Inverter circuit of driving a lamp and backlight module...

Details Inverter circuit of driving a lamp and backlight module... Inverter circuit of driving a lamp and backlight module...

2008-03-19

2011-10-11

Mengistu, Amare (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C315S291000

Reexamination Certificate

active

08035608

ABSTRACT:
An inverter circuit for driving a lamp and a backlight module using the same are provided. The inverter circuit includes a signal generation module, a switching unit, a first capacitor, a transformer and a first detecting module. The signal generation module generates a pulse width modulation (PWM) signal, wherein the duty cycle of the PWM signal is controlled by a feedback signal and a sensed signal. The switching unit has a control terminal receiving the PWM signal, and has a first current terminal and a second current terminal respectively coupled to a first terminal and a second terminal of the first capacitor. The transformer generates an AC driving signal to the lamp according to a signal variation of the primary winding coupled the first current terminal of the first transistor. The first detecting module generates the sensed signal according to the flowing current of the switching unit.

REFERENCES:
patent: 2006/0001385 (2006-01-01), Lee
patent: 2007/0126372 (2007-06-01), Huang et al.

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