Patents by Inventor Chikara Yamamoto

Chikara Yamamoto 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: 20220303679
    Abstract: A sound output device includes a waveform output unit and a sounding body. The waveform output unit is configured to output a sound waveform that includes a second waveform generated by a frequency modulation to a first waveform having a desired center frequency. The sounding body is configured to generate a sound corresponding to the sound waveform output from the waveform output unit.
    Type: Application
    Filed: June 8, 2022
    Publication date: September 22, 2022
    Inventor: Chikara YAMAMOTO
  • Publication number: 20220264064
    Abstract: A projection-type display device includes: a display element including a rectangular displayable region in which an image is displayable; and a projection optical system. Assuming that a focal length of the projection optical system is f and a length of a long side of the displayable region is w, 0.15<|f|/w<0.45 is satisfied. An absorption layer that absorbs light is provided in at least a portion of a non-optically effective surface of a lens which is disposed closer to a reduction side than a first lens closest to an enlargement side in the projection optical system and at least a part of a portion which is irradiated with light that has been emitted from an image and reflected by an enlargement-side surface of the first lens or a reduction-side surface of the first lens.
    Type: Application
    Filed: February 3, 2022
    Publication date: August 18, 2022
    Applicant: FUJIFILM Corporation
    Inventors: Yukiko NAGATOSHI, Akiko NAGAHARA, Chikara YAMAMOTO
  • Patent number: 11378873
    Abstract: A projection display device of a front projection type includes a light valve that modulates light based on image data and emits the light and an image forming optical system that projects an optical image of the light modulated by the light valve onto a projection surface, in which the image forming optical system includes a first optical system that includes at least one lens and a first reflection member that reflects the light emitted from the light valve toward the first optical system, the first optical system and the first reflection member are configured to be rotatable in a pitch direction, and the first reflection member rotates by a pitch angle ?/2 in conjunction with rotation of the first optical system by a pitch angle ?.
    Type: Grant
    Filed: February 25, 2021
    Date of Patent: July 5, 2022
    Assignee: FUJIFILM Corporation
    Inventor: Chikara Yamamoto
  • Publication number: 20220066297
    Abstract: The projection device includes a display element that displays an image, a projection optical system that forms an intermediate image of the image within an air space and projects the intermediate image to form a projected image, and a light shielding member that is disposed within the air space. The light shielding member includes a light shielding region which is positioned outside optical paths of all effective luminous fluxes emitted from the display element and used to form the projected image. The projection device satisfies a predetermined conditional expression.
    Type: Application
    Filed: August 13, 2021
    Publication date: March 3, 2022
    Applicant: FUJIFILM Corporation
    Inventor: Chikara YAMAMOTO
  • Publication number: 20220050284
    Abstract: The objective lens for an endoscope includes a stop, at least one lens which is disposed closer to an object side than the stop and of which an image-side lens surface is a concave surface, and at least one set of cemented lenses that is disposed closer to an image side than the stop; focusing on an object positioned at a nearest point from an object positioned at a farthest point is performed by movement of some lenses of an entire system along an optical axis; the objective lens for an endoscope has a total angle of view of 120° or more in a state where focusing on the object positioned at the farthest point is performed and in a state where focusing on the object positioned at the nearest point is performed; and the objective lens for an endoscope satisfies predetermined conditional expressions.
    Type: Application
    Filed: August 11, 2021
    Publication date: February 17, 2022
    Applicant: FUJIFILM Corporation
    Inventors: Chikara YAMAMOTO, Masato KONDO
  • Patent number: 11215907
    Abstract: An optical unit includes: a projection optical system on which light from a display unit is incident; a common optical system that projects light passing through the projection optical system to a projection target object and forms an image of a subject at a side of the projection target object; an optical member for guiding light passing through the projection optical system to the common optical system and guiding an intermediate image formed by at least a part of the common optical system to an imaging element; and an imaging optical system for forming the intermediate image on the imaging element, and an image forming position of the intermediate image is present between a component closest to a side of the projection target object among components constituting the common optical system and the optical member.
    Type: Grant
    Filed: August 20, 2020
    Date of Patent: January 4, 2022
    Assignee: FUJIFILM Corporation
    Inventors: Kazuki Inoue, Chikara Yamamoto
  • Publication number: 20210384873
    Abstract: An audio output device includes PWM output devices, a weighting unit, a mixer, and an amplifier. The PWM output devices divide audio data into multiple parts including an upper bit part to a lower bit part, and output the multiple parts of the audio data as PWM outputs. The weighting unit weights the PWM outputs from the PWM output devices. The mixer synthesizes the PWM outputs after being weighted. The amplifier supplies an electric current to a sounding body in accordance with a synthesis result by the mixer to cause the sounding body to emit a sound.
