Patents by Inventor Nobuhiro Shirai

Nobuhiro Shirai 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: 10325188
    Abstract: A light scanning device includes: a first semiconductor laser 44a that emits a light beam L1; a polygonal mirror 42 that deflects the light beam L1; a reflective mirror 64a that reflects the light beam L1 deflected by the polygonal mirror 42 and causes the light beam L1 to enter a photosensitive drum 13; and a BD sensor 72 that detects the light beam L1 deflected by the polygonal mirror 42. The light scanning device scans the photosensitive drum 13 with the light beam L1 and set scanning timing of the photosensitive drum 13 using the light beam L1 based on detection timing of the light beam L1 using the BD sensor 72. The BD sensor 72 is arranged in the position farther from the polygonal mirror 42 than the last reflective mirror 64a that reflects the light beam L1 immediately before entering the photosensitive drum 13 and arranged inside a scanning angle range ? of the light beam L1 corresponding to an effective scan area of the photosensitive drum 13.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: June 18, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Nobuhiro Shirai
  • Publication number: 20180293470
    Abstract: A light scanning device includes: a first semiconductor laser 44a that emits a light beam L1; a polygonal mirror 42 that deflects the light beam L1; a reflective mirror 64a that reflects the light beam L1 deflected by the polygonal mirror 42 and causes the light beam L1 to enter a photosensitive drum 13; and a BD sensor 72 that detects the light beam L1 deflected by the polygonal mirror 42. The light scanning device scans the photosensitive drum 13 with the light beam L1 and set scanning timing of the photosensitive drum 13 using the light beam L1 based on detection timing of the light beam L1 using the BD sensor 72. The BD sensor 72 is arranged in the position farther from the polygonal mirror 42 than the last reflective mirror 64a that reflects the light beam L1 immediately before entering the photosensitive drum 13 and arranged inside a scanning angle range ? of the light beam L1 corresponding to an effective scan area of the photosensitive drum 13.
    Type: Application
    Filed: June 12, 2018
    Publication date: October 11, 2018
    Inventor: Nobuhiro SHIRAI
  • Patent number: 10062016
    Abstract: A light scanning device includes: a first semiconductor laser 44a that emits a light beam L1; a polygonal mirror 42 that deflects the light beam L1; a reflective mirror 64a that reflects the light beam L1 deflected by the polygonal mirror 42 and causes the light beam L1 to enter a photosensitive drum 13; and a BD sensor 72 that detects the light beam L1 deflected by the polygonal mirror 42. The light scanning device scans the photosensitive drum 13 with the light beam L1 and set scanning timing of the photosensitive drum 13 using the light beam L1 based on detection timing of the light beam L1 using the BD sensor 72. The BD sensor 72 is arranged in the position farther from the polygonal mirror 42 than the last reflective mirror 64a that reflects the light beam L1 immediately before entering the photosensitive drum 13 and arranged inside a scanning angle range ? of the light beam L1 corresponding to an effective scan area of the photosensitive drum 13.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: August 28, 2018
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Nobuhiro Shirai
  • Patent number: 9323050
    Abstract: Respective first semiconductor lasers 44a and 44b and respective second semiconductor lasers 45a and 45b are arranged on a drive substrate 46 (YZ plane) such that the emission directions of light beams L1 to L4 of the respective first semiconductor lasers 44a and 44b and the respective second semiconductor lasers 45a and 45b are perpendicular to the YZ plane. On the YZ plane, the respective first semiconductor lasers 44a and 44b and the respective second semiconductor lasers 45a and 45b are divided to two mutually different lines y1 and y2 in the lateral direction perpendicular to the rotation axis of a polygonal mirror 42, and the respective first semiconductor lasers 44a and 44b and the respective second semiconductor lasers 45a and 45b are arranged on respective different lines z1 to z4 in the vertical direction as the rotation axis direction of the polygonal mirror 42.
