Patents by Inventor Akihiro Shiraishi

Akihiro Shiraishi 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: 10921700
    Abstract: The projector appropriately generates white light from a laser light source and uses the white light for image display. A white light generator that generates white light from blue light and yellow light includes a dichroic mirror that is irradiated with blue light from a blue laser, a first condenser lens that focuses the blue light that has passed through the dichroic mirror, a diffusion plate that diffuses the focused blue light, a second condenser lens that focuses the blue light obtained by allowing the diffused blue light to pass through the dichroic mirror, and a phosphor that is irradiated with the focused blue light to emit yellow light; the diffusion plate is an alumina ceramic plate; the dichroic mirror has a first region that transmits one of the blue light and the yellow light and reflects the other and a second region that reflects or transmits both.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: February 16, 2021
    Assignee: MAXELL, LTD.
    Inventors: Minjoo Park, Kazuo Shikita, Chiaki Kinno, Akihiro Shiraishi, Takuya Shimizu, Hiroshi Nakamori
  • Publication number: 20210033954
    Abstract: A projector generates white light from a laser light source and uses the white light for image display. The white light generator has a rectangular light generating lens that generates excitation light of a rectangular shape from the blue light of a blue laser and a phosphor wheel, coated with a phosphor that is irradiated with the excitation light, to emit yellow light. In the phosphor wheel, a length in the vertical direction of a rectangular shape of an irradiation region is represented by v, and a length in the horizontal direction is represented by h, wherein h<v; and a center of the rectangular shape is within any one of a region having an angle of 45° or more and 135° or less and a region having an angle of 225° or more and 315° or less in the phosphor coat region of the phosphor wheel.
    Type: Application
    Filed: February 28, 2019
    Publication date: February 4, 2021
    Inventors: Hiroshi NAKAMORI, Kazuo SHIKITA, Akihiro SHIRAISHI, Chiaki KINNO, Takuya SHIMIZU, Minjoo PARK
  • Publication number: 20210000498
    Abstract: Provided is a medical device capable of easily changing a position of the device inside a biological lumen and effectively removing a cut object. The medical device for removing the object in the biological lumen has a drive shaft, a cutting portion, a first housing that accommodates the drive shaft to be rotatable, a second housing that is rotatable with respect to the first housing, and a support portion that supports the first housing and the second housing. The second housing and the support portion relatively move along an axis to restrict relative rotation of the first housing and the second housing. The support portion supports the second housing to be rotatable around the axis, and restricts a relative movement and a relative inclination of the second housing and the support portion in a direction intersecting with the axis.
    Type: Application
    Filed: September 17, 2020
    Publication date: January 7, 2021
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Mizuho SHIRAISHI, Yuichi TADA, Akihiro TAKAHASHI
  • Publication number: 20200405345
    Abstract: A medical device for removing an object in a body lumen includes a catheter and a drive device. The drive device includes a hub support portion with which a hub portion of the catheter is interlocked. The hub portion has first and second engagement portions interlocked with the hub support portion. The hub support portion includes a rotation blocking portion that is engaged with the first engagement portion to block the hub portion from rotating with respect to the hub support portion, a movement blocking portion that is engaged with the second engagement portion to block movement of the hub portion with respect to the hub support portion in an axial direction, and a releasing portion that releases a state in which a rotation of the hub portion is blocked while maintaining a state in which movement of the hub portion is blocked.
    Type: Application
    Filed: August 19, 2020
    Publication date: December 31, 2020
    Inventors: Mizuho SHIRAISHI, Akihiro TAKAHASHI
  • Publication number: 20200401030
    Abstract: A projector includes: a white light generator that uses a blue laser as a light source to generate blue light and yellow light based on the blue laser and generates white light including the generated blue light and yellow light; and an optical system that modulates light based on the white light generated by the white light generator with an image display element and projects the modulated light, wherein the white light generator includes: a dichroic mirror that is irradiated with the blue light from the blue laser as the light source; a first condenser lens that focuses blue light being reflected by or passing through the dichroic mirror; a diffusion plate that diffuses the blue light focused by the first condenser lens; a second condenser lens that focuses the blue light passing through or being reflected by the dichroic mirror; and a phosphor that emits yellow light.
