Patents by Inventor Takahiro Naitou

Takahiro Naitou 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: 8076847
    Abstract: To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LXMYN((2/3)X+(4/3)Y):R or LXMYOZN((2/3)X+(4/3)Y?(2/3)Z):R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu.); contains the another elements.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: December 13, 2011
    Assignee: Nichia Corporation
    Inventors: Hiroto Tamaki, Takahiro Naitou, Yoshinori Murazaki
  • Patent number: 8058793
    Abstract: To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LXMYN((2/3)X+(4/3)Y):R or LXMYOZN((2/3)X+(4/3)Y?(2/3)Z):R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu.); contains the another elements.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: November 15, 2011
    Assignee: Nichia Corporation
    Inventors: Hiroto Tamaki, Masatoshi Kameshima, Motokazu Yamada, Takahiro Naitou, Kazuhiko Sakai
  • Patent number: 8044569
    Abstract: A light emitting device includes a wavelength converting member for absorbing light emitted by an exciting light source and emitting light of a different wavelength. With a wavelength at which the light from the exciting light source has a maximum energy intensity denoted as a first wavelength, a wavelength at which the light from the wavelength converting member has a maximum energy intensity denoted as a second wavelength, a wavelength lying between the first and second wavelengths at which the light from the light emitting device has a minimum energy intensity denoted as a third wavelength, and 650 nm denoted as a fourth wavelength, then the light emitting device has an emission spectrum such that the proportion of the energy intensity at the first wavelength to the energy intensity at the third wavelength is in a range from 100:15 to 100:150, and the proportion of the energy intensity at the first wavelength to the energy intensity at the fourth wavelength is in a range from 100:45 to 100:200.
    Type: Grant
    Filed: June 15, 2006
    Date of Patent: October 25, 2011
    Assignee: Nichia Corporation
    Inventors: Suguru Takashima, Masato Aihara, Junji Takeichi, Takahiro Naitou, Hiroto Tamaki, Tomohisa Kishimoto
  • Patent number: 7964113
    Abstract: To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LXMYN((2/3)X+(4/3)Y):R or LXMYOZN((2/3)X+(4/3)Y?(2/3)Z):R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu.); contains the another elements.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: June 21, 2011
    Assignee: Nichia Corporation
    Inventors: Hiroto Tamaki, Masatoshi Kameshima, Suguru Takashima, Motokazu Yamada, Takahiro Naitou, Kazuhiko Sakai, Yoshinori Murazaki
  • Patent number: 7951308
    Abstract: An oxynitride phosphor consisting of a crystal containing at least one or more of Group II elements selected from the group consisting of Be, Mg, Ca, Sr, Ba and Zn, at least one or more of Group IV elements selected from the group consisting of C, Si, Ge, Sn, Ti, Zr and Hf, and a rare earth element being an activator R, thereby providing a phosphor which is excited by an excitation light source at an ultraviolet to visible light region and which has a blue green to yellow luminescence color that is wavelength converted.
    Type: Grant
    Filed: July 26, 2010
    Date of Patent: May 31, 2011
    Assignee: Nichia Corporation
    Inventors: Hiroto Tamaki, Suguru Takashima, Masatoshi Kameshima, Takahiro Naitou
  • Patent number: 7951306
    Abstract: An oxynitride phosphor consisting of a crystal containing at least one or more of Group II elements selected from the group consisting of Be, Mg, Ca, Sr, Ba and Zn, at least one or more of Group IV elements selected from the group consisting of C, Si, Ge, Sn, Ti, Zr and Hf, and a rare earth element being an activator R, thereby providing a phosphor which is excited by an excitation light source at an ultraviolet to visible light region and which has a blue green to yellow luminescence color that is wavelength converted.
    Type: Grant
    Filed: May 3, 2010
    Date of Patent: May 31, 2011
    Assignee: Nichia Corporation
    Inventors: Hiroto Tamaki, Suguru Takashima, Masatoshi Kameshima, Takahiro Naitou
  • Patent number: 7951307
    Abstract: An oxynitride phosphor consisting of a crystal containing at least one or more of Group II elements selected from the group consisting of Be, Mg, Ca, Sr, Ba and Zn, at least one or more of Group IV elements selected from the group consisting of C, Si, Ge, Sn, Ti, Zr and Hf, and a rare earth element being an activator R, thereby providing a phosphor which is excited by an excitation light source at an ultraviolet to visible light region and which has a blue green to yellow luminescence color that is wavelength converted.
