Patents by Inventor Antony P. van de Ven

Antony P. van de Ven 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: 10349484
    Abstract: Solid state lighting devices with melatonin suppression characteristics that ameliorate or reduce symptoms of circadian rhythm disorders or other health conditions. Aspects disclosed herein additionally relate to providing one or more of the foregoing effects while maintaining color rendering index (CRI) values acceptably high for the intended use, as well as providing lighting devices with high luminous efficacy and enhanced energy efficiency. A solid state lighting device includes one or more solid state emitters and one or more lumiphoric materials that provide aggregated emissions of the solid state lighting device. The aggregated emissions have a warm correlated color temperature (CCT) with a color point that is off of the blackbody locus (BBL) by a certain distance.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: July 9, 2019
    Assignee: CREE, INC.
    Inventors: Fan Zhang, Ryan Gresback, Antony Paul van de Ven, Robert Glass, Bernd P. Keller
  • Patent number: 10264637
    Abstract: A lighting apparatus includes a string of serially-connected light emitting devices and a bypass circuit coupled to first and second nodes of the string and configured to variably conduct a bypass current around at least one of the light-emitting devices responsive to a temperature and/or a total current in the string. In some embodiments, the bypass circuit includes a variable resistance circuit coupled to the first and second nodes of the string and configured to variably conduct the bypass current around the at least one of the light-emitting devices responsive to a control voltage applied to a control node and a compensation circuit coupled to the control node and configured to vary the control voltage responsive to a temperature and/or total string current.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: April 16, 2019
    Assignee: Cree, Inc.
    Inventors: Antony P. van de Ven, Gerald H. Negley, Michael James Harris, Paul Kenneth Pickard, Joseph Paul Chobot, Terry Given
  • Patent number: 10209429
    Abstract: A luminaire comprises at least one waveguide having a first region that emits a first luminous intensity pattern and a second region that emits a second luminous intensity pattern different from the first luminous intensity pattern. The luminaire further includes a plurality of LED elements and circuitry to control the plurality of LED elements to cause the luminaire to produce a selected one of a plurality of luminous intensity patterns.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: February 19, 2019
    Assignee: Cree, Inc.
    Inventors: Antony P. van de Ven, Eric J. Tarsa, Bernd P. Keller, Benjamin A. Jacobson, Jean-Claude David Ramey de Sugny
  • Patent number: 10187942
    Abstract: A method of controlling a solid state lighting apparatus can be provided by receiving a solid state lighting characteristic selection signal at a solid state lighting apparatus and selecting, responsive to the solid state lighting characteristic selection signal, a solid state lighting model that defines a relationship between different lighting parameters used to vary light output from the solid state lighting apparatus responsive to a user input provided to the solid state lighting apparatus.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: January 22, 2019
    Assignee: Cree, Inc.
    Inventors: Antony P. van de Ven, Joseph Paul Chobot
  • Patent number: 10178723
    Abstract: A lighting apparatus includes at least two sets of light-emitting devices with overlapping spectra and different chromaticities, such as two sets of blue-shifted yellow (BSY) LEDs producing outputs with different yellow content. The devices may be selectively controlled, e.g., by using selective current bypass circuits, to provide a desired color temperature or other visual performance in response to a dimming control input such that, for example, a light output approximating that of an incandescent lamp may be achieved.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: January 8, 2019
    Assignee: Cree, Inc.
    Inventor: Antony P. van de Ven
  • Patent number: 9991427
    Abstract: Solid state light emitting devices include a solid state light emitting die and a photonic crystal phosphor light conversion structure. The photonic crystal phosphor light conversion structure may include a solid phosphor layer that includes dielectric nanostructures therein and may be on a light emitting surface of the solid state light emitting die. The photonic crystal phosphor light conversion structure may be attached to the light emitting surface of the solid state light emitting die via an adhesive layer. The photonic crystal phosphor light conversion structure may also be directly on a light emitting surface of the solid state light emitting die. Related methods are also disclosed.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: June 5, 2018
    Assignee: Cree, Inc.
    Inventors: Antony P. van de Ven, Gerald H. Negley
  • Patent number: 9897276
    Abstract: A lighting device comprising a solid-state light source, and a diffuser configured for color mixing of the light from the solid-state light source and spatially separated therefrom, the diffuser comprising at least one phosphor material. Methods of fabricating a lighting device having a reduced total amount of phosphor comprising combining an amount of phosphor with a diffuser structure.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: February 20, 2018
    Assignee: Cree, Inc.
