Sharp Kabushiki Kaisha Corporation

Takao Horiuchi

Yoshitaka Okahashi

Shigeru Watase

Kyosuke Taka

Tomohiko Okada

Yukihito Nishio

Hidekazu Sakagami

Jun Morimoto

Takeshi Murakami

Kenji Tanaka

Mitsuharu Yoshimoto

Masanori Matsumoto

Akira Hamada

Nobuo Manabe

Akira Tamagaki

Haruo Nishiyama

Akihiko Taniguchi

Sohichi Takata

Kiyoshi Inoue

Junichi Kajiwara

Koichi Sumida

Kouji Yamaji

Masashi Toyoda

Kohsuke Harada

Kazunobu Takahashi

Toshihiro Horiuchi

Takahisa Sato

Shoichi Fukutome

Yoshiomi Hamano

Hiroki Kai

In an illuminating apparatus including a plurality of rows of light source groups each having a plurality of light-emitting elements for irradiating light to an original that are arranged in a main scanning direction, the light-emitting elements in the plurality of rows of light source groups illuminate an irradiated face of the original at the same pitch within the same light source group and at different pitches from each other among the plurality of rows of light source groups.

Illuminating apparatus, image reading apparatus, and image forming apparatus

A display system has a display device, a display control device, and a laser emitting device. The display device has a display part that displays information on a display screen and a laser detection part having a plurality of optical sensors arranged in the vicinity of the display screen of the display part to detect a laser beam that has reached the display screen. The laser emitting device has an instruction input part that inputs an instruction with respect to the displayed information and a laser output part that outputs the laser beam including output information corresponding to the inputted instruction. The display control device has a position calculation part that calculates a position of the display screen irradiated with the laser beam based on positions of the optical sensors that have detected the laser beam, a received information acquiring part that acquires the output information included in the laser beam detected by the optical sensors and a display control part that controls a display of the information displayed on the display part, based on the position calculated by the position calculation part and the acquired output information.

Display system

An image scanning device includes a CCD pair provided with two rows of photodiode arrays for scanning an image on a paper, a motor drive circuit for causing the CCD pair to sub-scan the image on the paper, and an adder for superimposedly combining two outputs of the CCD pair with a predetermined time lag therebetween. A control unit controls the adder to add the two outputs of the CCD pair without the time lag when received an instruction of a low resolution that corresponds to &#xbd; of a high resolution by a resolution switch and thereby doubles a speed of the sub-scan by the motor drive circuit.

Image scanning device including a combine unit which superimposes conversion results of a plurality of photoelectric converters

A control unit inputs a control signal depending on whether reading at a high resolution is selected or reading at a low resolution is selected in an image reading unit. A first delay circuit and a second delay circuit output image data that is captured by a first CCD line sensor and a second CCD line sensor to an adder after retaining the image data for a time in accordance with the input control signal. The adder generates color image data by adding the image data that is captured by the first CCD line sensor to the image data that is captured by the second CCD line sensor.

Image reading apparatus

Reference images on the respective surfaces of a reference document transported on a transportation path are read out by a first image reading section and a second image reading section, respectively. As a result a first reference readout image and a second reference readout image are acquired. in accordance with the difference between the changes in the sub-scanning direction in the first reference readout image and the changes in the sub-scanning direction in the second reference readout image, the reading cycle of the first image reading section Xand the reading cycle of the second image reading section Xare set. This makes it possible to equalize the magnifications of the respective images on the front and back sides of the document, even if the speeds of the document at the times of passing through readout positions for the front and back sides change over time, on account of the wear of a transportation roller.

Image reading apparatus and image reading method

In the present invention, an administration server stores therein: a user ID and an academic conference book-classification which are associated with each other; and a book ID and a library book-classification which are associated with each other. Further, a copy device includes: a user ID acquiring section for acquiring the user ID; a book ID acquiring section for acquiring the book ID; a first acquiring section for acquiring from the administration server the academic conference book-classification associated with the user ID; a second acquiring section for acquiring, from the administration server, a library book-classification associated with the book ID; and a copy control section for controlling a copying operation to be performed with respect to a book, based on the academic conference book-classification, and the library book-classification.

Centralized copy administration and management system that controls the reproduction of copyright works based on user history and usage permissions associated with the media

A set pattern image with no displacement is recorded onto recording paper. In this set pattern image, the centers of auxiliary patterns are displaced in an auxiliary scan direction off a referential straight line passing through the centers of primary patterns. The image forming apparatus causes the set pattern image to be read, measures the displacements of the auxiliary patterns in the auxiliary scan direction off the referential straight line, and compensates for the displacements, such as by adjusting writing timings in the auxiliary scan direction so that the displacements become zero.

