US Patent No. 9,967,930

DRIVE SYSTEM OF SEMICONDUCTOR LIGHT SOURCE, AND SEMICONDUCTOR LIGHTING DEVICE


Patent No. 9,967,930
Issue Date May 08, 2018
Title Drive System Of Semiconductor Light Source, And Semiconductor Lighting Device
Inventorship Xiaoming Qi, Shanghai (CN)
Assignee OPPLE LIGHTING CO., LTD., Shanghai (CN)

Claim of US Patent No. 9,967,930

1. A driving system for a semiconductor light source including:a transformer (II) including a first coil (201) and a second coil (202) coupled to each other, wherein a first terminal of the second coil (202) is connected to a first voltage input terminal for receiving an input voltage, wherein an induced signal is generated on the first coil (201) of the transformer due to a coupling effect between the first coil (201) and the second coil (202);
a switching means (III) connected to the second coil (202) of the transformer in series and for controlling energy-storing and energy-releasing of the second coil (202);
an outputting means (IV) connected to the second coil (202) of the transformer in parallel and for supplying power to the semiconductor light source, wherein a first terminal of the outputting means is connected to the first terminal of the second coil, and a second terminal of the outputting means is connected to a second terminal of the second coil,
wherein the switching means includes a switch (300), a capacitive element (203) and a resistive element (204),
wherein the capacitive element (203) and the resistive element (204) are connected in series between one end of the first coil (201) and a control terminal (301) of the switch (300), the other end of the first coil (201) of the transformer is grounded, and the induced signal generated on the first coil (201) is adapted to control charging and discharging of the capacitive element (203), and the charging and discharging of the capacitive element (203) is adapted to control turn-on and turn-off of the switch (300).