    Type: Application
    Filed: December 27, 2017
    Publication date: December 24, 2020
    Inventors: Hiroshi NAKAMORI, Kazuo SHIKITA, Chiaki KINNO, Akihiro SHIRAISHI, Takuya SHIMIZU
  • Publication number: 20200341361
    Abstract: The projector appropriately generates white light from a laser light source and uses the white light for image display. A white light generator that generates white light from blue light and yellow light includes a dichroic mirror that is irradiated with blue light from a blue laser, a first condenser lens that focuses the blue light that has passed through the dichroic mirror, a diffusion plate that diffuses the focused blue light, a second condenser lens that focuses the blue light obtained by allowing the diffused blue light to pass through the dichroic mirror, and a phosphor that is irradiated with the focused blue light to emit yellow light; the diffusion plate is an alumina ceramic plate; the dichroic mirror has a first region that transmits one of the blue light and the yellow light and reflects the other and a second region that reflects or transmits both.
    Type: Application
    Filed: January 23, 2019
    Publication date: October 29, 2020
    Inventors: Minjoo PARK, Kazuo SHIKITA, Chiaki KINNO, Akihiro SHIRAISHI, Takuya SHIMIZU, Hiroshi NAKAMORI
  • Publication number: 20200050106
    Abstract: A photosensitive composition for EUV light includes a predetermined resin and a photoacid generator, or includes a predetermined resin having a repeating unit having a photoacid generating group, and satisfies Conditions 1 and 2, Condition 1: The A value determined by Formula (1) is 0.14 or more, A=([H]×0.04+[C]×1.0+[N]×2.1+[O]×3.6+[F]×5.6+[S]×1.5+[I]×39.5)/([H]×1+[C]×12+[N]×14+[O]×16+[F]×19+[S]×32+[I]×127)??Formula (1): Condition 2: The concentration of the solid content in the photosensitive composition for EUV light is 2.5% by mass or less.
    Type: Application
    Filed: October 17, 2019
    Publication date: February 13, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Michihiro SHIRAKAWA, Hajime FURUTANI, Mitsuhiro FUJITA, Tomotaka TSUCHIMURA, Takashi KAWASHIMA, Michihiro OGAWA, Akihiro KANEKO, Hironori OKA, Yasuharu SHIRAISHI
  • Patent number: 10491868
    Abstract: A projection video display apparatus includes an input unit to input a video signal; a display to display the inputted video signal; a plurality of light sources to generate light; an illumination optical system to guide the generated light to the display; a projection optical system to project light via the display; and a controller to control the light sources, a lighting ratio and a current value per time for each light source. The controller has a black display control mode, for each light source, which makes a relative rate of a lighting ratio for a light source with a specific color smaller than the other light sources, and reduces the current value of the other light sources to be less than a current value of the light source with the specific color when compared with a case where the input video signal is a white signal.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: November 26, 2019
    Assignee: Maxell, Ltd.
    Inventors: Shuhei Kobayashi, Kazuo Shikita, Akihiro Shiraishi, Naoya Oka
  • Patent number: 10416543
    Abstract: In a projection-type image display apparatus configured to project images formed on a display element by using light from a plurality of light sources, the apparatus includes light-source coolers provided to the light sources and configured to cool the light sources, and the light-source coolers are arranged so that light-source heat dissipating directions of all the light-source coolers are substantially the same among the light-source coolers the light-source heat dissipating directions being directed toward heat dissipating parts dissipating the heat of the light sources with reference to heat absorbing parts absorbing the heat of the light sources.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: September 17, 2019
    Assignee: MAXELL, LTD.
    Inventors: Takeshi Katayama, Kazuo Shikita, Akihiro Shiraishi, Tatsuya Ino, Hiroyuki Inoue
  • Publication number: 20190268577
    Abstract: A projection-type video image display apparatus measures quantity of light of a plurality of light sources by maintaining illuminance distribution of an illumination luminous flux. The apparatus includes R, B and G light sources, and a mirror configured to reflect white light obtained by synthesizing the light rays emitted from the respective light sources while making the white light pass through the mirror based on predetermined transmittance characteristics. An illuminance sensor disposed on the mirror's back surface and configured to measure quantity of light for each color of the white light which passed through the mirror, and a controller adjusts an amount of light emission of the light source of each color based on the quantity of light measured. The mirror allows the transmittance characteristics of each light transmittance in the center wavelengths of the R and B lights sources to be larger than those of the G light source.
    Type: Application
    Filed: April 22, 2019
    Publication date: August 29, 2019
    Applicant: MAXELL, LTD.
