Patents by Inventor Ronan Letoquin
Ronan Letoquin 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: 20230316635Abstract: In various examples, an environment surrounding an ego-object is visualized using an adaptive 3D bowl that models the environment with a shape that changes based on distance (and direction) to one or more representative point(s) on detected objects. Distance (and direction) to detected objects may be determined using 3D object detection or a top-down 2D or 3D occupancy grid, and used to adapt the shape of the adaptive 3D bowl in various ways (e.g., by sizing its ground plane to fit within the distance to the closest detected object, fitting a shape using an optimization algorithm). The adaptive 3D bowl may be enabled or disabled during each time slice (e.g., based on ego-speed), and the 3D bowl for each time slice may be used to render a visualization of the environment (e.g., a top-down projection image, a textured 3D bowl, and/or a rendered view thereof).Type: ApplicationFiled: February 23, 2023Publication date: October 5, 2023Inventors: Hairong JIANG, Nuri Murat ARAR, Orazio GALLO, Jan KAUTZ, Ronan LETOQUIN
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Patent number: 11508892Abstract: This specification discloses heatsinks comprising a continuous sheet of thermally conductive material folded into a structure comprising a plurality of fins defined by bends in the sheet and arranged to transfer heat to surrounding air. The sheet may be further folded to form a planar surface defined by one or more bends in the sheet and on which one or more LEDs may be mounted. Optionally, the sheet may be further folded to partially enclose the fins within a tunnel formed by side walls defined by bends in the sheet.Type: GrantFiled: April 27, 2020Date of Patent: November 22, 2022Assignee: Lumileds LLCInventors: Jeroen Den Breejen, Zongjie Yuan, Ronan Letoquin
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Publication number: 20200343427Abstract: This specification discloses heatsinks comprising a continuous sheet of thermally conductive material folded into a structure comprising a plurality of fins defined by bends in the sheet and arranged to transfer heat to surrounding air. The sheet may be further folded to form a planar surface defined by one or more bends in the sheet and on which one or more LEDs may be mounted. Optionally, the sheet may be further folded to partially enclose the fins within a tunnel formed by side walls defined by bends in the sheet.Type: ApplicationFiled: April 27, 2020Publication date: October 29, 2020Applicant: LUMILEDS LLCInventors: Jeroen DEN BREEJEN, Zongjie YUAN, Ronan LETOQUIN
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Patent number: 10359151Abstract: Lamps and bulbs are disclosed generally comprising different combinations and arrangements of a light source, one or more wavelength conversion materials, regions or layers which are positioned separately or remotely with respect to the light source, and a separate diffusing layer. This arrangement allows for the fabrication of lamps and bulbs that are efficient, reliable and cost effective and can provide an essentially omni-directional emission pattern, even with a light source comprised of a co-planar arrangement of LEDs. The lamps according to the present invention can also comprise thermal management features that provide for efficient dissipation of heat from the LEDs, which in turn allows the LEDs to operate at lower temperatures. The lamps can also comprise optical elements to help change the emission pattern from the generally directional (e.g. Lambertian) pattern of the LEDs to a more omni-directional pattern.Type: GrantFiled: February 16, 2011Date of Patent: July 23, 2019Assignee: IDEAL INDUSTRIES LIGHTING LLCInventors: Eric Tarsa, Ronan Letoquin, Tao Tong, Bernd Keller
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Patent number: 9500325Abstract: An LED lamp or bulb is disclosed that comprises a light source, a heat sink structure and a remote planar phosphor carrier having at least one conversion material. The phosphor carrier can be remote to the light sources and mounted to the heat sink so that heat from the phosphor carrier spreads into the heat sink. The phosphor carrier can comprise a thermally conductive transparent material and a phosphor layer, with an LED based light source mounted to the heat sink such that light from the light source passes through the phosphor carrier. At least some of the LED light is converted by the phosphor carrier, with some lamp embodiments emitting a white light combination of LED and phosphor light. The phosphor arranged according to the present invention can operate at lower temperature to thereby operate at greater phosphor conversion efficiency and with reduced heat related damage to the phosphor.Type: GrantFiled: February 16, 2011Date of Patent: November 22, 2016Assignee: CREE, INC.Inventors: Tao Tong, Ronan Letoquin, Bernd Keller, Eric Tarsa
