Patents by Inventor Katsuyuki Matsui

Katsuyuki Matsui 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: 11862118
    Abstract: A display data processing device performs color adjustment on gradation values of pixels of a frame image of an input video signal and outputs the adjusted gradation values to a display device. The device includes a first gamma correction unit configured to set the gradation value as the first input gradation value and to convert the first input gradation value into the first corrected gradation value. The device includes a video gain correction unit configured to perform color adjustment on the first corrected gradation value according to video gain correction and to output the result as a video gain corrected gradation value. The device includes a second gamma correction unit configured to set the video gain corrected gradation value as the second input gradation value and to convert the second input gradation value into the second corrected gradation value.
    Type: Grant
    Filed: December 23, 2022
    Date of Patent: January 2, 2024
    Assignee: Sharp NEC Display Solutions, Ltd.
    Inventor: Katsuyuki Matsui
  • Publication number: 20230147884
    Abstract: A display data processing device performs color adjustment on gradation values of pixels of a frame image of an input video signal and outputs the adjusted gradation values to a display device. The device includes a first gamma correction unit configured to set the gradation value as the first input gradation value and to convert the first input gradation value into the first corrected gradation value. The device includes a video gain correction unit configured to perform color adjustment on the first corrected gradation value according to video gain correction and to output the result as a video gain corrected gradation value. The device includes a second gamma correction unit configured to set the video gain corrected gradation value as the second input gradation value and to convert the second input gradation value into the second corrected gradation value.
    Type: Application
    Filed: December 23, 2022
    Publication date: May 11, 2023
    Inventor: Katsuyuki MATSUI
  • Publication number: 20210241717
    Abstract: According to the present invention, there is provided an image display system that comprises a composite display screen by adjacently arranging display screens of a plurality of display devices using predetermined setting information, in which each of the display devices includes a color adjusting unit that performs adjustment of colors of each corner area in each of the display screens, and the image display system includes a screen display control unit configured to output environment correction data for adjusting color difference between the corresponding display screens to the color adjusting units.
    Type: Application
    Filed: April 21, 2021
    Publication date: August 5, 2021
    Inventor: Katsuyuki MATSUI
  • Patent number: 11069310
    Abstract: The present invention is provided with a correction data generation unit that generates third correction data that is used for correcting display unevenness of the image display apparatus on the basis of first correction data that is used for correcting display unevenness resulting from the image display apparatus itself and second correction data that is used for correcting display unevenness resulting from an environment set for the image display apparatus, and a correction unit that corrects an image signal using the third correction data.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: July 20, 2021
    Assignee: SHARP NEC DISPLAY SOLUTIONS, LTD.
    Inventor: Katsuyuki Matsui
  • Patent number: 11011096
    Abstract: A display device is for displaying an image generated by an image processing device. The display device includes: a video decoding and input unit that receives an encoded image of a reference signal generated by the image processing device, and decodes the encoded image; a video display unit that performs image quality correction of the decoded image and displays, on a display panel, the image to which the image quality correction has been performed; and an image cut-out unit that cuts out an image at a position corresponding to the reference signal from an image to which the image quality correction has not been performed and transmits the cut out image to which the image quality correction has been performed, to the image processing device.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: May 18, 2021
    Assignee: Sharp NEC Display Solutions, Ltd.
    Inventors: Katsuyuki Matsui, Kiyomichi Fukushima
  • Publication number: 20200365100
    Abstract: The present invention is provided with a correction data generation unit that generates third correction data that is used for correcting display unevenness of the image display apparatus on the basis of first correction data that is used for correcting display unevenness resulting from the image display apparatus itself and second correction data that is used for correcting display unevenness resulting from an environment set for the image display apparatus, and a correction unit that corrects an image signal using the third correction data.
    Type: Application
    Filed: December 13, 2017
    Publication date: November 19, 2020
    Inventor: Katsuyuki MATSUI
  • Patent number: 10699656
    Abstract: A luminance adjustment device is configured to adjust the luminance of a light source of a display by controlling a drive value of the light source of the display. The luminance adjustment device is configured to calculate the luminance corresponding to the used time of the light source according to a predetermined luminance characteristic, to calculate the drive value according to the luminance, to correct and add up the used time of the light source using a cubic value of the drive value, to correct the luminance according to the predetermined luminance characteristic based on a total used time, and to thereby correct the drive value.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: June 30, 2020
    Assignee: NEC DISPLAY SOLUTIONS, LTD.
