Polymer Liquid Crystal Cell Haze Gradient for Uniform Light Emission
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Solution Overview
Problem
Polymer liquid crystal cells in display panels exhibit uneven light guiding and emitting due to higher light intensities near the light source area and lower intensities away from it, leading to non-uniform light distribution.
Innovation Solution
A display panel design featuring a polymer liquid crystal cell with a first region close to the light source and a second region farther away, where the second region has a higher haze than the first region, achieved by using a patterned mask plate to control ultraviolet light exposure and separate liquid crystals from the polymer phase, resulting in smaller droplet sizes and increased scattering in the second region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a polymer liquid crystal cell is used in a display panel, then light guiding and light emitting functions are achieved, but light emitting intensities close to a light source area are large and light emitting intensities away from a light source area are small, resulting in uneven light guiding and light emitting
Solution Approach 1:
The patent applies local quality by creating different haze values in different regions of the polymer liquid crystal cell. Specifically, the cell is divided into a first region (closer to light source) with lower haze and a second region (farther from light source) with higher haze. This spatial variation in optical properties compensates for the non-uniform light distribution, achieving uniform overall light guiding and emitting performance across the display panel.
2Manufacturing precision
If a polymer liquid crystal cell is used in a display panel, then light guiding and light emitting functions are achieved, but light emitting intensities close to a light source area are large and light emitting intensities away from a light source area are small, resulting in uneven light guiding and light emitting
Solution Approach 1:
The patent implements local quality by incorporating a light source distribution control layer that creates spatially varying haze values within the polymer liquid crystal cell. This layer introduces controlled structural complexity to achieve the desired non-uniform optical properties, where the first region has lower haze and the second region has higher haze, thereby compensating for the inverse-square law light intensity decay and achieving uniform light guiding and emitting performance.
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 design ensures uniform light emission across the polymer liquid crystal cell by reducing light intensity near the light source and increasing it farther away, thereby improving light guiding and emitting uniformity.
Implementation Method 1
the polymer dispersed liquid crystal is subjected to reactions of separating of liquid crystal from a polymer phase and curing
Implementation Method 2
the second region has a higher haze than the first region, thereby reducing the light emitting intensity close to the light source region and increasing the light emitting intensity away from the light source region
Implementation Method 3
irradiating the polymer liquid crystal cell with an ultraviolet light through the mask plate, wherein the polymer dispersed liquid crystal in the polymer liquid crystal cell is subjected to reactions of separating of liquid crystal from a polymer phase and curing
Data Source
AI summary
Embodiments of the present application disclose a display panel and a preparation method thereof, and a display device. The display panel comprises a polymer liquid crystal cell and a light source. The polymer liquid crystal cell comprises a first region close to the light source and a second region away from the light source, and the second region has a higher haze than the first region, thereby reducing the light emitting intensity close to the light source region and increasing the light emitting intensity away from the light source region, so that light guide and light emitting in each region of the polymer liquid crystal cell uniform.