公开(公告)号：US20080290906A1

公开(公告)日：2008-11-27

申请号：US11781969

申请日：2007-07-24

申请人： Yi-Chung Chou ,  Hsu-Min Chen

发明人： Yi-Chung Chou ,  Hsu-Min Chen

IPC分类号： H03K5/153

CPC分类号： H05B33/0827 ,  H05B33/0815 ,  Y02B20/347

摘要： A constant-current driving circuit includes a first current source, a reference voltage generating circuit and an output signal generating circuit. A terminal of the first current source is coupled to a terminal of a first LED string, wherein the terminal of the first current source has a first voltage. The reference voltage generating circuit is used for generating a reference voltage and comparing the first voltage with a first predetermined voltage to generate a first comparing signal to thereby adjust the reference voltage. The output signal generating circuit is used for outputting an output signal to another terminal of the first LED string and receiving the input signal, wherein the output signal generating circuit decides whether or not to output the input signal serving as the output signal according to the comparison result of the reference voltage with the second voltage.

摘要翻译： 恒流驱动电路包括第一电流源，参考电压产生电路和输出信号发生电路。 第一电流源的端子耦合到第一LED串的端子，其中第一电流源的端子具有第一电压。 参考电压产生电路用于产生参考电压并将第一电压与第一预定电压进行比较以产生第一比较信号从而调节参考电压。 输出信号发生电路用于将输出信号输出到第一LED串的另一个端子并接收输入信号，其中输出信号发生电路根据比较决定是否输出用作输出信号的输入信号 参考电压与第二电压的结果。

公开(公告)号：US09904642B2

公开(公告)日：2018-02-27

申请号：US14887263

申请日：2015-10-19

申请人： Yi-Chung Chou ,  Dong-Shan Chen ,  Chih-Chieh Wu

发明人： Yi-Chung Chou ,  Dong-Shan Chen ,  Chih-Chieh Wu

IPC分类号： G06F11/30 ,  G06F13/20 ,  G06F13/40 ,  G06F13/42

CPC分类号： G06F13/4022 ,  G06F11/3027 ,  G06F11/3041 ,  G06F11/3051 ,  G06F13/20 ,  G06F13/4068 ,  G06F13/4282

摘要： A detection circuit of Universal Serial Bus (USB) is provided. A port of the USB has a first configuration channel pin and a second configuration channel pin, and the first and second configuration channel pins are disposed on opposite sides. The detection circuit includes a switch unit and a detection unit. The switch unit is coupled to the first and second configuration channel pins to sequentially provide a first voltage level of the first configuration channel pin and a second voltage level of the second configuration channel pin. The detection unit is coupled to the switch unit and correspondingly provides a state reference signal according to the first and second voltage levels.

公开(公告)号：US20170017598A1

公开(公告)日：2017-01-19

申请号：US14887263

申请日：2015-10-19

申请人： Yi-Chung Chou ,  Dong-Shan Chen ,  Chih-Chieh Wu

发明人： Yi-Chung Chou ,  Dong-Shan Chen ,  Chih-Chieh Wu

IPC分类号： G06F13/40 ,  G06F13/42

CPC分类号： G06F13/4022 ,  G06F11/3027 ,  G06F11/3041 ,  G06F11/3051 ,  G06F13/20 ,  G06F13/4068 ,  G06F13/4282

摘要： A detection circuit of Universal Serial Bus (USB) is provided. A port of the USB has a first configuration channel pin and a second configuration channel pin, and the first and second configuration channel pins are disposed on opposite sides. The detection circuit includes a switch unit and a detection unit. The switch unit is coupled to the first and second configuration channel pins to sequentially provide a first voltage level of the first configuration channel pin and a second voltage level of the second configuration channel pin. The detection unit is coupled to the switch unit and correspondingly provides a state reference signal according to the first and second voltage levels.

摘要翻译： 提供通用串行总线（USB）的检测电路。 USB的端口具有第一配置通道引脚和第二配置通道引脚，并且第一和第二配置通道引脚设置在相对的两侧。 检测电路包括开关单元和检测单元。 开关单元耦合到第一和第二配置通道引脚，以顺序地提供第一配置通道引脚的第一电压电平和第二配置通道引脚的第二电压电平。 检测单元耦合到开关单元，并且相应地根据第一和第二电压电平提供状态参考信号。

