57 patents
Page 2 of 3
Utility
Color Liquid Crystal Displays and Display Backlights
21 Jul 22
A display includes a display panel and a backlight.
Xianglong Yuan, Gang Wang, Yi-Qun Li
Filed: 3 Feb 22
Utility
High Color Rendering White Light Emitting Devices And High Color Rendering Photoluminescence Compositions
26 May 22
A light emitting device comprises: a solid-state light emitter which generates blue excitation light with a dominant wavelength from 440 nm to 470 nm; a yellow to green photoluminescence material which generates light with a peak emission wavelength from 500 nm to 575 nm; a broadband orange to red photoluminescence material which generates light with a narrowband peak emission wavelength from 580 nm to 620 nm; and a narrowband red manganese-activated fluoride phosphor which generates light with a peak emission wavelength from 625 nm to 635 nm.
Yi-Qun Li, Gang Wang, Haitao Yang, Binghua Chai
Filed: 24 Nov 20
Utility
LED-filaments and LED-filament lamps utilizing manganese-activated fluoride red photoluminescence material
24 May 22
An LED-filament comprising: a partially light-transmissive substrate; a plurality of blue LED chips mounted on a front face of the substrate; first broad-band green to red photoluminescence materials and a first narrow-band manganese-activated fluoride red photoluminescence material covering the plurality of blue LED chips and the front face of the substrate; and second broad-band green to red photoluminescence materials covering the back face of the substrate.
Gang Wang, Jun-Gang Zhao, Yi-Qun Li
Filed: 13 Aug 19
Utility
Color Liquid Crystal Displays and Display Backlights
20 Jan 22
A display backlight, comprises: an excitation source, LED (146), for generating blue excitation light (148) with a peak emission wavelength in a wavelength range 445 nm to 465 nm; and a photoluminescence wavelength conversion layer (152).
Yi-Qun Li, Xianglong Yuan
Filed: 13 Jul 21
Utility
Full Spectrum White Light Emitting Devices
20 Jan 22
A full spectrum white light emitting device comprising: a broadband solid-state excitation source operable to generate broadband blue excitation light; and at least one photoluminescence material which generates green to red light, wherein the device generates white light whose intensity over the blue to cyan region of the spectrum has a maximum percentage deviation from the intensity of light of a black-body or CIE Standard Illuminant D of less than 50%.
Yi-Qun Li, Xianglong Yuan, Jun-Gang Zhao
Filed: 20 Sep 21
Utility
Packaged White Light Emitting Devices Comprising Photoluminescence Layered Structure
30 Dec 21
A light emitting device includes a Chip Scale Packaged (CSP) LED, the CSP LED including an LED chip that generates blue excitation light; and a photoluminescence layer that covers a light emitting face of the LED chip, wherein the photoluminescence layer comprises from 75 wt % to 100 wt % of a manganese-activated fluoride photoluminescence material of the total photoluminescence material content of the layer.
Jun-Gang Zhou, Gang Wang, Yi-Qun Li
Filed: 19 Jul 21
Utility
Full spectrum white light emitting devices
21 Sep 21
A full spectrum white light emitting device includes 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: 16 Jun 20
Utility
Color liquid crystal displays and display backlights
13 Jul 21
A display backlight, comprises: an excitation source, LED (146), for generating blue excitation light (148) with a peak emission wavelength in a wavelength range 445 nm to 465 nm; and a photoluminescence wavelength conversion layer (152).
Yi-Qun Li, Xianglong Yuan
Filed: 19 Apr 18
Utility
High gamut index solid-state white light emitting devices
6 Jul 21
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.
Xianglong Yuan, Yi-Qun Li
Filed: 28 Jan 20
Utility
Narrow-band red phosphors for LED lamps
29 Jun 21
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: 14 Jan 20
Utility
Coated narrow band green phosphor
25 May 21
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, Kuanping Gong, Samuel Lowell Dunscombe
Filed: 10 Mar 20
Utility
Full Spectrum White Light Emitting Devices
6 May 21
A full spectrum light emitting device includes photoluminescence materials which generate light with a peak emission wavelength in a range 490 nm to 680 nm (green to red) and a broadband solid-state excitation source operable to generate broadband blue excitation light with a dominant wavelength in a range from 420 nm to 470 nm, where the broadband blue excitation light includes at least two different blue light emissions in a wavelength range 420 nm to 480 nm.
