Multi-faceted Lens Optimizing Luminous Efficiency
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Solution Overview
Problem
Existing multi-faceted lenses suffer from low luminous efficiency due to difficulties in achieving total internal reflection on the dummy surface of the light-receiving part, leading to a significant decrease in light irradiation efficiency, especially when used with LEDs that have a large radiation angle, causing the Etendue problem.
Innovation Solution
The multi-faceted lens design adjusts the size and number of total internal reflection lenses to minimize the loss area of the total internal reflection part, incorporating a light-receiving part, a total internal reflection part with one or more lenses, and a light-transmitting part, where the lenses are designed to optimize luminance efficiency and prevent glare by calculating the loss area using specific equations and optimizing the radius and cutting angles of the lenses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple total internal reflection lenses are added to the light-receiving part, then light collection capability is improved, but luminous efficiency decreases due to increased loss area
Solution Approach 1:
The light-receiving part is divided into multiple light-receiving surfaces (first, second, third light-receiving surfaces) with different orientations. Each surface is equipped with its own total internal reflection lens, allowing independent optimization of each lens's size and position to minimize loss area while maintaining effective light collection from different angles.
Solution Approach 2:
Each total internal reflection lens is designed with locally optimized properties - the first lens has a larger area to capture light from the first light-receiving surface, while subsequent lenses have progressively smaller areas. The loss area of each lens is calculated and minimized individually based on its specific position and function in the overall light collection system.
2Area of stationary object
If the number of total internal reflection lenses is increased, then light irradiation coverage is improved, but glare phenomenon occurs
Solution Approach 1:
The light transmission system is segmented into multiple light-transmitting surfaces (first, second, third light-transmitting surfaces) with different orientations. Each surface transmits light in a different direction, distributing the irradiated light across multiple zones rather than concentrating it, thereby preventing glare while maintaining wide coverage.
Solution Approach 2:
The patent introduces spatial dimensionality by orienting light-transmitting surfaces in different directions (first surface in first direction, second surface in second direction, third surface in third direction). This multi-directional light transmission distributes light intensity across different spatial zones, preventing concentration of light that causes glare while expanding overall irradiation coverage.
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 design enhances luminous efficiency by minimizing optical loss and preventing glare, achieving optimized luminance efficiency and maintaining high luminous intensity while reducing the number of total internal reflection lenses, thereby improving the overall performance of the lens system.
Implementation Method 1
a total internal reflection part disposed outside the light-receiving part and having a total internal reflection lens which collects the light irradiated by the light source
Implementation Method 2
a light-receiving part disposed in front of a light source, light irradiated by the light source passing through the light-receiving part
Data Source
AI summary
Provided is a multi-faceted lens. The multi-faceted lens includes a light-receiver disposed in front of a light source, a total internal reflector disposed outside the light-receiver and equipped with a total internal reflection lens for collecting the light irradiated by the light source, and a light-transmitter disposed in front of the light-receiver to irradiate the light, supplied from the light-receiver and the total internal reflector, onto the outside. Light irradiated by the light source passes through the light-receiver.