公开(公告)号：US07843279B2

公开(公告)日：2010-11-30

申请号：US12406953

申请日：2009-03-18

申请人： Yi-Chung Chou ,  Tung-Shan Chen

发明人： Yi-Chung Chou ,  Tung-Shan Chen

IPC分类号： H03K3/0231 ,  H03L1/02

CPC分类号： H03B5/24

摘要： A low temperature coefficient oscillator including a current generator, a first and a second voltage generator, an amplifier, a resistor, a switch, a capacitor and an oscillating unit is provided. The current generator generates a first through a fourth current according to a control signal. The first voltage generator generates a first voltage according to the first current. The second voltage generator generates a second voltage according to the second current and a frequency signal. The amplifier generates the control signal according the first and second voltages. The resistor is coupled between a first terminal of the switch and ground, and a first terminal thereof receives the third current. The switch is conducted or not according the frequency signal. The capacitor is coupled between a second terminal of the switch and ground. The oscillating unit generates the frequency signal according to the fourth current and a voltage of the capacitor.

摘要翻译： 提供了包括电流发生器，第一和第二电压发生器，放大器，电阻器，开关，电容器和振荡单元的低温度系数振荡器。 电流发生器根据控制信号产生第一至第四电流。 第一电压发生器根据第一电流产生第一电压。 第二电压发生器根据第二电流和频率信号产生第二电压。 放大器根据第一和第二电压产生控制信号。 电阻器耦合在开关的第一端子和地之间，并且其第一端子接收第三电流。 开关是根据频率信号进行的。 电容器耦合在开关的第二端子和地之间。 振荡单元根据第四电流和电容器的电压产生频率信号。

公开(公告)号：US20100171559A1

公开(公告)日：2010-07-08

申请号：US12406953

申请日：2009-03-18

申请人： Yi-Chung Chou ,  Tung-Shan Chen

发明人： Yi-Chung Chou ,  Tung-Shan Chen

IPC分类号： G05D23/20

CPC分类号： H03B5/24

摘要： A low temperature coefficient oscillator including a current generator, a first and a second voltage generator, an amplifier, a resistor, a switch, a capacitor and an oscillating unit is provided. The current generator generates a first through a fourth current according to a control signal. The first voltage generator generates a first voltage according to the first current. The second voltage generator generates a second voltage according to the second current and a frequency signal. The amplifier generates the control signal according the first and second voltages. The resistor is coupled between a first terminal of the switch and ground, and a first terminal thereof receives the third current. The switch is conducted or not according the frequency signal. The capacitor is coupled between a second terminal of the switch and ground. The oscillating unit generates the frequency signal according to the fourth current and a voltage of the capacitor.

摘要翻译： 提供了包括电流发生器，第一和第二电压发生器，放大器，电阻器，开关，电容器和振荡单元的低温度系数振荡器。 电流发生器根据控制信号产生第一至第四电流。 第一电压发生器根据第一电流产生第一电压。 第二电压发生器根据第二电流和频率信号产生第二电压。 放大器根据第一和第二电压产生控制信号。 电阻器耦合在开关的第一端子和地之间，并且其第一端子接收第三电流。 开关是根据频率信号进行的。 电容器耦合在开关的第二端子和地之间。 振荡单元根据第四电流和电容器的电压产生频率信号。

公开(公告)号：US20090315473A1

公开(公告)日：2009-12-24

申请号：US12238455

申请日：2008-09-26

申请人： Ming-Heng Tsai ,  Yi-Chung Chou

发明人： Ming-Heng Tsai ,  Yi-Chung Chou

IPC分类号： H05B41/36 ,  H05B37/02

CPC分类号： H05B33/0815

摘要： A light-emitting device driving circuit and a method thereof are provided. A terminal of a light-emitting device is coupled to a supply voltage and a cathode of a diode via an inductor, and the other terminal is coupled to an anode of the diode. The light-emitting device driving circuit includes a switch, a current-sensing circuit, and a switch control circuit. The current-sensing circuit is coupled to the anode of the diode via the switch to determine whether or not to generate a turning-off control signal according to a conducting-current value of the switch. The switch control circuit controls an on/off state of the switch, and turns off the switch according to the turning-off control signal. Besides, the switch control circuit compares the conducting-current value with a reference-current value to generate a comparing result to dynamically adjust a time length of turning off the switch accordingly.

