LED Packaging Density Gradient for Thermal Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing light-emitting apparatuses face challenges in achieving high light-emission intensity while minimizing heat generation, as increasing packaging density to enhance intensity leads to reduced light emission due to elevated temperatures, and widening spacing to manage heat results in reduced light output.
Innovation Solution
A light-emitting apparatus with a packaging substrate featuring densely packed LED elements at the center and less densely packed elements around the perimeter, utilizing a metal substrate for heat dissipation, and an optical element to collect light, with specific packaging intervals to balance intensity and heat management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the packaging interval of the light-emitting element is narrowed to increase the packaging density, then the light emission intensity is improved, but the temperature of the light-emitting element rises and the light emission intensity is reduced
Solution Approach 1:
The patent applies local quality by differentiating the packaging density in different regions of the substrate. The center region has a first packaging density while the peripheral region has a second packaging density, allowing each region to be optimized for its specific thermal and optical characteristics. This resolves the contradiction by enabling high density where it benefits light intensity while maintaining lower density where heat accumulation occurs
2Temperature
If the packaging interval of the light-emitting element is widened to suppress the increase in the amount of generated heat, then the temperature is reduced, but the number of light-emitting elements arranged in positions close to the optical axis of the lens decreases and the light emission intensity is reduced
Solution Approach 1:
The patent implements local quality by creating region-specific packaging densities. The center region maintains higher packaging density to ensure sufficient light-emitting elements are positioned near the optical axis for high light emission intensity, while the peripheral region uses lower packaging density to reduce overall heat generation and improve thermal management
3Illumination intensity
If the packaging density of the light-emitting element is increased to increase the light emission intensity, then the light emission intensity is improved, but the temperature of the light-emitting element rises by increasing the amount of generated heat
Solution Approach 1:
The patent applies local quality by differentiating packaging density between center and peripheral regions. The center region has higher packaging density to maximize light emission intensity, while the peripheral region has lower packaging density to reduce overall heat generation, thus resolving the contradiction between light intensity and heat management
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 high light-emission intensity while effectively suppressing heat generation by optimizing packaging density and using a metal substrate for thermal management, maintaining uniform temperature and enhancing light collection.
Implementation Method 1
sealing an LED element that emits blue light with a resin containing phosphors and mixing light obtained by exciting the phosphors by the light from the LED element
Implementation Method 2
packaging substrate having a packaging area... preferably that the packaging substrate is a metal substrate
Data Source
AI summary
A light-emitting apparatus according to the present invention has a packaging substrate having a packaging area, a plurality of light-emitting elements packaged in the packaging area, and a sealing resin that seals the plurality of light-emitting elements. The plurality of light-emitting elements includes light-emitting elements packaged in a first packaging area including the center of the packaging area and light-emitting elements packaged in a second packaging area surrounding the perimeter of the first packaging area. The packaging density of the light-emitting elements packaged in the first packaging area is higher than the packaging density of the light-emitting elements packaged in the second packaging area.