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    • 2. 发明授权
    • Inverter circuit of driving a lamp and backlight module using the same
    • 驱动灯的逆变电路及使用其的背光模组
    • US08035608B2
    • 2011-10-11
    • US12051495
    • 2008-03-19
    • Shwang-Shi BaiI-Sheng LinHsiu-Na HsiehShu-Ming Chang
    • Shwang-Shi BaiI-Sheng LinHsiu-Na HsiehShu-Ming Chang
    • G09G3/36
    • H05B41/2822
    • 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.
    • 提供一种用于驱动灯的逆变器电路和使用其的背光模块。 逆变器电路包括信号发生模块,开关单元,第一电容器,变压器和第一检测模块。 信号产生模块产生脉宽调制(PWM)信号,其中PWM信号的占空比由反馈信号和感测信号控制。 开关单元具有接收PWM信号的控制端子,并且具有分别耦合到第一电容器的第一端子和第二端子的第一电流端子和第二电流端子。 变压器根据耦合第一晶体管的第一电流端子的初级绕组的信号变化,向灯产生AC驱动信号。 第一检测模块根据开关单元的流动电流产生感测信号。