Intelligent LED Light Temperature Compensation
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Solution Overview
Problem
Conventional LED lighting systems fail to maintain constant brightness across varying temperatures, leading to inefficient energy use and inaccurate dimming due to temperature-dependent light intensity changes and noise issues with remote power supplies.
Innovation Solution
An intelligent power-saving LED light system that adjusts the number of active LEDs based on temperature, using a thermistor and comparators to bypass current to specific LEDs as temperature decreases, ensuring consistent brightness and energy efficiency by reducing the number of active LEDs at lower temperatures and increasing them at higher temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the light intensity of LEDs is adjusted according to heating temperature using conventional dimming control, then energy consumption can be reduced at high temperatures, but brightness uniformity deteriorates at low temperatures and signal noise increases when power supply is installed remotely
Solution Approach 1:
The patent extracts the temperature sensing function from the power supply unit and places it directly at the LED module location. The temperature sensor is integrated into the LED module housing, allowing local temperature measurement without relying on remote power supply signals, thereby eliminating signal noise issues while maintaining energy-saving dimming functionality
Solution Approach 2:
The patent introduces a temperature sensor as an intermediary element between the LED light source and the control system. This sensor directly measures the temperature at the LED module and provides accurate feedback to the control unit, enabling precise brightness adjustment without the signal interference problems associated with remote power supply-based temperature sensing
2Illumination intensity
If all LEDs remain active at low temperatures, then maximum brightness is achieved, but energy consumption increases unnecessarily
Solution Approach 1:
The patent implements dynamic brightness adjustment by continuously monitoring LED module temperature and automatically adjusting the number of active LEDs accordingly. The control unit dynamically changes the operating state of LEDs based on real-time temperature feedback, reducing the number of active LEDs at low temperatures when brightness is naturally higher, and increasing them at high temperatures when brightness diminishes
Solution Approach 2:
The patent changes the operational parameters of the LED system by adjusting the number of active LEDs based on temperature. The control unit modifies the electrical parameters (voltage/current distribution) to different LED groups depending on temperature conditions, optimizing the balance between brightness output and energy consumption across varying temperature environments
3Use of energy by moving object
If the number of active LEDs is reduced at low temperatures, then energy consumption decreases, but brightness uniformity may deteriorate
Solution Approach 1:
The patent segments the LED array into multiple independent controllable groups. The control unit can selectively activate or deactivate specific LED groups based on temperature conditions, allowing fine-grained adjustment of total light output while maintaining uniform distribution patterns. This segmentation enables precise control over the number of active LEDs without compromising overall brightness uniformity
Solution Approach 2:
The patent applies local quality control by adjusting the activation state of specific LED groups located in different positions within the module. The control unit selectively activates LEDs in a pattern that maintains uniform light distribution across the illumination area, ensuring that reducing the number of active LEDs for energy saving does not create hot spots or uneven brightness regions
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 system maintains constant brightness and reduces energy consumption by dynamically adjusting the number of active LEDs in response to temperature changes, enhancing brightness uniformity and reducing manufacturing costs and failure rates.
Implementation Method 1
a temperature change sensing unit having a thermistor so that potential of a specific part is lowered in proportion to a temperature change when temperature gets lower
Implementation Method 2
a plurality of LEDs connected in series from (+) DC power terminal to (−) DC power terminal
Data Source
AI summary
The present invention relates to an intelligent power-saving LED light, which can maintain constant brightness and save energy by reducing the number of lighted LEDs of LED modules as outside temperature of a lighting device, such as a street light, having a plurality of LED modules gets lower. When potential of a specific point of a temperature change sensing unit gets lower by a thermistor, comparators compare sensed potential with set reference potential and supply actuation signals of switching elements in consecutive order so that specific LEDs are turned off in consecutive order.