[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.6109/jicce.2013.11.4.247

Design and Implementation of LED Dimming System with Intelligent Sensor Module

Cho, Young Seek (Center for Advanced Electric Applications, Wonkwang University)
Kwon, Jaerock (Department of Electrical and Computer Engineering, Kettering University)
Kim, Hwan-Yong (Department of Electronic Engineering, Wonkwang University)

Publication Information

Journal of information and communication convergence engineering / v.11, no.4, 2013 , pp. 247-252 More about this Journal

Abstract

An intelligent light emitting diode (LED) dimming system is designed and implemented for energy-saving lighting systems. An LED light bulb is powered by an LED driver controlled by a microcontroller using pulse width modulation (PWM) signals. By changing the duty cycle of the PWM signals, the LED driver generates a driving current of up to 1,000 mA. The current consumption by the LED light bulb exhibits a very linear characteristic that indicates that the level of LED dimming can be finely tuned. Multiple sensors-lighting intensity and ultrasonic range sensors-are combined with the LED dimming system to realize an automatically controllable LED lighting system. The light intensity sensor is capable of sensing ambient light. The ultrasonic range sensor can detect objects from 0.15 to 5.6 m at a resolution of 0.0254 m. The collected information by the light intensity and ultrasonic range sensors is processed by the microcontroller that in turn automatically controls the brightness of the LED light bulb. The algorithm of the software for the LED dimming system is also described.

Keywords

Dimming; LED driver; LED light bulb; Microcontroller; Sensor;

Citations & Related Records

Times Cited By KSCI : 2 (Citation Analysis)

Reference
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