Projection Light Source Thermal Layout for Uniform LED Luminance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current light source units in projection-type display apparatuses face challenges in maintaining consistent performance due to temperature differences between light-emitting element groups, leading to reduced luminance and shortened lifespan of high-power light-emitting diodes.
Innovation Solution
A light source unit design featuring two light-emitting element groups with the same heat generation amount, where one region has a heat dissipation structure and the other region has a heat dissipation structure with higher efficiency, improving cooling efficiency and reducing temperature differences between regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high-power light-emitting diodes are used to increase luminance, then brightness is improved, but temperature increases causing reduced lifespan and performance degradation
Solution Approach 1:
The patent applies local quality by providing different heat dissipation structures for different light-emitting element groups. Specifically, a first heat dissipation structure is provided for a first light-emitting element group and a second heat dissipation structure is provided for a second light-emitting element group, where the second heat dissipation structure has higher heat dissipation efficiency than the first. This allows each region to have optimized heat dissipation characteristics tailored to its specific thermal requirements, enabling high-power LEDs to operate at higher luminance while maintaining reliability through localized thermal management.
2Device complexity
If uniform heat dissipation structures are used for all light-emitting element groups, then device complexity is reduced, but temperature differences between regions increase causing performance degradation
Solution Approach 1:
The patent implements local quality by differentiating heat dissipation structures across different regions. The first heat dissipation structure and second heat dissipation structure are designed with different heat dissipation efficiencies, allowing each light-emitting element group to operate at optimized temperature levels. This localized optimization reduces temperature differences between regions, preventing performance degradation while maintaining manageable device complexity through a systematic approach to thermal management.
3Temperature
If heat dissipation efficiency is increased in certain regions, then cooling efficiency is improved, but device complexity increases
Solution Approach 1:
The patent balances cooling efficiency improvement with device complexity by implementing localized heat dissipation enhancements only where needed. The second heat dissipation structure is designed with higher heat dissipation efficiency than the first, targeting specific light-emitting element groups that require superior thermal management. This selective approach improves overall cooling efficiency while minimizing the increase in device complexity by avoiding uniform overspecification across all regions.
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 the performance of the light source unit by reducing temperature differences and extending the lifespan of light-emitting elements while maintaining consistent luminance across the light source unit.
Implementation Method 1
a second heat dissipation structure provided in the second region, and having a heat dissipation characteristic equal to or greater than a heat dissipation characteristic of the first heat dissipation structure
Implementation Method 2
The first light-emitting element group and the second light-emitting element group have the substantially the same heat generation amount. The second heat dissipation structure has a higher heat dissipation efficiency than the first heat dissipation structure.
Data Source
AI summary
A light source unit according to one embodiment of the present disclosure includes a base member having one face and another face that face each other, and having a first region and a second region that are disposed side by side, a first light-emitting element group disposed in the first region of the one face, a second light-emitting element group disposed in the second region of the one face, and having substantially the same heat generation amount as the first light-emitting element group, a first heat dissipation structure provided in the first region, and a second heat dissipation structure provided in the second region, and having a heat dissipation characteristic equal to or greater than a heat dissipation characteristic of the first heat dissipation structure.