Cholesteric Liquid Crystal Display with Solar Cell and Shielding Layer
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Solution Overview
Problem
Cholesteric liquid crystal displays in prior art are limited by the need for external electrical energy to switch between stable states, which restricts their application and image quality due to reflectivity issues from metal wiring patterns.
Innovation Solution
A cholesteric liquid crystal display device using a solar cell as a black material to absorb incident light and provide self-sustaining power, combined with a shielding layer to reduce light reflectivity from metal wiring patterns, ensuring image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a conventional black absorbing layer is used at the bottom of the cholesteric liquid crystal panel, then the panel can absorb incident light, but the panel requires external electrical energy to switch between stable states and has limited application
Solution Approach 1:
The solar cell integrated into the display device generates electrical energy from incident light to power the switching between stable states of the cholesteric liquid crystal molecules, eliminating the need for external electrical energy sources and enabling self-sustaining operation
Solution Approach 2:
The black material layer serves dual functions: it acts as a light-absorbing layer for the display function and simultaneously serves as a solar cell to generate electrical energy, combining two separate functions into one component
2Power
If metal wiring pattern layer is present in the solar cell, then the solar cell can collect and transmit electrical energy, but the metal wiring pattern reflects incident light and degrades image quality
Solution Approach 1:
A shielding layer is introduced between the metal wiring pattern layer and the incident light to block and absorb reflected light, preventing the harmful reflection from reaching the display area while allowing the metal wiring to continue its electrical function
Solution Approach 2:
The shielding layer, positioned to cover the metal wiring pattern, converts the harmful light reflection into a beneficial structure by absorbing the reflected light and redirecting it, thereby improving image quality while preserving the electrical functionality of the metal wiring
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
Enables the cholesteric liquid crystal display to operate with self-sustaining power and improved image quality by absorbing incident light and minimizing light reflection from metal wiring patterns, overcoming previous limitations.
Implementation Method 1
utilizing a black material of a solar cell to replace conventionally black absorbing layer to absorb incident light and display image by self-sustaining power
Implementation Method 2
the shielding layer is disposed between the solar cell and the first electrode layer and corresponds to and over the metal wiring pattern layer so as to lessen the reflectivity of the incident light with respect to the metal wiring pattern layer
Implementation Method 3
The cholesteric liquid crystal molecules have two stable states such as focal conic state and planar state, and their molecular orientation will be maintained without external electrical energy. With application of an external electrical field, the orientation of cholesteric liquid crystal molecule will be switched between these two stable states
Data Source
AI summary
A cholesteric liquid crystal display device includes a first substrate, a solar cell, a shielding layer, a first electrode layer, a cholesteric liquid crystal layer, a second electrode layer and a second substrate stacked sequentially from bottom to top. The solar cell includes a metal wiring pattern layer. The shielding layer corresponds to the upper side of the metal wiring pattern layer, and is used to reduce the reflection of light from the metal circuit pattern layer. In this way, the cholesteric liquid crystal display device replaces the traditional black absorbing layer with the black material of the solar cell, which can not only absorb light, but also display the image with self-sustaining power. The cholesteric liquid crystal display device shields the arrangement of the metal wiring pattern layer through the shielding layer, which can ensure the image quality of the display panel.