Patents by Inventor Toshihiro Takesue
Toshihiro Takesue has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8446641Abstract: An image processing apparatus includes a correcting unit that performs enlarging or reducing correction on an image to be processed by determining an arrangement of pixels that are to be added to or deleted from gradational image data of the image to be processed based on an angle at which the pixels are to be arranged with respect to a horizontal direction of the image to be processed or with respect to a vertical direction of the image to be processed, and a pixel array control unit that changes the angle at which the pixels are arranged based on a test image of the image data to be processed after being corrected by the correcting unit.Type: GrantFiled: March 7, 2011Date of Patent: May 21, 2013Assignee: Ricoh Company, LimitedInventors: Toshihiro Takesue, Kenichi Ono, Nobuyoshi Kaima
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Publication number: 20110222085Abstract: An image processing apparatus includes a correcting unit that performs enlarging or reducing correction on an image to be processed by determining an arrangement of pixels that are to be added to or deleted from gradational image data of the image to be processed based on an angle at which the pixels are to be arranged with respect to a horizontal direction of the image to be processed or with respect to a vertical direction of the image to be processed, and a pixel array control unit that changes the angle at which the pixels are arranged based on a test image of the image data to be processed after being corrected by the correcting unit.Type: ApplicationFiled: March 7, 2011Publication date: September 15, 2011Applicant: Ricoh Company, LimitedInventors: Toshihiro Takesue, Kenichi Ono, Nobuyoshi Kaima
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Patent number: 7907853Abstract: An image forming apparatus includes a condition determining device that calculates a deviation amount of image data from a normal condition and determines if the image forming apparatus is in an abnormal condition. An abnormal section specifying device specifies an abnormal section in the image forming apparatus based on a condition of the image forming apparatus. An image processing device executes image processing for abnormal use in accordance with an output of the abnormal section specifying device when the image data condition determining device determines that the image forming apparatus is in an abnormal condition. A service person call output device outputs a service person call signal indicative of calling a service person to a center when the image data condition determining device determines that the image forming apparatus is in an abnormal condition.Type: GrantFiled: June 18, 2007Date of Patent: March 15, 2011Assignee: Ricoh Company, Ltd.Inventors: Toshihiro Takesue, Takeshi Ogawa, Seiji Miyahara
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Patent number: 7746502Abstract: A main vector: m^=(mx, my) and a sub-vector: s^=(sx, sy) determining cyclic structure of a basic matrix are defined, and a positional vector for a pixel configuring the basic matrix Pi^=(Pix, Piy) is defined, where the suffix i denotes an i-th pixel configuring the basic matrix. Then, the pixels configuring the basic matrix are arranged in such a manner as to satisfy the cyclic structure, and transformation of Pi^?Pi^+km^+ls^ is carried out where k and l are arbitrary integers, and may be negative values. Then a new shape of the basic matrix is obtained with Pi^+km^+ls^ as a new pixel positional vector Pi^.Type: GrantFiled: December 2, 2004Date of Patent: June 29, 2010Assignee: Ricoh Company, Ltd.Inventors: Kei Yasutomi, Takeshi Ogawa, Toshihiro Takesue
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Publication number: 20070292146Abstract: An image forming apparatus includes a condition determining device that calculates a deviation amount of image data from a normal condition and determines if the image forming apparatus is in an abnormal condition. An abnormal section specifying device specifies an abnormal section in the image forming apparatus based on a condition of the image forming apparatus. An image processing device executes image processing for abnormal use in accordance with an output of the abnormal section specifying device when the image data condition determining device determines that the image forming apparatus is in an abnormal condition. A service person call output device outputs a service person call signal indicative of calling a service person to a center when the image data condition determining device determines that the image forming apparatus is in an abnormal condition.Type: ApplicationFiled: June 18, 2007Publication date: December 20, 2007Inventors: Toshihiro Takesue, Takeshi Ogawa, Seiji Miyahara
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Patent number: 7006119Abstract: An image forming apparatus forms on a photoconductive body an evaluation chart including first patterns and second patterns. In the first pattern, with respect to a row of dots formed in a main scan direction by a predetermined light beam, a row of dots formed by a next light beam is shifted in the main scan direction, and in the second pattern, with respect to the row of dots formed in the main scan direction by the predetermined light beam, the row of dots formed by the next light beam is shifted in the main scan direction but in a direction opposite to a shift direction of the first pattern. The evaluation chart includes a first pattern group which is formed by the first patterns which are repeated, and a second pattern group which is formed by the second patterns which are repeated.Type: GrantFiled: September 29, 2004Date of Patent: February 28, 2006Assignees: Ricoh Company, Ltd., Ricoh CorporationInventor: Toshihiro Takesue
