Patents by Inventor Keiichiro Ishihara

Keiichiro Ishihara 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: 9454032
    Abstract: In order to prevent light leakage between adjacent pixels or prevent color mixture, a liquid crystal display device includes: a TFT substrate having a pixel in which a pixel electrode and a TFT are formed; a counter substrate in which a color filter is formed corresponding to the pixel, a black matrix is formed between each of the color filters, and an overcoat film is formed so as to cover the color filter; and a liquid crystal sandwiched between the TFT substrate to the counter substrate. When seen from a direction perpendicular to the main surface of the counter substrate, an insertion material with a refractive index different from the refractive index of the overcoat film is formed in the layer of the overcoat film at a position corresponding to the black matrix. The refractive index of the insertion material is different from the refractive index of the liquid crystal.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: September 27, 2016
    Assignee: JAPAN DISPLAY INC.
    Inventor: Keiichiro Ishihara
  • Patent number: 9453961
    Abstract: An image pickup apparatus includes an imaging optical system; an image pickup device; and an optical fiber bundle constituted by plural optical fibers configured to guide light from the imaging optical system to the image pickup device. A light incident surface of the optical fiber bundle is concave with respect to the imaging optical system. An optical fiber distant from an optical axis of the imaging optical system satisfies: ? + sin - 1 ? [ sin ? ( ? - ? ) N ? ? 1 ] - cos - 1 ? ( N ? ? 2 N ? ? 1 ) ? ? < ? where ? is an inclination angle of the optical fiber with respect to the optical axis, ? is an inclination angle of the light incident surface with respect to the optical axis, ? is an angle, with respect to the optical axis, of a principal ray from the imaging optical system incident on the optical fiber, N1 is a refractive index of a core of the optical fiber, and N2 is a refractive index of a clad of the optical fiber.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: September 27, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Keiichiro Ishihara
  • Publication number: 20160252729
    Abstract: A display control apparatus includes: a head mounted display information acquisition block configured to acquire information .indicative of a position of a head mounted display worn on a head of a user; an input apparatus information acquisition block configured to acquire information indicative of a position of an input apparatus for use by the user; an instruction input acquisition block configured to acquire information indicative of an instruction entered in the input apparatus; and an image generation block configured to generate an image to be displayed on the head mounted display on a basis of an instruction acquired by the instruction input acquisition block. The image generation block displays an image of the input apparatus at a position in the image determined on a basis of a relative position with the head mounted display of the input apparatus.
    Type: Application
    Filed: February 9, 2016
    Publication date: September 1, 2016
    Inventors: Nicolas DOUCET, Yutaka YOKOKAWA, Masafumi NODA, Takumi YOSHIDA, Keiichiro ISHIHARA, Gento MORITA, Yuki MIYAMAE, Ngo Tuyen THIBAUD, Kazutomo SASAKI
  • Patent number: 9417429
    Abstract: An image pick-up apparatus includes an imaging optical system including a plurality of lenses and a diaphragm arranged between the lenses, the imaging optical system forming an image on an image surface; and an image sensor that detects the image formed on the image surface. The imaging optical system includes a front lens group on an object side with respect to the diaphragm, and a rear lens group on the image surface side with respect to the diaphragm. A lens surface having the highest power in the front lens group and a lens surface having the highest power in the rear lens group are concentric surfaces. The front lens group includes a plano-concave lens whose light-exiting-side surface has a concave surface and whose light-incident-side surface has power ?r that satisfies the following expression: - 0.05 ? ? ? ? r ? ? ? o ? 0.05 where ?o is the power of the entire imaging optical system.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: August 16, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Keiichiro Ishihara
  • Patent number: 9398218
    Abstract: To reduce the difference among a plurality of images acquired due to an object shake or hand shake. An image capturing apparatus 10 includes an imaging optical system 11 and an image sensor 14 that acquires an image of light coming from the imaging optical system 11. The imaging optical system 11 has an aperture stop 12 including a first aperture and a second aperture. The image sensor 11 has first pixels and second pixels. The central axis of the first aperture and the central axis of the second aperture are aligned with each other. The first aperture has a first optical filter that codes light passing therethrough with a first code. The first pixels receive first coded light coded with the first code. The second pixels do not receive the first coded light and receive light other than the first coded light.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: July 19, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Keiichiro Ishihara
  • Patent number: 9398202
    Abstract: An imaging device includes an imaging optical system, an image sensor, and an optical fiber bundle including optical fibers to guide light from the system to the sensor. The optical fiber bundle includes an optical fibers first and second pair, each pair having two optical fibers that are adjacent in a meridional direction. In the first and second pair of optical fibers, a first value, which is a value representing a ratio of a distance component in the meridional direction between the optical fibers centers along a light-exit surface to a distance component in the meridional direction between optical fibers centers along a light-incident surface, is greater than one. The optical fibers second pair is located farther from an optical system optical axis than the optical fibers first pair. The first value in the optical fibers second pair is greater than the first value in the optical fibers first pair.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: July 19, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Keiichiro Ishihara
  • Publication number: 20160163056
    Abstract: A depth calculation device for calculating depth information on an object from captured first image and second image with different blur, the depth calculation device comprising: an extraction unit configured to extract a first frequency component and a second frequency component from each of the first image and the second image, the first frequency component being a component of a first frequency band, the second frequency component being a component of a second frequency band, the second frequency band being lower than the first frequency band; and a depth calculation unit configured to calculate the depth information from the frequency components extracted by the extraction unit.
