Patents by Inventor POH NG

POH NG 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).

  • Lighting control circuit and method for multiple LEDs
    Patent number: 10542597
    Abstract: A lighting control circuit (10) for controlling a plurality of LEDs (24, 26). The lighting control circuit (10) includes a current source (12) coupleable to a first LED (20) and a second LED (22); a first switch (24) configured to switch from an open position to a closed position when driven by a first drive signal (V3), wherein the first switch (24) is positioned to interrupt current flow (Iout) through the first LED (20) when the first switch (24) is in the open position; a second switch (26) configured to switch from an open position to a closed position when driven by a second drive signal (V4), the second drive signal (V4) being temporally non-overlapping with respect to the first drive signal (V3), wherein the second switch (26) is positioned to interrupt current flow (Iout) through the second LED (22) when the second switch (30) is in the open position.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: January 21, 2020
    Assignee: SIGNIFY HOLDING B.V.
    Inventor: Poh Ng
  • LIGHTING CONTROL CIRCUIT AND METHOD FOR MULTIPLE LEDS
    Publication number: 20180352622
    Abstract: A lighting control circuit (10) for controlling a plurality of LEDs (24, 26). The lighting control circuit (10) includes a current source (12) coupleable to a first LED (20) and a second LED (22); a first switch (24) configured to switch from an open position to a closed position when driven by a first drive signal (V3), wherein the first switch (24) is positioned to interrupt current flow (Iout) through the first LED (20) when the first switch (24) is in the open position; a second switch (26) configured to switch from an open position to a closed position when driven by a second drive signal (V4), the second drive signal (V4) being temporally non-overlapping with respect to the first drive signal (V3), wherein the second switch (26) is positioned to interrupt current flow (Iout) through the second LED (22) when the second switch (30) is in the open position.
    Type: Application
    Filed: September 2, 2016
    Publication date: December 6, 2018
    Inventor: POH NG