Patents by Inventor James Ibbetson
James Ibbetson 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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Publication number: 20240074013Abstract: A lighting fixture appears as a skylight and is referred to as a skylight fixture. First and second light engines of the fixture provide different color points, peak light intensity angles, far-field light distribution characteristics, and/or circadian stimulus values. A skylight fixture may include a sky-resembling assembly and a plurality of sun-resembling assemblies, with dedicated optical assemblies and/or light sources. A lighting fixture may include multiple waveguides that different extraction feature patterns and/or may be sequentially arranged.Type: ApplicationFiled: August 14, 2023Publication date: February 29, 2024Inventors: Bernd P. Keller, Michael Leung, Benjamin A. Jacobson, Eric Tarsa, James Ibbetson, Claudio Girotto, Amruteshwar Hiremath
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Patent number: 11729877Abstract: A lighting fixture appears as a skylight and is referred to as a skylight fixture. First and second light engines of the fixture provide different color points, peak light intensity angles, far-field light distribution characteristics, and/or circadian stimulus values. A skylight fixture may include a sky-resembling assembly and a plurality of sun-resembling assemblies, with dedicated optical assemblies and/or light sources. A lighting fixture may include multiple waveguides that different extraction feature patterns and/or may be sequentially arranged.Type: GrantFiled: October 12, 2021Date of Patent: August 15, 2023Assignee: IDEAL Industries Lighting LLCInventors: Bernd P. Keller, Michael Leung, Benjamin A. Jacobson, Eric Tarsa, James Ibbetson, Claudio Girotto
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Patent number: 11638339Abstract: A light fixture, e.g., as an artificial skylight, in which light within a region defined by x, y color coordinates (0.37, 0.34), (0.35, 0.38), (0.15, 0.20), and (0.20, 0.14) exits a first light engine, and light within a region defined by coordinates (0.29, 0.32), (0.32, 0.29), (0.41, 0.36), (0.48, 0.39), (0.48, 0.43), (0.40, 0.41), and (0.35, 0.38) exits a second light engine. Also, light fixtures in which a second light engine comprises a sidewall, and light exiting a first light engine passes through space defined by the sidewall; light fixtures in which first and second light engines are able to output light providing different CS values at a luminance; light fixtures in which light incident on a surface of the fixture and cumulative light exiting the fixture have different color points; light fixtures in which light distribution characteristics of light engines differ; and/or other features. The invention also relates to corresponding methods.Type: GrantFiled: December 14, 2020Date of Patent: April 25, 2023Assignee: IDEAL INDUSTRIES LIGHTING LLCInventors: Michael Leung, Ben Jacobson, Eric Tarsa, James Ibbetson, Claudio Girotto, Bernd Keller
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Patent number: 11251164Abstract: Light emitting diodes are disclosed that utilize multiple conversion materials in the conversion process in order to achieve the desired emission color point. Different embodiments of the present invention can comprise different phosphor types in separate layers on, above or around one or a plurality of LED chips to achieve the desired light conversion. The LEDs can then emit a desired combination of light from the LED chips and conversion material. In some embodiments, conversion materials can be applied as layers of different phosphor types in order of longest emission wavelength phosphor first, followed by shorter emission phosphors in sequence as opposed to applying in a homogeneously mixed phosphor converter. The conversion material layers can be applied as a blanket over the LED chips and the area surrounding the chip, such as the surface of a submount holding the LED chips.Type: GrantFiled: August 6, 2014Date of Patent: February 15, 2022Assignee: CreeLED, Inc.Inventors: Fan Zhang, James Ibbetson, Bernd Keller, Thodore Lowes, Antony Van De Ven, Deborah Kircher, Tao Feng Gilbert, Peter Andrews
