Dual Light-Shielding Layers for Display Patterning Accuracy
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Solution Overview
Problem
Conventional display apparatuses face challenges in forming accurate light-shielding layers due to material limitations and processing difficulties, leading to undesirable residues and poor production yield.
Innovation Solution
The light-shielding layer pattern is divided into two parts and fabricated separately on different substrates, with each part extending in a distinct direction, using materials with different optical density values to prevent residues and achieve precise light-shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single light-shielding layer is formed on one substrate, then the structure is simple, but the patterning accuracy is poor and residues occur
Solution Approach 1:
The light-shielding layer pattern is divided into two separate parts: a first light-shielding layer on the first substrate and a second light-shielding layer on the second substrate. Each layer is patterned independently, allowing for higher patterning accuracy on each individual substrate while maintaining overall structural simplicity through the division of functions.
2Ease of manufacture
If conventional materials and processing are used, then the manufacturing process is easy, but production yield is poor due to residues
Solution Approach 1:
By segmenting the light-shielding pattern into two separate layers on different substrates, each layer can be processed with optimized materials and methods suitable for its specific requirements. This reduces residue formation during patterning and improves production yield while keeping the overall manufacturing process manageable through modular fabrication.
Solution Approach 2:
Different materials with different optical density values are used for the first and second light-shielding layers. This parameter change allows optimization of patterning conditions for each layer, reducing residues and improving production yield while maintaining ease of manufacture through standard deposition and etching processes.
3Adaptability or versatility
If light-shielding materials with limited optical properties are used, then material selection is simple, but accurate light-shielding patterns cannot be formed
Solution Approach 1:
The invention utilizes materials with different optical density values for the first and second light-shielding layers. This parameter change enables precise control over light shielding characteristics in different regions, allowing accurate pattern formation while maintaining simple material selection from available options with varying optical properties.
Data Source
AI summary
A display apparatus includes a first substrate, a second substrate assembled to the first substrate, and several spacers disposed between the first substrate and the second substrate. The first substrate includes a first base plate and a first light-shielding layer disposed on the first base plate, wherein the first light-shielding layer includes several first light-shielding portions extending along a first direction. The second substrate includes a second base plate and a second light-shielding layer disposed on the second base plate, wherein the second light-shielding layer includes several second light-shielding portions extending along a second direction, and the second direction is different from the first direction.