57 patents
Page 3 of 3
Utility
Tunable LED-Filaments and Tunable LED-Filament Lamps
23 Sep 20
An LED-filament includes a light-transmissive substrate; a first array of LED chips on a front face of the substrate; a second array of LED chips on the front face of the substrate; a first photoluminescence arrangement covering the first array of LED chips; and a second photoluminescence arrangement covering the second array of LED chips; where the first array of LED chips and the first arrangement generate light of a first color temperature and the second array of LED chips and the second arrangement generate light of a second color temperature.
Yi-Qun Li, Gang Wang, Jun-Gang Zhao
Filed: 3 Jun 20
Utility
Narrow-Band Red Photoluminescence Materials for Solid-State Light Emitting Devices and Filaments
26 Aug 20
Light emitting devices and LED-filaments comprise an excitation source (e.g.
Yi-Qun Li
Filed: 21 Jun 18
Utility
Color Liquid Crystal Displays and Display Backlights
19 Aug 20
There is provided a display backlight (604), including an excitation source (644) for generating blue light (650); and a wavelength converter (654) being a unitary construction including a combination of a wavelength selective filter layer (658) bonded to a photoluminescence layer (660), where the photoluminescence layer (658) includes a green photoluminescence material and a red photoluminescence material; and where the wavelength selective filter layer (658) is transmissive to blue light and reflective to green and red light.
Xianglong Yuan, Yi-Qun Li
Filed: 13 Feb 20
Utility
High Gamut Index Solid-State White Light Emitting Devices
29 Jul 20
A white light emitting device includes a solid-state excitation source operable to generate excitation light having a dominant wavelength ranging from 440 nm to 455 nm; a first photoluminescence material which generates light having a peak emission wavelength ranging from 500 nm to 530 nm; and a second photoluminescence material which generates light having a peak emission wavelength ranging from 640 nm to 690 nm, where the device is operable to generate white light with an IEC TM-30 Gamut Index Rg ranging from 105 to 115. vThe device can be operable to generate white light having an IEC TM-30 Fidelity Index Rf which ranges from 85 to 95 and a sum of Gamut Index Rg and fidelity index Rf is greater than or equal to 195 and less than or equal to 200.
Xianglong Yuan, Yi-Qun Li
Filed: 27 Jan 20
Utility
Coated Narrow Band Green Phosphor
1 Jul 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: 9 Mar 20
Utility
Full spectrum white light emitting devices
15 Jun 20
A full spectrum white light emitting device comprises: photoluminescence materials which generate light with a peak emission wavelength in a range from about 490 nm to about 680 nm; and a broadband solid-state excitation source operable to generate broadband excitation light with a dominant wavelength in a range from about 420 nm to about 480 nm.
Yi-Qun Li, Xianglong Yuan, Jun-Gang Zhao
Filed: 18 Jul 19
Utility
Narrow-Band Red Phosphors for LED Lamps
3 Jun 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: 13 Jan 20
Utility
Wirelessly Controllable Lighting Modules
6 May 20
A lighting module may include a two color/color temperature LED array including first LEDs that generate light of a first color/color temperature; second LEDs that generate light of a second color/color temperature; a first LED driver for operating the first LEDs in response to a first control signal; a second LED driver for operating the second LEDs in response to a second control signal; a wireless controller for generating the first and second control signals in response to a control signal wirelessly receivable from a remote device; and a circuit board.
Yi-Qun Li
Filed: 3 Nov 19
Utility
Solid-state light emitting devices and signage with photoluminescence wavelength conversion and photoluminescent compositions therefor
23 Mar 20
A photoluminescent composition (“phosphor ink”) comprises a suspension of particles of at least one blue light (380 nm to 480 nm) excitable phosphor material in a light transmissive liquid binder in which the weight loading of at least one phosphor material to binder material is in a range 40% to 75%.
Xianglong Yuan, Bing Dai, Jonathan Melman, Charles Edwards
Filed: 2 Aug 17
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
High Color Rendering White Light Emitting Devices And High Color Rendering Photoluminescence Compositions
4 Dec 19
A exemplary light emitting device includes an excitation source operable to generate excitation light with a dominant wavelength in a range 450 nm to 470 nm; a red photoluminescence material which generates light with a peak emission wavelength in a range 600 nm to 620 nm with a full width at half maximum emission intensity greater than 70 nm and less than 80 nm; a yellow to green photoluminescence material which generates light with a peak emission wavelength in a range 530 nm to 550 nm; and a narrow-band red photoluminescence material which generates light with a peak emission wavelength in a range 625 nm to 635 nm with a full width at half maximum emission intensity greater than about 5 nm and less than about 25 nm.
Gang Wang, Yi-Qun Li
Filed: 5 May 19
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