PROBLEM TO BE SOLVED: To provide an illuminating device capable of controlling a light amount to a target light amount with a high degree of accuracy without losing the balance in an outgoing light amount ratio among a plurality of semiconductor light sources, and also to provide an endoscope apparatus equipped with the illuminating device.SOLUTION: An illuminating device includes: a plurality of semiconductor light sources each of which emits light with a spectrum different from one another target light amount setting means for setting a target light amount for a total outgoing light amount light amount ratio setting means for setting an outgoing light amount ratio among the plurality of semiconductor light sources amplitude value setting means for setting an amplitude value of driving signal for each of the semiconductor light sources on the basis of the set outgoing light amount ratio and driving signal generating means for generating each driving signal through the use of common pulse modulation control based on the target light amount, while keeping the driving signal at the set amplitude value. When the target light amount is set, a driving pulse signal corresponding to the target light amount is set in common among the semiconductor light sources. The driving pulse signal is so set at the amplitude values corresponding to the outgoing light amount ratio as to generate individual driving signals for driving the respective semiconductor light sources.COPYRIGHT: (C)2016,JPO&INPIT【課題】複数の半導体光源の出射光量比のバランスを崩すことなく、目標光量に高精度に制御することができる照明装置及びこれを備えた内視鏡装置を提供する。【解決手段】照明装置は、互いに異なるスペクトルの光を出射する複数の半導体光源と、全出射光量に対する目標光量を設定する目標光量設定手段と、複数の半導体光源の出射光量比を設定する光量比設定手段と、設定された出射光量比に基づいて各半導体光源に対する駆動信号の振幅値をそれぞれ設定する振幅値設定手段と、各駆動信号を、設定された振幅値に保持しつつ目標光量に応じた共通のパルス変調制御により生成する駆動信号生成手段とを有する。目標光量が設定されると、その目標光量に応じた駆動パルス信号が各半導体光源に共通に設定され、この駆動パルス信号を出射光量比に応じた振幅値にして各半導体光源を駆動する個別駆動信号が生成される。【選択図】図1
