Canon Kabushiki Kaisha

Noritake Suzuki

Hidetoshi Suzuki

Eiji Yamaguchi

Toshihiko Takeda

Yoshiyuki Osada

Aoji Isono

Hiroaki Toshima

Yasuyuki Todokoro

Takahiro Oguchi

Ichiro Nomura

Hisaaki Kawade

Akihiko Yamano

Akira Asai

Tetsuya Kaneko

Tatsuya Iwasaki

Hideaki Mitsutake

Kunihiro Sakai

Takashi Iwaki

Masato Yamanobe

Yasue Sato

Masaaki Iwane

Shinya Mishina

Kazuya Miyazaki

Takeo Ono

Tamaki Kobayashi

Naoto Nakamura

Yasuhiro Hamamoto

Kohei Inamura

Katsuhiko Shinjo

Hironobu Mizuno

Izumi Kanai

Yuji Kasanuki

Masahiro Okuda

Mitsutoshi Kuno

Koki Nukanobu

Shigeki Yabu

An image forming apparatus comprising: a cathode; a gate; an anode; an electron emitting element arranged on the cathode; an image forming member that is arranged opposite to the electron emitting element; a deflection electrode that deflects the orbit of the electron emitted from the electron emitting element and headed toward the anode; and a driver, wherein assuming that an electric field required to start electron emission from the electron emitting element is Ee, that an electric field applied to the electron emitting element by applying voltage to the anode is Ea and that an electric field applied to the electron emitting element by applying voltage to the gate is Eg, the driver applies voltages to the cathode, the gate, and the anode in such a way that (i) Ea&#x3e;Ee or (ii) Ea+Eg&#x3e;Ee and Ea&#x3e;Eg is satisfied.

Image forming apparatus and method for driving and controlling the same

In a process of reducing a resistivity of a polymer film for carbonization in a surface conduction electron-emitting device, by irradiating an energy beam onto the polymer film, when an energy intensity of the beam given in a unit area in a unit time is assumed to be W W/m, W satisfies a formula W&#x2267;2&#xd7;T&#xd7;(&#x3c1;&#xb7;C&#xb7;&#x3bb;/&#x3c4;), where T is defined as a temperature &#xb0; C. at which the polymer film is heated for one hour in a vacuum degree of 1&#xd7;10Pa to reduce a resistivity of the polymer film to 0.1 &#x3a9;&#xb7;cm, Cis a specific heat J/kg&#xb7;K of the substrate, &#x3c1;is a specific gravity kg/mof the substrate, &#x3bb;is a heat conductivity W/m&#xb7;K of the substrate, and &#x3c4; is an irradiation time in the range of 10sec to 10 sec.

Methods of manufacturing electron-emitting device, electron source, and image display apparatus

Method and apparatus of manufacturing electron source, and adjusting method of the electron source, and method of manufacturing an image forming apparatus having the electron source

An electron is source formed by a plurality of electron-emitting devices provided on a substrate and connected by a wiring. Use of an electron ray manufacturing apparatus having electrical connecting means connected to the wiring at three or more points can uniformize characteristics of a plurality of the electron-emitting devices.

Apparatus and method for manufacturing electron source, and method of manufacturing image-forming apparatus

An electron-beam generating device, in which a number of cold cathode elements are matrix-wired, as well as a method of driving the device, is applied to an image forming apparatus. Statistical calculations are performed in advance with regard to a required electron-beam output, and loss produced in the matrix wiring is analyzed. Drive signals are corrected by deciding optimum correction values based upon the analytical results. As a result, when rows of the matrix are driven successively row by row, the intensity of the outputted electron beams can made accurate for any driving pattern.

Electron-beam generating device having plurality of cold cathode elements, method of driving said device and image forming apparatus applying same

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

This invention discloses an electron source manufacturing method including the step of applying a voltage to a plurality of conductive members by applying a potential to first portions of the plurality of conductive members serving as at least part of electron-emitting devices via a wiring commonly connected to the plurality of conductive members, and applying a potential to second portions of the plurality of conductive members, wherein the potential applied to the second portions of the plurality of conductive members is set to relax the difference in voltage applied to the plurality of conductive members owing to the difference between potentials at portions respectively connected to the first portions of the plurality of conductive members in the wiring commonly connected to the plurality of conductive members.

Method and apparatus for manufacturing electron source, and method manufacturing image forming apparatus

A method and apparatus for driving an electron source in which a high-quality image display is presented by correcting a non-uniform effective current distribution caused in cold cathode elements by leakage current. A digital video signal enters a shift register where a serial-to-parallel conversion is made for each line of an image based upon a shift clock signal. One line of the image data that has been subjected to the serial-to-parallel conversion is latched in a latch circuit and then applied to a voltage modulating circuit. The latter voltage-modulates the input data and sends the modulated signal to a voltage/current converting circuit. The latter converts the voltage quantity to a current quantity, which is applied to each of the cold cathode elements of a display panel through respective column terminals. A voltage V is applied to the selected row wire, and a voltage V (V &ne;V ) is applied to all other row wires, for controlling the leakage current.

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 emission current (Ie,) emitted by the electron-emitting device and/or a device current (If,) flowing through the electron-emitting device are measured when a voltage (V,) is applied to the electron-emitting device and an emission current (Ie,) emitted by the electron-emitting device and/or a device current (If,) flowing through the electron-emitting device are measured when the voltage (V,) is applied to the electron-emitting device after the measurement step. A voltage (V,) higher than the voltage (V,) is applied to the electron-emitting device when the emission current (Ie,) is larger than the emission current (Ie,) and/or the device current (If,) is larger than the device current (If,).

Method of driving electron-emitting device, method of driving electron source using the electron-emitting device, and method of driving image forming apparatus using the electron source

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

In an image display apparatus including a multi-electron beam source having a plurality of electron-emitting devices (51) wired in a matrix using a plurality of column wiring layers and a plurality of row wiring layers, and a plurality of phosphors which are excited to emit light upon irradiation of electron beams, a delta arrangement of phosphors is realized with the simple arrangement of the multi-electron beam source. The column and row wiring layers are straight layers, the plurality of phosphors (R, G, and B) are arranged in a delta arrangement, and the multi-electron beam source is adjusted such that a plurality of electron beams emitted therefrom reach the phosphors. For this reason, the directions of electrons emitted from the devices on an odd ((2p-1)th) row and an even (2pth) row along orbits are reversed.

Image display apparatus

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

An electron-beam generating device and a method of driving same, in which a number of cold cathode elements are matrix-wired, is applied to an image forming apparatus. Statistical calculations are performed in advance with regard to a required electron-beam output, and loss produced in the matrix wiring is analyzed. Drive signals are corrected by deciding optimum correction values based upon the analytical results. As a result, when rows of the matrix are driven successively row by row, the intensity of the outputted electron beams can made accurate for any driving pattern.

Electron-beam generating device having plurality of cold cathode

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Atsugi, Japan

Noritake Suzuki