LED Lighting Control Apparatus for Dimming and Color Temperature
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Solution Overview
Problem
Standard constant current drivers in LED light fixtures lack advanced control features, limiting their ability to implement energy-saving measures and user experience enhancements, despite becoming commoditized and widely used.
Innovation Solution
A control apparatus is introduced between the power source and the lighting module, featuring a voltage control module and a controller that manages output voltage, allowing for selective coupling of LED groups to the power source based on desired current levels and color temperatures, enabling advanced control features like dimming and color temperature adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If constant current drivers are used to maintain stable current flow through LEDs, then light output consistency is improved, but device complexity and cost increase compared to constant voltage drivers
Solution Approach 1:
A control apparatus is introduced as an intermediary component between the constant current driver and the lighting module. This control apparatus includes a controller that selectively couples different groups of LEDs to the power source, enabling advanced control features without modifying the constant current driver itself. The intermediary handles the complexity of control functions while the driver maintains its simple constant current operation.
Solution Approach 2:
The lighting module is divided into multiple groups of LEDs that can be selectively coupled to the power source. The control apparatus manages these segmented groups independently, allowing for dimming, color temperature adjustment, and other control features. This segmentation enables complex control functionality while keeping the constant current driver design simple and standardized.
2Ease of manufacture
If constant current drivers are commoditized and standardized, then cost and ease of manufacture are improved, but adaptability to advanced control features deteriorates
Solution Approach 1:
The control apparatus serves as an intermediary that bridges standardized constant current drivers and advanced control requirements. By placing the control functionality in a separate, programmable component rather than embedding it in the driver itself, the system maintains driver standardization while achieving control versatility through the adaptable controller.
Solution Approach 2:
The control apparatus is designed to provide multiple control functions including dimming, color temperature adjustment, and selective LED group coupling through a single universal device. This multi-functional controller can work with any standardized constant current driver, providing adaptability without requiring custom driver designs for different control features.
3Ease of operation
If LED groups are selectively coupled based on current levels and color temperatures, then user experience and energy efficiency are improved, but device complexity increases
Solution Approach 1:
The lighting module is segmented into multiple LED groups with different characteristics (current levels, color temperatures). The control apparatus selectively couples these segmented groups to provide dimming and color temperature control. This segmentation enables sophisticated user experience features while keeping each individual LED group simple and manageable.
Solution Approach 2:
The control apparatus implements periodic switching between different LED groups to achieve dimming effects and color temperature transitions. By rapidly alternating between groups with different characteristics and using persistence of vision, the system creates smooth transitions and adjustable light levels without requiring complex analog control circuits.
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 enhances the functionality of constant current drivers by enabling advanced control features, improving user experience and energy efficiency in LED lighting systems, allowing for precise management of light output and color temperature.
Implementation Method 1
The voltage control module is adapted to be coupled to the power source output and is operable to convert the output voltage generated by the power source to a controlled voltage independent of whether the output voltage generated by the power source is the first output voltage or the second output voltage
Implementation Method 2
If the lighting module is coupled to the power source output, the power source is operable to generate a first output voltage to maintain a constant current level flowing through the lighting module
Implementation Method 3
Light Emitting Diodes (LEDs) are increasingly being adopted as general illumination lighting sources due to their high energy efficiency and long service life
Data Source
AI summary
Method and control apparatus for controlling a lighting module based on a constant current level from a power source are disclosed. The control apparatus may be operable: to determine an indication of a constant current level of the power source; to determine an activation ratio in which to activate first and second groups of LEDs each cycle period based upon the indication of the constant current level; and to selectively couple the first and second groups of LEDs to the power source each cycle period based upon the first activation ratio. The first and second groups of LEDs may comprise LEDs of first and second color temperatures respectively. The control apparatus can be adapted to operate as a dim-to-warm module within a lighting apparatus.