Light source device for endoscope
AssigneeFUJIFILM Corporation
InventorSatoshi Narita
Life of this patent
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Abstract
A light source device includes a xenon lamp, a rotary shutter, a main CPU for controlling drive of these components, and a sub CPU. The main CPU operates when receiving a reset cancel signal from a reset circuit. Between the sub CPU and the reset circuit, an AND circuit is provided. When the reset cancel signal from the reset circuit and a lighting completion signal indicating completion of lighting the xenon lamp are both input, the AND circuit outputs the reset cancel signal to the sub CPU. After the output of the lighting completion signal, the sub CPU operates to drive the rotary shutter. When high-frequency noise which occurs at the time of discharging the xenon lamp stops, the rotary shutter is activated and thereby generating pulses of illumination light.
Claims5
A light source device for an endoscope comprising:
- a discharge lamp for emitting illumination light for illuminating inside a human body cavity;
- a lamp controller for controlling emission of said discharge lamp and outputting a lighting completion signal at the time of completing light up of said discharge lamp;
- a rotary shutter opening and closing an optical axis of said illumination light, said rotary shutter alternately providing an illumination period for passing said illumination light and a light-blocking period for blocking said illumination light at a constant period;
- a drive controller for controlling rotation of said rotary shutter;
- and
- an operation controller for activating said drive controller after said lighting completion signal is output, whereas not activating said drive controller before said lighting completion signal is output.
Dependencies are inferred from the claim text.