Anti-Glare Light Transmission Surface for Clear Display Visibility
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Solution Overview
Problem
Molded articles with light transmission portions used in applications like automobile dashboards face difficulties in displaying content clearly due to external light interference, causing glare issues.
Innovation Solution
The molded article incorporates a light transmission portion with recesses and protrusions on its surface, designed to diffuse external light, achieving anti-glare properties by controlling surface roughness, peak-valley intervals, and haze values, which enhances visibility of display content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a smooth surface is used on the light transmission portion, then light transmission efficiency is improved, but glare from external light increases making display content difficult to view
Solution Approach 1:
The patent applies different surface qualities to different regions of the light transmission portion. The surface is configured with recesses and protrusions (anti-glare structure) in specific areas while maintaining other regions for optimal light transmission. This local differentiation allows the surface to simultaneously achieve good light transmission efficiency and effective glare reduction by having different optical properties in different locations.
Solution Approach 2:
The patent employs curved surface features in the form of recesses and protrusions rather than flat surfaces. These curved structures diffuse external light through multiple refraction and reflection paths, reducing glare. The curvature of these surface features is specifically designed to scatter light effectively while maintaining overall light transmission capability.
2Object-affected harmful factors
If recesses and protrusions are formed on the surface to reduce glare, then anti-glare properties are improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies precise parameter ranges for the anti-glare surface features to balance glare reduction with manufacturing feasibility. The center line average surface roughness Ra is controlled within 0.01-2.0 μm, peak-valley interval Sm within 1-500 μm, and inclination angle θa within 0.001°-10°. These parameter specifications provide clear manufacturing targets that achieve effective anti-glare properties while considering practical manufacturing capabilities.
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-glare surface treatment effectively reduces glare, ensuring clear visibility of display content even under external light exposure, improving the functionality and aesthetics of the molded article.
Implementation Method 1
external light when impinging on the surface of the light transmission portion is diffusely reflected on the surface of the light transmission portion
Data Source
AI summary
A molded article includes a light transmission portion disposed in superposition with a display portion of a display device, the light transmission portion transmitting light from the display portion. Recesses and protrusions are formed on a surface of the light transmission portion opposite to the display portion, and thus the surface has anti-glare properties.