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Publication number: 20220026052Abstract: A lighting fixture appears as a skylight and is referred to as a skylight fixture. First and second light engines of the fixture provide different color points, peak light intensity angles, far-field light distribution characteristics, and/or circadian stimulus values. A skylight fixture may include a sky-resembling assembly and a plurality of sun-resembling assemblies, with dedicated optical assemblies and/or light sources. A lighting fixture may include multiple waveguides that different extraction feature patterns and/or may be sequentially arranged.Type: ApplicationFiled: October 12, 2021Publication date: January 27, 2022Inventors: Bernd P. Keller, Theodore D. Lowes, Michael Leung, Benjamin A. Jacobson, Eric Tarsa, James Ibbetson, Claudio Girotto, Matthew Berry
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Patent number: 11209138Abstract: A lighting fixture appears as a skylight and is referred to as a skylight fixture. The skylight fixture has a sky-resembling assembly and a plurality of sun-resembling assemblies. The sky-resembling assembly has a sky-resembling optical assembly and a sky-specific light source, wherein light from the sky-specific light source exits a planar interior surface of the sky-resembling light optical assembly as skylight light. The plurality of sun-resembling assemblies are arranged adjacent one another and extend downward from a periphery of the sky-resembling assembly. Each of the plurality of sun-resembling assemblies has a sun-resembling optical assembly and a sun-specific light source, wherein light from the sun-specific light source exits a planar interior surface of the sun-resembling optical assembly as sunlight light.Type: GrantFiled: August 11, 2020Date of Patent: December 28, 2021Assignee: IDEAL Industries Lighting LLCInventors: Bernd P. Keller, Theodore D. Lowes, Michael Leung, Benjamin A. Jacobson, Eric Tarsa, James Ibbetson, Claudio Girotto
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Publication number: 20210366880Abstract: Light emitting diodes are disclosed that utilize multiple conversion materials in the conversion process in order to achieve the desired emission color point. Different embodiments of the present invention can comprise different phosphor types in separate layers on, above or around one or a plurality of LED chips to achieve the desired light conversion. The LEDs can then emit a desired combination of light from the LED chips and conversion material. In some embodiments, conversion materials can be applied as layers of different phosphor types in order of longest emission wavelength phosphor first, followed by shorter emission phosphors in sequence as opposed to applying in a homogeneously mixed phosphor converter. The conversion material layers can be applied as a blanket over the LED chips and the area surrounding the chip, such as the surface of a submount holding the LED chips.Type: ApplicationFiled: August 6, 2014Publication date: November 25, 2021Inventors: FAN ZHANG, James IBBETSON, Bernd KELLER, Theodore LOWES, Antony VAN DE VEN, Deborah KIRCHER, Tao Feng GILBERT, Peter Andrews
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Publication number: 20210095825Abstract: A light fixture, e.g., as an artificial skylight, in which light within a region defined by x, y color coordinates (0.37, 0.34), (0.35, 0.38), (0.15, 0.20), and (0.20, 0.14) exits a first light engine, and light within a region defined by coordinates (0.29, 0.32), (0.32, 0.29), (0.41, 0.36), (0.48, 0.39), (0.48, 0.43), (0.40, 0.41), and (0.35, 0.38) exits a second light engine. Also, light fixtures in which a second light engine comprises a sidewall, and light exiting a first light engine passes through space defined by the sidewall; light fixtures in which first and second light engines are able to output light providing different CS values at a luminance; light fixtures in which light incident on a surface of the fixture and cumulative light exiting the fixture have different color points; light fixtures in which light distribution characteristics of light engines differ; and/or other features. The invention also relates to corresponding methods.Type: ApplicationFiled: December 14, 2020Publication date: April 1, 2021Applicant: IDEAL INDUSTRIES LIGHTING LLCInventors: Michael Leung, Ben Jacobson, Eric Tarsa, James Ibbetson, Claudio Girotto, Bernd Keller
