Polymer Liquid Crystal Light-Scattering Adjustment Layer for Display Uniformity
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Solution Overview
Problem
Transparent polymer liquid crystal display devices suffer from poor display uniformity due to light attenuation, leading to varying brightness across different pixels despite identical electrical signals.
Innovation Solution
A display device with a polymer liquid crystal cell featuring a light-scattering adjustment layer, where the concentration of macromolecular polymer and electrode design vary along the direction from the light source to enhance light scattering, ensuring uniformity by adjusting the light-scattering ability based on distance from the light source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a transparent polymer liquid crystal cell is used to achieve high light transmittance, then light transmittance is improved, but display uniformity deteriorates due to light attenuation across different regions
Solution Approach 1:
The patent applies local quality by creating regions with different light-scattering abilities within the polymer liquid crystal cell. Specifically, it divides the cell into a first region (closer to light source) and a second region (farther from light source), where the second region has enhanced light-scattering ability through increased polymer concentration or optimized liquid crystal alignment. This compensates for light attenuation and achieves uniform display across different regions while maintaining high overall light transmittance.
2Device complexity
If the polymer liquid crystal cell structure is simplified, then device complexity is reduced, but display uniformity deteriorates due to unaddressed light attenuation
Solution Approach 1:
The patent applies parameter changes by modifying the polymer concentration distribution or liquid crystal alignment parameters across different regions of the cell. The second region (farther from light source) has higher polymer concentration or different alignment characteristics to enhance light scattering and compensate for attenuation. This achieves display uniformity through parameter optimization rather than adding complex structural 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 improves display uniformity by compensating for light attenuation, ensuring consistent brightness across the display region, even as light intensity decreases with distance from the source, thereby enhancing the overall display performance.
Implementation Method 1
a light-scattering adjustment layer between the first electrode layer and the second electrode layer; and a light source, arranged on a first side of the polymer liquid crystal cell and configured to emit light into the light-scattering adjustment layer
Data Source
AI summary
Display device and fabrication method thereof are provided. A display includes a polymer liquid crystal cell, including a first electrode layer, a second electrode layer, and a light-scattering adjustment layer between the first electrode layer and the second electrode layer; and a light source, arranged on a first side of the polymer liquid crystal cell and configured to emit light into the light-scattering adjustment layer. The first electrode layer includes at least one first electrode. The second electrode layer includes at least one second electrode. The display region of the polymer liquid crystal cell includes a plurality of regions having a light-scattering ability increase along a direction away from the light source.