Patents by Inventor Jin Hong Lim
Jin Hong Lim 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: 20180128961Abstract: In one aspect, optic assemblies and waveguide fixtures comprising the same are described herein. In an exemplary embodiment, an optic assembly includes an optic housing, an optical insert positioned in the optic housing, and a waveguide optic positioned in the optical insert. The waveguide optic includes a light extraction face and at least two sets of light extraction elements provided on the light extraction face. The at least two sets of light extraction elements are disposed on opposing sides of an axis of symmetry for extracting a symmetric lighting distribution.Type: ApplicationFiled: June 16, 2017Publication date: May 10, 2018Inventors: Jin Hong LIM, Kurt WILCOX, Boris KARPICHEV, Donald WALKER
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Publication number: 20180128960Abstract: In one aspect, lighting devices are described herein. A lighting device comprises an optic housing, a waveguide optic and an optical insert positioned in the housing, the optical insert comprising one or more reflective sidewalls for redirecting light emitted from the waveguide optic. The waveguide optic comprises sidewalls and a light extraction face including extraction elements, wherein the reflective sidewalls of the optical insert cover at least a portion of the sidewalls of the waveguide optic.Type: ApplicationFiled: November 9, 2016Publication date: May 10, 2018Inventors: Jin Hong LIM, Corey Goldstein, Kurt Wilcox, Mark Dixon, Scott Fisher
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Patent number: 9874341Abstract: A sensor module for a lighting fixture includes a module housing configured to be mounted to a lighting fixture, a light sensor mounted in the module housing, and a sensor cover over the light sensor. The sensor cover includes a first surface oriented to face a task surface within an area of interest, and a second surface opposite the first surface. The first surface includes a first Fresnel lens having a number of Fresnel ridges oriented in a first direction. The second surface includes a second Fresnel lens having a number of Fresnel ridges oriented in a second direction, which is different from the first direction. Providing the first Fresnel lens and the second Fresnel lens with differently oriented Fresnel ridges allows the sensor cover to focus light from a relatively large portion of the task surface to the light sensor while remaining small.Type: GrantFiled: June 29, 2015Date of Patent: January 23, 2018Assignee: Cree, Inc.Inventors: Jin Hong Lim, Kurt S. Wilcox, Jason Taylor
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Patent number: 9706619Abstract: A lighting fixture including a light source, a housing, an image sensor, and a lens is disclosed. The housing is coupled to the light source and includes an opening through which light from the light source is emitted to fill an illumination area. The image sensor is configured to capture one or more images of the illumination area. The lens is over the image sensor, and provides the image sensor a field of view that substantially corresponds with the illumination area. By tailoring the lens such that it provides the image sensor a field of view that substantially corresponds with the illumination area, the image sensor can collect information relevant to the lighting fixture.Type: GrantFiled: July 28, 2015Date of Patent: July 11, 2017Assignee: Cree, Inc.Inventors: Jin Hong Lim, John Roberts, Robert D. Underwood, Benjamin A. Jacobson
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Patent number: 9568662Abstract: An optical waveguide body includes first and second pluralities of light extraction features disposed on a first side of the waveguide body and adapted to direct light out of the waveguide body through a second side of the waveguide body opposite the first side. Each of the first plurality of light extraction features has a linear shape and each of the second plurality of light extraction features has at least one of a piecewise linear shape and a nonlinear shape. The piecewise linear shape comprises two adjacent planar surfaces with an angle therebetween of at least about 30 and at most about 180 degrees. The waveguide body further has a light coupling cavity.Type: GrantFiled: March 15, 2014Date of Patent: February 14, 2017Assignee: Cree, Inc.Inventors: Jin Hong Lim, Jason Taylor, Kurt S. Wilcox, Zongjie Yuan, John W. Durkee
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Publication number: 20170031085Abstract: A lighting device comprises a body of optically transmissive material exhibiting a total internal reflection characteristic, the body further comprising a light input surface for receiving light, a light extraction portion spaced from the light input surface, a light transmission portion disposed between the light input surface and the light extraction portion, and at least one light deflection surface for deflecting light toward the light extraction portion. Further in accordance with this aspect the light extraction portion comprises a first extraction surface for extracting light deflected by the at least one light deflection surface out of the body and a second extraction surface for extracting light other than light deflected by the at least one light deflection surface out of the body.Type: ApplicationFiled: June 24, 2016Publication date: February 2, 2017Inventors: Jin Hong Lim, Curt Progl, Kurt Wilcox, Steve Wilcenski, Zongjie Yuan
