LED Lighting Cover with Reflective Surfaces for Shadow Elimination
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Solution Overview
Problem
Conventional lighting apparatuses using LEDs often suffer from light uniformity issues due to protruding components blocking light and creating band-shaped shadows, which affect brightness and quality.
Innovation Solution
The design incorporates a cover with a first reflecting surface convex upward and a second reflecting surface convex downward, along with a light emitting module and optical member arrangement that ensures light is uniformly distributed across the emission area, using a combination of materials like polycarbonate and reflective layers to enhance light reflectance and reduce shadows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a protruding portion of the body overlaps the optical member to fix the edge, then the optical member is securely fixed, but a portion of light is blocked and band-shaped shadows are generated
Solution Approach 1:
The protruding portion that causes shadowing is extracted or removed from the optical path area. The body is designed without protrusions that overlap the optical member, eliminating the source of band-shaped shadows while maintaining fixing functionality through alternative means such as side clamping or adhesive fixation.
Solution Approach 2:
A reflective member is introduced as an intermediary element between the light source and the optical member. This reflective member redirects light around the fixing structure, ensuring uniform illumination across the optical member surface while the body maintains its fixing function through a different structural arrangement.
2Ease of manufacture
If conventional fixing structures are used with protruding portions, then assembly is simple, but light uniformity deteriorates due to shadow formation
Solution Approach 1:
The lighting apparatus is segmented into distinct functional modules: the body for fixing, the reflective member for light redirection, and the optical member for light emission. This segmentation allows each component to perform its function without interfering with others, achieving both easy assembly and uniform light distribution.
Solution Approach 2:
The reflective member serves as a mediator that resolves the conflict between simple fixing structures and uniform light distribution. It redirects light paths to compensate for the absence of protruding fixing portions, maintaining light uniformity while allowing for simpler, non-intrusive fixing mechanisms.
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 improves light uniformity and reduces glare, maintaining high brightness consistency across the lighting area while preventing shadows, thus enhancing the overall quality and reliability of the lighting apparatus.
Implementation Method 1
a first reflecting surface convex upward and a second reflecting surface convex downward
Data Source
AI summary
A lighting apparatus includes a first body including a first inner circumferential surface and a first outer circumferential surface, a cover disposed on and fastened to the first body and including an open bottom surface, an optical member disposed between the first body and the cover and exposed at the open bottom surface of the cover, and a light source member including a circuit board disposed between the cover and the optical member along an edge of the cover and at least two light sources mounted on the circuit board to face each other.