Patents by Inventor Yuichiro Shukuya

Yuichiro Shukuya 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).

  • Publication number: 20220150376
    Abstract: An image forming apparatus includes a first medium scanned with a first signal, a second medium scanned with a second signal, a rotary polygon mirror that deflects the first and second signals, a synchronization signal generation circuit that generates a synchronization signal representing a time to start scanning the first medium, and at least one pseudo synchronization signal generation circuit that generates a pseudo synchronization signal with the synchronization signal. The pseudo synchronization signal represents a time to start scanning the second medium. Based on a previously calculated period of the synchronization signal and a period of the synchronization signal counted on a particular surface of the polygon mirror, the pseudo synchronization signal generation circuit generates a particular value for generating the pseudo synchronization signal.
    Type: Application
    Filed: September 29, 2021
    Publication date: May 12, 2022
    Applicant: Ricoh Company, Ltd.
    Inventor: Yuichiro SHUKUYA
  • Publication number: 20210400159
    Abstract: An image processing apparatus includes an invisible light source configured to emit invisible light to a subject, a visible light source configured to emit visible light to the subject, an invisible image reading sensor configured to read invisible reflection light reflected from the subject and acquire an invisible image, and a visible image reading sensor configured to read visible reflection light reflected from the subject and acquire a visible image. The invisible reflection light is a part of the invisible light emitted from the invisible light source. The visible reflection light is a part of the visible light emitted from the visible light source. The image processing apparatus further includes circuitry configured to restore information lost in the invisible image acquired by the invisible image reading sensor.
    Type: Application
    Filed: June 4, 2021
    Publication date: December 23, 2021
    Inventors: Tadaaki OYAMA, Masamoto NAKAZAWA, Yuichiro SHUKUYA
  • Patent number: 9847792
    Abstract: 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: Grant
    Filed: January 12, 2016
    Date of Patent: December 19, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tatsuya Miyadera, Satoshi Ohmiya, Tatsuo Ohyama, Masahiko Oikawa, Yuichiro Shukuya, Makoto Higashiyama, Yasuhiro Abe
  • Patent number: 9588472
    Abstract: An image formation apparatus for forming an image and test patterns. The image formation apparatus includes a storage unit that stores dither matrix data used to form the image and the test patterns; and an image formation unit that forms the test patterns based on the dither matrix data. A number of tones of the test patterns to be formed by the image formation unit is changed and the number of tones is determined based on a size of the dither matrix data and a number of bits per pixel within the dither matrix data.
    Type: Grant
    Filed: July 13, 2015
    Date of Patent: March 7, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuhiro Abe, Satoshi Ohmiya, Masahiko Oikawa, Makoto Higashiyama, Yuichiro Shukuya, Tatsuya Miyadera
  • Patent number: 9397697
    Abstract: 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: Grant
    Filed: January 20, 2015
    Date of Patent: July 19, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tatsuya Miyadera, Satoshi Ohmiya, Tatsuo Ohyama, Masahiko Oikawa, Yuichiro Shukuya, Makoto Higashiyama, Yasuhiro Abe
  • Publication number: 20160126977
    Abstract: 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: Application
    Filed: January 12, 2016
    Publication date: May 5, 2016
    Inventors: Tatsuya MIYADERA, Satoshi OHMIYA, Tatsuo OHYAMA, Masahiko OIKAWA, Yuichiro SHUKUYA, Makoto HIGASHIYAMA, Yasuhiro ABE
  • Patent number: 9310710
    Abstract: 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: Grant
    Filed: February 26, 2015
    Date of Patent: April 12, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Masashi Suzuki, Koichi Murota, Tatsuo Ohyama, Yuichiro Shukuya, Tatsuya Miyadera
  • Publication number: 20160018774
    Abstract: An image formation apparatus for forming an image and test patterns. The image formation apparatus includes a storage unit that stores dither matrix data used to form the image and the test patterns; and an image formation unit that forms the test patterns based on the dither matrix data. A number of tones of the test patterns to be formed by the image formation unit is changed and the number of tones is determined based on a size of the dither matrix data and a number of bits per pixel within the dither matrix data.
    Type: Application
    Filed: July 13, 2015
    Publication date: January 21, 2016
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yasuhiro Abe, Satoshi Ohmiya, Masahiko Oikawa, Makoto Higashiyama, Yuichiro Shukuya, Tatsuya Miyadera
  • Patent number: 9223244
    Abstract: 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: Grant
    Filed: January 29, 2015
    Date of Patent: December 29, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Koichi Murota, Tatsuo Ohyama, Yuichiro Shukuya, Masashi Suzuki, Tatsuya Miyadera
  • Patent number: 9170516
    Abstract: An image forming apparatus includes: an image forming unit that forms a pattern image for image quality adjustment on an image carrier; a detection unit that detects the pattern image for the image quality adjustment; an image quality adjustment control unit that controls an image quality adjustment process in accordance with a result of detection of the detection unit; a reception unit that receives a color mode selected from among a plurality of kinds of color modes; and a calculation unit that calculates a total pattern length so that a total length of the pattern image for the image quality adjustment in a sub-scanning direction is equal in any of the color modes, wherein the image forming unit forms the pattern image for the image quality adjustment so that the total length of the pattern image for the image quality adjustment is equal to the calculated total pattern length.