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Publication number: 20050219628Abstract: A main vector: m{circumflex over (?)}=(mx, my) and a sub-vector: s{circumflex over (?)}=(sx, sy) determining cyclic structure of a basic matrix are defined, and a positional vector for a pixel configuring the basic matrix Pi{circumflex over (?)}=(Pix, Piy) is defined, where the suffix i denotes an i-th pixel configuring the basic matrix. Then, the pixels configuring the basic matrix are arranged in such a manner as to satisfy the cyclic structure, and transformation of Pi{circumflex over (?)}?Pi{circumflex over (?)}+km{circumflex over (?)}+ls{circumflex over (?)} is carried out where k and l are arbitrary integers, and may be negative values. Then a new shape of the basic matrix is obtained with Pi{circumflex over (?)}+km{circumflex over (?)}+ls{circumflex over (?)} as a new pixel positional vector Pi{circumflex over (?)}.Type: ApplicationFiled: December 2, 2004Publication date: October 6, 2005Inventors: Kei Yasutomi, Takeshi Ogawa, Toshihiro Takesue
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Publication number: 20050093969Abstract: An image forming apparatus forms on a photoconductive body an evaluation chart including first patterns and second patterns. In the first pattern, with respect to a row of dots formed in a main scan direction by a predetermined light beam, a row of dots formed by a next light beam is shifted in the main scan direction, and in the second pattern, with respect to the row of dots formed in the main scan direction by the predetermined light beam, the row of dots formed by the next light beam is shifted in the main scan direction but in a direction opposite to a shift direction of the first pattern. The evaluation chart includes a first pattern group which is formed by the first patterns which are repeated, and a second pattern group which is formed by the second patterns which are repeated.Type: ApplicationFiled: September 29, 2004Publication date: May 5, 2005Inventor: Toshihiro Takesue
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Patent number: 6839074Abstract: An image forming apparatus forms on a photoconductive body an evaluation chart including first patterns and second patterns. In the first pattern, with respect to a row of dots formed in a main scan direction by a predetermined light beam, a row of dots formed by a next light beam is shifted in the main scan direction, and in the second pattern, with respect to the row of dots formed in the main scan direction by the predetermined light beam, the row of dots formed by the next light beam is shifted in the main scan direction but in a direction opposite to a shift direction of the first pattern. The evaluation chart includes a first pattern group which is formed by the first patterns which are repeated, and a second pattern group which is formed by the second patterns which are repeated.Type: GrantFiled: September 17, 2003Date of Patent: January 4, 2005Assignee: Ricoh Company, Ltd.Inventor: Toshihiro Takesue
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Publication number: 20040075877Abstract: An image forming apparatus forms on a photoconductive body an evaluation chart including first patterns and second patterns. In the first pattern, with respect to a row of dots formed in a main scan direction by a predetermined light beam, a row of dots formed by a next light beam is shifted in the main scan direction, and in the second pattern, with respect to the row of dots formed in the main scan direction by the predetermined light beam, the row of dots formed by the next light beam is shifted in the main scan direction but in a direction opposite to a shift direction of the first pattern. The evaluation chart includes a first pattern group which is formed by the first patterns which are repeated, and a second pattern group which is formed by the second patterns which are repeated.Type: ApplicationFiled: September 17, 2003Publication date: April 22, 2004Inventor: Toshihiro Takesue
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Patent number: 6654041Abstract: An image forming apparatus forms on a photoconductive body an evaluation chart including first patterns and second patterns. In the first pattern, with respect to a row of dots formed in a main scan direction by a predetermined light beam, a row of dots formed by a next light beam is shifted in the main scan direction, and in the second pattern, with respect to the row of dots formed in the main scan direction by the predetermined light beam, the row of dots formed by the next light beam is shifted in the main scan direction but in a direction opposite to a shift direction of the first pattern. The evaluation chart includes a first pattern group which is formed by the first patterns which are repeated, and a second pattern group which is formed by the second patterns which are repeated.Type: GrantFiled: November 5, 2001Date of Patent: November 25, 2003Assignee: Ricoh Company, Ltd.Inventor: Toshihiro Takesue
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Publication number: 20020063770Abstract: An image forming apparatus forms on a photoconductive body an evaluation chart including first patterns and second patterns. In the first pattern, with respect to a row of dots formed in a main scan direction by a predetermined light beam, a row of dots formed by a next light beam is shifted in the main scan direction, and in the second pattern, with respect to the row of dots formed in the main scan direction by the predetermined light beam, the row of dots formed by the next light beam is shifted in the main scan direction but in a direction opposite to a shift direction of the first pattern. The evaluation chart includes a first pattern group which is formed by the first patterns which are repeated, and a second pattern group which is formed by the second patterns which are repeated.Type: ApplicationFiled: November 5, 2001Publication date: May 30, 2002Inventor: Toshihiro Takesue
