Patents by Inventor Eongen Yan

Eongen Yan 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).

  • Four-electrode fluorescent lamp and the circuit for arranging the same
    Patent number: 6756745
    Abstract: A four-electrode fluorescent, lamp having four filaments in a fluorescent lamp; each of the filament having two leads for being connected to a positive and a negative electrodes of a power source. A resistor is serially connected between a lead of one selective filament and a lead of another selective filaments. Each of the filaments is controlled by a transistor. A pair of capacitors are used to adjust the switching current of a pair of two transistors. The base of the transistor is connected to a respective diode set through a current limiting resistor. Each of the transistor is connected to a diode set. The four diodes are serially connected as a loop with two ends of the loop being connected to two ends of an AC power source. Thereby, a circuit for an alternative lighting four-electrode fluorescent lamp is formed.
    Type: Grant
    Filed: March 27, 2003
    Date of Patent: June 29, 2004
    Inventors: Tieng-Fu Lin, Eongen Yan
  • High-efficiency and light-adjustable lighting means of two-electrode lamp
    Patent number: 6566818
    Abstract: A lighting and starting device for two-electrode lamp includes a plurality of voltage-multiplier rectifying circuits parallelly connected to two electrodes of the lamp with stepping voltages, for instance, high, medium and low voltage levels, whereby upon selection of the desired voltage level, the light of the lamp can be adjusted optimumly.
    Type: Grant
    Filed: January 22, 2002
    Date of Patent: May 20, 2003
    Inventors: Tieng-fu Lin, Eongen Yan