Detection device and detection method of a goa circuit of a display panel

Patent metadata

Field	Value
Publication number	US-2016284259-A1
Application number	US-201514801952-A
Country	US
Kind code	A1
Filing date	Jul 17, 2015
Priority date	Mar 26, 2015
Publication date	Sep 29, 2016
Grant date	—

Abstract

A detection device and a detection method of a GOA circuit of a display panel are disclosed. The detection device includes a signal supply unit for supplying a test signal to the GOA circuit; and an acquisition unit for determining whether each of the GOA units in the GOA unit group of the GOA circuit has an output signal, and if there is an output signal, acquiring the output signal of each of the GOA units in the GOA unit group. Part of the GOA units in the GOA circuit constitute the GOA unit group. The GOA unit group at least includes an initial GOA unit and a distal GOA unit of the GOA circuit. The detection device also includes a processing unit for determining whether the GOA circuit is abnormal based on the acquired output signal of each of the GOA units in the GOA unit group.

First claim

1 . A detection device of a GOA circuit of a display panel, the detection device comprising:
a signal supply unit for supplying a test signal to the GOA circuit; an acquisition unit for determining whether each of a plurality of GOA units in a GOA unit group of the GOA circuit has an output signal, wherein if there is an output signal, acquiring the output signal of each of the GOA units in the GOA unit group, wherein part of the GOA units in the GOA circuit constitute the GOA unit group, and wherein the GOA unit group at least comprises an initial GOA unit and a distal GOA unit of the GOA circuit; and a processing unit for determining whether the GOA circuit is abnormal based on the acquired output signal of each of the GOA units in the GOA unit group.

2 . The detection device as claimed in claim 1 , wherein an input terminal of the GOA circuit is connected with a signal input welding plate,
wherein an output terminal of each of the GOA units in the GOA unit group is connected with a signal output welding plate, wherein the signal supply unit is used for supplying the test signal to the GOA circuit through the signal input welding plate, and wherein the acquisition unit is used for determining whether there is an output signal in each of the GOA units in the GOA unit group of the GOA circuit through the signal output welding plate, and acquiring the output signal of each of the GOA units in the GOA unit group.

3 . The detection device as claimed in claim 2 , wherein the acquisition unit is further used for:
determining that the GOA circuit is abnormal if any of the GOA units in the GOA unit group does not have an output signal.

4 . The detection device as claimed in claim 1 , wherein the processing unit is used for:
comparing waveforms of the acquired output signals of the GOA units, and determining that the GOA circuit is abnormal if the waveform parameters of the acquired output signals of the GOA units are inconsistent, and determining that the GOA circuit is normal if the waveform parameters of the acquired output signals of the GOA units are consistent.

5 . The detection device as claimed in claim 4 , wherein the waveform parameters at least include period, level amplitude, and high level retention time.

6 . The detection device as claimed in claim 1 , wherein the detection device further comprises a conversion unit for converting the acquired output signal of each of the GOA units in the GOA unit group into a respective digital signal.

7 . The detection device as claimed in claim 1 , wherein the detection device further comprises a display unit for displaying a waveform of the test signal and a waveform of the acquired output signal of each of the GOA units.

8 . A detection method of a GOA circuit of a display panel, the detection method comprising:
supplying a test signal to the GOA circuit; determining whether each of a plurality of GOA units in a GOA unit group of the GOA circuit has an output signal; if there is an output signal, acquiring the output signal of each of the GOA units in the GOA unit group; wherein part of the GOA units in the GOA circuit constitute the GOA unit group, and wherein the GOA unit group at least comprises an initial GOA unit and a distal GOA unit of the GOA circuit; and determining whether the GOA circuit is abnormal based on the acquired output signal of each of the GOA units in the GOA unit group.

9 . The detection method as claimed in claim 8 , wherein an input terminal of the GOA circuit is connected with a signal input welding plate,
wherein an output terminal of each of the GOA units in the GOA unit group is connected with a signal output welding plate, and wherein the detection method further comprises: supplying the test signal to the GOA circuit through the signal input welding plate; determining whether there is an output signal in each of the GOA units in the GOA unit group of the GOA circuit through the signal output welding plate; and acquiring the output signal of each of the GOA units in the GOA unit group.

10 . The detection method as claimed in claim 9 , further comprising:
determining that the GOA circuit is abnormal if any of the GOA units in the GOA unit group does not have an output signal.

11 . The detection method as claimed in claim 8 , wherein the step of determining whether the GOA circuit is abnormal based on the acquired output signal of each of the GOA units in the GOA unit group comprises:
comparing waveforms of the acquired output signals of the GOA units, and determining that the GOA circuit is abnormal if the waveform parameters of the acquired output signals of the GOA units are inconsistent; and determining that the GOA circuit is normal if the waveform parameters of the acquired output signals of the GOA units are consistent.

12 . The detection method as claimed in claim 11 , wherein the waveform parameters at least include period, level amplitude, and high level retention time.

13 . The detection method as claimed in claim 8 , further comprising converting the acquired output signal of each of the GOA units in the GOA unit group into a respective digital signal.

14 . The detection method as claimed in claim 8 , further comprising: displaying a waveform of the test signal and a waveform of the acquired output signal of each of the GOA units.

Assignees

• Boe Technology Group Co Ltd
• Boe (Hebei) Mobile Display Tech Co Ltd

Inventors

• Wu Zhen
• Zhu Baohong
• Li Xing
• Wang Jiayin
• Yang Guowen

Classifications

• G09G3/3677

  suitable for active matrices only · CPC title

• G09G3/3266

  Details of drivers for scan electrodes · CPC title

• G01R31/2894

  Aspects of quality control [QC] (G01R31/31718 takes precedence; program control for QC G05B19/41875) · CPC title

• G01R31/44

  Testing lamps · CPC title

• G09G2310/0267

  Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays · CPC title