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: October 27, 2015
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Yuichiro Shukuya, Katsuhiko Maeda
  • Publication number: 20150261116
    Abstract: 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: Application
    Filed: January 29, 2015
    Publication date: September 17, 2015
    Inventors: Koichi MUROTA, Tatsuo OHYAMA, Yuichiro SHUKUYA, Masashi SUZUKI, Tatsuya MIYADERA
  • Publication number: 20150261117
    Abstract: 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: Application
    Filed: February 26, 2015
    Publication date: September 17, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Masashi SUZUKI, Koichi MUROTA, Tatsuo OHYAMA, Yuichiro SHUKUYA, Tatsuya MIYADERA
  • Publication number: 20150222290
    Abstract: 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: Application
    Filed: January 20, 2015
    Publication date: August 6, 2015
    Inventors: Tatsuya MIYADERA, Satoshi OHMIYA, Tatsuo OHYAMA, Masahiko OIKAWA, Yuichiro SHUKUYA, Makoto HIGASHIYAMA, Yasuhiro ABE
  • Patent number: 8902463
    Abstract: An image forming apparatus includes: Photoreceptors; an image carrier; a plurality of light emitting element arrays each configured to emit a light beam to a corresponding one of the photoreceptors independently; an angle adjustment unit to adjust a mounting angle of the light emitting element arrays to a frame of the image forming apparatus; a pattern forming unit to form a positional error correction pattern of each color on the image carrier; a optical detector to detect the correction pattern formed on the image carrier; a positional error calculation unit to calculate a printing skew error and a main scanning scaling error of the light emitting element arrays based on the correction pattern detected by the optical detector; a skew correction unit to correct the printing skew error detected by the positional error calculation unit; and further a main scanning scaling error correction unit.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: December 2, 2014
    Assignee: Ricoh Company, Ltd.
    Inventor: Yuichiro Shukuya
  • Publication number: 20140072317
    Abstract: An image forming apparatus includes: an image forming unit that forms a pattern image for image quality adjustment on an image carrier; a detection unit that detects the pattern image for the image quality adjustment; an image quality adjustment control unit that controls an image quality adjustment process in accordance with a result of detection of the detection unit; a reception unit that receives a color mode selected from among a plurality of kinds of color modes; and a calculation unit that calculates a total pattern length so that a total length of the pattern image for the image quality adjustment in a sub-scanning direction is equal in any of the color modes, wherein the image forming unit forms the pattern image for the image quality adjustment so that the total length of the pattern image for the image quality adjustment is equal to the calculated total pattern length.
    Type: Application
    Filed: September 6, 2013
    Publication date: March 13, 2014
    Inventors: Yuichiro SHUKUYA, Katsuhiko Maeda
  • Publication number: 20130107286
    Abstract: An image forming apparatus includes: Photoreceptors; an image carrier; a plurality of light emitting element arrays each configured to emit a light beam to a corresponding one of the photoreceptors independently; an angle adjustment unit to adjust a mounting angle of the light emitting element arrays to a frame of the image forming apparatus; a pattern forming unit to form a positional error correction pattern of each color on the image carrier; a optical detector to detect the correction pattern formed on the image carrier; a positional error calculation unit to calculate a printing skew error and a main scanning scaling error of the light emitting element arrays based on the correction pattern detected by the optical detector; a skew correction unit to correct the printing skew error detected by the positional error calculation unit; and further a main scanning scaling error correction unit.
    Type: Application
    Filed: September 25, 2012
    Publication date: May 2, 2013
    Inventor: Yuichiro SHUKUYA
  • Patent number: 8380093
    Abstract: An image forming apparatus and image forming method capable of achieving both high-speed printing of less-than-full-color images and high quality printing of multicolor images. The apparatus includes a color shift pattern output unit, a correction amount acquisition unit, and a correction unit to correct at least one or more positions of an image in a sub-scanning direction on a recording medium when a first transfer member transfers an unfixed image and a second transfer member transfers an unfixed image.
    Type: Grant
    Filed: August 6, 2010
    Date of Patent: February 19, 2013
    Assignee: Ricoh Company, Ltd.
    Inventor: Yuichiro Shukuya
  • Patent number: 8363081
    Abstract: An image forming apparatus forms a latent image on a photoconductor by irradiating light beams from a plurality of light sources onto the photoconductor. A detection unit detects a time difference between timings of start writing on the photoconductor by the light beams in a main scanning direction. A calculation unit calculates a shift of each of the light beams in a sub-scanning direction based on the time difference detected by the detection unit and a rotation speed of the photoconductor. A correction unit corrects irradiated positions on the photoconductor by the light beams in the sub-scanning direction based on the shift calculated by the calculation unit.
    Type: Grant
    Filed: February 15, 2011
    Date of Patent: January 29, 2013
    Assignee: Ricoh Company, Ltd.
    Inventor: Yuichiro Shukuya
  • Publication number: 20110205324
    Abstract: An image forming apparatus forms a latent image on a photoconductor by irradiating light beams from a plurality of light sources onto the photoconductor. A detection unit detects a time difference between timings of start writing on the photoconductor by the light beams in a main scanning direction. A calculation unit calculates a shift of each of the light beams in a sub-scanning direction based on the time difference detected by the detection unit and a rotation speed of the photoconductor. A correction unit corrects irradiated positions on the photoconductor by the light beams in the sub-scanning direction based on the shift calculated by the calculation unit.
    Type: Application
    Filed: February 15, 2011
    Publication date: August 25, 2011
    Applicant: RICOH COMPANY, LTD.
    Inventor: Yuichiro SHUKUYA
  • Publication number: 20110043588
    Abstract: An image forming apparatus and image forming method capable of achieving both high-speed printing of less-than-full-color images and high quality printing of multicolor images. The apparatus includes a color shift pattern output unit, a correction amount acquisition unit, and a correction unit to correct at least one or more positions of an image in a sub-scanning direction on a recording medium when a first transfer member transfers an unfixed image and a second transfer member transfers an unfixed image.
    Type: Application
    Filed: August 6, 2010
    Publication date: February 24, 2011
    Applicant: Ricoh Company, Ltd.
    Inventor: Yuichiro Shukuya