Xianglong Yuan, Yi-Qun Li
Filed: 25 Jun 19
Utility
Coated narrow band red phosphor
13 Apr 21
A coated phosphor comprises: phosphor particles comprised of a phosphor with composition MSe1−xSx:Eu, wherein M is at least one of Mg, Ca, Sr, Ba and Zn and 0<x<1.0; and a coating on individual ones of the phosphor particles, the coating comprising a layer of oxide material encapsulating the individual phosphor particles; wherein the coated phosphor is configured such that under excitation by a blue LED the reduction in photoluminescent intensity at the peak emission wavelength after 1,000 hours of aging at about 85° C. and about 85% relative humidity is no greater than about 15%; and wherein the coated phosphor is configured such that the change in chromaticity coordinates CIE(x), Δx, after 1,000 hours of aging at about 85° C. and about 85% relative humidity is less than or equal to about 5×10−3.
Yi-Qun Li, Xiongfei Shen, Haoguo Zhu, Kuanping Gong, Samuel Lowell Dunscombe
Filed: 4 Apr 19
Utility
Tunable LED-filaments and tunable LED-filament lamps
16 Mar 21
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: 4 Jun 20
Utility
Full Spectrum White Light Emitting Devices
14 Jan 21
A full spectrum white light emitting device includes 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: 16 Jun 20
Utility
High color rendering white light emitting devices and high color rendering photoluminescence compositions
23 Nov 20
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
Full spectrum white light emitting devices
16 Nov 20
A full spectrum white light emitting device may include a broadband solid-state excitation source for generating broadband excitation light with a dominant wavelength from about 420 nm to about 480 nm and a full width at half maximum intensity greater than about 25 nm; and a narrowband red photoluminescence material with an emission peak wavelength from about 620 nm to about 640 nm and a full width at half maximum emission intensity of less than about 30 nm; where the device has an efficacy of at least 130 lm/W and generates white light with a CRI Ra≥90, and where over a wavelength range from about 430 nm to about 520 nm, a maximum percentage intensity deviation of the white light from the intensity of light of a black-body curve or CIE Standard Illuminant D of the same Correlated Color Temperature is less than about 50%.
Yi-Qun Li, Xianglong Yuan, Jun-Gang Zhao
Filed: 22 Jun 20
Utility
Full Spectrum White Light Emitting Devices
4 Nov 20
A full spectrum white light emitting device may include a broadband solid-state excitation source for generating broadband excitation light with a dominant wavelength from about 420 nm to about 480 nm and a full width at half maximum intensity greater than about 25 nm; and a narrowband red photoluminescence material with an emission peak wavelength from about 620 nm to about 640 nm and a full width at half maximum emission intensity of less than about 30 nm; where the device has an efficacy of at least 130 lm/W and generates white light with a CRI Ra≥90, and where over a wavelength range from about 430 nm to about 520 nm, a maximum percentage intensity deviation of the white light from the intensity of light of a black-body curve or CIE Standard Illuminant D of the same Correlated Color Temperature is less than about 50%.
Yi-Qun Li, Xianglong Yuan, Jun-Gang Zhao
Filed: 22 Jun 20
Utility
LED Filaments and LED Filament Lamps
23 Sep 20
An LED-filament comprising: a partially light-transmissive substrate; a plurality of blue LED chips mounted on a front face of the substrate; first broad-band green to red photoluminescence materials and a first narrow-band manganese-activated fluoride red photoluminescence material covering the plurality of blue LED chips and the front face of the substrate; and second broad-band green to red photoluminescence materials covering the back face of the substrate.
Gang Wang, Jun-Gang Zhao, Yi-Qun Li
Filed: 12 Aug 19
Utility
LED Filaments and LED Filament Lamps
23 Sep 20
An LED-filament includes a partially light-transmissive substrate; blue LED chips mounted on a front face of the substrate; first broad-band green to red photoluminescence materials and a first narrow-band manganese-activated fluoride red photoluminescence material covering the blue LED chips and the front face of the substrate; and second broad-band green to red photoluminescence materials covering the back face of the substrate.
Gang Wang, Jun-Gang Zhao, Yi-Qun Li
Filed: 5 Jan 20