PROBLEM TO BE SOLVED: To provide a light source device for illumination which eliminates the need of an external power supply device and includes a switching circuit for flash-controlling an LED light source at a predetermined time interval.SOLUTION: The light source device for illumination 100 includes at least an alternating current-direct current rectification part 10 for rectifying an input alternating current to a direct current in the conductive part of a circuit board, a power supply part 20 which is electrically connected to the output part of the alternating current-direct current rectification part 10 and incorporated as a part of the circuit of the circuit board 1, an LED light source 30 which includes a plurality of LEDs 31, a voltage control part 40 which is interposed between the output part of the power supply part 20 and the LED light source 30 and is for controlling a voltage supplied to the LED light source 30, and a switching circuit 50 which is electrically connected between the power supply part 20 and the LED light source 30 and is for flash-controlling the LED light source 30 at the predetermined time interval.SELECTED DRAWING: Figure 1【課題】外部電源装置が不要で、所定の時間間隔でＬＥＤ光源を点滅制御するスイッチ回路を備えた照明用光源装置を実現する。【解決手段】照明用光源装置１００は、回路基板の導電部に、少なくとも、入力交流を直流に整流するための交流－直流整流部１０と、交流－直流整流部１０の出力部に電気的に接続され、回路基板１の回路の一部として内蔵された電源部２０と、複数のＬＥＤ３１を有するＬＥＤ光源３０と、電源部２０の出力部とＬＥＤ光源３０との間に介設され、ＬＥＤ光源３０に供給する電圧を制御するための電圧制御部４０と、電源部２０とＬＥＤ光源３０との間に電気的に接続され、ＬＥＤ光源３０を所定の時間間隔で点滅制御するためのスイッチ回路５０を有する。【選択図】図１
