Patents by Inventor Mitsuo Nakajima

Mitsuo Nakajima 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: 20220132071
    Abstract: A technology capable of suitably correcting a geometric distortion caused by a shape of a curved surface of a screen or the like and obtaining a suitable image easily viewable for a user is provided. A projector is an image display apparatus configured to project an image onto a screen and includes a projection lens arranged at a first position and a camera arranged at a second position. When the screen has a curved surface, a camera image obtained by capturing a first image projected on the screen by the camera is acquired, and a geometric transformation for correcting a geometric distortion caused by the curved surface seen from a first virtual viewpoint position (virtual viewpoint) is performed for an image to be displayed based on information of the camera image, the first position, and the second position, and a post-transformation image is projected onto the screen.
    Type: Application
    Filed: December 18, 2019
    Publication date: April 28, 2022
    Inventors: Kazuhiko TANAKA, Mitsuo NAKAJIMA, Haruhiko HIGUCHI
  • Patent number: 11178369
    Abstract: Provided are: a video-image transformation unit performing video-image transformation to a video image inputted from outside; a video-image projection unit projecting, onto a video-image projection surface, a video image video-image-transformed by the video-image transformation unit; an image sensor acquiring a projected range of the projected video image projected by the video-image projection unit and an image obtained by photographing a corrected object; and a processor performing a calculation processing using the image photographed by the image sensor.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: November 16, 2021
    Assignee: MAXELL, LTD.
    Inventors: Kazuhiko Tanaka, Mitsuo Nakajima, Haruhiko Higuchi
  • Publication number: 20210349934
    Abstract: An image display system is configured such that an image display device and an image processing device are connected to each other through a network. The image display device is provided with an instruction information generation unit for generating instruction information pertaining to image-processing to be performed on an image input signal; an image signal transmission unit for transmitting the instruction information to the image processing device; a corrected signal reception unit for receiving a corrected image input signal obtained through image-processing performed by the image processing device on the basis of the instruction information; and a display signal output unit for outputting an image output signal based on the corrected image input signal, to an object where an image is to be displayed. The image processing device receives the image input signal connected through the network and performs image-processing on the image input signal according to the instruction information.
    Type: Application
    Filed: July 23, 2021
    Publication date: November 11, 2021
    Inventors: Keisuke INATA, Yuusuke YATABE, Nobuaki KABUTO, Nobuhiro FUKUDA, Mitsuo NAKAJIMA
  • Patent number: 11146766
    Abstract: An object is to provide a technology for correcting color of a projected video more suitably. In order to solve the above-described object, a configuration includes a video projector configured to display a plurality of colors in time division and project a video to be displayed, and a color corrector configured to perform color correction on a projected video from the video projector. In the configuration, the projected video projected by the video projector is imaged by an internal imaging apparatus or an external imaging apparatus connected by wire or wireless connection, and the color corrector performs the color correction on the basis of a video corresponding to time division one period of the projected video detected from the imaged image or color information of the video corresponding to N times period of time division one period.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: October 12, 2021
    Assignee: MAXELL, LTD.
    Inventors: Haruhiko Higuchi, Kazuhiko Tanaka, Mitsuo Nakajima
  • Patent number: 11106723
    Abstract: An image display system is configured such that an image display device and an image processing device are connected to each other through a network. The image display device is provided with: an instruction information generation unit for generating instruction information pertaining to image-processing to be performed on an image input signal; an image signal transmission unit for transmitting the instruction information to the image processing device; a corrected signal reception unit for receiving a corrected image input signal obtained through image-processing performed by the image processing device on the basis of the instruction information; and a display signal output unit for outputting an image output signal based on the corrected image input signal, to an object where an image is to be displayed. The image processing device receives the image input signal connected through the network and performs image-processing on the image input signal according to the instruction information.
    Type: Grant
    Filed: April 30, 2020
    Date of Patent: August 31, 2021
    Assignee: MAXELL, LTD.
    Inventors: Keisuke Inata, Yuusuke Yatabe, Nobuaki Kabuto, Nobuhiro Fukuda, Mitsuo Nakajima
  • Publication number: 20200413014
    Abstract: Provided are: a video-image transformation unit performing video-image transformation to a video image inputted from outside; a video-image projection unit projecting, onto a video-image projection surface, a video image video-image-transformed by the video-image transformation unit; an image sensor acquiring a projected range of the projected video image projected by the video-image projection unit and an image obtained by photographing a corrected object; and a processor performing a calculation processing using the image photographed by the image sensor.
