Polydopamine Graphene Oxide BPS Light-Shielding Layer
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Solution Overview
Problem
Current black photo spacer (BPS) materials in display substrates exhibit insufficient light-shielding and nonuniformity due to difficulties in controlling shape and size, leading to inadequate light-shielding and uneven liquid crystal distribution.
Innovation Solution
A display substrate with a BPS light-shielding layer made of a composite material comprising polydopamine and graphene oxide, which forms a chemical bond with a photoresist material, enhancing adhesion and light-shielding properties, and featuring matrix-distributed spacers for improved uniformity and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional BPS materials are used, then the manufacturing process is simple, but the light-shielding effect is insufficient and liquid crystal distribution is nonuniform
Solution Approach 1:
The patent applies composite materials by combining polydopamine and graphene oxide to create a BPS light-shielding layer that achieves both superior light-shielding effect and uniform liquid crystal distribution. The composite structure leverages the properties of both materials: polydopamine provides adhesion and structural integrity, while graphene oxide contributes to optical properties and uniformity.
Solution Approach 2:
The patent utilizes parameter changes by controlling the mass ratio of graphene oxide to polydopamine within the range of 1:2 to 1:5. This parameter optimization ensures that the composite material achieves the desired balance between light-shielding performance, adhesion strength, and liquid crystal uniformity.
2Manufacturing precision
If conventional BPS materials are used, then the manufacturing process is straightforward, but the shape and bottom size control is difficult
Solution Approach 1:
The patent employs parameter changes by optimizing the mass ratio of graphene oxide to polydopamine (1:2 to 1:5), which enables precise control over the shape and bottom size of the BPS light-shielding layer during manufacturing, achieving both high precision and ease of manufacture.
Solution Approach 2:
The composite material structure of polydopamine and graphene oxide provides inherent properties that facilitate precise shape and size control during the manufacturing process, while maintaining manufacturing simplicity through the synergistic effects of the composite components.
3Strength
If conventional BPS materials are used, then the production cost is lower, but the binding force between layers is insufficient
Solution Approach 1:
The patent applies composite materials by combining polydopamine and graphene oxide, where polydopamine specifically provides strong adhesion and binding force between layers. The composite structure enhances the binding force while maintaining reasonable material composition complexity.
Solution Approach 2:
The patent utilizes parameter changes by optimizing the mass ratio of graphene oxide to polydopamine within the range of 1:2 to 1:5, which ensures adequate binding force between layers while controlling the complexity of material composition.
4Stability of the object's composition
If conventional BPS materials are used, then the material composition is simple, but the liquid crystal distribution is nonuniform
Solution Approach 1:
The patent applies composite materials by combining polydopamine and graphene oxide, where the synergistic properties of this composite structure ensure uniform liquid crystal distribution. The composite material provides both compositional stability and uniformity in liquid crystal arrangement.
Solution Approach 2:
The patent employs parameter changes by optimizing the mass ratio of graphene oxide to polydopamine (1:2 to 1:5), which achieves uniform liquid crystal distribution while maintaining stable material composition.
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
The composite material with polydopamine and graphene oxide improves light-shielding efficacy and ensures uniform liquid crystal distribution, enhancing display quality by strengthening the binding force between the BPS light-shielding layer and the substrate while simplifying the manufacturing process.
Implementation Method 1
the composite material including polydopamine and graphene oxide of the BPS light-shielding layer and the photoresist material of the first planar layer form a chemical bond
Implementation Method 2
the BPS light-shielding layer is made of a composite material including polydopamine and graphene oxide... has characteristics of black matrix materials, such as a higher optical density (OD) value to shielding light
Data Source
AI summary
The present disclosure provides a display panel, a display substrate, and a manufacturing method thereof. The display substrate comprises a substrate, a first planar layer, and a BPS light-shielding layer. Wherein the BPS light-shielding layer is made of a composite material including polydopamine and graphene oxide, which can strengthen a binding force between the BPS light-shielding layer and the first planar layer and improve light-shielding effect of the BPS light-shielding layer. The manufacturing method of the display substrate is simple, and making liquid crystals uniformly filled, thereby improving display quality of panels.