LIGHTING DEVICE AND ILLUMINATING FIXTURE USING THE SAME

PROBLEM TO BE SOLVED: To provide a lighting device and an illuminating fixture using the same, capable of suppressing flickers at a time when a light-emitting element at dimming is seen through video equipment, by a simple circuit configuration.SOLUTION: A lighting device 1 comprises: a DC power supply part 11; a series circuit of an LED 31 and a transistor Q2, connected between output ends of the DC power supply part 11; and a current adjustment part 12 changing a current flowing in the LED 31 in a stepwise manner by changing a voltage to be applied to a gate of the transistor Q2 in a stepwise manner according to a light control signal S1 of the dimmer 2. 【課題】簡単な回路構成により映像機器を通して調光時の発光素子を見たときのちらつきを抑えた点灯装置及びそれを用いた照明器具を提供する。【解決手段】点灯装置１は、直流電源部１１と、直流電源部１１の出力端間に接続されるＬＥＤ３１及びトランジスタＱ２の直列回路と、調光器２の調光信号Ｓ１に従ってトランジスタＱ２のゲートに印加する電圧を段階的に変化させることでＬＥＤ３１に流れる電流を段階的に変化させる電流調整部１２と、を備えている。【選択図】図１