Lamp Control System for Simultaneous Brightness and Color Temperature Adjustment
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Solution Overview
Problem
Current lamp systems face challenges in adjusting brightness while simultaneously adjusting color temperature, with complex circuit structures and high hardware costs, making it difficult to achieve simple and effective control.
Innovation Solution
A lamp control system comprising an LED light source assembly, AC input end, on-off switch, EMI filter circuit, rectifier filter circuit, buck circuit, rectifier output circuit, voltage stabilizing circuit, and control circuit, where the on-off switch's turn-off time is controlled to adjust brightness and color temperature without mutual interference, featuring a simple circuit structure and low hardware cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional separate control circuits for brightness and color temperature are used, then both functions can be achieved, but the circuit structure becomes complicated and hardware cost increases
Solution Approach 1:
The patent combines the brightness adjustment circuit and color temperature adjustment circuit into a single integrated control system. The controller receives a single control signal and simultaneously regulates both the brightness (via PWM duty cycle) and color temperature (via switching between different LED chips), eliminating the need for separate control circuits and reducing overall system complexity.
Solution Approach 2:
The controller is designed with multi-functionality, capable of performing both brightness regulation and color temperature adjustment through a unified control interface. By using a single controller that can execute multiple functions, the patent avoids duplicating control hardware, thereby simplifying the circuit structure while maintaining full adjustment capabilities.
2Adaptability or versatility
If traditional separate control circuits for brightness and color temperature are used, then both functions can be achieved, but hardware cost increases
Solution Approach 1:
The patent merges the control functions into a single integrated controller, reducing the total number of control components required. This consolidation directly lowers hardware costs by eliminating duplicate circuitry and reducing the bill of materials while maintaining full brightness and color temperature adjustment capabilities.
Solution Approach 2:
The universal controller design performs multiple functions (brightness control and color temperature control) through a single device, reducing the need for multiple specialized components. This multi-functionality approach decreases overall hardware expenditure while preserving complete adjustment versatility.
3Illumination intensity
If PWM dimming is used for brightness control, then effective brightness adjustment is achieved, but color temperature adjustment becomes difficult to implement simultaneously
Solution Approach 1:
The patent segments the lighting system into multiple independent LED chip modules with different color temperatures (e.g., warm white, neutral white, cool white). By dividing the light source into discrete segments with distinct color characteristics, the system can selectively activate or dim specific segments to achieve color temperature adjustment while maintaining PWM-based brightness control through the duty cycle of the control signal.
Solution Approach 2:
The system dynamically switches between different LED chip segments based on the control signal requirements. The controller can dynamically adjust the activation state of different color temperature LEDs in real-time, enabling simultaneous or independent control of brightness (via PWM duty cycle) and color temperature (via segment switching) without mutual interference.
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 easy implementation of brightness and color temperature adjustments without interference, with a stable and cost-effective circuit operation, suitable for various lighting requirements.
Implementation Method 1
an EMI filter circuit, a rectifier filter circuit
Implementation Method 2
a rectifier filter circuit
Implementation Method 3
a first film capacitor, a second film capacitor
Implementation Method 4
a buck circuit, a rectifier output circuit
Implementation Method 5
a buck inductor
Implementation Method 6
the rectifier filter circuit, the voltage stabilizing circuit, the control circuit, and the buck circuit form a closed-loop circuit
Data Source
AI summary
Disclosed are a lamp control system and a control method thereof. The lamp control system includes: an LED light source assembly, an AC input end, an on-off switch, an EMI filter circuit, a rectifier filter circuit, a buck circuit, a rectifier output circuit, a voltage stabilizing circuit, and a control circuit; the EMI filter circuit is connected to the AC input end through the on-off switch; the EMI filter circuit, the rectifier filter circuit, the buck circuit, and the rectifier output circuit are electrically connected in sequence; the rectifier filter circuit, the voltage stabilizing circuit, the control circuit, and the buck circuit form a closed-loop circuit, the rectifier output circuit is electrically connected to the LED light source assembly.