Single-Substrate Display with Sealed Liquid Crystal Cavity
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Solution Overview
Problem
Liquid crystal display devices face challenges in reliability due to external impacts, and existing manufacturing methods are costly and complex, particularly in maintaining the structure of the liquid crystal layer.
Innovation Solution
A display apparatus with a single substrate that includes a pixel area, a light blocking layer, a thin film transistor, a liquid crystal layer, and a color filter, where the liquid crystal is sealed in a cavity and the color filter covers it, improving impact resistance and reducing manufacturing costs by eliminating the need for a separate organic layer to maintain the liquid crystal structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a single substrate structure is used, then impact resistance is improved, but the structure of the liquid crystal layer becomes unstable
Solution Approach 1:
A color filter layer is introduced as an intermediary element that serves dual purposes: it maintains the structural stability of the liquid crystal layer while allowing the single substrate design to provide impact resistance. The color filter acts as a mediator between the substrate and liquid crystal, providing the necessary structural support without requiring a separate organic layer.
2Stability of the object's composition
If a separate organic layer is added to maintain liquid crystal structure, then structural stability is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The color filter layer is designed to perform multiple functions simultaneously: it provides structural support for the liquid crystal layer, maintains layer stability, and eliminates the need for a separate organic maintenance layer. This multi-functional approach simplifies the overall device structure and reduces manufacturing complexity while maintaining structural integrity.
3Ease of manufacture
If the light blocking layer is exposed to high temperature processes, then manufacturing flexibility is improved, but physical and chemical changes to the light blocking layer occur
Solution Approach 1:
The light blocking layer is designed with specific material properties and thickness parameters that allow it to withstand high temperature manufacturing processes without undergoing detrimental physical or chemical changes. By optimizing these parameters, the layer maintains its functional properties while enabling flexible manufacturing process selection.
Data Source
AI summary
A display apparatus includes a backlight unit generating light and a display substrate displaying an image using the light. The display substrate includes a substrate, a first electrode, a light blocking layer, a thin film transistor, a second electrode, a liquid crystal and a color filter. The substrate includes a pixel area and a non-pixel area, the first electrode is in the pixel area, and the light blocking layer is in the non-pixel area to block the light. The thin film transistor is on the light blocking layer and electrically connected to the first electrode. The second electrode faces the first electrode, and a cavity is defined therebetween. The liquid crystal is in the cavity, the color filter is on the second electrode, and the color filter is closer to the backlight unit than the substrate.