Reflector Cooling Body for LED Lamp Spatial Angle
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Solution Overview
Problem
LED lamps often face a trade-off between omnidirectional light emission and effective cooling, as larger cooling bodies are required to manage heat, which restricts the design and reduces the spatial angle range of illumination, particularly in retrofit lamps where maintaining external dimensions is crucial.
Innovation Solution
A semiconductor lamp design featuring a reflector with a lower side and an upper side separated by a rim, where the reflector acts as both a cooling body and a light reflector, allowing for enhanced heat dissipation and omnidirectional light emission by utilizing a second light source group to illuminate shaded regions, thereby expanding the spatial angle range and achieving homogeneous light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a larger cooling body is used to ensure sufficient cooling of semiconductor light sources, then cooling effectiveness is improved, but the spatial angle range of light emission is restricted and external dimensions increase
Solution Approach 1:
The reflector is designed to serve dual functions: it reflects light to enlarge the spatial angle range of illumination while simultaneously acting as a cooling body with integrated cooling channels. This multi-functionality resolves the contradiction by eliminating the need for separate large cooling bodies that would restrict light emission angles.
Solution Approach 2:
The patent merges the reflector and cooling body into a single integrated component. The cooling channels are embedded within the reflector structure, allowing heat dissipation without compromising the optical performance and spatial angle range of light emission.
2Temperature
If a larger cooling body is used to ensure sufficient cooling of semiconductor light sources, then cooling effectiveness is improved, but external dimensions of the lamp increase
Solution Approach 1:
The reflector performs both optical reflection and thermal management functions, eliminating the need for additional volume dedicated solely to cooling. The integrated design maintains compact external dimensions suitable for retrofit lamp applications.
Solution Approach 2:
The cooling channels are nested within the reflector structure, utilizing the existing volume of the reflector for dual purposes. This nesting approach allows effective heat dissipation without increasing the overall external dimensions of the lamp.
3Illumination intensity
If the reflector is used to reflect light into shaded regions, then the spatial angle range of illumination is enlarged, but cooling effectiveness may be compromised
Solution Approach 1:
The reflector is designed to simultaneously achieve optical reflection for enlarged spatial angle range and thermal management through integrated cooling channels. The cooling channels are positioned to extract heat from LED modules without interfering with light reflection pathways.
Solution Approach 2:
The reflector structure incorporates localized cooling channels at specific positions to extract heat from LED modules. The cooling channels are strategically placed to provide adequate heat dissipation while maintaining the reflector's optical functionality for illuminating shaded 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
The design effectively enlarges the spatial angle range of illumination while ensuring efficient cooling of semiconductor light sources, allowing for broader and more uniform light emission without the need for larger cooling bodies, thus addressing the constraints of retrofit lamp designs.
Implementation Method 1
At least a part of a light that can be emitted by the first light source group can be reflected by means of the lower side of the reflector at least into a spatial region that cannot be directly illuminated by the first light source group
Implementation Method 2
the reflector is connected with good thermal conductivity in particular to the light source group or groups to be cooled thereby
Implementation Method 3
the upper rim of the reflector is designed as a cooling surface... amplified heat dissipation and therefore more effective cooling of the semiconductor light sources is achieved
Implementation Method 4
the upper rim of the reflector is designed as a cooling surface... amplified heat dissipation
Data Source
AI summary
A semiconductor lamp includes a reflector having a lower side and an upper side, wherein the lower side widens laterally and wherein the lower side and the upper side are separated from one another by an upper rim, and having a first light source group having at least one semiconductor light source and a second light source group having at least one semiconductor light source, wherein the reflector is provided as a cooling body for the first light source group and for the second light source group; wherein at least a part of a light that can be emitted by the first light source group can be reflected by means of the lower side of the reflector at least into a spatial angle range that cannot be directly illuminated by the first light source group.