Mitsubishi Electric Corporation

Fuji Photo Film Company, Limited

Sony Corporation

Eiichi Saito

Tomohiro Asamura

Seiji Watanabe

Daiki Fukui

Daisuke Nakazawa

Takahide Hirai

Yusuke Chikada

Takeshi Okano

Yasuo Inoue

Takeya Meguro

Sadaaki Nakaoka

Michihiko Takahashi

Shuichi Ohtsuka

Ken Kikuchi

Hideto Mori

Masahiro Ito

Yasuo Aotsuka

Kuniomi Abe

Toyo Osumi

Hidehiko Shidara

There is provided a vibration suppression device of a rope-like body that can use a negative restoring force that amplifies a displacement of a rope-like body of an elevator to prevent the displacement from becoming unstable. A vibration suppression device () includes a first displacement measurement unit, a first displacement amplifier, and a control unit (). The first displacement measurement unit measures a displacement in a lateral direction of the rope-like body due to vibration about an equilibrium position () at a first position (P) in a longitudinal direction of the rope-like body. The first displacement amplifier applies, to the rope-like body, a negative restoring force that amplifies the displacement of the rope-like body. The control unit () causes the first displacement amplifier to apply a negative restoring force smaller than a positive restoring force, based on the displacement measured by the first displacement measurement unit.

Vibration suppression device for rope-like body of elevator

A vibration damping device for reducing vibration of an elevator rope includes a displacement amplifier arranged around a region from a first portion of the elevator rope drawn and a second portion of the elevator rope drawn from an opposite side of one or more sheaves in parallel with the first portion. The displacement amplifier is configured to amplify a displacement of each of the first portion and the second portion of the elevator rope. The device also includes a limiting member that controls displacement amplification performed by the displacement amplifier such that the displacement of the first portion or the second portion amplified by the displacement amplifier does not become greater than a first displacement, which is a displacement of the elevator rope by which the elevator rope is not allowed to return to an equilibrium position of the vibration.

Vibration damping device and elevator apparatus

An object of the present invention is to provide a vibration damping device including an instability preventing means, for efficiently suppressing amplification of vibration of a long structure, which is mechanically flexible, due to a resonance phenomenon. A vibration damping device () for reducing vibration of a long structure () includes a displacement amplifier () and limiting members (). The displacement amplifier () is arranged along a given position in the longitudinal direction of the structure (). The displacement amplifier () amplifies a displacement of the structure (). The limiting members () control displacement amplification performed by the displacement amplifier () such that the displacement of the structure () amplified by the displacement amplifier () does not become greater than a first displacement, the first displacement being a displacement of the structure () by which the structure () is not allowed to return to the equilibrium position of the vibration.

An object of the present invention is to provide a sway amount estimation system that can suppress a reduction in user convenience that would occur if the operation method is switched more than necessary. A sway amount estimation system () includes a sensing unit (), a judgment unit (), and an estimation unit (). The estimation unit () calculates an estimated value of the amount of sway of an elevator rope due to vibration caused by building sway based on the sway sensed by the sensing unit () and an estimation model incorporating the effect of the displacement amplification of the displacement amplifier (). The judgment unit () judges if the estimated value calculated by the estimation unit () is greater than a threshold for switching the operation method for the elevator apparatus ().

Sway amount estimation system and elevator apparatus

An object of the invention is to provide a vibration damping system that can avoid the occurrence of resonance of an elevator rope regardless of the vibration frequency of a vibration source. A vibration damping system () includes a displacement amplifier (), a calculation unit (), and a displacement amplification control unit (). The displacement amplifier () is arranged along a given position in the longitudinal direction of the elevator rope. The displacement amplifier () amplifies a displacement due to vibration of the elevator rope based on a variable amplification factor. The calculation unit () calculates the natural frequency of the elevator rope. The displacement amplification control unit () controls the displacement amplification of the displacement amplifier () based on the natural frequency calculated by the calculation unit () and a preset vibration frequency.

