Patents by Inventor Hideaki Kasahara

Hideaki Kasahara 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: 20220197011
    Abstract: Variable wavelength filter including two reflective films facing each other and an actuator group for changing a relative position between the two reflective films is controlled. The actuator group includes a first actuator that is driven according to a target distance between the two reflective films and a second actuator in which a feedback control is performed according to the target distance and a detection value of a distance between the two reflective films. Control method includes (a) receiving a new target distance between the two reflective films, (b) driving the first actuator according to the new target distance, and (c) performing the feedback control on the second actuator according to the new target distance and the detection value of the distance between the two reflective films. When a predetermined condition is satisfied, after start of the (b), and after elapse of a predetermined inhibition time, the (c) is started.
    Type: Application
    Filed: December 21, 2021
    Publication date: June 23, 2022
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Hideaki KASAHARA, Nozomu HIROKUBO
  • Patent number: 10871446
    Abstract: A measurement device includes a plurality of light sources configured to emit light toward a measurement object, and having a same emission spectrum, a spectroscopic measurement section configured to perform spectroscopic measurement on the light reflected by the measurement object, a light source switching section configured to switch a combination of the light sources to be put on or off out of the plurality of light sources, and an arithmetic section configured to calculate the spectral reflectivity of the measurement object based on a spectroscopic measurement result obtained by the spectroscopic measurement section when putting on or off the plurality of light sources with a plurality of the combinations.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: December 22, 2020
    Inventor: Hideaki Kasahara
  • Publication number: 20200200607
    Abstract: A spectral filter module includes a spectral filter that splits light having a wavelength corresponding to an input drive voltage from incident light and outputs the light, a drive unit that outputs the drive voltage based on an input wavelength command value, and a drive controller that outputs the wavelength command value and changes the wavelength command value every time a trigger signal is input from the outside.
    Type: Application
    Filed: December 19, 2019
    Publication date: June 25, 2020
    Inventors: Akira SANO, Hideaki KASAHARA
  • Patent number: 10677654
    Abstract: A spectroscopic camera includes a wavelength variable interference filter, and an image sensor that receives light which is transmitted through the wavelength variable interference filter. Measurement is implemented a plurality of times by causing measurement light to be incident to the wavelength variable interference filter and changing the wavelength of light that is transmitted by the wavelength variable interference filter. Reflectance based on the intensity of light when a first pixel of the image sensor receives light of a target wavelength, is predicted in the respective plurality of repetitions of measurement on the basis of a light reception central wavelength of light that the first pixel receives, and reflectance that is calculated on the basis of the intensity of light that is received by the first pixel.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: June 9, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Hideaki Kasahara, Masashi Kanai
  • Patent number: 10530963
    Abstract: A shading correction device includes a reference acquirer that acquires a reference pixel value W in a captured image of a color measurement reference object, a target pixel value acquirer that acquires a pixel value S in a captured image of a measurement target, a bit shift value acquirer that acquires a bit shift value k2 based on the reference pixel value W, a lookup table storing a variable G2 (=2k1/W>>k2) corresponding to W>>k2, and a calculator that reads the variable G2 corresponding to the reference pixel value W and the bit shift value k2 from the lookup table and calculates a shading correction value Rdec of each pixel in the captured image of the measurement target using Expression (5): R dec = ( F · G 2 ) ? ( k ? ? 1 + k ? ? 2 ) + B ? ? where ? ? F = S · ( A - B ) + { W ? 1 } , G 2 = 2 k ? ? 1 W ? k ? ? 2 , ( 5 ) and A, B and k1 are integer constants.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: January 7, 2020
    Assignee: Seiko Epson Corporation
    Inventor: Hideaki Kasahara
  • Publication number: 20200003686
    Abstract: A measurement device includes a plurality of light sources configured to emit light toward a measurement object, and having a same emission spectrum, a spectroscopic measurement section configured to perform spectroscopic measurement on the light reflected by the measurement object, a light source switching section configured to switch a combination of the light sources to be put on or off out of the plurality of light sources, and an arithmetic section configured to calculate the spectral reflectivity of the measurement object based on a spectroscopic measurement result obtained by the spectroscopic measurement section when putting on or off the plurality of light sources with a plurality of the combinations.
