Patents by Inventor Osamu Okumura
Osamu Okumura 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: 11508874Abstract: A light emitting apparatus including a substrate, a first and a second light emitter, a first mirror that reflects light from first light emitter, a second mirror that reflects light from second light emitter, and a support member that has a first and second hole and supports the first and second mirror. The first and second light emitter each include a first semiconductor layer, a second semiconductor layer having conductivity type different from the conductivity type of first semiconductor layer, and a light emitting layer provided between the first and second semiconductor layer. The first semiconductor layer forms a plurality of columnar sections. The plurality of columnar sections of the first light emitter and the second light emitter are disposed in the first and second hole respectively. The first mirror and second mirror are provided at the side surface of support member that defines the first and second hole respectively.Type: GrantFiled: November 27, 2020Date of Patent: November 22, 2022Assignee: SEIKO EPSON CORPORATIONInventor: Osamu Okumura
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Patent number: 11333961Abstract: A wavelength converter according to the present disclosure includes a wavelength conversion layer that has a first surface and a second surface, converts first light that belongs to a first wavelength band into second light that belongs to a second wavelength band, and emits the second light via the first surface, a transparent member having a third surface and a fourth surface, the third surface so provided as to face the first surface of the wavelength conversion layer, and a plurality of nano-antennas provided on the fourth surface of the transparent member. The wavelength conversion layer contains light scatterers, and the plurality of nano-antennas selectively emit third light that belongs to a specific wavelength band out of the second wavelength band along the direction of a normal to the fourth surface.Type: GrantFiled: October 30, 2020Date of Patent: May 17, 2022Assignee: Seiko Epson CorporationInventor: Osamu Okumura
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Patent number: 11215747Abstract: A light source device according to the present disclosure includes a light-emitting body configured to emit first wavelength range light, a wavelength converter that includes an incident surface on which the first wavelength range light is incident, and an emission surface configured to convert the first wavelength range light to second wavelength range light and subsequently emit, and for which the incident surface is set to be larger than the emission surface, a light collector including a light input part configured to enter the second wavelength range light, and a scattering part disposed on the emission surface of the wavelength converter or on a side closer to the light collector than the emission surface, wherein the light collector includes a reflective layer configured to reflect the second wavelength range light entered by the light input part.Type: GrantFiled: November 29, 2019Date of Patent: January 4, 2022Assignee: SEIKO EPSON CORPORATIONInventor: Osamu Okumura
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Publication number: 20210167247Abstract: A light emitting apparatus including a substrate, a first and a second light emitter, a first mirror that reflects light from first light emitter, a second mirror that reflects light from second light emitter, and a support member that has a first and second hole and supports the first and second mirror. The first and second light emitter each include a first semiconductor layer, a second semiconductor layer having conductivity type different from the conductivity type of first semiconductor layer, and a light emitting layer provided between the first and second semiconductor layer. The first semiconductor layer forms a plurality of columnar sections. The plurality of columnar sections of the first light emitter and the second light emitter are disposed in the first and second hole respectively. The first mirror and second mirror are provided at the side surface of support member that defines the first and second hole respectively.Type: ApplicationFiled: November 27, 2020Publication date: June 3, 2021Applicant: SEIKO EPSON CORPORATIONInventor: Osamu OKUMURA
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Publication number: 20210132483Abstract: A wavelength converter according to the present disclosure includes a wavelength conversion layer that has a first surface and a second surface, converts first light that belongs to a first wavelength band into second light that belongs to a second wavelength band, and emits the second light via the first surface, a transparent member having a third surface and a fourth surface, the third surface so provided as to face the first surface of the wavelength conversion layer, and a plurality of nano-antennas provided on the fourth surface of the transparent member. The wavelength conversion layer contains light scatterers, and the plurality of nano-antennas selectively emit third light that belongs to a specific wavelength band out of the second wavelength band along the direction of a normal to the fourth surface.Type: ApplicationFiled: October 30, 2020Publication date: May 6, 2021Applicant: SEIKO EPSON CORPORATIONInventor: Osamu OKUMURA
