ARRAY SUBSTRATE AND DRIVING METHOD THEREOF, DISPLAY PANEL AND DISPLAY DEVICE

• US 20170115811A1
• Filed: 10/30/2015
• Published: 04/27/2017
• Est. Priority Date: 06/18/2015
• 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, Shengji, DONG, Xue, WANG, Haisheng, CHEN, Xiaochuan, LIU, Yingming, ZHAO, Weijie, LI, Changfeng, LIU, Jiantao, WANG, Lei, XU, Rui, LIU, Hongjuan
• Granted Patent: US 10,241,610 B2
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/1362 Active matrix addressed cells G02F1/134336, G02F1/134363 take precedence
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/042 by opto-electronic means
• CPC Class Codes: G06V 40/1306 non-optical, e.g. ultrasonic or capacitive sensing
• CPC Class Codes: G06V 40/1365 Matching; Classification
• CPC Class Codes: G09G 2300/0809 Several active elements per pixel in active matrix panels
• CPC Class Codes: G09G 2354/00 Aspects of interface with display user
• CPC Class Codes: G09G 2360/14 Detecting light within display terminals, e.g. using a single or a plurality of photosensors
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 3/3655 Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors

Abstract

An array substrate and a driving method thereof, a display panel and a display device. The array substrate includes a plurality of areas. Each area at least includes a first subpixel and a second subpixel, and each subpixel includes a corresponding display unit; the first subpixel includes a photosensitive identification unit, the photosensitive identification unit is connected with a read signal line and is configured to acquire and store position information of a touch position and transmit the acquired position information to the read signal line; and the second subpixel includes a capacitive detection unit, the capacitive detection unit is connected with the read signal line and is configured to acquire information of a touch object and transmit the acquired information of the touch object to the read signal line. The display device has a function of touch object identification (e.g., palm print identification) and has a simple structure.

Claims

1. An array substrate, comprising a plurality of areas, wherein each area at least includes a first subpixel and a second subpixel, and each subpixel includes a corresponding display unit;

the first subpixel includes a photosensitive identification unit, the photosensitive identification unit is connected with a read signal line and is configured to acquire and store position information of a touch position and transmit the acquired position information to the read signal line; and

the second subpixel includes a capacitive detection unit, the capacitive detection unit is connected with the read signal line and is configured to acquire information of a touch object and transmit the acquired information of the touch object to the read signal line.

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

the first subpixel further includes a first display unit which is connected with a first display scanning line, a first data line and a common voltage port, and the first display unit is configured to store a data signal inputted into the first data line under the control of the first display scanning line and the common voltage port;

the second subpixel further includes a second display unit which is connected with a second display scanning line, a second data line and the common voltage port, and the second display unit is configured to store a data signal inputted into the second data line under the control of the second display scanning line and the common voltage port;

the photosensitive identification unit is also connected with an identification scanning line and the common voltage port, and is configured to acquire and store the position information of the touch position under the control of the common voltage port and transmit the acquired position information to the read signal line under the control of the identification scanning line; and

the capacitive detection unit is also connected with a third display scanning line, a detection scanning line and the common voltage port, and is configured to reset under the control of the third display scanning line and the common voltage port, acquire the information of the touch object under the control of the detection scanning line, and transmit the acquired information of the touch object to the read signal line.

3. The array substrate according to claim 1, wherein each display unit includes a first transistor and a first capacitor;

a gate electrode of the first transistor is connected with a corresponding display scanning line;

a first end of the first transistor is connected with a corresponding data line;

a second end of the first transistor is connected with one end of the first capacitor; and

another end of the first capacitor is connected with the common voltage port.

4. The array substrate according to claim 2, wherein the photosensitive identification unit includes a second transistor, a third transistor and a second capacitor;

both a gate electrode and a first end of the second transistor are connected with the common voltage port, and a second end of the second transistor is connected with a first end of the second capacitor;

a gate electrode of the third transistor is connected with the identification scanning line;

a first end of the third transistor is connected with the first end of the second capacitor;

a second end of the third transistor is connected with the read signal line;

a second end of the second capacitor is connected with the common voltage port; and

the second transistor is a photosensitive transistor.

5. The array substrate according to claim 2, wherein the capacitive detection unit includes a fourth transistor, a fifth transistor, a sixth transistor, a third capacitor and a detection electrode;

a gate electrode of the fourth transistor is connected with the third display scanning line;

a first end of the fourth transistor is connected with the common voltage port;

a second end of the fourth transistor is connected with a first end of the third capacitor;

a gate electrode of the fifth transistor is connected with the first end of the third capacitor;

a first end of the fifth transistor is connected with the common voltage port;

a second end of the fifth transistor is connected with a first end of the sixth transistor;

a gate electrode of the sixth transistor is connected with the detection scanning line, and a second end of the sixth transistor is connected with the read signal line;

the detection electrode is connected with one end of the third capacitor;

a second end of the third capacitor is connected with the third display scanning line; and

the fifth transistor is an amplifier transistor.