    Inventors: Antony P. Van De Ven, Christopher Hussell, Ronan P. Letoquin, Zongjie Yuan, Tao Tong, Peter Guschl
  • Patent number: 9839083
    Abstract: A dimmable solid state lighting apparatus can include a plurality of light emitting diode (LED) segments including a first LED segment that can have a targeted spectral power distribution for light emitted from the apparatus that is different than spectral power distributions for other LED segments included in the plurality of LED segments. An LED segment selection circuit can be configured to selectively control current through the plurality of LED segments to shift the light emitted by the apparatus to the targeted spectral power distribution responsive to dimming input.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: December 5, 2017
    Assignee: Cree, Inc.
    Inventors: Antony P. van de Ven, Matthew C. Reynolds
  • Patent number: 9713211
    Abstract: A lighting apparatus includes a string with a plurality of serially-connected light emitting device sets, each set comprising at least one light emitting device. The apparatus further includes at least one controllable bypass circuit configured to variably bypass current around at least one light emitting device of a set of the plurality of light emitting device sets responsive to a control input. The control input may include, for example, a temperature input, a string current sense input and/or an adjustment input. The control input may be varied, for example, to adjust a color point of the string.
    Type: Grant
    Filed: September 24, 2009
    Date of Patent: July 18, 2017
    Assignee: Cree, Inc.
    Inventors: Antony P. van de Ven, Gerald H. Negley, Michael James Harris, Paul Kenneth Pickard, Joseph Paul Chobot, Terry Given
  • Patent number: 9642208
    Abstract: A lighting device comprising plural excitation sources configured to provide at least two excitation peak emissions of different wavelength and at least one phosphor material radiationally coupled to the plural light source, the lighting device having a plurality of operational states comprising a first operation state wherein excitation of the at least one phosphor material by a first peak emission from the plural excitation sources provides a first correlated color temperature (CCT) value, and at least one additional operational state wherein excitation of the at least one phosphor material by a second peak emission from the plural excitation sources provides at least one additional CCT value different from the first CCT value. Methods of varying the CCT value using the lighting device with controlled power distribution to the plural excitation sources.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: May 2, 2017
    Assignee: Cree, Inc.
    Inventor: Antony P. Van de Ven
  • Patent number: 9510413
    Abstract: A solid state lighting apparatus can include a substrate having first and second opposing surfaces, where at least one of the opposing surfaces is configured to mount devices thereon. A string of chip-on-board light emitting diode (LED) sets, can be on the first surface of the substrate and coupled in series with one another. An ac voltage source input, from outside the solid state lighting apparatus, can be coupled to the first or second surface of the substrate.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: November 29, 2016
    Assignee: Cree, Inc.
    Inventors: Praneet Jayant Athalye, Liqin Ni, Antony P. van de Ven, Robert D. Underwood
  • Patent number: 9484329
    Abstract: Solid state lighting components are disclosed having multiple discrete light sources whose light combines to provide the desired emission characteristics. One embodiment of an LED component according to the present invention comprises a rectangular submount. A first group of blue shifted yellow (BSY) LED chips, a second group of BSY LED chips and a group of red LED chips are mounted on the submount. A plurality of contacts is arranged along one of the edges of the submount and accessible from one side of the component for applying electrical signals to the groups of LED chips.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: November 1, 2016
    Assignee: CREE, INC.
    Inventors: Antony P. van de Ven, Gerald Negley, Thomas Yuan, Bernd Keller, Theodore Lowes
  • Patent number: 9425172
    Abstract: Lamps, luminaries or solid state lighting components are disclosed having multiple discrete light sources whose light combines to provide the desired emission characteristics. The discrete light sources are arranged in an array pursuant to certain guidelines to promote mixing of light from light sources emitting different colors of light. One embodiment solid state lighting component comprises a light emitting diode (LED) component having an array of LED chips having a first group of LED chips and one or more additional groups of LED chips. The array is arranged so that no two LED chips from said first group are directly next to one another in the array, that less than fifty percent (50%) of the LED chips in the first group of LEDs is on the perimeter of the array, and at least three LED chips from the one or more additional groups is adjacent each of the LED chips in the first group.
    Type: Grant
    Filed: October 24, 2008
    Date of Patent: August 23, 2016
    Assignee: CREE, INC.
    Inventors: Antony P. van de Ven, Gerald Negley
  • Patent number: 9398654
    Abstract: A lighting apparatus includes a first substrate including a switching circuit, the switching circuit including a first port, a second port and a current control circuit configured to generate a current at the second port of the current control circuit responsive to a varying voltage at the first port. The apparatus further includes a second substrate mounted on the first substrate and including at least two LEDs electrically coupled to the second port of the current control circuit of the first substrate.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: July 19, 2016
    Assignee: Cree, Inc.
