Segmented LED Submounts for Homogeneous Lighting
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Solution Overview
Problem
In bright lamps using multiple LEDs, achieving a homogeneous light composition is optically complex due to thermal and electrical effects, making it difficult to mount all LEDs side by side effectively.
Innovation Solution
A lighting unit comprising multiple submounts, each with multiple light sources of identical or differing colors, arranged to provide a predetermined color composition through adjustable ratios and orientations, connected in series, and mounted on a printed circuit board for efficient thermal management and light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple LEDs are mounted directly side by side in bright lamps, then the illumination intensity increases, but thermal and electrical effects cause non-uniform light distribution and make it difficult to achieve homogeneous lighting
Solution Approach 1:
The lighting unit is divided into multiple submounts, each containing multiple light sources. This segmentation allows independent thermal management and optical optimization for each submount, enabling homogeneous light distribution across the entire lighting unit while maintaining high illumination intensity through the collective output of all submounts.
2Stability of the object's composition
If multiple LEDs are arranged to achieve homogeneous light composition, then the light distribution becomes uniform, but the optical system becomes complex
Solution Approach 1:
Multiple submounts are combined in a structured arrangement where each submount contains multiple light sources configured to produce homogeneous light. This merging approach achieves uniform light distribution across the entire lighting unit while keeping individual submounts relatively simple in design, reducing overall optical complexity compared to attempting homogeneous distribution from a single complex arrangement.
3Stability of the object's composition
If multiple submounts with multiple light sources are used, then homogeneous lighting and thermal management are improved, but the device structure becomes more complex
Solution Approach 1:
The lighting unit is segmented into multiple identical or similar submounts, each containing multiple light sources. This segmentation provides modular thermal management and optical design, allowing each submount to be optimized independently while maintaining overall homogeneity. The modular structure actually reduces complexity compared to a monolithic design, as each submount can be standardized and manufactured separately.
4Reliability
If LEDs are arranged in series connections across submounts, then electrical control and thermal management are improved, but the manufacturing and assembly process becomes more complex
Solution Approach 1:
The electrical system is segmented into series-connected submounts, with each submount containing multiple light sources. This segmentation allows for modular assembly where each submount can be tested and assembled independently, then connected in series. This approach improves reliability through series connection while making manufacturing more manageable through modular units compared to assembling all light sources in a single complex circuit.
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 enables scalable, efficient, and homogeneous lighting with identical or varying color outputs, effective heat management, and simplified production and logistics, allowing for flexible lamp designs with consistent color and brightness.
Implementation Method 1
light emitting diodes (LEDs) are used in lamps for universal illumination
Implementation Method 2
a light composition onto a target color location (chromaticity coordinates) is particularly effected
Implementation Method 3
achieve a respective homogeneous light composition
Implementation Method 4
due to thermal as well as electrical effects no longer all of the LEDs can be mounted directly side by side
Data Source
AI summary
A lighting unit has at least two submounts, wherein each submount has multiple light sources. Furthermore, a lamp may have such a lighting unit.