1
Ban P Loh, Nicholas W Medendorp Jr, Peter Andrews, Yankun Fu, Michael Laughner, Ronan Letoquin: Method of uniform phosphor chip coating and LED package fabricated using method. Cree, Koppel Patrick Heybl & Philpott, May 17, 2011: US07943952 (40 worldwide citation)

Methods for fabricating LED packages comprising providing an LED chip and covering at least part of it with a liquid medium. An optical element is provided and placed on the liquid medium. The optical element is allowed to settle to a desired level and the liquid medium is cured. LED packages are al ...


2
Tao Tong, Ronan Letoquin, Bernd Keller, Theodore Lowes, Eric Tarsa, Mark Youmans: LED based pedestal-type lighting structure. Cree, Koppel Patrick Heybl & Philpott, October 22, 2013: US08562161 (23 worldwide citation)

LED based lamps and bulbs are disclosed that comprise a pedestal having a plurality of LEDs, wherein the pedestal at least partially comprises a thermally conductive material. A heat sink structure is included with the pedestal thermally coupled to the heat sink structure. A remote phosphor is arran ...


3
Long Larry Le, Paul Pickard, James Michael Lay, Tao Tong, Ronan Letoquin, Bernd Keller, Eric Tarsa, Mark Youmans, Theodore Lowes, Nicholas W Medendorp Jr, Antony Van De Ven, Gerald Negley: High efficiency solid state lamp and bulb. Cree, Koppel Patrick Heybl & Philpott, June 23, 2015: US09062830 (11 worldwide citation)

Solid state lamps and bulbs comprising different combinations and arrangements of a light source, one or more wavelength conversion materials, regions or layers which are positioned separately or remotely with respect to the light source, and a separate diffuser. These are arranged on a heat sink in ...


4
Zongjie Yuan, Eric Tarsa, Tao Tong, Ronan Letoquin, Bernd Keller, Long Larry Le, James Michael Lay, Randolph Cary Demuynck: LED lamp with remote phosphor and diffuser configuration utilizing red emitters. Cree, Koppel Patrick Heybl & Philpott, May 5, 2015: US09024517 (6 worldwide citation)

Lamps and bulbs are disclosed generally comprising different combinations and arrangement of a light source, one or more wavelength conversion materials, regions or layers which are positioned separately or remotely with respect to the light source, and a separate diffusing layer. This arrangement a ...


5
Tao Tong, Ronan Letoquin, Bernd Keller, Eric Tarsa: LED lamp incorporating remote phosphor and diffuser with heat dissipation features. Cree, Koppel Patrick Heybl & Philpott, January 21, 2014: US08632196 (6 worldwide citation)

An LED lamp or bulb is disclosed that comprises a light source, a heat sink structure and a remote phosphor carrier having at least one conversion material. The phosphor carrier can be remote to the light sources and mounted to the heat sink so that heat from the phosphor carrier spreads into the he ...


6
Tao Tong, Ronan LeToquin, Bernd Keller, James Ibbetson, Gerald Negley: Enhanced color rendering index emitter through phosphor separation. CREE, Koppel Patrick Heybl & Philpott, March 1, 2016: US09275979 (5 worldwide citation)

LED packages, and LED lamps and bulbs, are disclosed that are arranged to minimize the CRI and efficiency losses resulting from the overlap of conversion material emission and excitation spectrum. In different devices having conversion materials with this overlap, the present invention arranges the ...


7
Tao Tong, Ronan Letoquin, Bernd Keller, Eric Tarsa, Mark Youmans, Theodore Lowes, Nicholas W Medendorp Jr, Antony Van De Ven, Gerald Negley, Peter Guschl, Zongjie Yuan: Non-uniform diffuser to scatter light into uniform emission pattern. CREE, Koppel Patrick Heybl & Philpott, April 12, 2016: US09310030 (5 worldwide citation)

A lighting device comprising a light source and a diffuser spaced from the light source. The lighting device further comprises a wavelength conversion material disposed between the light source and the diffuser and spaced from the light source and the diffuser, wherein the diffuser is shaped such th ...


8
James Ibbetson, Bernd Keller, Ronan Letoquin, Matthew Donofrio, Michael Bergmann: White LEDs with emission wavelength correction. Cree, Koppel Patrick Heybl & Philpott, October 15, 2013: US08558252 (2 worldwide citation)

Methods for fabricating semiconductor devices such as LED chips with emission wavelength correction and devices fabricated using these methods. Different embodiments include sequential coating methods that provide two or more coatings or layers of conversion material over LEDs, which can be done at ...


9
Tao Tong, Ronan Letoquin, Bernd Keller, Eric Tarsa: LED lamp incorporating remote phosphor with heat dissipation features. CREE, Koppel Patrick Heybl & Philpott, November 22, 2016: US09500325

An LED lamp or bulb is disclosed that comprises a light source, a heat sink structure and a remote planar phosphor carrier having at least one conversion material. The phosphor carrier can be remote to the light sources and mounted to the heat sink so that heat from the phosphor carrier spreads into ...


10
Tao Tong, Ronan LeToquin, Bernd Keller, Theodore Lowes, Eric Tarsa, Mark Youmans: LED based pedestal-type lighting structure. CREE, Koppel Patrick Heybl & Philpott, December 22, 2015: US09217544

LED based lamps and bulbs are disclosed that comprise a pedestal having a plurality of LEDs, wherein the pedestal at least partially comprises a thermally conductive material. A heat sink structure is included with the pedestal thermally coupled to the heat sink structure. A remote phosphor is arran ...