Patents by Inventor Chat Hoi Mo

Chat Hoi Mo 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).

  • Driving circuit and illumination device having light-emitting elements
    Patent number: 9271357
    Abstract: The present invention discloses a driving circuit including a rectifying circuit and a first current-controlling circuit. Input terminals of the rectifying circuit are connected to output terminals of an AC power source. The first current-controlling circuit and a plurality of light-emitting elements be driven are connected in series, and then are connected between two output terminals of the rectifying circuit. The driving circuit further includes a plurality of switches and a switch-controlling circuit; the switches are connected in parallel with two terminals of one or some light-emitting elements connected in series to form many light-emitting element subunits. Control-signal output terminals of the switch-controlling circuit are connected to control terminals of the switches respectively, to control the switches in an ON-OFF state according to an instantaneous value of a DC voltage outputted from the rectifying circuit, for controlling an amount of light-emitting elements which should be lighten.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: February 23, 2016
    Assignee: WISDOM TECHNOLOGIES HOLDING LIMITED
    Inventor: Chat Hoi Mo
  • DRIVING CIRCUIT AND ILLUMINATION DEVICE HAVING LIGHT-EMITTING ELEMENTS
    Publication number: 20150110141
    Abstract: The present invention discloses a driving circuit including a rectifying circuit and a first current-controlling circuit. Input terminals of the rectifying circuit are connected to output terminals of an AC power source. The first current-controlling circuit and a plurality of light-emitting elements be driven are connected in series, and then are connected between two output terminals of the rectifying circuit. The driving circuit further includes a plurality of switches and a switch-controlling circuit; the switches are connected in parallel with two terminals of one or some light-emitting elements connected in series to form many light-emitting element subunits. Control-signal output terminals of the switch-controlling circuit are connected to control terminals of the switches respectively, to control the switches in an ON-OFF state according to an instantaneous value of a DC voltage outputted from the rectifying circuit, for controlling an amount of light-emitting elements which should be lighten.
    Type: Application
    Filed: December 18, 2012
    Publication date: April 23, 2015
    Applicant: Wisdom Technologies Holding Limited
    Inventor: Chat Hoi Mo