Array substrate, touch display device and driving method

• US 10,101,834 B2
• Filed: 10/01/2014
• Issued: 10/16/2018
• Est. Priority Date: 08/07/2014
• 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: Zheng, Dan
• Primary Examiner(s): Regn, Mark
• Application Number:
  US14/774,887
• Publication Number:
  US 20160202815A1
• Time in Patent Office: 1,476 Days
• Field of Search: 345174
• 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 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
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52

Abstract

An array substrate, a touch display device, and a driving method are provided. The array substrate includes a data line layer which includes a plurality of first touch electrodes; a common electrode layer which includes a plurality of second touch electrodes; and a first switch signal line. Each first touch electrode includes a plurality of data lines and a plurality of first switch elements, a control terminal (a) of the first switch element is connected to the first switch signal line, a first terminal (b) of the first switch element is connected one of the data lines in the first touch electrode, and a second terminal (c) of the first switch element is connected another of data lines in the first touch electrode, so that all of the data lines in the first touch electrode are electrically connected to each other upon the first touch electrode being turned on.

Claims

1. An array substrate comprising:

a data line layer which includes a plurality of first touch electrodes;

a common electrode layer which includes a plurality of second touch electrodes which are arranged to insulate from and cross the first touch electrodes; and

a first switch signal line,

wherein each first touch electrode includes a plurality of data lines and a plurality of first switch elements, a control terminal of each first switch element is connected to the first switch signal line, a first terminal of the first switch element is connected to one data line in the first touch electrode, a second terminal of the first switch element is connected to another data line in the first touch electrode and the first terminal of the first switch element is directly connected to a second terminal of an adjacent first switch element, so that all of the data lines in the first touch electrode are electrically connected to each other upon the first switch element being turned on.

2. The array substrate according to claim 1, wherein the data line connected to the first terminal of the first switch element and the data line connected to the second terminal thereof are adjacent to each other.

3. The array substrate according to claim 2, further including:

a second switch signal line; and

a plurality of second switch elements,

wherein the second switch signal line is connected to the plurality of second touch electrodes via the plurality of second switch elements and is configured such that the plurality of second touch electrodes are electrically connected to each other upon the plurality of second switch elements connected to the plurality of second touch electrodes being turned on, and/or

wherein the second switch signal line is connected to the plurality of first touch electrodes via the plurality of second switch elements and is configured such that the plurality of first touch electrodes are electrically connected to each other upon the plurality of second switch elements connected to the plurality of first touch electrodes being turned on.

4. The array substrate according to claim 3, wherein

for any one of the plurality of second switch elements connected to the plurality of second touch electrodes, a control terminal thereof is connected to the second switch signal line, a first terminal thereof is connected to one second touch electrode, and a second terminal thereof is connected with another second touch electrode;

and/or

for any one of the plurality of second switch elements connected to the plurality of first touch electrodes, a control terminal thereof is connected to the second switch signal line, a first terminal thereof is connected to one data line in one of the first touch electrodes, and a second terminal thereof is connected with one data line in another of the second touch electrodes.

5. The array substrate according to claim 3, wherein

for any one of the plurality of second switch elements connected to the plurality of second touch electrodes, the one second touch electrode connected to the first terminal thereof and another second touch electrode connected to the second terminal thereof are adjacent to each other;

and/or

for any one of the plurality of second switch elements connected to the plurality of first touch electrodes, the one first touch electrode connected to the first terminal thereof and another first touch electrode connected to the second terminal thereof are adjacent to each other.

6. The array substrate according to claim 1, wherein each of the first touch electrodes includes 15 to 20 data lines;

and/or a width of each of the second touch electrodes is from 4 nm to 10 mm.

7. The array substrate according to claim 1, wherein the second touch electrode is made of indium tin oxide.

8. The array substrate according to claim 1, further including:

a second switch signal line; and

a plurality of second switch elements,

wherein the second switch signal line is connected to the plurality of second touch electrodes via the plurality of second switch elements and is configured such that the plurality of second touch electrodes are electrically connected to each other upon the plurality of second switch elements connected to the plurality of second touch electrodes being turned on, and/or

wherein the second switch signal line is connected to the plurality of first touch electrodes via the plurality of second switch elements and is configured such that the plurality of first touch electrodes are electrically connected to each other upon the plurality of second switch elements connected to the plurality of first touch electrodes being turned on.

