TOUCH LIQUID CRYSTAL GRATING, MANUFACTURING METHOD THEREOF AND TOUCH 3D DISPLAY DEVICE

• US 20140211104A1
• Filed: 12/17/2013
• Published: 07/31/2014
• Est. Priority Date: 01/29/2013
• Status: Active Grant

• Current Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.)
• Original Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.)
• Inventors: YANG, SHENGJI
• Granted Patent: US 9,261,993 B2
• Time in Patent Office: Days
• US Class Current: 349/12
• CPC Class Codes: G02B 30/27 involving lenticular arrays
• CPC Class Codes: G02B 30/31 involving active parallax barriers involving directional light or back-light sources G02B30/33
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• 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: Y10T 29/49117 Conductor or circuit manufacturing

Abstract

Embodiments of the present invention provide a touch liquid crystal grating, a manufacturing method thereof and a touch 3D display device, the touch liquid crystal grating comprising: a first substrate and a second substrate; a liquid crystal layer; first electrodes, disposed on a side of the first substrate facing the liquid crystal layer; an insulating layer, covering the first electrodes; second electrodes, disposed on a side of the insulating layer facing the liquid crystal layer, a spacing region being between adjacent two second electrodes; second touch electrodes, disposed in the same layer with the second electrodes, each being located in one spacing region; first touch electrodes, wherein when being powered on, the first and second touch electrodes function to realize a touch function; liquid crystal molecules under the second electrodes rotate, and liquid crystal molecules under the second touch electrodes do not rotate, forming the liquid crystal grating.

Claims

1. A touch liquid crystal grating, comprising:

a first substrate;

a second substrate, cell-assembled with the first substrate;

a liquid crystal layer, filled between the first substrate and the second substrate;

a plurality of first electrodes, disposed on a side of the first substrate facing the liquid crystal layer parallel to and spaced apart from each other;

an insulating layer, covering the plurality of first electrodes;

a plurality of second electrodes, disposed on a side of the insulating layer facing the liquid crystal layer spaced apart from each other and extending parallel to the plurality of first electrodes, a spacing region being between adjacent two second electrodes;

a plurality of second touch electrodes, parallel to each other and disposed in the same layer with the plurality of second electrodes, each of the second touch electrodes being located in one spacing region;

a plurality of first touch electrodes, disposed parallel to each other on a side of the first substrate opposite to the liquid crystal layer,

wherein when the touch liquid crystal grating is powered on, the first touch electrodes and the second touch electrodes function to realize a touch function;

liquid crystal molecules in regions under the plurality of second electrodes rotate, and liquid crystal molecules in regions under the plurality of second touch electrodes do not rotate, forming the liquid crystal grating.

2. The touch liquid crystal grating according to claim 1, wherein each of the second electrodes directly corresponds to each of the first electrodes and both have an equal width.

3. The touch liquid crystal grating according to claim 2, wherein each of the second electrodes comprises at least two strip-shaped sub-electrodes.

4. The touch liquid crystal grating according to claim 3, wherein the plurality of first touch electrodes are strip-shaped electrodes and perpendicular to the plurality of second touch electrodes in a different plane, and the second electrodes, the second touch electrodes and the first electrodes are parallel to each other.

5. The touch liquid crystal grating according to claim 1, wherein a width of each of the second electrodes is a half of a unit pixel width, and the width of each of the second electrodes equals to a width of the spacing region between two adjacent second electrodes.

6. The touch liquid crystal grating according to claim 1, wherein each of the second touch electrodes comprises at least two second touch sub-electrodes parallel to each other and either ends of all second touch sub-electrodes of each of the second touch electrode are connected by a metal wire.

7. The touch liquid crystal grating according to claim 1, further comprising:

a planarization layer, covering the plurality of first touch electrodes; and

a third polarizer, disposed on a side of the planarization layer opposite to the liquid crystal layer.

8. The touch liquid crystal grating according to claim 3, wherein the plurality of second electrodes are connected together and the strip-shaped sub-electrodes of each of the second electrodes are electrically connected together.

