Lens Device with Patterned Light Shielding for Color Uniformity
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Solution Overview
Problem
Conventional light emitting devices using LEDs result in non-uniform light color output due to light emission from both the middle and periphery surfaces of the lens, leading to color inconsistencies.
Innovation Solution
A lens device with a patterned light shielding layer is introduced, where the patterned light shielding layer is formed on the periphery light emitting surface of the lens to reduce color differences by shielding light output from this surface, thereby enhancing the uniformity of the emitted light color.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light is emitted from both the middle and periphery surfaces of the lens, then the light output intensity is increased, but the light color uniformity deteriorates
Solution Approach 1:
The lens light emitting surface is segmented into two distinct regions: a middle light emitting surface and a periphery light emitting surface. The patterned light shielding layer is selectively applied to the periphery region, creating spatial segmentation that allows different parts of the lens to serve different functions - the middle region provides primary light emission while the periphery region's light is selectively blocked to maintain color uniformity.
Solution Approach 2:
The patterned light shielding layer is applied locally to specific regions of the periphery light emitting surface rather than uniformly across the entire lens. This local application allows selective control of light emission from different areas, blocking periphery light that would cause color non-uniformity while preserving the optical properties of the middle region.
2Stability of the object's composition
If a patterned light shielding layer is formed on the periphery light emitting surface, then the light color uniformity is improved, but the device complexity increases
Solution Approach 1:
The patterned light shielding layer is designed with specific optical properties that selectively block or modify light from the periphery region. The layer's optical characteristics are engineered to address the color non-uniformity issue by controlling the spectral composition of light emitted from different regions of the lens.
Solution Approach 2:
The lens device combines multiple materials with different optical properties: the lens material itself and the patterned light shielding layer material. This composite structure allows the device to simultaneously achieve light emission and color uniformity control by leveraging the complementary optical properties of different materials.
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 patterned light shielding layer effectively reduces the color difference between light emitted through the middle and periphery surfaces of the lens, resulting in more uniform light output, as demonstrated by the comparison of color distribution curves before and after its implementation.
Implementation Method 1
The patterned light shielding layer is formed on the periphery light emitting surface of the lens to reduce color differences by shielding light output from this surface
Data Source
AI summary
A lens device and a light source module using the same are provided. The lens device comprises a lens and a patterned light shielding layer. The lens has a middle light emitting surface and a periphery light emitting surface surrounding the middle light emitting surface. The patterned light shielding layer is formed on the periphery light emitting surface of the lens.