Display Panel Test Pad Reuse as Alignment Mark
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Solution Overview
Problem
The accuracy of Visible Test (VT) signals for display panels is compromised due to poor contact between test circuit boards and display panels during the testing process, leading to potential defects in the testing process.
Innovation Solution
Incorporating test leads and test pads directly on the display panel, where test pads are reused as alignment marks and circuit board alignment marks, allowing for improved electrical connections and reduced complexity in test circuit boards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a test circuit board is pressed onto the pin on the display panel to perform VT test, then the test signal can be acquired, but poor contact may occur which adversely affects the accuracy of the test signal
Solution Approach 1:
The patent extracts the test signal acquisition function from the test circuit board and integrates it directly into the display panel through dedicated test leads and test pads. This separation allows the test circuit board to focus on signal generation while the display panel handles signal acquisition, eliminating contact reliability issues between the two components.
Solution Approach 2:
The test pad on the display panel serves multiple functions: it acts as both a test signal acquisition point and a circuit board alignment mark. This multi-functionality reduces the number of separate components needed and simplifies the testing process while maintaining high measurement precision.
2Adaptability or versatility
If test circuit board is used for VT test, then test signal can be provided and acquired, but the structure and space requirements of test circuit board increase
Solution Approach 1:
The patent extracts the test signal acquisition function from the test circuit board and integrates it directly into the display panel through dedicated test leads and test pads. This separation allows the test circuit board to focus on signal generation while the display panel handles signal acquisition, eliminating contact reliability issues between the two components.
Solution Approach 2:
The test pad on the display panel serves multiple functions: it acts as both a test signal acquisition point and a circuit board alignment mark. This multi-functionality reduces the number of separate components needed and simplifies the testing process while maintaining high measurement precision.
Data Source
AI summary
The present disclosure relates to the field of display technologies and provides a display panel and a display apparatus for improving the accuracy of test signals acquired in a VT test. The display panel includes a base substrate. The base substrate is provided with a plurality of test leads in a non-display area, and the plurality of test leads includes a circuit board lead and a test point lead. The base substrate is also provided with a test pad and a test circuit board pin in the non-display area. The circuit board lead is electrically connected to the test circuit board pin, the test point lead is electrically connected to the test pad, and the test pad being reused as a circuit board alignment mark.