Patents by Inventor Shigefumi Sakai

Shigefumi Sakai 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: 11480855
    Abstract: An image display device includes a display unit which displays a first image and a second image, and a projection optical system which directs light of the first image and light of the second image toward a windshield. The display unit displays the first image and the second image in different display areas on the same plane. The projection optical system sets an image point of the light of the first image and an image point of the light of the second image, so that a first virtual image and a second virtual image are formed at positions having different distances from a viewing point within a visible area.
    Type: Grant
    Filed: March 29, 2021
    Date of Patent: October 25, 2022
    Assignee: DUALITAS LTD
    Inventor: Shigefumi Sakai
  • Publication number: 20210232028
    Abstract: An image display device includes a display unit which displays a first image and a second image, and a projection optical system which directs light of the first image and light of the second image toward a windshield. The display unit displays the first image and the second image in different display areas on the same plane. The projection optical system sets an image point of the light of the first image and an image point of the light of the second image, so that a first virtual image and a second virtual image are formed at positions having different distances from a viewing point within a visible area.
    Type: Application
    Filed: March 29, 2021
    Publication date: July 29, 2021
    Inventor: Shigefumi Sakai
  • Patent number: 10983423
    Abstract: An image display device includes a display unit which displays a first image and a second image, and a projection optical system which directs light of the first image and light of the second image toward a windshield. The display unit displays the first image and the second image in different display areas on the same plane. The projection optical system sets an image point of the light of the first image and an image point of the light of the second image, so that a first virtual image and a second virtual image are formed at positions having different distances from a viewing point within a visible area.
    Type: Grant
    Filed: May 15, 2019
    Date of Patent: April 20, 2021
    Assignee: Dualitas Ltd
    Inventor: Shigefumi Sakai
  • Patent number: 10852627
    Abstract: An image display device includes a display unit which displays a first image and a second image, and a projection optical system which directs light of the first image and light of the second image toward a windshield. The display unit displays the first image and the second image in different display areas on the same plane. The projection optical system sets an image point of the light of the first image and an image point of the light of the second image, so that a first virtual image and a second virtual image are formed at positions having different distances from a viewing point within a visible area.
    Type: Grant
    Filed: May 15, 2019
    Date of Patent: December 1, 2020
    Assignee: ALPS ALPINE CO., LTD.
    Inventor: Shigefumi Sakai
  • Publication number: 20190265582
    Abstract: An image display device includes a display unit which displays a first image and a second image, and a projection optical system which directs light of the first image and light of the second image toward a windshield. The display unit displays the first image and the second image in different display areas on the same plane. The projection optical system sets an image point of the light of the first image and an image point of the light of the second image, so that a first virtual image and a second virtual image are formed at positions having different distances from a viewing point within a visible area.
    Type: Application
    Filed: May 15, 2019
    Publication date: August 29, 2019
    Inventor: Shigefumi SAKAI
  • Patent number: 8017046
    Abstract: A skin cosmetic composition comprising: a hydrogel particle comprising a non-crosslinked hydrogel containing an oil component therein dispersed in an aqueous medium; a hydrogel particle comprising a non-crosslinked hydrogel containing an oil component therein; and a process for preparing a hydrogel particle comprising the steps of discharging an oil component-emulsified or dispersed solution prepared by dissolving a non-crosslinked hydrogel in an aqueous solution, with vibration from an orifice to form droplets; and cooling the droplets to solidify.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: September 13, 2011
    Assignee: Kao Corporation
    Inventors: Shigefumi Sakai, Atsuyuki Kiba, Chitoshi Shigeno, Hideaki Kubo
  • Publication number: 20090155323
    Abstract: A skin cosmetic composition comprising: a hydrogel particle comprising a non-crosslinked hydrogel containing an oil component therein dispersed in an aqueous medium; a hydrogel particle comprising a non-crosslinked hydrogel containing an oil component therein; and a process for preparing a hydrogel particle comprising the steps of discharging an oil component-emulsified or dispersed solution prepared by dissolving a non-crosslinked hydrogel in an aqueous solution, with vibration from an orifice to form droplets; and cooling the droplets to solidify.
