Liquid Crystal Display Panel Low Wettability Frame Structure
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Solution Overview
Problem
Existing liquid crystal display panels face issues with contamination of the liquid crystal material and reduction in seal bonding strength due to the contact between the seal material in an uncured or semi-cured state and the liquid crystal material, leading to display quality and reliability problems.
Innovation Solution
A liquid crystal display panel with a low wettability structure on the surface of the substrates in the frame region, which reduces the surface energy and wettability to the liquid crystal material, preventing contact between the seal material in the uncured or semi-cured state and the liquid crystal material during the curing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the seal material is applied in an uncured or semi-cured state to bond the substrates, then the seal material can be properly positioned and bonded to the substrates, but the liquid crystal material contacts the uncured seal material causing contamination and reduction in bonding strength
Solution Approach 1:
A barrier layer is introduced as an intermediary between the liquid crystal material and the seal material. This barrier layer prevents direct contact between the liquid crystal and the uncured seal material, thereby eliminating contamination while allowing the seal material to maintain its bonding function.
Solution Approach 2:
The seal material is preliminarily cured to a semi-cured state before contact with the liquid crystal material. This preliminary curing action reduces the elution of impurity ions from the seal material, preventing contamination of the liquid crystal while still allowing adequate bonding.
2Manufacturing precision
If the liquid crystal material is allowed to diffuse uniformly into the pixel region, then the gap between substrates is uniformly formed, but the liquid crystal material reaches the seal material in the frame region causing contamination
Solution Approach 1:
The frame region is segmented into a liquid crystal diffusion control region with different surface properties. This segmentation allows the liquid crystal to diffuse uniformly in the pixel region while restricting its movement in the frame region, preventing contact with the seal material.
Solution Approach 2:
Different surface energy characteristics are applied to different regions: the pixel region allows liquid crystal diffusion for uniform gap formation, while the frame region has reduced surface energy to prevent liquid crystal diffusion and contact with the seal material.
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 low wettability structure effectively suppresses the contamination of the liquid crystal material and enhances the bonding strength of the seal material, improving the display quality and reliability of the liquid crystal display panel by controlling liquid crystal diffusion and maintaining uniformity of the gap between substrates.
Implementation Method 1
a low wettability structure which has wettability to the liquid crystal material that is lower than that of the surface of the substrate in the pixel region
Data Source
AI summary
A liquid crystal display panel has a pair of opposed substrates, a seal material and a liquid crystal material. The seal material bonds the pair of substrates to each other, and is formed into a closed curve shape enclosing a region including a pixel region. The liquid crystal material is filled in a region enclosed by the pair of substrates and the seal material. A surface of interface which is a surface made up of at least one substrate of the pair of substrates, and which is in contact with the liquid crystal material in a frame region enclosed by an outer periphery of the pixel region and an inner periphery of the seal material, includes a low wettability structure in which wettability to the liquid crystal material is lower than that of the surface of the one substrate in the pixel region.