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Publication number: 20170009957Abstract: A linear LED lighting system, assembly and/or fixture distributes luminance efficiently in certain applications, such as for ceiling lighting used in certain retail environments. According to example embodiments of the invention, a linear LED lighting system includes at least two tilted, parabolic reflecting surfaces and a linear array of LED devices, wherein at least some of the LED devices are substantially disposed at a focus line of at least one of the tilted, parabolic reflecting surfaces. A diffuser or diffusive lens can be disposed adjacent to the parabolic reflecting surfaces where light exits the system to provide color mixing and/or eliminate potential hot spots. The tilt of the reflecting surfaces can be changed to adjust the illumination pattern. A lighting system according to example embodiments of the invention can be designed for retrofit installation or as a complete fixture.Type: ApplicationFiled: July 9, 2015Publication date: January 12, 2017Inventors: Jin Hong Lim, P. Joseph DeSena, JR., Bernd R. Sieberth, Michael Hash, Kurt Wilcox, Johan Samuelsson, Yaote Huang
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Publication number: 20160377275Abstract: A sensor module for a lighting fixture includes a module housing configured to be mounted to a lighting fixture, a light sensor mounted in the module housing, and a sensor cover over the light sensor. The sensor cover includes a first surface oriented to face a task surface within an area of interest, and a second surface opposite the first surface. The first surface includes a first Fresnel lens having a number of Fresnel ridges oriented in a first direction. The second surface includes a second Fresnel lens having a number of Fresnel ridges oriented in a second direction, which is different from the first direction. Providing the first Fresnel lens and the second Fresnel lens with differently oriented Fresnel ridges allows the sensor cover to focus light from a relatively large portion of the task surface to the light sensor while remaining small.Type: ApplicationFiled: June 29, 2015Publication date: December 29, 2016Inventors: Jin Hong Lim, Kurt S. Wilcox, Jason Taylor
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Publication number: 20160369991Abstract: A sensor module for a lighting fixture includes a housing configured to be mounted to a lighting fixture, a light sensor mounted in the housing, and a sensor cover over the light sensor. The sensor cover includes a parallel surface and an angled surface. The parallel surface is parallel to a task surface within an area of interest, and includes a first number of lens sections, each of which are configured to focus light from a different portion of a first subset of the task surface to the light sensor. The angled surface includes a second number of lens sections, each of which extend from an edge of the parallel surface to form a facet of the angled surface and are configured to focus light from a different portion of a second subset of the task surface to the light sensor.Type: ApplicationFiled: June 22, 2015Publication date: December 22, 2016Inventors: Jin Hong Lim, Jason Taylor, Kurt S. Wilcox
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Publication number: 20160298826Abstract: An LED bulb with a down-reflecting optic is disclosed. Embodiments of the present invention can provide for an omnidirectional intensity distribution in the vertical plane for a vertically oriented solid-state lamp. In example embodiments, an optically transmissive enclosure is installed on the driver base. A plurality of LEDs are mounted on a mounting surface of the driver base, and an optical arrangement is disposed at least partially in an optical path from the plurality of LEDs to a central area of the optically transmissive enclosure to down-reflect at least some light from the plurality of LEDs. The optical arrangement can include a TIR optic with a spline-driving surface to down-reflect the at least some light from the plurality of LEDs, or a substantially flat mirror. Either may include a central aperture, and the optical arrangement may include a diffuser or diffusive areas.Type: ApplicationFiled: April 9, 2015Publication date: October 13, 2016Inventors: Jin Hong Lim, Troy Trottier, Kurt Wilcox, John Roberts
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Publication number: 20160242252Abstract: A lighting fixture including a light source, a housing, an image sensor, and a lens is disclosed. The housing is coupled to the light source and includes an opening through which light from the light source is emitted to fill an illumination area. The image sensor is configured to capture one or more images of the illumination area. The lens is over the image sensor, and provides the image sensor a field of view that substantially corresponds with the illumination area. By tailoring the lens such that it provides the image sensor a field of view that substantially corresponds with the illumination area, the image sensor can collect information relevant to the lighting fixture.Type: ApplicationFiled: July 28, 2015Publication date: August 18, 2016Inventors: Jin Hong Lim, John Roberts, Robert D. Underwood, Benjamin A. Jacobson
