Patents by Inventor Yl-Qun Li

Yl-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).

  • Phosphor-converted red LEDs and color-tunable multi-LED lighting devices
    Patent number: 11817531
    Abstract: A lighting device comprising: a first LED having a wavelength of maximum emission intensity from 620 nm to 640 nm; a second LED having a wavelength of maximum emission intensity from 500 nm to 565 nm; a third LED having a wavelength of maximum emission intensity from 430 nm to 480 nm; and a fourth LED for generating light comprising a CCT in a range from 1800K to 5000K. The first LED comprises a Phosphor-Converted LED comprising a first LED chip having a maximum emission intensity wavelength from 400 nm to 480 nm, and a narrowband red phosphor with a FWHM less than 55 nm. Light generated by the device comprises a combination of light generated by the first, second, third, and fourth LEDs and a CCT of light generated by the device is tunable by independently controlling power to the first, second, third, and fourth LEDs.
    Type: Grant
    Filed: April 25, 2023
    Date of Patent: November 14, 2023
    Assignee: Bridgelux, Inc.
    Inventors: Yl-Qun Li, Jingqiong Zhang, Jungang Zhao