    Type: Grant
    Filed: May 3, 2010
    Date of Patent: May 31, 2011
    Assignee: Nichia Corporation
    Inventors: Hiroto Tamaki, Suguru Takashima, Masatoshi Kameshima, Takahiro Naitou
  • Patent number: 7854859
    Abstract: A red phosphor with excellent luminescent characteristics, and a light emitting device that uses this phosphor are provided. The phosphor is a nitride phosphor that is activated by europium, and absorbs light from the near ultraviolet range to the blue range to emit red light. The nitride phosphor has the following general formula, MwAlxSiyBzN((2/3)w+x+(4/3)y+z):Eu2+ where M is at least one element selected from the group consisting of Mg, Ca, Sr and Ba. In the general formula, w, x, y and z fall within the following ranges. 0.056?w?9, x=1, 0.056?y?18, and 0.0005?z?0.5 In addition, the mean particle diameter of the nitride phosphor is preferably not less than 2 ?m and not more than 15 ?m.
    Type: Grant
    Filed: December 28, 2005
    Date of Patent: December 21, 2010
    Assignee: Nichia Corporation
    Inventors: Masatoshi Kameshima, Shoji Hosokawa, Suguru Takashima, Hiroto Tamaki, Takayuki Shinohara, Takahiro Naitou, Tomohisa Kishimoto
  • Publication number: 20100289404
    Abstract: An oxynitride phosphor consisting of a crystal containing at least one or more of Group II elements selected from the group consisting of Be, Mg, Ca, Sr, Ba and Zn, at least one or more of Group IV elements selected from the group consisting of C, Si, Ge, Sn, Ti, Zr and Hf, and a rare earth element being an activator R, thereby providing a phosphor which is excited by an excitation light source at an ultraviolet to visible light region and which has a blue green to yellow luminescence color that is wavelength converted.
    Type: Application
    Filed: May 3, 2010
    Publication date: November 18, 2010
    Applicant: Nichia Corporation
    Inventors: Hiroto Tamaki, Suguru Takashima, Masatoshi Kameshima, Takahiro Naitou
  • Publication number: 20100289403
    Abstract: An oxynitride phosphor consisting of a crystal containing at least one or more of Group II elements selected from the group consisting of Be, Mg, Ca, Sr, Ba and Zn, at least one or more of Group IV elements selected from the group consisting of C, Si, Ge, Sn, Ti, Zr and Hf, and a rare earth element being an activator R, thereby providing a phosphor which is excited by an excitation light source at an ultraviolet to visible light region and which has a blue green to yellow luminescence color that is wavelength converted.
    Type: Application
    Filed: May 3, 2010
    Publication date: November 18, 2010
    Applicant: Nichia Corporation
    Inventors: Hiroto Tamaki, Suguru Takashima, Masatoshi Kameshima, Takahiro Naitou
  • Publication number: 20100288973
    Abstract: An oxynitride phosphor consisting of a crystal containing at least one or more of Group II elements selected from the group consisting of Be, Mg, Ca, Sr, Ba and Zn, at least one or more of Group IV elements selected from the group consisting of C, Si, Ge, Sn, Ti, Zr and Hf, and a rare earth element being an activator R, thereby providing a phosphor which is excited by an excitation light source at an ultraviolet to visible light region and which has a blue green to yellow luminescence color that is wavelength converted.
    Type: Application
    Filed: July 26, 2010
    Publication date: November 18, 2010
    Applicant: Nichia Corporation
    Inventors: Hiroto Tamaki, Suguru Takashima, Masatoshi Kameshima, Takahiro Naitou
  • Publication number: 20100277054
    Abstract: A light emitting device having a wavelength converting member for absorbing light from a pumping light source and converting its wavelength. Assuming a wavelength where the light from the pumping light source has a maximum energy intensity is a first wavelength, a wavelength where the light from the wavelength converting member has a maximum energy intensity is a second wavelength, a wavelength between the first and second wavelengths where emission spectrum of the light emitting device has a minimum energy intensity is a third wavelength, and a wavelength of 650 nm is a fourth wavelength, the ratio of energy intensity between the first and third wavelengths is 100:15-150, and the ratio of energy intensity between the first and fourth wavelengths is 100:45-200.
    Type: Application
    Filed: June 15, 2006
    Publication date: November 4, 2010
    Applicant: NICHIA CORPORATION
    Inventors: Suguru Takashima, Masato Aihara, Junji Takeichi, Takahiro Naitou, Hiroto Tamaki, Tomohisa Kishimoto
  • Patent number: 7805240
    Abstract: A driving behavior prediction apparatus includes, for accurately predicting a driving behavior, a position calculation unit for a subject vehicle position calculation, a route setting unit for setting a navigation route, a distance calculation unit for calculating a distance to a nearest object point, a parameter storage unit for storing a template weighting factor that reflects a driving operation tendency of a driver, a driving behavior prediction unit for predicting a driver's behavior based on vehicle information and the template weighting factor, a driving behavior recognition unit for recognizing driver's behavior at the object point, and a driving behavior learning unit for updating the template weighting factor so as to study the driving operation tendency of the driver in a case that a prediction result by the driving behavior prediction unit agrees with a recognition result by the driving behavior recognition unit.
