Liquid Crystal Display with Segmented Transmission and Reflection Modes
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Solution Overview
Problem
Liquid crystal display devices struggle to provide clear images both indoors and outdoors, especially in sunlight, due to limited viewing angles and significant color shift when the display screen is viewed from different angles.
Innovation Solution
A liquid crystal display device is designed with both transmission and reflection modes, featuring a liquid crystal layer where molecules rotate parallel to the electrode plane when an electric field is applied, allowing for wide viewing angles and reduced color shift. This is achieved by using a structure with a pair of electrodes in different layers or overlapping configurations, including a light-transmitting and light-reflecting electrode, to control light transmissivity and reflectivity effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a horizontal electric field type liquid crystal display device is used, then the viewing angle is wide and color shift is reduced, but the device complexity increases
Solution Approach 1:
The patent segments the display device into distinct transmission type and reflection type regions, each with optimized electrode configurations. This segmentation allows each region to be independently optimized for its specific function while maintaining overall device performance
Solution Approach 2:
Different regions of the display device are assigned different local qualities: the transmission type region uses electrode configurations optimized for light transmission, while the reflection type region uses configurations optimized for light reflection. This local optimization allows each region to perform its specific function effectively
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 enables a liquid crystal display device that offers a wide viewing angle and minimal color shift, ensuring images are clearly visible both indoors and outdoors, even in bright sunlight, by effectively managing light transmission and reflection across different viewing angles.
Implementation Method 1
a liquid crystal layer, and a first electrode and a second electrode provided below the liquid crystal layer, wherein the liquid crystal layer includes a liquid crystal molecule which rotates parallel to an electrode plane, that is, in a plane parallel to a substrate, when a potential difference is generated between two electrodes of a liquid crystal element
Implementation Method 2
a liquid crystal molecule which rotates parallel to an electrode plane, that is, in a plane parallel to a substrate, when a potential difference is generated between two electrodes of a liquid crystal element
Implementation Method 3
a first portion in which display is performed by transmission of light and a second portion in which display is performed by reflection of light
Data Source
AI summary
It is an object of the present invention to provide a liquid crystal display device which has a wide viewing angle and less color-shift depending on an angle at which a display screen is seen and can display an image favorably recognized both outdoors in sunlight and dark indoors (or outdoors at night). The liquid crystal display device includes a first portion where display is performed by transmission of light and a second portion where display is performed by reflection of light. Further, a liquid crystal layer includes a liquid crystal molecule which rotates parallel to an electrode plane when a potential difference is generated between two electrodes of a liquid crystal element provided below the liquid crystal layer.