Reflective Display Panel Absorption Reflection Segmentation
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Solution Overview
Problem
Conventional reflective LCDs face challenges in simultaneously improving the ability to express both black and white colors due to the trade-off between absorption and reflection rates, where higher absorption rates lower reflective ratios and vice versa.
Innovation Solution
A reflective display panel with a liquid crystal layer, an upper substrate including a color filter and transparent substrate, and a lower substrate featuring an absorption plate and a reflection plate, where voltages are controlled to optimize absorption and reflection rates based on signal intensity to enhance the expression of black and white colors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the absorption rate of the reflective LCD panel is increased to improve black color expression, then the reflective ratio decreases, adversely affecting white color expression
Solution Approach 1:
The lower substrate is divided into two distinct functional regions: an absorption plate for absorbing light to express black colors and a reflection plate for reflecting light to express white colors. This segmentation allows each region to independently optimize its function without compromising the other, resolving the trade-off between absorption rate and reflective ratio.
Solution Approach 2:
Different regions of the lower substrate are assigned different optical properties: the absorption plate has high light absorption characteristics while the reflection plate has high light reflection characteristics. This local differentiation of quality enables simultaneous optimization of black and white color expression in their respective regions.
2Illumination intensity
If the reflective ratio of the reflective LCD panel is increased to improve white color expression, then the absorption rate decreases, adversely affecting black color expression
Solution Approach 1:
The lower substrate is segmented into separate absorption and reflection regions, allowing the reflection plate to maximize reflective ratio for white color expression without compromising the absorption plate's ability to express black colors through high absorption rate.
Solution Approach 2:
The reflection plate region is optimized with high reflective ratio characteristics specifically for white color expression, while the absorption plate region maintains high absorption characteristics for black color expression, achieving local optimization without global compromise.
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 allows for improved expression of both black and white colors by dynamically adjusting absorption and reflection rates in response to signal intensity, thereby enhancing the overall performance of the reflective display panel.
Implementation Method 1
the absorption plate absorbs a first external light, having penetrated the liquid crystal layer via the color filter, when a first voltage is supplied between the color filter and the absorption plate
Implementation Method 2
the reflection plate reflects a second external light, having penetrated the liquid crystal layer via the transparent substrate, when a second voltage is supplied
Data Source
AI summary
A reflective display panel is provided. The reflective display panel includes a liquid crystal layer, an upper substrate including a color filter and a transparent substrate, and a lower substrate including an absorption plate which faces a color filter and a reflection plate which faces a transparent substrate. The absorption plate absorbs a first external light, having penetrated the liquid crystal layer via the color filter, when a first voltage is supplied between the color filter and the absorption plate, and the reflection plate reflects a second external light, having penetrated the liquid crystal layer via the transparent substrate, when a second voltage is supplied.