Reflective LCD Diffuse Reflection via Plastic Layer
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Solution Overview
Problem
Conventional reflective liquid crystal display devices face challenges in simplifying the manufacturing process and reducing costs for forming a diffuse reflection layer, which is complex and costly due to the need for additional processing steps.
Innovation Solution
A reflective liquid crystal display device is designed with a mirror-reflection layer composed of a transparent plastic material mixed with transparent particles, which provides a diffuse reflection effect without the need for additional processing, by combining a transparent plastic layer with a metallic mirror-reflection layer to achieve diffuse reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a diffuse-reflection layer is formed by processing the reflective layer surface to create bump structures, then a diffuse reflection effect is achieved, but the manufacturing process becomes complicated and cost increases
Solution Approach 1:
The invention extracts the diffuse reflection function from the complex multi-step photoresist processing and separates it into a dedicated transparent plastic layer with transparent particles. This layer is applied separately and does not require the complicated exposure and development processes, thereby simplifying the overall manufacturing while achieving the same diffuse reflection effect
Solution Approach 2:
The invention changes the approach from creating physical bump structures through photoresist processing to incorporating transparent particles with different refractive indices into a transparent plastic matrix. This parameter change in the material composition achieves diffuse reflection through optical scattering rather than physical surface irregularities, simplifying the manufacturing process
2Illumination intensity
If a diffuse-reflection layer is formed by processing the reflective layer surface to create bump structures, then a diffuse reflection effect is achieved, but manufacturing cost increases
Solution Approach 1:
The invention extracts the diffuse reflection function from the complex multi-step photoresist processing and separates it into a dedicated transparent plastic layer with transparent particles. This layer is applied separately and does not require the complicated exposure and development processes, thereby simplifying the overall manufacturing while achieving the same diffuse reflection effect
Solution Approach 2:
The invention replaces the expensive and time-consuming photoresist processing with a simpler transparent plastic layer containing transparent particles. This simpler layer can be applied more economically without requiring cleanroom facilities or multiple processing runs, reducing manufacturing cost
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 approach simplifies the manufacturing process and reduces costs by eliminating the need for additional processing steps, while maintaining the diffuse reflection effect, making it suitable for mobile and wearable devices.
Implementation Method 1
the transparent plastic layer comprises a transparent plastic material and transparent particles mixed in the transparent plastic material; The transparent particles and the transparent plastic material have different reflectivity
Implementation Method 2
provide an effect of diffuse reflection
Data Source
AI summary
The present invention provides a reflective liquid crystal display device, which includes an upper substrate and a lower substrate that are opposite to each other, a liquid crystal layer arranged between the upper and lower substrates, a transparent plastic layer bonded to a surface of the lower substrate that is distant from the liquid crystal layer, and a mirror-reflection layer that is attached by the transparent plastic layer to the surface of the lower substrate. The transparent plastic material of the transparent plastic layer for attaching the mirror-reflection layer contains therein transparent particles and the transparent plastic material and the transparent particles have different reflectivity so as to provide an effect of diffuse reflection. Namely, the transparent plastic layer and the mirror-reflection layer are combined together to provide a diffuse-reflection layer, so that compared to the conventional reflective liquid crystal display devices, there is no need to conduct an additional process for forming a diffuse-reflection layer, thereby simplifying the manufacturing of the diffuse-reflection layer and reducing the difficulty and cost of the manufacturing.