    Type: Application
    Filed: June 27, 2019
    Publication date: January 2, 2020
    Inventor: Hideaki KASAHARA
  • Patent number: 10466103
    Abstract: A spectroscopic camera includes a wavelength variable interference filter, and an image sensor that receives light which is transmitted through the wavelength variable interference filter. Measurement is implemented a plurality of times by causing measurement light to be incident to the wavelength variable interference filter and changing the wavelength of light that is transmitted by the wavelength variable interference filter. Reflectance based on the intensity of light when a first pixel of the image sensor receives light of a target wavelength, is predicted in the respective plurality of repetitions of measurement on the basis of a light reception central wavelength of light that the first pixel receives, and reflectance that is calculated on the basis of the intensity of light that is received by the first pixel.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: November 5, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Hideaki Kasahara, Masashi Kanai
  • Publication number: 20190003889
    Abstract: A spectroscopic camera includes a wavelength variable interference filter, and an image sensor that receives light which is transmitted through the wavelength variable interference filter. Measurement is implemented a plurality of times by causing measurement light to be incident to the wavelength variable interference filter and changing the wavelength of light that is transmitted by the wavelength variable interference filter. Reflectance based on the intensity of light when a first pixel of the image sensor receives light of a target wavelength, is predicted in the respective plurality of repetitions of measurement on the basis of a light reception central wavelength of light that the first pixel receives, and reflectance that is calculated on the basis of the intensity of light that is received by the first pixel.
    Type: Application
    Filed: August 21, 2018
    Publication date: January 3, 2019
    Inventors: Hideaki KASAHARA, Masashi KANAI
  • Publication number: 20190003890
    Abstract: A spectroscopic camera includes a wavelength variable interference filter, and an image sensor that receives light which is transmitted through the wavelength variable interference filter. Measurement is implemented a plurality of times by causing measurement light to be incident to the wavelength variable interference filter and changing the wavelength of light that is transmitted by the wavelength variable interference filter. Reflectance based on the intensity of light when a first pixel of the image sensor receives light of a target wavelength, is predicted in the respective plurality of repetitions of measurement on the basis of a light reception central wavelength of light that the first pixel receives, and reflectance that is calculated on the basis of the intensity of light that is received by the first pixel.
    Type: Application
    Filed: August 21, 2018
    Publication date: January 3, 2019
    Inventors: Hideaki KASAHARA, Masashi KANAI
  • Patent number: 10101205
    Abstract: A spectroscopic camera includes a wavelength variable interference filter, and an image sensor that receives light which is transmitted through the wavelength variable interference filter. Measurement is implemented a plurality of times by causing measurement light to be incident to the wavelength variable interference filter and changing the wavelength of light that is transmitted by the wavelength variable interference filter. Reflectance based on the intensity of light when a first pixel of the image sensor receives light of a target wavelength, is predicted in the respective plurality of repetitions of measurement on the basis of a light reception central wavelength of light that the first pixel receives, and reflectance that is calculated on the basis of the intensity of light that is received by the first pixel.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: October 16, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Hideaki Kasahara, Masashi Kanai
  • Publication number: 20180152597
    Abstract: A shading correction device includes a reference acquirer that acquires a reference pixel value W in a captured image of a color measurement reference object, a target pixel value acquirer that acquires a pixel value S in a captured image of a measurement target, a bit shift value acquirer that acquires a bit shift value k2 based on the reference pixel value W, a lookup table storing a variable G2 (=2k1/W>>k2) corresponding to W>>k2, and a calculator that reads the variable G2 corresponding to the reference pixel value W and the bit shift value k2 from the lookup table and calculates a shading correction value Rdec of each pixel in the captured image of the measurement target using Expression (5): R dec = ( F · G 2 ) ? ( k ? ? 1 + k ? ? 2 ) + B ? ? where ? ? F = S · ( A - B ) + { W ? 1 } , G 2 = 2 k ? ? 1 W ? k ? ? 2 , ( 5 ) and A, B and k1 are integer constants.
    Type: Application
    Filed: November 28, 2017
    Publication date: May 31, 2018
    Inventor: Hideaki KASAHARA
  • Patent number: 9724950
    Abstract: There is provided a printer including an imaging device that captures an image of a medium, and a control unit that controls an ink discharge amount of a printing unit that discharges ink to form an image. The control unit acquires a captured image of a test pattern which is obtained by an imaging device and is printed by the printing unit, and controls an ink discharge amount on the basis of a grayscale value of a first region including an outer peripheral edge of the test pattern and a grayscale value of a second region within the test pattern.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: August 8, 2017
    Assignee: Seiko Epson Corporation
    Inventor: Hideaki Kasahara
  • Publication number: 20170122807
    Abstract: A spectroscopic camera includes a wavelength variable interference filter, and an image sensor that receives light which is transmitted through the wavelength variable interference filter. Measurement is implemented a plurality of times by causing measurement light to be incident to the wavelength variable interference filter and changing the wavelength of light that is transmitted by the wavelength variable interference filter. Reflectance based on the intensity of light when a first pixel of the image sensor receives light of a target wavelength, is predicted in the respective plurality of repetitions of measurement on the basis of a light reception central wavelength of light that the first pixel receives, and reflectance that is calculated on the basis of the intensity of light that is received by the first pixel.
    Type: Application
    Filed: October 13, 2016
    Publication date: May 4, 2017
    Inventors: Hideaki KASAHARA, Masashi KANAI
  • Publication number: 20170080732
    Abstract: There is provided a printer including an imaging device that captures an image of a medium, and a control unit that controls an ink discharge amount of a printing unit that discharges ink to form an image. The control unit acquires a captured image of a test pattern which is obtained by an imaging device and is printed by the printing unit, and controls an ink discharge amount on the basis of a grayscale value of a first region including an outer peripheral edge of the test pattern and a grayscale value of a second region within the test pattern.
