Liquid Crystal Device Peripheral Electrode Layout
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Solution Overview
Problem
In liquid crystal devices, ionic impurities can cause electrostatic breakdown and display defects due to the intersection of signal lines, leading to decreased yield and display quality issues.
Innovation Solution
The liquid crystal device design includes a peripheral electrode line that does not intersect with data signal supply lines and scan signal supply lines, with a third connection terminal connected to the peripheral electrode line positioned between first and second connection terminals, preventing electrostatic breakdown and allowing adequate voltage application to the pixel peripheral electrode, thus suppressing display unevenness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the peripheral electrode line intersects with data signal supply lines or scan signal supply lines, then the manufacturing process becomes simpler, but electrostatic breakdown occurs between lines causing defects
Solution Approach 1:
The patent introduces a third dimension (vertical stacking) to resolve the line intersection problem. Instead of routing all lines in the same plane where they would intersect, the peripheral electrode line is placed in a different layer (dimension) from the data signal supply lines and scan signal supply lines. This dimensional separation eliminates electrostatic breakdown risks while maintaining manufacturing simplicity, as the lines can still be connected through vertical vias without complex planar routing adjustments.
2Reliability
If the peripheral electrode line does not intersect with signal lines, then electrostatic breakdown is prevented, but the layout complexity increases
Solution Approach 1:
The patent segments the electrode system into distinct functional layers: the peripheral electrode line is separated from the signal transmission lines (data signal supply lines and scan signal supply lines). This segmentation allows each component to be optimized independently - the peripheral electrode line for electrostatic protection and the signal lines for data transmission - without interference, reducing overall layout complexity while maintaining high reliability.
3Ease of manufacture
If ionic impurities are present in the liquid crystal layer, then the liquid crystal injection process becomes simpler, but display quality deteriorates due to impurity cohering in pixel regions
Solution Approach 1:
The patent introduces the peripheral electrode line as an intermediary component between the seal member and the pixel electrodes. This intermediary structure actively manages ionic impurities by providing collection points (through the peripheral electrodes connected to potential control circuits) that attract and hold impurities, preventing them from migrating into and cohering in the pixel regions. This allows simpler injection processes while maintaining high display quality.
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 prevents electrostatic breakdown and noise interference, enhancing display quality by ensuring the peripheral electrode line does not intersect with signal lines, thereby maintaining the pixel region's integrity and reducing defects.
Implementation Method 1
the peripheral electrode line is disposed so as not to planarly intersect with at least a part of the lines among the plurality of data signal supply lines and the plurality of scan signal supply lines
Data Source
AI summary
A liquid crystal device including a first connection terminal electrically connected to a first signal supply line that supplies a signal to a data line driving circuit, a second connection terminal electrically connected to a second signal supply line that supplies a signal to a scanning line driving circuit, and a third connection terminal electrically connected to a peripheral electrode line, which is electrically connected to a pixel peripheral electrode disposed between a pixel region and the scanning line driving circuit, and between the pixel region and the data line driving circuit. The third connection terminal is disposed between the first connection terminal, and the second connection terminal. The peripheral electrode line is disposed so as not to planarly intersect with at least a partial line of a first signal supply line and the second signal supply line.