公开(公告)号：US08004861B2

公开(公告)日：2011-08-23

申请号：US12425120

申请日：2009-04-16

申请人： Ming Xu ,  Bo Zhang ,  Kai Yao ,  Qiaoliang Chen

发明人： Ming Xu ,  Bo Zhang ,  Kai Yao ,  Qiaoliang Chen

IPC分类号： H02M3/335

CPC分类号： H02M1/4258 ,  Y02B70/126

摘要： The present invention discloses a parameter configuration method for elements of a PFC function converter. The converter has a PFC circuit modulating an input power into a DC modulated power and a transformer transforming the DC modulated power into an output power. The method of the present invention comprises a storage capacitor configuration procedure, a storage inductor configuration procedure and a verification procedure. The storage capacitor configuration procedure predetermines a test voltage and a rated bus voltage lower than the test voltage, determines a parameter of the storage capacitor according to the test voltage and uses the storage capacitor to supply the rated bus voltage. The storage inductor configuration procedure determines an inductance of a storage inductor to match the storage inductor and the primary coil of the transformer work in a discontinuous current mode. The verification procedure verifies whether the power factor of the converter exceeds 0.9.

摘要翻译： 本发明公开了一种PFC功能转换器元件的参数配置方法。 该转换器具有将输入功率调制成DC调制功率的PFC电路和将DC调制功率变换为输出功率的变压器。 本发明的方法包括存储电容器配置过程，存储电感器配置过程和验证过程。 存储电容器配置步骤预先确定测试电压和低于测试电压的额定总线电压，根据测试电压确定存储电容器的参数，并使用存储电容器提供额定总线电压。 存储电感器配置过程确定存储电感器与存储电感器和变压器的初级线圈匹配的电感以不连续电流模式工作。 验证程序验证转换器的功率因数是否超过0.9。

公开(公告)号：US08184455B2

公开(公告)日：2012-05-22

申请号：US12346356

申请日：2008-12-30

申请人： Qiaoliang Chen ,  Ming Xu ,  Yongjiang Bai

发明人： Qiaoliang Chen ,  Ming Xu ,  Yongjiang Bai

IPC分类号： H02M3/335 ,  H02M7/44 ,  G05F5/00 ,  H02M1/10

CPC分类号： H02M7/217 ,  H02M1/10 ,  H02M1/4225 ,  H02M2001/0032 ,  H02M2001/0045 ,  H02M2001/007 ,  Y02B70/126 ,  Y02B70/16

摘要： A power adapter to receive at least one AC input power and transform to DC primary output power includes a power factor correction circuit to receive the AC input power and modulate to become a modulated power, an isolation voltage step-down circuit connecting to the power factor correction circuit to modulate the modulated power to a modulated lower voltage power, a switch voltage regulation circuit connecting to the isolation voltage step-down circuit to receive the modulated lower voltage power, and a voltage stabilization circuit connecting to the switch voltage regulation circuit. The switch voltage regulation circuit sets a determined output level and regulates the modulated lower voltage power to become a determined power at the determined output level. The voltage stabilization circuit modulates the determined power to become the primary output power and supplies the primary output power to a primary output end.

摘要翻译： 用于接收至少一个AC输入功率并转换为DC初级输出功率的电源适配器包括用于接收AC输入功率并调制成为调制功率的功率因数校正电路，连接到功率因数的隔离电压降压电路 校正电路，用于将调制后的功率调制成调制的低电压电源;开关电压调节电路，连接到隔离电压降压电路以接收经调制的低电压电源;以及稳压电路，连接到开关稳压电路。 开关电压调节电路设置确定的输出电平并调节调制的较低电压功率以在确定的输出电平下变为确定的功率。 电压稳定电路将所确定的功率调制成主要输出功率，并将主输出功率提供给主输出端。