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Patent number: 10900621Abstract: A light fixture, e.g., as an artificial skylight, in which light within a region defined by x, y color coordinates (0.37, 0.34), (0.35, 0.38), (0.15, 0.20), and (0.20, 0.14) exits a first light engine, and light within a region defined by coordinates (0.29, 0.32), (0.32, 0.29), (0.41, 0.36), (0.48, 0.39), (0.48, 0.43), (0.40, 0.41), and (0.35, 0.38) exits a second light engine. Also, light fixtures in which a second light engine comprises a sidewall, and light exiting a first light engine passes through space defined by the sidewall; light fixtures in which first and second light engines are able to output light providing different CS values at a luminance; light fixtures in which light incident on a surface of the fixture and cumulative light exiting the fixture have different color points; light fixtures in which light distribution characteristics of light engines differ; and/or other features. The invention also relates to corresponding methods.Type: GrantFiled: October 29, 2019Date of Patent: January 26, 2021Assignee: IDEAL Industries Lighting LLCInventors: Michael Leung, Ben Jacobson, Eric Tarsa, James Ibbetson, Claudio Girotto, Bernd Keller
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Publication number: 20200370719Abstract: A lighting fixture appears as a skylight and is referred to as a skylight fixture. The skylight fixture has a sky-resembling assembly and a plurality of sun-resembling assemblies. The sky-resembling assembly has a sky-resembling optical assembly and a sky-specific light source, wherein light from the sky-specific light source exits a planar interior surface of the sky-resembling light optical assembly as skylight light. The plurality of sun-resembling assemblies are arranged adjacent one another and extend downward from a periphery of the sky-resembling assembly. Each of the plurality of sun-resembling assemblies has a sun-resembling optical assembly and a sun-specific light source, wherein light from the sun-specific light source exits a planar interior surface of the sun-resembling optical assembly as sunlight light.Type: ApplicationFiled: August 11, 2020Publication date: November 26, 2020Inventors: Bernd P. Keller, Theodore D. Lowes, Michael Leung, Benjamin A. Jacobson, Eric Tarsa, James Ibbetson, Claudio Girotto
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Patent number: 10781984Abstract: A lighting fixture appears as a skylight and is referred to as a skylight fixture. The skylight fixture has a sky-resembling assembly and a plurality of sun-resembling assemblies. The sky-resembling assembly has a sky-resembling optical assembly and a sky-specific light source, wherein light from the sky-specific light source exits a planar interior surface of the sky-resembling light optical assembly as skylight light. The plurality of sun-resembling assemblies are arranged adjacent one another and extend downward from a periphery of the sky-resembling assembly. Each of the plurality of sun-resembling assemblies has a sun-resembling optical assembly and a sun-specific light source, wherein light from the sun-specific light source exits a planar interior surface of the sun-resembling optical assembly as sunlight light.Type: GrantFiled: October 18, 2019Date of Patent: September 22, 2020Assignee: IDEAL Industries Lighting LLCInventors: Bernd P. Keller, Theodore D. Lowes, Michael Leung, Benjamin A. Jacobson, Eric Tarsa, James Ibbetson, Claudio Girotto
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Publication number: 20200063927Abstract: A light fixture, e.g., as an artificial skylight, in which light within a region defined by x, y color coordinates (0.37, 0.34), (0.35, 0.38), (0.15, 0.20), and (0.20, 0.14) exits a first light engine, and light within a region defined by coordinates (0.29, 0.32), (0.32, 0.29), (0.41, 0.36), (0.48, 0.39), (0.48, 0.43), (0.40, 0.41), and (0.35, 0.38) exits a second light engine. Also, light fixtures in which a second light engine comprises a sidewall, and light exiting a first light engine passes through space defined by the sidewall; light fixtures in which first and second light engines are able to output light providing different CS values at a luminance; light fixtures in which light incident on a surface of the fixture and cumulative light exiting the fixture have different color points; light fixtures in which light distribution characteristics of light engines differ; and/or other features. The invention also relates to corresponding methods.Type: ApplicationFiled: October 29, 2019Publication date: February 27, 2020Applicant: IDEAL INDUSTRIES LIGHTING LLCInventors: Michael LEUNG, Ben Jacobson, Eric Tarsa, James Ibbetson, Claudio Girotto, Bernd Keller
