| 摘要 |
<p>A light source device for an endoscope comprising a xenon lamp, a lamp drive circuit for supplying current to the xenon lamp for causing the emission of light when a synchronizing signal is supplied from a camera, an integrating circuit for integrating current supplied from the camera and an illumination stop circuit for supplying an illumination stop signal to a lamp drive circuit when the output of said integrating circuit reaches a predetermined value. The device further comprises a first timer circuit for producing a first signal for a first predetermined period of time responsive to the synchronizing signal from the camera, a second timer circuit for producing a second signal for a second predetermined period of time after the time out of the output of the first timer circuit, and a gate circuit for rendering a third timer circuit non-conductive during the presence of the second signal, the synchronizing signal from the camera being supplied through the gate circuit to the lamp drive circuit to cause the xenon lamp to emit light for photographing.</p> |