摘要翻译： 提供一种发光器件驱动电路及其方法。 发光器件的端子通过电感器耦合到二极管的电源电压和阴极，而另一个端子耦合到二极管的阳极。 发光装置驱动电路包括开关，电流检测电路和开关控制电路。 电流检测电路经由开关耦合到二极管的阳极，以根据开关的导通电流值来确定是否产生关断控制信号。 开关控制电路控制开关的接通/断开状态，并根据关断控制信号关断开关。 此外，开关控制电路将导通电流值与基准电流值进行比较，以产生比较结果，以动态地调整关断开关的时间长度。

公开(公告)号：US20080106505A1

公开(公告)日：2008-05-08

申请号：US11623092

申请日：2007-01-15

申请人： Yi-Chung Chou

发明人： Yi-Chung Chou

IPC分类号： G09G3/32

CPC分类号： H05B33/0866 ,  H05B33/0815

摘要： An LED driver and a display device using the same are disclosed. The LED driver is adapted for driving a first set of LEDs and a second set of LEDs. The LED driver includes an inductor, a main switch, a first switch, a second switch, and a controller. The inductor has a first terminal receiving an input voltage. The main switch is coupled between a second terminal of the inductor and a common level for adjusting a current flowing therethrough. The first switch is coupled between the first set of LEDs and the second terminal of the inductor. The second switch is coupled between the second LEDs and the second terminal of the inductor. The controller is coupled to controlling terminals of the main switch, the first switch, and the second switch respectively for controlling conducting statuses of the main switch, the first switch, and the second switch respectively.

摘要翻译： 公开了一种LED驱动器及使用该驱动器的显示装置。 LED驱动器适于驱动第一组LED和第二组LED。 LED驱动器包括电感器，主开关，第一开关，第二开关和控制器。 电感器具有接收输入电压的第一端子。 主开关耦合在电感器的第二端子和用于调节流过其中的电流的公共电平之间。 第一开关耦合在第一组LED和电感器的第二端之间。 第二开关耦合在第二LED和电感器的第二端之间。 控制器分别耦合到主开关，第一开关和第二开关的控制端子，用于分别控制主开关，第一开关和第二开关的导通状态。

公开(公告)号：US20070013436A1

公开(公告)日：2007-01-18

申请号：US11192892

申请日：2005-07-28

申请人： Yi-Chung Chou

发明人： Yi-Chung Chou

IPC分类号： G05F1/10

CPC分类号： G05F3/30

摘要： The present invention provides a bandgap reference circuit, which includes a first current source, a second current source, a first reference circuit, a second reference circuit, and a selection circuit. The first reference circuit is coupled to the first current source and the second current source for outputting a first voltage signal. The second reference circuit is coupled to the first current source and the second current source for outputting a second voltage signal, wherein there is a phase difference between the first voltage signal and the second voltage signal. The selection circuit is coupled to the first reference circuit and the second reference circuit. One of the first voltage signal and the second voltage signal is alternatively selected by the selection circuit as an output reference voltage.

摘要翻译： 本发明提供一种带隙参考电路，其包括第一电流源，第二电流源，第一参考电路，第二参考电路和选择电路。 第一参考电路耦合到第一电流源和第二电流源，用于输出第一电压信号。 第二参考电路耦合到第一电流源和第二电流源，用于输出第二电压信号，其中在第一电压信号和第二电压信号之间存在相位差。 选择电路耦合到第一参考电路和第二参考电路。 第一电压信号和第二电压信号之一由选择电路交替选择作为输出参考电压。

公开(公告)号：US20060284668A1

公开(公告)日：2006-12-21

申请号：US11161789

申请日：2005-08-17

申请人： Yi-Chung Chou

发明人： Yi-Chung Chou

IPC分类号： G05F1/10

CPC分类号： G05F3/30

摘要： A bandgap reference circuit, taking two or more power supplies as the input power supply for outputting a reference voltage, includes a first reference circuit, a second reference circuit, a power selection circuit and a switch circuit. The first and second reference circuits receive two respective power supplies for producing first and second voltages, respectively. As the power selection circuit takes the first power voltage level as the input voltage, the power selection circuit outputs a first control signal; while the power selection circuit takes the second power voltage level as the input voltage, the power selection circuit outputs a second control signal. The switch circuit is coupled to the power selection circuit, the first reference circuit and the second reference circuit. As the switch circuit receives the first control signal, it outputs the first voltage; while the switch circuit receives the second control signal, it outputs the second voltage.

摘要翻译： 带隙参考电路，采用两个或多个电源作为用于输出参考电压的输入电源，包括第一参考电路，第二参考电路，功率选择电路和开关电路。 第一和第二参考电路分别接收用于产生第一和第二电压的两个相应的电源。 当功率选择电路将第一电源电压作为输入电压时，功率选择电路输出第一控制信号; 而功率选择电路将第二电源电压作为输入电压，则功率选择电路输出第二控制信号。 开关电路耦合到功率选择电路，第一参考电路和第二参考电路。 当开关电路接收到第一控制信号时，它输出第一电压; 当开关电路接收到第二控制信号时，它输出第二电压。