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

Patent metadata

Field	Value
Publication number	US-10311764-B2
Application number	US-201514801952-A
Country	US
Kind code	B2
Filing date	Jul 17, 2015
Priority date	Mar 26, 2015
Publication date	Jun 4, 2019
Grant date	Jun 4, 2019

Abstract

A detection device of a GOA circuit of a display panel includes a signal supply unit for supplying a test signal to the GOA circuit; an acquisition unit for determining whether each of the GOA units in the 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, the GOA unit group at least includes an initial GOA unit and a distal GOA unit of the GOA circuit; 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

The invention claimed is:

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 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, the GOA unit group at least comprises an initial GOA unit and a distal GOA unit of the GOA circuit;
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,
a signal input welding plate for connecting an input terminal of the GOA circuit,
a signal output welding plate for connecting an output terminal of each of the GOA units in the GOA unit group,
wherein the signal supply unit is used for supplying the test signal to the GOA circuit through the signal input welding plate; 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, and
wherein the processing unit is used for: comparing waveform parameters, at least including period, level amplitude, and high level retention time, of each waveform of the acquired output signals of the GOA units with corresponding waveform parameters of other waveforms of the acquired output signals of the GOA units one by one, and determining that the GOA circuit is abnormal if the waveform parameters of the acquired output signals of the GOA units are inconsistent; determining that the GOA circuit is normal if the waveform parameters of the acquired output signals of the GOA units are consistent.

2. The detection device as claimed in claim 1 , wherein the acquisition unit is further used for:
determining that the GOA circuit is abnormal if each of the GOA unit in the GOA unit group does not have an output signal.

3. 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 digital signal respectively.

4. 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 unit.

5. A detection method of a GOA circuit of a display panel,
using a 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,
a signal input welding plate for connecting an input terminal of the GOA circuit,
a signal output welding plate for connecting an output terminal of each of the GOA units in the GOA unit group,

wherein the signal supply unit is used for supplying the test signal to the GOA circuit through the signal input welding plate; 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
the detection method comprising:
connecting the input terminal of the GOA circuit with the signal input welding plate;
supplying a test signal to the GOA circuit through the signal input welding plate;
determining whether each of a plurality of GOA units in a GOA unit group of the GOA circuit has an output signal through the signal output welding plate; 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,
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 waveform parameters, at least including period, level amplitude, and high level retention time, of each waveform of the acquired output signals of the GOA units with corresponding waveform parameters of other waveforms of the acquired output signals of the GOA units one by one, and determining that the GOA circuit is abnormal if the waveform parameters of the acquired output signals of the GOA units are inconsistent; determining that the GOA circuit is normal if the waveform parameters of the acquired output signals of the GOA units are consistent.

6. The detection method as claimed in claim 5 , further comprising:
determining that the GOA circuit is abnormal if each of the GOA unit in the GOA unit group does not have an output signal.

7. The detection method as claimed in claim 5 , further comprising converting the acquired output signal of each of the GOA units in the GOA unit group into a digital signal respectively.

8. The detection method as claimed in claim 5 , further comprising: displaying a waveform of the test signal and a waveform of the acquired output signal of each of the GOA unit.

Assignees

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

Inventors

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

Classifications

• 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

• G09G3/3266

  Details of drivers for scan electrodes · CPC title

• G09G3/3677

  suitable for active matrices only · CPC title

• G09G2310/0267

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