Cholesteric Liquid Crystal Display with Photoresist Pattern Definition
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Solution Overview
Problem
Conventional cholesteric liquid crystal display devices require complex pixel array structures, leading to high manufacturing costs and environmental concerns, while lacking the flexibility to selectively display decorative patterns without significant expense or environmental impact.
Innovation Solution
A display device with a simple structure that uses a cholesteric liquid crystal layer and transparent photoresist structures, driven by sub-electrodes, eliminating the need for complex array structures and enabling cost-effective and environmentally friendly switching of decorative patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If complex pixel array structures are used to switch decorative patterns, then the ability to selectively display patterns is improved, but manufacturing cost increases and environmental impact worsens
Solution Approach 1:
The patent extracts the pattern definition function from complex pixel arrays and concentrates it into simple transparent photoresist structures. These photoresist structures are formed by direct writing or printing methods, eliminating the need for complex pixel array structures while maintaining the ability to define decorative patterns selectively.
Solution Approach 2:
The patent uses transparent photoresist structures as templates or masks that copy the desired decorative pattern geometry. These photoresist structures are formed first, then cholesteric liquid crystal molecules are filled into the spaces defined by these templates, creating the final decorative patterns without requiring complex pixel arrays.
2Adaptability or versatility
If complex pixel array structures are used to switch decorative patterns, then the ability to selectively display patterns is improved, but manufacturing cost increases
Solution Approach 1:
The patent extracts the pattern definition function from complex pixel arrays and concentrates it into simple transparent photoresist structures. These photoresist structures are formed by direct writing or printing methods, eliminating the need for complex pixel array structures while maintaining the ability to define decorative patterns selectively.
Solution Approach 2:
The patent employs disposable transparent photoresist structures that are formed temporarily to define patterns, then removed after serving their purpose. This approach is more cost-effective than creating permanent complex pixel array structures, as the photoresist materials are inexpensive and can be applied only when pattern switching is needed.
3Adaptability or versatility
If complex pixel array structures are used, then decorative pattern switching capability is improved, but environmental impact worsens
Solution Approach 1:
The patent extracts the pattern definition function from complex pixel arrays and concentrates it into simple transparent photoresist structures. These photoresist structures are formed by direct writing or printing methods, eliminating the need for complex pixel array structures while maintaining the ability to define decorative patterns selectively.
Solution Approach 2:
The patent employs a process where transparent photoresist structures are formed, used to define patterns, then removed and potentially recovered or disposed of in an environmentally friendly manner. This temporary use approach reduces waste compared to manufacturing permanent complex pixel array structures that cannot be easily modified or recycled.
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 provides a cost-effective and environmentally friendly method to switch decorative patterns in cholesteric liquid crystal display devices, reducing manufacturing costs and environmental impact by using a simple structure with transparent photoresist structures and sub-electrodes to drive cholesteric liquid crystal patterns.
Implementation Method 1
Cholesteric liquid crystal represents a specific category of liquid crystal molecules characterized by bistable properties. These molecules possess the ability to reflect circularly polarized light with a wavelength corresponding to their pitch
Implementation Method 2
Each of the transparent photoresist structures is a closed structure, and the cholesteric liquid crystal molecules are respectively accommodated in a plurality of patterned areas respectively surrounded by the transparent photoresist structures
Data Source
AI summary
A display device including a substrate, a cholesteric liquid crystal layer, and a transparent electrode layer that are sequentially stacked is provided. The cholesteric liquid crystal layer includes cholesteric liquid crystal molecules and a plurality of transparent photoresist structures. Each of the transparent photoresist structures is a closed structure, and the cholesteric liquid crystal molecules are respectively accommodated in a plurality of patterned areas respectively surrounded by the transparent photoresist structures, so as to form a plurality of cholesteric liquid crystal patterns. The transparent electrode layer includes a plurality of sub-electrodes. The cholesteric liquid crystal patterns are respectively driven by the sub-electrodes. An orthogonal projection of each of the transparent photoresist structures on the substrate falls in an orthogonal projection of a corresponding sub-electrode of the sub-electrodes on the substrate.