| 摘要 |
<P>PROBLEM TO BE SOLVED: To significantly reduce variation in lighting timing when a PWM dimming signal is switched to an ON period next after an OFF period in a light-emitting element lighting circuit which has diode characteristics and performs burst dimming with the PWM dimming signal and an illumination device provided with the circuit. <P>SOLUTION: A light-emitting element lighting circuit comprises: a dimming signal conversion unit (52) which generates a PWM dimming signal of a duty ratio corresponding to a light-emitting level specified by the dimming signal to be input; and a minute electric current generation circuit (C1) which flows minute electric current I<SB POS="POST">min</SB>which applies a voltage exceeding a threshold voltage Vth emitted by the light-emitting element to the light-emitting element when the generated PWM dimming signal is in an OFF period and emits the light-emitting element with a brightness of a lowest light-emitting level specified by the dimming signal or lower. Flowing minute electric current I<SB POS="POST">min</SB>when the PWM dimming signal is in the OFF period makes it possible to slightly emit the light-emitting element and significantly reduce variation in lighting timing when the PWM dimming signal is switched to the ON period next. <P>COPYRIGHT: (C)2013,JPO&INPIT |
