| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an on-vehicle lighting fixture with a plurality of light sources at a low cost. <P>SOLUTION: A lighting circuit for lighting the on-vehicle lighting fixture with the plurality of light sources each of which has at least one light-emitting diode, comprises a switching regulator for outputting an output voltage based on a power voltage received from an external DC power supply; a light source selecting part for sequentially selecting the plurality of light sources, and supplying supply currents to the selected light sources by applying output voltages from the switching regulator to the selected light sources; and an output control part for controlling the output voltages output from the switching regulator to the selected light sources, according to the supply currents supplied to the light sources selected by the light source selecting part. <P>COPYRIGHT: (C)2004,JPO</p> |
