Patents by Inventor Yi-Qun Li

Yi-Qun Li has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240178199
    Abstract: A lighting device comprising: a first LED for generating light of a first chromaticity in a first chromaticity region defined by chromaticity coordinates (0.486, 0.410), (0.509, 0.340), (0.578, 0.405), and (0.537, 0.461); a second LED for generating light of a second chromaticity in a second chromaticity region defined by chromaticity coordinates (0.328, 0.495), (0.342, 0.390), (0.478, 0.444), and (0.464, 0.545); and a third LED for generating light of a third chromaticity in a third chromaticity region defined by chromaticity coordinates (0.195, 0.266), (0.205, 0.212), (0.286, 0.293), and (0.276, 0.328). Light generated by the device comprises a combination of light of the first, second, and third chromaticity and has a chromaticity that can be tunable by controlling power to the first, second and third LEDs.
    Type: Application
    Filed: July 28, 2023
    Publication date: May 30, 2024
    Inventors: Jingqiong ZHANG, Yi-Qun LI, Jungang ZHAO
  • Publication number: 20240145442
    Abstract: An embodiment of an LED lamp that generates light of a color temperature that decreases with decreasing power applied to the LED lamp may include at least one lighting arrangement that may include a first LED array of serially connected first LED chips, a second LED array of serially connected second LED chips; a first photoluminescence layer covering the first LED array for generating light of a first color temperature; a second photoluminescence layer covering the second LED array for generating light of a second different color temperature; and a linear resistor serially connected to the first LED array, wherein the first LED array and second LED array are connected in parallel.
    Type: Application
    Filed: January 7, 2024
    Publication date: May 2, 2024
    Inventors: Yi-Qun Li, Jun-Gang Zhao, Gang Wang
  • Publication number: 20240117946
    Abstract: 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.
    Type: Application
    Filed: October 10, 2023
    Publication date: April 11, 2024
    Inventors: Gang Wang, Jun-Gang Zhao, Yi-Qun Li
  • Publication number: 20240120448
    Abstract: A red-light emitting device comprising: a blue LED chip; and a photoluminescence material comprising a narrowband red fluoride phosphor and a broadband red phosphor. The narrowband red phosphor may comprise a manganese-activated fluoride phosphor of composition K2SiF6:Mn4+, K2GeF6:Mn4+, and K2TiF6:Mn4+.
    Type: Application
    Filed: December 8, 2023
    Publication date: April 11, 2024
    Inventors: Jingqiong ZHANG, Yi-Qun LI, Jungang ZHAO
  • Patent number: 11953195
    Abstract: 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. It may be that the broadband blue light substantially matches at least one of: the absorption peak wavelength of chlorophyll-a; the absorption peak wavelength of chlorophyll-b; and the absorption peak wavelength of carotenoid.
    Type: Grant
    Filed: June 5, 2023
    Date of Patent: April 9, 2024
    Assignee: Bridgelux, Inc.
    Inventors: Yi-Qun Li, Jing Qiong Zhang
  • Patent number: 11933461
    Abstract: 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.
    Type: Grant
    Filed: October 25, 2022
    Date of Patent: March 19, 2024
    Assignee: Bridgelux, Inc.
    Inventors: Xianglong Yuan, Yi-Qun Li
  • Patent number: 11901492
    Abstract: 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. The device generates white light with a spectrum having a broad emission peak from about 530 nm to about 600 nm and a narrow emission peak and wherein the ratio of the peak emission intensity of the broad emission peak to the peak emission intensity of the narrow emission peak is at least 20%.
    Type: Grant
    Filed: November 24, 2020
    Date of Patent: February 13, 2024
    Assignee: Intematix Corporation
    Inventors: Yi-Qun Li, Gang Wang, Haitao Yang, Binghua Chai
  • Patent number: 11887973
    Abstract: 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 n
    Type: Grant
    Filed: February 6, 2023
    Date of Patent: January 30, 2024
    Assignee: Intematix Corporation
    Inventors: Yi-Qun Li, Xianglong Yuan, Jun-Gang Zhao
  • Publication number: 20230387345
    Abstract: A light-emitting device is provided. The light-emitting device generates a white light and includes at least one light-emitting diode. The at least one light-emitting diode generates a light beam with a broadband blue spectrum and includes a first semiconductor layer, a second semiconductor layer and a multiple quantum well structure. The multiple quantum well structure is located between the first semiconductor layer and the second semiconductor layer, and includes well layers and barrier layers. The well layers include a first well layer, a second well layer and third well layers different in indium concentrations. The first well layer has the largest indium concentration, and the third well layers have the smallest indium concentration.
    Type: Application
    Filed: August 10, 2023
    Publication date: November 30, 2023
    Inventors: BEN-JIE FAN, JING-QIONG ZHANG, YI-QUN LI, HUNG-CHIH YANG, TSUNG-CHIEH LIN, HO-CHIEN CHEN, SHUEN-TA TENG, CHENG-CHANG HSIEH
  • Publication number: 20230387358
    Abstract: 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. The device/CSP LED can further include a further photoluminescence layer that covers the first photoluminescence and that includes a photoluminescence material that generates light with a peak emission wavelength from 500 nm to 650 nm.
