Patents by Inventor Chunxia FENG

Chunxia FENG 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: 11242977
    Abstract: Optical lens and light emitting device designs achieve uniform light distribution without producing a light “hot spot”, with a benefit of reducing the number of light sources needed and overall cost for direct-lit backlight device. The optical lens includes coating portions or structures on the bottom surface thereof, and a backlight device, or other light emitting device, incorporating said lens, to produce a uniform distribution of light at a target surface. The disclosed lens and light emitting device are particularly useful when an extremely wide transfer function of backlight is needed.
    Type: Grant
    Filed: January 22, 2020
    Date of Patent: February 8, 2022
    Assignee: Lumileds LLC
    Inventor: Chunxia Feng
  • Patent number: 11199755
    Abstract: A device includes a light-emitting device (LED) having at least two vertical light-emitting sides, and a ring-shaped light guide having a bottom side, a top side comprising a light-emitting surface, an inner sidewall, and an outer sidewall defining an indentation having at least two vertical in-coupling surfaces mated to the at least two vertical light-emitting sides of the LED.
    Type: Grant
    Filed: May 5, 2020
    Date of Patent: December 14, 2021
    Assignee: Lumileds LLC
    Inventors: Varun Dev Kakkar, Arjen Van Der Sijde, Erno Fancsali, Chunxia Feng, Nicola Bettina Pfeffer
  • Patent number: 11137665
    Abstract: A device includes a light-emitting device (LED) having at least two vertical light-emitting sides, and a ring-shaped light guide having a bottom side, a top side comprising a light-emitting surface, an inner sidewall, and an outer sidewall defining an indentation having at least two vertical in-coupling surfaces mated to the at least two vertical light-emitting sides of the LED.
    Type: Grant
    Filed: January 16, 2017
    Date of Patent: October 5, 2021
    Assignee: Lumileds LLC
    Inventors: Varun Dev Kakkar, Arjen Van Der Sijde, Erno Fancsali, Chunxia Feng, Nicola Pfeffer
  • Patent number: 11003051
    Abstract: A device includes a light-emitting device (LED) having at least two vertical light-emitting sides, and a ring-shaped light guide having a bottom side, a top side comprising a light-emitting surface, an inner sidewall, and an outer sidewall defining an indentation having at least two vertical in-coupling surfaces mated to the at least two vertical light-emitting sides of the LED.
    Type: Grant
    Filed: January 16, 2017
    Date of Patent: May 11, 2021
    Assignee: Lumileds Holding B.V.
    Inventors: Varun Dev Kakkar, Arjen Van Der Sijde, Erno Fancsali, Chunxia Feng, Nicola Pfeffer
  • Patent number: 10948804
    Abstract: A device includes a light-emitting device (LED) having at least two vertical light-emitting sides, and a ring-shaped light guide having a bottom side, a top side comprising a light-emitting surface, an inner sidewall, and an outer sidewall defining an indentation having at least two vertical in-coupling surfaces mated to the at least two vertical light-emitting sides of the LED.
    Type: Grant
    Filed: May 5, 2020
    Date of Patent: March 16, 2021
    Assignee: Lumileds LLC
    Inventors: Varun Dev Kakkar, Arjen Van Der Sijde, Erno Fancsali, Chunxia Feng, Nicola Bettina Pfeffer
  • Patent number: 10930828
    Abstract: A light source includes a light-emitting diode or device (LED) and an optic mounted over the LED. The LED emits a first radiation pattern that is non-rotationally symmetric about a first axis. The optic collects the first radiation pattern and projects a second radiation pattern that is rotational symmetric about a second axis and has a peak intensity that is angled from the second axis.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: February 23, 2021
    Assignee: Lumileds LLC
    Inventors: Varun Dev Kakkar, Emanuel Nicolaas Hermanus Johannes Stassar, Erno Fancsali, Chunxia Feng, Rob Jacques Paul Engelen
  • Patent number: 10845028
    Abstract: Disclosed lens designs enable uniform light distribution without hot spot, achieving wider transfer functions of light compared with traditional lenses, with a benefit of reducing the number of light sources needed and overall cost for direct-lit backlight device. A disclosed lens includes a beam shaping element on the top thereof and a backlight device incorporating the lens and the beam shaping element to eliminate a light hot spot produced by the backlight device and obtain a uniform light distribution at the illumination field. The disclosed lens is especially useful when extremely wider transfer function or extremely thin backlight is needed.
