Endoscope system and light source device therefor
AssigneeOlympus Medical Systems Corp.
InventorsYugo Koizumi, Susumu Kawata, Takahiro Tanabe, Toru Shinoda, Akira Sambongi
Life of this patent
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Abstract
Under usual conditions, a first computation unit computes/outputs a first light adjustment signal in accordance with a photometric signal, and a second computation unit performs control of at least part of the endoscope system. The second computation unit computes/outputs the second light adjustment signal in accordance with the photometric signal together with the at least partial control while suppressing an increase in a processing load when an abnormality has occurred in the first computation unit.
Claims8
An endoscope system that includes an endoscope for emitting illumination light with which a subject is irradiated, comprising:
- an illumination unit for emitting illumination light with which a subject is irradiated;
- an image pickup unit that is provided to the endoscope and that is for picking up an image of the subject illuminated by illumination light;
- a photometric signal generation unit for generating a photometric signal from the image pickup unit;
- a first computation unit for computing/outputting a first light adjustment signal in accordance with the photometric signal generation unit;
- a computation unit state detection unit for detecting a state of the first computation unit;
- a second computation unit for executing partial control of the endoscope system, that is provided as a computation unit different from the first computation unit, and that computes/outputs a second light adjustment signal in accordance with the photometric signal generation unit together with executing the partial control while suppressing an increase in a processing load when the computation unit state detection unit has determined the first computation unit to be abnormal;
- a light adjustment signal control unit for outputting the first light adjustment signal computed/output by the first computation unit when the computation unit state detection unit has determined the first computation unit to be normal, and for outputting the second light adjustment signal computed/output by the second computation unit when the computation unit state detection unit has determined the first computation unit to be abnormal;
- and
- a light adjustment unit for regulating the illumination light in accordance with the light adjustment signal output from the light adjustment signal control unit.
A light source device in an endoscope system including an endoscope that emits illumination light with which a subject is irradiated and that picks up an image of a subject illuminated by the illumination light so as to output a pickup image signal, a video processor that also has a function of generating a photometric signal in accordance with the pickup image signal, and a light source device that inputs the photometric signal so as to supply to the endoscope the illumination light adjusted in accordance with the photometric signal, comprising:
- a first computation unit for computing/outputting a first light adjustment signal in accordance with the photometric signal;
- a computation unit state detection unit for detecting a state of the first computation unit;
- a second computation unit that is for performing entire control of the light source device, that is different computation unit from the first computation unit, and that computes/outputs a second light adjustment signal based on the photometric signal together with executing the entire control while suppressing an increase in a processing load when the computation unit state detection unit has determined the first computation unit to be abnormal;
- a light adjustment signal control unit for outputting the first light adjustment signal computed/output by the first computation unit when the computation unit state detection unit has determined the first computation unit to be normal, and for outputting the second light adjustment signal computed/output by the second computation unit based on the photometric signal when the computation unit state detection unit has determined the first computation unit to be abnormal;
- and
- a light adjustment unit for regulating the illumination light in accordance with the light adjustment signal output from the light adjustment signal control unit.
Dependencies are inferred from the claim text.