LED Lens with Recess and Critical Reflection Surface for Uniform Illumination
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Solution Overview
Problem
Traditional lighting systems, such as halogen and incandescent, suffer from high power consumption and inefficient light dispersion, while early LED systems provide mediocre light output, leading to non-uniform illumination, especially in larger areas where light intensity varies with distance from the source.
Innovation Solution
An illumination system incorporating an LED module with a custom-designed lens featuring a light source recess, critical reflection surface, and multiple convex lenses to refract and reflect light uniformly across the illuminated area, ensuring consistent luminance regardless of distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional incandescent or halogen lighting is used, then high light output is achieved, but power consumption is high and light dispersion efficiency is poor
Solution Approach 1:
The patent transitions from traditional incandescent/halogen light sources to LED technology, fundamentally changing the operating parameters and mechanism of light generation. This parameter change enables significantly lower power consumption while maintaining or improving light output, directly resolving the contradiction between illumination intensity and energy use.
2Use of energy by moving object
If LED with narrow beam optic is used, then power consumption is reduced, but illumination uniformity across large areas deteriorates
Solution Approach 1:
The illumination system is divided into multiple LED modules, each responsible for illuminating a specific zone. This segmentation allows each module to maintain its energy efficiency while the collective system achieves uniform illumination across the entire target area, resolving the contradiction between power consumption and illumination uniformity.
Solution Approach 2:
The patent transitions from point-source illumination to an array of distributed LED modules arranged in a two-dimensional configuration. This dimensional change enables light to be delivered uniformly across large areas without requiring high-power single-source emission, thus maintaining energy efficiency while improving illumination uniformity.
3Illumination intensity
If LED modules are positioned close to illuminated area, then light intensity is high, but attenuation variation across the area increases
Solution Approach 1:
By segmenting the illumination into multiple modules distributed across the target area, the system ensures that no single point is too far from a light source. This segmentation maintains consistent light intensity across the entire area while preventing excessive attenuation variation, resolving the contradiction between intensity and intensity consistency.
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 system achieves a uniform illumination pattern by optimizing light distribution through the use of a lens with specific design parameters for the LED module, providing consistent light intensity across the illuminated area, addressing the limitations of traditional lighting systems.
Implementation Method 1
a lens (11) including a light source recess (111) for receiving the light source, a first light emitting surface (112) opposite to the light source recess (111), a critical reflection surface (113) formed between the light source recess (111) and the first light emitting surface (112), and a second light emitting surface (114) formed between the light source recess (111) and the first light emitting surface (112)
Implementation Method 2
a critical reflection surface (113) formed between the light source recess (111) and the first light emitting surface (112)
Data Source
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AI summary
An illumination system includes at least an LED module, and at least an illuminated area. The LED module includes an LED, and a lens mounted in light path of the LED. The lens includes a light source recess, a first light emitting surface, a critical reflecting surface, and a second light emitting surface. The first light emitting surface can receive more light quantity than the second light emitting surface. In result, although the light emitted from the first light emitting surface may have greater attenuation than the light emitted from the second light emitting surface ,light emitted from the first light emitting surface , which is father to the illuminated are, can make up the intensity losses of attenuation as the first light emitting surface receives more light quantity than the second light emitting surface. As a result, the illumination system have uniform illumination pattern.