Patents by Inventor Daisuke Akagi

Daisuke Akagi 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: 20240069461
    Abstract: A light emitting chip includes: a first data storage unit configured to store data for causing a first light emitting unit to emit light; a second data storage unit configured to store data for causing a second light emitting unit to emit light; a signal output unit configured to output a first trigger signal and a second trigger signal delayed with respect to the first trigger signal; and a drive unit configured to drive the first light emitting unit, in a case where the first trigger signal is output, based on data stored in the first data storage unit, and drive the second light emitting unit, in a case where the second trigger signal is output, based on data stored in the second data storage unit.
    Type: Application
    Filed: August 11, 2023
    Publication date: February 29, 2024
    Inventor: DAISUKE AKAGI
  • Publication number: 20240069462
    Abstract: There is provided an image forming apparatus including: a photosensitive member that is driven to rotate; an exposure head that includes a plurality of light-emitting portions arranged at different positions in an axial direction of the photosensitive member, wherein each of pixels of an image corresponding to an output resolution of the image forming apparatus is formed by multiple light-emitting portions of the plurality of light-emitting portions, and a control unit configured to control the number of light-emitting portions to be driven to form each of the pixels of the image based on correction data.
    Type: Application
    Filed: August 18, 2023
    Publication date: February 29, 2024
    Inventors: DAISUKE AKAGI, HIROTAKA SEKI
  • Publication number: 20240027932
    Abstract: According to an aspect of the present invention, a light-emitting chip includes: a plurality of light-emitting portions and a drive circuit. The drive circuit includes: first to fourth transferring unit, a first switch configured to switch between a first state in which start signals output by the fourth and third transferring units are output to the second and first transferring unit, respectively, and a second state in which the start signal output by the fourth and the third transferring units are output to the third and second transferring unit, respectively, and a second switch configured to switch between a third state in which the first and third transferring units and the first signal line are connected, and a fourth state in which the first and third transferring units and a second signal line are connected.
    Type: Application
    Filed: July 13, 2023
    Publication date: January 25, 2024
    Inventor: DAISUKE AKAGI
  • Publication number: 20230384707
    Abstract: An image forming apparatus includes a photosensitive member, light-emitting chips, and a controller integrated circuit (IC). Provided in each of the light-emitting chips are a plurality of light-emitting units that emit light for exposing the photosensitive member, a circuit unit that turns on and off the plurality of light-emitting units based on image data, and a storage unit that stores control data indicating a target amount of light of the plurality of light-emitting units. The light-emitting chips are arranged along a rotational axis direction of the photosensitive member. Each of the light-emitting chips is connected to the controller IC by a different one of a plurality of signal lines. In a case where the output control data is transmitted from the controller IC to each of the light-emitting chips via the different one of the plurality of signal lines, the transmitted control data is stored in the storage unit.
    Type: Application
    Filed: May 17, 2023
    Publication date: November 30, 2023
    Inventor: DAISUKE AKAGI
  • Publication number: 20230384706
    Abstract: An image forming apparatus includes a light-emitting chip, a substrate on which a plurality of light emitting chips are mounted, a controller, and a switch. The light-emitting chip includes a light-emitting portion, which emits light exposing a photosensitive drum surface based on supply of a driving current to the light-emitting portion, and a driving portion that drives the light-emitting portion. The controller controls the driving portion by transmitting a signal to the light-emitting chip and outputs a digital signal corresponding to a target amount of light of the light-emitting portion to the light-emitting chip. Based on a control signal from the controller, the switch switches a connection state between the voltage source and the D/A converter to a first state where the voltage source supplies the reference voltage to the D/A converter, and a second state where an electrical connection between the voltage source and the D/A converter is disconnected.
    Type: Application
    Filed: May 17, 2023
    Publication date: November 30, 2023
    Inventor: DAISUKE AKAGI
  • Publication number: 20230324828
    Abstract: An image forming apparatus includes: an exposure head including a light emitting portion that includes a first electrode layer including a plurality of electrodes that are two-dimensionally arranged in a rotation direction and a rotational axis direction of a photosensitive member, a light emitting layer stacked on the first electrode layer, and a second electrode layer through which light is transmissible; and a controller configured to control a voltage applied to each of the plurality of electrodes in such a way that one pixel is formed by controlling the voltage applied to the plurality of electrodes arranged at different positions in the rotation direction, in which the plurality of electrodes are arranged in such a way that a pitch of the plurality of electrodes included in the first electrode layer in the rotation direction is an integer multiple of a resolution of an image formed by the image forming apparatus in the rotation direction, excluding an equal multiple.
