Patents by Inventor John X. Zhang
John X. Zhang 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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Patent number: 9551463Abstract: A retrofit LED lighting system with a combination of a directional downlight component and an indirect uplight component is provided. The system comprises light emitting diodes arranged so as to replicate the function of a legacy light source in a transparent or translucent fixture housing. The LED lamp includes upwards facing LEDs emitting light upwards, and a translucent stem covering the uplight LEDs to allow the light from the LEDs to pass through it. Advantageously, the LED lamp with uplight component and a transparent/translucent stem allows the light to be directed upwards and hence, avoids having a sharp cut-off of light appearing in the middle of the reflector fixture and also avoids a lack of uplight shone on the ceiling.Type: GrantFiled: September 21, 2015Date of Patent: January 24, 2017Assignee: LUNERA LIGHTING INC.Inventors: Don Barnetson, Daryl Cheim, John X. Zhang, Ardeshir Esmaeili
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Patent number: 9468046Abstract: A hybrid power architecture for lighting system that physically separates the conversion of AC-DC constant voltage power from the conversion of DC-DC constant current needed to drive the LEDs. The hybrid power architecture comprises a power converter to generate DC volt power, a battery backup unit for providing backup in the event of power failure and control architecture for controlling the intensity of the lighting system.Type: GrantFiled: July 20, 2013Date of Patent: October 11, 2016Assignee: LUNERA LIGHTING, INC.Inventors: Donald Barnetson, John X Zhang
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Publication number: 20160018061Abstract: A retrofit LED lighting system for replacement of existing metal halide lamp driven by magnetic ballast is provided. The retrofit lamp includes a circuit that converts the AC current supplied by magnetic ballast to DC current required for illuminating the LEDs.Type: ApplicationFiled: May 18, 2015Publication date: January 21, 2016Inventors: Donald Barnetson, John X. Zhang, Daryl A. Cheim, Ardeshir Esmaeili
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Publication number: 20160010804Abstract: A retrofit LED lighting system with a combination of a directional downlight component and an indirect uplight component is provided. The system comprises light emitting diodes arranged so as to replicate the function of a legacy light source in a transparent or translucent fixture housing. The LED lamp includes upwards facing LEDs emitting light upwards, and a translucent stem covering the uplight LEDs to allow the light from the LEDs to pass through it. Advantageously, the LED lamp with uplight component and a transparent/translucent stem allows the light to be directed upwards and hence, avoids having a sharp cut-off of light appearing in the middle of the reflector fixture and also avoids a lack of uplight shone on the ceiling.Type: ApplicationFiled: September 21, 2015Publication date: January 14, 2016Applicant: LUNERA LIGHTING INC.Inventors: Don Barnetson, Daryl Cheim, John X. Zhang, Ardeshir Esmaeili
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Patent number: 9033545Abstract: A retrofit LED lighting system for replacement of existing metal halide lamp driven by magnetic ballast is provided. The retrofit lamp includes a circuit that converts the AC current supplied by magnetic ballast to DC current required for illuminating the LEDs.Type: GrantFiled: August 19, 2013Date of Patent: May 19, 2015Assignee: Lunera Lighting Inc.Inventors: Donald Barnetson, John X Zhang, Daryl A Cheim, Ardeshir Esmaeili
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Publication number: 20150049490Abstract: A retrofit LED lighting system for replacement of existing metal halide lamp driven by magnetic ballast is provided. The retrofit lamp includes a circuit that converts the AC current supplied by magnetic ballast to DC current required for illuminating the LEDs.Type: ApplicationFiled: August 19, 2013Publication date: February 19, 2015Inventors: Donald Barnetson, John X. Zhang, Daryl A Cheim, Ardeshir Esmaeili
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Publication number: 20150021988Abstract: A hybrid power architecture for lighting system that physically separates the conversion of AC-DC constant voltage power from the conversion of DC-DC constant current needed to drive the LEDs. The hybrid power architecture comprises a power converter to generate DC volt power, a battery backup unit for providing backup in the event of power failure and control architecture for controlling the intensity of the lighting system.Type: ApplicationFiled: July 20, 2013Publication date: January 22, 2015Inventors: Donald Barnetson, John X. Zhang
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Patent number: 8915611Abstract: A luminaire providing wide angle up lighting using light wells is provided. The luminaire can include a frame having a center plate and side walls. LED modules can be disposed adjacent to opposite side walls such that the LED modules are oriented towards each other. The luminaire can include light wells positioned over each of the LED modules such that light emitted by the LED modules may be reflected within the light wells until it is transmitted by a lens region of the light well at a wide angle relative to the nadir of the luminaire. The light wells can include reflective layers disposed on all surfaces surrounding the LED modules, and a transmittance lens region through which light, emitted by the LED modules as point sources, can exit the fixture as a surface of light. Light emitted by LED modules and light wells disposed on opposite sides of the luminaire can provide a bat wing distribution of up light.Type: GrantFiled: May 27, 2011Date of Patent: December 23, 2014Assignee: Lunera Lighting, Inc.Inventor: John X. Zhang