    Type: Grant
    Filed: October 15, 2013
    Date of Patent: April 26, 2016
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Manabu Matsuo, Nobuhiro Shirai
  • Publication number: 20160110634
    Abstract: A light scanning device includes: a first semiconductor laser 44a that emits a light beam L1; a polygonal mirror 42 that deflects the light beam L1; a reflective mirror 64a that reflects the light beam L1 deflected by the polygonal mirror 42 and causes the light beam L1 to enter a photosensitive drum 13; and a BD sensor 72 that detects the light beam L1 deflected by the polygonal mirror 42. The light scanning device scans the photosensitive drum 13 with the light beam L1 and set scanning timing of the photosensitive drum 13 using the light beam L1 based on detection timing of the light beam L1 using the BD sensor 72. The BD sensor 72 is arranged in the position farther from the polygonal mirror 42 than the last reflective mirror 64a that reflects the light beam L1 immediately before entering the photosensitive drum 13 and arranged inside a scanning angle range ? of the light beam L1 corresponding to an effective scan area of the photosensitive drum 13.
    Type: Application
    Filed: December 28, 2015
    Publication date: April 21, 2016
    Inventor: Nobuhiro Shirai
  • Patent number: 9250439
    Abstract: A light scanning device includes: a first semiconductor laser 44a that emits a light beam L1; a polygonal mirror 42 that deflects the light beam L1; a reflective mirror 64a that reflects the light beam L1 deflected by the polygonal mirror 42 and causes the light beam L1 to enter a photosensitive drum 13; and a BD sensor 72 that detects the light beam L1 deflected by the polygonal mirror 42. The light scanning device scans the photosensitive drum 13 with the light beam L1 and set scanning timing of the photosensitive drum 13 using the light beam L1 based on detection timing of the light beam L1 using the BD sensor 72. The BD sensor 72 is arranged in the position farther from the polygonal mirror 42 than the last reflective mirror 64a that reflects the light beam L1 immediately before entering the photosensitive drum 13 and arranged inside a scanning angle range ? of the light beam L1 corresponding to an effective scan area of the photosensitive drum 13.
    Type: Grant
    Filed: October 15, 2013
    Date of Patent: February 2, 2016
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Nobuhiro Shirai
  • Patent number: 9194544
    Abstract: There are provided a light-emitting device, an illuminating apparatus, and a display apparatus in which, in order to apply light to an object to be illuminated with uniformity in light intensity, the quantity of light which is applied to a part of an edge of a to-be-illuminated region of the to-be-illuminated object located near a light-emitting section can be lessened. A backlight unit includes a printed substrate, a plurality of light-emitting sections each of which has a base support, an LED chip and a lens, and reflective members each of which is placed around the light-emitting section and has a first wall portion and a second wall portion.
    Type: Grant
    Filed: June 1, 2012
    Date of Patent: November 24, 2015
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yasuhiro Ono, Makoto Masuda, Kenzo Ohkubo, Nobuhiro Shirai, Tetsushi Ito, Takasumi Wada
  • Publication number: 20150268463
    Abstract: Respective first semiconductor lasers 44a and 44b and respective second semiconductor lasers 45a and 45b are arranged on a drive substrate 46 (YZ plane) such that the emission directions of light beams L1 to L4 of the respective first semiconductor lasers 44a and 44b and the respective second semiconductor lasers 45a and 45b are perpendicular to the YZ plane. On the YZ plane, the respective first semiconductor lasers 44a and 44b and the respective second semiconductor lasers 45a and 45b are divided to two mutually different lines y1 and y2 in the lateral direction perpendicular to the rotation axis of a polygonal mirror 42, and the respective first semiconductor lasers 44a and 44b and the respective second semiconductor lasers 45a and 45b are arranged on respective different lines z1 to z4 in the vertical direction as the rotation axis direction of the polygonal mirror 42.
    Type: Application
    Filed: October 15, 2013
    Publication date: September 24, 2015
    Inventors: Manabu Matsuo, Nobuhiro Shirai
  • Publication number: 20150248009
    Abstract: A light scanning device includes: a first semiconductor laser 44a that emits a light beam L1; a polygonal mirror 42 that deflects the light beam L1; a reflective mirror 64a that reflects the light beam L1 deflected by the polygonal mirror 42 and causes the light beam L1 to enter a photosensitive drum 13; and a BD sensor 72 that detects the light beam L1 deflected by the polygonal mirror 42. The light scanning device scans the photosensitive drum 13 with the light beam L1 and set scanning timing of the photosensitive drum 13 using the light beam L1 based on detection timing of the light beam L1 using the BD sensor 72. The BD sensor 72 is arranged in the position farther from the polygonal mirror 42 than the last reflective mirror 64a that reflects the light beam L1 immediately before entering the photosensitive drum 13 and arranged inside a scanning angle range ? of the light beam L1 corresponding to an effective scan area of the photosensitive drum 13.