Image forming apparatus

The image forming apparatus includes: an image data input section for reading a document as image data; a target value memory section for storing a target value of an input/output characteristic value when a reference document is read; a comparator for comparing the image data of the reference document and the target value so as to create a new input/output characteristic value; a fixed value memory section for storing a difference in input/output characteristic values as a fixed value between an original document and a copy document; and an adder for adding the fixed value to the image data of the reference document so as to output a resultant value to the comparator. By the provision of the fixed value memory section and the adder, the image forming apparatus can set a plurality of input/output characteristic values by reading the reference document once, thus reducing time for the procedure of setting the respective input/output characteristic values.

Image processing apparatus and method for the fast and accurate calibration of the same using actual and pseudo reference image data

A power supply deviceincluding: a current sourcefor supplying current to a load circuitwhich operates on the supplied current, and a power switch unitbetween the current sourceand the load circuitto control passage of current, wherein: the power switch unitincludes a switching elementconnected in parallel with the open-close element, a power supply controllerincluding an open-close element controllerwhich controls operation of the open-close elementand a switching element controllerwhich controls operation of the switching element, and a voltage detectorwhich detects terminal voltage of the load circuit; and the power switch unitturns on the switching element before supplying current to the load circuit and closes the open-close element when the terminal voltage of the load circuit becomes almost equal to supply voltage.

Power supply device preventing inrush current

A document-image reading device that can analyze a speed fluctuation state of a scanner when scanning an image in the feed direction by separately extracting speed fluctuation components by reading a change in density of reference scale lines and, on the basis of the analysis result, prevents the occurrence of an image blur that may be resulting from unstable factors of a driving mechanism. The document-image reading device for reading a document image data at a specified time-interval given by the reference clock signal, which comprises an image sensor for reading a document image by moving the image sensor or the document in the feed direction and is featured in that the document-image reading device is further provided with a chart reader for reading a reference chart portion having alternations of a high-density division and a low-density division arranged one after another at a distance-interval equal to a least pitch readable by the document-image reading device along the feed direction and a processor for processing image data read from the reference chart portion by using a comb-type filter and by integration.

Document image reading device

The invention produces a document-image reading device that can analyze a speed fluctuation state of a scanner when scanning an image in the feed direction by separately extracting speed fluctuation components by determining a change in density of references scale lines; and, on the basis of the analysis result, prevents the occurrence of an image blur that can result from unstable factors of a driving mechanism of the device. The document-image reading device, which reads document image data at a specified time interval given by a reference clock signal, comprises an image sensor that can read a document image while the document-image reading device or the document moves in the feed direction. Additionally, the document-image reading device includes a chart reader for reading a reference chart portion having alternations of high-density and low-density divisions that are arranged one after another at a distance interval equal to the least pitch readable by the document-image reading device. A processor processes image data read from the reference chart portion by using a comb-type filter and by integration.

Featured is a sheet feed unit including a first transport path in which is transported a first sheet, a second transport path and a protrusion. A second sheet is transported in the second transport path and guided at a prescribed angle relative to the first transport path. The protrusion is located or fixed at a confluence of the first transport path and the second transport path. The protrusion also has a guide surface that is placed to allow the second sheet to be guided along the first transport path.

Sheet feed unit having guide with sheet guide surface placed at confluence of two transport paths

To maintain an image eraser used for erasing a toner image printed on a sheet operable wastes power, and additionally, a manual operation is required for loading a sheet feed portion with sheets from which the printed image is removed for reuse. The main body of an image forming apparatus is provided with a tray for image erasure and a feed roller for feeding sheets from the tray. Disposed in a passage for transporting the sheets from the tray is an image eraser comprising a nozzle for applying a treatment for removal of toner, a toner removal roller and a pressure roller and the likes. By means of a transport roller, sheets are transferred from the image eraser to an intermediate tray or a registration roller for feeding sheets to an image forming position. The image eraser is actuated for image erasure while the image forming apparatus is not performing an image forming operation. The sheets from which the image is removed are received by the intermediate tray which, in turn, feeds the sheets for image forming operation if it is determined before execution of the operation that the sheets in the intermediate tray match with a sheet size specified for the operation.

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Nara, Japan

Takao Horiuchi