| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting device in which flickering of a high pressure discharge lamp is prevented, and a service lifetime has been improved by suppressing overshoot occurring in a voltage waveform of an AC lamp voltage. SOLUTION: An igniter circuit 22 which applies an AC starting voltage for initial starting to the high pressure discharge lamp 21 such as a high pressure mercury lamp, and an AC conversion circuit 23 which applies an AC lamp voltage for normal starting of the high pressure discharge lamp 21 are provided, and an overshoot correction circuit 35 which applies a correction voltage to the AC lamp voltage has been installed so as to offset the overshoot occurring at discontinuous points of the voltage waveform of the AC lamp voltage. COPYRIGHT: (C)2006,JPO&NCIPI |
