Patents by Inventor Fumika Sumiyama
Fumika Sumiyama 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).
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Patent number: 8926100Abstract: An illumination device includes a light source including plural light emitting devices arranged in a pattern and that generate and guide light, the light emitting devices having tilted gain regions wherein guiding directions of the light are tilted with respect to a perpendicular of output surfaces of the light source, an optical axis conversion device that bends optical axes of the light output from the light source, and a light distribution control device that controls a light distribution angle of the light output from the optical axis conversion device, wherein the light emitting devices are super luminescent diodes, and the light output from the light distribution control device diverge.Type: GrantFiled: February 29, 2012Date of Patent: January 6, 2015Assignee: Seiko Epson CorporationInventors: Yoshitaka Itoh, Hiroyasu Kaseya, Fumika Sumiyama, Junichi Okamoto
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Patent number: 8477315Abstract: A volume hologram includes: an incidence surface onto which coherent light having a plurality of wavelengths is incident; and a plurality of interference fringes having streaks so that the angles between the streaks and the incidence surface are different from each other and so that the each interference fringe corresponds to one wavelength of the coherent light.Type: GrantFiled: February 4, 2008Date of Patent: July 2, 2013Assignee: Seiko Epson CorporationInventor: Fumika Sumiyama
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Patent number: 8425056Abstract: An image display apparatus includes: a light source unit which emits axially symmetric polarized light having polarization distribution symmetric with respect to the center axis of light; and a scanning unit which applies the axially symmetric polarized light to a projection surface for scanning to form an image.Type: GrantFiled: March 11, 2010Date of Patent: April 23, 2013Assignee: Seiko Epson CorporationInventor: Fumika Sumiyama
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Publication number: 20120229775Abstract: An illumination device includes a light source including plural light emitting devices arranged in a pattern and that generate and guide light, the light emitting devices having tilted gain regions wherein guiding directions of the light are tilted with respect to a perpendicular of output surfaces of the light source, an optical axis conversion device that bends optical axes of the light output from the light source, and a light distribution control device that controls a light distribution angle of the light output from the optical axis conversion device, wherein the light emitting devices are super luminescent diodes, and the light output from the light distribution control device diverge.Type: ApplicationFiled: February 29, 2012Publication date: September 13, 2012Applicant: SEIKO EPSON CORPORATIONInventors: Yoshitaka ITOH, Hiroyasu KASEYA, Fumika SUMIYAMA, Junichi OKAMOTO
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Patent number: 8057051Abstract: A light source device includes a plurality of light emitting elements for emitting light beams, a resonant mirror functioning as a resonator for selectively reflecting the light beams emitted respectively from the light emitting elements, towards the light emitting elements, a wavelength selection element disposed on light paths between the light emitting elements and the resonant mirror, having a plurality of light selection areas for executing selection respectively on the light beams emitted respectively from the light emitting elements, transmitting light beams each having a part of a wavelength band of corresponding one of the light beams emitted respectively from the light emitting elements, and having a narrower width of a wavelength band of the light beam to be transmitted than a width of wavelength band of the light beam to be reflected by the resonant mirror, and a state changing section that changes a state of the plurality of light selection areas, and the state changing section changes the stateType: GrantFiled: August 12, 2008Date of Patent: November 15, 2011Assignee: Seiko Epson CorporationInventors: Fumika Sumiyama, Masatoshi Yonekubo
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Patent number: 8047659Abstract: A light source device includes plural light-emitting elements that emit lights, a wavelength selection element that has plural light selection areas in which wavelength selection is performed for the lights emitted from the plural light-emitting elements, respectively, and selectively reflects a part of the lights emitted from the plural light-emitting elements, a state detecting unit that detects states of the plural light selection areas of the wavelength selection element, and a state changing unit that changes, according to the states of the plural light selection areas detected by the state detecting unit, the states of the light selection areas of the wavelength selection element to make wavelengths of the lights selected in the plural light selection areas different from one another.Type: GrantFiled: June 10, 2008Date of Patent: November 1, 2011Assignee: Seiko Epson CorporationInventors: Fumika Sumiyama, Akira Miyamae
