公开(公告)号：US07759877B2

公开(公告)日：2010-07-20

申请号：US11927692

申请日：2007-10-30

申请人： Shwang-Shi Bai ,  Shu-Ming Chang ,  Hsiu-Na Hsieh

发明人： Shwang-Shi Bai ,  Shu-Ming Chang ,  Hsiu-Na Hsieh

IPC分类号： H05B41/24

CPC分类号： H05B41/2825

摘要： A driving system, includes: a power supply unit for providing a first current and a second current; a first transformer having a primary side coupled to the power supply unit and a secondary side coupled to a first current balancing circuit for driving a plurality of first lamps; a second transformer having a primary side coupled to the power supply unit and a secondary side coupled to a second current balancing circuit for driving a plurality of second lamps; a balancing control circuit coupled to the power supply unit for balancing the first and the second current so that the first current and the second current are substantially equal.

摘要翻译： 驱动系统包括：用于提供第一电流和第二电流的电源单元; 第一变压器，其具有耦合到所述电源单元的初级侧和耦合到用于驱动多个第一灯的第一电流平衡电路的次级侧; 第二变压器，其具有耦合到所述电源单元的初级侧和耦合到用于驱动多个第二灯的第二电流平衡电路的次级侧; 耦合到电源单元的平衡控制电路，用于平衡第一和第二电流，使得第一电流和第二电流基本相等。

公开(公告)号：US20080061705A1

公开(公告)日：2008-03-13

申请号：US11850336

申请日：2007-09-05

申请人： Shwang-Shi Bai ,  Hsiu-Na Hsieh ,  Shu-Ming Chang

发明人： Shwang-Shi Bai ,  Hsiu-Na Hsieh ,  Shu-Ming Chang

IPC分类号： H05B41/36

CPC分类号： H05B41/2822

摘要： A power supply circuit for transforming a direct-current voltage into an alternating-current voltage for a light source is provided. The power supply circuit includes a drive circuit, a switch, a transformer and a capacitor. The switch has a control terminal coupled to the drive circuit and a ground terminal coupled to a ground. The transformer has a primary side and a secondary side, and a winding on the primary side is coupled between the direct-current voltage and a signal terminal of the switch to generate the alternating-current voltage on the secondary side. The capacitor is coupled between the ground terminal and the signal terminal of the switch.

摘要翻译： 提供了用于将直流电压转换为用于光源的交流电压的电源电路。 电源电路包括驱动电路，开关，变压器和电容器。 开关具有耦合到驱动电路的控制端子和耦合到地的接地端子。 变压器具有初级侧和次级侧，并且初级侧的绕组被耦合在直流电压和开关的信号端子之间，以在次级侧产生交流电压。 电容器耦合在接地端子和开关的信号端子之间。

公开(公告)号：US07759875B2

公开(公告)日：2010-07-20

申请号：US12047880

申请日：2008-03-13

申请人： Shwang-Shi Bai ,  Hsiu-Na Hsieh ,  Shu-Ming Chang

发明人： Shwang-Shi Bai ,  Hsiu-Na Hsieh ,  Shu-Ming Chang

IPC分类号： H05B37/02

CPC分类号： H05B41/2821

摘要： A backlight module and a current providing circuit thereof are provided. The current providing circuit includes a signal generating unit, a switching unit, a first capacitor, a transformer and an output node. The signal generating unit generates a PWM signal according to a level of a power source. The switching unit determines whether a first signal end and a second signal end of the switching unit are conducted according to the PWM signal received by a control end of the switching unit. Following a switch performed by the switching unit, the first capacitor charges and discharges through a current path provided by a primary coil of the transformer. Thereby, a secondary coil of the transformer generates a corresponding AC voltage by sensing a current change in the primary coil and outputs the AC voltage through the output node.

