LED Collimator Reflection Angle Optimization
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Solution Overview
Problem
Existing LED packages with 45° angled reflection surfaces have low brightness due to inefficient light collection and focusing, resulting in a low luminous flux.
Innovation Solution
A collimator with reflection surfaces angled between 70° and 110°, preferably 79° to 85°, to collect and focus light, reducing the light source area and increasing luminance and brightness by directing side-emitted light below the LED's front face, potentially smaller than the emitting area, and allowing for a compact design with reduced weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If 45° angled reflection surfaces are used, then the collimator can collect light from side faces, but the brightness and luminance are low
Solution Approach 1:
The patent changes the reflection angle parameter from the conventional 45° to a range of 70°-110° (preferably 75°-100°, most preferably 79°-85°). This parameter change optimizes the light reflection path to concentrate luminous flux into a smaller area, thereby increasing brightness and luminance while maintaining manufacturability
Solution Approach 2:
The patent extends the reflection surface below the front face level of the lighting element, utilizing the vertical dimension more effectively. This allows the reflection surface to capture light from side faces more efficiently and direct it through a reduced light source area, improving luminance without compromising light collection
2Illumination intensity
If the light source area is reduced, then luminance increases, but the collectable luminous flux decreases
Solution Approach 1:
By optimizing the reflection angle to 70°-110°, the patent achieves more efficient light concentration that maintains high luminous flux while reducing the light source area. The specific angle range maximizes the concentration effect without excessive loss of collectable flux
Solution Approach 2:
The patent segments the light collection function by using the reflection surface to redirect light from side faces through a specific path, separating the light collection area from the light emission area. This allows the light source area to be smaller while still capturing sufficient luminous flux through the optimized reflection geometry
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 enhances luminance and brightness by concentrating light flux into a smaller area, facilitating directed light emission and preventing blinding, while maintaining a compact and efficient assembly.
Implementation Method 1
at least one reflection surface provided by the collimator body, wherein the reflection surface is at least partially angled to the horizontal plane by an angle α
Data Source
AI summary
An LED package including a collimator body adapted to collect and/or reflect and/or focus light. An upper plane provided by the collimator body defines a mainly horizontal plane. At least one reflection surface is provided by the collimator body and is at least partially angled to the horizontal plane. The collimator body includes a recess for receiving a lighting element including a light emitting front face such that the reflection surface extends at least partially below the level of the front face in an assembled state. Due to the angle of the reflection surface with respect to the horizontal plane of the collimator body, a small light source and a high luminous flux at the same time are provided so that the luminance and the brightness of the LED package are increased.