Futaba Denshi Kogyo K.k.

Futaba Corporation

Other

Nikon Corporation

Kinya Ueda

Yukihiko Shimizu

Masao Saito

Yoichi Kobori

Satoshi Yamaguchi

Yoshijiro Ushio

Takehiko Ueda

Shigetaka Nakamura

Hiroshi Yamaguchi

Hiromichi Morishima

Toshiaki Nakahara

Masahiro Furuta

Masahiro Nakayama

Kazushige Noguchi

Toshihiro Yamasaki

In an electron tube including vibration absorbers for linear members such as filaments, a vibration absorbing means that is made of a vibration absorber with a large vibration absorption effect, has a simple configuration, and is attachable easily to filaments is provided. The vibration absorbing means is formed of a holder, a vibration absorber, and a getter shielding member. These three members are attached to a shielding electrode S overlying the front substrateto dispose the vibration absorberbetween the holderand getter shielding member. The vibration absorberis mounted to slide or rotate between the holderand the getter shielding member. The vibration absorberhas an aperturein which the filament is engaged. The bottom (apex) of the apertureis formed eccentrically. The vibration absorberis in line contact with the shielding electrode S, as shown in FIG.().

Electron tubes

A fluorescent print head driving method is provided wherein an operational lifetime is improved by reducing the evaporation amount of Ba contained in an electron emitter material of a filament cathode and suppressing the deterioration of the luminous efficiency. In the pre-luminous period T during which luminous dots glow before forming an image on a recording medium, a grid voltage is controlled to be a predetermined voltage of a rated value or less and a filament voltage is controlled to a predetermined voltage of a rated value or less. In the print luminous period T during which luminous dots glow before forming an image on a recording medium, a grid voltage blank period is created corresponding to a luminous blank period between glow states during which an anode voltage is written for one line on the recording medium. The anode voltage and the grid voltage are controlled to be a rated voltage with a duty ratio corresponding to a blank period. Thus, the filament voltage is controlled to be a predetermined voltage of a rated value or less.

Method of driving fluorescent print head and image forming apparatus

A fluorescent luminous device which is capable of eliminating arrangement of independently controllable control electrodes and a power supply for applying a negative potential to the control electrodes. A plurality of anode chains and a plurality of filamentary cathodes are arranged in a manner to correspond to each other. A potential across the cathodes is changed over between a zero or negative potential and a positive potential to control the anode dots.

Fluorescent luminous device including cathodes that receive independently controlled voltages

A printer head capable of increasing intensity of dot-like light irradiated onto a record medium without requiring to increase a drive voltage or the number of printer heads arranged. The optical printer head includes a luminous element including two luminous dot arrays arranged in parallel to each other at a predetermined interval in a sub-scanning direction. The luminous dot arrays each are constituted of a plurality of luminous dots which have a dimension in the sub-scanning direction increased by a predetermined magnification as compared with that in a main scanning direction and are spaced from each other at identical intervals in the main scanning direction. The luminous dots of the two luminous dot arrays are arranged in an offset manner while being deviated from each other in the main scanning direction by a distance equal to the dimension thereof in the main scanning direction. Also, a reduction optical system is arranged for carrying out irradiation of light emitted from the luminous dots while reducing a dimension of the light in the sub-scanning direction by a reciprocal of the predetermined magnification.

Optical printer head and optical printer

A photographic recording apparatus capable of being small-sized and simplified in structure and reducing color aberration of an optical system. A refractive index distribution type lens array has a central axis arranged perpendicularly to a light emission direction of a fluorescent luminous tube. Light emitted from the fluorescent luminous tube passes through red (R), green (G) and blue (B) color filters, is incident on the lens array, is reflected on a first mirror and then is guided to a color film, resulting in forming an image on the color film. The fluorescent luminous tube is driven depending on data on R, G and B colors and the whole apparatus is moved with respect to the color film. The color filters are changed over and scan of the color film is carried out three times, so that an image of R, G and B colors may be formed on the color film.

Photographic recording apparatus

A fluorescent printer head capable of being subject to dynamic driving to reduce the number of ICs required. A shield electrode is provided between anode arrays having anode dots arranged in an offset manner and control electrodes are respectively arranged for the anode arrays. The anode arrays are subject to dynamic driving and selected by the control electrodes. Such construction of the fluorescent printer head ensures smooth selection of the anode arrays during the dynamic driving. Also, it eliminates non-uniformity in luminance of the anode dots of the anode arrays and accomplishes downsizing of the printer head and a reduction in manufacturing cost thereof due to a reduction in the number of ICs required.

Fluorescent printer head

Field-emitted electrons are converged by a structure according to the present invention in which odd order gate lines are connected to a first gate lead electrode, while even order gate lines are connected to a second gate lead electrode. When the first gate lead electrode is selected and operated, the potential of the second gate lead electrode is made to be a low level. Since the odd order gate line is disposed between low level even order gate lines, emitted electrons can be converged. When the second gate lead electrode is selected and operated, a contrary process is performed so that emitted electrons are converged. Each gate line has three dot-like field emission arrays, which correspond to red, green and blue color components, so that color image apparatus is structured.

Field emission print head

An optical write element is adapted to be used in an image writing device to form a visual or latent image on a recording medium. The optical write element comprises a rectangular casing having an interior maintained in a high vacuum condition, at least one light-emitting dot array composed of multiple fluorescent light-emitting dots attached along the length of a substrate as part of the casing, at least one cathode placed above the light-emitting dot array, and a pair of shielding members placed over the outside of the light-emitting dot array.

Growing community of inventors

Mobara, Japan

Kinya Ueda