    Type: Application
    Filed: September 1, 2016
    Publication date: December 31, 2020
    Applicants: MAXELL, LTD., MAXELL, LTD.
    Inventors: Kazuhiko TANAKA, Mitsuo NAKAJIMA, Haruhiko HIGUCHI
  • Publication number: 20200332805
    Abstract: A water pump (1) according to the present invention comprises an electromagnetic clutch (60) that switches between a transmission state where a pump pulley (20) and an armature (83) of an armature assy (80) are made to frictionally engage to transmit drive force of the pump pulley (20) to a pump shaft (30) and a cutoff state where frictional engagement of the pump pulley (20) and the armature (83) of the armature assy (80) is released to cut off transmission of drive force from the pump pulley (20) to the pump shaft (30), and a flange member (120) provided on the armature assy (80) to rotate integrally with the pump shaft (30) and is configured such that when in the cutoff state, by magnetic attractive force between a permanent magnet (111) of the pump pulley (20) and a permanent magnet (131) of the flange member (120), the flange member (120) is rotated together with the rotation of the pump pulley (20).
    Type: Application
    Filed: April 17, 2017
    Publication date: October 22, 2020
    Applicant: TBK Co., Ltd.
    Inventors: Mitsuo NAKAJIMA, Makoto OHSAWA
  • Publication number: 20200257719
    Abstract: An image display system is configured such that an image display device and an image processing device are connected to each other through a network. The image display device is provided with: an instruction information generation unit for generating instruction information pertaining to image-processing to be performed on an image input signal; an image signal transmission unit for transmitting the instruction information to the image processing device; a corrected signal reception unit for receiving a corrected image input signal obtained through image-processing performed by the image processing device on the basis of the instruction information; and a display signal output unit for outputting an image output signal based on the corrected image input signal, to an object where an image is to be displayed. The image processing device receives the image input signal connected through the network and performs image-processing on the image input signal according to the instruction information.
    Type: Application
    Filed: April 30, 2020
    Publication date: August 13, 2020
    Inventors: Keisuke INATA, Yuusuke YATABE, Nobuaki KABUTO, Nobuhiro FUKUDA, Mitsuo NAKAJIMA
  • Patent number: 10706513
    Abstract: An image signal is subjected to image correction performed by an image correction unit on the basis of retinex processing. The image correction unit performs spectral decomposition for the image signal. A retinex unit performs retinex processing for the image signal subjected to the spectral decomposition, and a spectrum synthesis unit synthesizes the image signal output from the retinex unit. A transformation unit performs transformation from a RGB color space to a HSV color space, and an inverse transformation unit performs transformation from the HSV color space to the RGB color space. The transformation unit transforms an input image signal and outputs the transformed image signal to the spectral decomposition unit. The inverse transformation unit receives the output signal from the spectrum synthesis unit and outputs an image correction signal. Spectral decomposition of the image signal in the spectral decomposition unit is hue-based spectral decomposition in the HSV color space.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: July 7, 2020
    Assignee: MAXELL, LTD.
    Inventors: Nobuhiro Fukuda, Mitsuo Nakajima, Kazuhiko Tanaka
  • Patent number: 10678843
    Abstract: An image display system is configured such that an image display device and an image processing device are connected to each other through a network. The image display device is provided with: an instruction information generation unit for generating instruction information pertaining to image-processing to be performed on an image input signal; an image signal transmission unit for transmitting the instruction information to the image processing device; a corrected signal reception unit for receiving a corrected image input signal obtained through image-processing performed by the image processing device on the basis of the instruction information; and a display signal output unit for outputting an image output signal based on the corrected image input signal, to an object where an image is to be displayed. The image processing device receives the image input signal connected through the network and performs image-processing on the image input signal according to the instruction information.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: June 9, 2020
    Assignee: Maxell, Ltd.
