LED Lighting Homogenization via Flat PCB and Reflector
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Solution Overview
Problem
Conventional LED lighting systems struggle to achieve homogeneous light distribution due to directional light emission, requiring complex and cost-intensive three-dimensional carriers to mimic omnidirectional light distribution.
Innovation Solution
A lighting system comprising a flat circuit board with LEDs mounted on opposite sides and a separate reflector, where at least 20% of the emitted light is reflected to homogenize the light distribution, with the reflector being designed to redirect light to underprovided directions, thereby simplifying the design and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LEDs are arranged on a three-dimensional carrier with LEDs on multiple side surfaces to achieve omnidirectional light distribution, then homogeneous light distribution is improved, but device complexity and manufacturing cost worsen
Solution Approach 1:
A reflector is introduced as an intermediary component to redirect light from LEDs on a flat circuit board. The reflector mediates between the directional LED emission and the desired omnidirectional light distribution, achieving homogeneous illumination without requiring a complex three-dimensional carrier structure with LEDs on multiple surfaces.
Solution Approach 2:
The solution transitions from a three-dimensional arrangement of LEDs on multiple carrier surfaces to a two-dimensional flat circuit board configuration. By adding the reflector component, the system achieves omnidirectional light distribution in the third dimension through light redirection rather than through three-dimensional LED placement.
2Illumination intensity
If LEDs are arranged on a three-dimensional carrier to provide light in all directions, then light distribution uniformity is improved, but manufacturing cost worsens
Solution Approach 1:
The lighting system is segmented into distinct functional components: a flat circuit board carrying LEDs, a separate reflector component, and a housing. This segmentation allows each component to be manufactured independently using simpler, more cost-effective processes compared to manufacturing a complex integrated three-dimensional carrier with multiple LED mounting surfaces.
Solution Approach 2:
The reflector serves as an intermediary that achieves the expensive goal of omnidirectional light distribution through a simpler mechanism. Instead of manufacturing expensive multi-surface carriers, the reflector mediates to achieve the same optical effect with cheaper, simpler LED mounting on a flat board.
3Illumination intensity
If multiple LEDs are mounted on different surfaces of a three-dimensional carrier to achieve omnidirectional emission, then light distribution homogeneity is improved, but the number of components and assembly complexity worsen
Solution Approach 1:
Multiple LEDs that would traditionally be distributed across five separate carrier surfaces are merged onto a single flat circuit board. The reflector is then combined with this simplified LED array to achieve the omnidirectional effect, reducing the number of mounting surfaces and simplifying assembly compared to the three-dimensional carrier approach.
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 system achieves a more uniform light distribution with reduced complexity and cost by using a flat circuit board and a reflector to redistribute light, providing adequate illumination in all directions without the need for multiple LEDs on a three-dimensional carrier.
Implementation Method 1
at least 20% of the emitted light is incident on the reflector and is reflected thereby in order to homogenize the light distribution generated by the lighting means
Data Source
AI summary
The present invention relates to a lighting means comprising at least two LEDs mounted on opposite sides of a flat printed circuit board, said printed circuit board being combined with a reflector which is free of LEDs, a part of the light emitted by each LED being reflected by the reflector to homogenize the light distribution generated by the lighting means, and specifically in each case with a directional component parallel to a surface direction of the flat printed circuit board.