| 摘要 |
A low-cost, high-reliability, high-luminance light source is provided without the need to provide a spare light source. An LED light source device (1) includes a plurality of LEDs (3); a light-guide optical unit (5) that guides illumination light emitted from the LEDs (3) to an illuminated region; a motor (7) that relatively moves the light-guide optical unit (5) and the LEDs (3); an LED lighting control circuit (33) that drives the LEDs (3) to blink in synchronization with the relative motion effected by the motor (7); a light-level sensor (9) that detects the light level of the illumination light guided to the illuminated region; and a fault determination unit (35) that stops the blinking driving effected by the LED lighting control circuit (33) and continuously lights all of the LEDs (3) when the light level of the illumination light detected by the light-level sensor (9) reaches or falls below a prescribed threshold. |
