Driving circuit using the constant current for improving power factor

摘要

The present invention relates to a power factor improvement and constant current driving device, and more particularly, to a power factor improvement and constant current driving device. In addition, the present invention includes a first LED group including a plurality of LED arrays connected to the output terminal of one side of the AC power supply to the input side; A first constant current circuit in which an input side is connected to an output side of the first LED group; A first charging/discharging unit connected to an output terminal of an AC power supply whose input side supplies power; A first driving current control unit connected to an output terminal of an AC power supply whose input side supplies power; A second charging and discharging unit connected in series with the first charging and discharging unit; A second LED group connected in parallel to the second charging/discharging unit and including a number of LED arrays different from the number of LED arrays included in the first LED group; A second constant current circuit having an input side connected to an output side of the second LED group to provide a constant current to the second LED group; A second driving current controller connected in parallel to the second LED group; A third constant current circuit whose input side is connected to the second driving current controller; A fourth constant current circuit connected to the second LED group and a second charging/discharging unit to provide a constant current; And a third driving current control unit positioned between the first LED group and the second charging/discharging unit and the fourth constant current circuit to improve power factor and eliminate flicker.