    Inventors: Antony P. van de Ven, Gerald H. Negley, Terry Given
  • Patent number: 9335006
    Abstract: SSL lamps or luminaires are disclosed that combine blue, yellow (or green) and red photons or emissions to generate light with the desired characteristics. In different embodiments according to the present invention, the blue emission is not provided by an LED chip or package having a blue LED coated with a yellow phosphor, with blue light leaking through the yellow phosphor. Instead, the blue light component can be provided by other types of LED chips in the SSL luminaire such as one having a blue LED covered by a different colored conversion material, with blue light from the blue LED leaking through the different colored conversion material. In one embodiment, the blue component can be provided by an LED chip comprising a blue emitting LED covered by a conversion material that absorbs blue light and re-emits red light, with a portion of the blue light from the LED leaking through the red conversion material.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: May 10, 2016
    Assignee: CREE, INC.
    Inventors: Ronan Le Toquin, Bernd Keller, Tao Tong, Gerald Negley, Antony P. Van De Ven, John Roberts
  • Patent number: 9324924
    Abstract: A solid state lighting comprising: at least one LED element positioned on a top surface of a substrate or a submount; and a polygonal structure comprising a plurality of edges forming a plurality of facets configured to receive light from the at least one LED element, the polygonal structure comprising a wavelength converting material, wherein the wavelength converting material is remotely positioned from the at least one LED element.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: April 26, 2016
    Assignee: Cree, Inc.
    Inventor: Antony P. Van De Ven
  • Patent number: 9220149
    Abstract: Lighting devices include a semiconductor light emitting device and first and second spaced-apart lumiphors. The first lumiphor has a first surface that is positioned to receive radiation emitted by the semiconductor light emitting device and a second surface opposite the first surface. The second lumiphor has a first surface that is positioned to receive radiation emitted by the semiconductor light emitting device and radiation emitted by the luminescent materials in the first lumiphor. The first lumiphor is a leaky lumiphor in that the luminescent materials therein wavelength convert less than 90% of the radiation from the semiconductor light emitting device light that is incident on the first lumiphor.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: December 22, 2015
    Assignee: Cree, Inc.
    Inventors: Paul Pickard, Antony P. Van de Ven, Ronan P. LeToquin
  • Patent number: 9131569
    Abstract: A diode selection circuit for a light emitting apparatus according to some embodiments includes a plurality of light emitting devices coupled in series. The diode selection circuit includes a comparator configured to receive a rectified AC input signal and a reference voltage and to generate a control signal in response to comparison of the rectified AC input signal with the reference voltage, a voltage controlled current source configured to supply a current to the plurality of light emitting diodes that is proportional to the rectified AC input signal, and a switch configured to receive the control signal and to shunt current away from at least one of the plurality of light emitting devices in response to the control signal.
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: September 8, 2015
    Assignee: Cree, Inc.
    Inventors: Antony P. van de Ven, Terry Given
  • Patent number: 9074737
    Abstract: LED lighting systems operate their LED above a junction temperature of 85° C. and space apart from the LED, components of the LED lighting system that reduce an expected lifetime of the LED lighting system to less than 25,000 hours as a result of operating the LED above the junction temperature of 85° C. Accordingly, the LED itself may be driven hotter than is conventionally the case, without impacting its lifetime. By allowing the LED to operate hotter, reduced heat sinking may be needed for the LED itself, which can decrease the cost, size and/or complexity of the thermal management system for the LED lighting system and/or can allow a thermal budget for the LED lighting system to be used elsewhere. Related structures are also described.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: July 7, 2015
    Assignee: Cree, Inc.
    Inventors: Antony P. van de Ven, Gerald H. Negley
  • Patent number: RE45796
    Abstract: A display panel for a flat panel display includes a planar array of LCD devices and a planar array of LED devices that is closely spaced apart from the planar array of LCD devices, at least some of the LED devices being disposed within a periphery of the array of LCD devices such that, in operation, the planar array of LED devices provides backlighting for the planar array of LCD devices. The planar array of LED devices can include at least one solid metal block having first and second opposing metal faces. The first metal face includes therein an array of reflector cavities, and the second metal face includes therein heat sink fins that are exposed at the back face of the flat panel display.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: November 10, 2015
    Assignee: Cree, Inc.
    Inventors: Gerald H. Negley, Antony P. van de Ven, Norbert Hiller