Array substrate, touch screen and display apparatus containing the same, and method for driving the same

• US 10,209,836 B2
• Filed: 12/28/2015
• Issued: 02/19/2019
• Est. Priority Date: 08/13/2015
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Qin, Wei
• Primary Examiner(s): Sherman, Stephen G
• Application Number:
  US15/122,737
• Publication Number:
  US 20170177111A1
• Time in Patent Office: 1,149 Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• 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: G09G 3/36 using liquid crystals

Abstract

The present disclosure provides a method for driving an array substrate for fingerprint recognition. The method includes sequentially sending a switch-on signal by a processing unit to each gate line row by row along the column direction, the switch-on signal being divided into a first phase and a second phase. In the first phase of each switch-on signal, sending a touch-driving signal to pixel electrodes corresponding to the gate line through a first data line in each data line group, receiving a touch-sensing signal through a second data line in each data line group, and constructing a fingerprint pattern based on touch-sensing signals. In the second phase of each switch-on signal, simultaneously sending display signals to the first data line and the second data line in the data line groups to charge subpixel units corresponding to the gate line for displaying an image.

Claims

1. A method for driving an array substrate for fingerprint recognition, the array substrate including a plurality of subpixel units, each subpixel unit including a pixel electrode and a common electrode, a plurality of data lines arranged along a row direction, a plurality of gate lines arranged along a column direction, each subpixel unit being corresponding to a gate line and a data line, two adjacent data lines forming a data line group, the method comprising:

sequentially sending switch-on signals by a processor to the gate lines row by row along the column direction, a duration of one of the switch-on signals on a single one of the gate lines being divided into a first phase and a second phase with respect to time, wherein;

the first phase and the second phase are non-overlapping with respect to time, a combination of the first phase and the second phase corresponds to the duration of the one of the switch-on signals on the single one of the gate lines;

in the first phase of the one of the switch-on signals, sending a touch-driving signal by the processor to a pixel electrode corresponding to the gate line through a first data line in each data line group, receiving a touch-sensing signal through a second data line in each data line group by the processor, and constructing a fingerprint pattern based on touch-sensing signals by the processor; and

in the second phase of the one of the switch-on signals, simultaneously sending display signals by the processor to the first data lines and the second data lines in the data line groups to charge subpixel units corresponding to the gate line for displaying an image, a first data line in each data line group transmitting the touch-driving signal and the display signal respectively in the duration of the one of the switch-on signals, and a second data line in each data line group transmitting the touch-sensing signal and the display signal respectively in the duration of the one of the switch-on signals.

2. The method according to claim 1, wherein:

the first phase is for fingerprint recognition and the second phase is for charging the subpixel units.

3. The method according to claim 1, wherein the duration of the one of the switch-on signals on the single one of the gate lines is about 6.5 μ

s.

4. The method according to claim 1, wherein a duration of the first phase is longer than a duration of the second phase.

5. The method according to claim 1, wherein a potential of the one of the switch-on signals outputted by a gate line is about 15 V.

6. The method according to claim 1, wherein frequencies of the touch-driving signal and the touch-sensing signal are about 1 KHz to about 10 KHz.

7. The method according to claim 1, wherein a potential of the touch-driving signal is about 1 V to about 10 V.

8. The method according to claim 7, wherein the potential of the touch-driving signal is about 5 V.

9. The method according to claim 1, wherein a potential of the touch-sensing signal is about 1 V to about 5 V.

10. The method according to claim 9, wherein the potential of the touch-sensing signal is about 3 V.

11. The method according to claim 1, wherein the one of the switch-on signals is a high-potential signal.

12. An array substrate, comprising:

a plurality of gate lines arranged along a column direction;

a plurality of data lines arranged along a row direction, two adjacent data lines forming a data line group;

a plurality of subpixel units, each having a corresponding data line and a corresponding gate line, each subpixel unit including a pixel electrode and a common electrode; and

a plurality of thin-film transistors (TFTs), each connecting one subpixel unit with the corresponding gate line and the corresponding data line, wherein;

the plurality of gate lines sequentially transmit switch-on signals row by row, and a duration of one of the switch-on signals is divided into a first phase and a second phase with respect to time;

the first phase and the second phase are non-overlapping with respect to time, a combination of the first phase and the second phase corresponds to the duration of the one of the switch-on signals on the single one of the gate lines;

in the first phase of the one of the switch-on signals, a first data line in each data line group transmits a touch-driving signal to a pixel electrode corresponding to the gate line, and a second data line in each data line group transmits a touch-sensing signal; and

in the second phase of the one of the switch-on signals, the first data lines and the second data lines in the data line groups simultaneously transmit display signals to charge subpixel units corresponding to the gate line for displaying an image, a first data line in each data line group transmitting the touch-driving signal and the display signal respectively in the duration of the one of the switch-on signals, and a second data line in each data line group transmitting the touch-sensing signal and the display signal respectively in the duration of the one of the switch-on signals.

13. The array substrate according to claim 12, wherein a common electrode in a subpixel unit is connected to a common electrode line shared by subpixel units in a same column.

14. The array substrate according to claim 12, wherein common electrodes included in subpixels of a same row are independent of each other.

15. The array substrate according to claim 12, wherein the subpixel units are liquid crystal subpixel units.

16. A touch screen, including one or more of the array substrates according to claim 12.

17. The touch screen according to claim 16, further including a processor, the processor is configured to sequentially send the switch-on signals to the gate lines row by row along the column direction.

18. The touch screen according to claim 17, wherein the processor is further configured to:

in the first phase, send the touch-driving signal to the first data line in each data line group, receive the touch-sensing signal through the second data line in each data line group, and construct a fingerprint pattern based on touch-sensing signals; and

in the second phase, simultaneously send the display signals to the first data lines and the second data lines in the data line groups to charge the subpixel units corresponding to the gate line for displaying the image.

19. The touch screen according to claim 18, wherein the first phase is for fingerprint recognition and the second phase is for display charging of the subpixel units.

20. A display apparatus, including one or more of the touch screens according to claim 16.