    Type: Application
    Filed: August 23, 2021
    Publication date: December 9, 2021
    Inventor: Chikara YAMAMOTO
  • Patent number: 11169369
    Abstract: An objective optical system for an endoscope forms an intermediate image at a position conjugate to an object surface, forms the intermediate image on an imaging plane again, and includes an aperture stop that is provided between the intermediate image and the imaging plane. Conditional expression (1) is satisfied in a case in which a distance between a lens surface closest to an object and a paraxial entrance pupil position on an optical axis is denoted by FS and a focal length of the entire system is denoted by f, |FS/f|<0.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: November 9, 2021
    Assignee: FUJIFILM Corporation
    Inventor: Chikara Yamamoto
  • Patent number: 11067876
    Abstract: The projection display device includes an imaging element, a light valve, and an image-forming optical system that projects an optical image according to light emitted from the light valve onto a magnification side imaging surface and forms an image of light incident from a magnification side on an imaging element. The image-forming optical system includes a first optical system that comprises at least one lens and is used in common in projection and imaging, and a separation member that separates an optical path from the light valve toward the first optical system from an optical path from the first optical system toward the imaging element. An antireflection layer is comprised in at least one of antireflection target surfaces having a significant influence of ghost light.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: July 20, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Kazuki Inoue, Chikara Yamamoto
  • Publication number: 20210181613
    Abstract: A projection display device of a front projection type includes a light valve that modulates light based on image data and emits the light and an image forming optical system that projects an optical image of the light modulated by the light valve onto a projection surface, in which the image forming optical system includes a first optical system that includes at least one lens and a first reflection member that reflects the light emitted from the light valve toward the first optical system, the first optical system and the first reflection member are configured to be rotatable in a pitch direction, and the first reflection member rotates by a pitch angle ?/2 in conjunction with rotation of the first optical system by a pitch angle ?.
    Type: Application
    Filed: February 25, 2021
    Publication date: June 17, 2021
    Applicant: FUJIFILM Corporation
    Inventor: Chikara YAMAMOTO
  • Patent number: 10897603
    Abstract: A projection display device includes an imaging element, a light source, a light valve that modulates light from the light source and emits modulated light, and an imaging optical system. The imaging optical system includes a first optical system that is used in common in projection and imaging, a second optical system that is used only in projection, a third optical system that is used only in imaging, and a separation member that separates an optical path from the second optical system toward the first optical system from an optical path from the first optical system toward the third optical system. The third optical system includes a first light shielding member that is arranged in the vicinity of a stop position of the third optical system and shields a part of a luminous flux.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: January 19, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Kazuki Inoue, Chikara Yamamoto
  • Patent number: 10897602
    Abstract: A projection display device includes an imaging element, a light source, a light valve that modulates light from the light source and emits modulated light in a prescribed polarization state, and an imaging optical system. The imaging optical system includes a first optical system that is used in common in projection and imaging, a second optical system that is used only in projection, a third optical system that is used only in imaging, and a separation member that separates an optical path from the second optical system toward the first optical system from an optical path from the first optical system toward the third optical system. The first optical system comprises a quarter wave plate and a polarizer arranged in a state of transmitting the light emitted from the light valve.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: January 19, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Kazuki Inoue, Chikara Yamamoto
  • Patent number: 10871641
    Abstract: An objective optical system for an endoscope forms an intermediate image at a position conjugate to an object surface and forms the intermediate image on an imaging plane again, and is adapted to satisfy Conditional expressions (1) to (3) in a case in which a maximum effective image height on the imaging plane is denoted by HI, a focal length of the entire system is denoted by f, an effective luminous flux diameter on a lens surface closest to an object is denoted by FD, an F-Number of the entire system is denoted by FNo, and a paraxial relay magnification of the intermediate image on the imaging plane is denoted by R. 0.7<HI/|f|??(1) FD×FNo/|f|6??(2) ?2<?R<?0.8??(3).
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: December 22, 2020
    Assignee: FUJIFILM Corporation
    Inventor: Chikara Yamamoto
  • Publication number: 20200379324
    Abstract: An optical unit includes: a projection optical system on which light from a display unit is incident; a common optical system that projects light passing through the projection optical system to a projection target object and forms an image of a subject at a side of the projection target object; an optical member for guiding light passing through the projection optical system to the common optical system and guiding an intermediate image formed by at least a part of the common optical system to an imaging element; and an imaging optical system for forming the intermediate image on the imaging element, and an image forming position of the intermediate image is present between a component closest to a side of the projection target object among components constituting the common optical system and the optical member.
