UV LED Lens Array with Standardized Convex Shapes
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Solution Overview
Problem
The use of glass lenses in UV LED applications increases manufacturing costs due to the need for large molds and various shapes for light concentration, while plastic lenses are damaged by ultraviolet light.
Innovation Solution
A lighting device with a lens array comprising sequentially arranged convex lenses, where the first and fourth lenses have the same shape and dimensions, and the second and third lenses have the same shape and dimensions, optimized for UV light emission, reducing the need for multiple molds and enhancing light concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If glass lenses are used in UV LED applications, then the lenses can withstand ultraviolet light, but manufacturing costs increase due to the need for large molds and various shapes
Solution Approach 1:
The patent changes the material parameter from glass to plastic, and modifies the shape parameter by using multiple lenses with different curvatures (first and second curvatures) to achieve the desired light concentration while using a single mold type, thereby reducing manufacturing costs while maintaining UV resistance
Solution Approach 2:
The patent divides the optical system into multiple plastic lenses (first lens, second lens, third lens) with different shapes and curvatures, allowing each lens to contribute to light concentration while using a standardized single-mold design, thus achieving both UV resistance and cost reduction
2Illumination intensity
If multiple shapes of glass lenses are used for light concentration, then light concentration effectiveness is improved, but manufacturing costs increase due to requiring various molds
Solution Approach 1:
The patent changes the curvature parameter of plastic lenses to create different optical effects (first curvature for light concentration, second curvature for light emission) while maintaining the same basic lens shape and mold type, thus achieving effective light concentration without requiring multiple mold types
Solution Approach 2:
The patent designs a universal lens shape that can serve multiple functions: the first lens concentrates light using a first curvature, while the second and third lenses emit light using a second curvature, all manufactured from the same single mold type, thereby achieving multi-functionality without increasing mold variety
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 achieves cumulative power equal to or greater than 60% and reduces manufacturing costs by standardizing lens shapes and sizes, ensuring effective light concentration and emission.
Implementation Method 1
a lens array including first to fourth lenses sequentially arranged in a line in a first direction, wherein each of the first to fourth lenses is a convex lens
Data Source
AI summary
Embodiments include: a light emitting diode for emitting light; and a lens array including first to fourth lenses sequentially arranged in line in a first direction, wherein the first to fourth lenses are each convex lenses, the first lens and the fourth lens are the same in shape, the second lens and the third lens are the same in shape, the first and second lenses are each arranged in convex configurations in the first direction, the third and fourth lenses are each arranged in convex configurations in the direction opposite to the first direction, and the first direction is a direction oriented toward the first lens from the light emitting diode.