Halftone control method in white light leds by using an embedded remote controller with ZigBee communication

摘要

In this paper we design an automatic light controller which consists of two parts: an LED array with a control unit and an embedded remote controller with ZigBee communication. The LED array includes both an LED array and a transmission controlled module. We use the halftone method to transform different LED array patterns into gray patterns and use those different halftone patterns to control the LED on/off which can adjust the LED light brightness, just like using PWM. We use ZigBee technology to send a brightness control signal as a distance measurement by means of an embedded remote controller. Visual Studio is used as the development software for our design of the graphic interface to provide a user-friendly operation.