Line Testing Device for Dense Array Substrates
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Solution Overview
Problem
Testing array substrates with a dense number of wires is challenging due to the small clearance between lines, which exceeds the resolution limit of typical testing devices, and interference between wires affects detection accuracy.
Innovation Solution
A line testing device with a signal generating and receiving system that moves perpendicular to the scan line, allowing for independent control and positioning of sensors to form a single circuit, reducing interference and improving detection precision by separating the signal input and output sensors and adjusting their position to avoid simultaneous detection of multiple circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a typical testing device is used to test array substrates with dense wires, then the device structure is simple, but the measurement precision deteriorates because the clearance between lines is too small and exceeds the resolution limit
Solution Approach 1:
The patent changes the movement direction of the signal generating device and signal receiving device from parallel to the scan line direction to perpendicular to the scan line direction. This dimensional change allows the sensors to approach the dense wires from a different spatial angle, effectively increasing the resolution capability without requiring higher magnification optics or more complex sensor structures.
Solution Approach 2:
The patent separates the signal generating device and signal receiving device into independently controllable units that can move along perpendicular directions. This segmentation allows precise positioning of each sensor relative to the wire being tested, enabling high-precision measurement while keeping each sensor unit relatively simple in structure.
2Measurement precision
If sensors are positioned close to dense wires for high precision detection, then measurement precision improves, but interference between wires increases and affects detection rate
Solution Approach 1:
By moving the sensors in a direction perpendicular to the scan line rather than parallel, the patent creates an optimal detection geometry that minimizes electromagnetic interference between adjacent wires. This perpendicular approach allows the sensors to detect signals from individual wires more cleanly, reducing cross-talk and improving the detection rate of problem lines.
Solution Approach 2:
The patent introduces a control device as an intermediary that independently controls the positioning of the signal generating device and signal receiving device. This intermediary control system enables precise positioning that maintains optimal detection distance and angle, thereby reducing wire-to-wire interference while preserving high detection precision.
3Adaptability or versatility
If the signal generating device and signal receiving device move parallel to the scan line direction, then the device complexity is low, but the adaptability deteriorates for testing different wiring patterns
Solution Approach 1:
The patent makes the control structure dynamic by introducing independent control capabilities for moving the signal generating device and signal receiving device along perpendicular directions. This dynamic control system can adapt its movement pattern to match different wiring configurations on the array substrate, greatly enhancing versatility while the modular design keeps the added complexity manageable.
Solution Approach 2:
By enabling movement in perpendicular directions with independent control, the patent creates a universal testing platform that can accommodate various wiring patterns and densities. The same device configuration can be adjusted to test different array substrate types, making the system multi-functional and highly adaptable without requiring multiple specialized devices.
Data Source
AI summary
A line testing device for an array substrate having a dense number of wires includes a signal generating device that generates a detection signal, a signal receiving device that receives and processes the detection signal, and a control device. The detection signal tests the array substrate having the dense number of wires, and the control device controls one or more of the signal generating device and the signal receiving device to move in a direction perpendicular to a direction of a scan line of the array substrate and in a plane parallel to the array substrate.