Ventilated LED Circuit Board for High-Intensity Therapy Light Cooling
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Solution Overview
Problem
Existing therapy lights struggle to produce intense light output for penetrating live tissue while maintaining a safe temperature and are not adequately ventilated, leading to potential discomfort or injury, and are often costly and cumbersome to manufacture.
Innovation Solution
A ventilated LED circuit board design with a housing featuring intake and exhaust ventilation openings, airflow apertures, and an airflow generating apparatus that cools the LEDs, ensuring a ratio of aperture to LED cross-sectional area greater than 3:2, allowing for intense light output up to 80 mW/cm² without excessive heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If intense light output is produced to penetrate live tissue for healing, then the light intensity is sufficient for therapeutic effect, but the temperature becomes excessively high causing discomfort or injury
Solution Approach 1:
The patent converts the harmful heat generated by intense LED light output into a beneficial cooling mechanism by designing airflow apertures that channel air directly over the LED circuit board and through heat-dissipating fins, transforming the thermal problem into an active cooling feature
Solution Approach 2:
The patent employs pneumatic cooling by introducing air flow through intake openings, across the LED circuit board and heat-dissipating fins, and out through exhaust openings, using fluid dynamics to remove heat and enable sustained intense light output without excessive temperature rise
2Temperature
If adequate ventilation is provided to cool the LEDs, then temperature is controlled, but the device complexity increases
Solution Approach 1:
The patent merges the ventilation openings with the housing structure itself, integrating the cooling function into the existing device framework rather than adding separate cooling components, thereby controlling temperature while minimizing increases in device complexity
Solution Approach 2:
The housing structure serves multiple functions: it provides structural support, contains the LED circuit board, and simultaneously acts as the ventilation system with integrated intake and exhaust openings, eliminating the need for separate cooling system 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 design achieves intense light penetration for healing while keeping temperatures safe, is lightweight, inexpensive, and easy to use, with effective ventilation and cooling, enhancing safety and manufacturability.
Implementation Method 1
An airflow generating apparatus causes air to flow into and through the intake ventilation opening, from the intake ventilation opening to one of the front face and the back face of the circuit board, through the plurality of airflow apertures to the other one of the front face and the back face of the circuit board, and out of the exhaust ventilation opening, to thereby cool the light emitting diodes
Data Source
AI summary
A therapy light comprises a housing and a circuit board mounted within the housing and having light emitting diodes mounted thereon. Airflow apertures in the circuit board are disposed adjacent the light emitting diodes such that the front face and the back face of the circuit board are in airflow communication one with the other. The ratio of the cumulative cross-sectional area of the airflow apertures to the cumulative cross-sectional area of the light emitting diodes is greater than about 3:2. In use, a fan causes air to flow into an intake ventilation opening, from the intake ventilation opening to the circuit board, through the airflow apertures in the circuit board, and out of an exhaust ventilation opening, to thereby cool the light emitting diodes.