Vibration damping system and elevator apparatus

There is provided a vibration suppression device for a rope-like body of an elevator that can inhibit displacement of the rope-like body from becoming unstable due to amplification of the displacement and can make a movable range of the rope-like body wider. A vibration suppression device () includes a movable unit and a stopper. The movable unit can move in a direction in which a distance from an equilibrium position () of the rope-like body changes. The stopper restricts movement of the movable unit to a position closer than a first distance (d) from the equilibrium position (). The movable unit includes a displacement amplifier and a restriction member. The displacement amplifier is arranged to be directed to a first position (P) of the rope-like body. The displacement amplifier amplifies displacement of the rope-like body. The restriction member inhibits the rope-like body from approaching the displacement amplifier.

A display device is provided that includes an amount of light emission computation portion that computes an amount of light emission based on a video signal that has a linear characteristic, an amount of light emission parameter computation portion that, based on the computed amount of light emission, computes an amount of light emission parameter that corresponds to the amount of light emission for each of one of one pixel and a group of pixels that includes a plurality of the pixels, an amount of light emission parameter accumulation portion that accumulates the amount of light emission parameters in association with the one of the one pixel and the group of pixels, a peak detection portion that detects a peak value among the accumulated amount of light emission parameters that correspond to all of the one of the one pixel and the group of pixels, a coefficient computation portion that, based on the detected peak value, computes a coefficient that adjusts a luminance, and a coefficient multiplying portion that multiplies the video signal by the computed coefficient and outputs the multiplied video signal.

Display device, display device drive method, and computer program

Provided is a display device including a display unit having luminescence elements that individually becomes luminous depending on a current amount. The luminescence elements are arranged in a matrix pattern. The display device includes an adjustment signal generator for generating an adjustment signal for adjusting an effective duty regulating a luminous time per unit time. The luminescence elements are luminous for the luminous time. The display device also includes a luminous time setter for setting the effective duty equal to or lower than an upper limit value provided for the effective duty to be set, according to picture information of an input picture signal, so that a total luminescence amount per unit time is limited, at which amount the luminescence elements of the display unit are luminous. The display device further include an upper limit value setter for changing the upper limit value of the luminous time setter, depending on the adjustment signal output from the adjustment signal generator based on an operation.

Display device, picture signal processing method, and program

A microfilm duplicating apparatus for duplicating images, recorded on a master film onto a photographic duplicate film, comprising a light source for illuminating any one of the images on the master film from rear, a single reflective mirror for reflecting a luminous flux, which has been emitted from the light source and passed through the master film while carrying the image to be duplicated, so as to travel towards the duplicate film, and an image forming lens assembly consisting of two facing lenses of equal focal length disposed on the path of travel of the luminous flux.

Microfilm duplicating apparatus

An electrophotographic camera processor-reader in which the function of recording of picture image data on an electrophotographic film and the function of enlargement projection of picture image data recorded on the electrophotographic film can be changed over as required. One lens having both the function of focusing picture image data carried by an original onto the electrophotographic film, and the function of projecting picture image data recorded on the electrophotographic film onto an opaque screen is provided in combination with a combined screen and original-supporting plate, so as to simplify the structure of and reduce the size of the apparatus.

Electrophotographic camera processor-reader

Disclosed is a film cassette of a kind which contains an electrophotographic film therein and which is adapted to be loaded in an electrophotographic camera processor-reader. The film cassette includes a cassette casing formed with a reflecting-mirror insertion cavity into which a reflecting mirror is inserted in inclined relation for reflecting light emitted from a projecting light source to direct the light toward a projecting lens. Because of no necessity for incorporation of the elements including the projecting light source and reflecting mirror in the cassette casing, the size and weight of the film cassette itself can be reduced.

Film cassette for electrophotographic camera processor-reader

An electrophotographic reversal-developing apparatus according to this invention comprises first means for determining the temperature and humidity of the surroundings in which an electrophotosensitive material is put; and second means responsive to the so determined temperature and humidity of the surroundings for controlling a biase voltage to be applied to a one-component toner, thereby preventing any fog from appearing in a reversal-developed photographic image.

Electrophotographic reversal developing apparatus with control of

A film support member having a rectangular aperture is provided in contact with the surface of a film to be dried. A compressed air supply device is provided to supply air along the surface of the film from one edge of the reactangular aperture of the film support member. The edge of the aperture is tapered at an angle of 45.degree. or less to guide the air from the air supply device along the surface of the film to have the air uniformly distributed over the film.

Growing community of inventors

Tokyo, Japan

Eiichi Saito