LED Lighting Apparatus with Heat Dissipator Windows
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Solution Overview
Problem
Conventional reflector LED lighting apparatuses lack the ability to utilize leaked light for enhanced brightness and have high manufacturing costs due to the need for specialized metal reflectors for various light distribution patterns, which are not suitable substitutes for halogen lamps.
Innovation Solution
A lighting apparatus with a heat dissipator having windows for leaking light and a bowl-shaped reflector made of resin or glass, allowing for controlled light distribution and reduced manufacturing costs by separating the heat dissipator and reflector components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a metal reflector is used in LED lighting apparatus, then heat dissipation characteristics are improved, but the ability to utilize leaked light for enhanced brightness is lost
Solution Approach 1:
The reflector is divided into multiple regions with different functions: a first region with high reflectivity for directing light, and a second region with lower reflectivity that allows leaked light to escape. This segmentation enables both heat dissipation and leaked light utilization simultaneously.
Solution Approach 2:
Different regions of the reflector are assigned different optical properties. The first region has high reflectivity to maintain directional lighting and heat dissipation, while the second region has controlled reflectivity to allow leaked light to contribute to overall brightness, creating local quality variations to satisfy multiple requirements.
2Adaptability or versatility
If facets are formed on a metal reflector to control light distribution, then light distribution control is achieved, but manufacturing cost is significantly increased
Solution Approach 1:
Instead of changing the physical shape of the reflector through facets, the invention changes the optical parameter (reflectivity) by applying selective reflective films to different regions. This allows light distribution control through material property variation rather than geometric modification, reducing manufacturing complexity.
Solution Approach 2:
The invention replicates the light distribution control function of facets using a different approach: instead of geometric facets, reflective films with varying reflectivity are applied to create equivalent optical effects, providing a cost-effective alternative that achieves the same functional outcome.
3Adaptability or versatility
If different metal reflectors are prepared for each light distribution pattern, then various light distribution patterns are achieved, but manufacturing cost increases even more
Solution Approach 1:
A single reflector structure serves multiple functions by incorporating different reflective film regions. The same reflector can provide various light distribution patterns by strategically placing reflective films with different reflectivity values in specific zones, eliminating the need for multiple specialized reflectors.
Solution Approach 2:
The reflector's optical characteristics become adjustable and adaptable through the selective application of reflective films. By changing which regions receive reflective coating and at what reflectivity levels, the same physical reflector can dynamically adapt to provide different light distribution patterns as needed.
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 the use of leaked light for enhanced brightness and reduces manufacturing costs by allowing the heat dissipator to be commonly used with different reflectors for various light distribution patterns, maintaining high heat dissipation characteristics.
Implementation Method 1
a heat dissipator that is in one of a bottomed cylindrical shape and a bowl shape, and that has a bottom portion, a circumferential wall portion, and an opening
Implementation Method 2
a reflector that is bowl-shaped and provided in the heat dissipator, and is operable to reflect the emitted light toward the opening
Data Source
AI summary
Provided is a lighting apparatus that is suitable as a substitute for a conventional halogen lamp when positively utilizing leaked light. The lighting apparatus comprises: a heat dissipator 12 that is in one of a bottomed cylindrical shape and a bowl shape, and that has a bottom portion, a circumferential wall portion, and an opening; and a light-emitting device 18b that is provided inside the heat dissipator 12 at the bottom portion and is operable to emit light, wherein the heat dissipator 12 has one or more windows 19 for leaking the emitted light outside the heat dissipater 12.