Brother Kogyo Kabushiki-kaisha

Takahiro Ikeno

Hidenobu Kondo

Kyoichi Morita

Yoshinori Osakabe

Isao Kubo

Yoichi Susaki

Hideo Ueno

Kazunari Taki

Masashi Suzuki

Hiroshi Koie

Takahiro Hosokawa

Tatsuya Sato

Tetsuya Kato

Hideki Arimoto

Keiichi Nakano

Takashi Ohama

Masatoshi Shiraki

Tomitake Aratachi

Terumasa Ito

Takeshi Kuno

Yasutake Yamaguchi

Koshi Fukazawa

Akihiro Sakakibara

Masaaki Wakizaka

Takahiko Watari

Hirofumi Oguri

Yuji Hori

Tadahiro Kunii

Seiya Sato

Kazushi Shumiya

Shingo Fujiwara

Hidekazu Okada

Jie Zheng

Teruo Deshimaru

Atsushi Maeda

Toshinari Watanabe

Noriko Misumi

Ayako Sakai

Taiki Yamano

Masashi Fujimoto

First, second, and third line reading processing is processing of emitting light of each color to first, second, and third line of an original document in first, second, and third lighting order, respectively, and reading reflection light of the emitted light. A color that is first in the first lighting order, a color that is first in the second lighting order, and a color that is first in the third lighting order are different from each other. A color that is second in the first lighting order, a color that is second in the second lighting order, and a color that is second in the third lighting order is different from each other. A color that is third in the first lighting order, a color that is third in the second lighting order, and a color that is third in the third lighting order is different from each other.

Image scanner

An image scanner is configured to: while changing a reading position by a position changer and sequentially emitting light of each of three colors in a turn-on sequence from a light source to a document, control a line sensor to read reflection light of emitted light, thereby acquiring gradation image data including gradation values of three colors for each pixel in one line; determine whether a top color shift occurs in the gradation image data at a determination position; in response to determining that the top color shift occurs at the determination position, replace gradation image data at the determination position with black image data; determine whether a bottom color shift occurs in the gradation image data at the determination position; and in response to determining that the bottom color shift occurs at the determination position, replace gradation image data at the determination position with white image data.

An image scanner has an operation clock generator, a photoelectric converter, an AD converter configured to convert the analog pixel signals serially output by the photoelectric converter to digital pixel data by sampling the analog pixel signals in accordance with an operation clock generated by the operation clock generator, a data generator configured to generate read image data representing an read image of the original based on the pixel data converted by the AD converter, a resolution setter configured to set a reading resolution in the sub scanning direction, and a line period determiner configured to determine the line period to be (integer+decimal value) times a modulation period based on the reading resolution set by the resolution setter, the modulation period being inversion of the modulation frequency. The integer is greater than one and the decimal value is determined based on the reading resolution.

Image scanner and line period determining method for image scanner

An image scanner includes a transparent plate, a scanning device, a driving device, a positioning member, a light absorbing portion and a white reference portion. The transparent plate has an original placing surface. The scanning device irradiates an original with light by means of a light source and scans reflected light from the original. The driving device reciprocates the scanning device along the transparent plate. The positioning member positions the original placed on the original placing surface of the transparent plate. The light absorbing portion, which is disposed on the original placing surface side of the positioning member and at substantially a central portion of the positioning member in moving directions of the scanning device, absorbs ambient light entering to the original placing surface side of the positioning member through the transparent plate. The white reference portion is provided to the original placing surface side of the positioning member.

Image scanner with dividing member

An image scanning apparatus, comprising: a scanning device; a reference member; a correction unit; a controller; and a storage device, the scanning device comprising light receiving elements and a lens array, wherein the controller executes: a preparation process and an executive process, the preparation process comprising: a white reference data obtaining process to obtain white reference data by scanning a white reference original; and a white storing process to obtain white basic data by averaging the white reference data of a particular number of adjoining light receiving elements, wherein the executive process comprises: a reference member data obtaining process to obtain reference member data by scanning the reference member; a lens fluctuation calculation process to calculate fluctuation data of the correction data based on the reference member data; and a correction data generation process to generate the correction data by adding the fluctuation data to the white basic data.

