Source Driver Circuit Board Self-Test for High Temperature Humidity
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Solution Overview
Problem
Existing external test circuit boards and logic boards used in high temperature and high humidity tests for liquid crystal display panels have poor resistance, leading to frequent damage and increased costs during the manufacturing process.
Innovation Solution
A detection method where a picture is stored in the source driver circuit board of a display panel, with a power source board and clock signal generation circuit connected directly to the source driver circuit board, eliminating the need for external test circuit boards and logic boards, thereby enhancing resistance to high temperature and high humidity conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external test circuit boards are used to provide picture and clock signals during high temperature and high humidity tests, then the display panel can be tested, but the external test circuit boards are easily damaged due to poor resistance to high temperature and high humidity
Solution Approach 1:
The patent merges the functions of external test circuit boards (picture signal generation, clock signal generation, and power supply) into the display panel's own source driver circuit board. The source driver circuit board stores the picture signal in its internal memory and generates both clock and power signals, eliminating the need for separate external test equipment and improving resistance to high temperature and high humidity conditions.
Solution Approach 2:
The display panel performs self-testing by utilizing its own source driver circuit board to store picture signals, generate clock signals, and provide power signals during high temperature and high humidity tests. This self-service approach eliminates dependency on external test equipment that is vulnerable to environmental stress, allowing the panel to test itself under adverse conditions without external assistance.
2Reliability
If multiple external test circuit boards are used for detection, then comprehensive testing can be performed, but equipment costs and maintenance costs increase
Solution Approach 1:
The patent combines multiple testing functions (picture signal provision, clock signal generation, power supply) into a single integrated source driver circuit board that is already part of the display panel. This eliminates the need for multiple separate external test circuit boards, thereby reducing equipment investment costs and maintenance expenses while maintaining comprehensive testing capability.
Solution Approach 2:
The source driver circuit board is designed to perform multiple functions: storing picture signals in its memory, generating clock signals, and providing power signals during testing. This multi-functionality replaces what previously required multiple specialized external devices, reducing overall system complexity and cost while maintaining full testing coverage.
3Reliability
If external test circuit boards are connected to the display panel for detection, then the display panel can be tested under high temperature and high humidity conditions, but the detection process becomes complex
Solution Approach 1:
The patent extracts the testing functions from external test circuit boards and relocates them directly into the display panel's source driver circuit board. By taking out the picture storage, clock signal generation, and power signal provision functions from external equipment and embedding them within the panel itself, the detection process is simplified while maintaining high temperature and high humidity resistance.
Data Source
AI summary
The present application discloses a detection method for a display panel and a detection apparatus for a display panel. The detection method includes the following steps: storing a picture for detection in a source driver circuit board of a display panel; electrically connecting a power source board generating a power source signal directly to the source driver circuit board.