    Type: Application
    Filed: October 15, 2013
    Publication date: September 3, 2015
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Nobuhiro Shirai
  • Patent number: 9116458
    Abstract: A light scanning device of the invention includes a scan deflection range of each of the light fluxes deflected by the deflecting part in a scan period of the scan object with the respective light fluxes is divided into a first deflection range where a reflection angle of each of the light fluxes with respect to the deflecting part is small and a second deflection range where the reflection angle is large. A polarization direction of each of the light fluxes is set such that a reflectivity of the reflective mirror when each of the light fluxes deflected in the second deflection range is reflected becomes larger than a reflectivity of the reflective mirror when each of the light fluxes deflected in the first deflection range is reflected.
    Type: Grant
    Filed: May 1, 2014
    Date of Patent: August 25, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Nobuhiro Shirai, Takaharu Motoyama
  • Publication number: 20150226400
    Abstract: The invention provides a light-emitting device for use in a backlight unit of a display apparatus including a display panel, which is capable of applying light to an illumination object with uniformity in brightness in the planar direction of the illumination object and can be made lower in profile, as well as an illuminating apparatus and a display apparatus including the light-emitting device. A backlight unit (1) is provided with a printed circuit board (12), a plurality of light-emitting portions (111) disposed on the printed circuit board (12) and having a base support (111b), an LED chip (111a) and a lens (112), and a reflective member (118) disposed around each light-emitting portion (111) and having a first reflecting member (1131) and a second reflecting member (1132).
    Type: Application
    Filed: February 27, 2012
    Publication date: August 13, 2015
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Takasumi Wada, Yasuhiro Ono, Makoto Masuda, Kenzo Ohkubo, Nobuhiro Shirai
  • Patent number: 8988751
    Abstract: An optical scanning device is disclosed. The optical scanning device comprises an overfilled optical system in which an incoming light beam, formed wider than a width in a rotation direction of a rotating multifaceted mirror's reflective surface, is caused to be incident on the reflective surface and a scanning object's scanning surface is scanned by an outgoing beam reflected by the reflective surface. The incoming beam is incident on the rotating multifaceted mirror's reflective surface, having an angle with respect to a virtual vertical surface that is vertical to the scanning surface and the outgoing beam's scanning direction. A light amount distribution for positions on the scanning surface in the scanning direction is corrected based on a slope of a straight line that expresses a ratio of light amount changes for positions on the scanning surface in the scanning direction when scanning the scanning surface using the outgoing beam.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: March 24, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takaharu Motoyama, Nobuhiro Shirai
  • Publication number: 20150002593
    Abstract: A light scanning device of the invention includes a scan deflection range of each of the light fluxes deflected by the deflecting part in a scan period of the scan object with the respective light fluxes is divided into a first deflection range where a reflection angle of each of the light fluxes with respect to the deflecting part is small and a second deflection range where the reflection angle is large. A polarization direction of each of the light fluxes is set such that a reflectivity of the reflective mirror when each of the light fluxes deflected in the second deflection range is reflected becomes larger than a reflectivity of the reflective mirror when each of the light fluxes deflected in the first deflection range is reflected.
    Type: Application
    Filed: May 1, 2014
    Publication date: January 1, 2015
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Nobuhiro SHIRAI, Takaharu MOTOYAMA
  • Publication number: 20140376219
    Abstract: The invention provides a light-emitting device which is capable of applying light to a display panel with uniformity in brightness and can be made lower in profile. A light-emitting device (11) includes an LED chip (111a), a base support (111b) which supports the LED chip (111a), and a lens (112) disposed in contact with the LED chip (111a) so as to cover the LED chip (111a) and the base support (111b). The lens (112) has first curved sections (1122) which reflect light that has reached a top surface (112a) so that the reflected light is emitted from a side surface (112b), and second curved sections (1123) which refract light that has reached the top surface (112a) to outside so that the refracted light is emitted from the top surface (112a).