    Inventors: Keisuke Inata, Yuusuke Yatabe, Nobuaki Kabuto, Nobuhiro Fukuda, Mitsuo Nakajima
  • Patent number: 10659747
    Abstract: An object is to obtain a visibility-improved video while more favorably maintaining a color rendering property in a video display device. To achieve the object, a video input unit, a video correcting unit that performs video correction on a video input by the video input unit, and a video display unit that displays the video corrected by the video correcting unit are included, and the video correcting unit is configured to perform local luminance correction on the video input by the video input unit, acquire a correction intensity for each part of the local luminance correction, and perform local saturation correction based on the correction intensity.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: May 19, 2020
    Assignee: MAXELL, LTD.
    Inventors: Kazuhiko Tanaka, Mitsuo Nakajima, Nobuhiro Fukuda, Haruhiko Higuchi
  • Publication number: 20200137370
    Abstract: An object is to obtain a visibility-improved video while more favorably maintaining a color rendering property in a video display device. To achieve the object, a video input unit, a video correcting unit that performs video correction on a video input by the video input unit, and a video display unit that displays the video corrected by the video correcting unit are included, and the video correcting unit is configured to perform local luminance correction on the video input by the video input unit, acquire a correction intensity for each part of the local luminance correction, and perform local saturation correction based on the correction intensity.
    Type: Application
    Filed: March 15, 2017
    Publication date: April 30, 2020
    Applicant: Maxell, Ltd.
    Inventors: Kazuhiko TANAKA, Mitsuo NAKAJIMA, Nobuhiro FUKUDA, Haruhiko HIGUCHI
  • Patent number: 10582171
    Abstract: A display system includes: a video display apparatus; and a mobile terminal that communicate with each other. The video display apparatus includes: a measurement pattern generator that generates a plurality of measurement patterns; a projection unit that projects the measurement patterns; a first transceiver that communicates with the mobile terminal to receive information regarding distortion correction of video; and a distortion corrector that corrects the distortion. The mobile terminal includes: a camera unit that photographs the projected measurement patterns; a controller that generates the distortion correction information based on the photographed measurement patterns; and a second transceiver that communicates with the first transceiver to transmit the distortion correction information to the video display apparatus. The measurement pattern generator adds a common pattern to each measurement pattern, which indicates a reference position of each of the measurement patterns.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: March 3, 2020
    Assignee: MAXELL, LTD.
    Inventors: Mitsuo Nakajima, Kazuhiko Tanaka, Haruhiko Higuchi
  • Publication number: 20200007837
    Abstract: A display system includes: a video display apparatus; and a mobile terminal that communicate with each other. The video display apparatus includes: a measurement pattern generator that generates a plurality of measurement patterns; a projection unit that projects the measurement patterns; a first transceiver that communicates with the mobile terminal to receive information regarding distortion correction of video; and a distortion corrector that corrects the distortion. The mobile terminal includes: a camera unit that photographs the projected measurement patterns; a controller that generates the distortion correction information based on the photographed measurement patterns; and a second transceiver that communicates with the first transceiver to transmit the distortion correction information to the video display apparatus. The measurement pattern generator adds a common pattern to each measurement pattern, which indicates a reference position of each of the measurement patterns.
    Type: Application
    Filed: September 13, 2019
    Publication date: January 2, 2020
    Applicant: MAXELL, LTD.
    Inventors: Mitsuo NAKAJIMA, Kazuhiko TANAKA, Haruhiko HIGUCHI
  • Publication number: 20190394434
    Abstract: An object is to provide a technology for correcting color of a projected video more suitably. In order to solve the above-described object, a configuration includes a video projector configured to display a plurality of colors in time division and project a video to be displayed, and a color corrector configured to perform color correction on a projected video from the video projector. In the configuration, the projected video projected by the video projector is imaged by an internal imaging apparatus or an external imaging apparatus connected by wire or wireless connection, and the color corrector performs the color correction on the basis of a video corresponding to time division one period of the projected video detected from the imaged image or color information of the video corresponding to N times period of time division one period.
    Type: Application
    Filed: February 3, 2017
    Publication date: December 26, 2019
    Inventors: Haruhiko HIGUCHI, Kazuhiko TANAKA, Mitsuo NAKAJIMA
  • Patent number: 10511823
    Abstract: Even when a watching position or a watching direction of a viewer for a video changes, video display with favorable visibility is obtained. A video display apparatus that receives an input of a video input signal and that displays a video based on the video input signal includes a viewer detection unit that detects a positional relation between a screen on which the video is displayed and a viewer who watches the video and that generates viewer position information including the detection result, an image processing unit that executes image correction processing for a correction region which is such a partial region of an image based on the video input signal as being set in correspondence with viewer position information, and a video display unit that displays, on the screen, a video based on a corrected video signal having been subjected to the image correction processing.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: December 17, 2019
    Assignee: MAXELL, LTD.