    Type: Application
    Filed: June 16, 2023
    Publication date: October 12, 2023
    Inventor: DAISUKE AKAGI
  • Publication number: 20230324826
    Abstract: An exposure head configured to expose a photosensitive drum includes: a substrate; a plurality of strip-shaped semiconductor chips each including a plurality of light emitting elements that emit light and a drive circuit that drives the light emitting element, the plurality of semiconductor chips being arranged on the substrate; and a lens array configured to collect light from the light emitting elements on the photosensitive drum. The drive circuit operates between a first potential and a second potential, the light emitting element operates between a third potential and a fourth potential, and a potential difference between the third potential and the fourth potential is equal to or larger than a potential difference between the first potential and the second potential.
    Type: Application
    Filed: May 30, 2023
    Publication date: October 12, 2023
    Inventor: Daisuke Akagi
  • Patent number: 11451687
    Abstract: An original image is read as an aggregate of a plurality of pixels in which adjacent pixels have different colors (R, G, and B) in a main scanning direction and in a sub-scanning direction, and the read pixels of the respective colors are stored in a line memory in association with information on relative positions of the pixels with respect to another pixel. Then, the stored pixels are sorted so that pixels having the same color are adjacent to each other, and an abnormal pixel (dust) not present in the original image is detected based on the state of the sorted pixels. With this, the dust not present in the original image is detected without increasing the cost, and the dust is corrected without forming a conspicuous trace of correction.
    Type: Grant
    Filed: April 24, 2021
    Date of Patent: September 20, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Daisuke Akagi, Katsuhiro Ishido
  • Patent number: 11363159
    Abstract: In a line sensor including color filters that are periodically disposed in a light-receiving-element row, a problem called a “mixture of colors” occurs. A “mixture of colors” occurs when light that has been transmitted through a color filter differing from a color filter corresponding to a light receiving element is incident upon the light receiving element. In a CMOS sensor 107 including a light-receiving-element row in which a plurality of photodiodes 1204 are disposed side by side in a main scanning direction and a plurality of color filters 1202 that are disposed in correspondence with the plurality of photodiodes 1204, the center of each color filter 1202 is displaced in a direction of the center of the light-receiving-element row from the center of the photodiode 1204 corresponding to the color filter.
    Type: Grant
    Filed: September 14, 2020
    Date of Patent: June 14, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Daisuke Akagi, Masanori Ogura, Jun Iba, Atsushi Furubayashi
  • Patent number: 11330127
    Abstract: An image reading apparatus includes: at least one processor configured to: set reading resolutions in a first and a second directions when reading an image of a document; determine an inclination amount of the document; correct an image to reduce the inclination amount; output image data indicative of an corrected image; and obtain information relating to a first direction length of the document. In a case where the first direction length of the document is less than a predetermined length and the processor outputs the image data indicative of the corrected image, whose resolution in the first direction is a first resolution and resolution in the second direction is a second resolution lower than the first resolution, the processor sets the reading resolution in the second direction to a third resolution higher than the second resolution.
    Type: Grant
    Filed: January 15, 2021
    Date of Patent: May 10, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Daisuke Akagi, Satoshi Seki, Kaoru Hamada
  • Patent number: 11290669
    Abstract: An image reading apparatus includes a light emitter configured to irradiate an original with light, a reading device including a line sensor and an amplifier, a detector configured to detect a temperature of the reading device, a sampling portion configured to sample a value of the analog signal output from the amplifier, a converter configured to convert the value sampled by the sampling portion into a digital value. The sampling portion is configured to sample the analog signal corresponding to a first light-receiving element included in the plurality of light-receiving elements at a first timing in a case where the temperature detected by the detector is a first temperature, and to sample the analog signal corresponding to the first light-receiving element at a second timing, which is later than the first timing.
    Type: Grant
    Filed: March 31, 2020
    Date of Patent: March 29, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventor: Daisuke Akagi
  • Patent number: 11133119
    Abstract: A flat cable includes a first region including a first conducting wire, a second region including a second conducting wire and divided from the first region by a slit provided between the first conducting wire and the second conducting wire, the first region and the second region being at least partially overlapped with each other when viewed in a thickness direction of the flat cable.
    Type: Grant
    Filed: April 10, 2019
    Date of Patent: September 28, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Daisuke Akagi
  • Publication number: 20210250459
    Abstract: An image reading apparatus includes: at least one processor configured to: set reading resolutions in a first and a second directions when reading an image of a document; determine an inclination amount of the document; correct an image to reduce the inclination amount; output image data indicative of an corrected image; and obtain information relating to a first direction length of the document. In a case where the first direction length of the document is less than a predetermined length and the processor outputs the image data indicative of the corrected image, whose resolution in the first direction is a first resolution and resolution in the second direction is a second resolution lower than the first resolution, the processor sets the reading resolution in the second direction to a third resolution higher than the second resolution.
