Transparent Electrode Segmentation for VA Display Response
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Solution Overview
Problem
Conventional vertically aligned liquid crystal displays face issues with high driving voltage, reduced light transmission, and increased push mura when used as touch panels due to large electrode patterns, which affect response rate and visibility.
Innovation Solution
A novel electrode structure featuring a plane transparent electrode layer on the array substrate and a single patterned transparent electrode layer on the color filter substrate, with a liquid crystal layer sandwiched between, reduces electrode complexity and enhances response rate while minimizing push mura and driving voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the width of the slit of the transparent electrode layer of the array substrate and the size of the opening of the transparent electrode layer of the color filter substrate are increased to enhance response rate, then response rate is improved, but push mura is increased and transmission is reduced
Solution Approach 1:
The invention divides the sub-pixel into multiple multi-domain areas by creating multiple slits in the array substrate electrode and multiple openings in the color filter substrate electrode. This segmentation allows the liquid crystal molecules to be oriented in multiple directions, improving response rate while keeping individual electrode feature sizes small to avoid push mura.
Solution Approach 2:
The invention transitions from a single-domain electrode structure to a multi-domain structure by adding spatial segmentation in the plane of the electrode. The slits and openings create multiple discrete electrode regions that independently control liquid crystal orientation in different directions, achieving faster response without increasing overall electrode size.
2Speed
If the width of the slit of the transparent electrode layer of the array substrate and the size of the opening of the transparent electrode layer of the color filter substrate are increased to enhance response rate, then response rate is improved, but driving voltage is increased
Solution Approach 1:
By segmenting the electrode into multiple small slits and openings distributed across the sub-pixel, the invention creates multiple independent switching regions. Each region can be controlled with lower voltage than a single large electrode would require, as the liquid crystal molecules in each segment respond independently to the applied electric field.
Solution Approach 2:
The invention applies different electrode patterns to different regions of the sub-pixel, with each region having optimized slit or opening dimensions tailored to local requirements. This local optimization allows each electrode segment to operate at lower voltage while collectively achieving fast response rate across the entire sub-pixel.
3Speed
If the width of the slit of the transparent electrode layer of the array substrate and the size of the opening of the transparent electrode layer of the color filter substrate are increased to enhance response rate, then response rate is improved, but transmission is reduced
Solution Approach 1:
The invention segments the electrode structure into multiple small slits and openings rather than using a few large ones. This segmentation increases the total number of light transmission paths while maintaining the necessary electric field distribution for fast response. The cumulative effect of many small openings provides sufficient transmission despite each individual opening being small.
Solution Approach 2:
The invention optimizes the dimensions, spacing, and distribution of slits and openings as parameters to achieve the desired balance. By carefully controlling the width of slits and openings, their separation distances, and their distribution patterns, the invention maximizes light transmission while maintaining the electrical characteristics needed for fast response rate.
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 enhances response rate, reduces push mura, increases light transmission, and lowers driving voltage, simplifying fabrication and reducing costs while maintaining high contrast ratio and wide viewing angles.
Implementation Method 1
a liquid crystal layer disposed between the first substrate and the second substrate, wherein the liquid crystal layer has a plurality of liquid crystal molecules therein and the liquid crystal molecules are orthogonal to the first substrate and the second substrate
Data Source
AI summary
A system for displaying images including a liquid crystal display panel is provided. The liquid crystal display panel includes a first substrate having at least one sub-pixel, a first transparent electrode layer disposed over the first substrate in the sub-pixel, a second substrate having an inner surface corresponding to the first substrate, a second transparent electrode layer disposed over the inner surface corresponding to the sub-pixel, wherein the second transparent electrode layer has only one pattern thereon, and a liquid crystal layer disposed between the first and the second substrates. The liquid crystal layer includes a plurality of liquid crystal molecules and the liquid crystal molecules are orthogonal to the first and the second substrates.