Dual Diffuser Lighting Device for Shadow Elimination
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Solution Overview
Problem
Existing LED lighting systems face challenges in consistent light blending and shadowing issues due to the physical structure of the lamp, which affects the uniformity of light output and color mixing.
Innovation Solution
A lighting device incorporating both an inner and an outer diffuser to spread and blend light, with the outer diffuser surrounding the inner diffuser, creating a space between them to eliminate shadows and enhance color mixing, and using a snap-fit engagement to secure the diffusers without fasteners or adhesives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a solid object is placed within the lighting cavity to block light that does not mix properly, then light blending consistency is improved, but shadowing issues are introduced on the diffuser
Solution Approach 1:
The diffuser is divided into two separate components: an inner diffuser and an outer diffuser. The inner diffuser is positioned close to the LED chips to ensure proper light mixing, while the outer diffuser is positioned away from the LED chips to avoid shadowing. This segmentation allows each diffuser to perform its specific function without interfering with the other, resolving the contradiction between achieving consistent light blending and avoiding shadowing on the diffuser.
2Manufacturing precision
If LED chips are positioned closer together to combine light appearance, then light mixing is improved, but device complexity increases due to structural modifications
Solution Approach 1:
Instead of modifying the LED chip positions or adding complex structural elements to achieve light mixing, the patent segments the diffuser into two separate components. The inner diffuser handles the light mixing function by being positioned close to the LED chips, while the outer diffuser provides the final light distribution. This approach achieves uniform light mixing without requiring complex structural modifications to the LED arrangement or housing.
3Reliability
If the driver circuit board protrudes into the lighting cavity, then electrical connectivity is improved, but shadowing on the diffuser is introduced
Solution Approach 1:
The diffuser system is segmented into an inner diffuser and an outer diffuser positioned at different distances from the LED chips. The inner diffuser is placed close to the LED chips where the driver circuit board protrudes, allowing the board to be positioned for electrical connectivity without casting shadows on the diffuser surface. The outer diffuser is positioned further away, serving as the final light distribution element. This spatial segmentation resolves the shadowing issue while maintaining electrical connectivity.
Solution Approach 2:
The inner diffuser acts as an intermediary element between the LED chips and the outer diffuser. It is positioned close to the LED chips to mix the light properly, while the outer diffuser serves as the final light distribution element. This intermediary structure allows the driver circuit board to protrude into the lighting cavity for electrical connectivity without casting shadows on the diffuser, as the inner diffuser intercepts and mixes the light before it reaches the outer diffuser.
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 dual diffuser system improves light uniformity and color mixing, eliminating shadows from internal objects and providing a more consistent light output, while allowing for a more flexible design that accommodates protruding components within the lighting cavity.
Implementation Method 1
The inner diffuser and the outer diffuser spread and blend the light emitted by the at least one lighting element
Implementation Method 2
The inner diffuser and the outer diffuser spread and blend the light emitted by the at least one lighting element
Data Source
AI summary
A lighting device is disclosed, and includes at least one lighting element for emitting light, an inner diffuser, and an outer diffuser. The inner diffuser defines a lighting cavity and an outer surface, where the at least one lighting element is located within the lighting cavity. The outer diffuser surrounds the inner diffuser. The outer diffuser defines an inner surface. The outer surface of the inner diffuser and the inner surface of the outer diffuser cooperate together to define a space between the inner diffuser and the outer diffuser. The inner diffuser and the outer diffuser spread and blend the light emitted by the at least one lighting element.