27 patents
Page 2 of 2
Utility
Coated narrow band green phosphor
9 Mar 20
A coated phosphor may comprise: phosphor particles comprised of a phosphor with composition (M)(A)2S4: Eu, wherein: M is at least one of Mg, Ca, Sr and Ba; and A is at least one of Ga, Al, In, Y; a dense impermeable (pinhole-free) coating of an oxide material encapsulating individual ones of the phosphor particles.
Haoguo Zhu, Yi-Qun Li
Filed: 19 Oct 17
Utility
Dimmable solid-state light emitting devices
17 Feb 20
A white light emitting device or LED-filament comprises: a solid-state light emitter (LED) operable to generate excitation light; a first phosphor associated with the solid-state light emitter to generate light with a peak emission wavelength in a range 500 nm to 575 nm; and a second phosphor associated with the solid-state light emitter to generate light with a peak emission wavelength in a range 600 nm to 650 nm, wherein a percentage decrease in conversion efficiency corresponding to an increase in excitation light photon density exhibited by the second phosphor is larger than a percentage decrease in conversion efficiency corresponding to the same increase in excitation light photon density exhibited by the first phosphor.
Yi-Qun Li, Xiongfei Shen, Gang Wang
Filed: 16 Dec 18
Utility
Solid-state lamps utilizing photoluminescence wavelength conversion components
10 Feb 20
Disclosed are improved photoluminescence wavelength conversion components and lamps that incorporate such components.
Yi-Qun Li
Filed: 15 Nov 17
Utility
Narrow-band red phosphors for LED lamps
13 Jan 20
A light emitting device (LED-Filament) comprises: a light-transmissive substrate; at least one blue LED chip mounted on the light-transmissive substrate, for instance mounted on a face thereof; and a photoluminescence material at least partially covering the at least one blue LED chip.
Yi-Qun Li, Gang Wang
Filed: 11 Jan 18
Utility
LED-based linear lamps and lighting arrangements
25 Nov 19
There is provided an elongated optical component having a direction of elongation, comprising: a light transmissive core and a wavelength converting portion disposed on an exterior surface of the light transmissive core, wherein the wavelength converting portion comprises a photoluminescence material, and wherein the wavelength converting portion has a cross-section comprising an apex.
Scott West
Filed: 19 Apr 18
Utility
Narrow band red phosphor
18 Nov 19
A narrow band red phosphor may have a general composition MSxSeyAz:Eu, wherein M is at least one of Mg, Ca, Sr and Ba, A is at least one of C, N, B, P and a monovalent combining group NCN (cyanamide), and may in some embodiments further include one or more of O, F, Cl, Br and I.
Haoguo Zhu, Yi-Qun Li
Filed: 29 Sep 16
Utility
Packaged white light emitting device comprising photoluminescence layered structure
4 Nov 19
A white light emitting package (20) comprises: a solid-state excitation source (LED 30) for generating excitation light with a dominant wavelength in a range 440 nm to 470 nm; and a layered photoluminescence structure.
Jun-Gang Zhao, Gang Wang, Yi-Qun Li
Filed: 1 Apr 19