Detecting circuit, detecting method and display device

Patent metadata

Field	Value
Publication number	US-9898944-B2
Application number	US-201615159166-A
Country	US
Kind code	B2
Filing date	May 19, 2016
Priority date	Jul 20, 2015
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

The present invention provides a detecting circuit, a detecting method and a display device, and the detecting circuit includes data signal input buses, switching units and control units, wherein the data signal input buses are used to provide data signals to the data lines and a predetermined number of data lines corresponding to a central region of the display panel constitute a first data line group; the switching units are arranged between the data lines and corresponding data signal input buses, all of which are divided into two switching unit groups, and all switching units in correspondence with the data lines in the first data line group constitute a first switching unit group; and the control units are used to control all switching units of corresponding switching unit groups to be turned on or turned off simultaneously.

First claim

What is claimed is:

1. A detecting circuit used to perform a detection of crosstalk on a display panel, comprising:
a plurality of data signal input buses, which are used to provide data signals to corresponding data lines on the display panel, a predetermined number of data lines corresponding to a central region of the display panel constituting a first data line group;
a plurality of switching units, which have the same number as the data lines and correspond to the data lines one to one, the switching units being arranged between the data lines and corresponding data signal input buses, being used to control electrical connections between the data lines and the corresponding data signal input buses, all switching units being divided into at least two switching unit groups, and all switching units in correspondence with the data lines in the first data line group constituting a first switching unit group; and
a plurality of control units, which have the same number as the switching unit groups and correspond to the switching unit groups one to one, and are used to control all switching units of corresponding switching unit groups to be turned on or turned off simultaneously.

2. The detecting circuit according to claim 1 , wherein all switching units are divided into first and second switching unit groups, all switching units corresponding to the data lines of the first data line group constitute the first switching unit group and the remaining switching units constitute the second switching unit group;
the control units include a first control unit and a second control unit;
the first control unit is used to control all switching units of the first switching unit group to be turned on or turned off simultaneously; and
the second control unit is used to control all switching units of the second switching unit group to be turned on or turned off simultaneously.

3. The detecting circuit according to claim 1 , wherein all switching units are divided into first, second and third switching unit groups;
all switching units corresponding to the data lines of the first data line group constitute the first switching unit group, all switching units corresponding to the data lines which correspond to a peripheral region at one side of the central region of the display panel constitute the second switching unit group, and all switching units corresponding to the data lines which correspond to a peripheral region at the other side of the central region of the display panel constitute the third switching unit group;
the control units include a first control unit, a second control unit and a third control unit;
the first control unit is used to control all switching units of the first switching unit group to be turned on or turned off simultaneously;
the second control unit is used to control all switching units of the second switching unit group to be turned on or turned off simultaneously; and
the third control unit is used to control all switching units of the third switching unit group to be turned on or turned off simultaneously.

4. The detecting circuit according to claim 1 , wherein the switching unit comprises a transistor; and
a control electrode of the transistor is connected to the corresponding control unit, a first electrode of the transistor is connected to the corresponding data line, and a second electrode of the transistor is connected to the corresponding data signal input bus.

5. A detecting method used to perform a detection of crosstalk on a display panel and based on a detecting circuit, wherein the detecting circuit is the detecting circuit according to claim 2 , and the detecting method comprises:
in a first stage, all switching units of the first switching unit group are controlled to be turned on simultaneously by the first control unit, and all switching units of the second switching unit group are controlled to be turned on simultaneously by the second control unit;
in a second stage, all switching units of the first switching unit group are controlled to be turned off simultaneously by the first control unit, and all switching units of the second switching unit group are controlled to be turned on simultaneously by the second control unit; and
in a third stage, all switching units of the first switching unit group are controlled to be turned on simultaneously by the first control unit, and all switching units of the second switching unit group are controlled to be turned on simultaneously by the second control unit.

6. A detecting method used to perform a detection of crosstalk on a display panel and based on a detecting circuit, wherein the detecting circuit is the detecting circuit according to claim 2 , and the detecting method comprises:
in a first stage, all switching units of the first switching unit group are controlled to be turned off simultaneously by the first control unit, and all switching units of the second switching unit group are controlled to be turned off simultaneously by the second control unit;
in a second stage, all switching units of the first switching unit group are controlled to be turned on simultaneously by the first control unit, and all switching units of the second switching unit group are controlled to be turned off simultaneously by the second control unit; and
in a third stage, all switching units of the first switching unit group are controlled to be turned off simultaneously by the first control unit, and all switching units of the second switching unit group are controlled to be turned off simultaneously by the second control unit.

7. A detecting method used to perform a detection of crosstalk on a display panel and based on a detecting circuit, wherein the detect circuit is the detect circuit according to claim 3 , and the detecting method comprises:
in a first stage, all switching units of the first switching unit group are controlled to be turned on simultaneously by the first control unit, all switching units of the second switching unit group are controlled to be turned on simultaneously by the second control unit, and all switching units of the third switching unit group are controlled to be turned on simultaneously by the third control unit;
in a second stage, all switching units of the first switching unit group are controlled to be turned off simultaneously by the first control unit, all switching units of the second switching unit group are controlled to be turned on simultaneously by the second control unit, and all switching units of the third switching unit group are controlled to be turned on simultaneously by the third control unit; and
in a third stage, all switching units of the first switching unit group are controlled to be turned on simultaneously by the first control unit, all switching units of the second switching unit group are controlled to be turned on simultaneously by the second control unit, and all switching units of the third switching unit group are controlled to be turned on simultaneously by the third control unit.

8. A detecting method used to perform a detection of crosstalk on a display panel and based on a detecting circuit, wherein the detecting circuit is the detecting circuit according to claim 3 , and the detecting method comprises:
in a first stage, all switching units of the first switching unit group are controlled to be turned off simultaneously by the first control unit, all switching units of the second switching unit group are controlled to be turned off simultaneously by the second control unit, and all switching units of the third switching unit group are controlled to be turned off simultaneously by the third control unit;
in a second stage, all switching units of the first switching unit group are controlled to be turned on simultaneo

Assignees

• Boe Technology Group Co Ltd
• Boe Hebei Mobile Display Technology Co Ltd

Inventors

• Li Liliang
• Wang Guiyun
• Yang Guowen
• Li Gang
• Liao Yongjun

Classifications

• G01R31/2825

  in household appliances or professional audio/video equipment (testing LAN's H04L43/50; testing TV systems H04N17/00; testing loudspeakers H04R29/00) · CPC title

• G09G2320/0209

  Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display · CPC title

• G09G3/006 Primary

  Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309) · CPC title

• G09G3/3611

  Control of matrices with row and column drivers · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title