Arc-Shaped Light Transmissive Portion for Lighting Devices
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Solution Overview
Problem
Existing lighting devices experience significant light intensity loss and inefficient light distribution due to high reflectance of light with large incident angles on the front cover, leading to uneven light distribution and reduced efficiency.
Innovation Solution
The lighting device features an arc-shaped light transmissive portion with incident angles limited to less than 45 degrees, utilizing lenses with asymmetric cross-sectional profiles and a reflector to minimize light reflectance and maximize transmittance, ensuring efficient light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a flat front cover is used, then the structure is simple, but light reflectance increases at large incident angles causing light distribution inefficiency
Solution Approach 1:
The patent applies curvature by designing the front cover as an arc-shaped light transmissive portion instead of a flat surface. This curvature transforms the incident angle characteristics, ensuring that light rays incident on the cover maintain smaller angles of incidence, thereby reducing reflectance and improving light transmission efficiency while maintaining structural simplicity
2Stability of the object's composition
If the front cover has high reflectance for large incident angles, then light distribution changes greatly, but this also reduces light distribution efficiency
Solution Approach 1:
The arc-shaped light transmissive portion with controlled incident angles less than 45 degrees reduces reflectance variations, stabilizing light distribution characteristics while improving overall efficiency
Solution Approach 2:
The patent changes the geometric parameter of the light transmissive portion from flat to arc-shaped, which fundamentally alters the incident angle distribution and reduces reflectance, thereby simultaneously improving light distribution stability and efficiency
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 design significantly reduces light distribution changes and enhances the overall light distribution efficiency of the lighting device by controlling incident angles and optimizing the light transmissive portion's shape and materials, such as glass or plastic.
Implementation Method 1
light emitted by the light emitting unit is emitted from the light transmissive portion after being distributed by the lens
Implementation Method 2
an incident angle corresponding to incident light at any point of the light transmissive portion is smaller than 45 °
Data Source
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AI summary
The present invention discloses a lighting device, including a light body, a light source module mounted in the light body, and a light transmissive portion covering the light source module. The light source module includes a plurality of lenses and a light emitting unit accommodated in the lens; light emitted by the light emitting unit is emitted from the light transmissive portion after being distributed by the lens; the light transmissive portion is arc-shaped; and an incident angle corresponding to incident light at any point of the light transmissive portion is smaller than 45°. In the lighting device according to the present invention, by designing the light transmissive portion to be arc-shaped, the incident angle corresponding to the incident light on the light transmissive portion is limited within 45°, which, thus, reduces reflectance of the light transmissive portion to the incident light so that a smaller light distribution change occurs during the light is emitted through the light transmissive portion, and improves light distribution efficiency of the lighting device.