    Type: Application
    Filed: February 27, 2012
    Publication date: December 25, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yasuhiro Ono, Makoto Masuda, Takasumi Wada, Kenzo Ohkubo, Nobuhiro Shirai
  • Publication number: 20140226311
    Abstract: There are provided a light-emitting device for use in a backlight unit of a display apparatus equipped with a display panel, which can be made lower in profile and is capable of applying light to the display panel with uniformity in the brightness of the display panel in the planar direction of the display panel, as well as a display apparatus equipped with the light-emitting device. A backlight unit includes a printed substrate, a plurality of light-emitting sections each having a base support, an LED chip and a lens, and a reflective member surrounding the light-emitting section. A specular reflection portion is formed in a first reflective region of the reflective member.
    Type: Application
    Filed: May 22, 2012
    Publication date: August 14, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yasuhiro Ono, Makoto Masuda, Kenzo Ohkubo, Nobuhiro Shirai, Takasumi Wada
  • Publication number: 20140160733
    Abstract: There are provided a light-emitting device, an illuminating apparatus, and a display apparatus in which, in order to apply light to an object to be illuminated with uniformity in light intensity, the quantity of light which is applied to a part of an edge of a to-be-illuminated region of the to-be-illuminated object located near a light-emitting section can be lessened. A backlight unit includes a printed substrate, a plurality of light-emitting sections each of which has a base support, an LED chip and a lens, and reflective members each of which is placed around the light-emitting section and has a first wall portion and a second wall portion.
    Type: Application
    Filed: June 1, 2012
    Publication date: June 12, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yasuhiro Ono, Makoto Masuda, Kenzo Ohkubo, Nobuhiro Shirai, Tetsushi Ito, Takasumi Wada
  • Publication number: 20140140046
    Abstract: There are provided a light-emitting device for use in a backlight unit of a display apparatus equipped with a display panel, which can be made lower in profile and is capable of applying light to the display panel with uniformity in the brightness of the display panel in a planar direction of the display panel, as well as a display apparatus equipped with the light-emitting device. A backlight unit includes a plurality of light-emitting devices each having a printed substrate, a base support, an LED chip and a lens, and a reflective member surrounding the light-emitting device. A high-reflection portion is formed in a first reflective region of the reflective member.
    Type: Application
    Filed: May 22, 2012
    Publication date: May 22, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yasuhiro Ono, Makoto Masuda, Kenzo Ohkubo, Nobuhiro Shirai, Takasumi Wada
  • Publication number: 20140092584
    Abstract: The invention provides a light-emitting device a light-emitting device for use in a backlight unit of a display apparatus including a display panel, which is capable of applying light to an illumination object with uniformity in brightness in a planar direction of the illumination object and can be made lower in profile. A backlight unit (1) is provided with: a printed circuit board (12); a plurality of light-emitting portions (111) disposed on the printed circuit board (12) and having a base support (111b), an LED chip (111a) and a lens (112); and a first reflective member (118) disposed on a periphery of each light-emitting portion (111) and having a first reflecting portion (1181) and a second reflecting portion (1182).
    Type: Application
    Filed: February 27, 2012
    Publication date: April 3, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yasuhiro Ono, Makoto Masuda, Kenzo Ohkubo, Nobuhiro Shirai, Takasumi Wada
  • Patent number: 8525863
    Abstract: An optical scanning device includes an enclosure having a plurality of windows covered with transparent members. The enclosure houses a plurality of light sources, a scanning portion, optical elements and a light amount attenuation portion. The scanning portion deflects each of a plurality of light beams emitted from a plurality of light sources at a constant angular speed in a main scanning direction. The optical elements constitute respective light paths from the scanning portion to the windows for the plurality of light beams, respectively. The light amount attenuation portion attenuates light amount in a light path of a first light source among the plurality of light sources in a downstream side of the position where a light beam emitted from a second light source enters as stray light. The drive portion drives the first light source so as to compensate for light amount attenuated by the light amount attenuation portion.
    Type: Grant
    Filed: June 15, 2011
    Date of Patent: September 3, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kenzo Ohkubo, Nobuhiro Shirai, Takasumi Wada
  • Patent number: 8456723
    Abstract: An optical box for an optical scanner includes an optical housing and a lid. The optical housing has an opening and a side wall surrounding the opening. The side wall includes inward recessed parts, each of which has a protrusion formed on its outer side. The protrusion can engage with the lid. The lid can so engage with the optical housing as to cover the opening of the housing. The lid has a pair of dust guard walls, between which the whole side wall of the optical housing is sandwiched when the lid is in engagement with the housing.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: June 4, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Nobuhiro Shirai