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Patent number: 9310030Abstract: A lighting device comprising a light source and a diffuser spaced from the light source. The lighting device further comprises a wavelength conversion material disposed between the light source and the diffuser and spaced from the light source and the diffuser, wherein the diffuser is shaped such that there are different distances between the diffuser and said conversion material at different emission angles. In other embodiments the diffuser includes areas with different diffusing characteristics. Some lamps are arranged to meet A19 and Energy Star lighting standards.Type: GrantFiled: October 8, 2010Date of Patent: April 12, 2016Assignee: CREE, INC.Inventors: Tao Tong, Ronan Letoquin, Bernd Keller, Eric Tarsa, Mark Youmans, Theodore Lowes, Nicholas W. Medendorp, Jr., Antony Van De Ven, Gerald Negley, Peter Guschl, Zongjie Yuan
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Patent number: 9275979Abstract: LED packages, and LED lamps and bulbs, are disclosed that are arranged to minimize the CRI and efficiency losses resulting from the overlap of conversion material emission and excitation spectrum. In different devices having conversion materials with this overlap, the present invention arranges the conversion materials to reduce the likelihood that re-emitted light from a first conversion materials will encounter the second conversion material to minimize the risk of re-absorption. In some embodiments this risk is minimized by different arrangements where there is separation between the two phosphors. In some embodiments this separation results less than 50% of re-emitted light from the one phosphor passing into the phosphor where it risks re-absorption.Type: GrantFiled: February 16, 2011Date of Patent: March 1, 2016Assignee: CREE, INC.Inventors: Tao Tong, Ronan LeToquin, Bernd Keller, James Ibbetson, Gerald Negley
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Patent number: 9217544Abstract: LED based lamps and bulbs are disclosed that comprise a pedestal having a plurality of LEDs, wherein the pedestal at least partially comprises a thermally conductive material. A heat sink structure is included with the pedestal thermally coupled to the heat sink structure. A remote phosphor is arranged in relation to the LEDs so that at least some light from the LEDs passes through the remote phosphor and is converted to a different wavelength of light. Some lamp or bulb embodiments can emit a white light combination of light from the LEDs and the remote phosphor. These can include LEDs emitting blue light with the remote phosphor having a material that absorbs blue light and emits yellow or green light. A diffuser can be included to diffuse the emitting light into the desired pattern, such as omnidirectional.Type: GrantFiled: August 29, 2013Date of Patent: December 22, 2015Assignee: CREE, INC.Inventors: Tao Tong, Ronan LeToquin, Bernd Keller, Theodore Lowes, Eric Tarsa, Mark Youmans
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Patent number: 9062830Abstract: Solid state lamps and bulbs comprising different combinations and arrangements of a light source, one or more wavelength conversion materials, regions or layers which are positioned separately or remotely with respect to the light source, and a separate diffuser. These are arranged on a heat sink in a manner that allows for the fabrication of lamps and bulbs that are efficient, reliable and cost effective and can provide an essentially omnidirectional emission pattern, even with a light source comprised of a co-planar arrangement of LEDs. Additionally, this arrangement allows aesthetic masking or concealment of the appearance of the conversion regions or layers when the lamp is not illuminated. Various embodiments of the invention may be used to address many of the difficulties associated with utilizing efficient solid state light sources such as LEDs in the fabrication of lamps or bulbs suitable for direct replacement of traditional incandescent bulbs.Type: GrantFiled: February 16, 2011Date of Patent: June 23, 2015Assignee: Cree, Inc.Inventors: Long Larry Le, Paul Pickard, James Michael Lay, Tao Tong, Ronan Letoquin, Bernd Keller, Eric Tarsa, Mark Youmans, Theodore Lowes, Nicholas W. Medendorp, Jr., Antony Van De Ven, Gerald Negley
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Patent number: 9057511Abstract: Solid state lamps and bulbs comprising different combinations and arrangements of a light source, one or more wavelength conversion materials, regions or layers which are positioned separately or remotely with respect to the light source, and a separate diffuser. These are arranged on a heat sink in a manner that allows for the fabrication of lamps and bulbs that are efficient, reliable and cost effective and can provide an essentially omni-directional emission pattern, even with a light source comprised of a co-planar arrangement of LEDs. Additionally, this arrangement allows aesthetic masking or concealment of the appearance of the conversion regions or layers when the lamp is not illuminated. Various embodiments of the invention may be used to address many of the difficulties associated with utilizing efficient solid state light sources such as LEDs in the fabrication of lamps or bulbs suitable for direct replacement of traditional incandescent bulbs.Type: GrantFiled: February 24, 2011Date of Patent: June 16, 2015Assignee: Cree, Inc.Inventors: Long Larry Le, Ronan Letoquin, Bernd Keller, Eric Tarsa, Paul Pickard, James Michael Lay, Tao Tong, Mark Youmans, Theodore Lowes, Nicholas W. Medendorp, Jr., Antony Van De Ven, Gerald Negley