    Type: Application
    Filed: February 20, 2009
    Publication date: June 18, 2009
    Applicant: Kao Corporation
    Inventors: Shigefumi SAKAI, Atsuyuki Kiba, Chitoshi Shigeno, Hideaki Kubo
  • Patent number: 7319581
    Abstract: A capacitive pressure sensor includes: a conductive silicon substrate having a diaphragm; an insulating substrate having a fixed electrode, the insulating substrate overlapping the conductive silicon substrate so as to be bonded thereto; and a sealed chamber formed between the diaphragm and the fixed electrode. A conductive silicon member is buried in a part of the insulating substrate, a portion of the conductive silicon member is exposed toward a surface of the insulating substrate facing the sealed chamber so as to form the fixed electrode, and another portion of the conductive silicon member is exposed toward the other surface of the insulating substrate not facing the sealed chamber so as to form a lead electrode of the fixed electrode.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: January 15, 2008
    Assignee: ALPS Electric Co., Ltd.
    Inventors: Toshihide Suto, Shigefumi Sakai, Sasahiro Takahashi
  • Patent number: 7135749
    Abstract: A pressure sensor includes a silicon-on-insulator (SOI) substrate, a glass substrate bonded to the SOI substrate by anode bonding, a silicon island formed on a part of a silicon layer of the SOI substrate and surrounded by a groove extending to an insulating layer of the SOI substrate, a through hole formed in the glass substrate, and an output electrode that is made of a conductive material, is disposed inside the through hole, and is electrically connected to an electrode formed on the glass substrate via the silicon island.
    Type: Grant
    Filed: January 3, 2005
    Date of Patent: November 14, 2006
    Assignee: Alps Electric Co., Ltd.
    Inventors: Shigefumi Sakai, Munemitsu Abe
  • Publication number: 20060133006
    Abstract: A capacitive pressure sensor includes: a conductive silicon substrate having a diaphragm; an insulating substrate having a fixed electrode, the insulating substrate overlapping the conductive silicon substrate so as to be bonded thereto; and a sealed chamber formed between the diaphragm and the fixed electrode. A conductive silicon member is buried in a part of the insulating substrate, a portion of the conductive silicon member is exposed toward a surface of the insulating substrate facing the sealed chamber so as to form the fixed electrode, and another portion of the conductive silicon member is exposed toward the other surface of the insulating substrate not facing the sealed chamber so as to form a lead electrode of the fixed electrode.
    Type: Application
    Filed: December 2, 2005
    Publication date: June 22, 2006
    Inventors: Toshihide Suto, Shigefumi Sakai, Sasahiro Takahashi
  • Publication number: 20050156241
    Abstract: A pressure sensor includes a silicon-on-insulator (SOI) substrate, a glass substrate bonded to the SOI substrate by anode bonding, a silicon island formed on a part of a silicon layer of the SOI substrate and surrounded by a groove extending to an insulating layer of the SOI substrate, a through hole formed in the glass substrate, and an output electrode that is made of a conductive material, is disposed inside the through hole, and is electrically connected to an electrode formed on the glass substrate via the silicon island.
    Type: Application
    Filed: January 3, 2005
    Publication date: July 21, 2005
    Inventors: Shigefumi Sakai, Munemitsu Abe
  • Publication number: 20040207921
    Abstract: A multilayer film optical filter includes a multilayer film including a plurality of dielectric material thin films repeatedly laminated on a substrate and having different refractive indexes. The multilayer film optical filter further includes a relaxation layer composed of a single material, having a thickness in the range of 1 to 10 &mgr;m, and provided below the multilayer film near the substrate, for relaxing the influence of an error in thickness measurement due to a temperature rise of the substrate in an initial stage of deposition.
    Type: Application
    Filed: May 12, 2004
    Publication date: October 21, 2004
    Applicant: ALPS Electric Co., Ltd.
    Inventors: Hitoshi Kitagawa, Takashi Hatanai, Yuichi Umeda, Shigefumi Sakai
  • Patent number: 6635589
    Abstract: Silicon oxide films which are good as gate insulation films are formed by subjecting a silicon oxide film which has been formed on an active layer comprising a silicon film by means of a PVD method or CVD method to a heat treatment at 300-700° C. in a dinitrogen monoxide atmosphere, or in an NH3 or N2H4 atmosphere, while irradiating with ultraviolet light, reducing the hydrogen and carbon contents in the silicon oxide film and introducing nitrogen into the boundary with the silicon film in particular. Furthermore, silicon oxide films which are good as gate insulating films have been formed by subjecting silicon oxide films which have been formed on an active layer comprising a silicon film by means of a PVD method or CVD method to a heat treatment at 300-700° C. in an N2O atmosphere (or hydrogen nitride atmosphere) while irradiating with ultraviolet light, and then carrying out a heat treatment at 300-700° C.
