Auxiliary Electrodes for Liquid Crystal Panel Dark Line Reduction
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Solution Overview
Problem
Segment liquid crystal panels in normally-black mode with tessellated pixel arrays face issues with dark line formation due to misalignment of liquid crystal molecules, which existing electrode structures fail to adequately address, especially when trying to reduce dark lines between hexagonal pixels.
Innovation Solution
A liquid crystal panel design featuring a substrate configuration with auxiliary electrodes that overlap gaps between adjacent pixels, made of transparent electroconductive material, and connected to both pixels to facilitate aligned liquid crystal molecule alignment, reducing dark line formation by applying signal voltage simultaneously to all pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If pixels are arrayed in tessellation in an active region to achieve smooth luminance distribution, then luminance uniformity is improved, but dark lines form between adjacent pixels due to misalignment of liquid crystal molecules
Solution Approach 1:
An auxiliary electrode is introduced as an intermediary element between adjacent pixels. This auxiliary electrode overlaps with the gap between two adjacent pixels and is electrically connected to both pixel electrodes, serving as a mediator to align liquid crystal molecules in the gap region and prevent dark line formation while maintaining the tessellated pixel arrangement for smooth luminance distribution
2Object-affected harmful factors
If auxiliary electrodes are added to reduce dark lines between pixels, then dark line formation is suppressed, but device structure becomes more complex
Solution Approach 1:
The auxiliary electrode serves multiple functions simultaneously: it acts as an alignment reference for liquid crystal molecules in the gap between pixels, provides an additional electrode connection point for voltage application, and helps maintain the tessellated pixel geometry. By making this single element multi-functional, the overall device complexity is minimized while effectively suppressing dark line formation
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
The solution effectively reduces dark line occurrence between pixels, improving luminance distribution and maintaining natural luminance patterns, especially in white display states, by ensuring aligned electric fields across adjacent pixels.
Implementation Method 1
Each of the auxiliary electrodes has a portion that overlaps a gap between two pixels that are adjacent to each other... applying signal voltage simultaneously to all pixels... ensuring aligned electric fields across adjacent pixels
Data Source
AI summary
A liquid crystal panel is a normally-black mode segment liquid crystal panel, and includes a plurality of pixels that are arrayed in substantial tessellation of an active region, as viewed from a direction of the normal of a first substrate, and a plurality of auxiliary electrodes that each have a portion that overlaps a gap between two pixels that are adjacent to each other, as viewed from the direction of the normal of the first substrate. A plurality of pixel electrodes, a common electrode, the plurality of auxiliary electrodes, and portions of a plurality of signal lines that are present in the active region are made of a transparent electroconductive material. The auxiliary electrodes are electrically connected to one of two pixel electrodes of the two pixels.