公开(公告)号：US08598792B2

公开(公告)日：2013-12-03

申请号：US13371375

申请日：2012-02-10

申请人： Zhimou Ren ,  Ching-Chuan Kuo ,  Tiesheng Yan ,  Yunning Xie ,  Jun Ren

发明人： Zhimou Ren ,  Ching-Chuan Kuo ,  Tiesheng Yan ,  Yunning Xie ,  Jun Ren

IPC分类号： H03K19/086

CPC分类号： H05B33/0815

摘要： Embodiments of the invention provided a driving circuit for powering a light-emitting diode (LED) light source. The driving circuit includes a rectifier, a filter capacitor, and a control circuit. The rectifier converts an AC voltage from an AC power source to a rectified AC voltage. The filter capacitor coupled to the rectifier filters the rectified AC voltage to provide a DC voltage. The control circuit controls power supplied to the LED light source. The control circuit enables a discharging current periodically to discharge the filter capacitor if a switch coupled between an AC power source and a rectifier is turned off and disables the discharging current if the control circuit determines that the switch is turned on.

摘要翻译： 本发明的实施例提供了一种用于为发光二极管（LED）光源供电的驱动电路。 驱动电路包括整流器，滤波电容器和控制电路。 整流器将AC电压从AC电源转换为整流的AC电压。 耦合到整流器的滤波电容器对整流的AC电压进行滤波以提供DC电压。 控制电路控制提供给LED光源的电力。 如果连接在AC电源和整流器之间的开关被断开并且如果控制电路确定开关导通而禁止放电电流，则控制电路使能放电电流周期性地对滤波电容器放电。

公开(公告)号：US08866398B2

公开(公告)日：2014-10-21

申请号：US13608273

申请日：2012-09-10

申请人： Zhimou Ren ,  Yunning Xie ,  Jun Ren ,  Ching-Chuan Kuo

发明人： Zhimou Ren ,  Yunning Xie ,  Jun Ren ,  Ching-Chuan Kuo

IPC分类号： H05B37/02

CPC分类号： H05B33/0815 ,  H02M1/4258 ,  Y02B70/126

摘要： A controller for controlling a power converter includes a signal generator and a driver. The power converter receives an input voltage and provides an output voltage to power a load. The signal generator receives a sense signal indicating a current flowing through the power converter, receives a detection signal indicating whether the power converter operates in a predetermined state, and generates a square wave signal according to the sense signal and the detection signal. The square wave signal has a first voltage level proportional to a peak level of the current when the power converter operates in the predetermined state; otherwise, the square wave signal has a second voltage level. The driver generates a driving signal based on the square wave signal to control a current flowing through the load.

摘要翻译： 用于控制功率转换器的控制器包括信号发生器和驱动器。 功率转换器接收输入电压并提供输出电压来为负载供电。 信号发生器接收指示流过功率转换器的电流的感测信号，接收指示功率转换器是否以预定状态工作的检测信号，并根据感测信号和检测信号产生方波信号。 当功率转换器在预定状态下工作时，方波信号具有与电流的峰值电平成比例的第一电压电平; 否则，方波信号具有第二电压电平。 驱动器基于方波信号产生驱动信号，以控制流过负载的电流。

公开(公告)号：US08183787B2

公开(公告)日：2012-05-22

申请号：US12718210

申请日：2010-03-05

申请人： Zhimou Ren ,  Jun Ren ,  Yunning Xie ,  Tiesheng Yan ,  Feng Lin

发明人： Zhimou Ren ,  Jun Ren ,  Yunning Xie ,  Tiesheng Yan ,  Feng Lin

IPC分类号： H05B41/36 ,  H05B41/14

CPC分类号： H05B33/0884 ,  H05B33/0815 ,  H05B33/0851 ,  Y02B20/346

摘要： A power supply system includes a power converter, a switch, and a controller. The power converter is operable for providing power to a load. The switch is coupled to the power converter and is operable for adjusting the power to the load. The switch has a gate, a source and a drain. The controller is coupled to the switch and is operable for controlling a state of the switch. The controller has a first control terminal for providing a gate voltage to the gate of the switch, a second control terminal for providing a source voltage to the source of the switch, and an input terminal for receiving a supply voltage via the source of the switch. The controller is also operable for limiting the supply voltage within a predetermined maximum level by regulating the gate voltage to a preset level.