    Type: Grant
    Filed: November 20, 2007
    Date of Patent: September 28, 2010
    Assignee: DENSO CORPORATION
    Inventors: Takahiro Naitou, Takafumi Itoh
  • Patent number: 7794624
    Abstract: An oxynitride phosphor consisting of a crystal containing at least one or more of Group II elements selected from the group consisting of Be, Mg, Ca, Sr, Ba and Zn, at least one or more of Group IV elements selected from the group consisting of C, Si, Ge, Sn, Ti, Zr and Hf, and a rare earth element being an activator R, thereby providing a phosphor which is excited by an excitation light source at an ultraviolet to visible light region and which has a blue green to yellow luminescence color that is wavelength converted.
    Type: Grant
    Filed: October 15, 2003
    Date of Patent: September 14, 2010
    Assignee: Nichia Corporation
    Inventors: Hiroto Tamaki, Suguru Takashima, Masatoshi Kameshima, Takahiro Naitou
  • Publication number: 20090309485
    Abstract: To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LXMYN((2/3)X+(4/3)Y):R or LXMYOZN((2/3)X+(4/3)Y?(2/3)Z):R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu.); contains the another elements.
    Type: Application
    Filed: May 14, 2009
    Publication date: December 17, 2009
    Applicant: Nichia Corporation
    Inventors: Hiroto Tamaki, Masatoshi Kameshima, Suguru Takashima, Motokazu Yamada, Takahiro Naitou, Kazuhiko Sakai, Yoshinori Murazaki
  • Publication number: 20090284132
    Abstract: To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LXMYN((2/3)X+(4/3)Y):R or LXMYOZN((2/3)X+(4/3)Y?(2/3)Z):R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu.); contains the another elements.
    Type: Application
    Filed: May 15, 2009
    Publication date: November 19, 2009
    Applicant: Nichia Corporation
    Inventors: Hiroto Tamaki, Masatoshi Kameshima, Suguru Takashima, Motokazu Yamada, Takahiro Naitou, Kazuhiko Sakai, Yoshinori Murazaki
  • Patent number: 7597823
    Abstract: To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LXMYN((2/3)X+(4/3)Y):R or LXMYOZN((2/3)X+(4/3)Y?(2/3)Z):R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu); contains the another elements.
    Type: Grant
    Filed: October 3, 2007
    Date of Patent: October 6, 2009
    Assignee: Nichia Corporation
    Inventors: Hiroto Tamaki, Masatoshi Kameshima, Suguru Takashima, Motokazu Yamada, Takahiro Naitou, Kazuhiko Sakai, Yoshinori Murazaki
  • Publication number: 20090230840
    Abstract: To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LXMYN((2/3)X+(4/3)Y):R or LXMYOZN((2/3)X+(4/3)Y?(2/3)Z):R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu.); contains the another elements.
    Type: Application
    Filed: May 14, 2009
    Publication date: September 17, 2009
    Applicant: Nichia Corporation
    Inventors: Hiroto Tamaki, Masatoshi Kameshima, Suguru Takashima, Motokazu Yamada, Takahiro Naitou, Kazuhiko Sakai, Yoshinori Murazaki
  • Patent number: 7569987
    Abstract: An object of the present invention is to provide a light emitting apparatus that allows it to easily control the driving of LED and has high color rendering properties. The light emitting apparatus comprises the first light emitting device 108a that has first peak emission wavelength in blue region and emits blue light, the fluorescent material 140 that is excited by the light from the first light emitting device 108a and emits red light, the second light emitting device 108b that has second peak emission wavelength which is longer than the first peak emission wavelength and is shorter than peak emission wavelength of the fluorescent material 140, and the second light emitting device 108b that emits green light of second peak emission wavelength which is longer than the first peak emission wavelength, so as to emit light generated by blending of blue light, green light and red light to the outside.
    Type: Grant
    Filed: August 30, 2005
    Date of Patent: August 4, 2009
    Assignee: Nichia Corporation
    Inventor: Takahiro Naitou
  • Publication number: 20080149957
    Abstract: A red phosphor with excellent luminescent characteristics, and a light emitting device that uses this phosphor are provided. The phosphor is a nitride phosphor that is activated by europium, and absorbs light from the near ultraviolet range to the blue range to emit red light. The nitride phosphor has the following general formula, MwAlxSiyBzN((2/3)w+x+(4/3)y+z):Eu2+ where M is at least one element selected from the group consisting of Mg, Ca, Sr and Ba. In the general formula, w, x, y and z fall within the following ranges. 0.056?w?9, x=1, 0.056?y?18, and 0.0005?z?0.5 In addition, the mean particle diameter of the nitride phosphor is preferably not less than 2 ?m and not more than 15 ?m.
    Type: Application
    Filed: December 28, 2005
    Publication date: June 26, 2008
    Applicant: Nichia Corporation
    Inventors: Masatoshi Kameshima, Shoji Hosokawa, Suguru Takashima, Hiroto Tamaki, Takayuki Shinohara, Takahiro Naitou, Tomohisa Kishimoto