57 patents
Utility
Packaged White Light Emitting Device Comprising Photoluminescence Layered Structure
30 Nov 23
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: 18 Apr 23
Utility
Color Liquid Crystal Displays and Display Backlights
9 Nov 23
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: 18 Apr 23
Utility
Solid-state Grow-lights for Plant Cultivation
12 Oct 23
There is provided a light emitting device, for example a grow-light, comprising: a first solid-state light source that generates blue light with a blue photon flux; and a second solid-state light source that generates red light with a red photon flux; wherein a ratio of the blue photon flux to red photon flux is from about 1:3 to about 3:1.
Yi-Qun LI, Jing Qiong ZHANG
Filed: 5 Jun 23
Utility
Narrow-band red photoluminescence materials for solid-state light emitting devices and filaments
10 Oct 23
Light emitting devices and LED-filaments comprise an excitation source (e.g.
Yi-Qun Li
Filed: 8 Nov 22
Utility
LED-filaments and LED-filament lamps
10 Oct 23
An LED-filament comprising: a partially light transmissive substrate; a plurality of LED chips on a front face of the substrate; a photoluminescence material that is in direct contact with and covers all of the plurality of LED chips; and a light scattering layer that is in direct contact with and covers at least the photoluminescence material, wherein the light scattering layer comprises particles of light scattering material, and wherein the photoluminescence material comprises broadband green to red photoluminescence materials and narrowband red photoluminescence material.
Gang Wang, Jun-Gang Zhao, Yi-Qun Li
Filed: 6 Dec 21
Utility
Full Spectrum White Light Emitting Devices
14 Sep 23
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 Oct 22
Utility
Full Spectrum White Light Emitting Devices
14 Sep 23
There is provided a full spectrum white light emitting device comprising: a broadband LED flip chip that generates broadband light of dominant wavelength from about 420 nm to about 480 nm and a FWHM from 25 nm to 50 nm; and at least one photoluminescence layer covering a light emitting face of the broadband LED flip chip; wherein the broadband LED flip chip comprises a broadband InGaN/GaN multiple quantum wells LED chip comprising multiple different wavelength quantum wells in its active region that generate multiple narrowband light emissions of multiple different wavelengths and wherein broadband light generated by the broadband LED flip chip is composed of a combination of the multiple narrowband light emissions, and wherein the at least one photoluminescence material layer comprises a first photoluminescence material which generates light with a peak emission wavelength from 490 nm to 550 nm; and a second photoluminescence material which generates light with a peak emission wavelength from 600 nm to 680 nm.
Yi-Qun Li, Xianglong Yuan, Jun-Gang Zhao
Filed: 6 Feb 23
Utility
Semiconductor Optocoupler
31 Aug 23
An optocoupler includes a GaN-based Light Emitting Diode (LED) and a GaN-based photo-detector, where at least one of the LED and photo-detector is a flip chip.
Yi-Qun Li
Filed: 22 Dec 22
Utility
Color liquid crystal displays and display backlights
18 Apr 23
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
Packaged white light emitting devices comprising photoluminescence layered structure
18 Apr 23
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
CorrectedHigh Color Rendering White Light Emitting Devices And High Color Rendering Photoluminescence Compositions
23 Mar 23
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
Full spectrum white light emitting devices
7 Feb 23
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
High Color Rendering, High Efficacy White Light Emitting Devices
8 Dec 22
A white light emitting device comprises: an LED that generates excitation light of wavelength from 420 nm to 480 nm; and photoluminescence materials that generate light with a peak emission wavelength from 500 nm to 650 nm comprising a broadband phosphor, and a manganese-activated narrowband red fluoride phosphor with a peak emission wavelength from 628 nm to 640 nm and a full width at half maximum of less than 30 nm.
Gang WANG, Yi-Qun LI
Filed: 4 Jun 22
Utility
Narrow-band red photoluminescence materials for solid-state light emitting devices and filaments
8 Nov 22
Light emitting devices and LED-filaments comprise an excitation source (e.g.
Yi-Qun Li
Filed: 22 Jun 18
Utility
High Color Gamut Photoluminescence Wavelength Converted White Light Emitting Devices
3 Nov 22
A white light emitting device (backlight) comprises: a Multiple Quantum Well (MQW) dual-wavelength LED; and a narrowband photoluminescence material that generates red light with a peak emission wavelength from about 620 nm to about 660 nm.
Yi-Qun LI
Filed: 23 Oct 20
Utility
Full spectrum white light emitting devices
25 Oct 22
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
LED-Filaments and LED-Filament Lamps
15 Sep 22
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: 28 Apr 22
Utility
Color liquid crystal displays and display backlights
13 Sep 22
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: 14 Feb 20
Utility
Solid-state Grow-lights for Plant Cultivation
18 Aug 22
There is provided a light emitting device, for example a grow-light, comprising: a grow-light comprising: a broadband blue solid-state light source that generates broadband blue light with a peak emission wavelength from 420 nm to 495 nm and a full width at half maximum of at least 30 nm.
Yi-QUN Li, Jing Qiong Zhang
Filed: 4 Feb 22
Utility
Tunable LED-Filaments and Tunable LED-Filament Lamps
4 Aug 22
A color temperature tunable LED-filament includes an elongated 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 layer covering the first array of LED chips; a second photoluminescence layer covering the second array of LED chips; and a circuit arrangement enabling independent power control to the first and second LED arrays or relative power control to the first and second array of LED chips to control the color temperature of light generated by the LED-filament.
Yi-Qun Li, Jun-Gang Zhao, Gang Wang
Filed: 12 Apr 22