GOA Circuit Detection Device Using Waveform Analysis
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Solution Overview
Problem
The existing methods for testing GOA circuits in display panels are inefficient and prone to misjudgment as they require manually observing displayed images and supplying data signals, which complicates the detection process.
Innovation Solution
A detection device and method that supplies a test signal to the GOA circuit, specifically to the initial and distal GOA units, to determine if there are output signals and compare waveform parameters to assess circuit abnormalities, eliminating the need to manually evaluate all units and reducing misjudgment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional testing methods are used to test the GOA circuit by lighting up the display panel and supplying data signals for manual observation, then the testing can be performed, but the detection efficiency is low and misjudgment is easy to occur
Solution Approach 1:
The patent replaces the manual mechanical observation system with an automated electronic detection system. The detection device automatically supplies test signals, acquires output signals from GOA units, and processes the signals to determine circuit abnormalities, eliminating the need for manual visual inspection of displayed images.
Solution Approach 2:
The detection device performs self-testing by automatically supplying test signals to the GOA circuit, acquiring output signals, and processing the signals to determine abnormalities without requiring external manual intervention for signal supply and result judgment.
2Reliability
If all GOA units are tested individually to ensure complete coverage, then the detection comprehensiveness is improved, but the detection time and complexity increase significantly
Solution Approach 1:
The patent extracts and tests only the critical GOA units (initial unit and distal unit) rather than testing all units. This selective approach identifies the most important test points that, when functioning correctly, indicate the overall circuit is operating properly, thereby reducing detection time while maintaining reliability.
Solution Approach 2:
Instead of performing complete testing of all GOA units, the patent applies partial action by testing only the essential initial and distal units. This partial testing approach is sufficient to detect circuit abnormalities without the time cost of exhaustive testing of every unit.
3Device complexity
If manual judgment is used to assess the GOA circuit based on displayed images, then the process can be performed with simple equipment, but the detection accuracy decreases and is prone to errors
Solution Approach 1:
The patent replaces the simple but inaccurate manual visual inspection system with an automated electronic signal processing system. The detection device supplies test signals, acquires output signals, and processes them electronically to determine circuit abnormalities, significantly improving detection accuracy over manual methods.
Solution Approach 2:
The patent introduces an intermediary detection device that acts as a mediator between the GOA circuit and the assessment process. This device supplies test signals, acquires output signals, and processes the signals to determine abnormalities, providing an objective and accurate assessment without direct manual intervention.
Data Source
AI summary
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.