Touch Control Substrate Series Circuit Test Method
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Solution Overview
Problem
Current large-size touch control screens face challenges in performing accurate touch control tests due to the small area of each terminal, leading to low reliability and inability to ensure precise connections during probe tests.
Innovation Solution
A touch control substrate with a touch control region, test regions, and cutting regions, featuring touch control electrodes, electrical connection members, and test terminals that form a series circuit, allowing for external power to create a series loop for testing, with specific segment configurations and switches to ensure accurate connection and insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional channel test is performed on bonding terminals at both ends of touch control electrodes, then the test can be conducted on large-size touch control screens, but the small area of each terminal makes it difficult to ensure accurate connection, resulting in low reliability
Solution Approach 1:
The patent divides the test substrate into multiple test regions, each containing multiple test electrodes. By segmenting the large-size touch control screen into smaller testable units with enlarged test electrodes, the system enables accurate probe connections while maintaining comprehensive test coverage across the entire screen.
Solution Approach 2:
The patent introduces test electrodes as intermediary elements between the probe equipment and the actual touch control electrodes. These test electrodes serve as mediators that facilitate accurate electrical connection and signal transmission, thereby improving measurement precision without affecting the original touch control functionality.
2Measurement precision
If the area of each terminal is increased to improve probe test accuracy, then measurement precision improves, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The test substrate is segmented into multiple test regions with multiple test electrodes per region. This segmentation allows the system to achieve accurate probe connections through distributed test points rather than requiring a single large terminal, thereby improving measurement precision while controlling structural complexity.
Solution Approach 2:
The patent combines multiple test electrodes within each test region to form a integrated test unit. This merging approach consolidates the testing function while maintaining individual electrode connections, reducing overall device complexity while preserving measurement accuracy.
3Reliability
If multiple test regions with multiple test electrodes are introduced, then measurement precision and test reliability improve, but the device complexity increases
Solution Approach 1:
The test electrodes and test regions are designed to serve multiple functions: they enable accurate probe testing, provide electrical connection pathways, and maintain structural integrity. This multi-functionality reduces the need for separate dedicated components, thereby improving test reliability while controlling device complexity.
Solution Approach 2:
The patent designs the test electrodes and connection structures to maintain equipotential relationships, ensuring uniform electrical characteristics across all test regions. This approach simplifies the electrical design and reduces complexity while maintaining consistent test reliability across the entire substrate.
Data Source
AI summary
The present application provides a touch control substrate, a test method thereof, and a manufacturing method of a touch control screen. The touch control substrate includes touch control electrodes, test terminals, and electrical connection members. Each of the test terminals is connected to two adjacent touch control electrodes. Each of the electrical connection members corresponds to each of the touch control electrodes. The touch control electrodes are electrically connected to the test terminals through the electrical connection members. The touch control electrodes form a series circuit through the corresponding electrical connection members and the corresponding test terminals.