TOUCH DISPLAY PANEL, METHOD FOR DRIVING THE SAME AND TOUCH DISPLAY APPARATUS

• US 20170045995A1
• Filed: 07/09/2015
• Published: 02/16/2017
• Est. Priority Date: 12/16/2014
• 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: ZHAO, Weijie, DONG, Xue, WANG, Haisheng, LIU, Yingming
• Granted Patent: US 10,268,307 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/136218 Shield electrodes
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G02F 1/13685 Top gates
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• 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 3/0445 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 panel, a method for driving the same and a touch display apparatus are provided. The touch display panel includes an array substrate and a cell alignment substrate arranged oppositely, a touch driving electrode, a first touch sensitive electrode and a second touch sensitive electrode. The first touch sensitive electrode is arranged on the cell alignment substrate, and the second touch sensitive electrode is arranged on the array substrate, the touch driving electrode is arranged between the first touch sensitive electrode and the second touch sensitive electrode. Mutual capacitances are generated between the touch driving electrode with each of the first touch sensitive electrode and the second touch sensitive electrode. The double-sided touch mode can be achieved according to the disclosure.

Claims

1. A touch display panel, comprising:

an array substrate and a cell alignment substrate arranged oppositely, a touch driving electrode, a first touch sensitive electrode and a second touch sensitive electrode;

wherein the first touch sensitive electrode is on the cell alignment substrate, and the second touch sensitive electrode is on the array substrate, the touch driving electrode is between the first touch sensitive electrode and the second touch sensitive electrode;

mutual capacitances are generated between the touch driving electrode with each of the first touch sensitive electrode and the second touch sensitive electrode.

2. The touch display panel according to claim 1, wherein each of the array substrate and the cell alignment substrate comprises a base substrate;

the touch driving electrode is on a side of the base substrate of the array substrate facing toward the cell alignment substrate;

the first touch sensitive electrode is on a side of the base substrate of the cell alignment substrate facing toward the array substrate or facing away from the array substrate;

the second touch sensitive electrode is on a side of the base substrate of the array substrate facing toward the cell alignment substrate or facing away from the cell alignment substrate.

3. The touch display panel according to claim 2, wherein the array substrate further comprises a common electrode;

the touch driving electrode comprises a first touch driving electrode;

the first touch driving electrode and the common electrode are made of the same material and arranged in the same layer.

4. The touch display panel according to claim 3, wherein the touch driving electrode further comprises a second touch driving electrode;

the second touch driving electrode is in a different layer from the first touch driving electrode;

a mutual capacitance is generated between the first touch driving electrode and the first touch sensitive electrode; and

a mutual capacitance is generated between the second touch driving electrode and the second touch sensitive electrode.

5. The touch display panel according to claim 4, wherein the array substrate further comprises a thin film transistor;

the second touch driving electrode is a shutter bar between the thin film transistor and the base substrate of the array substrate and configured for shielding a channel of the thin film transistor.

6. The touch display panel according to claim 4, wherein the first touch driving electrode is electrically connected to the second touch driving electrode.

7. The touch display panel according to claim 6, wherein the first touch driving electrode comprises a plurality of first driving sub-electrodes which are parallel to each other;

the second touch driving electrode comprises a plurality of second driving sub-electrodes which are parallel to each other;

the first driving sub-electrodes are electrically connected to the second driving sub-electrodes respectively.

8. The touch display panel according to claim 7, wherein the first touch sensitive electrode comprises a plurality of first sensitive sub-electrodes which are parallel to each other;

the second touch sensitive electrode comprises a plurality of second sensitive sub-electrodes which are parallel to each other;

the number and arrangement of the first sensitive sub-electrodes are the same as that of the second sensitive sub-electrodes;

the first sensitive sub-electrodes correspond to the second sensitive sub-electrodes in a one-to-one manner; and

each of the first sensitive sub-electrodes is connected to the corresponding one of the second sensitive sub-electrodes; and

wherein the first sensitive sub-electrodes and the first driving sub-electrodes are in different planes, and the first sensitive sub-electrodes are not parallel with the first driving sub-electrodes;

a mutual capacitance is generated at each overlap portion of the first sensitive sub-electrodes and the first driving sub-electrodes;

the second sensitive sub-electrodes and the second driving sub-electrodes are in different planes, and the second sensitive sub-electrodes are not parallel with the second driving sub-electrodes;

a mutual capacitance is generated at each overlap portion of the second sensitive sub-electrodes and the second driving sub-electrodes.

9. The touch display panel according to claim 2, wherein the first touch sensitive electrode comprises a plurality of first sensitive sub-electrodes which are parallel to each other;

the second touch sensitive electrode comprises a plurality of second sensitive sub-electrodes which are parallel to each other;

the number and arrangement of the first sensitive sub-electrodes are the same as that of the second sensitive sub-electrodes;

the first sensitive sub-electrodes correspond to the second sensitive sub-electrodes in a one-to-one manner; and

each of the first sensitive sub-electrodes is connected to the corresponding one of the second sensitive sub-electrodes.

