Patents by Inventor Tatsuo Ohyama
Tatsuo Ohyama 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).
-
Patent number: 11853823Abstract: An image forming system includes processing circuitry. The processing circuitry generates print image data for printing a first image in a print area on a conveyance medium. The processing circuitry controls printing on the conveyance medium based on the print image data. The processing circuitry determines a position at which a second image is printed in a cut area, based on a position of a cutting mark, to generate the print image data including the second image, the second image including identification information to identify each page of the conveyance medium, the cut area being an area to be cut in the print area.Type: GrantFiled: August 29, 2022Date of Patent: December 26, 2023Assignee: Ricoh Company, Ltd.Inventor: Tatsuo Ohyama
-
Publication number: 20230094188Abstract: An image forming system includes processing circuitry. The processing circuitry generates print image data for printing a first image in a print area on a conveyance medium. The processing circuitry controls printing on the conveyance medium based on the print image data. The processing circuitry determines a position at which a second image is printed in a cut area, based on a position of a cutting mark, to generate the print image data including the second image, the second image including identification information to identify each page of the conveyance medium, the cut area being an area to be cut in the print area.Type: ApplicationFiled: August 29, 2022Publication date: March 30, 2023Applicant: Ricoh Company, Ltd.Inventor: Tatsuo OHYAMA
-
Patent number: 9847792Abstract: A communication apparatus includes a serializer configured to convert parallel data into serial data and output the serial data; and a deserializer configured to convert the serial data output from the serializer into parallel data and output the parallel data. The serializer is configured to add first data used for detecting unique data in the parallel data before the unique data, add second data used for detecting the unique data after the unique data, and add third data whose length is variable to each of the first data and the second data.Type: GrantFiled: January 12, 2016Date of Patent: December 19, 2017Assignee: RICOH COMPANY, LTD.Inventors: Tatsuya Miyadera, Satoshi Ohmiya, Tatsuo Ohyama, Masahiko Oikawa, Yuichiro Shukuya, Makoto Higashiyama, Yasuhiro Abe
-
Patent number: 9397697Abstract: A communication apparatus includes a serializer configured to convert parallel data into serial data and output the serial data; and a deserializer configured to convert the serial data output from the serializer into parallel data and output the parallel data. The serializer is configured to add first data used for detecting unique data in the parallel data before the unique data, add second data used for detecting the unique data after the unique data, and add third data whose length is variable to each of the first data and the second data.Type: GrantFiled: January 20, 2015Date of Patent: July 19, 2016Assignee: RICOH COMPANY, LTD.Inventors: Tatsuya Miyadera, Satoshi Ohmiya, Tatsuo Ohyama, Masahiko Oikawa, Yuichiro Shukuya, Makoto Higashiyama, Yasuhiro Abe
-
Publication number: 20160126977Abstract: A communication apparatus includes a serializer configured to convert parallel data into serial data and output the serial data; and a deserializer configured to convert the serial data output from the serializer into parallel data and output the parallel data. The serializer is configured to add first data used for detecting unique data in the parallel data before the unique data, add second data used for detecting the unique data after the unique data, and add third data whose length is variable to each of the first data and the second data.Type: ApplicationFiled: January 12, 2016Publication date: May 5, 2016Inventors: Tatsuya MIYADERA, Satoshi OHMIYA, Tatsuo OHYAMA, Masahiko OIKAWA, Yuichiro SHUKUYA, Makoto HIGASHIYAMA, Yasuhiro ABE
-
Patent number: 9310710Abstract: An image writing device includes an exposure device to repeatedly expose a surface of an image bearer along a main-scanning direction during an image forming period to write an image on the image bearer, a speed change detector to detect a change in moving speed in a sub-scanning direction of the surface of the image bearer, a first signal generation circuit to generate a first signal, an image forming period signal generation circuit to generate an image forming period signal synchronously with the first signal, a second signal generation circuit to generate a second signal, the second signal initially appearing in the image forming period being in synchronization with the first signal, and a line synchronization signal generation circuit to generate a line synchronization signal synchronously with the second signal and transmit the line synchronization signal to the exposure device during the image forming period.Type: GrantFiled: February 26, 2015Date of Patent: April 12, 2016Assignee: RICOH COMPANY, LTD.Inventors: Masashi Suzuki, Koichi Murota, Tatsuo Ohyama, Yuichiro Shukuya, Tatsuya Miyadera
-
Patent number: 9223244Abstract: An image writing device includes an exposure unit including an exposure head, writing an image onto an image bearing surface of a photoconductor by causing the exposure head to repeatedly expose; and a write control unit transmitting image data to be written by the exposure unit to the exposure unit on a one-line basis. Further the write control unit generates a write cycle reference signal having a cycle corresponding to writing resolution, counts a clock by a predetermined count value, generates a write cycle signal by delaying the write cycle reference signal by a time period, generates a data request signal to request transmission of one line of the image data to a controller unit based on the write cycle signal, and stores the one line of the image data transmitted from the controller unit.Type: GrantFiled: January 29, 2015Date of Patent: December 29, 2015Assignee: RICOH COMPANY, LTD.Inventors: Koichi Murota, Tatsuo Ohyama, Yuichiro Shukuya, Masashi Suzuki, Tatsuya Miyadera