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Patent number: 8794812Abstract: In one aspect, the present invention provides light emitting devices, including light fixtures and luminaires. In some embodiments, a light emitting device comprises at least one light source, a lightguide operable to receive light from the at least one light source at a first location on the lightguide, at least one light extraction region optically coupled to the lightguide and a substantially non-scattering region along a portion of the lightguide.Type: GrantFiled: May 3, 2010Date of Patent: August 5, 2014Assignees: ABL IP Holding LLC, Fusion Optix, Inc.Inventors: Zane Coleman, John X Zhang, Peter Yi Yan Ngai
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Patent number: 8721152Abstract: In one aspect, the present invention provides light emitting devices, including light fixtures and luminaires. In some embodiments, a light emitting device comprises at least one light source, a lightguide operable to receive light from the at least one light source at a first location on the lightguide, at least one light extraction region optically coupled to the lightguide and a substantially non-scattering region along a portion of the lightguide.Type: GrantFiled: May 3, 2010Date of Patent: May 13, 2014Assignees: ABL IP Holding LLC, Fusion Optix, Inc.Inventors: Zane Coleman, John X Zhang, Peter Yi Yan Ngai, Frank Friedman, James M Young
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Patent number: 8602604Abstract: This is directed to a lens for use with a LED light source. The lens can be placed on a top surface of a light fixture to direct light emitted by a LED module at a wide angle relative to the top surface of the fixture. The lens can include an elongated trench in which several LED light sources can be placed in a line such that light emitted within the trench is re-directed by the lens. The lens can include one or more knobs extending over the trench to facilitate diverting emitted light in a more lateral direction, as opposed to vertical direction. In some cases, the lens can be constructed using an extrusion process by which a lens having a constant cross-section allowing for a wide angle radiation pattern is provided.Type: GrantFiled: October 14, 2010Date of Patent: December 10, 2013Assignee: Lunera Lighting, Inc.Inventors: John X. Zhang, Christopher H. Lowery
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Publication number: 20120257383Abstract: A luminaire providing wide angle up lighting using light wells is provided. The luminaire can include a frame having a center plate and side walls. LED modules can be disposed adjacent to opposite side walls such that the LED modules are oriented towards each other. The luminaire can include light wells positioned over each of the LED modules such that light emitted by the LED modules may be reflected within the light wells until it is transmitted by a lens region of the light well at a wide angle relative to the nadir of the luminaire. The light wells can include reflective layers disposed on all surfaces surrounding the LED modules, and a transmittance lens region through which light, emitted by the LED modules as point sources, can exit the fixture as a surface of light. Light emitted by LED modules and light wells disposed on opposite sides of the luminaire can provide a bat wing distribution of up light.Type: ApplicationFiled: May 27, 2011Publication date: October 11, 2012Applicant: LUNERA LIGHTING INC.Inventor: John X. Zhang
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Publication number: 20120092856Abstract: This is directed to a lens for use with a LED light source. The lens can be placed on a top surface of a light fixture to direct light emitted by a LED module at a wide angle relative to the top surface of the fixture. The lens can include an elongated trench in which several LED light sources can be placed in a line such that light emitted within the trench is re-directed by the lens. The lens can include one or more knobs extending over the trench to facilitate diverting emitted light in a more lateral direction, as opposed to vertical direction. In some cases, the lens can be constructed using an extrusion process by which a lens having a constant cross-section allowing for a wide angle radiation pattern is provided.Type: ApplicationFiled: October 14, 2010Publication date: April 19, 2012Applicant: Lunera Lighting Inc.Inventors: John X. Zhang, Christopher H. Lowery
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Publication number: 20110013420Abstract: In one aspect, the present invention provides light emitting devices, including light fixtures and luminaires. In some embodiments, a light emitting device comprises at least one light source, a lightguide operable to receive light from the at least one light source at a first location on the lightguide, at least one light extraction region optically coupled to the lightguide and a substantially non-scattering region along a portion of the lightguide.Type: ApplicationFiled: May 3, 2010Publication date: January 20, 2011Inventors: Zane Coleman, John X. Zhang, Peter Yi Yan Ngai, Frank Friedman, James M. Young
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Publication number: 20100321953Abstract: In one aspect, the present invention provides light emitting devices, including light fixtures and luminaires. In some embodiments, a light emitting device comprises at least one light source, a lightguide operable to receive light from the at least one light source at a first location on the lightguide, at least one light extraction region optically coupled to the lightguide and a substantially non-scattering region along a portion of the lightguide.Type: ApplicationFiled: May 3, 2010Publication date: December 23, 2010Inventors: Zane Coleman, John X. Zhang, Peter Yi Yan Ngai