    Inventors: Akihiro SHIRAISHI, Kazuo SHIKITA
  • Patent number: 10382730
    Abstract: A projection-type video image display apparatus measures quantity of light of a plurality of light sources by maintaining illuminance distribution of an illumination luminous flux. The apparatus includes R, B and G light sources, and a mirror configured to reflect white light obtained by synthesizing the light rays emitted from the respective light sources while making the white light pass through the mirror based on predetermined transmittance characteristics. An illuminance sensor disposed on the mirror's back surface and configured to measure quantity of light for each color of the white light which passed through the mirror, and a controller adjusts an amount of light emission of the light source of each color based on the quantity of light measured. The mirror allows the transmittance characteristics of each light transmittance in the center wavelengths of the R and B lights sources to be larger than those of the G light source.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: August 13, 2019
    Assignee: MAXELL, LTD.
    Inventors: Akihiro Shiraishi, Kazuo Shikita
  • Patent number: 10342968
    Abstract: The present invention verifies a method of reducing skin irritation (particularly, cumulative skin irritation) caused by transdermal administration of a local anesthetic using iontophoresis, and provides an electrode pad for relief from a puncture pain which is safe not only at single administration but also at repeated administrations. The electrode pad comprises a base sheet; an electrode placed on the base sheet; an adhesive sheet placed on the base sheet and having an opening, within which the electrode being exposed; and a medicament reservoir containing a local anesthetic and placed in the opening of the adhesive sheet while being in contact with the electrode. An inner peripheral surface of the opening of the adhesive sheet and an outer peripheral surface of the medicament reservoir are prevented from coming into contact with human skin while contacting with each other, and thereby skin irritation is reduced.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: July 9, 2019
    Assignee: TEIKOKU SEIYAKU CO., LTD.
    Inventors: Akihiro Hasui, Atsuhiko Shiraishi, Ken-ichi Hattori, Shinji Tanaka, Hirokazu Takahashi, Makoto Takahashi
  • Publication number: 20190191132
    Abstract: A projection video display apparatus includes an input unit to input a video signal; a display to display the inputted video signal; a plurality of light sources to generate light; an illumination optical system to guide the generated light to the display; a projection optical system to project light via the display; and a controller to control the light sources, a lighting ratio and a current value per time for each light source. The controller has a black display control mode, for each light source, which makes a relative rate of a lighting ratio for a light source with a specific color smaller than the other light sources, and reduces the current value of the other light sources to be less than a current value of the light source with the specific color when compared with a case where the input video signal is a white signal.
    Type: Application
    Filed: August 5, 2016
    Publication date: June 20, 2019
    Applicant: MAXELL, LTD.
    Inventors: Shuhei KOBAYASHI, Kazuo SHIKITA, Akihiro SHIRAISHI, Naoya OKA
  • Patent number: 10313646
    Abstract: A projection-type video image display apparatus measures quantity of light of a plurality of light sources by maintaining illuminance distribution of an illumination luminous flux. The apparatus includes R, B and G light sources, and a mirror configured to reflect white light obtained by synthesizing the light rays emitted from the respective light sources while making the white light pass through the mirror based on predetermined transmittance characteristics. An illuminance sensor disposed on the mirror's back surface and configured to measure quantity of light for each color of the white light which passed through the mirror, and a controller adjusts an amount of light emission of the light source of each color based on the quantity of light measured. The mirror allows the transmittance characteristics of each light transmittance in the center wavelengths of the R and B lights sources to be larger than those of the G light source.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: June 4, 2019
    Assignee: Maxell, Ltd.
    Inventors: Akihiro Shiraishi, Kazuo Shikita
  • Publication number: 20190041731
    Abstract: In a projection-type image display apparatus configured to project images formed on a display element by using light from a plurality of light sources, the apparatus includes light-source coolers provided to the light sources and configured to cool the light sources, and the light-source coolers are arranged so that light-source heat dissipating directions of all the light-source coolers are substantially the same among the light-source coolers the light-source heat dissipating directions being directed toward heat dissipating parts dissipating the heat of the light sources with reference to heat absorbing parts absorbing the heat of the light sources.
    Type: Application
    Filed: September 23, 2016
    Publication date: February 7, 2019
    Applicant: MAXELL, LTD.