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Publication number: 20200174177Abstract: A light source device according to the present disclosure includes a light-emitting body configured to emit first wavelength range light, a wavelength converter that includes an incident surface on which the first wavelength range light is incident, and an emission surface configured to convert the first wavelength range light to second wavelength range light and subsequently emit, and for which the incident surface is set to be larger than the emission surface, a light collector including a light input part configured to enter the second wavelength range light, and a scattering part disposed on the emission surface of the wavelength converter or on a side closer to the light collector than the emission surface, wherein the light collector includes a reflective layer configured to reflect the second wavelength range light entered by the light input part.Type: ApplicationFiled: November 29, 2019Publication date: June 4, 2020Applicant: SEIKO EPSON CORPORATIONInventor: Osamu OKUMURA
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Patent number: 10620520Abstract: A wavelength conversion element includes a phosphor layer that emits fluorescence when excitation light is incident on the phosphor layer, a base having a reflection layer, and a filter provided on a side of the phosphor layer that is the side opposite the reflection layer. The filter is so configured that the reflectance of light that belongs to a wavelength region from the wavelength of the excitation light to the wavelength of the fluorescence and is incident on the filter at right angles is minimized at a first wavelength, and the first wavelength is located between the peak wavelength of the excitation light and the peak wavelength of the fluorescence.Type: GrantFiled: August 28, 2018Date of Patent: April 14, 2020Assignee: SEIKO EPSON CORPORATIONInventor: Osamu Okumura
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Publication number: 20190064644Abstract: A wavelength conversion element includes a phosphor layer that emits fluorescence when excitation light is incident on the phosphor layer, a base having a reflection layer, and a filter provided on a side of the phosphor layer that is the side opposite the reflection layer. The filter is so configured that the reflectance of light that belongs to a wavelength region from the wavelength of the excitation light to the wavelength of the fluorescence and is incident on the filter at right angles is minimized at a first wavelength, and the first wavelength is located between the peak wavelength of the excitation light and the peak wavelength of the fluorescence.Type: ApplicationFiled: August 28, 2018Publication date: February 28, 2019Applicant: SEIKO EPSON CORPORATIONInventor: Osamu OKUMURA
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Patent number: 9568771Abstract: A liquid crystal device includes a liquid crystal panel including a pair of substrates that sandwiches a liquid crystal layer containing liquid crystal molecules exhibiting a parallel alignment in an initial alignment state, and a polarizing plate disposed on either side of the liquid crystal panel. The liquid crystal molecules are inclined at a pretilt angle and aligned in a predetermined direction in planes of the substrates. The liquid crystal panel emits light entering through one of the polarizing plates toward the other. The liquid crystal panel emits light having the maximum intensity in a direction different from a direction normal to the substrates. The azimuth of the maximum-light-intensity direction projected onto the planes of the substrates is substantially parallel to the predetermined direction.Type: GrantFiled: March 16, 2015Date of Patent: February 14, 2017Assignee: SEIKO EPSON CORPORATIONInventor: Osamu Okumura
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Patent number: 9229273Abstract: A reflection type liquid crystal device has: a liquid crystal cell held between a pair of substrates and an optical compensation plate disposed outside the pair of substrates. The optical compensation plate has a first optical axis along the thickness direction thereof. The liquid crystal cell has a pretilt at which a second optical axis of a liquid crystal molecule of the liquid crystal cell is inclined with respect to a plate surface of the liquid crystal cell. The optical compensation plate is tiltable in a first direction in which a standard angle becomes larger, wherein the standard angle is defined as an acute angle between the first optical axis and the second optical axis when the optical compensation plate is located parallel to the plate surface of the liquid crystal cell.Type: GrantFiled: February 3, 2011Date of Patent: January 5, 2016Assignee: SEIKO EPSON CORPORATIONInventors: Akihide Haruyama, Osamu Okumura
