Lighting Module With Wide-Angle Second Sources
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Solution Overview
Problem
Existing semiconductor lighting apparatuses face challenges in achieving uniform luminance distribution, particularly at night when fewer warm-white light sources are used, leading to uneven lighting and increased thickness due to diffusion covers, which hinders the compact design advantage of semiconductor light-emitting devices.
Innovation Solution
A lighting module with a higher number of first light sources and fewer second light sources, where the second light sources have a broader light distribution angle, reducing luminance unevenness and allowing for a thinner design by minimizing the number of second light sources needed, thus reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the quantity of second light sources is reduced to lower manufacturing cost, then manufacturing cost is reduced, but luminance distribution uniformity deteriorates
Solution Approach 1:
The patent changes the light distribution angle parameter of the second light source by selecting specific LED types with wider beam angles (e.g., 120 degrees or more). This parameter change allows fewer second light sources to cover the same area uniformly, reducing quantity while maintaining luminance distribution uniformity.
Solution Approach 2:
The patent creates an asymmetric configuration where the second light source has a significantly different (wider) light distribution angle compared to the first light source. This asymmetry in optical parameters compensates for the reduced quantity of second light sources, ensuring adequate coverage and uniformity.
2Manufacturing precision
If diffusion covers are added to improve luminance distribution uniformity, then luminance distribution uniformity is improved, but device thickness increases
Solution Approach 1:
The patent extracts the light distribution function from the separate diffusion cover component and integrates it directly into the second light source by selecting LEDs with inherently wide beam angles. This eliminates the need for additional diffusion covers, maintaining uniformity while reducing device thickness.
Solution Approach 2:
The second light source is designed to serve multiple functions: providing illumination and simultaneously achieving light diffusion through its wide beam angle. This multi-functionality eliminates the need for separate diffusion components, reducing overall device thickness.
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 achieves uniform luminance distribution and maintains a compact design by using fewer second light sources with broader light distribution angles, enhancing the appearance and cost-effectiveness of the lighting apparatus.
Implementation Method 1
A lighting module according to one embodiment includes: a mounting board; a plurality of first light sources arranged on the mounting board; and at least one second light source arranged on the mounting board
Data Source
AI summary
A lighting module includes a mounting board; a plurality of first light sources located on the mounting board; and one or more second light sources located on the mounting board. A wavelength range and/or a correlated color temperature of the plurality of first light sources is different from a wavelength range and/or a correlated color temperature of the one or more second light sources. A quantity of the first light sources is greater than a quantity of the one or more second light sources. A light distribution angle of each of the one or more second light sources is greater than a light distribution angle of each of the plurality of first light sources.