    Inventors: Takeshi KATAYAMA, Kazuo SHIKITA, Akihiro SHIRAISHI, Tatsuya INO, Hiroyuki INOUE
  • Publication number: 20190028680
    Abstract: A projection-type video image display apparatus measures quantity of light of a plurality of light sources by maintaining illuminance distribution of an illumination luminous flux. The apparatus includes R, B and G light sources, and a mirror configured to reflect white light obtained by synthesizing the light rays emitted from the respective light sources while making the white light pass through the mirror based on predetermined transmittance characteristics. An illuminance sensor disposed on the mirror's back surface and configured to measure quantity of light for each color of the white light which passed through the mirror, and a controller adjusts an amount of light emission of the light source of each color based on the quantity of light measured. The mirror allows the transmittance characteristics of each light transmittance in the center wavelengths of the R and B lights sources to be larger than those of the G light source.
    Type: Application
    Filed: October 25, 2016
    Publication date: January 24, 2019
    Applicant: MAXELL, LTD.
    Inventors: Akihiro SHIRAISHI, Kazuo SHIKITA
  • Publication number: 20180217351
    Abstract: A projection type image display device includes a focus adjusting unit that adjusts a focal position of a projection lens. The projection lens includes a front side lens group and a rear side lens group which are displaceable toward the screen. The focus adjusting unit includes a back focus adjusting unit that adjusts a position of the rear side lens group and a peripheral adjusting unit that adjusts a position of the front side lens group, and the back focus adjusting unit and the peripheral adjusting unit independently adjust the position of the rear side lens group and the position of the front side lens group by individual driving of motors.
    Type: Application
    Filed: November 14, 2014
    Publication date: August 2, 2018
    Applicant: Hitachi Maxell, Ltd.
    Inventors: Akihiro SHIRAISHI, Kazuo SHIKITA, Satoshi NAKAYAMA
  • Patent number: 8896638
    Abstract: An initial light control value calculation section calculates the backlight's initial light control value K0 according to brightness of an inputted image signal for each area. A black area measurement section measures a black area S by obtaining ratio of the number of pixels satisfying Y?Y0 (Y: brightness signal level, Y0: black level threshold) in the screen. A minimum light control value output section determines a minimum light control value Kmin based on comparison between the measured black area S and a black area threshold S0 and outputs a maximum value permissible for the light control value as the value Kmin when the black area S is the threshold value S0 or less. An LED control signal calculation section outputs a control signal to LED light sources based on a light control value K1 as the higher one of K0 and Kmin.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: November 25, 2014
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Hiroyuki Kurabayashi, Yasutaka Tsuru, Yuya Ogi, Kazuhiko Tanaka, Akihiro Shiraishi
  • Patent number: 8390640
    Abstract: A television device structured to automatically adjust the color temperature on the display screen in accordance with the viewing environment includes an external light detection unit or an optical sensor for detecting the illuminance and the tint of the ambient light, and an image quality control unit or a microcomputer for adjusting quality of the video image to be displayed on the display panel. The image quality control unit adjusts the color temperature of the video image to be displayed in accordance with the illuminance value and the tint value detected by the external light detection unit. The optical sensor includes an illuminance sensor for mainly detecting the visible light, and an infrared sensor for mainly detecting the infrared light. The illuminance value and the tint value are obtained based on the output values of those two sensors.
    Type: Grant
    Filed: November 10, 2009
    Date of Patent: March 5, 2013
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Hiroshi Aoki, Akira Kitazume, Daisuke Honda, Naoya Oka, Yuki Nagano, Hiroyuki Kurabayashi, Akihiro Shiraishi, Toshiaki Ohyama
  • Publication number: 20110267379
    Abstract: An initial light control value calculation section calculates the backlight's initial light control value K0 according to brightness of an inputted image signal for each area. A black area measurement section measures a black area S by obtaining ratio of the number of pixels satisfying Y?Y0 (Y: brightness signal level, Y0: black level threshold) in the screen. A minimum light control value output section determines a minimum light control value Kmin based on comparison between the measured black area S and a black area threshold S0 and outputs a maximum value permissible for the light control value as the value Kmin when the black area S is the threshold value S0 or less. An LED control signal calculation section outputs a control signal to LED light sources based on a light control value K1 as the higher one of K0 and Kmin.
    Type: Application
    Filed: April 15, 2011
    Publication date: November 3, 2011
    Inventors: Hiroyuki KURABAYASHI, Yasutaka Tsuru, Yuya Ogi, Kazuhiko Tanaka, Akihiro Shiraishi