10. The touch display panel according to claim 9, wherein each of the first sensitive sub-electrodes is connected to the corresponding one of the second sensitive sub-electrodes via a flexible circuit board on a side of the cell alignment substrate, a flexible circuit board on a side of the array substrate and a connection wire for connecting the two flexible circuit boards;

the connection wire comprises a plurality of connection sub-wires and each of the connection sub-wires corresponds to one of the first sensitive sub-electrodes and one of the second sensitive sub-electrodes.

11. A touch display apparatus, comprising:

the touch display panel according to claim 1.

12. A method for driving the touch display panel according to claim 1, comprising:

applying a touch driving signal to the touch driving electrode; and

detecting a touch sensitive signal generated by coupling the mutual capacitance between the first touch sensitive electrode and/or the second touch sensitive electrode with the touch driving electrode, and determining touch position information according to change of the touch sensitive signal.

13. The method according to claim 12, wherein the touch driving electrode comprises a first touch driving electrode and a second touch driving electrode;

a mutual capacitance is generated between the first touch driving electrode and the first touch sensitive electrode;

a mutual capacitance is generated between the second touch driving electrode and the second touch sensitive electrode;

the step of applying the touch driving signal to the touch driving electrode comprises;

applying one touch driving signal to the first touch driving electrode or the second touch driving electrode;

or

applying the same touch driving signal or different touch driving signals to the first touch driving electrode and the second touch driving electrode.

14. The method according to claim 12, further comprising:

supplying a touch sensitive signal to the first touch sensitive electrode and the second touch sensitive electrode in a touch period, and supplying a zero voltage to the first touch sensitive electrode and the second touch sensitive electrode in a display period, to eliminate static electricity on the first touch sensitive electrode and the second touch sensitive electrode.

15. A touch display panel, comprising:

an array substrate and a cell alignment substrate arranged oppositely, a first touch driving electrode, a second touch driving electrode, a first touch sensitive electrode and a second touch sensitive electrode;

wherein the first touch sensitive electrode is on the cell alignment substrate, and the second touch sensitive electrode is on the array substrate;

wherein the first touch driving electrode and the second touch driving electrode are in different layers between the first touch sensitive electrode and the second touch sensitive electrode;

the first touch driving electrode and the first touch sensitive electrode define a first touch structure;

the second touch driving electrode and the second touch sensitive electrode define a second touch structure; and

the first touch structure and the second touch structure are at two sides of the touch display panel respectively.

16. The touch display panel according to claim 15, wherein the first touch driving electrode comprises a plurality of first driving sub-electrodes which are parallel to each other;

the second touch driving electrode comprises a plurality of second driving sub-electrodes which are parallel to each other;

the first touch sensitive electrode comprises a plurality of first sensitive sub-electrodes which are parallel to each other;

the second touch sensitive electrode comprises a plurality of second sensitive sub-electrodes which are parallel to each other;

the number and arrangement of the first sensitive sub-electrodes are the same as that of the second sensitive sub-electrodes;

the first sensitive sub-electrodes correspond to the second sensitive sub-electrodes in a one-to-one manner;

each of the first sensitive sub-electrodes is connected to the corresponding one of the second sensitive sub-electrodes; and

the first sensitive sub-electrodes and the first driving sub-electrodes are in different planes, and the first sensitive sub-electrodes are not parallel with the first driving sub-electrodes;

a mutual capacitance is generated at each overlap portion of the first sensitive sub-electrodes and the first driving sub-electrodes;

the second sensitive sub-electrodes and the second driving sub-electrodes are in different planes, and the second sensitive sub-electrodes are not parallel with the second driving sub-electrodes;

a mutual capacitance is generated at each overlap portion of the second sensitive sub-electrodes and the second driving sub-electrodes.

17. The touch display panel according to claim 16, wherein the first driving sub-electrodes are electrically connected to corresponding ones of the second driving sub-electrodes, respectively.

18. A method for driving the touch display panel according to claim 15, comprising:

judging whether the touch display panel is in a single-sided touch mode or a double-sided touch mode;

when the touch display panel is in the single-sided touch mode, judging whether the first touch structure or the second touch structure is selected for a touch operation;

when the first touch structure is selected for the touch operation, closing the second touch structure, applying a touch driving signal to the first touch driving electrode, detecting a first touch sensitive signal generated by coupling the mutual capacitance between the first touch sensitive electrode and the first touch driving electrode, and determining touch position information according to change of the first touch sensitive signal;

when the second touch structure is selected for the touch operation, closing the first touch structure, applying a touch driving signal to the second touch driving electrode, detecting a second touch sensitive signal generated by coupling the mutual capacitance between the second touch sensitive electrode and the second touch driving electrode, and determining touch position information according to change of the second touch sensitive signal;

when the touch display panel is in the double-sided touch mode,

applying a touch driving signal to the first touch driving electrode and the second touch driving electrode at the same time;

detecting a first touch sensitive signal generated by coupling the mutual capacitance between the first touch sensitive electrode and the first touch driving electrode, and detecting a second touch sensitive signal generated by coupling the mutual capacitance between the second touch sensitive electrode and the second touch driving electrode; and

determining touch position information according to change of the first touch sensitive signal and the second touch sensitive signal.