Touch display device

• US 9,665,225 B2
• Filed: 06/17/2015
• Issued: 05/30/2017
• Est. Priority Date: 06/19/2014
• 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: Hsu, I-Chung, Hsu, Kuo-Shu, Lu, Fenghua, Xu, Chenghong
• Primary Examiner(s): Moon, Seokyun
• Application Number:
  US14/742,698
• Publication Number:
  US 20150370382A1
• Time in Patent Office: 713 Days
• Field of Search: None
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• 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 3/0445 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

Abstract

A touch display device comprises a display module, a polarizer, a first patterned electrode layer and a first transparent adhesive layer. The first patterned electrode layer is disposed between the polarizer and the display module and includes a patterned portion and a non-patterned portion. The first transparent adhesive layer is disposed on the first patterned electrode layer. The refractive index of the first transparent adhesive layer is greater than or equal to 1.65 and less than or equal to 1.72, wherein reflectivity of the patterned portion is substantially the same as reflectivity of the non-patterned portion.

Claims

1. A touch display device, comprising:

a display module;

a polarizer;

a first patterned electrode layer disposed between the polarizer and the display module and including a patterned portion and a non-patterned portion; and

a first transparent adhesive layer disposed on the first patterned electrode layer, wherein the refractive index of the first transparent adhesive layer is greater than or equal to 1.65 and less than or equal to 1.72;

wherein the first transparent adhesive layer is disposed between the polarizer and the first patterned electrode layer, wherein the first transparent adhesive layer has a first surface and a second surface which are disposed oppositely, the first surface faces the polarizer and the second surface faces the first patterned electrode layer, the refractive index of the second surface is greater than that of the first surface, and the stickiness of the first surface is greater than that of the second surface;

wherein reflectivity of the patterned portion is substantially the same as reflectivity of the non-patterned portion.

2. The touch display device of claim 1, further comprising:

a refractive-index matching layer disposed between the display module and the first patterned electrode layer.

3. The touch display device of claim 1, wherein at least a covering layer is disposed on the polarizer and in a peripheral region of the polarizer.

4. The touch display device of claim 1, further comprising:

a protection substrate disposed on the side of the polarizer away from the display module.

5. The touch display device of claim 4, wherein a second transparent adhesive layer is disposed between the protection substrate and the polarizer.

6. The touch display device of claim 5, wherein the second transparent adhesive layer has a third surface and a fourth surface which are disposed oppositely, the third surface faces the protection substrate and the fourth surface faces the polarizer, the refractive index of the fourth surface is greater than that of the third surface, and the stickiness of the third surface is greater than that of the fourth surface.

7. The touch display device of claim 4, wherein at least a covering layer is disposed on the protection substrate and in a peripheral region of the protection substrate.

8. The touch display device of claim 1, wherein the thickness of the first transparent adhesive layer is in a range between 150 μ

m and 200 μ

m.

9. The touch display device of claim 4, further comprising:

a second patterned electrode layer disposed on the polarizer and between the protection substrate and the polarizer, and crossing the first patterned electrode layer.

10. A touch display device, comprising:

a display module;

a polarizer;

a first patterned electrode layer disposed between the polarizer and the display module and including a patterned portion and a non-patterned portion;

a first transparent adhesive layer disposed on the first patterned electrode layer, wherein the refractive index of the first transparent adhesive layer is greater than or equal to 1.65 and less than or equal to 1.72; and

a protection substrate disposed on the side of the polarizer away from the display module;

a second transparent adhesive layer disposed between the protection substrate and the polarizer, wherein the second transparent adhesive layer has a third surface and a fourth surface which are disposed oppositely, the third surface faces the protection substrate and the fourth surface faces the polarizer, the refractive index of the fourth surface is greater than that of the third surface, and the stickiness of the third surface is greater than that of the fourth surface;

wherein reflectivity of the patterned portion is substantially the same as reflectivity of the non-patterned portion.

11. The touch display device of claim 10, wherein the first transparent adhesive layer is disposed between the first patterned electrode layer and the display module.

12. The touch display device of claim 11, wherein the first transparent adhesive layer has a first surface and a second surface which are disposed oppositely, the first surface faces the first patterned electrode layer and the second surface faces the display module, the refractive index of the first surface is greater than that of the second surface, and the stickiness of the second surface is greater than that of the first surface.

13. The touch display device of claim 11, further comprising:

a refractive-index matching layer disposed between the polarizer and the first patterned electrode layer.

14. The touch display device of claim 10, wherein the first transparent adhesive layer is disposed between the polarizer and the first patterned electrode layer.

15. The touch display device of claim 14, wherein the first transparent adhesive layer has a first surface and a second surface which are disposed oppositely, the first surface faces the polarizer and the second surface faces the first patterned electrode layer, the refractive index of the second surface is greater than that of the first surface, and the stickiness of the first surface is greater than that of the second surface.

16. The touch display device of claim 14, further comprising:

a refractive-index matching layer disposed between the display module and the first patterned electrode layer.

17. The touch display device of claim 10, wherein at least a covering layer is disposed on the polarizer and in a peripheral region of the polarizer.

18. The touch display device of claim 10, wherein at least a covering layer is disposed on the protection substrate and in a peripheral region of the protection substrate.

19. The touch display device of claim 10, wherein the thickness of the first transparent adhesive layer is in a range between 150 μ

m and 200 μ

m.

20. The touch display device of claim 10, further comprising:

a second patterned electrode layer disposed on the polarizer and between the protection substrate and the polarizer, and crossing the first patterned electrode layer.