LED Lighting Apparatus Scattering Optical Element Wide Distribution
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Solution Overview
Problem
LED lighting apparatuses struggle to achieve wide light distribution similar to incandescent bulbs, particularly in retrofitting applications where a 270° light distribution angle is required, as they often emit light in a narrow, directional manner without adequate diffusion.
Innovation Solution
Incorporating a scattering portion within a transparent optical element inside a rotation-symmetrical globe, which diffuses and reflects light to achieve wide distribution, utilizing a combination of materials like acryl and metal diffusion portions to manage heat and light reflection efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If LED lighting apparatus uses a narrow directional light emission structure, then the device complexity is reduced, but the light distribution angle is insufficient to achieve wide distribution (270°) like incandescent bulbs
Solution Approach 1:
The patent introduces an optical element as an intermediary component between the LED light source and the surrounding environment. This optical element includes a scattering portion that diffuses the narrow directional light from the LED, converting it into wide-angle light distribution comparable to incandescent bulbs, while maintaining the simplicity of the LED source itself
Solution Approach 2:
The patent changes the optical parameters of the light emission system by incorporating a scattering portion with specific scattering properties. This scattering portion modifies the light distribution angle parameter from a narrow directional pattern to a wide distribution pattern (270°), achieving the desired illumination characteristic without complicating the basic LED structure
2Illumination intensity
If LED lighting apparatus incorporates scattering portions and optical elements to achieve wide light distribution, then the light distribution angle is improved, but the device complexity increases
Solution Approach 1:
The optical element serves multiple functions simultaneously: it diffuses light to achieve wide distribution, reflects light to improve efficiency, and converts Fresnel reflection components into useful wide light distribution. By combining these functions in a single component, the patent avoids the need for multiple separate elements, thereby limiting the increase in device complexity
Solution Approach 2:
The patent merges the scattering function, reflection function, and light distribution function into a single integrated optical element. This consolidation approach achieves wide light distribution while minimizing the number of separate components, thus controlling the increase in device complexity
3Temperature
If LED lighting apparatus uses metal diffusion portions for heat management and light reflection, then the heat dissipation efficiency is improved, but the absorption loss may increase
Solution Approach 1:
The patent applies different surface qualities to different regions of the optical element. The light-incident surface has high reflectivity to minimize absorption loss, while other portions have scattering properties optimized for diffusion. This local differentiation allows the metal diffusion portion to efficiently manage heat through controlled reflection and scattering, reducing overall energy absorption loss
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 LED lighting to produce wide light distribution, enhancing luminaire efficiency and achieving a retrofitting property by converting Fresnel reflection components into wide light distribution components, while minimizing absorption loss and ensuring uniform lighting.
Implementation Method 1
an optical element including a scattering portion inside and transparent to visible light
Implementation Method 2
converting Fresnel reflection components into wide light distribution components
Data Source
AI summary
A lighting apparatus according to an embodiment includes a globe, an optical element including a scattering portion inside and transparent to visible light, and a light source disposed to be opposed to a light incident surface of the optical element. The scattering portion is disposed inside the globe.