Patents by Inventor Daniel L. Twadell

Daniel L. Twadell 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).

  • Control device having buttons with multiple-level backlighting
    Patent number: 10827576
    Abstract: A control device may have a plurality of buttons that may be backlit to multiple levels, such as first, second, and third adjacent buttons positioned in order, and first, second, and third LEDs positioned to illuminate a respective button. The control device may be configured to illuminate the first LED to a first LED illumination intensity to illuminate the respective button to a first surface illumination intensity; illuminate the third LED to a second LED illumination intensity to illuminate the respective button to a second surface illumination intensity; and illuminate the second LED to a third LED illumination intensity to illuminate the respective button to the second surface illumination intensity. The third LED illumination intensity may be less than the second LED illumination intensity, which may be less than the first LED illumination intensity, and the second surface illumination intensity may be less than the first surface illumination intensity.
    Type: Grant
    Filed: February 6, 2020
    Date of Patent: November 3, 2020
    Assignee: Lutron Technology Company LLC
    Inventors: Matthew Philip McDonald, Daniel L. Twadell, Jason C. Killo