摘要翻译： 电源系统包括功率转换器，开关和控制器。 功率转换器可操作以向负载提供电力。 开关耦合到功率转换器，并且可操作用于调节负载的功率。 开关有一个门，一个源和一个漏极。 控制器耦合到开关并且可操作用于控制开关的状态。 控制器具有用于向开关的栅极提供栅极电压的第一控制端子，用于向开关源提供源极电压的第二控制端子以及用于经由开关源接收电源电压的输入端子 。 控制器还可操作用于通过将栅极电压调节到预设电平来将电源电压限制在预定最大电平内。

公开(公告)号：US09209702B2

公开(公告)日：2015-12-08

申请号：US13659195

申请日：2012-10-24

申请人： Zhimou Ren ,  Yunning Xie ,  Jun Ren ,  Tiesheng Yan

发明人： Zhimou Ren ,  Yunning Xie ,  Jun Ren ,  Tiesheng Yan

IPC分类号： H02M3/335 ,  H02M1/00

CPC分类号： H02M3/33553 ,  H02M2001/0035 ,  Y02B70/16

摘要： A flyback converter includes a transformer and a controller operable for controlling a switch coupled in series with a primary winding of the transformer. The controller is configured to operate in multiple modes including a burst mode and a standby mode. In the burst mode, the controller generates a first plurality of discrete pulse groups to turn on the switch and a duration of each pulse in the first plurality of discrete pulse groups is determined by a first reference signal having a first predetermined voltage. In the standby mode, the controller generates a second plurality of discrete pulse groups to turn on the switch and a duration of each pulse in the second plurality of discrete pulse groups is determined by a second reference signal having a second predetermined voltage which is greater than the first predetermined voltage of the first reference signal.

摘要翻译： 反激式转换器包括变压器和控制器，其可操作用于控制与变压器的初级绕组串联耦合的开关。 控制器配置为在多种模式下工作，包括突发模式和待机模式。 在突发模式中，控制器产生第一多个离散脉冲组以接通开关，并且第一多个离散脉冲组中的每个脉冲的持续时间由具有第一预定电压的第一参考信号确定。 在待机模式下，控制器产生第二多个离散脉冲组以接通开关，并且第二多个离散脉冲组中的每个脉冲的持续时间由具有大于第二多个离散脉冲组的第二预定电压的第二参考信号确定 第一参考信号的第一预定电压。

公开(公告)号：US08379413B2

公开(公告)日：2013-02-19

申请号：US12712407

申请日：2010-02-25

申请人： Zhimou Ren ,  Jun Ren ,  Yunning Xie

发明人： Zhimou Ren ,  Jun Ren ,  Yunning Xie

IPC分类号： H02M3/335

CPC分类号： H02M3/33507

摘要： A power converter includes a transformer operated in multiple switching cycles. At least one switching cycle includes a charging period, a discharging period, and an adjusting period. The transformer has a primary winding coupled to a power source and a secondary winding coupled to a load. During the charging period the transformer is powered by the power source and a current flowing through the primary winding increases. During the discharging period the transformer discharges to power the load and a current flowing through the secondary winding decreases. A ratio of a duration of the discharging period to a total duration of the charging period, the discharging period and the adjusting period is constant.