    Inventors: Mitsuo Nakajima, Nobuhiro Fukuda, Kazuhiko Tanaka, Nobuaki Kabuto
  • Patent number: 10455204
    Abstract: A display system includes: a video display apparatus; and a mobile terminal that communicate with each other. The video display apparatus includes: a measurement pattern generator that generates a plurality of measurement patterns; a projection unit that projects the measurement patterns; a first transceiver that communicates with the mobile terminal to receive information regarding distortion correction of video; and a distortion corrector that corrects the distortion. The mobile terminal includes: a camera unit that photographs the projected measurement patterns; a controller that generates the distortion correction information based on the photographed measurement patterns; and a second transceiver that communicates with the first transceiver to transmit the distortion correction information to the video display apparatus. The measurement pattern generator adds a common pattern to each measurement pattern, which indicates a reference position of each of the measurement patterns.
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: October 22, 2019
    Assignee: MAXELL, LTD.
    Inventors: Mitsuo Nakajima, Kazuhiko Tanaka, Haruhiko Higuchi
  • Patent number: 10449900
    Abstract: A video display system performs a video conversion process on a video of a camera mounted on a vehicle and displays a resulting video, and includes a plurality of cameras, a detecting unit that detects an object of interest around the vehicle based on information or the like acquired through the plurality of cameras, other sensors, or a network, a transforming/synthesizing unit that transforms and synthesizes the videos photographed by the plurality of cameras using a shape of a virtual projection plane, a virtual viewpoint, and a synthesis method which are decided according to position information of the object of interest detected by the detecting unit, and a display unit that displays the video that is transformed and synthesized by the transforming/synthesizing unit.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: October 22, 2019
    Assignee: CLARION, CO., LTD.
    Inventors: Haruhiko Higuchi, Kenta Takanohashi, Mitsuo Nakajima, Hidenori Sakaniwa, Yoshitaka Uchida, Hiroyuki Nakamura, Katsuo Onozaki, Takayuki Shioya
  • Patent number: 10354358
    Abstract: An image generation device performs coordinate transformation, based on a coordinate transformation table, to a two-dimensional first image having a span in a horizontal direction and a vertical direction and acquired by overlooking and imaging an object from a first viewpoint at a first depression angle, and generates and outputs a second image which was obtained by overlooking the object from a second viewpoint which is different from the first viewpoint at a second depression angle which is different from the first depression angle. The coordinate transformation table is a table for transforming coordinates of a plurality of first selected pixels selected from a plurality of first pixels constituting the first image into coordinates of second selected pixels corresponding to a plurality of second pixels constituting the second image.
    Type: Grant
    Filed: November 27, 2015
    Date of Patent: July 16, 2019
    Assignee: CLARION CO., LTD.
    Inventors: Haruhiko Higuchi, Mitsuo Nakajima, Katsuo Onozaki, Yoshitaka Uchida, Takayuki Shioya
  • Publication number: 20190110033
    Abstract: A display system includes: a video display apparatus; and a mobile terminal that communicate with each other. The video display apparatus includes: a measurement pattern generator that generates a plurality of measurement patterns; a projection unit that projects the measurement patterns; a first transceiver that communicates with the mobile terminal to receive information regarding distortion correction of video; and a distortion corrector that corrects the distortion. The mobile terminal includes: a camera unit that photographs the projected measurement patterns; a controller that generates the distortion correction information based on the photographed measurement patterns; and a second transceiver that communicates with the first transceiver to transmit the distortion correction information to the video display apparatus. The measurement pattern generator adds a common pattern to each measurement pattern, which indicates a reference position of each of the measurement patterns.
    Type: Application
    Filed: April 12, 2016
    Publication date: April 11, 2019
    Applicant: MAXELL, LTD.
    Inventors: Mitsuo NAKAJIMA, Kazuhiko TANAKA, Haruhiko HIGUCHI