Futaba Denshi Kogyo K.k.

Futaba Denshi Kogyo Kabushiki Kaisha

Futaba Corporation

Mikio Yokoyama

Shigeo Itoh

Takeshi Tonegawa

Kiyoshi Morimoto

Hiroshi Watanabe

Kazuhiko Tsuburaya

Yuuich Kogure

Teruo Watanabe

Gentaro Tanaka

Goro Eto

Akira Kadowaki

Yuji Uchida

A vacuum envelope that can improve the vacuum degree in a field emission device is provided. The vacuum envelope includes the cathode side substrate on which field emission elements are formed and the anode substrate spaced by a predetermined distance in the electron emission direction. At least two openings are formed before sealing the vacuum envelope. The remaining gas is ousted from the vacuum envelope by introducing a high temperature gas inside the vacuum envelope for a predetermined period of time. Thereafter, one of the openings is sealed while the envelope is being evacuated to a vacuum state through the remaining openings.

Fed flushed with hot inert gas

A fluorescent display device capable of being sealed while being evacuated to a high vacuum without independently forming any evacuation hole at an electrode formation section of a substrate of an envelope. A cathode substrate is sealedly formed of an electrode formation section of a large plate-like shape provided thereon with a field emission cathode, an evacuation section of a small plate-like shape formed with a cutout, and a seal member. An anode substrate on which a display section is spacedly arranged oppositely to the cathode substrate. A getter chamber including an evacuation tube is connected to the evacuation hole. Thus, the present invention eliminate independent formation of any specific evacuation at the electrode formation section, to thereby prevent damage and contamination of the substrates.

Envelope for vacuum electronic device

A fluorescent display device (1) includes an air tight envelope (2) having a cathode substrate (3), an anode substrate (4) with a phosphor layer arranged to provide a luminous display, a seal member (5), an evacuation hole (9) formed at a side of the envelope (2), and a getter chamber (10) in communication with the hole (9). The getter chamber (10) is disposed on the outside of the envelope (2) and includes a chamber body (12), and an evacuation tube (13). The getter chamber (10) eliminates the independent formation of an evacuation hole in the cathode substrate (3), and thereby prevents damage and contamination of the cathode substrate (3).

Getter chamber for flat panel displays

A method for manufacturing a display device is available that is capable of remarkably improving life characteristics of a display device. A display device placed in a chamber is evacuated to about 10.sup.-7 Torr. Then, reducing gas is introduced into the display device and held therein for several minutes, followed by evacuation of the display device to about 10.sup.-5 Torr. The reducing gas introducing and discharge steps are repeated several times. Thereafter, evacuation of the display device is carried out while keeping the chamber at about 300.degree. C., followed by sealing of the display device.

Method for manufacturing display device

An evacuation apparatus is capable of evacuating an envelope to a high vacuum without evacuating a whole room or chamber to a high vacuum. An evacuation pipe is connected at a distal end thereof to an evacuation head and a vacuum pump is actuated to evacuate an evacuation chamber to a high vacuum, to thereby evacuate an envelope to a high vacuum. Then, a motor is driven to rotate ball screws, to thereby upwardly move the envelope mounted on the evacuation head. The evacuation pipe is fused at an intermediate portion thereof by a gas burner, to thereby be sealed. Then, the evacuation pipe is cut to disconnect the envelope from the evacuation head.

Evacuation apparatus

An electron feeder for a flat-type luminous device capable of providing electrons sufficient to ensure the uniform luminance of a whole display section irrespective of a distance from an electron source. A plurality of front electrodes and a plurality of rear electrodes constituting an electron beam guide are arranged separate from one another in the direction of traveling of the electrons, respectively, and the front electrode and rear electrode corresponding to each other constitute each guide electrode section. The so-constructed guide electrode sections are alternately applied thereto two different voltages, resulting in the electron beam guide exhibiting the function of focusing electrons.

Electron feeder for flat-type luminous device

An electron feed structure for a flat-type luminous device capable of permitting electron emitted from an electrons source to be uniformly fed throughout a display section. The electron feed structure includes an electron flow guide constituted by an inner guide electrode of a high voltage and an outer guide electrode of a low voltage, so that an electric field of a high voltage and that of a low voltage may be alternately formed to form electrostatic lenses in the guide, to thereby effectively prevent the function of the electron flow guide from being deteriorated. A guide voltage applied to each of the electrode segments of the inner guide electrode is rendered constant and a guide voltage applied to each of the electrode segments of the outer guide electrode is likewise rendered constant, to thereby cause the correlation between the guide voltage and a deflection voltage applied to the electron flow guide to be uniform irrespective of a position within the electron flow guide, resulting in electrons emitted from the electron source being drawn out under the same conditions.

Electron feed structure for flat-type luminous device

A casing for a display device of the tipless type is disclosed which is capable of being readily manufactured, and allowing a display device to have a good space factor and exhibit excellent display characteristics. The casing comprises a casing body formed with an evacuation hole and a planar plate lid member arranged to sealingly close the evacuation hole by means of a sealer when the casing is evacuated.

Casing for display device

A process for making a fluorescent display device capable of accomplishing the mass production of a tipless fluorescent display device with good reliability and productivity is disclosed. The process is adapted to carry out, in a single chamber, a step of hermetically bonding an anode substrate and a casing together to form a hermetic envelope and a step of sealing the envelope in vacua.

Process for making fluorescent display device

A casing for a display device of the tipless type is disclosed which is capable of being readily manufactured, and allowing a display device to have a good space factor and exhibit excellent display characteristics. The casing comprises a casing body formed with an evacuation hole and a plate lid member arranged to sealingly close the evacuation hole by means of an oxide solder layer when the casing is evacuated.

Growing community of inventors

Mobara, Japan

Mikio Yokoyama