TOUCH SCREEN AND MANUFACTURING METHOD

• US 20110074729A1
• Filed: 09/28/2010
• Published: 03/31/2011
• Est. Priority Date: 09/30/2009
• Status: Active Grant

• Current Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.)
• Inventors: IM, YUN SIK, YU, Yao
• Granted Patent: US 8,619,203 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells
• 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 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
• CPC Class Codes: Y10T 29/49126 Assembling bases

Abstract

A touch screen comprises a first substrate, a second substrate and a third substrate sequentially stacked. A first sensing layer is provided on a first surface of the second substrate opposing to the third substrate, and a second sensing layer is provided on a surface of the third substrate opposing to the second substrate. The second substrate provided with the first sensing layer and the third substrate provided with the second sensing layer constitute a touch unit for sensing a touch signal, and the second substrate and the first substrate constitute a display unit for displaying.

Claims

1. A touch screen comprising:

a first substrate, a second substrate and a third substrate sequentially stacked,

wherein a first sensing layer is provided on a first surface of the second substrate opposing to the third substrate, a second sensing layer is provided on a surface of the third substrate opposing to the second substrate, and

wherein the second substrate provided with the first sensing layer and the third substrate provided with the second sensing layer constitute a touch unit for sensing a touch signal, and the second substrate and the first substrate constitute a display unit for displaying.

2. The touch screen according to claim 1, wherein the touch unit is a capacitive type touch unit, and the first sensing layer and the second sensing layer are a capacitive type sensing layer.

3. The touch screen according to claim 2, wherein a touch electrode is provided on at least one of the capacitive type sensing layers.

4. The touch screen according to claim 2, wherein an insulating layer is provided between the first sensing layer and the second sensing layer to separate the first sensing layer and the second sensing layer away.

5. The touch screen according to claim 1, wherein the touch unit is a resistance type touch unit, and the first sensing layer and the second sensing layer are resistance type sensing layers.

6. The touch screen according to claim 5, wherein a touch electrode for transferring the touch signal, a voltage application wire connected with the touch electrode, and conductive adhesive strips connected with the voltage application wire are provided on at least one of the first sensing layer and the second sensing layer, and the conductive adhesive strips are respectively attached on two opposing edges of the resistance type sensing layer.

7. The touch screen according to claim 6, wherein the touch electrode comprises a first touch electrode provided in the first sensing layer, and a second touch electrode is provided in the second sensing layer.

8. The touch screen according to claim 7, wherein a substrate touch electrode connected with an external controlling circuit through a flexible printed circuit is provided on the first substrate, the substrate touch electrode is provided to oppose to the second touch electrode, both the substrate touch electrode and the second touch electrode are provided within a width range of sealant for sealing the first substrate and the second substrate, and the substrate touch electrode is electrically connected with the second touch electrode through the sealant for sealing the first substrate and the second substrate.

9. The touch screen according to claim 5, wherein an insulating layer or insulating particles are provided between the first sensing layer and the second sensing layer to separate the first sensing layer and the second sensing layer away.

10. The touch screen according to claim 1, wherein the first substrate is an array substrate, and the display unit constituted by the first substrate and the second substrate is a liquid crystal display unit.

11. The touch screen according to claim 1, wherein a color filter structure is provided on a second surface of the second substrate opposing to the first substrate.

12. The touch screen according to claim 11, wherein the first substrate is an array substrate, and the display unit constituted by the first substrate and the second substrate is a liquid crystal display unit.

13. A method of manufacturing a touch screen comprising:

preparing a first substrate, a second substrate and a third substrate, respectively, providing a first sensing layer on a first surface of the second substrate, and providing a second sensing layer on the third substrate; and

sequentially stacking and assembling the first substrate, the second substrate and the third substrate so that the second substrate provided with the first sensing layer and the third substrate provided with the second sensing layer constitute a touch unit for sensing a touch signal, and the second substrate and the first substrate constitute a display unit for displaying.

14. The method of manufacturing the touch screen according to claim 13,

wherein in forming the second substrate and the third substrate, the first sensing layer is formed on a first surface of a base substrate for forming the second substrate, the second sensing layer is formed on another base substrate for forming the third substrate, and

wherein the first sensing layer and the second sensing layer are capacitive type sensing layers, and the touch unit constituted by the first sensing layer and the second sensing layer is a capacitive type touch unit.

15. The method of manufacturing the touch screen according to claim 13,

wherein in forming the second substrate and the third substrate, the first sensing layer is formed on a first surface of a base substrate for forming the second substrate, the second sensing layer is formed on another base substrate for forming the third substrate, and

wherein the first sensing layer and the second sensing layer are resistance type sensing layers, and the touch unit constituted by the first sensing layer and the second sensing layer is a resistance type touch unit.

16. The method of manufacturing the touch screen according to claim 15, wherein in forming the second substrate and the third substrate, a transparent conductive layer is coated on at least one of the first sensing layer and the second sensing layer and patterned to form a touch electrode for transferring the touch signal and a voltage application wire connected with the touch electrode;

and

wherein conductive adhesive strips are respectively provided on two opposing edges of the at least one of the first sensing layer and the second sensing layer, and the conductive adhesive strip are connected with the voltage application wire.

17. The method of manufacturing the touch screen according to claim 16,

wherein the touch electrode comprises a first touch electrode provided in the first sensing layer and a second touch electrode provided in the second sensing layer;

and

wherein, in forming the first substrate, a substrate touch electrode connected with an external controlling circuit is provided on the first substrate, the substrate touch electrode is provided to oppose to the second touch electrode, and both the substrate touch electrode and the second touch electrode are provided within a width range of sealant for sealing the first substrate and the second substrate.

18. The method of manufacturing the touch screen according to claim 17, wherein in assembling the first substrate, the second substrate and the third substrate, the first substrate and the second substrate are sealed by the sealant, the first touch electrode is electrically connected with the second touch electrode through conductive adhesive, and the second touch electrode is electrically connected with the substrate touch electrode through the sealant.

19. The method of manufacturing the touch screen according to claim 13, wherein a color filter structure is provided on a second surface of the second substrate opposing to the first substrate.

20. The method of manufacturing the touch screen according to claim 19, wherein the first substrate is an array substrate, the display unit constituted by the first substrate and the second substrate is a liquid crystal display unit.