Title :
Improvements of Flashing mode by programmed control for multiple colors in LED optical stimulus system
Author :
Ishii, Ken ; Takayama, Go ; Inada, Hiroshi ; Miki, Tomohiro ; Narumi, Makoto ; Sakurai, Yasunori
Author_Institution :
Nat. Res. Inst. of Fisheries Eng., Fisheries Res. Agency, Kamisu, Japan
Abstract :
Behavior observation examination of Japanese flying squid against optical stimulus is scheduled. A LED optical resource system has been designed as an optical stimulus for this examination. Two kinds of a LED driver and panel system were developed. One consists of constant current power supply units. The other is a LED driver based on Pulse Width Modulation (PWM). About the former, a control and monitor program via a personal computer (PC) was developed. In this paper, the former was described in detail. By control of two parameters of preset current and voltage to a constant current power supply unit, a waveform of LED current was improved. Leading-up time is shorter than nominal value. Overshoot was improved in comparison with a MOSFET switch control. Flashing worked in LED current higher than rated current value.
Keywords :
LED displays; LED lamps; electric current control; optical control; voltage control; Japanese flying squid; LED optical resource system; LED optical stimulus system; MOSFET switch control; PWM; flashing mode improvement; multiple colors; programmed control; pulse width modulation; Color; Image color analysis; Light emitting diodes; Lighting; Optical pulses; Power supplies; Constant current power supply; Flashing; LED; Overshoot suppression;
Conference_Titel :
Control Automation Robotics & Vision (ICARCV), 2010 11th International Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-7814-9
DOI :
10.1109/ICARCV.2010.5707293