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Publication number: 20150212356Abstract: A liquid crystal device includes a liquid crystal panel including a pair of substrates that sandwiches a liquid crystal layer containing liquid crystal molecules exhibiting a parallel alignment in an initial alignment state, and a polarizing plate disposed on either side of the liquid crystal panel. The liquid crystal molecules are inclined at a pretilt angle and aligned in a predetermined direction in planes of the substrates. The liquid crystal panel emits light entering through one of the polarizing plates toward the other. The liquid crystal panel emits light having the maximum intensity in a direction different from a direction normal to the substrates. The azimuth of the maximum-light-intensity direction projected onto the planes of the substrates is substantially parallel to the predetermined direction.Type: ApplicationFiled: March 16, 2015Publication date: July 30, 2015Inventor: Osamu OKUMURA
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Patent number: 9013657Abstract: A liquid crystal device includes a liquid crystal panel including a pair of substrates that sandwiches a liquid crystal layer containing liquid crystal molecules exhibiting a parallel alignment in an initial alignment state, and a polarizing plate disposed on either side of the liquid crystal panel. The liquid crystal molecules are inclined at a pretilt angle and aligned in a predetermined direction in planes of the substrates. The liquid crystal panel emits light entering through one of the polarizing plates toward the other. The liquid crystal panel emits light having the maximum intensity in a direction different from a direction normal to the substrates. The azimuth of the maximum-light-intensity direction projected onto the planes of the substrates is substantially parallel to the predetermined direction.Type: GrantFiled: May 23, 2014Date of Patent: April 21, 2015Assignee: Seiko Epson CorporationInventor: Osamu Okumura
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Publication number: 20140253820Abstract: A liquid crystal device includes a liquid crystal panel including a pair of substrates that sandwiches a liquid crystal layer containing liquid crystal molecules exhibiting a parallel alignment in an initial alignment state, and a polarizing plate disposed on either side of the liquid crystal panel. The liquid crystal molecules are inclined at a pretilt angle and aligned in a predetermined direction in planes of the substrates. The liquid crystal panel emits light entering through one of the polarizing plates toward the other. The liquid crystal panel emits light having the maximum intensity in a direction different from a direction normal to the substrates. The azimuth of the maximum-light-intensity direction projected onto the planes of the substrates is substantially parallel to the predetermined direction.Type: ApplicationFiled: May 23, 2014Publication date: September 11, 2014Applicant: SEIKO EPSON CORPORATIONInventor: Osamu OKUMURA
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Patent number: 8773621Abstract: A liquid crystal device includes a liquid crystal panel including a pair of substrates that sandwiches a liquid crystal layer containing liquid crystal molecules exhibiting a parallel alignment in an initial alignment state, and a polarizing plate disposed on either side of the liquid crystal panel. The liquid crystal molecules are inclined at a pretilt angle and aligned in a predetermined direction in planes of the substrates. The liquid crystal panel emits light entering through one of the polarizing plates toward the other. The liquid crystal panel emits light having the maximum intensity in a direction different from a direction normal to the substrates. The azimuth of the maximum-light-intensity direction projected onto the planes of the substrates is substantially parallel to the predetermined direction.Type: GrantFiled: February 13, 2009Date of Patent: July 8, 2014Assignee: Seiko Epson CorporationInventor: Osamu Okumura
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Patent number: 8690338Abstract: A reflective liquid crystal projector according to the aspect of the invention includes a light source, a reflective liquid crystal panel, and a wire grid polarization beam splitter element. The wire grid polarization beam splitter element is provided with a polarization beam split surface that reflects a first polarized light component and transmits a second polarized light component. The reflective liquid crystal projector also includes a projection optical system that projects the first polarized light component, and an aperture stop that is disposed on an optical path of the light beam emitted from the light source. The aperture stop limits the amount of first light more than that of second light. The first light is divergent from the reflective liquid crystal panel to the polarization beam split surface. The second light is divergent from the reflective liquid crystal panel to the polarization beam split surface.Type: GrantFiled: January 20, 2011Date of Patent: April 8, 2014Assignee: Seiko Epson CorporationInventor: Osamu Okumura
