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

Author

Hung, Chi-Huang ; Bai, Ying-Wen

Author_Institution

Grad. Inst. of Appl. Sci. & Eng., Fu Jen Catholic Univ., Taipei, Taiwan

fYear

2010

fDate

2-5 May 2010

Firstpage

1

Lastpage

6

Abstract

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.

Keywords

LED lamps; brightness; control engineering computing; graphical user interfaces; optical control; telecontrol; LED array; LED light brightness; Visual Studio; ZigBee communication; distance measurement; embedded remote controller; graphic interface; gray patterns; halftone control method; halftone patterns; white light LED; Arrays; Brightness; Light emitting diodes; Lighting; Pulse width modulation; Software; Zigbee; Halftone; ZigBee; white light LED;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering (CCECE), 2010 23rd Canadian Conference on

Conference_Location

Calgary, AB

ISSN

0840-7789

Print_ISBN

978-1-4244-5376-4

Electronic_ISBN

0840-7789

Type

conf

DOI

10.1109/CCECE.2010.5575227

Filename

5575227