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Patent number: 5754202Abstract: An ink jet recording apparatus includes a recording head for ejecting droplets of ink and a driving circuit for driving the recording head. The recording head includes a base, a plate on which a plurality of openings are formed; an ink chamber to be filled with ink being formed between the base and the plate; and heater elements, provided in the ink chamber so as to face the openings of the plate, each of which heater elements supplies heat energy to ink adjacent thereto so that the air bubble is generated on each of the heater elements and so that the air bubble grows toward a corresponding one of the openings. An area of each of the openings of the plate is greater than an area each of the heater elements. When the driving circuit activates each of the heater elements, a droplet of ink is ejected due to the air bubble from the corresponding one of the openings of the plate.Type: GrantFiled: November 26, 1996Date of Patent: May 19, 1998Assignee: Ricoh Company, Ltd.Inventors: Takuro Sekiya, Takayuki Yamaguchi, Mitsuru Shingyouchi, Makoto Obu, Michio Umezawa, Tetsuro Hirota, Takesada Hirose, Hideki Ohtsuki, Toshihiro Takesue
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Patent number: 5010353Abstract: A laser recording apparatus wherein a laser beam modulated in accordance with image signals and deflected by a deflector having a deflecting element in a predetermined direction scans a recording medium through a beam correcting lens system interposed between the deflector and the recording medium to write in the image signals on the recording medium. The deflecting element of the deflector is molded integrally of a frame, a reflecting mirror, a drive coil and a ligament. The deflecting element is made of a crystal base.Type: GrantFiled: March 1, 1990Date of Patent: April 23, 1991Assignee: Konica CorporationInventors: Takashi Murahashi, Toshihiko Nakazawa, Toshihiro Takesue, Toshihiro Motoi
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Patent number: 4996540Abstract: An image recording apparatus having a beam scanning optical system using a deflector having a deflecting member, wherein a resilient member is interposed between the optical system including said deflector and an image forming portion. The resilient member is made of a viscous resilient elastomer of low hardness.Type: GrantFiled: January 24, 1989Date of Patent: February 26, 1991Assignee: Konica CorporationInventors: Toshihiro Motoi, Toshihiko Nakazawa, Toshihiro Takesue, Satoshi Takahashi, Takashi Murahashi
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Patent number: 4926195Abstract: A light beam recording system in which the beam is deflected after passage through a focusing element to scan a recording medium. An optical image surface correction system is employed between the deflector and recording medium for correction of the curvature of the field in the main scanning direction. The optical correction system includes an aspherical surface and deviation from a paraxial generating spherical surface to the aspherical surface.Type: GrantFiled: May 13, 1988Date of Patent: May 15, 1990Assignee: Konica CorporationInventors: Takashi Murahashi, Hisao Fujita, Toshihiko Nakazawa, Toshihiro Takesue, Toshihiro Motoi
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Patent number: 4910535Abstract: An image forming apparatus wherein a toner image obtained by developing a first electrostatic latent image with a first color dry toner by a first developing device and a toner image obtained by developing a second electrostatic latent image with second color dry toner which is different in color from said first color dry toner by a second developing means are superposed on an image retainer, and wherein toner feeding speeds at which the first and second developing devices develop the first and second electrostatic latent images, resepctively, are different from each other and an attached amount of the second color toner is smaller than that of the first color toner.Type: GrantFiled: January 27, 1989Date of Patent: March 20, 1990Assignee: Konica CorporationInventors: Kunihisa Yoshino, Kimio Nishizawa, Hiroshi Tokunaga, Toshihiro Takesue
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Patent number: 4837787Abstract: A seimconductor laser device wherein the quantity of light emitted from a semiconductor laser is monitored by a light quantity monitor circuit, and the output of the monitor circuit is compared by a comparator circuit with a reference voltage. An emission inhibiting device inhibits the semiconductor laser from emitting light in accordance with the output of the comparator circuit. The emission inhibiting device is arranged to inhibit the supply of an optical modulation signal to the semiconductor laser, or it comprises a current source for driving the semiconductor laser, the output of the current source being reduced when the emission of light from the laser is to be inhibited.Type: GrantFiled: May 26, 1987Date of Patent: June 6, 1989Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Toshihiro Takesue, Takashi Murahashi, Toshihiko Nakazawa
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Patent number: 4771431Abstract: A semiconductor laser driver is designed to detect a semiconductor laser output and control a drive voltage or current of a semiconductor laser so as to set a detected laser output to be a predetermined constant laser output. The laser driver includes an integrator for integrating the detected laser output, thereby utilizing an integrated signal as a semiconductor laser drive signal. The integrator integrates the difference between a voltage corresponding to the detected laser output and a reference voltage corresponding to the predetermined constant laser output.Type: GrantFiled: August 27, 1986Date of Patent: September 13, 1988Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Toshihiko Nakazawa, Takashi Murahashi, Yoshiyuki Ichihara, Toshihiro Takesue
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Patent number: 4763134Abstract: A laser recording apparatus wherein an image is recorded by laser beam scanning, and a stop amount of a stop is varied in accordance with recording magnification. The stop is disclosed at a position whereat it can vary the beam radius of a laser beam incident in a focusing lens. The optical intensity of a laser beam is varied in accordance with the recording magnification.Type: GrantFiled: August 20, 1986Date of Patent: August 9, 1988Assignee: Konishiroku Photo Industry Co.Inventors: Takashi Murahashi, Yoshiyuki Ichihara, Toshihiko Nakazawa, Toshihiro Takesue