摘要翻译： 提供了一种背光模块及其电流提供电路。 电流提供电路包括信号发生单元，开关单元，第一电容器，变压器和输出节点。 信号生成单元根据电源的电平生成PWM信号。 开关单元根据由开关单元的控制端接收到的PWM信号确定开关单元的第一信号端和第二信号端是否导通。 在由开关单元进行的开关之后，第一电容器通过由变压器的初级线圈提供的电流路径进行充电和放电。 因此，变压器的次级线圈通过感测初级线圈中的电流变化而产生相应的AC电压，并通过输出节点输出AC电压。

公开(公告)号：US20090237346A1

公开(公告)日：2009-09-24

申请号：US12051495

申请日：2008-03-19

申请人： Shwang-Shi Bai ,  I-SHENG Lin ,  Hsiu-Na Hsieh ,  Shu-Ming Chang

发明人： Shwang-Shi Bai ,  I-SHENG Lin ,  Hsiu-Na Hsieh ,  Shu-Ming Chang

IPC分类号： G09G3/36

CPC分类号： H05B41/2822

摘要： 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.

摘要翻译： 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。

公开(公告)号：US08035608B2

公开(公告)日：2011-10-11

申请号：US12051495

申请日：2008-03-19

申请人： Shwang-Shi Bai ,  I-Sheng Lin ,  Hsiu-Na Hsieh ,  Shu-Ming Chang

发明人： Shwang-Shi Bai ,  I-Sheng Lin ,  Hsiu-Na Hsieh ,  Shu-Ming Chang

IPC分类号： G09G3/36

CPC分类号： H05B41/2822

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20090108771A1

公开(公告)日：2009-04-30

申请号：US11927692

申请日：2007-10-30

申请人： Shwang-Shi Bai ,  Shu-Ming Chang ,  Hsiu-Na Hsieh

发明人： Shwang-Shi Bai ,  Shu-Ming Chang ,  Hsiu-Na Hsieh

IPC分类号： H05B41/36 ,  H05B39/04

CPC分类号： H05B41/2825

摘要： A driving system, includes: a power supply unit for providing a first current and a second current; a first transformer having a primary side coupled to the power supply unit and a secondary side coupled to a first current balancing circuit for driving a plurality of first lamps; a second transformer having a primary side coupled to the power supply unit and a secondary side coupled to a second current balancing circuit for driving a plurality of second lamps; a balancing control circuit coupled to the power supply unit for balancing the first and the second current so that the first current and the second current are substantially equal.

摘要翻译： 驱动系统包括：用于提供第一电流和第二电流的电源单元; 第一变压器，其具有耦合到所述电源单元的初级侧和耦合到用于驱动多个第一灯的第一电流平衡电路的次级侧; 第二变压器，其具有耦合到所述电源单元的初级侧和耦合到用于驱动多个第二灯的第二电流平衡电路的次级侧; 耦合到电源单元的平衡控制电路，用于平衡第一和第二电流，使得第一电流和第二电流基本相等。

公开(公告)号：US07701737B2

公开(公告)日：2010-04-20

申请号：US12055974

申请日：2008-03-26

申请人： Shwang-Shi Bai ,  Hsiu-Na Hsieh ,  Shu-Ming Chang

发明人： Shwang-Shi Bai ,  Hsiu-Na Hsieh ,  Shu-Ming Chang

IPC分类号： H02M7/48

CPC分类号： H02M7/537 ,  H05B41/2824

摘要： A DC-AC converter includes a signal generating module, a first switch, a first capacitor, a transformer, and a trigger signal generating module. The signal generating module generates a pulse width modulation (PWM) signal according to a trigger signal. The first switch has a control terminal receiving the PWM signal, and a first terminal and a second terminal coupled to a first terminal and a second terminal of the first capacitor respectively. The transformer has a primary winding coupled to the second terminal of the first switch, and a secondary winding coupled to a load. The transformer generates a driving signal to the load according to a signal variation of the primary winding. The trigger signal generating module compares a first signal outputted from the second terminal of the first switch with a phase delay signal thereof and thereby generates the trigger signal for controlling the frequency of the PWM signal.

