Curved LCD Alignment Stabilization Layer
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Solution Overview
Problem
Curved liquid crystal displays (LCDs) face challenges in maintaining light transmittance due to misalignment of substrates during bending, which causes interference and reduces display quality, particularly when using flat panel LCDs with pretilt angles and liquid crystal alignment stabilization layers including reactive mesogen polymers.
Innovation Solution
A curved LCD design featuring a TFT array substrate, a counter substrate, a liquid crystal layer with negative dielectric anisotropy, and a liquid crystal alignment stabilization layer with projections of reactive mesogen polymers, where the stabilization layer is selectively provided only on the lower alignment base layer to adjust pretilt angles and stabilize liquid crystal molecule alignment, improving light transmittance by controlling the alignment and polymerization of reactive mesogens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a curved LCD is formed by bending a flat panel LCD with pretilt angles and liquid crystal alignment stabilization layers, then the LCD achieves a curved shape for improved viewing experience, but substrate misalignment during bending causes interference and reduces light transmittance
Solution Approach 1:
The patent removes the liquid crystal alignment stabilization layer from one of the substrates (either the array substrate or counter substrate) to eliminate the interference caused by multiple stabilization layers during bending. This extraction of the problematic component resolves the light transmittance issue while preserving the curved shape capability.
Solution Approach 2:
The patent applies the liquid crystal alignment stabilization layer selectively - present on one substrate but absent on the other. This local differentiation in layer configuration optimizes the alignment stability needed for curved displays while minimizing the interference that causes light transmittance loss.
2Stability of the object's composition
If liquid crystal alignment stabilization layers including reactive mesogen polymers are used on both substrates, then liquid crystal molecule alignment is stabilized, but interference between layers reduces light transmittance
Solution Approach 1:
The patent extracts the liquid crystal alignment stabilization layer from one substrate, leaving it only on the other substrate. This eliminates the interfering interaction between two stabilization layers while maintaining sufficient alignment stability through the single remaining layer.
Solution Approach 2:
The stabilization layer is applied locally to only one substrate rather than both, creating an asymmetric configuration that provides necessary alignment stability without the harmful interference effects of dual stabilization layers.
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 light transmittance in curved LCDs by maintaining inclined alignment of liquid crystal molecules, reducing texture-related light transmittance reduction and improving display quality by selectively forming the liquid crystal alignment stabilization layer on the lower alignment base layer.
Implementation Method 1
selectively forming a liquid crystal alignment stabilization layer including projections of reactive mesogenic polymers on the liquid crystal alignment base layer by irradiating ultraviolet rays to the LCD panel
Implementation Method 2
a liquid crystal layer including liquid crystal molecules of negative dielectric anisotropy and disposed between the TFT array substrate and the counter substrate
Data Source
AI summary
A curved liquid crystal display (“LCD”) includes a thin film transistor (“TFT”) array substrate, a counter substrate facing the TFT array substrate, a liquid crystal layer including liquid crystal molecules of negative dielectric anisotropy and disposed between the TFT array substrate and the counter substrate, a liquid crystal alignment layer disposed between the liquid crystal layer and the counter substrate, a liquid crystal alignment base layer disposed between the liquid crystal layer and the TFT array substrate, and a liquid crystal alignment stabilization layer including projections spaced apart from each other on the liquid crystal alignment base layer between the liquid crystal layer and the liquid crystal alignment base layer, wherein the projections include reactive mesogen polymers, and one of the liquid crystal alignment layer and the liquid crystal alignment base layer includes the reactive mesogen polymers.