    Type: Application
    Filed: September 16, 2016
    Publication date: March 23, 2017
    Inventor: Hideaki KASAHARA
  • Patent number: 8870665
    Abstract: A damper device including an input element to which power from a motor is transmitted; a first elastic body to which power is transmitted from the input element; a first intermediate element to which power is transmitted from the first elastic body; a second elastic body to which power is transmitted from the first intermediate element; a second intermediate element to which power is transmitted from the second elastic body; a third elastic body to which power is transmitted from the second intermediate element; and an output element to which power is transmitted from the third elastic body. A stiffness of the first elastic body is higher than a stiffness of the second elastic body.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: October 28, 2014
    Assignee: Aisin AW Co., Ltd.
    Inventors: Yoshihiro Takikawa, Hiroki Tsuji, Kazuyoshi Ito, Naohisa Momiyama, Yoichi Oi, Hideaki Kasahara, Masahiro Ishikawa
  • Patent number: 8325202
    Abstract: The present invention provides an image processing device, a color correction table generation device, a display device, an image processing method, a color correction table generation method, a color adjustment method of a display device, and an image processing program capable of color matching to preferred colors of which excessive emphasis in chroma is suppressed. There are provided a chroma limit setting section for setting a chroma limit based on a optimal color, and a color correction table generation section for generating a color correction table by making a correspondence between an input color and an output color having chroma no greater than a chroma limit. The color correction table is stored in a color correction table storage section. The color correction execution section executes color correction along the color correction table so that the projector outputs a color with chroma no greater than the chroma limit.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: December 4, 2012
    Assignee: Seiko Epson Corporation
    Inventors: Masashi Kanai, Hideaki Kasahara
  • Patent number: 8262188
    Abstract: A printing device includes a first nozzle column in which nozzles discharging liquid to a medium are arranged in a line in a predetermined direction, a second nozzle column in which nozzles discharging liquid to the medium are arranged in the predetermined direction, in which the first and second nozzle columns are arranged in a line in an intersecting direction with respect to the predetermined direction, a control portion which causes the first nozzle column and the second nozzle column to discharge the liquid to the medium while moving the first and second nozzle columns and the medium relatively to each other in a moving direction, in which the control portion forms a certain correction pattern composed of a first pattern formed by the first nozzle column and positioned on one side in the intersecting direction with respect to the moving direction and a second pattern formed by the second nozzle column and positioned on the other side in the intersecting direction with respect to the moving direction in p
    Type: Grant
    Filed: August 6, 2009
    Date of Patent: September 11, 2012
    Assignee: Seiko Epson Corporation
    Inventors: Toru Takahashi, Toru Miyamoto, Hirokazu Kasahara, Hideaki Kasahara
  • Publication number: 20120208648
    Abstract: A damper device including an input element to which power from a motor is transmitted; a first elastic body to which power is transmitted from the input element; a first intermediate element to which power is transmitted from the first elastic body; a second elastic body to which power is transmitted from the first intermediate element; a second intermediate element to which power is transmitted from the second elastic body; a third elastic body to which power is transmitted from the second intermediate element; and an output element to which power is transmitted from the third elastic body. A stiffness of the first elastic body is higher than a stiffness of the second elastic body.
    Type: Application
    Filed: February 8, 2012
    Publication date: August 16, 2012
    Applicant: AISIN AW CO., LTD.
    Inventors: Yoshihiro TAKIKAWA, Hiroki TSUJI, Kazuyoshi ITO, Naohisa MOMIYAMA, Yoichi OI, Hideaki KASAHARA, Masahiro ISHIKAWA
  • Publication number: 20120200757
    Abstract: An imaging device includes an imaging unit and a display unit. The display unit successively displays each of two or more images of images captured by the imaging unit and images cut out in one or more modes from the captured images.
    Type: Application
    Filed: February 2, 2012
    Publication date: August 9, 2012
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventor: Hideaki Kasahara
  • Publication number: 20120056895
    Abstract: The present invention provides an image processing device, a color correction table generation device, a display device, an image processing method, a color correction table generation method, a color adjustment method of a display device, and an image processing program capable of color matching to preferred colors of which excessive emphasis in chroma is suppressed. There are provided a chroma limit setting section for setting a chroma limit based on a optimal color, and a color correction table generation section for generating a color correction table by making a correspondence between an input color and an output color having chroma no greater than a chroma limit. The color correction table is stored in a color correction table storage section. The color correction execution section executes color correction along the color correction table so that the projector outputs a color with chroma no greater than the chroma limit.
    Type: Application
    Filed: September 19, 2011
    Publication date: March 8, 2012
    Applicant: Seiko Epson Corporation
    Inventors: Masashi KANAI, Hideaki Kasahara