Olympus Corporation

Olympus Medical Systems Corporation

Nintendo Co., Ltd.

Game Freak Inc.

Tomoya Takahashi

Yusuke Yabe

Takahiro Masaki

Susumu Hashimoto

Satoshi Tanaka

Atsushi Shimada

Koji Omori

Aiko Sakai

Masato Toda

Kotaro Ogasawara

Kyosuke Mizuno

Yutaka Shirota

Daisuke Akiyama

Mutsumi Oshima

Mutsumi Ohshima

Shinji Yamashita

Kazuhiro Gono

Akihiko Mochida

Seiki Toriyama

Keiichi Tsuchida

Shoichi Amano

Masaaki Watanabe

Ryo Machida

Yasuo Komatsu

Yusuke Yoshida

Yasukazu Kogen

Manabu Yajima

Kazue Hongo

Rihito Ishikawa

Tetsuya Watanabe

Wataru Ono

Kazuki Yoshihara

Takahiro Hayama

A light source device for endoscope includes a rotational body configured to rotate with a rotational axis as a center; a fluorescent body arranged in a predetermined area of the rotational body and configured to generate fluorescence by excitation light being radiated; an illuminating portion capable of selectively radiating excitation light of a first quantity and excitation light of a second quantity which is larger than the first quantity to a fluorescent body; and a control portion configured to switch between a first state of radiating the excitation light of the first quantity to the fluorescent body arranged in a first area and a second state of radiating the excitation light of the second quantity to the fluorescent body arranged in a second area.

Light source device for endoscope and endoscope system

A light source device for endoscope includes: an irradiation portion capable of radiating excitation light; a rotating body provided on an optical axis of the excitation light and configured to rotate with a rotating shaft as a center; a phosphor arranged in an irradiation area of the excitation light, and configured to generate fluorescence by being irradiated with the excitation light; a light quantity control portion configured to control irradiation intensity or irradiation time of the excitation light; and a rotation control portion configured to rotate the rotating body at a predetermined speed when the excitation light is radiated with a first irradiation intensity or time and rotate the rotating body faster than the predetermined speed when reducing the irradiation intensity or the irradiation time of the excitation light is reduced in the irradiation intensity or time vis-a-vis the first ones.

An endoscope apparatus includes: a first semiconductor light-emitting element; a light source drive section; a first detection section; a storage section configured to store a threshold value indicating whether or not the first detection section can correctly detect an intensity; and a control section configured to, if the intensity detected by the first detection section exceeds the threshold value stored in the storage section, control the current value of the drive signal based on the intensity detected by the first detection section, for the light source drive section, and if the intensity detected by the first detection section does not exceed the threshold value, perform control so as to make the current value of the drive signal constant to provide pulsed light emission and change a duty cycle or a number of pulses to perform light adjustment, for the light source drive section.

Endoscope apparatus

An image pickup system includes a light source apparatus and a light-source control section performing first control for setting a duty width and perform second control for, after the duty width is set to a minimum duty width by the first control, changing supply timing of the illumination light not to supply the illumination light in a period other than the period where the light amount control by the PWM is permitted and to supply, in the period where the light amount control by the PWM is permitted, light having a light amount integrated value equal to a light amount integrated value supplied in the period other than the period where the light amount control by the PWM is permitted, and an image pickup apparatus, where data representing a driving current value after the change of the supply timing and a value of the pulse width is stored.

Image pickup system

A light source apparatus includes: a light source; a light source driving section; a light detection section; a temperature detection section; and a control section being configured to, when determining that detected brightness is outside a range of brightness set for detecting abnormality in the light source or the light detection section and detected temperature is within a range of temperature set for detecting the abnormality in the light source or the light detection section, cause the light source driving section to perform driving of the light source for a case of abnormality in the light detection section, and when determining that the detected brightness is outside the range of brightness and the detected temperature is outside the range of temperature, cause the light source driving section to perform driving of the light source for a case of abnormality in the light source.

Light source apparatus

An image pickup system includes an optical sensor configured to pick up an optical image of an object illuminated with light of a plurality of colors emitted from a plurality of semiconductor light emitting elements with an image pickup device and detect each of light amounts of the light emitted from the plurality of semiconductor light emitting elements, and a controller including hardware. The controller adjusts color balance based on the light amounts of the plurality of colors detected at the optical sensor and sets an exposure timing of a light amount detecting unit according to image pickup operation of the image pickup device.

Image pickup system and light source apparatus

A light source device includes a semiconductor light source, a light source control section, an optical sensor, a sensor control section, and an intensity adjusting section. The light source control section controls a light quantity per field of light to be emitted from the semiconductor light source, by pulse width modulation. The optical sensor receives the light emitted from the semiconductor light source to acquire a quantity of the received light. The sensor control section controls the optical sensor to detect the light in an exposure period shorter than a minimum pulse width in the pulse width modulation, thereby acquiring the quantity of the received light which is acquired by the optical sensor. The intensity adjusting section adjusts emission intensity of the semiconductor light source on the basis of the quantity of the received light.

