Liquid Crystal Display Columnar Spacer Dual PS Structure
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Solution Overview
Problem
Liquid crystal displays face challenges in maintaining a consistent gap between substrates due to thermal expansion and external pressures, leading to unevenness and irregularities, particularly at the peripheral edge of the display region where strength is compromised.
Innovation Solution
The implementation of a dual PS structure at the peripheral edge and a main or sub PS structure at the central part, where columnar spacers of different heights are used to manage gap changes, ensuring the peripheral edge has sufficient deformation to absorb thermal changes while maintaining strength at the central part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If columnar spacers are compressed in advance to follow gap changes, then the spacers can absorb thermal expansion, but the spacers cannot maintain sufficient strength when external pressure is applied
Solution Approach 1:
The display region is divided into a central region and a peripheral region, with different columnar spacer configurations in each region. The central region uses spacers compressed by a first amount, while the peripheral region uses spacers compressed by a second amount (greater than the first), allowing each region to be optimized for its specific requirements
Solution Approach 2:
Different compression amounts are applied to columnar spacers in different regions of the display panel. The peripheral region receives greater compression than the central region, creating local variations in spacer properties that match the local structural needs - stronger support at edges, more flexibility in the center
2Stability of the object's composition
If the columnar spacer is highly compressible to absorb thermal changes, then gap stability is improved, but the spacer deforms excessively under external load causing gap irregularity
Solution Approach 1:
The display region is segmented into central and peripheral zones with different spacer compression levels. This segmentation allows the peripheral region to have spacers that are more resistant to deformation under load, while the central region maintains spacers optimized for thermal expansion absorption
Solution Approach 2:
The compression amount parameter is varied across different regions of the display panel. By changing this parameter (compression amount) from the central region to the peripheral region, the patent optimizes both gap stability and gap uniformity in different areas simultaneously
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 configuration effectively suppresses gap changes at the peripheral edge while maintaining sufficient strength at the central part, preventing irregularities and ensuring display quality.
Implementation Method 1
the change in the gap caused by thermal expansion of a liquid crystal can be absorbed by extension through elastic deformation of the columnar spacer
Implementation Method 2
the columnar spacer should have a plastic deformation amount reduced after strong force is applied and then removed
Data Source
AI summary
A liquid crystal display includes a liquid crystal display panel. The liquid crystal display panel includes a substrate and a substrate which are disposed opposite to each other, columnar spacers which are disposed on a surface of the substrate, and a liquid crystal layer filled between the substrates. A peripheral edge part of a display region has a dual PS structure in which the columnar spacer and the columnar spacer are disposed. A central part of the display region has any of a main PS structure in which only the columnar spacer is disposed, a sub PS structure in which only the columnar spacer is disposed, and the dual PS structure.