    Inventor: Katsuyuki Matsui
  • Patent number: 10594904
    Abstract: A correction coefficient calculation unit including a reference image output unit that generates a reference image, a profile receiving unit that receives image information and printing information, the image information indicating a color characteristic related to an image to be displayed on a display unit, the printing information indicating a color characteristic related to a printing device, and a reference image division unit that creates printing characteristic data that associates the reference image with the reference image that has undergone color conversion based on the printing information and the image information.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: March 17, 2020
    Assignee: NEC DISPLAY SOLUTIONS, LTD.
    Inventor: Katsuyuki Matsui
  • Publication number: 20190266969
    Abstract: A luminance adjustment device is configured to adjust the luminance of a light source of a display by controlling a drive value of the light source of the display. The luminance adjustment device is configured to calculate the luminance corresponding to the used time of the light source according to a predetermined luminance characteristic, to calculate the drive value according to the luminance, to correct and add up the used time of the light source using a cubic value of the drive value, to correct the luminance according to the predetermined luminance characteristic based on a total used time, and to thereby correct the drive value.
    Type: Application
    Filed: November 18, 2016
    Publication date: August 29, 2019
    Inventor: Katsuyuki MATSUI
  • Publication number: 20190172383
    Abstract: A display device is for displaying an image generated by an image processing device, The display device includes: a video decoding and input unit that receives an encoded image of a reference signal generated by the image processing device, and decodes the encoded image; a video display unit that performs image quality correction of the decoded image and displays, on a display panel, the image to which the image quality correction has been performed; and an image cut-out unit that cuts out an image at a position corresponding to the reference signal from an image to which the image quality correction has not been performed and transmits the cut out image to which the image quality correction has been performed, to the image processing device.
    Type: Application
    Filed: August 25, 2016
    Publication date: June 6, 2019
    Inventors: Katsuyuki MATSUI, Kiyomichi FUKUSHIMA
  • Patent number: 10304365
    Abstract: An image correction device includes: a first target unevenness characteristic calculation unit that calculates a first target unevenness characteristic based on a first uncorrected unevenness characteristic and a correction amount, the first uncorrected unevenness characteristic being an uncorrected unevenness characteristic at a first gradation, the uncorrected unevenness characteristic being a characteristic of brightness unevenness of a display panel when uncorrected, the correction amount being calculated based on a backlight drive value and a black level; a second target unevenness characteristic calculation unit that calculates a second target unevenness characteristic based on a second uncorrected unevenness characteristic and the backlight drive value, the second uncorrected unevenness characteristic being the uncorrected unevenness characteristic at a second gradation; and a correction data generation unit that generates correction data for each gradation for correcting an image signal, based on the
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: May 28, 2019
    Assignee: NEC DISPLAY SOLUTIONS, LTD.
    Inventor: Katsuyuki Matsui
  • Patent number: 10157582
    Abstract: A display device includes a video input unit that receives a video signal; a display control unit that corrects the video signal; and a display unit that has a screen on which a video according to the corrected video signal is displayed. The display device further includes a gradation correction map generation device that generates a gradation correction map which indicates a corresponding relationship between a plurality of positions on the screen and a correction value for gradation of the video signal at each of the positions; the gradation correction map generation device generates the gradation correction map according to a luminance unevenness map which indicates a corresponding relationship between the plurality of the positions and uncorrected luminance, which is luminance when correction is not performed, at each of the positions, and a second gamma characteristic which indicates a corresponding relationship between luminance at a specific position on the screen.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: December 18, 2018
    Assignee: NEC DISPLAY SOLUTIONS, LTD.
    Inventor: Katsuyuki Matsui
  • Publication number: 20180255209
    Abstract: A correction coefficient calculation unit including a reference image output unit that generates a reference image, a profile receiving unit that receives image information and printing information, the image information indicating a color characteristic related to an image to be displayed on a display unit, the printing information indicating a color characteristic related to a printing device, and a reference image division unit that creates printing characteristic data that associates the reference image with the reference image that has undergone color conversion based on the printing information and the image information.
    Type: Application
    Filed: May 7, 2018
    Publication date: September 6, 2018
    Inventor: Katsuyuki MATSUI
  • Patent number: 10000697
    Abstract: The invention relates to co-activated magnesium alumosilicate based phosphors, to a process of its preparation, the use of these phosphors in electronic and electro optical devices, such as light emitting diodes (LEDs) and solar cells and especially to illumination units comprising said magnesium alumosilicate-based phosphors.