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Patent number: 8537289Abstract: A projector includes an illumination optical system capable of emitting first light and second light of a wavelength longer than that of the first light; a first liquid crystal panel constituted so as to include a first liquid crystal layer and capable of modulating the first light emitted from the illumination optical system; a second liquid crystal panel constituted so as to include a second liquid crystal layer having a transition temperature from a liquid crystal phase to an isotropic phase higher than that of the first liquid crystal layer and capable of modulating the second light emitted from the illumination optical system; a projection optical system projecting the first light modulated by the first liquid crystal panel and the second light modulated by the second liquid crystal panel; and a cooling mechanism for cooling the first liquid crystal layer.Type: GrantFiled: February 22, 2012Date of Patent: September 17, 2013Assignee: Seiko Epson CorporationInventor: Osamu Okumura
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Publication number: 20120229715Abstract: A projector includes an illumination optical system capable of emitting first light and second light of a wavelength longer than that of the first light; a first liquid crystal panel constituted so as to include a first liquid crystal layer and capable of modulating the first light emitted from the illumination optical system; a second liquid crystal panel constituted so as to include a second liquid crystal layer having a transition temperature from a liquid crystal phase to an isotropic phase higher than that of the first liquid crystal layer and capable of modulating the second light emitted from the illumination optical system; a projection optical system projecting the first light modulated by the first liquid crystal panel and the second light modulated by the second liquid crystal panel; and a cooling mechanism for cooling the first liquid crystal layer.Type: ApplicationFiled: February 22, 2012Publication date: September 13, 2012Applicant: Sieko Epson CorporationInventor: Osamu Okumura
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Patent number: 8130344Abstract: A liquid crystal device includes: a liquid crystal layer which is sandwiched between a pair of substrates; a color filter layer has a first coloration layer for transmitting a first light and a second coloration layer for transmitting a second light; first electrodes has a first pixel electrode disposed on a first sub-pixel region corresponding to a planar region of the first coloration layer and a second pixel electrode disposed on a second sub-pixel region corresponding to a planar region of the second coloration layer; and second electrodes each of which faces each first electrode. Any one electrode of each first electrode and each second electrode has a plurality of band-like portions which are arranged at predetermined intervals. A layer thickness of the liquid crystal layer, a width of each band-like portion, and the predetermined intervals within the first sub-pixel region are smaller than they within the second sub-pixel region.Type: GrantFiled: July 29, 2009Date of Patent: March 6, 2012Assignee: Seiko Epson CorporationInventors: Hitoshi Tsuchiya, Tomo Ikebe, Osamu Okumura
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Publication number: 20110194057Abstract: A reflection type liquid crystal device has: a liquid crystal cell held between a pair of substrates and an optical compensation plate disposed outside the pair of substrates. The optical compensation plate has a first optical axis along the thickness direction thereof. The liquid crystal cell has a pretilt at which a second optical axis of a liquid crystal molecule of the liquid crystal cell is inclined with respect to a plate surface of the liquid crystal cell. The optical compensation plate is tiltable in a first direction in which a standard angle becomes larger, wherein the standard angle is defined as an acute angle between the first optical axis and the second optical axis when the optical compensation plate is located parallel to the plate surface of the liquid crystal cell.Type: ApplicationFiled: February 3, 2011Publication date: August 11, 2011Applicant: SEIKO EPSON CORPORATIONInventors: Akihide HARUYAMA, Osamu OKUMURA
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Patent number: 7995163Abstract: A liquid crystal device includes a pair of substrates and a liquid crystal layer between the pair of substrates. In addition, the device includes a plurality of dots capable of independently applying voltage to the liquid crystal layer, each dot having a dot area that includes a first section and a second section. A color filter is arranged in the first section of at least one of the dots. A substantially transparent area is arranged in the at least one of the dots in the second section where the color filter is not arranged.Type: GrantFiled: October 25, 2010Date of Patent: August 9, 2011Assignee: Seiko Epson CorporationInventors: Osamu Okumura, Eiji Okamoto, Tsuyoshi Maeda, Toshiharu Matsushima