LED Lighting Fixture Controller for Color Temperature and Intensity
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Solution Overview
Problem
Existing lighting fixtures require multiple units to produce different color temperatures and intensities, which is inefficient and limits user preferences and applications.
Innovation Solution
A light fixture controller that uses multiple LED groups and a single-channel driver to adjust color temperature and intensity by controlling ON/OFF cycles and current flow through pulse width modulation and dimming signals, allowing a single fixture to produce various color temperatures and intensities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple lighting fixtures are used to provide different color temperatures and intensities, then the variety of lighting options is improved, but the device complexity and cost increase
Solution Approach 1:
The patent divides a single lighting fixture into multiple LED groups, where each group contains LEDs of different color temperatures (e.g., warm white, cool white, daylight). By controlling the activation and combination of these segmented LED groups, the fixture can produce a range of color temperatures and intensities, replacing the need for multiple separate fixtures.
Solution Approach 2:
The patent makes a single lighting fixture universal by enabling it to perform multiple lighting functions simultaneously. The fixture can adjust color temperature, control intensity, and create various lighting scenes within one unit, making it capable of replacing multiple specialized fixtures and serving diverse lighting needs in different environments.
2Adaptability or versatility
If multiple lighting fixtures are installed to achieve different lighting effects, then the lighting flexibility is improved, but the installation space and cost increase
Solution Approach 1:
The patent merges multiple lighting functions and multiple LED groups into a single integrated fixture. By combining warm white LEDs, cool white LEDs, and daylight LEDs in one fixture with unified control circuitry, it consolidates what would traditionally require multiple separate fixtures, thereby reducing installation space while maintaining lighting flexibility.
Solution Approach 2:
The fixture achieves multi-functionality by incorporating adjustable color temperature control and intensity control within a single unit. This allows one fixture to replace multiple fixtures that would otherwise be needed to achieve the same lighting flexibility, reducing the overall installation space required.
3Adaptability or versatility
If a single lighting fixture uses multiple LED groups for color temperature control, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The control system is segmented into separate control circuits for different LED groups. Each LED group has its own control circuit that can be independently activated, allowing the controller to manage multiple color temperatures by selectively turning on or off specific LED groups based on the desired output.
Solution Approach 2:
The controller uses periodic switching or pulse-width modulation (PWM) techniques to control the activation of different LED groups. By periodically switching between different LED group combinations, the system can dynamically adjust color temperature and create smooth transitions between different lighting modes without requiring complex continuous control circuitry.
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
Enables a single lighting fixture to produce a range of color temperatures and intensities, enhancing user flexibility and reducing the need for multiple fixtures, while using off-the-shelf drivers and intuitive programming interfaces.
Implementation Method 1
The first LED group includes a first set of LEDs and is configured to produce light at a first color temperature. The second LED group includes a second set of LEDs and is configured to produce light at a second color temperature.
Implementation Method 2
The control signals further include a dimming control signal configured for controlling the driver of the light fixture to adjust the current flowing through the first LED group and the second LED group based on the intensity setting for the light fixture.
Data Source
AI summary
A light fixture controller is configured for controlling the color temperature and intensity of a light fixture that includes at least two LED groups. Each LED group includes multiple LEDs configured to produce light at certain color temperatures. The light fixture controller receives a color temperature setting and an intensity setting for the light fixture and generates control signals based on these settings. A first control signal only turns on the first LED group for a first duration of a cycle and a second control signal only turns on the second LED group for a second duration of the cycle. The ratio between the first and second duration is determined based on the color temperature setting. The control signal further includes a dimming control signal for controlling a current flowing through the LED groups based on the intensity setting for the light fixture.