    Type: Application
    Filed: January 15, 2021
    Publication date: August 12, 2021
    Inventors: Daisuke AKAGI, Satoshi SEKI, Kaoru HAMADA
  • Publication number: 20210243337
    Abstract: An original image is read as an aggregate of a plurality of pixels in which adjacent pixels have different colors (R, G, and B) in a main scanning direction and in a sub-scanning direction, and the read pixels of the respective colors are stored in a line memory in association with information on relative positions of the pixels with respect to another pixel. Then, the stored pixels are sorted so that pixels having the same color are adjacent to each other, and an abnormal pixel (dust) not present in the original image is detected based on the state of the sorted pixels. With this, the dust not present in the original image is detected without increasing the cost, and the dust is corrected without forming a conspicuous trace of correction.
    Type: Application
    Filed: April 24, 2021
    Publication date: August 5, 2021
    Inventors: Daisuke Akagi, Katsuhiro Ishido
  • Patent number: 11025801
    Abstract: An original image is read as an aggregate of a plurality of pixels in which adjacent pixels have different colors (R, G, and B) in a main scanning direction and in a sub-scanning direction, and the read pixels of the respective colors are stored in a line memory in association with information on relative positions of the pixels with respect to another pixel. Then, the stored pixels are sorted so that pixels having the same color are adjacent to each other, and an abnormal pixel (dust) not present in the original image is detected based on the state of the sorted pixels. With this, the dust not present in the original image is detected without increasing the cost, and the dust is corrected without forming a conspicuous trace of correction.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: June 1, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Daisuke Akagi, Katsuhiro Ishido
  • Patent number: 10887473
    Abstract: An image reading apparatus comprises a platen, a support, a reader, an open/close unit, a first obtainer, a mark, a positioning member, and a determiner. A position of the mark on a pressing surface of the cover, is provided at a position at which, in a case where a sheet of a maximum size among standard sizes that can entirely fit in a readable range of the reader is positioned with respect to the positioning member, at least a portion of the mark is not hidden by the sheet as viewed from the reader.
    Type: Grant
    Filed: February 7, 2020
    Date of Patent: January 5, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventor: Daisuke Akagi
  • Publication number: 20200412903
    Abstract: In a line sensor including color filters that are periodically disposed in a light-receiving-element row, a problem called a “mixture of colors” occurs. A “mixture of colors” occurs when light that has been transmitted through a color filter differing from a color filter corresponding to a light receiving element is incident upon the light receiving element. In a CMOS sensor 107 including a light-receiving-element row in which a plurality of photodiodes 1204 are disposed side by side in a main scanning direction and a plurality of color filters 1202 that are disposed in correspondence with the plurality of photodiodes 1204, the center of each color filter 1202 is displaced in a direction of the center of the light-receiving-element row from the center of the photodiode 1204 corresponding to the color filter.
    Type: Application
    Filed: September 14, 2020
    Publication date: December 31, 2020
    Inventors: Daisuke Akagi, Masanori Ogura, Jun Iba, Atsushi Furubayashi
  • Publication number: 20200336689
    Abstract: An image reading apparatus includes a light emitter configured to irradiate an original with light, a reading device including a line sensor and an amplifier, a detector configured to detect a temperature of the reading device, a sampling portion configured to sample a value of the analog signal output from the amplifier, a converter configured to convert the value sampled by the sampling portion into a digital value. The sampling portion is configured to sample the analog signal corresponding to a first light-receiving element included in the plurality of light-receiving elements at a first timing in a case where the temperature detected by the detector is a first temperature, and to sample the analog signal corresponding to the first light-receiving element at a second timing, which is later than the first timing.
    Type: Application
    Filed: March 31, 2020
    Publication date: October 22, 2020
    Inventor: Daisuke Akagi
  • Patent number: 10812673
    Abstract: In a line sensor including color filters that are periodically disposed in a light-receiving-element row, a problem called a “mixture of colors” occurs. A “mixture of colors” occurs when light that has been transmitted through a color filter differing from a color filter corresponding to a light receiving element is incident upon the light receiving element. In a CMOS sensor 107 including a light-receiving-element row in which a plurality of photodiodes 1204 are disposed side by side in a main scanning direction and a plurality of color filters 1202 that are disposed in correspondence with the plurality of photodiodes 1204, the center of each color filter 1202 is displaced in a direction of the center of the light-receiving-element row from the center of the photodiode 1204 corresponding to the color filter.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: October 20, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Daisuke Akagi, Masanori Ogura, Jun Iba, Atsushi Furubayashi
  • Publication number: 20200177737
    Abstract: An image reading apparatus comprises a platen, a support, a reader, an open/close unit, a first obtainer, a mark, a positioning member, and a determiner. A position of the mark on a pressing surface of the cover, is provided at a position at which, in a case where a sheet of a maximum size among standard sizes that can entirely fit in a readable range of the reader is positioned with respect to the positioning member, at least a portion of the mark is not hidden by the sheet as viewed from the reader.
    Type: Application
    Filed: February 7, 2020
    Publication date: June 4, 2020
    Inventor: Daisuke Akagi