Patents by Inventor Luo Hua GUANG

Luo Hua GUANG 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).

  • LED TUBE DRIVER CIRCUITRY FOR BALLAST AND NON-BALLAST FLUORESCENT TUBE REPLACEMENT
    Publication number: 20170303353
    Abstract: An LED lamp tube and driver circuit that is direct replacement for fluorescent tubes with or without ballasts, that works with standard AC high voltage current input, with high frequency pulse current input, or with lower voltage input. The tube is wired to receive the current that is input from any two electrode pins from among the pairs of pins at the ends of the tube, which house the driver circuitry. The input current is converted to DC through a rectifier circuit, is filtered of unwanted frequencies and voltage through a filter circuit, and is controlled with a step-down constant current circuit to drive an LED array within the tube. The circuits comprise current loops having at least one current transformer, at least one transistor, capacitors, inductors, and resistors and interacting with an integrated circuit.
    Type: Application
    Filed: August 28, 2015
    Publication date: October 19, 2017
    Inventor: Luo Hua Guang
  • LED tube driver circuitry for ballast and non-ballast fluorescent tube replacement
    Patent number: 9338853
    Abstract: An LED lamp tube and driver circuit that is direct replacement for fluorescent tubes with or without ballasts, that works with standard AC high voltage current input, with high frequency pulse current input, or with lower voltage input. The tube is wired to receive the current that is input from any two electrode pins from among the pairs of pins at the ends of the tube, which house the driver circuitry. The input current is converted to DC through a rectifier circuit, is filtered of unwanted frequencies and voltage through a filter circuit, and is controlled with a step-down constant current circuit to drive an LED array within the tube.
    Type: Grant
    Filed: September 17, 2014
    Date of Patent: May 10, 2016
    Assignee: Greco Tech Industries Inc.
    Inventor: Luo Hua Guang
  • LED TUBE DRIVER CIRCUITRY FOR BALLAST AND NON-BALLAST FLUORESCENT TUBE REPLACEMENT
    Publication number: 20160081147
    Abstract: An LED lamp tube and driver circuit that is direct replacement for fluorescent tubes with or without ballasts, that works with standard AC high voltage current input, with high frequency pulse current input, or with lower voltage input. The tube is wired to receive the current that is input from any two electrode pins from among the pairs of pins at the ends of the tube, which house the driver circuitry. The input current is converted to DC through a rectifier circuit, is filtered of unwanted frequencies and voltage through a filter circuit, and is controlled with a step-down constant current circuit to drive an LED array within the tube.
    Type: Application
    Filed: September 17, 2014
    Publication date: March 17, 2016
    Applicant: GRECO TECH INDUSTRIES INC.
    Inventor: Luo Hua GUANG