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Patent number: 8038306Abstract: A light source device includes: a plurality of light emitting elements that emit laser light; and a wavelength selective element that includes a light selective region functioning as a resonator mirror of the light emitting element by selecting light of predetermined selective wavelength from the laser light emitted from one of the light emitting elements and reflecting the selected light toward the light emitting element while allowing the remaining laser light to pass therethrough, and a base member having a plurality of the light selective regions so that the wavelengths of the light selected by the light selective regions are different from each other.Type: GrantFiled: February 9, 2011Date of Patent: October 18, 2011Assignee: Seiko Epson CorporationInventors: Fumika Sumiyama, Takashi Takeda
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Publication number: 20110128734Abstract: A light source device includes: a plurality of light emitting elements that emit laser light; and a wavelength selective element that includes a light selective region functioning as a resonator mirror of the light emitting element by selecting light of predetermined selective wavelength from the laser light emitted from one of the light emitting elements and reflecting the selected light toward the light emitting element while allowing the remaining laser light to pass therethrough, and a base member having a plurality of the light selective regions so that the wavelengths of the light selected by the light selective regions are different from each other.Type: ApplicationFiled: February 9, 2011Publication date: June 2, 2011Applicant: SEIKO EPSON CORPORATIONInventors: Fumika SUMIYAMA, Takashi Takeda
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Patent number: 7905608Abstract: A light source device includes: a plurality of light emitting elements that emit laser light; and a wavelength selective element that includes a light selective region functioning as a resonator mirror of the light emitting element by selecting light of predetermined selective wavelength from the laser light emitted from one of the light emitting elements and reflecting the selected light toward the light emitting element while allowing the remaining laser light to pass therethrough, and a base member having a plurality of the light selective regions so that the wavelengths of the light selected by the light selective regions are different from each other.Type: GrantFiled: August 28, 2007Date of Patent: March 15, 2011Assignee: Seiko Epson CorporationInventors: Fumika Sumiyama, Takashi Takeda
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Publication number: 20100238099Abstract: An image display apparatus includes: a light source unit which emits axially symmetric polarized light having polarization distribution symmetric with respect to the center axis of light; and a scanning unit which applies the axially symmetric polarized light to a projection surface for scanning to form an image.Type: ApplicationFiled: March 11, 2010Publication date: September 23, 2010Applicant: SEIKO EPSON CORPORATIONInventor: Fumika SUMIYAMA
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Patent number: 7780311Abstract: A multi-wavelength light source device includes three light source devices. The light source device includes a plurality of light emitting elements, and a dispersing section making wavelengths of light beams emitted from the respective light emitting elements different from each other, a spectral line width of the emitted light beam in each of the light source devices is equal to or greater than 0.2 nm, a wavelength of the red light beam in the light source device for emitting the red light beam is greater than 612 nm, a wavelength of the green light beam in the light source device for emitting the green light beam is greater than 525 nm and smaller than 538 nm, and a wavelength of the blue light beam in the light source device for emitting the blue light beam is greater than 465 nm and smaller than 468 nm.Type: GrantFiled: August 29, 2008Date of Patent: August 24, 2010Assignee: Seiko Epson CorporationInventors: Fumika Sumiyama, Shunji Kamijima
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Patent number: 7775684Abstract: A wavelength selective element includes: a base member; light selective regions formed in the base member, in which a predetermined selective wavelength is selected from the laser light emitted from a plurality of light emission elements that emit the laser light; and interference regions, each of which is provided in one of the light selective regions, each of which includes interference fringes having streaks, and including at least a first interference region and a second interference region in which a first distance between streaks of the interference fringes of the first interference region is different from a second distance between streaks of the interference fringes of the second interference region.Type: GrantFiled: January 11, 2008Date of Patent: August 17, 2010Assignee: Seiko Epson CorporationInventors: Fumika Sumiyama, Shunji Kamijima