    Type: Application
    Filed: April 18, 2023
    Publication date: November 30, 2023
    Inventors: Jun-Gang Zhou, Gang Wang, Yi-Qun Li
  • Publication number: 20230358943
    Abstract: 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). The photoluminescence wavelength conversion layer (152) comprises a mixture of a green-emitting photoluminescence material with a peak emission in a wavelength range 530 nm to 545 nm, a red-emitting photoluminescence material with a peak emission in a wavelength range 600 nm to 650 nm and particles of light scattering material.
    Type: Application
    Filed: April 18, 2023
    Publication date: November 9, 2023
    Inventors: Yi-Qun Li, Xianglong Yuan
  • Publication number: 20230352636
    Abstract: An exemplary white light emitting device includes a plurality of LEDs disposed on a substrate, where the LEDs emit blue light at substantially the same correlated color temperature; a first photoluminescence material layer disposed over a first subset of the LEDs; a second photoluminescence material layer disposed over a second subset of the LEDs different from the first subset of the plurality of LEDs, the second photoluminescence material layer separate from the first photoluminescence material layer; and a diffusing layer separate from and disposed over the first and second photoluminescence layers, where the diffusing layer is associated with a plurality of light scattering particles.
    Type: Application
    Filed: July 3, 2023
    Publication date: November 2, 2023
    Inventors: Tao Xu, Aaron Merrill, Yi-Qun Li
  • Publication number: 20230324029
    Abstract: 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. It may be that the broadband blue light substantially matches at least one of: the absorption peak wavelength of chlorophyll-a; the absorption peak wavelength of chlorophyll-b; and the absorption peak wavelength of carotenoid.
    Type: Application
    Filed: June 5, 2023
    Publication date: October 12, 2023
    Inventors: Yi-Qun LI, Jing Qiong ZHANG
  • Patent number: 11781714
    Abstract: 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.
    Type: Grant
    Filed: December 6, 2021
    Date of Patent: October 10, 2023
    Assignee: Bridgelux, Inc.
    Inventors: Gang Wang, Jun-Gang Zhao, Yi-Qun Li
  • Patent number: 11781065
    Abstract: Light emitting devices and LED-filaments comprise an excitation source (e.g. LED) and a photoluminescence material comprising a combination of a first narrow-band red photoluminescence material which generates light with a peak emission wavelength in a range 580 nm to 628 nm and a full width at half maximum emission intensity in a range 45 nm to 60 nm and a second narrow-band red photoluminescence material generates light with a peak emission wavelength in a range 628 nm to 640 nm and a full width at half maximum emission intensity in a range 5 nm to 20 nm. At least one of the first and second narrow-band red photoluminescence materials can comprise a narrow-band red phosphor or a quantum dot (QD) material.
    Type: Grant
    Filed: November 8, 2022
    Date of Patent: October 10, 2023
    Assignee: Intematix Corporation
    Inventor: Yi-Qun Li
  • Patent number: 11777053
    Abstract: A light-emitting diode is provided. The light-emitting diode includes a P-type semiconductor layer, a N-type semiconductor layer, and a light-emitting stack located therebetween. The light-emitting stack includes a plurality of well layers and a plurality of barrier layers that are alternately stacked, the well layers includes at least one first well layer, at least one second well layer, and third well layers that have different indium concentrations. The first well layer has the largest indium concentration, and the third well layers have the smallest indium concentration. Three of well layers that are closest to the P-type semiconductor layer are the third well layers, and the first well layer is closer to the N-type semiconductor layer than the P-type semiconductor layer.
    Type: Grant
    Filed: February 1, 2022
    Date of Patent: October 3, 2023
    Assignee: KAISTAR LIGHTING(XIAMEN) CO., LTD.
    Inventors: Ben-Jie Fan, Jing-Qiong Zhang, Yi-Qun Li, Hung-Chih Yang, Tsung-Chieh Lin, Ho-Chien Chen, Shuen-Ta Teng, Cheng-Chang Hsieh
  • Publication number: 20230290759
    Abstract: 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 n
    Type: Application
    Filed: February 6, 2023
    Publication date: September 14, 2023
    Inventors: Yi-Qun Li, Xianglong Yuan, Jun-Gang Zhao
  • Publication number: 20230288033
    Abstract: 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.
    Type: Application
    Filed: October 25, 2022
    Publication date: September 14, 2023
    Inventors: Xianglong Yuan, Yi-Qun Li
  • Publication number: 20230275075
    Abstract: 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. In some embodiments, the photo-detector comprises a GaN-based LED configured to operate as a photo-detector.
    Type: Application
    Filed: December 22, 2022
    Publication date: August 31, 2023
    Inventor: Yi-Qun Li
  • Publication number: 20230275178
    Abstract: An optocoupler includes a light output chip and a light-sensing chip. A light-receiving surface of the light-sensing chip is disposed to face a light output surface of the light output chip. The light-sensing chip and the light output chip are a blue light-emitting diode and a green light-emitting diode, respectively. Accordingly, the optocoupler has a stable output performance at a working temperature ranging from ?55° C. to 150° C. and a high response frequency.
    Type: Application
    Filed: March 9, 2023
    Publication date: August 31, 2023
    Inventors: GUO-HENG QIN, YI-QUN LI, YEH-YIN CHOU