    Type: Application
    Filed: February 1, 2016
    Publication date: June 9, 2016
    Inventor: Keiichiro Ishihara
  • Publication number: 20160163066
    Abstract: An image processing device extracts a similar color region from an image, based on at least a difference between a reference hue angle calculated based on a hue angle of pixels or small regions within a specific region of the image and the hue angle within the specific region, and a color difference between reference color space coordinates calculated based on color space coordinates of the pixels or small regions within the specific region and the color space coordinates within the specific region.
    Type: Application
    Filed: July 8, 2014
    Publication date: June 9, 2016
    Inventor: Keiichiro Ishihara
  • Patent number: 9361680
    Abstract: An image processing apparatus comprising: an image acquisition unit configured to acquire an image; a depth map acquisition unit configured to acquire a depth map corresponding to the image; a refinement unit configured to detect a saliency region from the image and to refine the depth map on the basis of the saliency region, the saliency region being a region on which a person tends to focus; and an image processing unit configured to apply image processing to the image using the depth map refined by the refinement unit.
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: June 7, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takahiro Takahashi, Keiichiro Ishihara, Satoru Komatsu, Shin Tanaka
  • Publication number: 20160127648
    Abstract: A processing device which obtains distance information of a subject, including: a calculation unit configured to calculate the distance information of the subject from a difference in blur degree of a plurality of images photographed by an imaging optical system; a correcting unit configured to correct the distance information using correction data in accordance with an image height in the imaging optical system; and an extraction unit configured to extract at least one frequency component from each of the plurality of images, wherein the calculation unit calculates the distance information from a difference in blur degree in the plurality of images in the at least one frequency component; and the correcting unit corrects the distance information using correction data in accordance with an image height in the at least one frequency component.
    Type: Application
    Filed: January 12, 2016
    Publication date: May 5, 2016
    Inventor: Keiichiro Ishihara
  • Patent number: 9299151
    Abstract: A depth calculation device for calculating depth information on an object from captured first image and second image with different blur, the depth calculation device comprising: an extraction unit configured to extract a first frequency component and a second frequency component from each of the first image and the second image, the first frequency component being a component of a first frequency band, the second frequency component being a component of a second frequency band, the second frequency band being lower than the first frequency band; and a depth calculation unit configured to calculate the depth information from the frequency components extracted by the extraction unit.
    Type: Grant
    Filed: July 30, 2014
    Date of Patent: March 29, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Keiichiro Ishihara
  • Publication number: 20160080727
    Abstract: A depth measurement apparatus for calculating depth information on an object, using one color image, including: a selection unit adapted to select, from a plurality of color planes of the color image, at least two color planes with different image formation positions; an adjusting unit adapted to adjust a luminance difference between the selected color planes; and a calculation unit adapted to calculate the depth information using a difference in blur between the adjusted color planes.
    Type: Application
    Filed: September 4, 2015
    Publication date: March 17, 2016
    Inventors: Satoru Komatsu, Keiichiro Ishihara
  • Patent number: 9259646
    Abstract: An object control device includes an object of interest specifying unit configured to specify an object of interest to obtain position information on the object of interest, an obstacle determining unit configured to determine whether there is an obstacle between the object of interest and the object, and a time measuring unit configured to measure a period after determining that there is the obstacle, and a holding unit configured to hold position information of the object of interest when the period reaches a predetermined period, and an object action control unit configured to control a direction of a part of the object, based on the position information obtained by the object of interest specifying unit before the period reaches the predetermined period, and based on the position information on the object of interest held in the holding unit after the period reaches the predetermined period.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: February 16, 2016
    Assignees: SONY CORPORATION, SONY COMPUTER ENTERTAINMENT INC.
    Inventors: Masashi Kudo, Fumito Ueda, Keiichiro Ishihara, Takahisa Suzuki, Yui Sasajima, Junichi Hosono, Takeshi Nakagawa
  • Patent number: 9264606
    Abstract: A processing device which obtains distance information of a subject, including: a calculation unit configured to calculate the distance information of the subject from a difference in blur degree of a plurality of images photographed by an imaging optical system; a correcting unit configured to correct the distance information using correction data in accordance with an image height in the imaging optical system; and an extraction unit configured to extract at least one frequency component from each of the plurality of images, wherein the calculation unit calculates the distance information from a difference in blur degree in the plurality of images in the at least one frequency component; and the correcting unit corrects the distance information using correction data in accordance with an image height in the at least one frequency component.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: February 16, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Keiichiro Ishihara
  • Publication number: 20150373240
    Abstract: An imaging device includes an imaging optical system, an image sensor, and an optical fiber bundle including optical fibers to guide light from the system to the sensor. The optical fiber bundle includes an optical fibers first and second pair, each pair having two optical fibers that are adjacent in a meridional direction. In the first and second pair of optical fibers, a first value, which is a value representing a ratio of a distance component in the meridional direction between the optical fibers centers along a light-exit surface to a distance component in the meridional direction between optical fibers centers along a light-incident surface, is greater than one. The optical fibers second pair is located farther from an optical system optical axis than the optical fibers first pair. The first value in the optical fibers second pair is greater than the first value in the optical fibers first pair.
