| Title |
The Color Temperature Flexibility-typed LED Lighting Control System |
| Authors |
김혜명(Kim, Hye-Myeong) ; 양우석(Yang, Woo-Seok) ; 조영식(Cho, Young-Seek) ; 박대희(Park, Dae-Hee) |
| DOI |
https://doi.org/10.5370/KIEE.2015.64.2.284 |
| Keywords |
LED ; Color Temperature ; Lighting system ; Wireless ; Bluetooth |
| Abstract |
The color temperature flexibility-typed Lighting Emitting Diode(LED) lighting control system proposed in this thesis employs Pulse Width Modulation(PWM) technique to control the brightness of LED lighting. The LED lighting used as a light source has 20W downlight composed of two types of LED chips: one is Warm White and the other is Cool white. One multi-sensor module consisting an infrared sensor, an illumination sensor, and a temperature sensor was made, to which Bluetooth wireless communication technique was applied to enable a smartphone application to control lighting brightness and identify the information collected from the sensor. CS-1000, a spectroradiometer, was used to measure LED dimming control and the changing values of a color temperature in eight steps. According to a test, it was found that it was possible to change a color temperature from 3187K of Warm White LED to 5600K of Cool White LED. |