Lighting Fixture Selectable Color Temperature via LED Current Division
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Solution Overview
Problem
Existing lighting fixtures often require multiple fixtures to produce different color temperatures, which can be inconvenient and inefficient, as they cannot easily adjust to varying consumer preferences or activities without changing the entire lighting setup.
Innovation Solution
A lighting system that controls power to multiple groups of LEDs, allowing for selection of color temperature by dividing current between groups using a single driver output, switch, bleed resistors, multi-channel driver, or potentiometer, enabling discrete or continuous control of color temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple lighting fixtures are used to provide different color temperatures, then color temperature variety is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent combines multiple LED groups with different color temperatures into a single lighting fixture. Each LED group contains LEDs of a specific color temperature (e.g., first group at 2700K, second group at 5000K), and by merging these groups within one fixture, the system provides multiple color temperature options without requiring multiple separate fixtures, thereby reducing device complexity and installation complexity.
Solution Approach 2:
The single lighting fixture is designed to perform multiple functions by incorporating LED groups that can produce different color temperatures. The fixture can operate in different modes (first operational state for one color temperature, second operational state for another color temperature), making it a universal lighting solution that replaces what would traditionally require multiple specialized fixtures.
2Adaptability or versatility
If multiple lighting fixtures are installed to achieve different color temperatures, then lighting options are improved, but installation complexity and space requirements worsen
Solution Approach 1:
By merging multiple LED groups with different color temperature characteristics into a single fixture housing and electrical assembly, the patent enables users to obtain multiple lighting options from one installation unit. This eliminates the need to install and configure multiple separate fixtures, thereby reducing installation complexity and the physical space required for mounting.
Solution Approach 2:
The fixture is designed as a universal mounting unit that can provide different lighting options (color temperatures) through internal switching between LED groups. This multi-functional design means that one fixture installation replaces what would traditionally require multiple fixture installations, simplifying the overall installation process.
3Device complexity
If a single driver output is used to power multiple LED groups, then device complexity is reduced, but current control precision becomes more challenging
Solution Approach 1:
The patent segments the LED groups into distinct electrical circuits, each with its own current control mechanism. Even though a single driver output provides the overall power, each LED group can be independently controlled through switching devices (such as transistors or MOSFETs) that regulate current flow to each group separately, thereby maintaining current control precision while using a simpler single-driver architecture.
Solution Approach 2:
The patent introduces intermediary current control circuits between the single driver output and the LED groups. These intermediary circuits (including switching devices and current regulation components) act as mediators that distribute and precisely control the current from the single driver to each LED group, enabling accurate current control without requiring multiple complex driver outputs.
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 flexible adjustment of color temperature within a single fixture, providing a range of lighting options that can match different consumer preferences or activities without the need for multiple fixtures, improving user convenience and efficiency.
Implementation Method 1
Each group of LEDs may individually provide light at a different color temperature
Data Source
AI summary
A lighting fixture for powering multiple LED groups to generate a selectable color temperature. The lighting fixture provides varying amounts of power to each group of LEDs to achieve a selected color temperature. Current from a driver may be divided between the LED groups based on a selected operational state, which is selected using a switch or other configurable input. The operational states may turn the LED groups on or off or may control an amount of current received by the LED groups. In some configurations, all of the LED groups are always at least partially powered.