9. The array substrate according to claim 8, wherein

for any one of the plurality of second switch elements connected to the plurality of second touch electrodes, a control terminal thereof is connected to the second switch signal line, a first terminal thereof is connected to one second touch electrode, and a second terminal thereof is connected with another second touch electrode;

and/or

for any one of the plurality of second switch elements connected to the plurality of first touch electrodes, a control terminal thereof is connected to the second switch signal line, a first terminal thereof is connected to one data line in one of the first touch electrodes, and a second terminal thereof is connected with one data line in another of the second touch electrodes.

10. The array substrate according to claim 9, wherein

for any one of the plurality of second switch elements connected to the plurality of second touch electrodes, the one second touch electrode connected to the first terminal thereof and the another second touch electrode connected to the second terminal thereof are adjacent to each other;

and/or

for any one of the plurality of second switch elements connected to the plurality of first touch electrodes, the one first touch electrode connected to the first terminal thereof and another first touch electrode connected to the second terminal thereof are adjacent to each other.

11. A driving method for a touch display device including the array substrate according to claim 8, including:

during a touch period of time, applying an ON signal, by first switch signal terminals, to a control terminal of each of the first switch elements via the first switch signal line, turning off the second switch elements, and sequentially applying touch scan signals, by first touch signal terminals, to the plurality of first touch electrodes or sequentially applying touch scan signals, by second touch signal terminals, to the plurality of second touch electrodes;

during a transition period of time after the touch period of time ends and before a display period of time starts, applying an ON signal, by the first switch signal terminal, to the control terminal of each of the first switch elements via the first switch signal line and applying an ON signal, by the second touch signal terminal, to a control terminal of each of the second switch elements via the second switch signal line; and

during the display period of time, turning off each of the first switch elements and each of the second switch elements.

12. The driving method according to claim 11, wherein

during a sub-period of time of the display period of time between time of applying gate drive signals to any two adjacent gate lines, the first switch signal terminal applies an ON signal to the control terminal of each of the first switch elements via the first switch signal line and the second touch signal terminal applies an ON signal to the control terminal of each of the second switch elements via the second switch signal line;

and

during other sub-period of time of the display period of time, each of the first switch elements and each of the second switch elements are turned off.

13. A touch display device including the array substrate according to claim 1.

14. The touch display device according to claim 13, wherein the data line connected to the first terminal of the first switch element and the data line connected to the second terminal thereof are adjacent to each other.

15. The touch display device according to claim 13, wherein each of the first touch electrodes includes 15 to 20 data lines;

and/or a width of each of the second touch electrodes is from 4 nm to 10 mm.

16. The touch display device according to claim 13, wherein the second touch electrode is made of indium tin oxide.

17. The touch display device according to claim 13, further including:

a second switch signal line; and

a plurality of second switch elements,

wherein the second switch signal line is connected to the plurality of second touch electrodes via the plurality of second switch elements and is configured such that the plurality of second touch electrodes are electrically connected to each other upon the plurality of second switch elements connected to the plurality of second touch electrodes being turned on, and/or

wherein the second switch signal line is connected to the plurality of first touch electrodes via the plurality of second switch elements and is configured such that the plurality of first touch electrodes are electrically connected to each other upon the plurality of second switch elements connected to the plurality of first touch electrodes being turned on.

18. The touch display device according to claim 17, wherein

for any one of the plurality of second switch elements connected to the plurality of second touch electrodes, a control terminal thereof is connected to the second switch signal line, a first terminal thereof is connected to one second touch electrode, and a second terminal thereof is connected with another second touch electrode;

and/or

for any one of the plurality of second switch elements connected to the plurality of first touch electrodes, a control terminal thereof is connected to the second switch signal line, a first terminal thereof is connected to one data line in one of the first touch electrodes, and a second terminal thereof is connected with one data line in another of the second touch electrodes.

19. The touch display device according to claim 18, wherein

for any one of the plurality of second switch elements connected to the plurality of second touch electrodes, the one second touch electrode connected to the first terminal thereof and the another second touch electrode connected to the second terminal thereof are adjacent to each other;

and/or

for any one of the plurality of second switch elements connected to the plurality of first touch electrodes, the one first touch electrode connected to the first terminal thereof and another first touch electrode connected to the second terminal thereof are adjacent to each other.

20. A driving method for a touch display device including the array substrate according to claim 1, including:

during a touch period of time, applying an ON signal, by a first switch signal terminal, to a control terminal of each of the first switch elements via the first switch signal line, and applying touch scan signals, by first touch signal terminals, to the plurality of first touch electrodes or applying touch scan signals, by second touch signal terminals, to the plurality of second touch electrodes; and

during a display period of time, turning off each of the first switch elements.