9. The touch liquid crystal grating according to claim 1, wherein a width of each of the first touch electrodes is 5 mm˜

6 mm.

10. The touch liquid crystal grating according to claim 1, wherein a width of each of the second electrodes is not equal to a width of the spacing region between any two adjacent second electrodes.

11. The touch liquid crystal grating according to claim 1, wherein the first electrode is grounded when the touch liquid crystal grating is powered on.

12. A touch 3D display device, comprises:

a display panel; and

a touch liquid crystal grating according to claim 1, disposed on a light exiting side of the display panel.

13. The touch 3D display device according to claim 12, wherein the display panel is a liquid crystal display panel including an array substrate and an opposite substrate cell-assembled to form a liquid crystal cell and liquid crystal material filled in the liquid crystal cell, and

wherein the touch liquid crystal grating further comprises:

a planarization layer, covering the plurality of first touch electrodes; and

a third polarizer, disposed on a side of the planarization layer opposite to the liquid crystal layer, a direction of a transmission axis of the second polarizer disposed on a side of the opposite substrate opposite to the liquid crystal material is parallel to that of a transmission axis of the third polarizer of the touch liquid crystal grating.

14. The touch 3D display device according to claim 12, wherein the display panel is an organic electroluminescence display panel, a plasma display panel or an electronic paper,

wherein the touch liquid crystal grating further comprises:

a planarization layer, covering the plurality of first touch electrodes; and

a third polarizer, disposed on a side of the planarization layer opposite to the liquid crystal layer,

and the touch liquid crystal grating further comprises a first polarizer on a side of the second substrate opposite to the liquid crystal layer, a direction of a transmission axis of the first polarizer is parallel to that of a transmission axis of the third polarizer.

15. A manufacturing method for a touch liquid crystal grating, comprising:

preparing a first substrate and a second substrate;

forming a plurality of first electrodes parallel to each other on a side of the first substrate;

forming an insulating layer on the first electrodes and forming through holes in the insulating layer;

manufacturing a plurality of second electrodes parallel to each other and a plurality of second touch electrodes parallel to each other in the same layer on the insulating layer;

manufacturing a plurality of first touch electrodes parallel to each other and perpendicular to the plurality of second touch electrodes in different planes on another side of the first substrate; and

cell-assembling the first substrate and the second substrate and injecting a liquid crystal layer between the first substrate and the second substrate,

wherein each of the second touch electrodes is located in a spacing region between two adjacent second electrodes.

16. The manufacturing method according to claim 15, wherein the forming a plurality of first electrodes parallel to each other on a side of the first substrate comprises:

manufacturing a first metal wire, a second metal wire and a third metal wire on a side of the first substrate, and then forming the plurality of first electrodes on the first metal wire to make one end of each of the plurality of first electrodes directly connected with the first metal wire, the plurality of first electrodes, the second metal wire and the third metal wire being insulated with each other.

17. The method according to claim 16, wherein the forming through holes in the insulating layer comprises:

forming a plurality of first through holes and a plurality of second through holes by a patterning process at locations in the insulating layer corresponding to the second metal wire, the third metal wire to allow the plurality of second electrodes connected with the second metal wire through the plurality of first through holes, and the plurality of second touch electrodes connected with the third metal wire through the plurality of second through holes.

18. The method according to claim 15, wherein the forming a plurality of first touch electrodes parallel to each other on another side of the first substrate includes:

manufacturing a fourth metal wire on the another side of the first substrate and forming the plurality of first touch electrodes on the fourth metal wire to allow the plurality of first touch electrodes connected directly with the fourth metal wire.

19. The method according to claim 15, wherein each of the second electrodes has a width of half of a unit pixel width and each of the second electrodes comprises at least two second sub-electrodes.

20. The method according to claim 15, wherein each of the second touch electrodes comprises at least two second touch sub-electrodes parallel to each other and either ends of all second touch sub-electrodes of each of the second touch electrode are connected by a metal wire.