公开(公告)号：US20100181970A1

公开(公告)日：2010-07-22

申请号：US12356880

申请日：2009-01-21

申请人： Xu YANG ,  Yanping Yin ,  Ming Xu ,  Yongjiang Bai ,  Qiaoliang Chen

发明人： Xu YANG ,  Yanping Yin ,  Ming Xu ,  Yongjiang Bai ,  Qiaoliang Chen

IPC分类号： G05F1/10

CPC分类号： H02M3/1584

摘要： A phase shift control method for a boost converter and circuit implementation comprises a master phase and at least one slave phase. A master-phase inductor current flowing through the master phase has a master-phase charge time interval and a master-phase discharge time interval; a slave-phase inductor current flowing through the slave phase has a slave-phase charge time interval and a slave-phase discharge time interval. The method comprises: calculating an ideal switching timing whereat the slave-phase inductor current descends to a zero-current judgment value; obtaining a physical switching timing whereat the slave-phase charge time interval starts; calculating a conduction timing error between the physical switching timing and the ideal switching timing; determining the time length of the slave-phase charge time interval in the same cycle according to the conduction timing error and the master-phase charge time interval.

摘要翻译： 用于升压转换器和电路实现的相移控制方法包括主相和至少一个从相。 流经主相的主相电感电流具有主相充电时间间隔和主相放电时间间隔; 流过从相的从相电感电流具有从相充电时间间隔和从相放电时间间隔。 该方法包括：计算从相电感电流下降到零电流判断值的理想开关时序; 获得物理切换定时，其中从相充电时间间隔开始; 计算物理切换定时与理想切换定时之间的导通定时误差; 根据导通定时误差和主相充电时间间隔，确定相同周期中的从相充电时间间隔的时间长度。

公开(公告)号：US08072193B2

公开(公告)日：2011-12-06

申请号：US12356880

申请日：2009-01-21

申请人： Xu Yang ,  Yanping Yin ,  Ming Xu ,  Yongjiang Bai ,  Qiaoliang Chen

发明人： Xu Yang ,  Yanping Yin ,  Ming Xu ,  Yongjiang Bai ,  Qiaoliang Chen

IPC分类号： G05F1/61 ,  G05F1/614

CPC分类号： H02M3/1584

摘要： A phase shift control method for a boost converter and circuit implementation comprises a master phase and at least one slave phase. A master-phase inductor current flowing through the master phase has a master-phase charge time interval and a master-phase discharge time interval; a slave-phase inductor current flowing through the slave phase has a slave-phase charge time interval and a slave-phase discharge time interval. The method comprises: calculating an ideal switching timing whereat the slave-phase inductor current descends to a zero-current judgment value; obtaining a physical switching timing whereat the slave-phase charge time interval starts; calculating a conduction timing error between the physical switching timing and the ideal switching timing; determining the time length of the slave-phase charge time interval in the same cycle according to the conduction timing error and the master-phase charge time interval.

摘要翻译： 用于升压转换器和电路实现的相移控制方法包括主相和至少一个从相。 流经主相的主相电感电流具有主相充电时间间隔和主相放电时间间隔; 流过从相的从相电感电流具有从相充电时间间隔和从相放电时间间隔。 该方法包括：计算从相电感电流下降到零电流判断值的理想开关时序; 获得物理切换定时，其中从相充电时间间隔开始; 计算物理切换定时与理想切换定时之间的导通定时误差; 根据导通定时误差和主相充电时间间隔，确定相同周期中的从相充电时间间隔的时间长度。

