Display Panel Black Matrix Layer Reflectivity Reduction
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Solution Overview
Problem
Existing display panels face challenges in achieving low reflection and improved adhesive strength between the seal pattern and display substrate, which affects visibility and reliability.
Innovation Solution
A display panel design incorporating a black matrix layer with a low reflection layer and a light blocking layer, using metal oxides like chromium oxide, indium oxide, and gallium oxide, and a manufacturing method that forms these layers on the substrate to enhance light blocking and adhesive properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional black matrix layer is used, then the structure is simple, but the reflectivity is high and adhesive strength is insufficient
Solution Approach 1:
The black matrix layer is constructed as a composite structure with a low reflection layer (metal oxide such as chromium oxide, indium oxide, gallium oxide) and a light blocking layer (metal material such as chromium, copper, or titanium). This composite material approach reduces reflectivity to 1.8-3.8% while maintaining structural integrity and adhesive strength.
2Reliability
If a conventional single-layer black matrix is used, then the manufacturing process is simple, but the adhesive strength between seal pattern and display substrate is insufficient
Solution Approach 1:
The two-layer composite black matrix structure with metal oxide and metal material provides enhanced adhesive strength for the seal pattern while preventing moisture intrusion. The manufacturing process involves forming the low reflection layer first, then forming the light blocking layer on top, which can be integrated into existing manufacturing workflows.
3Manufacturing precision
If a conventional black matrix layer is used, then the manufacturing process is simple, but color reproducibility is poor
Solution Approach 1:
The combination of metal oxide in the low reflection layer and metal material in the light blocking layer creates optimal optical properties for color reproducibility. The metal oxide provides low reflection characteristics while the metal material provides strong light blocking, together achieving superior color accuracy.
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 solution reduces reflectivity to 1.8-3.8% and improves color reproducibility while enhancing the adhesive strength of the sealing member, preventing moisture intrusion and improving display panel reliability.
Implementation Method 1
The low reflection layer includes a metal oxide obtained from the metal material included in the light blocking layer... The black matrix layer has a reflectivity of about 1.8% to about 3.8% with respect to the external light
Implementation Method 2
The light blocking layer includes a metal material... The black matrix layer includes a low reflection layer disposed on the lower surface of the first base substrate and a light blocking layer disposed on the low reflection layer
Data Source
AI summary
A display panel includes a first base substrate that includes an upper surface to which an external light is incident and a lower surface facing the upper surface and includes a plurality of pixel areas and a peripheral area adjacent to the pixel areas when viewed in a plan view, a plurality of pixels disposed on the lower surface of the first base substrate to respectively correspond to the pixel areas, and a black matrix layer disposed between the pixels and the lower surface of the first base substrate to overlap the peripheral area. The black matrix layer includes a low reflection layer disposed on the lower surface of the first base substrate and a light blocking layer disposed on the low reflection layer.