TOUCH DISPLAY AND METHOD FOR MANUFACTURING THE SAME

• US 20150070605A1
• Filed: 09/10/2014
• Published: 03/12/2015
• Est. Priority Date: 09/10/2013
• 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, Lin, Hsi-Chien, Kung, Li-Wei, Shao, Hong-Siang
• Granted Patent: US 9,535,524 B2
• Time in Patent Office: Days
• US Class Current: 349/12
• CPC Class Codes: G02B 27/286 for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another G02B5/3083 takes precedence; light guide coupling means utilising polarising elements G02B6/34
• 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 is disclosed including a display module, a polarizer disposed on the display module, and a plurality of touch electrodes at least partly coated on the polarizer, wherein the touch electrodes are formed by nano-silver. Since the touch electrodes formed by nano-silver is employed in the display, a multifunctional touch display is provided. A method for making the touch display is also disclosed.

Claims

1. A touch display, comprising:

a display module;

a polarizer disposed on the display module; and

a plurality of nano-silver touch electrodes totally or partially integrated with the polarizer.

2. The touch display according to claim 1, wherein the polarizer comprises a first protective layer, a polarizer substrate, and a second protective layer, the polarizer substrate is sandwiched between the first protective layer and the second protective layer.

3. The touch display according to claim 2, wherein the plurality of nano-silver touch electrodes comprises a plurality of first touch electrodes paralleled arranged along a first direction and a plurality of second touch electrodes paralleled arranged along a second direction;

the plurality of first touch electrodes are disposed on the first protective layer;

the plurality of second touch electrodes are disposed on the second protective layer;

the plurality of first touch electrodes and the plurality of second touch electrodes are electrically insulated from each other via the polarizer substrate;

the first direction is unparallel to the second direction.

4. The touch display according to claim 2, wherein the plurality of nano-silver touch electrodes comprises a plurality of first touch electrodes paralleled arranged along a first direction and a plurality of second touch electrodes paralleled arranged along a second direction;

the plurality of first touch electrodes are disposed on one side of the first protective layer;

the plurality of second touch electrodes are disposed on the other side of the first protective layer;

the plurality of first touch electrodes and the plurality of second touch electrodes are electrically insulated from each other via the first protective layer;

the first direction is unparallel to the second direction.

5. The touch display according to claim 2, wherein the plurality of nano-silver touch electrodes comprises a plurality of first touch electrodes paralleled arranged along a first direction and a plurality of second touch electrodes paralleled arranged along a second direction;

the plurality of first touch electrodes are disposed on one surface of the second protective layer;

the plurality of second touch electrodes are disposed on the other surface of the second protective layer;

the plurality of first touch electrodes and the plurality of second touch electrodes are electrically insulated from each other via the second protective layer;

the first direction is unparallel to the second direction.

6. The touch display according to claim 2, wherein the plurality of nano-silver touch electrodes comprises a plurality of first touch electrodes paralleled arranged along a first direction and a plurality of second touch electrodes paralleled arranged along a second direction;

the touch display further comprises an optical film disposed between the display module and the polarizer;

the plurality of first touch electrodes are disposed on the optical film;

the plurality of second touch electrodes are disposed on the first protective layer or the second protective layer;

the plurality of first touch electrodes and the plurality of second touch electrodes are electrically insulated from each other via the first protective layer;

the first direction is unparallel to the second direction.

7. The touch display according to claim 2, wherein the plurality of nano-silver touch electrodes comprises a plurality of first touch electrodes paralleled arranged along a first direction and a plurality of second touch electrodes paralleled arranged along a second direction;

the plurality of first touch electrodes and the plurality of second touch electrodes are electrically insulated from each other and are disposed on the same side of the first protective layer or the second protective layer;

the first direction is unparallel to the second direction.

8. The touch display according to claim 7, further comprising an insulating layer disposed between the plurality of first touch electrodes and the plurality of second touch electrodes, the insulating layer electrically insulating the plurality of first touch electrodes and the plurality of second touch electrodes.

9. The touch display according to claim 7, wherein the plurality of first touch electrodes and the plurality of second touch electrodes are cross-arranged;

the touch display further comprises a plurality of isolating pads, each of the plurality of isolating pads is disposed at an intersection of the cross-arranged first touch electrodes and second touch electrodes, such that the plurality of first touch electrodes and the plurality of second touch electrodes are electrically insulated from each other via the plurality of isolating pads.

10. The touch display according to claim 1, further comprising a protective film covering the plurality of nano-silver touch electrodes.

11. The touch display according to claim 10, wherein the protective film is made of organic transparent materials and has a thickness of between about 80 nm to about 120 nm.

12. The touch display according to claim 6, wherein the optical film is selected from the group consisting of color filter, optical compensation film, phase compensation plate, transreflective film, optical haze film, antireflection film.

13. The touch display according to claim 1, further comprising a cover plate disposed on the polarizer.

14. A method for manufacturing a touch display, comprising the following steps:

integrating total or partial plurality of nano-silver touch electrodes to a polarizer to form a touch polarizer; and

attaching the touch polarizer to a display module.

