Liquid Crystal Layer Polymer Density Control for Scattering Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices using polymer dispersed liquid crystals face challenges in maintaining display quality due to degradation from undesired scattering, which affects light transmission and efficiency.
Innovation Solution
The implementation of a liquid crystal layer with denser polymers in areas overlapping scanning lines and thicker polymers in areas overlapping pixel electrodes, along with a protrusion structure formed of transparent resin, to control the scattering state and maintain transparency, thereby suppressing degradation and enhancing light usage efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a liquid crystal layer with polymers is used to enable switching between diffusing and transmitting light, then the display device can control light transmission, but undesired scattering occurs in areas overlapping scanning lines which degrades display quality
Solution Approach 1:
The patent applies local quality by creating different polymer densities in different regions of the liquid crystal layer. Specifically, the polymer density is made higher in areas overlapping scanning lines (first areas) and lower in areas overlapping pixel electrodes (second areas). This localized differentiation allows the scanning line regions to suppress scattering while maintaining the light transmission control functionality in the display areas.
Solution Approach 2:
The patent changes the physical parameter of polymer density within the liquid crystal layer. By controlling the polymer concentration to be higher in specific regions (overlapping scanning lines) and lower in other regions (overlapping pixel electrodes), the patent modifies the scattering characteristics locally. This parameter change enables suppression of undesired scattering in the scanning line areas while preserving display functionality.
2Adaptability or versatility
If polymer dispersed liquid crystal is used for switching light states, then the display device can achieve diffusing and transmitting states, but light efficiency degrades due to scattering losses
Solution Approach 1:
The patent reduces energy loss by applying local quality differentiation to the polymer distribution. Areas overlapping scanning lines have higher polymer density to suppress scattering and reduce light loss, while areas overlapping pixel electrodes have lower polymer density to maintain efficient light transmission for display purposes. This localized optimization minimizes overall light efficiency degradation.
3Ease of manufacture
If uniform polymer distribution is used in the liquid crystal layer, then the manufacturing process is simplified, but scattering occurs in scanning line areas reducing display quality
Solution Approach 1:
The patent implements local quality by creating non-uniform polymer distribution with higher density in scanning line areas and lower density in pixel electrode areas. This approach accepts increased manufacturing complexity as a trade-off to eliminate the harmful scattering effect in scanning line regions, thereby improving overall display quality.
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 reduces undesired scattering, maintains high transparency, and improves light efficiency by confining the electric field within the protrusions, thus preventing light leakage and maintaining display quality.
Implementation Method 1
capable of switching a diffusing state of diffusing incident light and a transmitting state of transmitting incident light
Implementation Method 2
a liquid crystal layer held between the first substrate and the second substrate and including streaky polymers and liquid crystal molecules
Data Source
AI summary
According to one embodiment, a display device includes a first substrate including a scanning line and a pixel electrode, a second substrate opposed to the first substrate, and a liquid crystal layer held between the first substrate and the second substrate and including streaky polymers and liquid crystal molecules, wherein the liquid crystal layer includes a first area overlapping the scanning line and a second area overlapping the pixel electrode, and the polymers of the first area are denser than the polymers of the second area.