LED Tube Lamp Uniform Illumination and Thermal Management
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Solution Overview
Problem
Existing LED tube lamps face issues with non-uniform illumination and electrical component malfunction due to high temperatures, leading to grainy visual appearances and reduced viewing angles, which affect visual comfort and aesthetics.
Innovation Solution
The proposed LED tube lamp design includes a diffusive layer on the lamp tube, a light strip with a printed circuit board, a rectifying circuit, and a filtering circuit, along with end caps that use a thermal conductive member and hot melt adhesive for secure bonding, ensuring uniform illumination and improved thermal management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LED chips are spatially arranged on the circuit board inside the lamp tube, then the light sources are provided, but the illumination becomes non-uniform and grainy visual appearance occurs
Solution Approach 1:
A diffuser plate is introduced as an intermediary component between the LED chips on the circuit board and the lamp tube interior. The diffuser plate receives light from the spatially arranged LED chips and redistributes it uniformly throughout the lamp tube, eliminating the grainy visual appearance while maintaining the simplicity of the LED array configuration.
2Reliability
If end caps are provided at two ends of the lamp tube with power supply, then electricity is transmitted to light sources, but temperature inside the LED tube lamp increases causing electrical component malfunction
Solution Approach 1:
The end caps are designed with thermal dissipation features that convert the harmful heat generated by electrical components into beneficial thermal management. The end caps conduct heat away from sensitive electrical components and dissipate it through the lamp tube structure, preventing overheating and component malfunction while maintaining reliable operation.
3Illumination intensity
If diffusive layer is added on the lamp tube, then uniform illumination is achieved, but the device complexity increases
Solution Approach 1:
The diffuser plate serves multiple functions simultaneously: it diffuses light uniformly, provides structural support for the circuit board, and acts as a thermal management interface. By combining these functions into a single component, the design achieves uniform illumination without significantly increasing overall device complexity.
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 provides a uniform and comfortable illumination with enhanced thermal management, preventing electrical component malfunctions and improving the overall aesthetic and functional performance of the LED tube lamp.
Implementation Method 1
end caps that use a thermal conductive member and hot melt adhesive for secure bonding, ensuring uniform illumination and improved thermal management
Implementation Method 2
end caps that use a thermal conductive member and hot melt adhesive for secure bonding
Data Source
AI summary
An LED tube lamp comprises a lamp tube, a diffusive layer covered on a surface of the lamp tube, two end caps, a light strip, LED light sources on the light strip, and a power supply. Each of the two end caps is coupled to a respective end of the lamp tube. The light strip is attached to an inner circumferential surface of the lamp tube. The power supply module comprises a printed circuit board electrically connected to the light strip, a rectifying circuit and a filtering circuit coupled to the rectifying circuit. An end of the light strip is detached from the inner circumferential surface of the lamp tube and electrically connected to the printed circuit board.