Inverted Truncated Hexagonal Pyramid Collimator Lens for Dense Light Source Arrangement
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Solution Overview
Problem
Conventional light source units with collimator lenses shaped like a paraboloid of revolution are large in size, making it difficult to arrange light emitting elements densely, which complicates the cooling mechanism and increases the size of projector light sources.
Innovation Solution
A light source unit with a collimator lens of an inverted truncated hexagonal pyramid shape, featuring a flat surface at the center and inclined surfaces around the perimeter, allowing for the formation of parallel light rays and enabling denser packing of light emitting elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a collimator lens is formed into a paraboloid of revolution shape, then light can be effectively collimated, but the external shape becomes large, preventing high-density arrangement of light emitting elements
Solution Approach 1:
The patent applies asymmetry by changing the collimator lens from a symmetric paraboloid of revolution shape to an asymmetric inverted truncated hexagonal pyramid shape. This asymmetric geometry reduces the external dimensions of the lens while maintaining its light collimating function, thereby enabling high-density arrangement of light emitting elements without compromising illumination quality
Solution Approach 2:
The patent changes the geometric parameters of the collimator lens by transitioning from a curved paraboloid surface to a polyhedral inverted truncated hexagonal pyramid structure. This parameter change in the lens shape achieves compact dimensions while preserving the optical collimation capability, resolving the contradiction between lens size and collimation effectiveness
2Power
If light emitting elements are arranged densely, then high-luminance light source can be achieved, but the cooling mechanism becomes complicated and large in size
Solution Approach 1:
The patent applies segmentation by dividing the cooling function into individual modular cooling units, each integrated with a specific light emitting element. This segmentation allows each element to have its own dedicated cooling mechanism, enabling high-density arrangement of light emitting elements while keeping the overall cooling system compact and manageable rather than complicated
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
This configuration reduces the size of the collimator lens and allows for highly dense arrangement of light source units, providing a high-luminance light source apparatus while minimizing the size and complexity of the cooling mechanism.
Implementation Method 1
a collimator lens for forming light emitted from the sealing portion into a bundle of parallel rays of light for emission therefrom
Implementation Method 2
light emitting elements such as light emitting diodes or the like are arranged in an array or arrays
Data Source
AI summary
A light source unit includes a light emitting element, a substrate on which the light emitting surface is disposed, a sealing portion which transmits light from the light emitting surface, and a collimator lens having an inverted truncated hexagonal pyramid shape for forming light emitted from the sealing portion into a bundle of parallel rays of light, the sealing portion having two or more convexly curved surfaces which project in a direction in which light is emitted therefrom.