Display Panel Signal Line Defect Detection via Floating State
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Solution Overview
Problem
In large display devices, the increased density of signal lines leads to signal interference, making it difficult to precisely determine whether adjacent signal lines are shorted or opened, as their waveforms become similar due to proximity.
Innovation Solution
The display panel design alternates between coupling signal lines to main transmission lines and maintaining others in a floating state, allowing for different electrical connections and resistances, enabling precise detection of shorted or open signal lines by analyzing output test signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If signal lines are densely formed to increase the number of signal lines in proportion to display device size, then the quantity of signal lines is improved, but signal interference between adjacent signal lines occurs making defect detection difficult
Solution Approach 1:
The patent applies local quality by creating different electrical connection states for different signal lines. Specifically, odd-numbered signal lines are connected to main transmission lines while even-numbered signal lines are maintained in floating states. This local differentiation creates distinct resistance characteristics for adjacent signal lines, enabling precise defect detection despite high density configuration.
2Area of stationary object
If signal lines are arranged adjacently to increase density, then the area occupied by signal lines is reduced, but signal waveforms become similar due to interference
Solution Approach 1:
The patent implements asymmetry by creating an alternating pattern where odd-numbered signal lines have one electrical connection configuration (connected to main transmission lines) and even-numbered signal lines have a different configuration (floating state). This asymmetric arrangement ensures that adjacent signal lines have different resistance values, maintaining waveform distinction and preventing information loss despite reduced spacing.
3Ease of manufacture
If all signal lines are maintained in the same electrical state, then the manufacturing process is simplified, but adjacent signal lines have similar resistance making short and open detection difficult
Solution Approach 1:
The patent applies segmentation by dividing the signal lines into two distinct groups: odd-numbered signal lines connected to main transmission lines and even-numbered signal lines in floating states. This segmentation creates measurable resistance differences between adjacent lines, enabling precise defect detection while maintaining a relatively simple manufacturing process through systematic alternating connection patterns.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design effectively eliminates signal interference by creating distinct resistance differences between adjacent signal lines, allowing for accurate determination of shorted or open lines through test signal analysis, even in densely packed configurations.
Implementation Method 1
increases the difference in resistance between the adjacent signal lines and eliminates signal interference between the adjacent signal lines
Data Source
AI summary
A display panel for display devices which enables precisely determining whether or not adjacent signal lines are shorted or opened and a method for detecting defects of the signal lines are disclosed. The display panel includes a substrate on which a plurality of signal lines to transmit various signals required by pixels is formed, and one of any two adjacent signal lines is connected to at least one of main signal transmission lines and the other one of the two adjacent signal lines is maintained in a floating state.