Automated Heat Control for Portable LED Lighting
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Solution Overview
Problem
Existing portable lighting devices, such as flashlights and headlamps, do not effectively monitor or automatically control heat generation, leading to potential damage from excessive temperature, despite the use of heat sink designs.
Innovation Solution
Incorporating an automated heat control and monitoring assembly within the device, which includes a housing with a light source, current source, heat control circuit, temperature sensor, and processor to adjust current supply based on temperature thresholds, thereby managing light intensity and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light source operates at high current to increase light intensity, then the illumination performance is improved, but the heat generation increases causing temperature to exceed safe thresholds
Solution Approach 1:
The patent implements a feedback control mechanism where the temperature sensor continuously monitors the heat sink temperature, and the processor adjusts the current supply to the light source based on real-time temperature readings. When temperature approaches the threshold, the system automatically reduces current to lower heat generation, creating a closed-loop control system that balances illumination intensity and thermal management.
Solution Approach 2:
The patent employs dynamic current adjustment rather than static operation. The current supply to the light source is continuously varied based on temperature conditions, allowing the system to optimize performance at different operating states. This dynamic control enables high illumination output when temperature is low and automatic reduction when thermal limits are approached.
2Temperature
If a heat sink design is used to dissipate heat, then the heat dissipation capability is improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple functions into the heat sink assembly: it serves as both a thermal management component and a mounting structure for the temperature sensor and light source. The heat sink is integrated directly into the device housing, combining structural support with thermal dissipation functionality to reduce overall device complexity.
Solution Approach 2:
The heat sink assembly is designed to passively dissipate heat through its extended surface area without requiring active cooling mechanisms. The thermal management function is self-contained within the heat sink structure itself, eliminating the need for separate fans or pumps and reducing device complexity.
3Reliability
If the temperature sensor and processor are added to create automated heat control, then the heat management capability is improved, but the device complexity increases
Solution Approach 1:
The processor in the patent serves multiple functions: it controls the light source operation, processes temperature sensor data, manages current supply, and implements the heat control logic. This multi-functional approach reduces the need for separate dedicated components, thereby limiting the increase in device complexity while maintaining reliable heat management.
Solution Approach 2:
The processor acts as an intermediary between the temperature sensor and the light source control circuitry. It receives temperature data, processes the information against predefined thresholds, and automatically adjusts current supply accordingly. This intermediary role enables intelligent heat management without requiring direct complex interaction between all components.
4Temperature
If the current supply is reduced to lower heat generation, then the temperature is controlled within safe thresholds, but the light intensity decreases
Solution Approach 1:
The system implements periodic monitoring and adjustment cycles where the temperature sensor continuously reads temperature data, the processor compares it against thresholds, and the current supply is periodically adjusted. This periodic control allows the light source to operate at high intensity during acceptable temperature ranges and automatically reduces intensity only when thermal limits are approached, maintaining optimal illumination for as long as possible.
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 solution enables efficient heat management, reducing the risk of damage from excessive heat and improving the performance and safety of portable lighting devices by automatically adjusting current supply and light intensity based on temperature readings.
Implementation Method 1
The temperature sensor may be disposed in the cavity of the housing and adapted to measure a temperature adjacent the light source
Implementation Method 2
The heat sink assembly may extend to the exterior of the housing to dissipate heat from the light source externally
Implementation Method 3
The light source may be disposed at the proximal end of the housing and emitting a light intensity when energized
Implementation Method 4
The heat control circuit may be adapted to allow changing the current supplied to the light source by changing a resistance applied in the heat control circuit
Data Source
AI summary
Portable devices, systems and methods with automated heat control assembly are provided. The portable devices and systems comprise a light source, a current source, a heat control circuit, a temperature sensor and a processor. The current source is electrically coupled to the light source. The heat control circuit adapted to allow changing the current supplied to the light source. The temperature sensor adapted to measure a temperature adjacent the light source and to output an associated temperature sensor data to the processor. The processor configured to automatically adjust the current supply in the heat control circuit based on the temperature sensor data relative to a predetermined temperature threshold. The method comprises measuring a temperature adjacent a light source using a temperature sensor and automatically adjusting, using a processor, the current suppled to the light source based on the temperature sensor data relative to a predetermined temperature threshold.