Corner Electrode Spacing for LCD Trace Mura
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Solution Overview
Problem
Liquid Crystal Display (LCD) panels experience abnormal liquid crystal molecule rotation and the phenomenon of Trace mura due to external forces, which are hindered by electric fields, leading to slow or impossible restoration and degradation of display effects.
Innovation Solution
An electrode structure with a corner area and a middle area, featuring a smaller space and/or wider sub-electrodes in the corner area compared to the middle area, increasing the intensity of the electric field in the X direction and reducing the hindering effect of the Y direction electric field, facilitating the restoration of liquid crystals to their initial arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform electrode structure is used in corner area and middle area, then manufacturing is simple, but liquid crystal restoration is hindered in corner area under external force
Solution Approach 1:
The patent applies local quality by making the electrode structure in the corner area different from the middle area. Specifically, the distance between adjacent electrodes in the corner area is made smaller than in the middle area, creating locally differentiated electric field characteristics that facilitate liquid crystal restoration in the corner region where external forces are most likely to cause damage.
Solution Approach 2:
The patent introduces asymmetry by deliberately making the electrode spacing non-uniform across the display panel. The corner areas have different electrode spacing compared to the middle areas, creating asymmetric electric field distributions that are optimized for different functional requirements - uniform spacing in the middle for standard operation and non-uniform spacing in corners for enhanced restoration capability.
2Reliability
If electrode spacing is reduced in corner area, then liquid crystal restoration is facilitated, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies parameter changes by modifying the electrode spacing parameter specifically in the corner areas. By changing the distance between adjacent electrodes in corners to be smaller than in the middle areas, the patent creates enhanced electric fields that facilitate liquid crystal restoration while maintaining manufacturability through defined geometric parameters.
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 enhances the display effect by improving Trace mura and increasing transmissivity by ensuring that liquid crystals can restore to their initial arrangement after external forces are removed, thereby improving the overall display performance.
Implementation Method 1
an electric field in the X direction may be generated by a vertical electrode 10 in the corner area, and an electric field in the Y direction may be generated by a transverse electrode 11 in the corner area, so that liquid crystal molecules can be rotated
Implementation Method 2
liquid crystal molecules between the slit electrodes and above the electrodes in a liquid crystal cell can be rotated, to improve the operation efficiency of the liquid crystals and enhance the light transmission efficiency
Data Source
AI summary
An electrode structure having a corner area and a middle area is disclosed. The electrode structure includes at least two sub-electrodes, where at least one of a) a space between two adjacent sub-electrodes in the corner area is smaller than a space between the two adjacent sub-electrodes in the middle area, and b) at least one sub-electrode has a larger width in the corner area than a width of the sub-electrode in the middle area.