer is disposed on the protection layer.

4. The touch display device as claimed in claim 2, wherein the first sensing circuit layer and the second sensing circuit layer are disposed opposite to each other and thickness of the air layer between them ranges from 5 um to 100 um.

5. The touch display device as claimed in claim 1, wherein the touch display device further comprises a sealing glue layer formed between the upper substrate and the lower substrate, wherein the OLED display layer and the touch module are encapsulated inside the space formed by the upper substrate, the lower substrate and the sealing glue layer.

6. 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 on which the first sensing circuit layer is disposed away from the OLED display layer, and a second surface, close to the OLED display layer, wherein the second sensing circuit layer is disposed above the OLED display layer.

7. The touch display device as claimed in claim 6, wherein the touch display device further comprises a protection layer, wherein the protection layer covers the OLED display layer, and the second sensing circuit layer is disposed on the protection layer.

8. The touch display device as claimed in claim 6, wherein the touch display device further comprises a sealing glue layer formed between the upper substrate and the lower substrate, wherein the OLED display layer and the second sensing circuit layer are encapsulated inside the space formed by the upper substrate, the lower substrate and the sealing glue layer.

9. The touch display device as claimed in claim 1, wherein the upper substrate is between the first sensing circuit layer and the second sensing circuit layer, wherein the upper substrate comprises a first surface and a second surface, further wherein the first sensing circuit layer is disposed on the second surface and the second sensing circuit layer is disposed on the first surface.

10. The touch display device as claimed in claim 1, wherein the first sensing circuit layer is a first pattern conducting layer comprising a plurality of first touch electrode serials extended along a first direction, each of first touch electrode serials comprising a plurality of electrically connected first touch electrodes, further wherein the second sensing circuit layer is a second pattern conducting layer comprising a plurality of second touch electrode serials extended along a second direction, each of the second touch electrode serials comprising a plurality of electrically connected second touch electrodes;

further wherein the first direction and the second direction are different.

11. 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 an counter electrode, a pixel electrode and an intermediate layer.

12. A manufacturing method for a touch display device, comprising:

disposing an OLED display layer on a lower substrate, wherein the lower substrate is configured opposite to an upper substrate with an air layer between the upper substrate and the lower substrate; and

forming a touch module 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 um.

13. The manufacturing method for the touch display device as claimed in claim 12, wherein the air layer is between the first sensing circuit layer and the second sensing circuit layer, and the upper substrate comprises a first surface away from the OLED display layer and a second surface, on which the first sensing circuit layer is disposed, wherein the second surface is close to the OLED display layer, further wherein the second sensing circuit layer is disposed above the OLED display layer.

14. The manufacturing method for the touch display device as claimed in claim 13, wherein the touch display device further comprises a protection layer for covering the OLED display layer, further wherein the second sensing circuit layer is disposed on the protection layer.

15. The manufacturing method for the touch display device as claimed in claim 13, wherein the first sensing circuit layer and the second sensing circuit layer are disposed opposite to each other and thickness of the air layer between them ranges from 5 um to 100 um.

16. The manufacturing method for the touch display device as claimed in claim 13, wherein the touch display device further comprises forming a sealing glue layer to glue the upper substrate and the lower substrate together, wherein the OLED display layer and the touch module are encapsulated inside the space formed by the upper substrate, the lower substrate and the sealing glue layer.

17. The manufacturing method for 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, on which the first sensing circuit layer is disposed away from the OLED display layer, and a second surface close to the OLED display layer, wherein the second sensing circuit layer is disposed above the OLED display layer.

18. The manufacturing method for the touch display device as claimed in claim 17, wherein the touch display device further comprises a protection layer covering the OLED display layer, wherein the second sensing circuit layer is disposed on the protection layer.

19. The manufacturing method for the touch display device as claimed in claim 17, wherein the touch display device further comprises forming a sealing glue layer to glue the upper substrate and the lower substrate together, wherein the OLED display layer and the second sensing circuit layer are encapsulated inside the space formed by the upper substrate, the lower substrate and the sealing glue layer.

20. The manufacturing method for the touch display device as claimed in claim 12, wherein the upper substrate is between the first sensing circuit layer and the second sensing circuit layer, wherein the upper substrate comprises a first surface and a second surface, further wherein the first sensing circuit layer is disposed on the second surface and the second sensing circuit layer is disposed on the first surface.