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Publication number: 20200049318Abstract: A lighting fixture appears as a skylight and is referred to as a skylight fixture. The skylight fixture has a sky-resembling assembly and a plurality of sun-resembling assemblies. The sky-resembling assembly has a sky-resembling optical assembly and a sky-specific light source, wherein light from the sky-specific light source exits a planar interior surface of the sky-resembling light optical assembly as skylight light. The plurality of sun-resembling assemblies are arranged adjacent one another and extend downward from a periphery of the sky-resembling assembly. Each of the plurality of sun-resembling assemblies has a sun-resembling optical assembly and a sun-specific light source, wherein light from the sun-specific light source exits a planar interior surface of the sun-resembling optical assembly as sunlight light.Type: ApplicationFiled: October 18, 2019Publication date: February 13, 2020Inventors: Bernd P. Keller, Theodore D. Lowes, Michael Leung, Benjamin A. Jacobson, Eric Tarsa, James Ibbetson, Claudio Girotto
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Patent number: 10546978Abstract: A light emitting diode (LED) is disclosed comprising a plurality of semiconductor layers with a first contact on the bottom surface of the semiconductor layers and a second contact on the top surface of the semiconductor layer. A coating is included that comprises a cured binder and a conversion material that at least partially covers the semiconductor layers, wherein the second contact extends through the coating and is exposed on the same plane as the top surface of the coating. An electrical signal applied to the first and second contacts is conducted through the coating to the semiconductor layers causing the LED to emit light. In other embodiments first and second contacts are accessible from one side of the LED. A coating is included that comprises a cured binder and a conversion material. The coating at least partially covers the semiconductor layers, with the first and second contacts extending through the coating and exposed on the same plane as a surface of the coating.Type: GrantFiled: July 21, 2009Date of Patent: January 28, 2020Assignee: Cree, Inc.Inventors: Michael S. Leung, Eric J. Tarsa, James Ibbetson
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Solid state lighting device providing spectral power distribution with enhanced perceived brightness
Patent number: 10529900Abstract: A solid state lighting device includes at least one electrically activated solid state light emitter configured to stimulate emissions of first through third lumiphoric materials having peak wavelengths in ranges of from 485 nm to 530 nm, from 575 nm to 595 nm, and from 605 nm to 640 nm, respectively (or subranges thereof defined herein), with the third peak having a full width half maximum value of less than 60 nm. The resulting device generates aggregated emissions having a suitably high color rendering index (e.g., CRI Ra) value (e.g., at least 70), and also having a spectral power distribution with a Melanopic/Photopic ratio within a specified target range as a function of correlated color temperature, thereby providing increased perceived brightness.Type: GrantFiled: May 5, 2018Date of Patent: January 7, 2020Assignee: IDEAL Industries Lighting LLCInventors: Fan Zhang, Ryan Gresback, James Ibbetson, Bernd Keller, Antony Paul Van De Ven -
Patent number: 10502374Abstract: A light fixture, e.g., as an artificial skylight, in which light within a region defined by x, y color coordinates (0.37, 0.34), (0.35, 0.38), (0.15, 0.20), and (0.20, 0.14) exits a first light engine, and light within a region defined by coordinates (0.29, 0.32), (0.32, 0.29), (0.41, 0.36), (0.48, 0.39), (0.48, 0.43), (0.40, 0.41), and (0.35, 0.38) exits a second light engine. Also, light fixtures in which a second light engine comprises a sidewall, and light exiting a first light engine passes through space defined by the sidewall; light fixtures in which first and second light engines are able to output light providing different CS values at a luminance; light fixtures wherein light incident on a surface of the fixture and cumulative light exiting the fixture have different color points; light fixtures wherein light distribution characteristics of light engines differ; and/or other features. The invention also relates to corresponding methods.Type: GrantFiled: January 30, 2017Date of Patent: December 10, 2019Assignee: IDEAL Industries Lighting LLCInventors: Michael Leung, Ben Jacobson, Eric Tarsa, James Ibbetson, Claudio Girotto, Bernd Keller
