Lighting Device Reflectors for Uniform Brightness
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Solution Overview
Problem
Conventional lighting devices face challenges in achieving uniform brightness across illuminated surfaces, particularly due to variations in light distribution angles and distances from the light source, which affect brightness consistency.
Innovation Solution
The lighting device incorporates a first and second reflecting part with distinct light distribution angles and distances from the light source, where the first reflecting part has a larger light distribution angle and is positioned farther from the light source than the second reflecting part, allowing for improved brightness uniformity by adjusting the light distribution angles and distances to ensure consistent illumination across the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single reflecting part is used in conventional lighting devices, then the structure is simple, but the brightness uniformity across the illuminated surface deteriorates
Solution Approach 1:
The lighting device divides the single reflecting part into multiple reflecting parts (first reflecting part and second reflecting part), each with different light distribution angles. This segmentation allows different regions of the illuminated surface to receive optimized light distribution, improving brightness uniformity while maintaining reasonable structural complexity
Solution Approach 2:
Each reflecting part is assigned a specific light distribution angle tailored to its function: the first reflecting part has a first light distribution angle for illuminating a first region, while the second reflecting part has a second light distribution angle for illuminating a second region. This local optimization ensures that each region receives appropriate light distribution for uniform brightness
2Area of stationary object
If the light distribution angle is increased to illuminate a wider area, then the coverage area is improved, but the brightness uniformity deteriorates due to varying distances from the light source
Solution Approach 1:
The patent applies different light distribution angles to different reflecting parts based on their specific functions and positions. The first reflecting part uses a first light distribution angle optimized for its target region, while the second reflecting part uses a second light distribution angle for its region, ensuring uniform brightness across the entire illuminated area without sacrificing coverage
Solution Approach 2:
The patent changes the light distribution angle parameter for different reflecting parts. By adjusting the light distribution angle according to the distance from the light source and the target illumination area, the system achieves both wide coverage and uniform brightness distribution across the illuminated surface
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 configuration enhances brightness uniformity across the illuminated surface by ensuring that the light distribution is more even, addressing the issue of non-uniformity caused by varying distances and angles, thereby providing a more consistent illumination experience.
Implementation Method 1
The first optical part includes a first reflecting part and a second reflecting part... a first-reflecting-part light, that is a portion of a first outgoing light from the first light source part reflected by the first reflecting part, and a second-reflecting-part light, that is a portion of the first outgoing light reflected by the second reflecting part
Data Source
AI summary
A lighting device includes a first light emitting part including a first light source part and a first optical part that includes a first reflecting part and a second reflecting part. A first direction from the first reflecting part to the second reflecting part crosses a second direction from the first light source part to the second reflecting part. A direction from the first light source part to the first reflecting part is along a first plane which includes the first direction and the second direction, and crosses the second direction. A distance between the first reflecting part and the first light source part is larger than a distance between the second reflecting part and the first light source part. A light distribution angle of a first-reflecting-part light in the first plane is larger than the light distribution angle of the second-reflecting-part light in the first plane.