15. The method according to claim 14, further comprising attaching a cover plate to the touch polarizer.

16. The method according to claim 14, wherein the plurality of nano-silver touch electrodes are manufactured according the following steps:

adding nano-silver to a solvent to form a nano-silver conductive compound;

forming a nano-silver conductive film by wet coating the nano-silver conductive compound;

curing the nano-silver conductive film; and

etching the nano-silver conductive film to form the plurality of nano-silver touch electrodes.

17. The method according to claim 14, wherein the polarizer comprises a first protective layer, a polarizer substrate, and a second protective layer, the polarizer substrate is sandwiched between the first protective layer and the second protective layer.

18. The method according to claim 17, wherein the plurality of nano-silver touch electrodes comprises a plurality of first touch electrodes paralleled arranged along a first direction and a plurality of second touch electrodes paralleled arranged along a second direction;

the first direction is unparallel to the second direction;

wherein the step of integration comprises;

forming the first protective layer;

forming the plurality of first touch electrodes on the first protective layer;

forming the second protective layer;

forming the plurality of second touch electrodes on the second protective layer;

forming the polarizer substrate; and

attaching the first protecting layer with the plurality of first touch electrodes, the polarizer substrate, and the second protecting layer with the plurality of second touch electrodes, the plurality of first touch electrodes and the plurality of second touch electrodes are electrically insulated from each other via the polarizer substrate.

19. The method according to claim 17, wherein the plurality of nano-silver touch electrodes comprises a plurality of first touch electrodes paralleled arranged along a first direction and a plurality of second touch electrodes paralleled arranged along a second direction;

the first direction is unparallel to the second direction;

wherein the step of integration comprises;

forming the plurality of first touch electrodes on one side of the first protective layer; and

forming the plurality of second touch electrodes on the other side of the first protective layer, the plurality of first touch electrodes and the plurality of second touch electrodes are electrically insulated from each other via the first protective layer.

20. The method according to claim 17, wherein the plurality of nano-silver touch electrodes comprises a plurality of first touch electrodes paralleled arranged along a first direction and a plurality of second touch electrodes paralleled arranged along a second direction;

the first direction is unparallel to the second direction;

wherein the step of integration comprises;

forming the plurality of first touch electrodes on one side of the second protective layer; and

forming the plurality of second touch electrodes on the other side of the second protective layer, the plurality of first touch electrodes and the plurality of second touch electrodes are electrically insulated from each other via the second protective layer.

21. The method according to claim 17, wherein the plurality of nano-silver touch electrodes comprises a plurality of first touch electrodes paralleled arranged along a first direction and a plurality of second touch electrodes paralleled arranged along a second direction;

the first direction is unparallel to the second direction;

the touch display further comprises an optical film disposed between the display module and the polarizer;

wherein the step of integration comprises;

forming the plurality of first touch electrodes on the optical film;

forming the plurality of second touch electrodes on the first protective layer, and attaching the optical film with the plurality of first touch electrodes to the first protective layer with the plurality of second touch electrodes, the plurality of first touch electrodes and the plurality of second touch electrodes are electrically insulated from each other via the first protective layer.

22. The method according to claim 17, wherein the plurality of nano-silver touch electrodes comprises a plurality of first touch electrodes paralleled arranged along a first direction and a plurality of second touch electrodes paralleled arranged along a second direction;

the first direction is unparallel to the second direction;

the touch display further comprises an optical film disposed between the display module and the polarizer;

wherein the step of integration comprises;

forming the plurality of first touch electrodes on the optical film;

forming the plurality of second touch electrodes on the second protective layer, and

attaching the optical film with the plurality of first touch electrodes, the first protective layer, the polarizer substrate, and the second protective layer with the plurality of second touch electrodes, the plurality of first touch electrodes and the plurality of second touch electrodes are electrically insulated from each other via the first protective layer and/or the polarizer substrate.

23. The method according to claim 17, wherein the plurality of nano-silver touch electrodes comprises a plurality of first touch electrodes paralleled arranged along a first direction and a plurality of second touch electrodes paralleled arranged along a second direction;

the first direction is unparallel to the second direction;

wherein the step of integration comprises;

forming the first protective layer; and

forming the plurality of first touch electrodes and the plurality of second touch electrodes on the first protective layer, wherein the plurality of first touch electrodes and the plurality of second touch electrodes are electrically insulated from each other.

24. The method according to claim 17, wherein the plurality of nano-silver touch electrodes comprises a plurality of first touch electrodes paralleled arranged along a first direction and a plurality of second touch electrodes paralleled arranged along a second direction;

the first direction is unparallel to the second direction;

wherein the step of integration comprises;

forming the second protective layer; and

forming the plurality of first touch electrodes and the plurality of second touch electrodes on the second protective layer, wherein the plurality of first touch electrodes and the plurality of second touch electrodes are electrically insulated from each other.