Hitachi, Ltd.

Other

Hitachi Koki Co., Ltd.

Nippon Telegraph & Telephone Hitachi Ltd & Public Corporation

Kunio Sato

Shinya Kobayashi

Masaharu Tadauchi

Kiyohiko Tanno

Susumu Saito

Yasuo Inoue

Seiji Maruo

Hiroshi Suehiro

Akira Arimoto

Yuji Suzuki

Tatsuki Inuzuka

Yasuyuki Kojima

Nobuyoshi Hoshi

Yasuro Hori

Teruhiko Minegishi

Yasuyuki Kozima

Yasuo Kikuchi

Shinichi Nakatsuka

Hideo Hirane

Yuji Kudo

Kazumi Komiya

Kenkichi Sato

Akira Yamamoto

Susumu Akimaru

Masaya Nishida

Katsuhiro Ono

Toshihiko Hanai

Minoru Kanzaki

Kazuo Muneoka

Akio Koga

Asahiko Kikuchi

Chokichi Sato

Hisaharu Ohki

A water vapor plasma generating apparatus which is able to generate water vapor plasma stably is provided. By applying the water vapor plasma generated by the apparatus to an object to be treated, a sterilization and disinfection treatment can be performed. In addition, by applying the water vapor plasma generated by the apparatus to a substance containing an oily ingredient, an antioxidative treatment can be performed.

Water vapor plasma generating apparatus, sterilization and disinfection method, and method for antioxidative treatment using water vapor plasma

A rotary valve assembly for controlling flow passing through substantially parallel passages, is disclosed. A wall has a cylindrical bore extending transverse to the passages. An elongated rotor is rotatably supported at opposed ends thereof within the cylindrical bore. A plurality of axially spaced valves are disposed on the rotor so as to open and close the passages. A plurality of wall portions are disposed between the valves so as to isolate the adjacent passages. A C-ring is disposed on the respective wall portion of the rotor in sealing contact with the wall surface surrounding the cylindrical bore. An O-ring is disposed axially adjacent to the C-ring and adapted for reducing radial vibration of the rotor and cooperating with the C-ring to prevent leakage flow through the adjacent passages.

Rotary valve assembly and engine induction system using the rotary valve assembly

A disc cartridge which includes a dust-proofing mechanism having a dust-proofing panel, a dust-proofing arm and a dust-proofing plate which are arranged facing the major surface, bottom surface and both lateral surfaces of the disc cartridge loaded in position to prohibit intrusion of dust and dirt into the inside of the device via a cartridge insertion and/or removal opening. The disc cartridge includes a main cartridge body unit having a detection hole for detecting a second disc housed in the disc cartridge on insertion of a detection switch provided on the device. The detection hole is formed so that its one end in the depth-wise direction is closed. The detection hole is formed to a depth such that an actuator of the detection switch is not abutted on the hole bottom. This prohibits dust and dirt from being intruded into the main body unit of the disc drive device.

Disc cartridge and dust-proofing system in disc drive system

In order to realize edge smoothing in an image printing apparatus using a plurality of laser beams, commonality of a data processing circuit to the plurality of laser beams is attained by obtaining image data for the plurality of scanning lines in synchronism with a common scanning position of one of the plurality of laser beams and storing the image data into a common memory and generating laser modulating data for each of the laser beams; temporarily the laser modulating data for the other laser beams into FIFOS; using the laser modulating data in synchronism with the respective scanning positions of the plurality of laser beams to generate laser modulating signals for the respective laser beams in a PWM.

Image printing apparatus using plurality of laser beams

A light beam scanning apparatus in which laser power and spot shape of an emitted laser beam are controlled, has a laser control signal generating part for changing a picture signal to a laser power control signal and a spot shape control signal, a laser power control current generating part which is driven by the laser power control signal, a spot shape control current generating part which is driven by the shape control signal, and a laser beam emission part for emitting a laser beam having a laser power and a spot shape which are controlled by the control signals via a commonly used light wave guiding part, wherein the control signal generating part generates or corrects the control signals based on at least one of the difference between the laser power of a beam to be emitted and a detected laser power, the difference between the spot shape of a beam to be emitted and a detected laser power, a detected temperature at the laser beam emission part, and an effective light emission pixel number.

Light beam scanning apparatus which controls power and spot shape of

An electrophotographic image recording apparatus that forms an electrostatic latent image so that the uniformly charged surface of a photoreceptor is scanned for its exposure with a beam spot of a light beam generated according to image information, to discharge the surface of the photoreceptor up to a medium potential. The electrophotographic image recording apparatus includes a light beam generator capable of varying an amount of light beam and a light intensity distribution pattern of a beam spot on the surface of the photoreceptor, an intensity distribution pattern controller for controlling the light beam generator according to the image information of peripheral pixels, to vary the intensity distribution pattern of the beam spot on the surface of the photoreceptor, and a light beam output controller for controlling the light beam generator to put the exposure energy on pixels, exposed to the beam spots of intensity distribution patterns, at a predetermined value.