-
Publication number: 20150261116Abstract: An image writing device includes an exposure unit including an exposure head, writing an image onto an image bearing surface of a photoconductor by causing the exposure head to repeatedly expose; and a write control unit transmitting image data to be written by the exposure unit to the exposure unit on a one-line basis. Further the write control unit generates a write cycle reference signal having a cycle corresponding to writing resolution, counts a clock by a predetermined count value, generates a write cycle signal by delaying the write cycle reference signal by a time period, generates a data request signal to request transmission of one line of the image data to a controller unit based on the write cycle signal, and stores the one line of the image data transmitted from the controller unit.Type: ApplicationFiled: January 29, 2015Publication date: September 17, 2015Inventors: Koichi MUROTA, Tatsuo OHYAMA, Yuichiro SHUKUYA, Masashi SUZUKI, Tatsuya MIYADERA
-
Publication number: 20150261117Abstract: An image writing device includes an exposure device to repeatedly expose a surface of an image bearer along a main-scanning direction during an image forming period to write an image on the image bearer, a speed change detector to detect a change in moving speed in a sub-scanning direction of the surface of the image bearer, a first signal generation circuit to generate a first signal, an image forming period signal generation circuit to generate an image forming period signal synchronously with the first signal, a second signal generation circuit to generate a second signal, the second signal initially appearing in the image forming period being in synchronization with the first signal, and a line synchronization signal generation circuit to generate a line synchronization signal synchronously with the second signal and transmit the line synchronization signal to the exposure device during the image forming period.Type: ApplicationFiled: February 26, 2015Publication date: September 17, 2015Applicant: RICOH COMPANY, LTD.Inventors: Masashi SUZUKI, Koichi MUROTA, Tatsuo OHYAMA, Yuichiro SHUKUYA, Tatsuya MIYADERA
-
Publication number: 20150222290Abstract: A communication apparatus includes a serializer configured to convert parallel data into serial data and output the serial data; and a deserializer configured to convert the serial data output from the serializer into parallel data and output the parallel data. The serializer is configured to add first data used for detecting unique data in the parallel data before the unique data, add second data used for detecting the unique data after the unique data, and add third data whose length is variable to each of the first data and the second data.Type: ApplicationFiled: January 20, 2015Publication date: August 6, 2015Inventors: Tatsuya MIYADERA, Satoshi OHMIYA, Tatsuo OHYAMA, Masahiko OIKAWA, Yuichiro SHUKUYA, Makoto HIGASHIYAMA, Yasuhiro ABE
-
Patent number: 8957928Abstract: An image forming apparatus includes a photoconductor, a charger to charge the photoconductor, a multi-beam scanning unit, a development unit, and a transfer unit. The multi-beam scanning unit includes a vertical cavity surface emitting laser as a light source having light emitting elements arrayed in main and sub-scanning directions by setting an interval between light emitting elements adjacently disposed at a center portion of the scanning unit in the sub-scanning direction narrower than an interval between other light emitting elements adjacently disposed at other portions of the scanning unit in the sub-scanning direction, a deflecting element to deflect light emitted from the light emitting elements to scan the surface of photoconductor by an interlace scan, and a light intensity adjustment unit to adjust light intensity of the light emitting elements adjacently disposed at the center portion relative to a light intensity of other light emitting elements adjacently disposed at other portions.Type: GrantFiled: May 24, 2011Date of Patent: February 17, 2015Assignee: Ricoh Company, Ltd.Inventor: Tatsuo Ohyama
-
Patent number: 8817323Abstract: An image forming apparatus includes: a request signal generating unit that generates a predetermined timing signal and transmits a request signal for a specified number of times for requesting line-by-line image data during a time interval at which the timing signal is generated; and a memory control unit that sequentially saves, in a memory unit, line-by-line image data transmitted in response to the request signal and reads line-by-line image data saved in the memory unit to transmit the line-by-line image data to a drive control unit. Upon receiving a predetermined increase request, the request signal generating unit shifts a generation timing of the timing signal so that, during the time interval, the request signal can be transmitted for an increased number of times than the specified number of times, and gradually shortens the timing signal by a predetermined shortening time period.Type: GrantFiled: September 14, 2010Date of Patent: August 26, 2014Assignee: Ricoh Company, LimitedInventor: Tatsuo Ohyama
-
Patent number: 8605131Abstract: An image forming apparatus that performs a shading correction includes a light source that emits a light beam; a light-source drive unit that drives the light source; and a light-quantity-adjustment-amount control unit that performs an adjustment of a light quantity in accordance with a shading correction curve by controlling, for the light-source drive unit, a light-quantity adjustment amount and an increase/decrease cycle of the light-quantity adjustment amount. The increase/decrease cycle is a unit of time within a time period during which the light-quantity adjustment amount increases or, decreases.Type: GrantFiled: November 13, 2012Date of Patent: December 10, 2013Assignee: Ricoh Company, LimitedInventor: Tatsuo Ohyama