公开(公告)号：US20100014326A1

公开(公告)日：2010-01-21

申请号：US12496025

申请日：2009-07-01

申请人： Linlin GU ,  Ming Xu ,  Xinbo Ruan ,  Kai Yao

发明人： Linlin GU ,  Ming Xu ,  Xinbo Ruan ,  Kai Yao

IPC分类号： H02M1/14

CPC分类号： H02M1/14 ,  H02M1/4225 ,  Y02B70/126 ,  Y02P80/112

摘要： A power factor correction (PFC) circuit includes an inductor, a diode, a storage capacitor, a switch and a control unit. The input power has a voltage fluctuation V1. The storage component absorbs a first voltage fluctuation and a switch regulation circuit absorbs a second voltage fluctuation V2. Thus output voltage from the PFC circuit is not a conventional constant voltage but a voltage of a great ripple. The PFC circuit further has a harmonic regulation unit. The harmonic regulation unit generates a voltage signal containing 3rd harmonic. The control unit receives a feedback signal and the voltage signal containing 3rd harmonic to generate a reference to the inductor current. Therefore, the inductor current contains 3rd harmonic. Thus power fluctuation absorbed and released by the capacitor is smaller. As a result energy storage capacitance can be reduced significantly.

摘要翻译： 功率因数校正（PFC）电路包括电感器，二极管，存储电容器，开关和控制单元。 输入功率具有电压波动V1。 存储组件吸收第一电压波动，开关调节电路吸收第二电压波动V2。 因此，来自PFC电路的输出电压不是常规的恒定电压，而是具有很大纹波的电压。 PFC电路还具有谐波调节单元。 谐波调节单元产生包含三次谐波的电压信号。 控制单元接收反馈信号和包含三次谐波的电压信号以产生对电感器电流的参考。 因此，电感电流包含三次谐波。 因此，由电容器吸收和释放的功率波动较小。 因此能够显着降低储能电容。

公开(公告)号：US08102165B2

公开(公告)日：2012-01-24

申请号：US12496025

申请日：2009-07-01

申请人： Linlin Gu ,  Ming Xu ,  Xinbo Ruan ,  Kai Yao

发明人： Linlin Gu ,  Ming Xu ,  Xinbo Ruan ,  Kai Yao

IPC分类号： G05F1/40 ,  G05F1/10 ,  G05F5/00

CPC分类号： H02M1/14 ,  H02M1/4225 ,  Y02B70/126 ,  Y02P80/112

摘要： A power factor correction (PFC) circuit includes an inductor, a diode, a storage capacitor, a switch and a control unit. The input power has a voltage fluctuation V1. The storage component absorbs a first voltage fluctuation and a switch regulation circuit absorbs a second voltage fluctuation V2. Thus output voltage from the PFC circuit is not a conventional constant voltage but a voltage of a great ripple. The PFC circuit further has a harmonic regulation unit. The harmonic regulation unit generates a voltage signal containing 3rd harmonic. The control unit receives a feedback signal and the voltage signal containing 3rd harmonic to generate a reference to the inductor current. Therefore, the inductor current contains 3rd harmonic. Thus power fluctuation absorbed and released by the capacitor is smaller. As a result energy storage capacitance can be reduced significantly.

摘要翻译： 功率因数校正（PFC）电路包括电感器，二极管，存储电容器，开关和控制单元。 输入功率具有电压波动V1。 存储部件吸收第一电压波动，开关调节电路吸收第二电压波动V2。 因此，来自PFC电路的输出电压不是常规的恒定电压，而是具有很大纹波的电压。 PFC电路还具有谐波调节单元。 谐波调节单元产生包含三次谐波的电压信号。 控制单元接收反馈信号和包含三次谐波的电压信号以产生对电感器电流的参考。 因此，电感电流包含三次谐波。 因此，由电容器吸收和释放的功率波动较小。 因此能够显着降低储能电容。

