Display Device Outer Substrate Strength Thickness Reduction
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Solution Overview
Problem
Conventional display devices face challenges in achieving highly thin designs while maintaining sufficient strength, as they require additional substrates and protection members that increase thickness and complexity.
Innovation Solution
A display device structure featuring a first substrate with a pixel circuit and a second substrate with greater strength, where the second substrate serves as the outermost layer, eliminating the need for additional cover glasses and protection members, and incorporating a second polarizer on the inner side to prevent scratches and contamination, thereby reducing thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional display devices use multiple substrates and protection members, then strength and protection are improved, but thickness and device complexity increase
Solution Approach 1:
The patent removes the cover glass from the conventional display structure, extracting the protective function to the second substrate itself. The second substrate is designed with sufficient strength to provide protection without requiring an additional cover glass layer, thereby reducing overall device thickness while maintaining protective capabilities.
Solution Approach 2:
The second substrate serves multiple functions simultaneously: it acts as both a structural support element and a protective layer against scratches and contamination. By making the second substrate the outermost layer with adequate strength, it replaces the traditional cover glass function, eliminating the need for separate protection members.
2Reliability
If conventional display devices add cover glasses and protection members, then protection against scratches and contamination is improved, but device complexity and substrate count increase
Solution Approach 1:
The patent extracts the protective function from separate cover glasses and protection members, concentrating it in the second substrate. This eliminates unnecessary components while maintaining the protective function against scratches and contamination, thereby reducing device complexity.
Solution Approach 2:
The second substrate is designed to perform multiple functions: structural support, protection against scratches, and prevention of contamination. This multi-functional design eliminates the need for separate protection members, reducing the overall substrate count and simplifying the device structure.
3Length of stationary object
If mechanical polishing or chemical polishing is performed on substrates, then thinness is improved, but manufacturing complexity increases
Solution Approach 1:
The patent performs preliminary thinning of the second substrate during the substrate preparation stage, before assembly. This preliminary action reduces the need for complex post-assembly polishing processes, simplifying the overall manufacturing process while achieving the desired thinness.
Data Source
AI summary
According to one embodiment, a display device includes a first substrate including a pixel circuit, a second substrate disposed opposite to the first substrate, an optical element layer disposed between the first substrate and the second substrate, and a polarizer disposed between the second substrate and the optical element layer, wherein the second substrate has strength greater than that of the first substrate, and the second substrate constitutes the outermost substrate.