PROBLEM TO BE SOLVED: To provide an endoscopic device, capable of regularly stably obtaining illuminating light having a desired tone, in generation of illuminating light using a phosphor having temperature-dependent emission characteristics, while reducing change in the intensity of fluorescence generated from the phosphor.SOLUTION: The endoscopic device has a light source unit including a light emitting element LD1 and wavelength conversion members 59A, 59B, the light source unit outputting an illuminating light by composing a transmitted light emitted from the light emitting element and transmitted by the wavelength conversion members with a light emitted from the wavelength conversion members. The endoscopic device includes: a drive signal generation unit 67 which generates a pulse drive signal for driving the light emitting element a drive signal conversion unit 69 which divides each pulse of the generated pulse drive signal into a plurality of short pulses having a further short pulse width to generate a divided pulse drive signal so that the light quantity change of the illuminating light resulting from the temperature dependency of emission efficiency of the phosphor is an allowable limit value or less and a light source control unit 61 which drives the light emitting element with the divided pulse drive signal.COPYRIGHT: (C)2013,JPO&INPIT【課題】発光特性に温度依存性を有する蛍光体を用いて照明光を生成する場合に、蛍光体から発生する蛍光強度の変化を軽減して、所望の色調の照明光を常に安定して得られる内視鏡装置を提供する。【解決手段】内視鏡装置は、発光素子LD1、及び波長変換部材59A,59Bを備え、発光素子から出射され波長変換部材を透過した透過光と、波長変換部材からの発光光とを合成した照明光を出力する光源部を有する。また、内視鏡装置は、発光素子を駆動するためのパルス駆動信号を生成する駆動信号生成部67と、蛍光体の発光効率の温度依存性に起因する照明光の光量変化量が許容限度値以下となるように、生成されたパルス駆動信号の各パルスを、更にパルス幅が短い複数の短パルスに分割した分割パルス駆動信号を生成する駆動信号変換部69と、発光素子を分割パルス駆動信号で駆動する光源制御部61とを具備する。【選択図】図1