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Publication number: 20090122531Abstract: A multi-wavelength light source device includes three light source devices. The light source device includes a plurality of light emitting elements, and a dispersing section making wavelengths of light beams emitted from the respective light emitting elements different from each other, a spectral line width of the emitted light beam in each of the light source devices is equal to or greater than 0.2 nm, a wavelength of the red light beam in the light source device for emitting the red light beam is greater than 612 nm, a wavelength of the green light beam in the light source device for emitting the green light beam is greater than 525 nm and smaller than 538 nm, and a wavelength of the blue light beam in the light source device for emitting the blue light beam is greater than 465 nm and smaller than 468 nm.Type: ApplicationFiled: August 29, 2008Publication date: May 14, 2009Applicant: SEIKO EPSON CORPORATIONInventors: Fumika SUMIYAMA, Shunji KAMIJIMA
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Publication number: 20090059992Abstract: A light source device includes a plurality of light emitting elements for emitting light beams, a resonant mirror functioning as a resonator for selectively reflecting the light beams emitted respectively from the light emitting elements, towards the light emitting elements, a wavelength selection element disposed on light paths between the light emitting elements and the resonant mirror, having a plurality of light selection areas for executing selection respectively on the light beams emitted respectively from the light emitting elements, transmitting light beams each having a part of a wavelength band of corresponding one of the light beams emitted respectively from the light emitting elements, and having a narrower width of a wavelength band of the light beam to be transmitted than a width of wavelength band of the light beam to be reflected by the resonant mirror, and a state changing section that changes a state of the plurality of light selection areas, and the state changing section changes the stateType: ApplicationFiled: August 12, 2008Publication date: March 5, 2009Applicant: SEIKO EPSON CORPORATIONInventors: Fumika SUMIYAMA, Masatoshi YONEKUBO
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Publication number: 20090016390Abstract: A light source device includes plural light-emitting elements that emit lights, a wavelength selection element that has plural light selection areas in which wavelength selection is performed for the lights emitted from the plural light-emitting elements, respectively, and selectively reflects a part of the lights emitted from the plural light-emitting elements, a state detecting unit that detects states of the plural light selection areas of the wavelength selection element, and a state changing unit that changes, according to the states of the plural light selection areas detected by the state detecting unit, the states of the light selection areas of the wavelength selection element to make wavelengths of the lights selected in the plural light selection areas different from one another.Type: ApplicationFiled: June 10, 2008Publication date: January 15, 2009Applicant: Seiko Epson CorporationInventors: Fumika SUMIYAMA, Akira MIYAMAE
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Publication number: 20080192259Abstract: A volume hologram includes: an incidence surface onto which coherent light having a plurality of wavelengths is incident; and a plurality of interference fringes having streaks so that the angles between the streaks and the incidence surface are different from each other and so that the each interference fringe corresponds to one wavelength of the coherent light.Type: ApplicationFiled: February 4, 2008Publication date: August 14, 2008Applicant: SEIKO EPSON CORPORATIONInventor: Fumika Sumiyama
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Publication number: 20080174873Abstract: A wavelength selective element includes: a base member; light selective regions formed in the base member, in which a predetermined selective wavelength is selected from the laser light emitted from a plurality of light emission elements that emit the laser light; and interference regions, each of which is provided in one of the light selective regions, each of which includes interference fringes having streaks, and including at least a first interference region and a second interference region in which a first distance between streaks of the interference fringes of the first interference region is different from a second distance between streaks of the interference fringes of the second interference region.Type: ApplicationFiled: January 11, 2008Publication date: July 24, 2008Applicant: SEIKO EPSON CORPORATIONInventors: Fumika Sumiyama, Shunji Kamijima
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Publication number: 20080055567Abstract: A light source device includes: a plurality of light emitting elements that emit laser light; and a wavelength selective element that includes a light selective region functioning as a resonator mirror of the light emitting element by selecting light of predetermined selective wavelength from the laser light emitted from one of the light emitting elements and reflecting the selected light toward the light emitting element while allowing the remaining laser light to pass therethrough, and a base member having a plurality of the light selective regions so that the wavelengths of the light selected by the light selective regions are different from each other.Type: ApplicationFiled: August 28, 2007Publication date: March 6, 2008Applicant: SEIKO EPSON CORPORATIONInventors: Fumika Sumiyama, Takashi Takeda