Double-Sided LED Lighting Device with Dual PCBs and Lens Elements
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Solution Overview
Problem
Conventional LED lighting devices have limited viewing angles and inefficient heat dissipation, leading to suboptimal optic performance and reduced lifespan in shallow light boxes due to the encapsulated nature of LED tubes.
Innovation Solution
The design incorporates an elongated support member with dual printed circuit boards and lens elements that increase the viewing angle by surrounding LEDs with lenses, and a tubular cover for improved heat dissipation using materials with high thermal conductivity, such as aluminum or magnesium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If LED tubes are used as completely enclosing area, then lighting efficiency is improved, but heat dissipation becomes difficult
Solution Approach 1:
The support member is divided into multiple segments with heat dissipation fins that extend outward, creating multiple surfaces for heat release. This segmentation allows the enclosed LED tube structure to effectively dissipate heat through the fins while maintaining the compact design.
Solution Approach 2:
Heat dissipation is achieved by extending fins in the radial dimension outward from the support member, rather than relying solely on axial ventilation. This dimensional extension significantly increases the heat dissipation surface area within the confined enclosed space.
2Illumination intensity
If lens elements are added to increase viewing angle, then optic performance is improved, but device complexity increases
Solution Approach 1:
Multiple lens elements are integrated into a single modular assembly that attaches to the support member. This merging approach achieves the desired wide viewing angle through combined optical effects while maintaining manageable structural complexity through modular design.
Solution Approach 2:
The lens element assembly serves multiple functions: it expands the viewing angle, distributes light uniformly across the light box surface, and protects the LED components. This multi-functionality justifies the added complexity by delivering comprehensive optical performance improvement.
3Illumination intensity
If dual PCBs are mounted on opposite sides, then lighting uniformity is improved, but manufacturing complexity increases
Solution Approach 1:
The dual PCB configuration uses asymmetric positioning of electronic components on each PCB to optimize light distribution patterns. This asymmetric layout achieves superior lighting uniformity while the standardized PCB design keeps manufacturing complexity manageable through repetition of proven designs.
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 enhances the viewing angle to over 170 degrees, providing uniform lighting and extending the lifespan of LEDs and electrical components by effective heat management.
Implementation Method 1
each lens element includes at least one lens, the lens element mounted on the PCB at a location such that each lens substantially surrounds a respective one of the LEDs
Implementation Method 2
the tubular cover includes a translucent section for allowing light from the LEDs to escape
Implementation Method 3
improved heat dissipation using materials with high thermal conductivity, such as aluminum or magnesium
Data Source
AI summary
A lighting device includes an elongated support member, first and second printed circuit boards, at least one first LED, at least one second LED and at least one lens element. The elongated support member includes first and second sides, the first and second PCBs coupled to the first and second sides of the elongated support member, respectively, the at least one first LED mounted on the first PCB and the at least one second LED mounted on the second PCB, each lens element includes at least one lens, the lens element mounted on the PCB at a location such that each lens substantially surrounds a respective one of the LEDs.