Display Panel Anti-Reflective Film for Ambient Light Suppression
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Solution Overview
Problem
Existing display devices struggle with high reflectivity of ambient light, which affects visual quality and contrast, particularly in applications requiring improved visual effects.
Innovation Solution
Incorporating a stacked structure of high and low refractive index layers in an anti-reflective film on the display panel, with specific thickness ratios to achieve destructive interference, reducing ambient light reflectivity and enhancing visual effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional single-layer anti-reflective coating is applied, then the manufacturing process is simple, but the reflectivity reduction effect is insufficient
Solution Approach 1:
The anti-reflective film is divided into multiple layers (first anti-reflective layer, second anti-reflective layer, third anti-reflective layer) with different refractive indices and thicknesses. Each layer contributes to reducing reflectivity at different wavelengths and angles, achieving superior overall anti-reflective performance compared to a single-layer coating.
Solution Approach 2:
The patent uses composite material structure with layers having different refractive indices (e.g., TiO2 with high refractive index and SiO2 with low refractive index). This composite structure creates destructive interference for reflected light waves, significantly reducing ambient light reflectivity while maintaining manufacturing feasibility.
2Object-affected harmful factors
If the thickness of anti-reflective layers is increased to improve reflectivity reduction, then the anti-reflective effect is enhanced, but the device becomes thicker
Solution Approach 1:
The patent optimizes the thickness parameters of each anti-reflective layer to achieve the desired anti-reflective effect. By precisely controlling the thickness of each layer (e.g., first layer: 50-150nm, second layer: 100-200nm, third layer: 50-150nm), the design achieves effective reflectivity reduction while maintaining a compact overall thickness suitable for modern display devices.
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 anti-reflective film significantly reduces ambient light reflectivity and improves contrast, ensuring the reflected light meets specific hue conditions in the CIE L*a*b* color space, enhancing visual performance.
Implementation Method 1
the anti-reflective film includes a first high refractive index layer and a first low refractive index layer stacked in sequence
Implementation Method 2
A thickness of the first high refractive index layer is greater than a thickness of the first low refractive index layer
Data Source
AI summary
A display device includes a display panel and an anti-reflective film. The anti-reflective film is disposed on the display panel. The anti-reflective film includes a first high refractive index layer and a first low refractive index layer stacked in sequence. A thickness of the first high refractive index layer is greater than a thickness of the first low refractive index layer. Under irradiation of a CIE standard illuminant D65 light source, a reflected light of the display device satisfies the following conditions in the CIE L*a*b* color space: 0≥a*≥−6 and 0≥b*≥−6. The display device of the disclosure may reduce reflectivity of ambient light or improve visual effects.