Test Device Coordinate-Based Retesting for Liquid Crystal Panels
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Solution Overview
Problem
The existing point measurement methods for liquid crystal panels and LED chips are inefficient due to the need for retesting abnormal pixel units or crystal grains, which can be caused by test device errors rather than manufacturing issues, leading to wasted time and reduced efficiency.
Innovation Solution
A test method and device that acquires coordinates of test points, performs initial and secondary tests, and adjusts the probe position based on test results to determine if the abnormalities are due to the test device or manufacturing process, allowing for efficient movement between test points without requiring additional hardware improvements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If retesting is performed on all abnormal pixel units or crystal grains, then measurement accuracy is improved, but measurement time increases and efficiency decreases
Solution Approach 1:
The patent segments the retesting process by dividing abnormal test points into two categories: those requiring retesting (with coordinates recorded) and those that can proceed normally. This segmentation allows the system to selectively apply retesting only where necessary, rather than uniformly retesting all abnormal points, thereby reducing overall measurement time while maintaining accuracy for critical cases.
Solution Approach 2:
The patent implements preliminary action by recording coordinates of abnormal test points during the first measurement pass and preparing a retesting sequence in advance. This preliminary preparation enables the mechanical arm to efficiently navigate to retest points without unnecessary movements, optimizing the retesting process and reducing time loss.
2Measurement precision
If retesting is performed on abnormal pixel units or crystal grains, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by using the same measurement system and mechanical arm for both initial testing and retesting operations. The system maintains a unified coordinate recording and control mechanism that serves dual purposes: identifying abnormal points during initial measurement and guiding retesting operations, thereby avoiding the need for separate dedicated retesting equipment and reducing overall device complexity.
Solution Approach 2:
The patent uses copying by recording the coordinates of abnormal test points during the first measurement and using these recorded coordinates to guide the retesting process. This copying approach allows the system to replicate the measurement process at specific locations without requiring additional hardware, maintaining simplicity while ensuring accuracy.
3Measurement precision
If mechanical arm performs retesting according to abnormal measurement sequence, then measurement accuracy is improved, but productivity decreases
Solution Approach 1:
The patent implements preliminary action by pre-recording coordinates of abnormal test points and preparing an optimized retesting sequence before the actual retesting begins. This preliminary preparation allows the mechanical arm to execute retesting operations efficiently with minimal positioning adjustments, significantly reducing the time penalty associated with retesting and improving overall productivity.
Solution Approach 2:
The patent maintains continuity of useful action by integrating the retesting process into the overall measurement workflow. The system continuously operates by transitioning from initial measurement to retesting without complete interruption, using recorded coordinates to guide seamless transitions between test points, thereby minimizing idle time and maintaining high productivity.
Data Source
AI summary
The present application provides a test method and a test device, the test method includes: acquiring a coordinate of a test point of a sample to be tested; driving a probe to a position corresponding to the coordinate of the test point to perform a test according to the coordinate of the test point of the sample to be tested, and acquiring a first test result; determining whether the first test result is within a preset range or not; retesting on the position corresponding to the coordinate of the test point and acquiring a second test result, if the first test result is beyond a preset range; and driving the probe to a next test point in the sample to be tested to perform a test according to a preset test mode, after acquiring the second test result.