| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power circuit for lighting in which an increase of special manufacturing management processes and parts to be mounted is restrained, and dispersion (variation) in illuminance among circuits is small. <P>SOLUTION: A power circuit for lighting which rectifies an AC voltage 1, generates a smoothed direct current, and supplies it to an illumination light, includes an adjustment circuit Oj which adjusts a current value detection level of a detection current according to a variation in an oscillatory frequency of an oscillator 63 in a manner that an average of the current supplied to the illumination light 4 is constant. <P>COPYRIGHT: (C)2012,JPO&INPIT |