Light source device and control method of light source device

An endoscope apparatus includes: first and second cooling units configured to cool first and second light source portions; an image pickup portion configured to generate a picked-up image; and a cooling control portion configured to control amounts of light emission of the light source portions while maintaining an amount-of-light ratio so that the brightness of the picked-up image becomes the target brightness and control cooling based on the information about the amount-of-light ratio and the brightness control information; wherein the cooling control portion decides a cooling capacity of the first cooling units and a cooling capacity of the second cooling units for cooling the respective light source portions for which the amounts of light emission are controlled, at the cooling ratio, so as to cause the light source portions to be included within a predetermined temperature range, based on the brightness control information.

A light source apparatus includes: a control section that acquires information relating to a ratio of a light amount value for light with second wavelength band to a light amount value for light with first wavelength band, obtains a light amount value for the light with the first wavelength band so that an observation image has a predetermined brightness, and, from the information relating to the ratio, determines a light amount value for the light with the second wavelength band, and generates light adjustment information for making first and second semiconductor light sources emit light with the light amount value for the light with the first wavelength band and the light amount value for the light with the second wavelength band; and a drive section that, based on the light adjustment information generated by the control section, drives the first and second semiconductor light sources.

Light source apparatus for driving light sources based on generated light adjustment information

An endoscope system including a control section that controls an LED driving section to supply driving currents to LEDs of a plurality of colors to cause the LEDs to emit lights in a frame-sequential manner and a processor that divides a total exposure period in one frame period of the frame-sequential light emission into ratios of light emission periods for each of the respective colors obtained by dividing light amount ratios of the lights of the plurality of colors, which should be received in a CCD, respectively by respective maximum light emission intensities of the LEDs of the plurality of colors and sets respective maximum light emission periods of the LEDs of the plurality of colors.

Endoscope system with frame-sequential light emission

A light source apparatus includes first and second light sources having different maximum light amounts used, a first light amount detection section detecting a light amount of first light of the first light source, a second light amount detection section detecting a light amount of second light of the second light source, a light amount limiting section limiting a light amount of light incident upon the second light amount detection section so that light amounts detected in the first light amount detection section and the second light amount detection section match a predetermined value within a detection range when light with the maximum light amounts used are emitted from the first light source and the second light source, and a control section controlling amounts of light emission of the first light source and the second light source based on detection results of the first and second light amount detection sections.

A light source apparatus includes a cooling device configured to be able to cool a semiconductor light-emitting device, a light-emitting device drive section that supplies a semiconductor light-emitting device drive signal to the semiconductor light-emitting device, a cooling device drive section that supplies a cooling device drive signal to the cooling device, a semiconductor light-emitting device drive control section that sets a duty ratio of the semiconductor light-emitting device drive signal and controls an amount of light emission of the semiconductor light-emitting device, and a cooling device drive control section that generates the cooling device drive signal having a same duty ratio as the duty ratio of the semiconductor light-emitting device drive signal and having timing synchronized with the semiconductor light-emitting device drive signal and adjusts a signal level of the cooling device drive signal based on a measurement result of a temperature of the semiconductor light-emitting device.

Light source apparatus and endoscope apparatus

A control apparatus includes a control unit configured to control a cycle from a first irradiation start timing to a second irradiation start timing to be shorter than a cycle of each of first and second picture periods. The first irradiation start timing is a timing at which a light source device starts radiating pulsed illumination light in the first picture period in which an image pickup device performs reading. The second irradiation start timing is a timing at which the light source device starts radiating the illumination light in the second picture period succeeding the first picture period and having the same cycle as the first picture period.

Control apparatus and imaging system

An endoscope light source apparatus includes a turret provided with a first optical filter and a second optical filter for transmitting an illuminating light, an instruction section in which an operation instruction of the turret is inputted, a drive section that drives the turret, a first detector that detects a position of the turret, a first detected portion for identifying a position of the first optical filter, a second detected portion for identifying a position of the second optical filter, a second detector that optically detects a position of the first or the second detected portion, and a turret control section that outputs a drive signal to the drive section to move the turret until the first or the second detected portion is detected by the second detector and stop the turret in response to the first or the second detected portion being detected.

Endoscope light source apparatus and endoscope system

An imaging system includes: an illumination unit configured to emit illumination light for illuminating a subject; a light receiving unit in which pixels are arranged two-dimensionally, each pixel being configured to receive light and generate an electric signal by performing photoelectric conversion of the light; a readout unit configured to sequentially read out the electric signal from the light receiving unit for every horizontal line; and an illumination controller configured to keep intensity of the illumination light emitted from the illumination unit constant in at least a part of a readout period where the readout unit reads out the horizontal line of the light receiving unit in one frame or one field period, and configured to variably control an illumination time of the illumination light emitted from the illumination unit, outside the readout period.

Growing community of inventors

Hachioji, Japan

Tomoya Takahashi