Olympus Corporation

Naruyasu Kobayashi

Kazuhiro Takizawa

Satoshi Tanaka

Takayuki Sato

Motoo Azuma

Hisashi Nishimura

Kaoru Kotoda

An endoscope apparatus includes an endoscope that includes an imaging section that captures an object, and an illumination section that includes an irradiation port that illuminates the object, the imaging section and the illumination section being provided in an end section of the endoscope, a distance information acquisition section that acquires distance information about a distance from the end section of the endoscope to the object, a light distribution pattern determination section that determines a light distribution pattern of illumination light applied from the illumination section based on the acquired distance information, and a gradation correction section that performs a gradation correction process on a captured image acquired by the imaging section.

Endoscope apparatus, method for operating endoscope apparatus, and information storage device

A phase control unit compares a phase of a display synchronization signal with a phase of a clock signal generated from a clock signal generated by an imaging clock generating unit, and controls oscillation of the imaging clock generating unit based on a result of the comparison. A drive signal generating unit generates a drive signal that drives a CMOS sensor based on a multiplication clock signal synchronized to the clock signal.

Electronic endoscopic apparatus

A CMOS sensor converts optical information into an electric signal, and outputs the converted electric signal as an image signal. An imaging clock generating unit generates an imaging clock acting as a source of a drive signal that drives the CMOS sensor. A drive signal generating unit generates an imaging synchronization signal and a drive signal based on the imaging clock. A display clock generating unit generates a display clock. A display synchronization signal generating unit generates a display synchronization signal based on the display clock. A phase comparing unit compares a phase of the imaging synchronization signal with a phase of the display clock, and controls oscillation of the display clock generating unit based on a result of the comparison.

A phase comparing unit compares a phase of an imaging-side synchronization signal with a phase of a display-side clock, and controls oscillation of a display-side clock generating unit based on a result of the comparison. A display timing adjusting unit receives a video signal output from an endoscope at a timing based on the imaging-side synchronization signal and adjusts a synchronization timing of the received video signal to a synchronization timing based on a display-side synchronization signal.

Electronic endoscope apparatus

An electronic endoscopic apparatus includes an endoscopic scope and an image processing processor. The endoscopic scope includes a solid-state imaging device, an imaging-side multiplying unit, and an imaging synchronization signal generating unit. The image processing processor includes a display clock generating unit, a monitor synchronization signal generating unit, a master imaging clock generating unit, a processor-side multiplying/dividing unit, a phase-comparison oscillation control unit, and a display timing adjustment unit.

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Kawasaki, Japan

Naruyasu Kobayashi