公开(公告)号：US20080061751A1

公开(公告)日：2008-03-13

申请号：US11623175

申请日：2007-01-15

申请人： Chin-Fa Kao ,  Chih-Shun Lee

发明人： Chin-Fa Kao ,  Chih-Shun Lee

IPC分类号： G05F1/00

CPC分类号： H03K17/6871 ,  H02M1/08 ,  H03K17/145 ,  H03K17/6872 ,  H03K17/6874

摘要： A selection device for selecting an output state of a switch device is disclosed. The selection device includes a power source, a rectification element, a driving unit, and a control unit. The switch device includes an upper-arm switch and a lower-arm switch. The power source provides a power signal. The rectification element is coupled to the power source. The driving unit includes a totem circuit coupled to the upper-arm switch and a storage element coupled to the rectification element. The control unit transmits the power signal to the driving unit by the rectification element according to a control signal. The upper-arm switch is driven by the totem circuit to select the output state when the power signal is received by the driving unit.

摘要翻译： 公开了一种用于选择开关装置的输出状态的选择装置。 选择装置包括电源，整流元件，驱动单元和控制单元。 开关装置包括上臂开关和下臂开关。 电源提供电源信号。 整流元件耦合到电源。 驱动单元包括连接到上臂开关的图腾电路和耦合到整流元件的存储元件。 控制单元根据控制信号通过整流元件将功率信号发送到驱动单元。 上臂开关由图腾电路驱动，当驱动单元接收到电源信号时选择输出状态。

公开(公告)号：US20070222739A1

公开(公告)日：2007-09-27

申请号：US11309019

申请日：2006-06-09

申请人： Chung-Che Yu ,  Li-Min Lee ,  Chin-Fa Kao

发明人： Chung-Che Yu ,  Li-Min Lee ,  Chin-Fa Kao

IPC分类号： G09G3/36

CPC分类号： G09G3/3406 ,  G09G2320/064 ,  G09G2330/04 ,  H05B33/0818 ,  H05B33/0851 ,  H05B33/0887 ,  Y02B20/341 ,  Y02B20/346

摘要： A driving circuit for a plurality of light-emitting diodes (LEDs) comprises a transformer, a driving module, and a protection module. The transformer has a primary coil and a secondary coil, wherein a first end of the primary coil is coupled to a voltage source. Furthermore, a second end of the primary coil of the transformer is coupled to the driving module. The driving module determines whether to deliver electrical power to the transformer according to a pulse-width modulation (PWM) signal and an error signal. The protection module is coupled to the secondary coil. When a driving voltage output by the transformer to the LEDs is less than a first preset voltage or greater than a second preset voltage, the protection module generates the error signal to the driving module.

摘要翻译： 用于多个发光二极管（LED）的驱动电路包括变压器，驱动模块和保护模块。 变压器具有初级线圈和次级线圈，其中初级线圈的第一端耦合到电压源。 此外，变压器的初级线圈的第二端耦合到驱动模块。 驱动模块根据脉冲宽度调制（PWM）信号和误差信号来确定是否向变压器传送电力。 保护模块耦合到次级线圈。 当变压器向LED输出的驱动电压小于第一预设电压或大于第二预置电压时，保护模块产生到驱动模块的误差信号。

公开(公告)号：US20070126373A1

公开(公告)日：2007-06-07

申请号：US11385536

申请日：2006-03-20

申请人： Chung-Che Yu ,  Chien-Pang Hung ,  Chih-Shun Lee ,  Chin-Fa Kao

发明人： Chung-Che Yu ,  Chien-Pang Hung ,  Chih-Shun Lee ,  Chin-Fa Kao

IPC分类号： H05B41/36

CPC分类号： H05B41/2828 ,  H05B41/2824 ,  H05B41/2855 ,  H05B41/2856 ,  Y02B20/186 ,  Y10S315/07

摘要： A controller for a driving circuit of power source comprises a frequency generator, a pulse width modulator, and a driving device. The frequency generator comprises a latch circuit. The frequency generator provides a pulse signal at a first frequency after the controller is started. After the frequency generator receives an indicating signal, the frequency generator changes the frequency of pulse signal from the first frequency to a second frequency and locks the frequency of pulse signal at the second frequency. The pulse width modulator provides a PWM signal according to the pulse signal and a feedback signal which indicates a status of electric power supply of the driving circuit. The driving device controls semiconductor switches according to the PWM signal.

摘要翻译： 用于电源驱动电路的控制器包括频率发生器，脉宽调制器和驱动装置。 频率发生器包括一个锁存电路。 频率发生器在控制器启动后以第一个频率提供脉冲信号。 在频率发生器接收到指示信号之后，频率发生器将脉冲信号的频率从第一频率改变到第二频率，并将脉冲信号的频率锁定在第二频率。 脉冲宽度调制器根据脉冲信号提供PWM信号，并提供指示驱动电路的电力供应状态的反馈信号。 驱动装置根据PWM信号控制半导体开关。