Electronic Driver Switch Capacitor Circuit PWM Dimming VLC
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electronic drivers experience reduced lifespan and efficiency due to frequent frequency alterations for pulse width modulation dimming and visual light communication, leading to losses and increased maintenance costs.
Innovation Solution
An electronic driver with a power converter and switch capacitor circuit that operates at different frequencies to perform pulse width modulation dimming and visible light communication, maintaining a constant output current through differential power gain, allowing for independent modulation of light without affecting the main dimming circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the frequency of the entire electronic driver is altered to perform pulse width modulation dimming and visual light communication, then the illumination device can be dimmed and communicate visually, but the electronic driver experiences losses and reduced life span
Solution Approach 1:
The patent divides the frequency alteration function into two independent parts: the power converter maintains a fixed operating frequency, while a separate switch capacitor circuit performs frequency alterations for PWM dimming and VLC. This segmentation isolates the stress of frequent frequency changes from the main power converter, extending its life span while preserving adaptability.
Solution Approach 2:
The switch capacitor circuit acts as an intermediary between the fixed-frequency power converter and the illumination device. It translates the fixed frequency into variable frequency signals for PWM dimming and VLC, allowing the power converter to operate stably without direct frequency alterations.
2Adaptability or versatility
If the frequency of the entire electronic driver is frequently altered, then PWM dimming and VLC can be achieved, but energy losses increase
Solution Approach 1:
By separating the power conversion function from the modulation function, the patent eliminates energy losses in the power converter. The switch capacitor circuit handles frequency alterations with minimal energy consumption, while the power converter operates efficiently at a fixed frequency.
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 extends the operating life of electronic drivers, reduces maintenance costs, and provides a flexible, cost-effective method for implementing PWM dimming and VLC, maintaining consistent illumination levels.
Implementation Method 1
a resonant tank circuit operatively coupled to the first string and including a resonant inductor and a blocking capacitor operatively coupled to each other in series
Implementation Method 2
a transformer including a primary winding and a secondary winding, where a first end of the primary winding is operatively coupled in series to the blocking capacitor of the resonant tank circuit
Implementation Method 3
a rectifier operatively coupled in series to the secondary winding of the transformer
Data Source
AI summary
An electronic driver for operating an illumination device is provided. The electronic driver includes a power converter configured to illuminate the illumination device. The power converter includes a switch capacitor circuit configured to perform at least one of a pulse width modulation dimming and a visible light communication using the illumination device. The switch capacitor circuit includes a plurality of split capacitors operatively coupled in series to a second end of a primary winding of a transformer in the power converter and a control switch operatively coupled to the plurality of split capacitors. The power converter also includes a controller operatively coupled to the control switch and is configured to control the control switch to perform at least one of the pulse width modulation dimming and the visible light communication.