Display Panel Gate Layer Composite Structure for Reflectance Reduction
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Solution Overview
Problem
Conductive layers in large-sized display panels made of metals like Cu result in high visible light reflectance, affecting the visual effect due to lack of blockage, and are prone to galvanic corrosion.
Innovation Solution
A display panel design featuring a gate layer with a first conductive metal layer, a molybdenum alloy layer, and a molybdenum oxide alloy layer sequentially stacked, along with a buffer layer, to reduce light reflectance and prevent galvanic corrosion, using materials like copper, aluminum, silver, titanium, nickel, tantalum, tungsten, or niobium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a Cu film is used for the gate layer, then electrical conductivity is improved, but light reflectance increases and galvanic corrosion occurs
Solution Approach 1:
The gate layer uses a composite structure combining Cu film with Mo alloy layer and Mo oxide alloy layer. The Cu film provides electrical conductivity while the Mo-based layers reduce light reflectance and prevent galvanic corrosion, creating a multi-functional composite material system that resolves the contradiction between conductivity and harmful optical effects
Solution Approach 2:
The Mo alloy layer and Mo oxide alloy layer act as intermediary layers between the Cu film and the environment. These intermediate layers prevent direct exposure of the Cu film to moisture and oxygen, thereby preventing galvanic corrosion, while also serving as optical control layers to reduce light reflectance without compromising the electrical conductivity of the underlying Cu film
2Object-generated harmful factors
If Mo alloy layer and Mo oxide alloy layer are added, then light reflectance is reduced and corrosion resistance is improved, but device complexity increases
Solution Approach 1:
The gate layer is segmented into multiple functional sub-layers: Cu film for conductivity, Mo alloy layer for intermediate protection and optical control, and Mo oxide alloy layer for enhanced corrosion resistance and optical management. This segmentation allows each layer to be optimized for its specific function while collectively resolving the contradictions, with the added complexity justified by the multiple benefits achieved
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 effectively reduces light reflectance on the surface of the display panel, enhancing the visual effect while preventing galvanic corrosion, and is cost-effective by optimizing the thickness of the molybdenum alloy and oxide layers.
Implementation Method 1
A reflectance of visible light of a surface of the Cu film reaches 90%, and there is no blockage. The visible light reaching the surface of the Cu film will be reflected, causing the reflectivity of the products to be high and affecting visual effect.
Implementation Method 2
prone to galvanic corrosion
Data Source
AI summary
The present disclosure provides a display panel, which includes a base substrate and an array layer disposed on the base substrate. The array layer includes a gate layer disposed on the base substrate; and the gate layer includes a first conductive metal layer, and a first molybdenum alloy layer and a first molybdenum oxide alloy layer sequentially stacked on the first conductive metal layer.