摘要翻译： DC-AC转换器包括信号产生模块，第一开关，第一电容器，变压器和触发信号产生模块。 信号发生模块根据触发信号产生脉宽调制（PWM）信号。 第一开关具有接收PWM信号的控制端子，以及分别耦合到第一电容器的第一端子和第二端子的第一端子和第二端子。 变压器具有耦合到第一开关的第二端子的初级绕组和耦合到负载的次级绕组。 变压器根据初级绕组的信号变化产生负载的驱动信号。 触发信号生成模块将从第一开关的第二端子输出的第一信号与其相位延迟信号进行比较，从而生成用于控制PWM信号的频率的触发信号。

公开(公告)号：US20090244946A1

公开(公告)日：2009-10-01

申请号：US12055974

申请日：2008-03-26

申请人： Shwang-Shi Bai ,  Hsiu-Na Hsieh ,  Shu-Ming Chang

发明人： Shwang-Shi Bai ,  Hsiu-Na Hsieh ,  Shu-Ming Chang

IPC分类号： H02M7/537

CPC分类号： H02M7/537 ,  H05B41/2824

摘要： A DC-AC converter includes a signal generating module, a first switch, a first capacitor, a transformer, and a trigger signal generating module. The signal generating module generates a pulse width modulation (PWM) signal according to a trigger signal. The first switch has a control terminal receiving the PWM signal, and a first terminal and a second terminal coupled to a first terminal and a second terminal of the first capacitor respectively. The transformer has a primary winding coupled to the second terminal of the first switch, and a secondary winding coupled to a load. The transformer generates a driving signal to the load according to a signal variation of the primary winding. The trigger signal generating module compares a first signal outputted from the second terminal of the first switch with a phase delay signal thereof and thereby generates the trigger signal for controlling the frequency of the PWM signal.

摘要翻译： DC-AC转换器包括信号产生模块，第一开关，第一电容器，变压器和触发信号产生模块。 信号发生模块根据触发信号产生脉宽调制（PWM）信号。 第一开关具有接收PWM信号的控制端子，以及分别耦合到第一电容器的第一端子和第二端子的第一端子和第二端子。 变压器具有耦合到第一开关的第二端子的初级绕组和耦合到负载的次级绕组。 变压器根据初级绕组的信号变化产生负载的驱动信号。 触发信号生成模块将从第一开关的第二端子输出的第一信号与其相位延迟信号进行比较，从而生成用于控制PWM信号的频率的触发信号。

公开(公告)号：US20080265791A1

公开(公告)日：2008-10-30

申请号：US12047880

申请日：2008-03-13

申请人： Shwang-Shi Bai ,  Hsiu-Na Hsieh ,  Shu-Ming Chang

发明人： Shwang-Shi Bai ,  Hsiu-Na Hsieh ,  Shu-Ming Chang

IPC分类号： H05B37/02 ,  H02M7/537

CPC分类号： H05B41/2821

摘要： A backlight module and a current providing circuit thereof are provided. The current providing circuit includes a signal generating unit, a switching unit, a first capacitor, a transformer and an output node. The signal generating unit generates a PWM signal according to a level of a power source. The switching unit determines whether a first signal end and a second signal end of the switching unit are conducted according to the PWM signal received by a control end of the switching unit. Following a switch performed by the switching unit, the first capacitor charges and discharges through a current path provided by a primary coil of the transformer. Thereby, a secondary coil of the transformer generates a corresponding AC voltage by sensing a current change in the primary coil and outputs the AC voltage through the output node.

摘要翻译： 提供了一种背光模块及其电流提供电路。 电流提供电路包括信号发生单元，开关单元，第一电容器，变压器和输出节点。 信号生成单元根据电源的电平生成PWM信号。 开关单元根据由开关单元的控制端接收到的PWM信号确定开关单元的第一信号端和第二信号端是否导通。 在由开关单元进行的开关之后，第一电容器通过由变压器的初级线圈提供的电流路径进行充电和放电。 因此，变压器的次级线圈通过感测初级线圈中的电流变化而产生相应的AC电压，并通过输出节点输出AC电压。