Patents by Inventor Paul Kenneth Pickard

Paul Kenneth Pickard 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: 10470269
    Abstract: Systems and methods for generating tunable white light include a plurality of Light Emitting Diode (LED) strings that generate light having color points falling within red, blue, and green color ranges. The systems and methods further utilize recipient luminophoric mediums to alter light provided by LEDs. Each LED can be driven with a separately controllable current in order to tune the generated light output.
    Type: Grant
    Filed: July 30, 2018
    Date of Patent: November 5, 2019
    Assignee: EcoSense Lighting, Inc.
    Inventors: Raghuram L. V Petluri, Paul Kenneth Pickard
  • Patent number: 10465862
    Abstract: Systems and methods to provide multiple channels of light to form a blended white light output, the systems and methods utilizing recipient luminophoric mediums to alter light provided by light emitting diodes. The predetermined blends of luminescent materials within the luminophoric mediums provide predetermined spectral power distributions in the white light output.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: November 5, 2019
    Assignee: ECOSENSE LIGHTING INC.
    Inventors: Raghuram L. V. Petluri, Paul Kenneth Pickard
  • Publication number: 20190285231
    Abstract: An optical cup which mixes multiple channels of light to form a blended output, the device having discreet zones or channels including a plurality of reflective cavities each having a remote phosphor light converting appliance covering a cluster of LEDs providing a channel of light which is reflected upward. The predetermined blends of phosphors provide a predetermined range of illumination wavelengths in the output.
    Type: Application
    Filed: June 6, 2019
    Publication date: September 19, 2019
    Applicant: ECOSENSE LIGHTING INC
    Inventors: Raghuram L. V. PETLURI, Paul Kenneth PICKARD, Robert FLETCHER
  • Patent number: 10415768
    Abstract: An optical cup which mixes multiple channels of light to form a blended output, the device having discreet zones or channels including a plurality of reflective cavities each having a remote phosphor light converting appliance covering a cluster of LEDs providing a channel of light which is reflected upward. The predetermined blends of phosphors provide a predetermined range of illumination wavelengths in the output.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: September 17, 2019
    Assignee: ECOSENSE LIGHTING INC.
    Inventors: Raghuram L. V. Petluri, Paul Kenneth Pickard, Robert Fletcher
  • Publication number: 20190254142
    Abstract: Display systems for displaying digital content. The display systems have one or more LED-based lighting channels adapted to generate a circadian-inducing blue light output in first operational mode and a less-circadian-inducing blue light output in a second operational mode. The circadian-inducing blue light can have a first circadian-stimulating energy characteristic related to the associated first spectral power distributions of light generated in the first operational mode, and the non-circadian-inducing blue light can have a second circadian-stimulating energy characteristic related to the associated second spectral power distribution of light generated in the second operational mode. Disclosure methods of generating digital display content with the display systems described herein. The methods can generate a circadian-inducing blue light output in first operational mode and a less-circadian-inducing blue light output in a second operational mode.
    Type: Application
    Filed: April 24, 2019
    Publication date: August 15, 2019
    Applicant: EcoSense Lighting, Inc.
    Inventors: Raghuram L.V Petluri, Paul Kenneth Pickard
  • Patent number: 10352547
    Abstract: In some embodiments, a lighting device comprising two or more light sources and an optical device configured to enhance uniformity of light emitted from the light sources and emerging from a surface of the optical device, an average distance between light sources less than one half of the square root of the area of the surface divided by the number of light sources. In some embodiments, a fixture structure comprising a reflective structure and a heat conductor in contact with the reflective structure and covering not more than 30 percent of the surface area of the reflective structure. In some embodiments, a lighting device comprising a fixture structure, at least one light source mounted on one substrate, and at least one light source mounted on another substrate. Other fixture structures and lighting devices.
    Type: Grant
    Filed: February 14, 2011
    Date of Patent: July 16, 2019
    Assignee: IDEAL Industries Lighting LLC
    Inventors: Paul Kenneth Pickard, Gerald H. Negley, Antony Paul Van De Ven, Nicholas W. Medendorp, Jr.
  • Publication number: 20190203889
    Abstract: An optical cup which mixes multiple channels of light to form a blended output, the device having discreet zones or channels including a plurality of reflective cavities each having a remote light converting appliance covering a cluster of LEDs providing a channel of light which is reflected upward. The predetermined blends of luminescence materials provide a predetermined range of illumination wavelengths in the output. The remote light converting appliances may be provided as frustoconical elements directly adjacent to the LEDs within frustoconical reflective cavities. An index matching compound can be disposed between the light converting appliances and the associated LEDs.
    Type: Application
    Filed: July 30, 2018
    Publication date: July 4, 2019
    Applicant: EcoSense Lighting, Inc.
    Inventors: Raghuram L.V Petluri, Paul Kenneth Pickard, Robert Fletcher
  • Publication number: 20190174587
    Abstract: The present disclosure provides methods for generating tunable white light with controllable circadian energy performance. The methods use a plurality of LED strings to generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output. Different light emitting modes can be selected that utilize different combinations of the plurality of LED strings in order to tune the generated white light. One or more of the LED strings can have ultraviolet or violet LEDs.
    Type: Application
    Filed: July 30, 2018
    Publication date: June 6, 2019
    Applicant: EcoSense Lighting, Inc.
    Inventors: Raghuram L.V. Petluri, Paul Kenneth Pickard
  • Publication number: 20190154212
    Abstract: An optical cup which mixes multiple channels of light to form a blended output, the device having discreet zones or channels including a plurality of reflective cavities each having a remote phosphor light converting appliance covering a cluster of LEDs providing a channel of light which is reflected upward. The predetermined blends of phosphors provide a predetermined range of illumination wavelengths in the output.
