| 摘要 |
The present invention relates to an illuminating apparatus. According to an aspect of the present invention, the illuminating apparatus includes a light source driving device and a light source unit having at least one LED which receives light source driving power from the light source driving device. The light source driving device comprises a transformer which includes a primary winding part including first and second external input terminals for receiving external power from a ballast stabilizer and a coil having an impedance level set to allow the ballast stabilizer to output a normal amount of power, and a secondary winding part electromagnetically coupled to the primary winding part to transform the received external power; a rectifying diode for rectifying output power from the secondary winding part of the transformer; a filter having an input terminal and an output terminal outputting light source driving power, delivering rectified power received from the rectifying diode at the input terminal to the output terminal thereof when the rectifying diode is turned on, and storing a partial amount of the rectified power; and an open loop preventing circuit for providing a closed loop for the filter such that power stored in the filter is applied to the output terminal when the rectifying diode is turned off. |
