# US 10,311,764 B2 · Detection device and detection method of a GOA circuit of a display panel

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- Number: US 10,311,764 B2
- Document ID: US10311764B2
- Status: Granted
- Kind: B2
- Application number: 14/801,952
- Filed: 2015-07-17
- Published: 2016-09-29
- Granted: 2019-06-04
- Earliest claimed: 2015-03-26
- Assignees: Boe Technoloy Group Co., Ltd.; Boe (Hebei) Mobile Display Technology Co., Ltd.
- Applicants: Boe Technology Group Co., Ltd.; Boe (Hebei) Mobile Display Technology Co., Ltd.
- Inventors: Zhen Wu; Baohong Zhu; Xing Li; Jiayin Wang; Guowen Yang
- Web page: https://patentgrep.com/patent/US10311764B2

## CPC

- G09G 3/006: {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)}
- G01R 31/2894: {Aspects of quality control [QC] (G01R31/31718 takes precedence; program control for QC G05B19/41875)}
- G01R 31/44: Testing lamps
- G09G 3/3266: Details of drivers for scan electrodes
- G09G 3/3677: {suitable for active matrices only}
- G09G 2300/0408: Integration of the drivers onto the display substrate
- G09G 2310/0267: Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)

## 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.

## Claims

### 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 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.

### Claim 2 (depends on 1)

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.

### Claim 3 (depends on 1)

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.

### Claim 4 (depends on 1)

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.

### Claim 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.

### Claim 6 (depends on 5)

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.

### Claim 7 (depends on 5)

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.

### Claim 8 (depends on 5)

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.