Spacer Overlap Design for Display Device Holding Force
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Solution Overview
Problem
Existing display devices face challenges in improving the holding force of spacers, which affects the stability and image quality, especially in high-resolution applications like head-mounted displays.
Innovation Solution
A display device design that includes a substrate with a transistor, a first electrode connected to the transistor, and a spacer disposed on the first electrode, where the spacer overlaps the connection portion between the transistor and the first electrode, enhancing the holding force and minimizing reflectance differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the spacer is disposed away from the connection portion between the transistor and the first electrode, then the manufacturing process is simpler, but the holding force of the spacer is insufficient
Solution Approach 1:
The spacer is positioned in the planar view to overlap the connection portion between the transistor and the first electrode, utilizing the horizontal dimension rather than vertical stacking. This dimensional approach allows the spacer to engage with the connection portion without adding vertical complexity to the manufacturing process, thereby improving holding force while maintaining manufacturing simplicity.
2Strength
If the spacer is disposed to overlap the contact hole, then the holding force is improved, but the reflectance difference between areas with and without contact holes increases
Solution Approach 1:
The spacer is designed with a black color specifically at the portion overlapping the contact hole, while other portions may have different properties. This local quality change addresses the reflectance issue only where necessary (at the contact hole area) without affecting the entire spacer structure, thereby maintaining holding force while minimizing reflectance differences.
3Object-affected harmful factors
If the spacer has a black color to reduce external light reflection, then image quality improves, but the manufacturing complexity increases
Solution Approach 1:
Only the portion of the spacer overlapping the contact hole is configured with a black color, rather than making the entire spacer black. This localized approach reduces external light reflection at the critical contact hole area while minimizing the overall manufacturing complexity and material requirements.
Data Source
AI summary
The present disclosure relates to a display device, and more particularly, to a display device capable of improving the holding force of a spacer. The display device may include a substrate; a transistor on the substrate; a first electrode connected to the transistor, and a spacer disposed on the first electrode, wherein the spacer overlaps a connection portion between the transistor and the first electrode.