    Type: Application
    Filed: August 20, 2020
    Publication date: December 3, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Kazuki INOUE, Chikara YAMAMOTO
  • Patent number: 10809520
    Abstract: An objective optical system for an endoscope forms an intermediate image at a position conjugate to an object surface and forms the intermediate image on an imaging plane again, and is adapted to satisfy Conditional expressions (1) to (3) in a case in which a maximum effective image height on the imaging plane is denoted by HI, a focal length of the entire system is denoted by f, an effective luminous flux diameter on a lens surface closest to an object is denoted by FD, a maximum effective luminous flux diameter among effective luminous flux diameters on lens surfaces of the entire system is denoted by BD, and a paraxial relay magnification of the intermediate image on the imaging plane is denoted by ?R. 0.7<HI|f|??(1) FD/BD<0.5??(2) ?2<?R<?0.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: October 20, 2020
    Assignee: FUJIFILM Corporation
    Inventor: Chikara Yamamoto
  • Publication number: 20200278594
    Abstract: The projection display device includes an imaging element, a light valve, and an image-forming optical system that projects an optical image according to light emitted from the light valve onto a magnification side imaging surface and forms an image of light incident from a magnification side on an imaging element. The image-forming optical system includes a first optical system that comprises at least one lens and is used in common in projection and imaging, and a separation member that separates an optical path from the light valve toward the first optical system from an optical path from the first optical system toward the imaging element. An antireflection layer is comprised in at least one of antireflection target surfaces having a significant influence of ghost light.
    Type: Application
    Filed: February 25, 2020
    Publication date: September 3, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Kazuki INOUE, Chikara YAMAMOTO
  • Publication number: 20200033702
    Abstract: A projection display device includes an imaging element, a light source, a light valve that modulates light from the light source and emits modulated light in a prescribed polarization state, and an imaging optical system. The imaging optical system includes a first optical system that is used in common in projection and imaging, a second optical system that is used only in projection, a third optical system that is used only in imaging, and a separation member that separates an optical path from the second optical system toward the first optical system from an optical path from the first optical system toward the third optical system. The first optical system comprises a quarter wave plate and a polarizer arranged in a state of transmitting the light emitted from the light valve.
    Type: Application
    Filed: July 15, 2019
    Publication date: January 30, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Kazuki INOUE, Chikara YAMAMOTO
  • Publication number: 20200033712
    Abstract: A projection display device includes an imaging element, a light source, a light valve that modulates light from the light source and emits modulated light, and an imaging optical system. The imaging optical system includes a first optical system that is used in common in projection and imaging, a second optical system that is used only in projection, a third optical system that is used only in imaging, and a separation member that separates an optical path from the second optical system toward the first optical system from an optical path from the first optical system toward the third optical system. The third optical system includes a first light shielding member that is arranged in the vicinity of a stop position of the third optical system and shields a part of a luminous flux.
    Type: Application
    Filed: July 15, 2019
    Publication date: January 30, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Kazuki Inoue, Chikara Yamamoto
  • Patent number: 10426323
    Abstract: The number of lenses within an objective lens for endoscopes is only three. The objective lens for endoscopes includes, in order from the object side, a first lens which is a single lens having a negative refractive power and a concave surface toward the object side, an aperture stop, and a cemented lens. The cemented lens is formed by cementing one positive lens and one negative lens together. Conditional formulae related to the distance from the surface toward the object side of the first lens to the aperture stop and the Abbe's numbers of the positive lens and the negative lens that constitute the cemented lens are satisfied.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: October 1, 2019
    Assignee: FUJIFILM Corporation
    Inventor: Chikara Yamamoto
  • Patent number: 10371942
    Abstract: There is provided a head-up display device that reflects and enlarges an image, which is displayed on an image display element, by a curved mirror, allows an observer to visually recognize the image as a virtual image, can change a virtual image display position, and is small. A head-up display device, which reflects and enlarges a displayed primary display image by a curved mirror and allows an observer to visually recognize the primary display image as a virtual image, includes a virtual-image-position change portion of changing a distance between the observer and the virtual image and a display-size change portion of changing the display size of the primary display image, and is adapted to satisfy the following conditional expression (1). 2.5<(Hf/Hn)/(Bf/Bn)<15.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: August 6, 2019
    Assignee: FUJIFILM Corporation
    Inventor: Chikara Yamamoto