LED Module Pressure Equalization and Heat Sink Coating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
LED lighting devices experience increased internal pressure due to heat generation, leading to reduced airtightness and mechanical coupling force, as the gasket's restoring force decreases over time, causing it to lose its original state and fail to maintain proper airtightness.
Innovation Solution
A light-emitting diode (LED) module with a heat sink and insulating heat radiation coating layer, where an air flow space between the light source unit and protective cover communicates with the outside through air vents, balancing internal pressure with external pressure, and the insulating heat radiation coating layer improves heat radiation performance while reducing weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gasket is used to increase airtightness at mechanically coupled portions, then airtightness is improved, but the gasket's restoring force decreases over time due to repetitive stress from internal pressure changes, causing it to fail in maintaining proper airtightness
Solution Approach 1:
The patent extracts the harmful internal pressure from the sealed cavity by providing pressure equalization holes that allow the internal pressure to equalize with the external atmosphere. This eliminates the repetitive stress on the gasket, preventing its restoring force from decreasing over time and maintaining both airtightness and gasket service life.
2Stability of the object's composition
If the internal pressure is allowed to increase due to heat generation, then the sealed structure maintains its integrity, but the increased pressure acts as an external force that presses weak coupling portions, reducing mechanical strength
Solution Approach 1:
The patent removes the harmful effect of internal pressure buildup by providing pressure equalization holes. These holes allow the heated air inside the sealed cavity to escape or equalize with the external pressure, eliminating the external force that presses on weak coupling portions and maintaining mechanical coupling strength.
3Reliability
If an insulating heat radiation coating layer is applied on the heat sink, then heat radiation performance is improved and electrical insulation is enhanced, but the overall weight of the LED module increases
Solution Approach 1:
The patent applies an insulating heat radiation coating layer on the heat sink surface. This coating layer is a composite material that combines heat radiation properties with electrical insulation properties, allowing the heat sink to efficiently radiate heat while preventing electrical short circuits between the heat sink and other components.
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 maintains airtightness and mechanical coupling force, enhancing durability and product reliability, while improving heat radiation performance and extending the lifespan of the LED module by preventing heat-induced pressure increases and reducing the likelihood of electrical short circuits.
Implementation Method 1
air heated by heat generated from the LED may flow along the air flow space
Implementation Method 2
a heat sink which includes a base substrate configured to support the light source unit and radiate heat generated from the light source unit
Implementation Method 3
an insulating heat radiation coating layer applied on an outer surface of the base substrate
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
An LED module is provided. An LED module according to an exemplary embodiment of the present invention comprises: a light source unit including at least one LED mounted on one surface of a circuit board; a heat sink including a base substrate which supports the light source unit and discharges heat generated in the light source unit and an insulating heat dissipating coating layer applied to an outer surface of the base substrate; a protective cover which includes convex portions formed in regions corresponding to the LED and is coupled to one surface of the heat sink to protect the light source unit from the external environment; an air flow space formed between the light source unit and the protective cover so as to provide a space through which air can flow; and at least one air vent unit for maintaining a state of equilibrium between an internal pressure in the air flow space and the outside air pressure by acting as a passage through which the air can move from the air flow space to the outside.