Power supply and plasma display including the same

Details Power supply and plasma display including the same Power supply and plasma display including the same

2008-08-04

2011-10-18

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

With power factor control device

C315S291000, C315S307000, C315S18500S, C315S274000

Reexamination Certificate

active

08040072

ABSTRACT:
A power supply including a transformer primary coil coupled to an input power source and a secondary coil coupled to an output terminal, a first switch coupled to the primary coil of the transformer, a duty cycle of the first switch controlling a voltage of the output terminal, first and second resistors coupled to the output terminal in series, a third resistor having a first terminal coupled to a node common to the output terminal and the first resistor, a second switch having a first terminal coupled to a second terminal of the third resistor and having a second terminal coupled to a node common to the first and second resistors, the second switch controlled based on an accumulated driving time, and a switching controller configured to receive a feedback voltage varying according to an on/off of the second switch, and configured to control the duty cycle.

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