USB Lamp Strip Controller with MCU and Bidirectional Voltage
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Solution Overview
Problem
Conventional lamp strips with LED light sources offer limited functionality, providing only single brightness, single color, and single mode, which fails to meet the increasing user demands for more sophisticated lighting experiences.
Innovation Solution
A USB-powered combination type lamp strip controller that employs a microcontroller unit (MCU) to generate control signals for various lighting modes by combining forward and backward voltages, PWM duty cycles, and voltage supply durations, allowing for multiple color and brightness settings through manual, infrared, and audio control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional lamp strips with LED light sources are used, then the structure is simple and easy to manufacture, but the lighting functionality is limited to single brightness, single color, and single mode
Solution Approach 1:
The controller is designed to provide multiple lighting modes (forward always on, backward always on, forward and backward mixed color, color mixing gradient, color mixing breathing flash, forward flicker, backward flicker, single-side alternate brightness fading in and out, forward and backward wave) and supports various control methods (manual control, infrared remote control, audio control). This multi-functionality allows a single device to meet diverse user lighting needs, transforming the lamp strip from a simple single-mode device to a versatile lighting system that can adapt to different scenarios and user preferences.
2Ease of operation
If multiple control modes and lighting modes are added to meet user demands, then the user experience is improved, but the control system complexity increases
Solution Approach 1:
The controller acts as an intermediary device that manages the complexity of multiple lighting modes and control methods. It receives various control signals (manual button inputs, infrared remote signals, audio signals) and translates them into appropriate control commands for the LED lamp strip. This intermediary approach allows the system to support diverse control options without requiring the lamp strip itself to be overly complex, as the controller handles the sophisticated logic for mode switching, color mixing, brightness adjustment, and timing control.
3Measurement precision
If forward and backward voltages are combined with PWM duty cycle control, then color and brightness control precision is improved, but the control circuit complexity increases
Solution Approach 1:
The system employs dynamic control through PWM (Pulse Width Modulation) duty cycle adjustment to precisely control the brightness and color of the LED lamp strip. By varying the duty cycle of the PWM signal, the controller can dynamically adjust the effective voltage applied to the LED, enabling smooth transitions between different brightness levels and color intensities. This dynamic control method, combined with forward and backward voltage application, allows for precise color mixing and brightness regulation without requiring overly complex analog control circuits.
Solution Approach 2:
The controller changes key electrical parameters including voltage polarity (forward and backward voltages), PWM duty cycle percentage, and voltage supply duration to achieve precise control over LED color and brightness. By manipulating these parameters, the system can produce a wide range of lighting effects from simple on/off states to complex color mixing gradients and breathing flash effects, all while maintaining a relatively straightforward control architecture based on standard PWM techniques.
Data Source
AI summary
The present invention provides a control method and controller for a USB-powered combination type lamp strip, and the method includes steps: S1, a working power source is provided for a lamp strip controller by a power attachment circuit; S2, a microcontroller unit (MCU) control circuit generates a control signal according to a signal collected by a collection circuit, and a drive circuit controls switching of lamp strip lighting modes according to the control signal. The controller is connected with a dichromatic diode to realize several control modes by combination of forward and backward voltages, the microcontroller unit pwm duty cycle, and forward and backward voltage supply durations, so that to realize the combination of multiple control modes, and then control the color of the lamp strip in multiple modes.