LED Lamp Light Guide and Heat Dissipation for Uniform Illumination
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Solution Overview
Problem
Conventional LED lamps for fluorescent lighting fixtures require a large number of LEDs or high power consumption to achieve sufficient light emission, leading to non-uniform brightness and increased heat generation, which can result in wiring pattern deterioration and increased manufacturing costs.
Innovation Solution
The LED lamp design incorporates a light guide with a semicircular cross-section to efficiently diffuse light, a heat dissipation member to manage heat, and a power supply configuration where power supply parts are mounted on opposite surfaces of a separate substrate, reducing the number of LEDs needed and power consumption while maintaining effective illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a large number of LEDs are used or high current is supplied to achieve sufficient light emission, then illumination intensity is improved, but power consumption increases and heat generation increases
Solution Approach 1:
A light guide is introduced as an intermediary component between the LEDs and the external environment. The light guide has a semicircular cross-section design that efficiently collects and diffuses light from the LEDs in multiple directions, increasing light extraction efficiency and reducing the need for high power consumption to achieve sufficient illumination.
Solution Approach 2:
The patent changes the geometric parameters of the LED structure by using a semicircular cross-section for the light guide instead of conventional flat or cylindrical designs. This parameter change optimizes light distribution and extraction efficiency, allowing sufficient illumination with reduced LED count and power consumption.
2Illumination intensity
If a large number of LEDs are used or high current is supplied to achieve sufficient light emission, then illumination intensity is improved, but heat generation increases causing wiring pattern deterioration
Solution Approach 1:
The light guide acts as a thermal intermediary that not only optimizes light extraction but also helps in heat management by providing additional surface area for heat dissipation and improving the thermal pathway from the LEDs.
Solution Approach 2:
The patent converts the harmful effect of heat generation into a beneficial outcome by designing the semicircular light guide structure that improves both light extraction and heat dissipation simultaneously, turning the thermal challenge into an opportunity for enhanced overall performance.
3Stability of the object's composition
If LEDs are arranged at equal intervals to achieve uniform illumination, then illumination uniformity is improved, but the number of LEDs must be increased to cover the entire tube length
Solution Approach 1:
The light guide serves as a mediator that redistributes light more evenly along the tube length. By optimizing the semicircular geometry and light extraction characteristics, the light guide ensures uniform illumination with fewer LEDs spaced at wider intervals.
Solution Approach 2:
Instead of placing LEDs at every possible position to ensure uniform coverage, the patent uses a partial action approach where fewer LEDs are strategically positioned, and the light guide compensates by diffusing and redistributing the light to achieve uniform illumination across the entire length.
4Reliability
If power supply parts are placed at the ends of the substrate to avoid overlapping LEDs, then heat interference is reduced, but the light-emitting area is decreased
Solution Approach 1:
The patent resolves the spatial conflict by transitioning to a three-dimensional arrangement where the substrate is positioned at a deviation in the radial direction from the center axis of the tube. This dimensional change allows power supply parts to be located at the ends without overlapping the LED region, maintaining both heat management and light-emitting area.
Solution Approach 2:
The asymmetric positioning of the substrate relative to the tube center axis enables optimal separation between power supply components and LED light-emitting regions. This asymmetric layout allows power parts to be placed at the ends while maximizing the light-emitting surface area in the central region.
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 allows for reduced LED count and power consumption, enhancing illumination uniformity, reducing heat-related issues, and lowering manufacturing costs by efficiently guiding light and dissipating heat, thus improving the overall performance and reliability of the LED lamp.
Implementation Method 1
A light guide covering the LED light sources is provided on the substrate. The light guide is held in close contact with each of the LED light sources.
Implementation Method 2
a heat dissipation member to manage heat
Data Source
AI summary
An LED lamp A1 includes a plurality of LED modules 1 and a substrate 2 on which the LED modules 1 are mounted in a row. A light guide 3 covering the LED modules 1 is provided on the substrate 2. The light guide 3 is held in close contact with each of the LED modules. With this arrangement, a proper amount of light is obtained with the use of a smaller number of LED modules 1 or with less power consumption.