Canon Kabushiki Kaisha

Eiji Yamaguchi

Masakuni Yamamoto

Hiroaki Hoshi

Susumu Matsumura

Hidetoshi Suzuki

Yasuyuki Todokoro

Noritake Suzuki

Hideki Morishima

Toshihiko Takeda

Yoshiyuki Osada

Aoji Isono

Hiroaki Toshima

Takeo Ono

Mitsutoshi Hasegawa

Hideaki Mitsutake

Toshihiko Miyazaki

Shuji Yamada

Ichiro Nomura

Hisaaki Kawade

Kiyonobu Endo

Koyo Hasegawa

Ichiro Iida

Tetsuya Kaneko

Tatsuya Iwasaki

Masato Yamanobe

Masataka Yamashita

Yasue Sato

Akihiko Yamano

Akira Fujii

Shinya Mishina

Sotomitsu Ikeda

Naoto Nakamura

Yasuhiro Hamamoto

Katsuhiko Shinjo

Yuji Kasanuki

Masahiro Okuda

Shigeto Kanda

Machiko Matsushita

Susumi Matsumura

An image formation apparatus comprising a rear plate on which a plurality of wires for connecting electron emission devices are placed; a faceplate arranged in parallel to the rear plate in a frame, on which an image formation material for forming images by radiation of electrons emitted from the electron emission devices is placed; spacers placed between the rear plate and the faceplate and placed on the wires of the rear plate; and getters provided on the wires on which a spacer is not placed but not provided on the wires on which the spacer is placed.

Image formation apparatus having getters spacers and wires

An image formation apparatus is disclosed which includes, within an enclosure configured by a pair of substrates placed face to face and an external frame placed between the substrates, an electron source placed on one of the pair of substrates, an image formation material placed on the other substrate, and spacers placed between the substrates, characterized in that the spacers and the external frame is conductive and device is provided for electrically connecting the spacers and the external frame so that the equipotential surfaces between the spacers and the external frame are quasi-parallel when driven.

Image formation apparatus having fluorescent material and black material

A method of measuring luminance of an image display apparatus, a method of manufacturing the same, and a method and an apparatus for adjusting characteristics of the same, in which accuracy of measurement is improved while reducing time for measuring luminance of a pixel are provided. A plurality of devices that are not adjacent to each other (for example the devices of the same color out of R, G, and B) are selected and illuminated simultaneously, and luminance is measured for each of them. Based on measured luminance, the electron-emitting characteristics of the respective electron-emitting device as are adjusted based on measured luminance.

Method of measuring luminance of image display apparatus, method of manufacturing the same, method and apparatus for adjusting characteristics of the same

Image formation apparatus having electrically conductive spacer and external frame

Image formation apparatus

It is an object of this invention to provide an electron generating apparatus which eliminates, with a simple process, variations in electron-emitting characteristics of electron sources caused by various factors, a method of adjusting the characteristics of the electron generating apparatus, a method of manufacturing the electron generating apparatus, and an image forming apparatus using the electron generating apparatus. Characteristic measuring voltages are applied from pulse generators ( ) to each surface-conduction emission device of a display panel ( ), so that the electron-emitting characteristics are measured by a current detector ( ). A pulse peak value setting circuit ( ) is controlled to output a voltage signal having a peak value determined in the above manner, and characteristic shift voltages are applied from the pulse generators ( ) to the surface-conduction emission device. With this process, the electron-emitting characteristics of the surface-conduction emission devices are equalized. The characteristic shift voltage is higher than the characteristic measuring voltage, and the characteristic measuring voltage is higher than a driving voltage.

Electron generating apparatus, image forming apparatus, method of manufacturing the same and method of adjusting characteristics thereof

When manufacturing an electron-beam source, an activation is performed. To generate activation material at a plurality of electron-emitting devices; by dividing the plurality of electron-emitting devices into plural groups and sequentially applying voltage to each group.

Method of manufacturing electron-beam source and image forming apparatus using same, and activation processing method

When manufacturing an electron-beam source, an activation is performed to generate activation material at a plurality of electron-emitting devices. The activation is generated by dividing the plurality of electron-emitting devices into plural groups and sequentially applying voltage to each group.

An apparatus for driving an electron emission element driven by two different potentials applied thereto includes a scanning drive circuit for applying a first potential to the electron emission element, a modulating drive circuit for applying a second potential to the electron emission element, and a timing control circuit for providing a delay time following application of the first potential in order to delay application of the second potential. The delay time is set to be longer than a time required for the damping of a ringing waveform, which is produced by application of the first potential, to 1% of the applied voltage. This makes it possible to reduce the effects of the ringing phenomenon.

Apparatus for and method of driving elements, apparatus for and method of driving electron source, and image forming apparatus

It is an object of the invention to provide an image forming apparatus capable of easily obtaining a white balance and performing image display with excellent color reproduction properties, and a method of manufacturing and adjusting the image forming apparatus. A plurality of surface conduction electron-emitting devices (,) are arranged on a substrate (,). Light emission is performed in accordance with the colors (R, G, and B) of phosphors applied to a phosphor film (,) upon electron emission from the devices, so that an image is formed. The electron-emitting characteristics of the surface conduction electron-emitting devices (,) are shifted in advance in correspondence with corresponding phosphor colors. Therefore, a satisfactory white balance of light emission of the R, G, and B phosphors can be obtained.

Image forming apparatus and method of manufacturing and adjusting the same

This invention relates to an electron source and an image forming apparatus each of which particularly comprises a surface conduction type electron emitting element as an electron emitting element, a method of manufacturing an electron source and an image forming apparatus, in which the energization forming treatment step of the surface conduction type electron emitting element is performed by applying a voltage to an electron emitting portion formation thin film via a nonlinear element connected in series with the thin film and having nonlinear voltage/current characteristics, an electron source and an image forming apparatus in each of which the nonlinear element is connected in series with the surface conduction type electron emitting element, and a method of driving the same.

Method of manufacturing electron source or image forming apparatus using

It is an object of this invention to provide an electron generating apparatus which is hardly influenced by variations in driving voltage, an image forming apparatus using the electron generating apparatus, and a method of manufacturing and adjusting the same. The row wiring layers of a multi-electron-beam source (300) are sequentially selectively switched by a control circuit (302) and applied with a pulse voltage having a value about 1.05 to 1.5 times the maximum value of a normal driving voltage from a DC voltage source (301). The characteristics of all surface conduction electron-emitting devices of the multi-electron-beam source (300) are shifted to the high potential side. With this process, even when the driving voltage becomes high due to superposition of noise and the driving voltage, variations in electron-emitting characteristics caused by the voltage shift characteristics of the surface conduction electron-emitting devices can be prevented.

Electron generating apparatus, image forming apparatus, and method of

Electron source, image forming apparatus using the same, method of

In a magnetooptical information recording-reproducing apparatus, recording of information is performed such that a laser beam is irradiated on a magnetooptical information recording medium via an optical head while applying a magnetic field to the beam irradiated portion of the recording medium onto which information pits are formed by utilizing the difference in the direction of magnetization thereof. The magnetooptical information recording-reproducing apparatus is provided with a band-like shielding plate which is arranged in an optical path of a reflected light from the recording medium upon application of the laser beam thereto in a direction perpendicular to tracks of the recording medium. Reproduction of information recorded on the recording medium is effected by detecting the beam which is not shielded by the shielding plate by use of a photodetector.

Magnetooptical information recording and reproducing apparatus which

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Zama, Japan

Eiji Yamaguchi