    Type: Grant
    Filed: February 24, 2014
    Date of Patent: June 19, 2018
    Assignee: Merck Patent GmbH
    Inventors: Hiroshi Okura, Takeo Wakimoto, Katsuyuki Matsui, Noriyuki Matsuda
  • Patent number: 9992384
    Abstract: A correction coefficient calculation unit includes: a reference image output unit that generates a reference image; a profile receiving unit that receives image information and printing information, the image information indicating a color characteristic related to an image to be displayed on a display unit, the printing information indicating a color characteristic related to a printing device; and a reference image division unit that creates printing characteristic data that associates the reference image with the reference image that has undergone color conversion based on the printing information and the image information.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: June 5, 2018
    Assignee: NEC DISPLAY SOLUTIONS, LTD.
    Inventor: Katsuyuki Matsui
  • Publication number: 20180122974
    Abstract: The invention relates to a polymer film comprising an inorganic fluorescent compound and an organic fluorescent compound. The invention further relates methods for preparing such a film, and to its use as wavelength conversion film in a solar cell.
    Type: Application
    Filed: December 18, 2017
    Publication date: May 3, 2018
    Applicant: Merck Patent GmbH
    Inventors: Hiroshi OKURA, Takeo WAKIMOTO, Katsuyuki MATSUI, Noriyuki MATSUDA, Masayoshi SUZUKI, Tadashi KISHIMOTO
  • Patent number: 9953585
    Abstract: A display device includes a display which is configured to display an image; a backlight which is turned on in the rear face of the display; a storage unit which is configured to store luminance characteristics at the center of the display; an optical sensor which is configured to measure luminance in the periphery of the display; and a signal processing unit which is configured to correct the measured value measured with the optical sensor in the periphery of the display based on luminance characteristics stored in the storage unit, thus controlling the luminance of the display based on the corrected measured value.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: April 24, 2018
    Assignee: NEC DISPLAY SOLUTIONS, LTD.
    Inventors: Masatoshi Abe, Katsuyuki Matsui
  • Patent number: 9928784
    Abstract: A gradation correction map generating unit generates a gradation correction map based on a brightness unevenness map, a rotation unevenness map, and a second gamma characteristic. The brightness unevenness map indicates a correspondence relation between a plurality of positions in a screen of a display unit, and uncorrected brightness values, the uncorrected brightness values being brightness values at time of performing no correction when the display unit is installed at a predetermined angle. The rotation unevenness map indicates a correspondence relation between the plurality of positions or other plurality of positions, and differences in brightness values corresponding to a rotation angle of the display unit. The second gamma characteristic indicates a correspondence relation between a brightness value at a specific position in the screen, and a gradation of an image signal.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: March 27, 2018
    Assignee: NEC DISPLAY SOLUTIONS, LTD.
    Inventor: Katsuyuki Matsui
  • Patent number: 9916811
    Abstract: A color conversion data generation device includes: an acquisition unit that acquires end point correction values for correcting a color of at least one end point of a RGB color space; an end point color correction value generation unit that corrects the color of the at least one end point using the acquired end point correction values, to generate end point color correction values; a normalization unit that normalizes an intermediate color in the RGB color space using a normalization coefficient; an interpolation unit that interpolates the normalized intermediate color using the generated end point color correction values by means of same interpolation characteristic as that of a 3D LUT circuit, to generate temporary correction values; and an inverse normalization unit that inverse-normalizes the generated temporary correction values using an inverse normalization coefficient defined according to the normalization coefficient, to generate correction values of the intermediate color.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: March 13, 2018
    Assignee: NEC DISPLAY SOLUTIONS, LTD.
    Inventor: Katsuyuki Matsui
  • Patent number: 9907133
    Abstract: A backlight device includes a plurality of light sources that emit light of different colors from each other, a plurality of color sensors that receive mixed-color light including light emitted from the light sources to detect light emission states of the light sources, a temperature sensor that measures a temperature in a proximity of the plurality of light sources, a brightness conversion unit that separates the mixed-color light to obtain a detection value for each of the light sources by converting values indicating the detected light emission states, and a calculation unit that corrects the obtained detection value by using information indicating a relationship between the measured temperature and a correction value, the calculation unit determining drive values for the light sources based on the corrected detection value.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: February 27, 2018
    Assignee: NEC DISPLAY SOLUTIONS, LTD.
    Inventor: Katsuyuki Matsui