Semiconductor Laser Reflection Layout for Heat Dissipation
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Solution Overview
Problem
Existing light-emitting devices face challenges in effectively dissipating heat, which can impact their performance and reliability.
Innovation Solution
The design incorporates a package structure with specific reflection regions for light emitted from semiconductor laser elements, optimizing the distance and divergence angles to enhance heat dissipation and improve thermal management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the distance from the light-emitting point to the reflection region is increased, then the heat dissipation is improved, but the light intensity at the reflection region decreases
Solution Approach 1:
The reflection regions are designed with different distances from light-emitting points according to the specific divergence angles of different semiconductor laser elements. Each reflection region is locally optimized to receive sufficient light intensity while maintaining effective heat dissipation, rather than using a uniform distance for all elements.
Solution Approach 2:
The invention changes the parameter of distance from the light-emitting point to the reflection region based on the divergence angle characteristics of different laser elements. By adjusting this distance parameter individually for each element, the system achieves both adequate light intensity and effective heat dissipation simultaneously.
2Area of stationary object
If the angle of divergence is increased to cover larger area, then the light distribution is improved, but the focus on reflection region is reduced
Solution Approach 1:
Different reflection regions are positioned at different distances from their respective light-emitting points, creating local optimization for each laser element. This allows each element to effectively utilize its specific divergence angle to illuminate its corresponding reflection region with appropriate intensity and coverage.
Solution Approach 2:
The invention changes the positional parameter of reflection regions relative to light-emitting points to match the divergence angle characteristics of different semiconductor laser elements, thereby achieving optimal light focus and coverage area simultaneously.
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 provides a light-emitting device with enhanced heat dissipating properties, leading to improved performance and reliability by effectively managing thermal issues.
Implementation Method 1
The first reflection region is configured to reflect the first light emitted from the first semiconductor laser element. The second reflection region is configured to reflect the second light emitted from the second semiconductor laser element.
Data Source
AI summary
A light-emitting device includes first and second semiconductor laser elements, a package, and first and second reflection regions. The first and second reflection regions are configured to respectively reflect first and second lights emitted from the first and second semiconductor laser elements. A distance from a first light-emitting point to a first irradiation spot on the first reflection region irradiated with light propagating along an optical axis of the first light is shorter than a distance from the second light-emitting point to a second irradiation spot on the second reflection region irradiated with light propagating along an optical axis of the second light. The first light has an angle of divergence in a fast-axis direction greater than an angle of divergence in the fast-axis direction which the second light has.