ARRAY SUBSTRATE, TOUCH SCREEN AND DISPLAY APPARATUS CONTAINING THE SAME, AND METHOD FOR DRIVING THE SAME

• US 20170177111A1
• Filed: 12/28/2015
• Published: 06/22/2017
• 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
• Granted Patent: US 10,209,836 B2
• Time in Patent Office: 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

1-20. -20. (canceled)

21. 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 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, wherein;

in the first phase of each switch-on signal, sending a touch-driving signal by the processing unit 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 by the processing unit, and constructing a fingerprint pattern based on touch-sensing signals by the processing unit; and

in the second phase of each switch-on signal, simultaneously sending display signals by the processing unit 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.

22. The method according to claim 21, wherein:

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

23. The method according to claim 21, wherein a duration of the switch-on signal is about 6.5 μ

s.

24. The method according to claim 21, wherein a duration of the first phase is longer than a duration of the second phase.

25. The method according to claim 21, wherein the switch-on signal outputted by a gate line is about 15 V.

26. The method according to claim 21, wherein frequencies of the touch-driving signal and the touch-sensing signal are about 1 KHz to about 10 KHz.

27. The method according to claim 21, wherein a potential of the touch-driving signal is about 1 V to about 10 V.

28. The method according to claim 27, wherein the potential of the touch-driving signal is about 5 V.

29. The method according to claim 21, wherein a potential of the touch-sensing signal is about 1 V to about 5 V.

30. The method according to claim 29, wherein the potential of the touch-sensing signal is about 3 V.

31. The method according to claim 21, wherein the switch-on signal is a high-potential signal.

32. 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.

33. The array substrate according to claim 32, wherein a common electrode in a subpixel unit is connected to a common electrode line shared by subpixel units in a same column.

34. The array substrate according to claim 32, wherein common electrodes included in subpixels of a same row are independent of each other.

35. The array substrate according to claim 32, wherein the subpixel units are liquid crystal subpixel units.

36. A touch screen, including one or more of the array substrates according to claim 32.

37. The touch screen according to claim 36, further including a processing unit, the processing unit sequentially sending a switch-on signal to each gate line row by row along a column direction, the switch-on signal being provided through a first phase and a second phase.

38. The touch screen according to claim 37, wherein:

in the first phase of each switch-on signal, the processing unit sends a touch-driving signal to pixel electrodes corresponding to the gate line through a first data line in each data line group, receives a touch-sensing signal through a second data line in each data line group, and constructs a fingerprint pattern based on touch-sensing signals; and

in the second phase of each switch-on signal, the processing unit simultaneously sends 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.

39. The touch screen according to claim 38, wherein the first phase is for fingerprint recognition and the second phase is for display charging of the subpixel units.

40. A display apparatus, including one or more of the touch screens according to claim 36.