Image scanning apparatus and method implemented in the same

An image forming apparatus may includes a central processing device, a first switching regulator and a second switching regulator. The central processing device may perform information processing associated with image formation. The first switching regulator may receive an input of a first voltage and output a second voltage which is lower than the first voltage. The second switching regulator may receive an input of the second voltage and output a third voltage which is lower than the second voltage. The third voltage may be input to the central processing device. A first switching frequency which is a switching frequency of the first switching regulator may be lower than a second switching frequency which is a switching frequency of the second switching regulator.

Image forming apparatus

An image reading apparatus includes: a reading unit having a plurality of photoelectric conversion elements arranged in a main scanning direction; a white reference plate arranged to face the reading unit; a motor configured to move at least one of an original and the reading unit relative to each other; and a controller configured to: control the reading unit to read the white reference plate to obtain white reference data; determine, based on a driving velocity of the motor, whether relative position between the original and the reading unit has changed by a predetermined distance; and output a displacement signal in a case of determining that the relative position between the original and the reading unit has changed by the predetermined distance.

Image reading apparatus with adjustable read timing

A controller is configured to set a reference gradation value when a gray reference member is illuminated. When the number of pixels, of which the gradation values is equal to or greater than the reference gradation value, is a target number of pixels, both are stored in association with each other. A correction target number which is a minimum target number of pixels from among a plurality of target numbers of pixels respectively providing differences, which is less than a predetermined value, between the reference gradation values stored in association with an M-th target number and an (M+1)-th target number. The controller further determines an anomaly pixel number which is the number of anomaly pixels having gradation values which are equal to or greater than a base gradation value. The gradation values of the determined number of anomaly pixels are corrected.

Image scanning apparatus

An image forming apparatus may be configured to enter a first state where electric power is supplied from a power supply and a second state where no electric power is supplied from the power supply. A capacitor may be connected to the power supply, and may be charged by the power supply in the first state. A controller may be connected to the capacitor, and may operate with electric power supplied from the capacitor in the second state. The controller may operate with electric power supplied from the power supply in the first state. The controller may cause the image forming apparatus to enter the first state upon detecting that the image forming apparatus is in a predetermined state. The controller may acquire the related information and may cause the image forming apparatus to enter the second state.

Image scanner and image scanning method

An image reading apparatus includes: a reading unit which reads an original as an object to be read in a main scanning direction every time a command signal is inputted; a command unit which inputs the command signal to the reading unit; a conveying unit which conveys at least one of the original and the reading unit so as to change a relative position between the reading unit and the original in a sub scanning direction; a signal output unit which outputs a displacement signal every time the relative position is changed by a predetermined amount; and a control unit which controls the command unit. The command unit which operates in a first mode to output the command signal to the reading unit at a predetermined time interval and in a second mode to output the command signal to the reading unit at a timing synchronized with the displacement signal.

Image reading apparatus

An image reading apparatus includes: a command unit which generates a command signal periodically; a reading unit which reads an original in accordance with the command signal every time the command signal is generated; a conveying unit which conveys at least one of the reading unit and the original so as to change a relative position between the reading unit and the original; a signal output unit which outputs a displacement signal every time the relative position is changed by a predetermined amount corresponding to a reading interval; and a control unit which controls a generation timing of the command signal by the command unit. A generation period of the command signal is less than an output time interval of the displacement signal.

A liquid ejecting device has a liquid ejecting head to eject ink to a sheet-like object, a carriage mounting the liquid ejecting head, a conveying device which conveys the sheet-like object with holding the sheet-like object to have a corrugated shape having a corrugated cross-section in the scanning direction, a detecting unit which detects an end portion of the sheet-like object in the scanning direction, and a processor. The processor is configured to execute instructions to provide an ejection timing determining unit configured to determine an ejection timing at which the liquid is ejected from the liquid ejecting head in accordance with positional information representing the end portion detected by the detecting unit and reference information, and an ejection control unit configured to control the liquid ejecting head and the carriage to eject the liquid from the liquid ejecting head at the timing determined by the ejection timing determining unit.

Liquid ejecting device, liquid ejecting method and recording medium storing programs for liquid ejecting device

Growing community of inventors

Seto, Japan

Takahiro Ikeno