1
Hyunchul Ko, Randall E Johnson, Dung T Duong, Paul N Winberg: System and method for a lens and phosphor layer. Illumitex, Sprinkle IP Law Group, May 28, 2013: US08449128 (30 worldwide citation)

Embodiments disclosed herein provide optical systems utilizing photon conversion materials in conjunction with a light source and an LED. An LED can be positioned in a cavity defined by a base and one or more sidewalls. Phosphors can be disposed on the entrance face of a lens between the entrance fa ...


2
Dung T Duong, Hyunchul Ko, Randall E Johnson, Paul N Winberg, Emil Radkov: System and method for color mixing lens array. Illumitex, Sprinkle IP Law Group, November 19, 2013: US08585253 (29 worldwide citation)

Embodiments described herein provide optical systems that can mix colors to produce illumination patterns having a large area with uniform color. One embodiment of an optical system can include a set of optical units that each produces an illumination pattern with uniform color and intensity. The op ...


3
Dung T Duong, Hyunchul Ko, Randall E Johnson, Paul N Winberg, Emil Radkov: System and method for color mixing lens array. Illumitex, Sprinkle IP Law Group, July 21, 2015: US09086211 (3 worldwide citation)

Embodiments described herein provide optical systems that can mix colors to produce illumination patterns having a large area with uniform color. One embodiment of an optical system can include a set of optical units that each produces an illumination pattern with uniform color and intensity. The op ...


4
Dung T Duong, Hyunchul Ko: Orthogonally separable light bar. Illumitex, Sprinkle Ip Law Group, February 10, 2011: US20110032729-A1

Embodiments described herein provide optical systems in which phosphors are used to down-convert light. In general, optical systems can include a light guide configured to propagate light from an entrance face to a distal end along a propagation axis using total internal reflection. A phosphor layer ...


5
Randall E Johnson, Hyunchul Ko, Dung T Duong, Paul N Winberg: Method for Protecting Optical Devices During Manufacture. Illumitex, September 1, 2011: US20110209825-A1

This disclosure regards methods for protecting a die during shaping and polishing of optical devices. According to various embodiments, layers can be added and removed from a wafer to protect both sides of the wafer during various steps of a manufacturing process.


6
Dung T Duong, Hyunchul Ko: Hybrid lighting panel and lcd system. Illumitex, Sprinkle Ip Law Group, March 18, 2010: US20100066941-A1

A hybrid lighting panel may have a first light guide and a second light guide proximate to the first light guide. The first light guide may receive light from a light source such as an LED array. The first light guide is configured to distribute the light along the length of the first light guide an ...


7
Hyunchul Ko, Randall E Johnson, Dung T Duong, Paul N Winberg: System and method for a phosphor coated lens. Illumitex, Sprinkle IP Law Group, February 24, 2011: US20110044022-A1

Embodiments disclosed herein provide optical systems utilizing photon conversion materials in conjunction with a light source and an LED. An LED can be positioned in a cavity defined by a base and one or more sidewalls. Phosphors can be disposed on the entrance face of a lens between the entrance fa ...


8
Paul N Winberg, Dung T Duong, Matthew R Thomas, Elliot M Pickering, Hyunchul Ko: Optical device polishing. Illumitex, Sprinkle Ip Law Group, November 5, 2009: US20090275266-A1

Embodiments described herein provide methods for manufacturing an optical device having shaped sidewalls. A substrate material can be shaped to form a substrate portion of an optical device comprising an exit face and sidewalls positioned and shaped to reflect light to the exit face to allow light t ...


9
Dung T Duong, Hyunchul Ko, Randall E Johnson, Paul N Winberg, Emil Radkov: System and Method for Color Mixing Lens Array. Illumitex, March 22, 2012: US20120068615-A1

Embodiments described herein provide optical systems that can mix colors to produce illumination patterns having a large area with uniform color. One embodiment of an optical system can include a set of optical units that each produces an illumination pattern with uniform color and intensity. The op ...