Array substrate, display panel and display device

• US 10,061,455 B2
• Filed: 05/13/2016
• Issued: 08/28/2018
• Est. Priority Date: 12/11/2015
• Status: Active Grant

• Current Assignee: Shanghai AVIC Optoelectronics Company Limited (Tianma Microelectronics Company Limited), Tianma Microelectronics Company Limited
• Original Assignee: Shanghai AVIC Optoelectronics Company Limited (Tianma Microelectronics Company Limited), Tianma Microelectronics Company Limited
• Inventors: Xi, Kerui, Cao, Zhaokeng, Cui, Tingting
• Primary Examiner(s): Mehmood, Jennifer
• Assistant Examiner(s): Nokham, James
• Application Number:
  US15/154,502
• Publication Number:
  US 20170168605A1
• Time in Patent Office: 837 Days
• 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 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters

Abstract

An array substrate, a display panel, and a display device are provided. The array substrate comprises a touch circuit including a plurality of first switching units, a controlling unit, and a plurality of touch detecting terminals, and a plurality of independent touch electrodes arranged in an array. The touch electrode is electrically connected to the touch detecting terminal through at least one first switching unit. When the array substrate is in a touch detecting stage, the controlling unit controls the first switching units to be turned on, such that the touch electrodes are progressively detected.

Claims

1. An array substrate, comprising:

a touch circuit including a plurality of first switching units, a controlling unit, and a plurality of touch detecting terminals;

a plurality of independent touch electrodes arranged in an array;

a plurality of second switching units; and

at least one reference signal terminal providing a reference signal

wherein;

a touch electrode is electrically connected to a touch detecting terminal through at least one of the plurality of first switching units, and electrically connected to the at least one reference signal terminal through at least one of the plurality of second switching units,

when the array substrate is in a touch detecting stage, the controlling unit controls the first switching units to be turned on while the second switching units to be turned off such that the touch electrodes are progressively detected,

when the array substrate is in a displaying stage, the controlling unit controls the first switching units to be turned off while the second switching units to be turned on, such that the reference signal is transferred to the touch electrodes from the at least one reference signal terminal,

the array substrate includes a non-display region and a display region, and the plurality of first switching units and the plurality of second switching units are disposed in the display region,

a first switching unit includes at least one first type transistor, wherein the at least one first type transistor has a gate electrode electrically connected to the controlling unit, a source electrode electrically connected to the touch electrode, and a drain electrode electrically connected to the touch detecting terminal, and

a second switching unit includes at least one second type transistor, wherein the at least one second type transistor has a gate electrode electrically connected to the controlling unit, a source electrode electrically connected to the at least one reference signal terminal and a drain electrode electrically connected to the touch electrode.

2. The array substrate according to claim 1, wherein:

when the array substrate is in the touch detecting stage, the controlling unit controls the first switching units to be turned on, such that the touch electrodes are detected row by row.

3. The array substrate according to claim 1, wherein:

when the array substrate is in the touch detecting stage, the controlling unit controls the first switching units to be turned on while the second switching units to be turned off, such that the touch electrodes are detected row by row.

4. The array substrate according to claim 1, wherein:

a first switching unit includes at least one first type transistor; and

a second switching unit includes at least one second type transistor,

wherein the at least one first type transistor and the at least one second type transistor have a same type conductive channel.

5. The array substrate according to claim 1, wherein:

a first switching unit includes at least one first type transistor; and

a second switching unit includes at least one second type transistor,

wherein the at least one first type transistor and the at least one second type transistor have different types of conductive channels.

6. The array substrate according to claim 5, wherein:

the first switching unit and the second switching unit electrically connected to a same touch electrode are electrically connected to the controlling unit through a same wire.

7. The array substrate according to claim 5, wherein:

the at least one first type transistor is an N-type transistor; and

the at least one second type transistor is a P-type transistor.

8. The array substrate according to claim 5, wherein:

the first switching unit includes a plurality of first type transistors connected in series,

wherein the plurality of first type transistors are electrically connected to the touch electrode and the touch detecting terminal.

9. The array substrate according to claim 5, wherein:

the second switching unit includes a plurality of second type transistors connected in parallel,

wherein the plurality of second type transistors are electrically connected to the touch electrode and the reference signal terminal.

10. The array substrate according to claim 1, wherein:

the at least one reference signal terminal is also a common signal terminal of the array substrate.

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

a common electrode disposed in a same layer of the touch electrodes.

12. The array substrate according to claim 1, wherein:

the touch detecting terminal is also a data signal terminal of the array substrate.

13. The array substrate according to claim 1, wherein:

the first switching units corresponding to the touch electrodes in a same touch electrode column are electrically connected to a same touch detecting terminal.

14. The array substrate according to claim 1, wherein:

the first switching units corresponding to the touch electrodes in a same touch electrode row are electrically connected to the controlling unit through a same wire.

15. A display panel comprising an array substrate according to claim 1.

16. A display device comprising a display panel according to claim 15.