    Type: Grant
    Filed: January 22, 2020
    Date of Patent: November 24, 2020
    Assignee: Lumileds LLC
    Inventor: Chunxia Feng
  • Publication number: 20200264494
    Abstract: A device includes a light-emitting device (LED) having at least two vertical light-emitting sides, and a ring-shaped light guide having a bottom side, a top side comprising a light-emitting surface, an inner sidewall, and an outer sidewall defining an indentation having at least two vertical in-coupling surfaces mated to the at least two vertical light-emitting sides of the LED.
    Type: Application
    Filed: May 5, 2020
    Publication date: August 20, 2020
    Inventors: Varun Dev Kakkar, Arjen Van Der Sijde, Erno Fancsali, Chunxia Feng, Nicola Bettina Pfeffer
  • Publication number: 20200158313
    Abstract: Optical lens and light emitting device designs achieve uniform light distribution without producing a light “hot spot”, with a benefit of reducing the number of light sources needed and overall cost for direct-lit backlight device. The optical lens includes coating portions or structures on the bottom surface thereof, and a backlight device, or other light emitting device, incorporating said lens, to produce a uniform distribution of light at a target surface. The disclosed lens and light emitting device are particularly useful when an extremely wide transfer function of backlight is needed.
    Type: Application
    Filed: January 22, 2020
    Publication date: May 21, 2020
    Inventor: Chunxia Feng
  • Publication number: 20200158311
    Abstract: Disclosed lens designs enable uniform light distribution without hot spot, achieving wider transfer functions of light compared with traditional lenses, with a benefit of reducing the number of light sources needed and overall cost for direct-lit backlight device. A disclosed lens includes a beam shaping element on the top thereof and a backlight device incorporating the lens and the beam shaping element to eliminate a light hot spot produced by the backlight device and obtain a uniform light distribution at the illumination field. The disclosed lens is especially useful when extremely wider transfer function or extremely thin backlight is needed.
    Type: Application
    Filed: January 22, 2020
    Publication date: May 21, 2020
    Inventor: Chunxia Feng
  • Patent number: 10584847
    Abstract: Disclosed lens designs enable uniform light distribution without hot spot, achieving wider transfer functions of light compared with traditional lenses, with a benefit of reducing the number of light sources needed and overall cost for direct-lit backlight device. A disclosed lens includes a beam shaping element on the top thereof and a backlight device incorporating the lens and the beam shaping element to eliminate a light hot spot produced by the backlight device and obtain a uniform light distribution at the illumination field. The disclosed lens is especially useful when extremely wider transfer function or extremely thin backlight is needed.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: March 10, 2020
    Assignee: Lumileds Holding B.V.
    Inventor: Chunxia Feng
  • Patent number: 10578278
    Abstract: Optical lens and light emitting device designs achieve uniform light distribution without producing a light “hot spot”, with a benefit of reducing the number of light sources needed and overall cost for direct-lit backlight device. The optical lens includes coating portions or structures on the bottom surface thereof, and a backlight device, or other light emitting device, incorporating said lens, to produce a uniform distribution of light at a target surface. The disclosed lens and light emitting device are particularly useful when an extremely wide transfer function of backlight is needed.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: March 3, 2020
    Assignee: Lumileds Holding B.V.
    Inventor: Chunxia Feng
  • Publication number: 20190353326
    Abstract: Disclosed lens designs enable uniform light distribution without hot spot, achieving wider transfer functions of light compared with traditional lenses, with a benefit of reducing the number of light sources needed and overall cost for direct-lit backlight device. A disclosed lens includes a beam shaping element on the top thereof and a backlight device incorporating the lens and the beam shaping element to eliminate a light hot spot produced by the backlight device and obtain a uniform light distribution at the illumination field. The disclosed lens is especially useful when extremely wider transfer function or extremely thin backlight is needed.