Electrophotographic image recording apparatus with photoreceptor

A printer control system for controlling a print characteristic of a printer for printing a print pixel signal synchronized to horizontal lines of an image. The print pixel signal has an arbitrary horizontal resolution and includes white print pixel signals representing white pixels of the image and black print pixel signals representing black pixels of the image. The printer control system controls the print characteristic of the printer in accordance with a type of the image and includes a white enlarged line memory for receiving the print pixel signal and storing the print pixel signal at timing points spaced a predetermined time apart after expanding any portion of any white print pixel signal in the print pixel signal falling between two adjacent ones of the timing points and having a duration less than the predetermined time to have a duration equal to the predetermined time without expanding any portion of any black print pixel signal in the print pixel signal, and a black enlarged line memory for receiving the print pixel signal and storing the print pixel signal at timing points spaced a predetermined time apart after expanding any portion of any black print pixel signal in the print pixel signal falling between two adjacent ones of the timing points and having a duration less than the predetermined time to have a duration equal to the predetermined time without expanding any portion of any white print pixel signal in the print pixel signal.

Printer control system including white enlarged line memory for storing

An image recording apparatus that records a visible image on a recording medium by successively entering image signals forming an image. The apparatus comprises a standard pattern detector detecting standard patterns from the input image signals, image density measuring device measuring density of an output signal, image quality judging device judging image quality of every standard pattern output of the image density measuring device, and process controller deciding process parameters on the basis of signals output of the image quality judging device before controlling image quality of the output signal using the process parameters. The apparatus therefore can save the toner and paper and control for high image quality.

Image recording apparatus for controlling image in high quality and

An electronic blackboard having a copy function, and an edit function or communication function. A single reading unit is used in common for both reading an image on a flat board and reading an image or an original document. Reflected light from the flat board and from the original document is converged and projected onto a light receiving surface of a single photoelectric conversion element. An image of the flat board of the original document can be selectively read, or the composite image of both the flat board and original document can be read. Further, the electrical signal corresponding to the image can be modulated and transmitted, and a received electrical signal can be demodulated to reproduce a corresponding image. Furthermore, in accordance with the electrical signal obtained by photoelectrically converting an image, the layout of the image on the flat board can be determined and edited to change the shape of the image.

Electronic blackboard

A recording apparatus comprising an input terminal to which a picture information signal to be recorded is applied, a driver for moving an electrostatic printing medium in a predetermined direction, an apparatus for electrifying the electrostatic printing medium, a thermal printing head for heating the electrostatic printing medium in accordance with the picture information signal to reduce the resistance of the heated regions of the electrostatic printing medium, thereby forming a pattern of resistance-reduced region on the electrostatic printing medium, so that a charge pattern (electrostatic latent image) according to the picture information signal is formed on the surface of the electrostatic printing medium.

Recording apparatus

A/D conversion of a video scan signal having a substantially constant shading profile. Waveform of a blank or white scan signal is decomposed into gently varying component and steeply changing component superposed on the former. These components are detected by separately provided A/D converters. The gently varying component can be detected by a low speed A/D converter. By adopting the level of the gently varying component as a reference level, the steeply changing components can be detected with a reduced number of bits at an improved precision.

Signal processing system and the method

An apparatus for converting an analog input signal to a binary output signal, particularly for use in a facsimile system. The apparatus includes a reference level generator having its input terminal supplied with the analog input signal, a signal dividing circuitry connected between the input and output terminals of the reference level generator, an integrator having one end connected with the dividing output terminal of the signal dividing circuitry and the other end connected with a common potential level point in the apparatus and a comparator having one input terminal connected with the signal dividing output terminal of the dividing circuitry and the other input terminal connected with the input terminal of the reference level generator. The reference level on the basis of which the analog input signal is converted to a binary signal is thus adjusted for satisfactory conversion of the signal.

Apparatus for converting an analog signal to a binary signal

A control circuit is used for matrix drive recording. It includes a microprocessor, a RAM for storing data to be recorded therein, an address signal editing circuit for modifying the input addresses to the RAM, a shift register for converting the data from parallel to serial form and transferring it to a recording circuit, and a DMA controller for reading the data from the RAM and transferring it to the shift register.

Control circuit for matrix-driven recording

Disclosed is an electrostatic recording apparatus comprising a wire electrode row including a multiplicity of wire electrodes which are continuously arranged substantially in a row and are divided into a plurality of wire electrode blocks each having the same number of wire electrodes, a plurality of auxiliary electrodes respectively arranged along the wire electrode row and in opposite to the plurality of wire electrode blocks, a driving circuit for selectively applying driving signals to the wire electrodes and the auxiliary electrodes in response to a recording signal, a humidity detector which detects ambient humidity to produce a signal representing a detected value, and means for controlling a waveform of the drive signal in accordance with the output signal from the humidity detector.

Electrostatic recording apparatus

A plurality of lead electrodes are connected to a strip-like heating resistor in parallel and at regular intervals so as to define a heating resistor section between the adjacent lead electrodes. The heating resistor section is supplied with a current across the lead electrodes connected on both sides thereof. According to this invention, one recording block is constructed of a plurality of such heating resistor sections, and the heating resistor sections are sequentially energized within each recording block. By performing a plurality of such energizing cycles within each recording block, dots corresponding to the respective heating resistor sections are recorded.

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Hitachi, Japan

Kunio Sato