摘要翻译： 功率转换器包括在多个开关周期中工作的变压器。 至少一个开关周期包括充电周期，放电周期和调整周期。 变压器具有耦合到电源的初级绕组和耦合到负载的次级绕组。 在充电期间，变压器由电源供电，流过初级绕组的电流增加。 在放电期间，变压器放电给负载供电，流过次级绕组的电流减小。 放电期间的持续时间与充电期间的总持续时间，放电期间和调整期间的比率恒定。

公开(公告)号：US08169160B2

公开(公告)日：2012-05-01

申请号：US12967933

申请日：2010-12-14

申请人： Tiesheng Yan ,  Ching-Chuan Kuo ,  Zhimou Ren ,  Jun Ren

发明人： Tiesheng Yan ,  Ching-Chuan Kuo ,  Zhimou Ren ,  Jun Ren

IPC分类号： H05B37/02 ,  H05B39/04 ,  H05B41/36 ,  H05B37/00 ,  H05B39/00 ,  H05B41/00

CPC分类号： H05B33/0815

摘要： A circuit for driving a light source, e.g., an LED light source, includes a converter, a sensor, and a controller. The converter converts an input voltage to an output voltage across the LED light source based upon a driving signal. A duty cycle of the driving signal determines an average current flowing through the LED light source. The sensor is selectively coupled to and decoupled from the converter based upon the driving signal. The sensor generates a sense voltage indicative of a current flowing through the LED light source when the sensor is coupled to the converter. The controller is coupled to the converter and sensor. The controller compares the sense voltage to a reference voltage indicative of a predetermined average current through the LED light source to generate a compensation signal and generates the driving signal based upon the compensation signal. The duty cycle of the driving signal is adjusted based upon the compensation signal to adjust the average current flowing through the LED light source to the predetermined average current.

摘要翻译： 用于驱动例如LED光源的光源的电路包括转换器，传感器和控制器。 转换器基于驱动信号将输入电压转换成LED光源两端的输出电压。 驱动信号的占空比确定流过LED光源的平均电流。 基于驱动信号，传感器选择性地耦合到转换器并从转换器去耦。 当传感器耦合到转换器时，传感器产生指示流过LED光源的电流的感测电压。 控制器耦合到转换器和传感器。 控制器将感测电压与表示通过LED光源的预定平均电流的参考电压进行比较，以产生补偿信号，并基于补偿信号产生驱动信号。 基于补偿信号调整驱动信号的占空比，以将流过LED光源的平均电流调整到预定的平均电流。

公开(公告)号：US08324832B2

公开(公告)日：2012-12-04

申请号：US12823269

申请日：2010-06-25

申请人： Tiesheng Yan ,  Zhimou Ren ,  Jun Ren ,  Ching-Chuan Kuo

发明人： Tiesheng Yan ,  Zhimou Ren ,  Jun Ren ,  Ching-Chuan Kuo

IPC分类号： H05B37/02

CPC分类号： H05B33/0815 ,  H05B33/0821 ,  H05B33/0842 ,  Y02B20/347

摘要： A driving circuit for driving a light source includes a power converter, a controller and a voltage-controlled current source. The power converter is coupled to the light source, and receives an input voltage from a power source and provides an output voltage to the light source. The power converter includes a switch coupled in series with the light source. The controller is coupled to the power converter and controls a power of the light source by controlling the switch. The voltage-controlled current source is coupled to the controller and provides a first current. The controller controls the switch based on the first current.

摘要翻译： 用于驱动光源的驱动电路包括功率转换器，控制器和压控电流源。 功率转换器耦合到光源，并且从电源接收输入电压并向光源提供输出电压。 功率转换器包括与光源串联耦合的开关。 控制器耦合到功率转换器，并通过控制开关来控制光源的功率。 电压控制电流源耦合到控制器并提供第一电流。 控制器根据第一个电流控制开关。

公开(公告)号：US20070015826A1

公开(公告)日：2007-01-18

申请号：US11476287

申请日：2006-06-28

申请人： Nair Sreejayan ,  Jun Ren ,  Xiaoping Yang

发明人： Nair Sreejayan ,  Jun Ren ,  Xiaoping Yang

IPC分类号： A61K31/28 ,  C07F11/00

CPC分类号： C07C229/76

摘要： Compositions comprising chromium (III) 1:3 complexes comprising amino acids and methods of use thereof are provided.

