The Design of Drive Circuit for Light Source System of UV - LED Green Printing Dryer

摘要

UV-LED drying technology in printing is an energy-saving, environmentally friendly green drying technology. Compared with the traditional UV drying method, it can reduce 70%-90% of the power consumption; In addition, the drying device does not produce ozone, no VOC (volatile organic matter) emissions. At present, the technology has become a research hotspot in the printing area at home and abroad. Drive circuit of UV-LED light source system is one of the key technologies of UV-LED drying equipment, as a single UV-LED chip power is only a few watts, which can't meet the demands of drying power, it is necessary to form a number of chips that integrated UV-LED light source system, which requires that the drive circuit has high stability in order to improve the reliability and the service life of the drying device. In this paper, a light source system composed of 72 LED chips in array arrangement is introduced, and it mainly introduces that the driving circuit of the LED chip is directly driven by rectifying and valley fill circuit. The experiment and test results show that the driving circuit can not only meet the drying power requirements of LED light source system, but also compensate and improve the chip power according to the actual needs of the curing system, so that working reliability and service life of the drying device can be improved.