IN-CELL TOUCH DISPLAY PANEL AND TOUCH DISPLAY SYSTEM

• US 20170097734A1
• Filed: 10/23/2015
• Published: 04/06/2017
• Est. Priority Date: 05/25/2015
• 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.), BOE Technology Group Co., Ltd.
• Inventors: YANG, Ming, DONG, Xue, CHEN, Xiaochuan, WANG, Qian, LIU, Peng, LU, Pengcheng, LIU, Yingming, WANG, Lei
• Granted Patent: US 10,599,263 B2
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/134345 Subdivided pixels, e.g. for grey scale or redundancy
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/042 by opto-electronic means
• CPC Class Codes: G06F 3/0421 by interrupting or reflecting a light beam, e.g. optical touch-screen
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires

Abstract

An in-cell touch display panel includes a display area. The display area includes a plurality of touch zones arranged in an array, one or more touch scanning lines corresponding to a respective row of the touch zones, and touch reading lines that have a one-to-one correspondence with the touch zones. Each of the touch zones includes at least one touch module, each touch module includes a photosensitive unit and a touch reading unit, an output end of the photosensitive unit is connected to an input end of the touch reading unit, a control end of the touch reading unit is connected to a corresponding touch scanning line, and an output end of the touch reading unit is connected to a corresponding touch reading line.

Claims

1. An in-cell touch display panel comprising a display area, the display area comprising a plurality of touch zones arranged in an array, one or more touch scanning lines corresponding to a respective row of the touch zones, and touch reading lines that have a one-to-one correspondence with the touch zones;

wherein;

each of the touch zones comprises at least one touch module, each touch module comprises a photosensitive unit and a touch reading unit, an output end of the photosensitive unit is connected to an input end of the touch reading unit, a control end of the touch reading unit is connected to a corresponding touch scanning line, and an output end of the touch reading unit is connected to a corresponding touch reading line.

2. The in-cell touch display panel according to claim 1, further comprising a light source for display which is used when the display area is in display, wherein:

the photosensitive unit generates a touch signal in response to receiving light and supplies the generated touch signal to the input end of the touch reading unit;

when the touch reading unit is in a turn-on state under control of the corresponding touch scanning line, the touch reading unit outputs the touch signal to the touch reading line; and

when a touch object approaches the touch display panel within a preset distance range, the touch object reflects at least part of the light from the light source for display onto the photosensitive unit, and the at least part of the light reflected onto the photosensitive unit is the light received by the photosensitive unit.

3. The in-cell touch display panel according to claim 1, wherein the photosensitive unit comprises a photosensitive transistor;

a source electrode and a gate electrode of the photosensitive transistor are connected to each other, and a drain electrode of the photosensitive transistor is the output end of the photosensitive unit.

4. The in-cell touch display panel according to claim 3, wherein source electrodes and drain electrodes of all the photosensitive transistors located within a same touch zone are connected with together.

5. The in-cell touch display panel according to claim 1, wherein the touch reading unit comprises a switch transistor;

wherein a source electrode of the switch transistor is the input end of the touch reading unit, a gate electrode of the switch transistor is the control end of the touch reading unit, and a drain electrode of the switch transistor is the output end of the touch reading unit.

6. The in-cell touch display panel according to claim 1, wherein each row of the touch zones corresponds to one touch scanning line.

7. The in-cell touch display panel according to claim 1, wherein each of the touch zones comprises M×

N touch modules and corresponds to M touch scanning lines, wherein M is a quantity of rows, N is a quantity of columns;

in a same row of touch zones, each row of the touch modules that belong to the same row of touch zones correspond to one touch scanning line.

8. The in-cell touch display panel according to claim 7, wherein at least one gate signal line of the touch display panel is a touch scanning line.

9. The in-cell touch display panel according to claim 2, wherein the in-cell touch display panel is a liquid crystal panel, the light source for display is a backlight source for the liquid crystal panel, and the light received by the photosensitive unit includes light emitted by the backlight source for the liquid crystal panel and reflected onto the photosensitive unit by a touch object.

10. The in-cell touch display panel according to claim 1, wherein the in-cell touch display panel is a field sequential driven liquid crystal panel.

11. The in-cell touch display panel according to claim 10, wherein the field sequential driven liquid crystal panel comprises a liquid crystal display panel and an organic electroluminescence backlight source;

the organic electroluminescence backlight source comprises a plurality of organic electroluminescence sub-pixels arranged in arrays, and the organic electroluminescence backlight source is used to drive the sub-pixels to emit light when the liquid crystal display panel displays an image;

the light received by the photosensitive unit includes light emitted by the sub-pixels of the organic electroluminescence backlight source and reflected onto the photosensitive unit by a touch object.

12. The in-cell touch display panel according to claim 2, wherein the in-cell touch display panel is an organic electroluminescence display panel, the light source for display includes individual sub-pixels in the organic electroluminescence display panel, the light received by the photosensitive unit includes light emitted by the individual sub-pixels of the organic electroluminescence display panel and reflected onto the photosensitive unit by a touch object.

13. A touch display system comprising the in-cell touch display panel according to claim 1.

14. The touch display system according to claim 13, further comprising a touch object for touching the in-cell touch display panel.

15. The touch display system according to claim 14, wherein a surface of the touch object used to approach the in-cell touch display panel includes reflective material.

16. The in-cell touch display panel according to claim 2, wherein the photosensitive unit comprises a photosensitive transistor;

a source electrode and a gate electrode of the photosensitive transistor are connected to each other, and a drain electrode of the photosensitive transistor is the output end of the photosensitive unit.

17. The in-cell touch display panel according to claim 2, wherein the touch reading unit comprises a switch transistor;

wherein a source electrode of the switch transistor is the input end of the touch reading unit, a gate electrode of the switch transistor is the control end of the touch reading unit, and a drain electrode of the switch transistor is the output end of the touch reading unit.

18. The in-cell touch display panel according to claim 2, wherein each row of the touch zones corresponds to one touch scanning line.

19. The in-cell touch display panel according to claim 2, wherein each of the touch zones comprises M×

N touch modules and corresponds to M touch scanning lines, wherein M is a quantity of rows, N is a quantity of columns;

in a same row of touch zones, each row of the touch modules that belong to the same row of touch zones correspond to one touch scanning line.

20. The in-cell touch display panel according to claim 3, wherein the in-cell touch display panel is a liquid crystal panel, the light source for display is a backlight source for the liquid crystal panel, and the light received by the photosensitive unit includes light emitted by the backlight source for the liquid crystal panel and reflected onto the photosensitive unit by a touch object.