Electro-optical Device Bypass Line for Connection Failure Detection
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Solution Overview
Problem
In electro-optical devices, identifying and repairing connection failures in inter-substrate connection terminals is challenging due to the complexity of current paths and the difficulty in isolating defective terminals among multiple connections.
Innovation Solution
The electro-optical device incorporates a third line that bypasses inter-substrate connection terminals, allowing for sequential cutting of lines to form current paths that exclude specific terminals, enabling efficient identification of connection failures by altering the current path configuration and reducing noise through obtuse curve angles in the bypass lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If four inter-substrate connection terminals are provided in the four corners of the TFT substrate with series lines connecting them to external circuit terminals, then the device can function properly, but it becomes difficult to check whether display defects are improved and difficult to efficiently find the terminal with connection failure
Solution Approach 1:
The patent segments the current path by providing a bypass line that can be selectively cut to isolate individual inter-substrate connection terminals. This allows each terminal to be tested independently by cutting the bypass line at specific positions, enabling systematic diagnosis of connection failures without affecting the entire system.
Solution Approach 2:
The bypass line acts as an intermediary element that facilitates the detection process. By introducing this intermediate conductive path that can be selectively interrupted, the patent enables controlled isolation of terminals for diagnostic purposes, making the detection process systematic and efficient.
2Reliability
If multiple inter-substrate connection terminals are provided to ensure proper device function, then the device can operate reliably, but the complexity of the current paths increases making it difficult to isolate and test defective terminals
Solution Approach 1:
The patent divides the complex current path into manageable segments by providing a bypass line with multiple cut positions. Each segment can be independently tested by cutting the bypass line at the appropriate position, transforming a complex diagnostic problem into a series of simple, isolated tests.
Solution Approach 2:
The patent introduces dynamic controllability to the current path configuration through the bypass line design. By selectively cutting different portions of the bypass line, the current path can be dynamically reconfigured to include or exclude specific terminals, enabling flexible and systematic diagnostic procedures.
Data Source
AI summary
Inter-substrate connection terminals are provided between four corners of an opposed substrate and a TFT substrate. Lines are provided between first and second terminals in the TFT substrate and an external circuit connection terminal. Lines are provided between first and second terminals, between first and third terminals, between the third and fourth terminals, and between second and fourth terminals, respectively. Lines bypassing the first terminal are provided between lines. A line bypassing the second terminal is provided between lines.