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Patent number: 9024517Abstract: Lamps and bulbs are disclosed generally comprising different combinations and arrangement of a light source, one or more wavelength conversion materials, regions or layers which are positioned separately or remotely with respect to the light source, and a separate diffusing layer. This arrangement allows for the fabrication of lamps and bulbs that are efficient, reliable and cost effective and can provide an essentially omni-directional emission pattern, even with a light source comprised of a co-planar arrangement of LEDs. Additionally, this arrangement allows aesthetic masking or concealment of the appearance of the conversion regions or layers when the lamp is not illuminated. Some embodiments of the present invention utilize LED chips to provide one or more lighting components instead of providing the components through phosphor conversion. This can provide for lamps that can be operated with lower power and can be manufactured at lower cost.Type: GrantFiled: February 16, 2011Date of Patent: May 5, 2015Assignee: Cree, Inc.Inventors: Zongjie Yuan, Eric Tarsa, Tao Tong, Ronan Letoquin, Bernd Keller, Long Larry Le, James Michael Lay, Randolph Cary Demuynck
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Patent number: 8632196Abstract: An LED lamp or bulb is disclosed that comprises a light source, a heat sink structure and a remote phosphor carrier having at least one conversion material. The phosphor carrier can be remote to the light sources and mounted to the heat sink so that heat from the phosphor carrier spreads into the heat sink. The phosphor carrier can have a three-dimensional shape, and can comprise a thermally conductive transparent material and a phosphor layer, with an LED based light source mounted to the heat sink such that light from the light source passes through the phosphor carrier. At least some of the LED light is converted by the phosphor carrier, with some lamp embodiments emitting a white light combination of LED and phosphor light. The phosphors in the phosphor carriers can be arranged to operate at a lower temperature to thereby operate at greater phosphor conversion efficiency and with reduced heat related damage to the phosphor.Type: GrantFiled: February 16, 2011Date of Patent: January 21, 2014Assignee: Cree, Inc.Inventors: Tao Tong, Ronan Letoquin, Bernd Keller, Eric Tarsa
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Publication number: 20140003048Abstract: LED based lamps and bulbs are disclosed that comprise a pedestal having a plurality of LEDs, wherein the pedestal at least partially comprises a thermally conductive material. A heat sink structure is included with the pedestal thermally coupled to the heat sink structure. A remote phosphor is arranged in relation to the LEDs so that at least some light from the LEDs passes through the remote phosphor and is converted to a different wavelength of light. Some lamp or bulb embodiments can emit a white light combination of light from the LEDs and the remote phosphor. These can include LEDs emitting blue light with the remote phosphor having a material that absorbs blue light and emits yellow or green light. A diffuser can be included to diffuse the emitting light into the desired pattern, such as omnidirectional.Type: ApplicationFiled: August 29, 2013Publication date: January 2, 2014Applicant: Cree, Inc.Inventors: Tao Tong, Ronan LeToquin, Bernd Keller, Theodore Lowes, Eric Tarsa, Mark Youmans
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Patent number: 8562161Abstract: LED based lamps and bulbs are disclosed that comprise a pedestal having a plurality of LEDs, wherein the pedestal at least partially comprises a thermally conductive material. A heat sink structure is included with the pedestal thermally coupled to the heat sink structure. A remote phosphor is arranged in relation to the LEDs so that at least some light from the LEDs passes through the remote phosphor and is converted to a different wavelength of light. Some lamp or bulb embodiments can emit a white light combination of light from the LEDs and the remote phosphor. These can include LEDs emitting blue light with the remote phosphor having a material that absorbs blue light and emits yellow or green light. A diffuser can be included to diffuse the emitting light into the desired pattern, such as omnidirectional.Type: GrantFiled: August 2, 2010Date of Patent: October 22, 2013Assignee: Cree, Inc.Inventors: Tao Tong, Ronan Letoquin, Bernd Keller, Theodore Lowes, Eric Tarsa, Mark Youmans
