Series LED Light Adjustment Circuit with Dual Color Temperature Control
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Solution Overview
Problem
Existing light adjustment and tone adjustment control circuits for smart lighting are complex, costly, and offer limited user selectivity.
Innovation Solution
A control circuit design that connects two LED light sources with different color temperatures in series, allowing for adjustable output current through a power supply circuit to achieve light adjustment and tone adjustment, with optional switch circuits for expanded color temperature combinations and compatibility with various dimmer and power supply types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing light adjustment and tone adjustment control circuits are used, then light brightness and color temperature can be adjusted, but the circuit design becomes complicated and operating cost increases
Solution Approach 1:
The patent combines light adjustment and tone adjustment functions into a single integrated control circuit. The circuit uses one power supply unit that can simultaneously control both brightness adjustment (through PWM dimming) and color temperature adjustment (by switching between warm and cold light LED strings), eliminating the need for separate control circuits for each function.
Solution Approach 2:
The power supply unit is designed to perform multiple functions: it provides power supply, implements light brightness adjustment through PWM control, and achieves tone adjustment by switching between different LED strings. This multi-functional design reduces the overall system complexity while maintaining full adjustment capabilities.
2Adaptability or versatility
If existing light adjustment and tone adjustment control circuits are used, then light brightness and color temperature can be adjusted, but user selectivity is reduced
Solution Approach 1:
The circuit dynamically switches between different operating modes based on control signals. The power supply unit can adjust PWM duty cycles and switch between different LED string configurations in real-time, providing users with flexible and dynamic control over light output characteristics.
Solution Approach 2:
The LED lighting system is segmented into multiple independent LED strings (warm light string and cold light string), each可控 through the power supply unit. This segmentation allows users to independently control which strings are activated and at what brightness levels, enhancing user selectivity.
3Device complexity
If multiple LED light sources with different color temperatures are connected in series, then circuit design becomes simple and operating cost decreases, but the ability to provide diversified light source configurations is limited
Solution Approach 1:
The series-connected LED string configuration is made dynamically reconfigurable through switching elements. The power supply unit can switch between different series connections (e.g., connecting only warm light LEDs, only cold light LEDs, or both in series) based on control signals, providing configuration diversity while maintaining the simplicity of series connection topology.
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 results in a simple circuit design with low operating costs and enhanced user experience through diversified light source configurations and adaptable functionality.
Implementation Method 1
an output end of the power supply circuit is connected with a first LED light source and a second LED light source
Data Source
AI summary
The invention discloses a light adjustment and tone adjustment control circuit, which comprises a power supply circuit and a light adjustment circuit connected with the power supply circuit. An output end of the power supply circuit is connected with a first LED light source and a second LED light source. The two LED light sources are connected in series, and the tube pressure and color temperature of the first LED light source and the second LED light source are different; the invention also discloses a realization method of a light adjustment and tone adjustment control circuit. In the present invention, at least two LED light sources with different tube pressures and color temperatures are connected in series to form a whole light source, and the output current of the power supply circuit can be changed by the light adjustment circuit to realize light adjustment and tone adjustment, which has the characteristics of simple circuit design and low operating cost.