SELF-CAPACITIVE TOUCH DISPLAY PANEL AND ARRAY SUBSTRATE THEREOF

• US 20160291724A1
• Filed: 12/08/2015
• Published: 10/06/2016
• Est. Priority Date: 04/01/2015
• Status: Active Grant

• Current Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited), Tianma Microelectronics Company Limited
• Original Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited), Tianma Microelectronics Company Limited
• Inventors: Li, Gujun, Sun, Yungang, Yang, Kang
• Granted Patent: US 9,703,440 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 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

A self-capacitive touch display panel and an array substrate thereof are provided in the disclosure. The array substrate includes a substrate, where gate lines, data lines, and a common electrode layer are provided on the substrate, and the gate lines and the data lines are insulated from each other and cross each other to define a plurality of pixel units arranged in an array; the pixel unit includes a pixel thin film transistor and a pixel electrode; the common electrode layer includes a plurality of touch-control units; a plurality of touch-control-driving thin film transistors are further provided on the substrate; and the touch-control unit is connected to drains of at least two touch-control-driving thin film transistors, the gates of the two touch-control-driving thin film transistors are connected to different gate lines, and the sources of the two touch-control-driving thin film transistors are connected to different data lines.

Claims

1. An array substrate for a self-capacitive touch display panel, comprising:

a substrate, wherein a plurality of gate lines, a plurality of data lines, and a common electrode layer are provided on the substrate, and the gate lines and the data lines are insulated from each other and cross each other to define a plurality of pixel units arranged in an array;

wherein;

each pixel unit comprises a pixel thin film transistor and a pixel electrode;

the common electrode layer comprises a plurality of touch-control units insulated from each other, and each touch-control unit corresponds to a plurality of the pixel units;

a plurality of touch-control-driving thin film transistors are provided on the substrate;

each touch-control unit is connected to a drain of at least two touch-control-driving thin film transistors, wherein gates of the two touch-control-driving thin film transistors are connected to different gate lines, and sources of the two touch-control-driving thin film transistors are connected to different data lines.

2. The array substrate according to claim 1, wherein the plurality of touch-control units are arranged in an array.

3. The array substrate according to claim 2, wherein in one pixel unit, at most one touch-control-driving thin film transistor is provided correspondingly.

4. The array substrate according to claim 3, wherein in each pixel unit, a gate of the pixel thin film transistor is connected to an adjacent gate line, a source of the pixel thin film transistor is connected to an adjacent data line, and a drain of the pixel thin film transistor is connected to a pixel electrode;

and

the touch-control-driving thin film transistor and the pixel thin film transistor connected to a same data line are provided on two sides of the data line respectively or on a same side of the data line.

5. The array substrate according to claim 1, wherein the common electrode layer is provided between the pixel electrode and the substrate;

or

the pixel electrode is provided between the common electrode layer and the substrate.

6. The array substrate according to claim 1, wherein the touch-control-driving thin film transistor and the pixel thin film transistor are provided on a same layer.

7. The array substrate according to claim 1, wherein turn-on voltages of the touch-control-driving thin film transistor and the pixel thin film transistor connected to a same gate line are different at a same moment.

8. The array substrate according to claim 1, wherein in a same touch-control unit, the data lines connected to the touch-control-driving thin film transistors are arranged consecutively;

or, in the same touch-control unit, the data lines connected to the touch-control-driving thin film transistors are arranged at intervals.

9. The array substrate according to claim 1, wherein the array substrate comprises a red pixel unit, a green pixel unit and a blue pixel unit;

and

the touch-control-driving thin film transistor is provided in the array substrate at a location corresponding to the red pixel unit, or is provided in the array substrate at a location corresponding to the blue pixel unit.

10. The array substrate according to claim 1, wherein in a same touch-control unit, part of the pixel units connected to a same data line as the touch-control-driving thin film transistor are located in frame region;

or, in the same touch-control unit, at least part of the pixel units connected to the same data line as the touch-control-driving thin film transistor are white pixel units.

11. A self-capacitive touch display panel, comprising:

an array substrate;

a color film substrate disposed oppositely to the array substrate; and

a display medium provided between the array substrate and the color film substrate;

the array substrate comprising;

a substrate, wherein a plurality of gate lines, a plurality of data lines, and a common electrode layer are provided on the substrate, and the gate lines and the data lines are insulated from each other and cross each other to define a plurality of pixel units arranged in an array;

wherein;

each pixel unit comprises a pixel thin film transistor and a pixel electrode;

the common electrode layer comprises a plurality of touch-control units insulated from each other, and each touch-control unit corresponds to a plurality of the pixel units;

a plurality of touch-control-driving thin film transistors are provided on the substrate;

each touch-control unit is connected to a drain of at least two touch-control-driving thin film transistors, wherein gates of the two touch-control-driving thin film transistors are connected to different gate lines, and sources of the two touch-control-driving thin film transistors are connected to different data lines.

12. The self-capacitive touch display panel according to claim 11, wherein operating time of the touch display panel comprises a display period and a touch-control period;

during the touch-control period, the touch-control-driving thin film transistors are turned on, and a touch-control signal is transmitted to the touch-control unit through the touch-control-driving thin film transistors; and

during the display period, data signals for display are inputted to a plurality of data lines in turn and are transmitted to corresponding pixel electrodes through the pixel thin film transistors, and in a same touch-control unit, at a same moment, at least one data line transmits the common signal to the touch-control unit through the touch-control-driving transistor.

13. The self-capacitive touch display panel according to claim 12, wherein the pixel thin film transistor is NMOS, and the touch-control-driving thin film transistor is PMOS.

14. The self-capacitive touch display panel according to claim 13, wherein during the touch-control period, the PMOS is turned on, and the touch-control signal is transmitted to the touch-control unit through the PMOS;

and

during the display period, the data signals for display are inputted to a plurality of data lines in turn, and are transmitted to corresponding pixel electrodes through the NMOS, and in a same touch-control unit, at the same moment, at least one data line transmits the common signal to the touch-control unit through the PMOS.

15. The self-capacitive touch display panel according to claim 12, wherein the pixel thin film transistor is PMOS, and the touch-control-driving thin film transistor is NMOS.

16. The self-capacitive touch display panel according to claim 15, wherein during the touch-control period, the NMOS is turned on, and the touch-control signal is transmitted to the touch-control unit through the NMOS;

and

during the display period, the data signals for display are inputted to a plurality of data lines in turn and are transmitted to corresponding pixel electrodes through the PMOS, and in the same touch-control unit, at the same moment, at least one data line transmits the common signal to the touch-control unit through the NMOS.

17. The self-capacitive touch display panel according to claim 12, wherein during the display period:

when the data signal for display is provided, through one data line connected to the touch-control-driving thin film transistor, to a corresponding touch-control unit, the common signal is inputted to other data lines connected to the touch-control-driving thin film transistor simultaneously; and

when there is no data line connected to the touch-control-driving thin film transistor providing the data signal for display to the corresponding touch-control unit, the common signal is inputted to all the data lines connected to the touch-control-driving thin film transistor simultaneously.