公开(公告)号：US20080122921A1

公开(公告)日：2008-05-29

申请号：US11944178

申请日：2007-11-21

申请人： Jun Ren

发明人： Jun Ren

IPC分类号： H04N7/14

CPC分类号： H04N19/127 ,  H04L1/0089 ,  H04N19/159 ,  H04N19/164 ,  H04N19/166 ,  H04N19/172 ,  H04N19/46 ,  H04N19/61 ,  H04N19/67 ,  H04N19/89

摘要： The present invention discloses a method and an apparatus of wireless video transceiving based on a multi-carrier technique. The method comprises the following steps: image information in a video GOP are separated and a sequential relationship between individual image information is recorded; general image information and important image information are treated discriminatingly in a video transmission process according to the degree of importance of different image information, in order to improve a transmission quality of the important image information; after the image information is received by a receiving end, the image information is recombined into the video GOP according to the sequential relationship. In the present invention, the important image information and non-important image information are treated discriminatingly via a sub-carrier allocation and a selection of different transmitting conditions in order to enhance the transmission quality of important image information in terms of improving the transmitting condition, so that the transmission quality of the wireless video is guaranteed.

摘要翻译： 本发明公开了一种基于多载波技术的无线视频收发方法和装置。 该方法包括以下步骤：视频GOP中的图像信息被分离，并且记录各个图像信息之间的顺序关系; 为了提高重要图像信息的传输质量，根据不同图像信息的重要程度，在视频传输处理中对一般图像信息和重要图像信息进行辨别处理; 在由接收端接收到图像信息之后，根据顺序关系将图像信息重新组合成视频GOP。 在本发明中，通过副载波分配和不同发送条件的选择来辨别重要的图像信息和非重要的图像信息，以提高重要的图像信息的传输质量， 使得无线视频的传输质量得到保证。

公开(公告)号：US08350890B2

公开(公告)日：2013-01-08

申请号：US11944178

申请日：2007-11-21

申请人： Jun Ren

发明人： Jun Ren

IPC分类号： H04N7/14

CPC分类号： H04N19/127 ,  H04L1/0089 ,  H04N19/159 ,  H04N19/164 ,  H04N19/166 ,  H04N19/172 ,  H04N19/46 ,  H04N19/61 ,  H04N19/67 ,  H04N19/89

摘要： The present invention discloses a method and an apparatus of wireless video transceiving based on a multi-carrier technique. The method comprises the following steps: image information in a video GOP are separated and a sequential relationship between individual image information is recorded; general image information and important image information are treated discriminatingly in a video transmission process according to the degree of importance of different image information, in order to improve a transmission quality of the important image information; after the image information is received by a receiving end, the image information is recombined into the video GOP according to the sequential relationship. In the present invention, the important image information and non-important image information are treated discriminatingly via a sub-carrier allocation and a selection of different transmitting conditions in order to enhance the transmission quality of important image information in terms of improving the transmitting condition, so that the transmission quality of the wireless video is guaranteed.

摘要翻译： 本发明公开了一种基于多载波技术的无线视频收发方法和装置。 该方法包括以下步骤：视频GOP中的图像信息被分离，并且记录各个图像信息之间的顺序关系; 为了提高重要图像信息的传输质量，根据不同图像信息的重要程度，在视频传输处理中对一般图像信息和重要图像信息进行辨别处理; 在由接收端接收到图像信息之后，根据顺序关系将图像信息重新组合成视频GOP。 在本发明中，通过副载波分配和不同发送条件的选择来辨别重要的图像信息和非重要的图像信息，以提高重要的图像信息在传输条件方面的传输质量， 使得无线视频的传输质量得到保证。