    Type: Application
    Filed: July 31, 2019
    Publication date: November 21, 2019
    Inventor: Chunxia Feng
  • Publication number: 20190348583
    Abstract: A light source includes a light-emitting diode or device (LED) and an optic mounted over the LED. The LED emits a first radiation pattern that is non-rotationally symmetric about a first axis. The optic collects the first radiation pattern and projects a second radiation pattern that is rotational symmetric about a second axis and has a peak intensity that is angled from the second axis.
    Type: Application
    Filed: September 15, 2017
    Publication date: November 14, 2019
    Applicant: Lumileds LLC
    Inventors: Varun Dev KAKKAR, Emanuel Nicolaas Hermanus Johannes STASSAR, Erno FANCSALI, Chunxia FENG, Rob Jacques Paul ENGELEN
  • Patent number: 10400986
    Abstract: Disclosed lens designs enable uniform light distribution without hot spot, achieving wider transfer functions of light compared with traditional lenses, with a benefit of reducing the number of light sources needed and overall cost for direct-lit backlight device. A disclosed lens includes a beam shaping element on the top thereof and a backlight device incorporating the lens and the beam shaping element to eliminate a light hot spot produced by the backlight device and obtain a uniform light distribution at the illumination field. The disclosed lens is especially useful when extremely wider transfer function or extremely thin backlight is needed.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: September 3, 2019
    Assignee: Lumileds Holding B.V.
    Inventor: Chunxia Feng
  • Publication number: 20190199900
    Abstract: A system is provided for testing a flash emitter is disclosed. The system may include a mounting panel comprising a plurality of mount points at a center point and at positions that correspond to vertices of at least two different field-of-view configurations. The system may include a device holder separated from the mounting panel by a predetermined distance of a platform. The system may include an adjustment rack coupled to the device holder and the platform, the adjustment rack configured to change a position of the device holder relative to the center point of the mounting panel such that the flash emitter of a device in the device holder is aligned the center point of the mounting panel.
    Type: Application
    Filed: December 19, 2018
    Publication date: June 27, 2019
    Applicant: Lumileds Holding B.V.
    Inventors: Chunxia FENG, Nicola Bettina PFEFFER, Yu LI
  • Publication number: 20190041029
    Abstract: Disclosed lens designs enable uniform light distribution without hot spot, achieving wider transfer functions of light compared with traditional lenses, with a benefit of reducing the number of light sources needed and overall cost for direct-lit backlight device. A disclosed lens includes a beam shaping element on the top thereof and a backlight device incorporating the lens and the beam shaping element to eliminate a light hot spot produced by the backlight device and obtain a uniform light distribution at the illumination field. The disclosed lens is especially useful when extremely wider transfer function or extremely thin backlight is needed.
    Type: Application
    Filed: April 24, 2018
    Publication date: February 7, 2019
    Applicant: Lumileds Holding B.V.
    Inventor: Chunxia FENG
  • Publication number: 20190033688
    Abstract: A device includes a light-emitting device (LED) having at least two vertical light-emitting sides, and a ring-shaped light guide having a bottom side, a top side comprising a light-emitting surface, an inner sidewall, and an outer sidewall defining an indentation having at least two vertical in-coupling surfaces mated to the at least two vertical light-emitting sides of the LED.
    Type: Application
    Filed: January 16, 2017
    Publication date: January 31, 2019
    Applicant: Lumileds Holding B.V.
    Inventors: Varun Dev KAKKAR, Arjen VAN DER SIJDE, Erno FANCSALI, Chunxia FENG, Nicola PFEFFER
  • Publication number: 20180347786
    Abstract: Optical lens and light emitting device designs achieve uniform light distribution without producing a light “hot spot”, with a benefit of reducing the number of light sources needed and overall cost for direct-lit backlight device. The optical lens includes coating portions or structures on the bottom surface thereof, and a backlight device, or other light emitting device, incorporating said lens, to produce a uniform distribution of light at a target surface. The disclosed lens and light emitting device are particularly useful when an extremely wide transfer function of backlight is needed.
    Type: Application
    Filed: May 30, 2018
    Publication date: December 6, 2018
    Applicant: Lumileds Holding B.V.
    Inventor: Chunxia FENG