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Patent number: 10505083Abstract: Methods for fabricating a semiconductor devices, and in particular light emitting diodes (LEDS) comprising providing a plurality of semiconductor devices on a substrate and forming a contact on at least some of the semiconductor devices. A containment structure is formed on at least some of the semiconductor devices having a contact with each containment structure defining a deposition area excluding the contact. A coating material is deposited then within the deposition area, with the coating material not covering the contact. A light emitting diode (LED) chip wafer comprising a plurality of LEDs on a substrate wafer with at least some of the LEDs having a contact. A plurality of containment structures are included, each of which is associated with a respective one of the plurality of LEDs. Each of the containment structures at least partially on its respective one of the LEDs and defining a deposition area on its respective one of the LEDs. The deposition area excludes the contact.Type: GrantFiled: July 11, 2007Date of Patent: December 10, 2019Assignee: CREE, INC.Inventors: James Ibbetson, Kristi Wong, Maryanne Becerra
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SOLID STATE LIGHTING DEVICE PROVIDING SPECTRAL POWER DISTRIBUTION WITH ENHANCED PERCEIVED BRIGHTNESS
Publication number: 20190341531Abstract: A solid state lighting device includes at least one electrically activated solid state light emitter configured to stimulate emissions of first through third lumiphoric materials having peak wavelengths in ranges of from 485 nm to 530 nm, from 575 nm to 595 nm, and from 605 nm to 640 nm, respectively (or subranges thereof defined herein), with the third peak having a full width half maximum value of less than 60 nm. The resulting device generates aggregated emissions having a suitably high color rendering index (e.g., CRI Ra) value (e.g., at least 70), and also having a spectral power distribution with a Melanopic/Photopic ratio within a specified target range as a function of correlated color temperature, thereby providing increased perceived brightness.Type: ApplicationFiled: May 5, 2018Publication date: November 7, 2019Inventors: Fan Zhang, Ryan Gresback, James Ibbetson, Bernd Keller, Antony Paul Van de Ven -
Patent number: 10465869Abstract: A lighting fixture appears as a skylight and is referred to as a skylight fixture. The skylight fixture has a sky-resembling assembly and a plurality of sun-resembling assemblies. The sky-resembling assembly has a sky-resembling optical assembly and a sky-specific light source, wherein light from the sky-specific light source exits a planar interior surface of the sky-resembling light optical assembly as skylight light. The plurality of sun-resembling assemblies are arranged adjacent one another and extend downward from a periphery of the sky-resembling assembly. Each of the plurality of sun-resembling assemblies has a sun-resembling optical assembly and a sun-specific light source, wherein light from the sun-specific light source exits a planar interior surface of the sun-resembling optical assembly as sunlight light.Type: GrantFiled: May 6, 2018Date of Patent: November 5, 2019Assignee: IDEAL Industries Lighting LLCInventors: Bernd P. Keller, Theodore D. Lowes, Michael Leung, Benjamin A. Jacobson, Eric Tarsa, James Ibbetson, Claudio Girotto
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Patent number: 10451229Abstract: A lighting fixture appears as a skylight and is referred to as a skylight fixture. The skylight fixture has a sky-resembling assembly and a plurality of sun-resembling assemblies. The sky-resembling assembly has a sky-resembling optical assembly and a sky-specific light source, wherein light from the sky-specific light source exits a planar interior surface of the sky-resembling light optical assembly as skylight light. The plurality of sun-resembling assemblies are arranged adjacent one another and extend downward from a periphery of the sky-resembling assembly. Each of the plurality of sun-resembling assemblies has a sun-resembling optical assembly and a sun-specific light source, wherein light from the sun-specific light source exits a planar interior surface of the sun-resembling optical assembly as sunlight light.Type: GrantFiled: May 6, 2018Date of Patent: October 22, 2019Assignee: IDEAL Industries Lighting LLCInventors: Bernd P. Keller, Theodore D. Lowes, Michael Leung, Benjamin A. Jacobson, Eric Tarsa, James Ibbetson, Claudio Girotto