-
Publication number: 20130127975Abstract: An image forming apparatus that performs a shading correction includes a light source that emits a light beam; a light-source drive unit that drives the light source; and a light-quantity-adjustment-amount control unit that performs an adjustment of a light quantity in accordance with a shading correction curve by controlling, for the light-source drive unit, a light-quantity adjustment amount and an increase/decrease cycle of the light-quantity adjustment amount. The increase/decrease cycle is a unit of time within a time period during which the light-quantity adjustment amount increases or, decreases.Type: ApplicationFiled: November 13, 2012Publication date: May 23, 2013Inventor: Tatsuo OHYAMA
-
Patent number: 8077359Abstract: A novel image processing system includes a pixel position indicator and a pixel inserting unit. The pixel position indicator is configured to indicate insertion positions in the image data. The pixel inserting unit is configured to enlarge a size of the image data by inserting an additional pixel at each of the insertion positions and accordingly shifting the original pixels in a given direction. The additional pixel has a value lower than a given threshold. Each insertion position is at an approximate center of an area formed of pixels having values higher than the given threshold. A novel image forming apparatus incorporates such an image processing system and an electrophotographic system. The electrophotographic system is configured to form an image by irradiating a photoconductive surface with a laser beam according to the processed image data.Type: GrantFiled: June 11, 2008Date of Patent: December 13, 2011Assignee: Ricoh Company LimitedInventors: Yumiko Kishi, Toshio Ohide, Tatsuo Ohyama, Hidetoshi Yamashita, Nobuyoshi Kaima
-
Publication number: 20110298883Abstract: An image forming apparatus includes a photoconductor, a charger to charge the photoconductor, a multi-beam scanning unit, a development unit, and a transfer unit. The multi-beam scanning unit includes a vertical cavity surface emitting laser as a light source having light emitting elements arrayed in main and sub-scanning directions by setting an interval between light emitting elements adjacently disposed at a center portion of the scanning unit in the sub-scanning direction narrower than an interval between other light emitting elements adjacently disposed at other portions of the scanning unit in the sub-scanning direction, a deflecting element to deflect light emitted from the light emitting elements to scan the surface of photoconductor by an interlace scan, and a light intensity adjustment unit to adjust light intensity of the light emitting elements adjacently disposed at the center portion relative to a light intensity of other light emitting elements adjacently disposed at other portions.Type: ApplicationFiled: May 24, 2011Publication date: December 8, 2011Inventor: Tatsuo OHYAMA
-
Publication number: 20110063680Abstract: An image forming apparatus includes: a request signal generating unit that generates a predetermined timing signal and transmits a request signal for a specified number of times for requesting line-by-line image data during a time interval at which the timing signal is generated; and a memory control unit that sequentially saves, in a memory unit, line-by-line image data transmitted in response to the request signal and reads line-by-line image data saved in the memory unit to transmit the line-by-line image data to a drive control unit. Upon receiving a predetermined increase request, the request signal generating unit shifts a generation timing of the timing signal so that, during the time interval, the request signal can be transmitted for an increased number of times than the specified number of times, and gradually shortens the timing signal by a predetermined shortening time period.Type: ApplicationFiled: September 14, 2010Publication date: March 17, 2011Inventor: Tatsuo OHYAMA
-
Publication number: 20100239288Abstract: An image forming apparatus that performs a shading correction includes a light source that emits a light beam; a light-source drive unit that drives the light source; and a light-quantity-adjustment-amount control unit that performs an adjustment of a light quantity in accordance with a shading correction curve by controlling, for the light-source drive unit, a light-quantity adjustment amount and an increase/decrease cycle of the light-quantity adjustment amount. The increase/decrease cycle is a unit of time within a time period during which the light-quantity adjustment amount increases or decreases.Type: ApplicationFiled: March 18, 2010Publication date: September 23, 2010Inventor: Tatsuo OHYAMA
-
Publication number: 20080309951Abstract: A novel image processing system includes a pixel position indicator and a pixel inserting unit. The pixel position indicator is configured to indicate insertion positions in the image data. The pixel inserting unit is configured to enlarge a size of the image data by inserting an additional pixel at each of the insertion positions and accordingly shifting the original pixels in a given direction. The additional pixel has a value lower than a given threshold. Each insertion position is at an approximate center of an area formed of pixels having values higher than the given threshold. A novel image forming apparatus incorporates such an image processing system and an electrophotographic system. The electrophotographic system is configured to form an image by irradiating a photoconductive surface with a laser beam according to the processed image data.Type: ApplicationFiled: June 11, 2008Publication date: December 18, 2008Inventors: Yumiko KISHI, Toshio Ohide, Tatsuo Ohyama, Hidetoshi Yamashita, Nobuyoshi Kaima