    Type: Grant
    Filed: April 7, 1999
    Date of Patent: October 21, 2003
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Yasuhiko Takemura, Mitsunori Sakama, Tomohiko Sato, Satoshi Teramoto, Shigefumi Sakai
  • Publication number: 20030142407
    Abstract: A multilayer film optical filter includes a multilayer film including a plurality of dielectric material thin films repeatedly laminated on a substrate and having different refractive indexes. The multilayer film optical filter further includes a relaxation layer composed of a single material, having a thickness in the range of 1 to 10 &mgr;m, and provided below the multilayer film near the substrate, for relaxing the influence of an error in thickness measurement due to a temperature rise of the substrate in an initial stage of deposition.
    Type: Application
    Filed: January 17, 2003
    Publication date: July 31, 2003
    Applicant: ALPS ELECTRIC CO., LTD.
    Inventors: Hitoshi Kitagawa, Takashi Hatanai, Yuichi Umeda, Shigefumi Sakai
  • Publication number: 20020160622
    Abstract: Silicon oxide films which are good as gate insulation films are formed by subjecting a silicon oxide film which has been formed on an active layer comprising a silicon film by means of a PVD method or CVD method to a heat treatment at 300-700° C. in a dinitrogen monoxide atmosphere, or in an NH3 or N2H4 atmosphere, while irradiating with ultraviolet light, reducing the hydrogen and carbon contents in the silicon oxide film and introducing nitrogen into the boundary with the silicon film in particular. Furthermore, silicon oxide films which are good as gate insulating films have been formed by subjecting silicon oxide films which have been formed on an active layer comprising a silicon film by means of a PVD method or CVD method to a heat treatment at 300-700° C. in an N2O atmosphere (or hydrogen nitride atmosphere) while irradiating with ultraviolet light, and then carrying out a heat treatment at 300-700° C.
    Type: Application
    Filed: April 7, 1999
    Publication date: October 31, 2002
    Inventors: SHUNPEI YAMAZAKI, YASUHIKO TAKEMURA, MITSUNORI SAKAMA, TOMOHIKO SATO, SATOSHI TERAMOTO, SHIGEFUMI SAKAI
  • Publication number: 20020034525
    Abstract: A skin cosmetic composition comprising: a hydrogel particle comprising a non-crosslinked hydrogel containing an oil component therein dispersed in an aqueous medium; a hydrogel particle comprising a non-crosslinked hydrogel containing an oil component therein; and a process for preparing a hydrogel particle comprising the steps of discharging an oil component-emulsified or dispersed solution prepared by dissolving a non-crosslinked hydrogel in an aqueous solution, with vibration from an orifice to form droplets; and cooling the droplets to solidify.
    Type: Application
    Filed: June 28, 2001
    Publication date: March 21, 2002
    Applicant: Kao Corporation
    Inventors: Shigefumi Sakai, Atsuyuki Kiba, Chitoshi Shigeno, Hideaki Kubo
  • Patent number: 5970384
    Abstract: Silicon oxide films which are good as gate insulation films are formed by subjecting a silicon oxide film which has been formed on an active layer comprising a silicon film by means of a PVD method or CVD method to a heat treatment at 300-700.degree. C. in a dinitrogen monoxide atmosphere, or in an NH.sub.3 or N.sub.2 H.sub.4 atmosphere, while irradiating with ultraviolet light, reducing the hydrogen and carbon contents in the silicon oxide film and introducing nitrogen into the boundary with the silicon film in particular. Furthermore, silicon oxide films which are good as gate insulating films have been formed by subjecting silicon oxide films which have been formed on an active layer comprising a silicon film by means of a PVD method or CVD method to a heat treatment at 300-700.degree. C. in an N.sub.2 O atmosphere (or hydrogen nitride atmosphere) while irradiating with ultraviolet light, and then carrying out a heat treatment at 300-700.degree. C. in a hydrogen nitride atmosphere (N.sub.
    Type: Grant
    Filed: August 2, 1995
    Date of Patent: October 19, 1999
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Yasuhiko Takemura, Mitsunori Sakama, Tomohiko Sato, Satoshi Teramoto, Shigefumi Sakai