Liquid Crystal Display Alignment Layers with Distinct Ion Adsorbing Groups
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Solution Overview
Problem
Liquid crystal display apparatuses, especially large-sized TVs, face visual differences between the center and edges due to discoloration and reduced voltage holding ratio (VHR), which affect display quality and uniformity.
Innovation Solution
Incorporating first and second liquid crystal alignment layers with distinct ion adsorbing groups, differing in chemical structure or content, to control ion impurity adsorption and maintain alignment, thereby reducing discoloration and enhancing VHR.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a liquid crystal display apparatus is formed in a curved shape to compensate for visual differences, then viewing angle and display uniformity are improved, but discoloration and voltage holding ratio deteriorate
Solution Approach 1:
The patent applies different ion adsorbing group contents or chemical structures to different locations (first and second liquid crystal alignment layers) to create local variations in ion adsorption capacity. This local differentiation compensates for the non-uniform stress distribution in curved displays, preventing discoloration and maintaining voltage holding ratio across the entire curved surface.
2Reliability
If ion adsorbing groups are added to liquid crystal alignment layers to reduce discoloration, then display quality is improved, but device complexity increases
Solution Approach 1:
The patent modifies the chemical composition parameters of the liquid crystal alignment layers by incorporating ion adsorbing groups with different contents or chemical structures. This parameter change enables the alignment layers to selectively adsorb ion impurities, reducing discoloration while maintaining a relatively simple overall device structure without adding complex mechanical or optical components.
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 minimizes discoloration and improves the voltage holding ratio, ensuring better display uniformity and quality, even when the substrates are curved.
Implementation Method 1
the first liquid crystal alignment layer may include a first ion adsorbing group, and the second liquid crystal alignment layer may include a second ion adsorbing group
Data Source
AI summary
Provided is a liquid crystal display apparatus. The liquid crystal display apparatus includes: a first substrate; a second substrate facing the first substrate; a liquid crystal layer disposed between the first substrate and the second substrate; a first liquid crystal alignment layer disposed between the first substrate and the liquid crystal layer; and a second liquid crystal alignment layer disposed between the second substrate and the liquid crystal layer. The first liquid crystal alignment layer may include a first ion adsorbing group, and the second liquid crystal alignment layer may include a second ion adsorbing group. A content of the first ion adsorbing group in the first liquid crystal alignment layer may be different from that of the second ion adsorbing group in the second liquid crystal alignment layer, or a chemical structure of the first ion adsorbing group may be different from that of the second ion adsorbing group.