6. A display panel, comprising the array substrate according to claim 1.

7. A display device, comprising the display pan&

according to claim 6 and a signal receiving device connected with the read signal line,

wherein the signal receiving device is configured to receive the position information and the information of the touch object outputted by the read signal line.

8. A driving method for driving the array substrate according to claim 1, comprising:

in a first period of each frame, inputting scanning signals into display scanning lines row by row, inputting data signals into data lines to charge corresponding display units, and resetting capacitive detection units under the control of common voltage ports and display scanning lines connected with the capacitive detection units;

in a second period of a first frame, inputting signals into the common voltage ports, acquiring and storing position information of a touch position by photosensitive identification units, inputting scanning signals into identification scanning lines row by row, and transmitting the acquired position information to read signal lines for determination of the touch position; and

in a second period of a second frame, inputting scanning signals into detection signal lines within a range of the touch position, acquiring information of a touch object and transmitting the acquired information of the touch object to the read signal lines by capacitive detection units, and finishing identification of the touch object.

9. The driving method according to claim 8, wherein:

in the first period of each frame, when the scanning signals are inputted into the respective display scanning lines row by row, first transistors connected with the respective display scanning lines are switched on, and first capacitors are charged by signals inputted through the corresponding data lines; and

when the scanning signals are inputted into corresponding display scanning lines connected with the capacitive detection units, fourth transistors are switched on, and third capacitors are reset by voltages on the common voltage ports through the fourth transistors.

10. The driving method according to claim 8, wherein:

in the second period of the first frame, signals are inputted into the common voltage ports, and second transistors are switched on;

in a case of covering by the touch object, electric potential differences of second capacitors are varied;

scanning signals are inputted into the identification scanning lines row by row, and third transistors are switched on;

signals indicating the electric potential differences are transmitted to the read signal lines through the third transistors; and

the touch position is determined.

11. The driving method according to claim 8, wherein the touch position is a palm position, and the information of the touch object is palm print information;

in the second period of the second frame, coupling capacitors are formed between concave portions of the palm print and a detection electrode to cause fifth transistors to be switched on;

or, coupling capacitors are formed between convex portions of the palm print and the detection electrode to cause the fifth transistors to be switched off;

when scanning signals are inputted into detection scanning lines within the range of the palm position, sixth transistors are switched on;

when the fifth transistors are switched on, signals inputted through the common voltage ports are amplified by the fifth transistors and transmitted to the read signal lines through the sixth transistors;

and when the fifth transistors are switched off, initial current signals at second ends of the fifth transistors are transmitted to the read signal lines through the sixth transistors, and palm print identification is finished.

12. The array substrate according to claim 2, wherein the third display scanning line connected with the capacitive detection unit is any scanning line in a corresponding area.

13. The array substrate according to claim 2, wherein the second display scanning line connected with the second display unit and the third display scanning line connected with the capacitive detection unit are different display scanning lines;

or the second display scanning line connected with the second display unit and the third display scanning line connected with the capacitive detection unit are a same scanning line.

14. The array substrate according to claim 2, wherein the first display scanning line connected with the first display unit and the third display scanning line connected with the capacitive detection unit are different display scanning lines;

or, the first display scanning line connected with the first display unit and the third display scanning line connected with the capacitive detection unit are a same scanning line.

15. The array substrate according to claim 2, wherein the first data line and the second data line are different data lines;

or, the first data line and the second data line are a same data line.

16. The array substrate according to claim 2, wherein each display unit includes a first transistor and a first capacitor;

a gate electrode of the first transistor is connected with a corresponding display scanning line;

a first end of the first transistor is connected with a corresponding data line;

a second end of the first transistor is connected with one end of the first capacitor; and

another end of the first capacitor is connected with the common voltage port.

17. The array substrate according to claim 3, wherein the third display scanning fine connected with the capacitive detection unit is any scanning fine in a corresponding area.

18. The array substrate according to claim 3, wherein the second display scanning line connected with the second display unit and the third display scanning line connected with the capacitive detection unit are different display scanning fines;

or the second display scanning line connected with the second display unit and the third display scanning line connected with the capacitive detection unit are a same scanning line.

19. The array substrate according to claim 3, wherein the first display scanning line connected with the first display unit and the third display scanning line connected with the capacitive detection unit are different display scanning fines;

or, the first display scanning fine connected with the first display unit and the third display scanning fine connected with the capacitive detection unit are a same scanning line.

20. The array substrate according to claim 3, wherein the first data line and the second data line are different data ones;

or, the first data line and the second data line are a same data line.