    Type: Application
    Filed: June 15, 2015
    Publication date: December 24, 2015
    Inventor: Keiichiro Ishihara
  • Publication number: 20150370011
    Abstract: An image pickup apparatus includes an imaging optical system; an image pickup device; and an optical fiber bundle constituted by plural optical fibers configured to guide light from the imaging optical system to the image pickup device. A light incident surface of the optical fiber bundle is concave with respect to the imaging optical system. An optical fiber distant from an optical axis of the imaging optical system satisfies: ? + sin - 1 ? [ sin ? ( ? - ? ) N ? ? 1 ] - cos - 1 ? ( N ? ? 2 N ? ? 1 ) ? ? < ? where ? is an inclination angle of the optical fiber with respect to the optical axis, ? is an inclination angle of the light incident surface with respect to the optical axis, ? is an angle, with respect to the optical axis, of a principal ray from the imaging optical system incident on the optical fiber, N1 is a refractive index of a core of the optical fiber, and N2 is a refractive index of a clad of the optical fiber.
    Type: Application
    Filed: June 16, 2015
    Publication date: December 24, 2015
    Inventor: Keiichiro Ishihara
  • Publication number: 20150370012
    Abstract: An imaging apparatus includes an imaging optical system, an imaging element, and an optical fiber bundle composed of a plurality of optical fibers configured to guide light from the imaging optical system to the imaging element. Each of the optical fibers includes a core portion and a clad portion around the core portion. A diameter of the core portion on a light emit face of the optical fibers is larger than a diameter of the core portion on a light incident face. An optical fiber not parallel to an optical axis of the imaging optical system satisfies the following expression: 0??i<?i where ?i represents an inclination angle of the optical fiber with respect to the optical axis on the light incident face, and ?i represents an angle of a principal ray incident on the optical fiber from the imaging optical system with respect to the optical axis.
    Type: Application
    Filed: June 17, 2015
    Publication date: December 24, 2015
    Inventor: Keiichiro Ishihara
  • Publication number: 20150370037
    Abstract: An image pick-up apparatus includes an imaging optical system including a plurality of lenses and a diaphragm arranged between the lenses, the imaging optical system forming an image on an image surface; and an image sensor that detects the image formed on the image surface. The imaging optical system includes a front lens group on an object side with respect to the diaphragm, and a rear lens group on the image surface side with respect to the diaphragm. A lens surface having the highest power in the front lens group and a lens surface having the highest power in the rear lens group are concentric surfaces. The front lens group includes a plano-concave lens whose light-exiting-side surface has a concave surface and whose light-incident-side surface has power ?r that satisfies the following expression: - 0.05 ? ? ? ? r ? ? ? o ? 0.05 where ?o is the power of the entire imaging optical system.
    Type: Application
    Filed: June 17, 2015
    Publication date: December 24, 2015
    Inventor: Keiichiro Ishihara
  • Publication number: 20150369589
    Abstract: A positional shift amount measurement method of measuring a positional shift amount of optical fibers in an optical fiber bundle formed by binding a plurality of optical fibers is provided. The positional shift amount measurement method includes: an image acquiring step of capturing an image of a test chart having a cyclic pattern in at least a first direction via the optical fiber bundle to acquire a captured image; a phase calculating step of calculating phases of respective pixels of the captured image from the cyclic pattern in the captured image; and a positional shift amount calculating step of calculating a pixel shift amount of the captured image resulting from a positional shift, in the first direction, of the optical fibers in units of sub pixels, based on a phase shift of pixels of the captured image arranged in a second direction vertical to the first direction.
    Type: Application
    Filed: June 12, 2015
    Publication date: December 24, 2015
    Inventor: Keiichiro Ishihara
  • Publication number: 20150362793
    Abstract: In order to prevent light leakage between adjacent pixels or prevent color mixture, a liquid crystal display device includes: a TFT substrate having a pixel in which a pixel electrode and a TFT are formed; a counter substrate in which a color filter is formed corresponding to the pixel, a black matrix is formed between each of the color filters, and an overcoat film is formed so as to cover the color filter; and a liquid crystal sandwiched between the TFT substrate to the counter substrate. When seen from a direction perpendicular to the main surface of the counter substrate, an insertion material with a refractive index different from the refractive index of the overcoat film is formed in the layer of the overcoat film at a position corresponding to the black matrix. The refractive index of the insertion material is different from the refractive index of the liquid crystal.
    Type: Application
    Filed: June 15, 2015
    Publication date: December 17, 2015
    Inventor: Keiichiro ISHIHARA