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Patent number: 8558252Abstract: Methods for fabricating semiconductor devices such as LED chips with emission wavelength correction and devices fabricated using these methods. Different embodiments include sequential coating methods that provide two or more coatings or layers of conversion material over LEDs, which can be done at the wafer level. The methods are particularly applicable to fabricating LED chips that emit a warm white light, which typically requires covering LEDs with one or more wavelength conversion materials such as phosphors. In one embodiment, a base wavelength conversion material is applied to the semiconductor devices. A portion of the base conversion material is removed. At least two different tuning wavelength conversion materials are also applied to the semiconductor devices, either before or after the application of the base conversion material.Type: GrantFiled: August 26, 2011Date of Patent: October 15, 2013Assignee: Cree, Inc.Inventors: James Ibbetson, Bernd Keller, Ronan Letoquin, Matthew Donofrio, Michael Bergmann
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Publication number: 20130049021Abstract: Methods for fabricating semiconductor devices such as LED chips with emission wavelength correction and devices fabricated using these methods. Different embodiments include sequential coating methods that provide two or more coatings or layers of conversion material over LEDs, which can be done at the wafer level. The methods are particularly applicable to fabricating LED chips that emit a warm white light, which typically requires covering LEDs with one or more wavelength conversion materials such as phosphors. In one embodiment, a base wavelength conversion material is applied to the semiconductor devices. A portion of the base conversion material is removed. At least two different tuning wavelength conversion materials are also applied to the semiconductor devices, either before or after the application of the base conversion material.Type: ApplicationFiled: August 26, 2011Publication date: February 28, 2013Inventors: JAMES IBBETSON, Bernd Keller, Ronan Letoquin, Matthew Donofrio, Michael Bergmann
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Publication number: 20130003346Abstract: Solid state modules and fixtures comprising different combinations and arrangements of a light source, one or more wavelength conversion materials, thermally conductive connection adapters allowing dissipation of heat outside of the module, and a remote power supply unit. This arrangement allows for greater thermal efficiency and reliability while employing solid state lighting and providing emission patterns that are equivalent with ENERGY STARĀ® standards. Some embodiments additionally place compensation circuits, previously included with power supply units, on the optical element itself, remote from the power supply unit. Various embodiments of the invention may be used to address many of the difficulties associated with utilizing efficient solid state light sources such as LEDs in the fabrication of lamps or bulbs suitable for direct replacement of traditional incandescent bulbs or fixtures using bulbs.Type: ApplicationFiled: June 28, 2012Publication date: January 3, 2013Inventors: RONAN LETOQUIN, PETER GUSCHL, JAMES IBBETSON, ERIC TARSA, TAO TONG, ZONGJIE YUAN, BERND KELLER
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Publication number: 20120057327Abstract: Solid state lamps and bulbs comprising different combinations and arrangements of a light source, one or more wavelength conversion materials, regions or layers which are positioned separately or remotely with respect to the light source, and a separate diffuser. These are arranged on a heat sink in a manner that allows for the fabrication of lamps and bulbs that are efficient, reliable and cost effective and can provide an essentially omni-directional emission pattern, even with a light source comprised of a co-planar arrangement of LEDs. Additionally, this arrangement allows aesthetic masking or concealment of the appearance of the conversion regions or layers when the lamp is not illuminated. Various embodiments of the invention may be used to address many of the difficulties associated with utilizing efficient solid state light sources such as LEDs in the fabrication of lamps or bulbs suitable for direct replacement of traditional incandescent bulbs.Type: ApplicationFiled: February 24, 2011Publication date: March 8, 2012Inventors: LONG LARRY LE, Ronan Letoquin, Bernd Keller, Eric Tarsa, Paul Pickard, James Michael Lay, Tao Tong, Mark Youmans, Theodore Lowes, Nicholas W. Medendorp, JR., Antony Van de Ven, Gerald Negley
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Patent number: D653365Type: GrantFiled: December 19, 2010Date of Patent: January 31, 2012Assignee: Cree, Inc.Inventors: Zongjie Yuan, Eric Tarsa, Tao Tong, Ronan LeToquin, Bernd Keller
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Patent number: D654193Type: GrantFiled: September 24, 2010Date of Patent: February 14, 2012Assignee: Cree. Inc.Inventors: Tao Tong, Ronan Letoquin, Bernd Keller, Eric Tarsa, Mark Youmans, Theodore Lowes, Nicholas W. Medendorp, Jr., Antony Van De Ven, Gerald Negley, Zongjie Yuan