LED Module Light Directing Element for Luminance and Thermal Management
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Solution Overview
Problem
Current LED modules face limitations in maximum attainable brightness and heat dissipation, constraining their size and efficiency, even with high power LEDs and closely spaced configurations.
Innovation Solution
An LED module design featuring a light directing element with a smaller output window perpendicular to the LED assembly's output window, allowing for increased size and improved thermal management, along with wavelength conversion capabilities to enhance brightness and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high power LEDs and closely spaced LEDs are used to increase luminance, then brightness is improved, but heat dissipation requirements increase and limit available size and efficiency
Solution Approach 1:
The patent introduces a light directing element positioned at a 45-degree angle to redirect light from a first output window to a second output window in a perpendicular plane. This dimensional reconfiguration allows the LED assembly to maintain a larger area for heat dissipation while concentrating light output through the smaller second window, effectively separating thermal management space from optical output space.
2Temperature
If the LED assembly area is increased to improve heat dissipation and luminance, then heat management and brightness are improved, but the light output window size increases
Solution Approach 1:
By positioning the light directing element at 45 degrees and creating a perpendicular output plane, the patent enables the light output to be directed through a smaller second window area while the LED assembly maintains a larger area for heat dissipation. The dimensional transformation decouples the relationship between assembly size and output window size.
Solution Approach 2:
The light directing element acts as an intermediary between the LED assembly's first output window and the final light output. This mediator redirects light from a larger area through optical redirection to a smaller second output window, enabling concentration of light output while maintaining larger LED assembly area for thermal management.
3Illumination intensity
If closely spaced LEDs are used to increase luminance, then brightness is improved, but heat dissipation challenges increase
Solution Approach 1:
The patent uses the light directing element positioned at 45 degrees to create a perpendicular output plane, allowing the LED assembly to be configured with closely spaced LEDs for high luminance while the redirected light exits through a smaller second window. This dimensional approach simplifies thermal management by separating the high-density LED region from the light output path.
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 achieves a more concentrated and efficient light output, increasing luminance and enabling larger LED assemblies with enhanced heat dissipation, while maintaining a compact light exit window.
Implementation Method 1
the light directing element is further adapted to, upon receiving light of a first wavelength at the first input window, emit further light having a different wavelength such that the light output at the second output window has a greater range of wavelengths than light received at the first input window
Data Source
AI summary
The invention provides an LED module having a concentrated light output window. Light output from a first output window of an LED assembly (e.g. from a plurality of LEDs) is passed to an input window of a light directing element and redirected to be emitted from a second, smaller output window of a light directing element. This difference in size thereby concentrates the light output by the light directing element. The second output window (of the light directing element) is substantially perpendicular to the first output window, allowing for the size of the LED assembly in a particular dimension to not be necessarily constrained by the size of the second output window.