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Publication number: 20160195252Abstract: A sensor module for a lighting fixture includes a light sensor and a sensor cover over the light sensor. The sensor cover includes a front surface and a light focusing surface opposite the front surface. The front surface is configured to face an area of interest that is generally illuminated by the lighting fixture. The light focusing surface is opposite the front surface and includes a number of lens sections, each of which is configured to focus light from a different portion of the area of interest toward the light sensor. By including a number of lens sections each focusing light from a different portion of the area of interest, a relatively large area of interest can be observed while maintaining desirable aesthetics of the sensor module.Type: ApplicationFiled: January 5, 2015Publication date: July 7, 2016Inventors: Kurt S. Wilcox, Jin Hong Lim, Andrew Bendtsen, Mike Walters
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Publication number: 20160047969Abstract: An optical waveguide body includes first and second pluralities of light extraction features disposed on a first side of the waveguide body and adapted to direct light out of the waveguide body through a second side of the waveguide body opposite the first side. Each of the first plurality of light extraction features has a linear shape and each of the second plurality of light extraction features has at least one of a piecewise linear shape and a nonlinear shape. The piecewise linear shape comprises two adjacent planar surfaces with an angle therebetween of at least about 30 and at most about 180 degrees. The waveguide body further has a light coupling cavity.Type: ApplicationFiled: March 15, 2014Publication date: February 18, 2016Inventors: Jin Hong Lim, Jason Taylor, Kurt S. Wilcox, Zongjie Yuan, John W. Durkee
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Patent number: 8876513Abstract: A continuous-wave (CW) ultraviolet (UV) curing system for solid freeform fabrication (SFF) is provided, wherein the curing system is configured to provide an exposure of UV radiation for one or more layers of UV-curable material. One or more UV exposures may initiate curing of a curable material in the layer dispensed by a solid freeform fabrication apparatus. One approach to provide the single or multiple UV exposures is the use of one or more UV LEDs, which generate UV radiation without generating any substantial amounts of infrared (IR) radiation at the same time. This allows for the curing process to be energy efficient and also allows for the SFF system to be far less complex.Type: GrantFiled: April 25, 2008Date of Patent: November 4, 2014Assignee: 3D Systems, Inc.Inventors: Jin Hong Lim, Hernando Vicente Angulo, John D. Clay, Khalil Moussa
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Publication number: 20090267269Abstract: A continuous-wave (CW) ultraviolet (UV) curing system for solid freeform fabrication (SFF) is provided, wherein the curing system is configured to provide an exposure of UV radiation for one or more layers of UV-curable material. One or more UV exposures may initiate curing of a curable material in the layer dispensed by a solid freeform fabrication apparatus. One approach to provide the single or multiple UV exposures is the use of one or more UV LEDs, which generate UV radiation without generating any substantial amounts of infrared (IR) radiation at the same time. This allows for the curing process to be energy efficient and also allows for the SFF system to be far less complex.Type: ApplicationFiled: April 25, 2008Publication date: October 29, 2009Inventors: Jin Hong Lim, Hernando Vincente Angulo, John D. Clay, Khalil Moussa
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Patent number: 6552844Abstract: An optical amplifier and communications system for amplifying an input signal and providing an output signal includes a nonlinear light absorber for passively controlling the level of the output signal. The nonlinear light absorber provides an approximately constant output signal level independent of the level of the input signal.Type: GrantFiled: June 1, 2001Date of Patent: April 22, 2003Assignee: Agere Systems Guardian Corp.Inventor: Jin Hong Lim
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Publication number: 20020181080Abstract: An optical amplifier and communications system for amplifying an input signal and providing an output signal includes a nonlinear light absorber for passively controlling the level of the output signal. The nonlinear light absorber provides an approximately constant output signal level independent of the level of the input signal.Type: ApplicationFiled: June 1, 2001Publication date: December 5, 2002Inventor: Jin Hong Lim