    Type: Application
    Filed: July 28, 2018
    Publication date: May 23, 2019
    Applicant: EcoSense Lighting, Inc.
    Inventors: Raghuram L.V Petluri, Paul Kenneth Pickard, Robert Fletcher
  • Publication number: 20190137053
    Abstract: An optical cup which mixes multiple channels of light to form a blended output, the device having discreet zones or channels including a plurality of reflective cavities each having a remote light converting appliance covering a cluster of LEDs providing a channel of light which is reflected upward. The predetermined blends of luminescence materials provide a predetermined range of illumination wavelengths in the output. The remote light converting appliances may be provided as frustoconical elements within frustoconical reflective cavities with a void between the light converting appliances and the associated LEDs.
    Type: Application
    Filed: January 7, 2019
    Publication date: May 9, 2019
    Applicant: ECOSENSE LIGHTING INC.
    Inventors: Raghuram L. V. PETLURI, Paul Kenneth PICKARD, Robert FLETCHER
  • 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
  • Publication number: 20190098720
    Abstract: The present disclosure provides methods for generating tunable white light. The methods include using a plurality of LED strings to generate light with color points that fall within white, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.
    Type: Application
    Filed: July 30, 2018
    Publication date: March 28, 2019
    Applicant: EcoSense Lighting, Inc.
    Inventors: Raghuram L.V Petluri, Paul Kenneth Pickard
  • Publication number: 20190069355
    Abstract: The present disclosure provides methods for generating tunable white light with controllable circadian energy performance. The methods use a plurality of LED strings to generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output. Different light emitting modes can be selected that utilize different combinations of the plurality of LED strings in order to tune the generated white light.
    Type: Application
    Filed: July 30, 2018
    Publication date: February 28, 2019
    Applicant: EcoSense Lighting, Inc.
    Inventors: Raghuram L.V Petluri, Paul Kenneth Pickard
  • Publication number: 20190059138
    Abstract: The present disclosure provides systems for generating tunable white light. The systems include a plurality of LED strings that generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.
    Type: Application
    Filed: July 30, 2018
    Publication date: February 21, 2019
    Applicant: EcoSense Lighting, Inc.
    Inventors: Raghuram L.V. Petluri, Paul Kenneth Pickard
  • Patent number: 10203088
    Abstract: A direct and back view LED lighting system is disclosed. Embodiments of a lighting system and example light fixture are described. LED devices provide the light source. The LED devices can be positioned with a heatsink at or near the top of the system proximate to a back reflector. In example embodiments, the LED devices emit light downward. The system can be used in a troffer style fixture with a support structure and a pan. The system or fixture can have a lens arrangement including lenses, lens plates or sections with differing optical characteristics, including a partially reflective lens plate or section that passes and diffuses some light from the LED light source, but reflects some light back to the back reflector. Additional lenses or lens plates serve as diffusers.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: February 12, 2019
    Assignee: Cree, Inc.
    Inventors: James Michael Lay, Paul Kenneth Pickard
  • Patent number: 10197226
    Abstract: An optical cup which mixes multiple channels of light to form a blended output, the device having discreet zones or channels including a plurality of reflective cavities each having a remote light converting appliance covering a cluster of LEDs providing a channel of light which is reflected upward. The predetermined blends of luminescence materials provide a predetermined range of illumination wavelengths in the output. The remote light converting appliances may be provided as frustoconical elements within frustoconical reflective cavities with a void between the light converting appliances and the associated LEDs.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: February 5, 2019
    Assignee: ECOSENSE LIGHTING INC
    Inventors: Raghuram L. V. Petluri, Paul Kenneth Pickard, Robert Fletcher
  • Patent number: 10197240
    Abstract: A lighting device comprising at least one solid state light emitting light source, a power supply and a housing. The light source(s), and optionally also the power supply, is/are positioned within the housing. The power supply is configured to supply power to the light source(s). The housing comprises at least one substantially transparent light passing structure which comprises at least one thermoplastic material. When power is supplied to the light source, at least a portion of the light emitted by the source light passes through the light passing structure.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: February 5, 2019
    Assignee: Cree, Inc.
    Inventor: Paul Kenneth Pickard
  • Publication number: 20190029092
    Abstract: The present disclosure provides methods for generating tunable white light. The methods include using a plurality of LED strings to generate light with color points that fall within white, red, and yellow/green color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.
    Type: Application
    Filed: July 30, 2018
    Publication date: January 24, 2019
    Applicant: EcoSense Lighting, Inc.
    Inventors: Raghuram L.V Petluri, Paul Kenneth Pickard
  • Publication number: 20190024853
    Abstract: The present disclosure provides methods for generating white light. The methods use a plurality of LED strings to generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.
    Type: Application
    Filed: July 30, 2018
    Publication date: January 24, 2019
    Applicant: EcoSense Lighting, Inc.
    Inventors: Raghuram L.V. Petluri, Paul Kenneth Pickard
  • Publication number: 20180368219
    Abstract: The present disclosure provides systems for generating tunable white light. The systems include a plurality of LED strings that generate light with color points that fall within red, blue, and green color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.
    Type: Application
    Filed: July 30, 2018
    Publication date: December 20, 2018
    Applicant: EcoSense Lighting, Inc.
    Inventors: Raghuram L.V Petluri, Paul Kenneth Pickard