公开(公告)号：US08242703B2

公开(公告)日：2012-08-14

申请号：US12686333

申请日：2010-01-12

申请人： Beibei Wang ,  Xinbo Ruan ,  Ming Xu ,  Kai Yao

发明人： Beibei Wang ,  Xinbo Ruan ,  Ming Xu ,  Kai Yao

IPC分类号： H05B41/16

CPC分类号： H05B33/0815

摘要： A driving apparatus is provided and configured to suit driving at least a string of light emitting diodes (LEDs). The driving apparatus includes a flyback power factor correction (PFC) converter, a harmonics-filtering unit and a control unit. The flyback PFC converter works in an operation mode according to a pulse-width modulation (PWM) signal and receives an AC power so as to convert the AC power into a pulsating current. The harmonics-filtering unit is coupled to the flyback PFC converter and the string of LEDs, for receiving the pulsating current and filtering out the high-frequency harmonic components in the pulsating current so as to drive the string of LEDs. The control unit is coupled to the flyback PFC converter and the harmonics-filtering unit, for producing the PWM signal according to the AC power and the pulsating current, and reducing the peak-to-average ratio (PAR) of the pulsating current.

摘要翻译： 驱动装置被提供和配置为适合驱动至少一串发光二极管（LED）。 驱动装置包括反激式功率因数校正（PFC）转换器，谐波滤波单元和控制单元。 回扫PFC转换器根据脉宽调制（PWM）信号工作在运行模式，并接收交流电源，以将交流电转换为脉动电流。 谐波滤波单元耦合到回扫PFC转换器和LED串，用于接收脉动电流并滤除脉动电流中的高频谐波分量，以驱动LED串。 控制单元耦合到回扫PFC转换器和谐波滤波单元，用于根据AC功率和脉动电流产生PWM信号，并降低脉动电流的峰值平均比（PAR）。

公开(公告)号：US20110037414A1

公开(公告)日：2011-02-17

申请号：US12686333

申请日：2010-01-12

申请人： Beibei Wang ,  Xinbo Ruan ,  Ming Xu ,  Kai Yao

发明人： Beibei Wang ,  Xinbo Ruan ,  Ming Xu ,  Kai Yao

IPC分类号： H05B41/36

CPC分类号： H05B33/0815

摘要： A driving apparatus is provided and configured to suit driving at least a string of light emitting diodes (LEDs). The driving apparatus includes a flyback power factor correction (PFC) converter, a harmonics-filtering unit and a control unit. The flyback PFC converter works in an operation mode according to a pulse-width modulation (PWM) signal and receives an AC power so as to convert the AC power into a pulsating current. The harmonics-filtering unit is coupled to the flyback PFC converter and the string of LEDs, for receiving the pulsating current and filtering out the high-frequency harmonic components in the pulsating current so as to drive the string of LEDs. The control unit is coupled to the flyback PFC converter and the harmonics-filtering unit, for producing the PWM signal according to the AC power and the pulsating current, and reducing the peak-to-average ratio (PAR) of the pulsating current.

摘要翻译： 驱动装置被提供和配置为适合驱动至少一串发光二极管（LED）。 驱动装置包括反激式功率因数校正（PFC）转换器，谐波滤波单元和控制单元。 回扫PFC转换器根据脉宽调制（PWM）信号工作在运行模式，并接收交流电源，以将交流电转换为脉动电流。 谐波滤波单元耦合到回扫PFC转换器和LED串，用于接收脉动电流并滤除脉动电流中的高频谐波分量，以驱动LED串。 控制单元耦合到回扫PFC转换器和谐波滤波单元，用于根据AC功率和脉动电流产生PWM信号，并降低脉动电流的峰值平均比（PAR）。

公开(公告)号：US20210268820A1

公开(公告)日：2021-09-02

申请号：US17189686

申请日：2021-03-02

申请人： Ming Xu ,  Dimple Patel ,  Alexander Tokarev

发明人： Ming Xu ,  Dimple Patel ,  Alexander Tokarev

IPC分类号： B41M5/035

摘要： An image is formed on a transfer medium comprising a hydrophilic tackifier. Any portion of the image that is dimensionally insufficient to permanently adhere the image to the receiver substrate is determined, and a colorless liquid ink comprising water is applied to cover and surround the portion of the image that is dimensionally insufficient to permanently adhere the image to the receiver substrate. When heat is applied to the image to transfer the image layer to a receiver substrate, water in the image layer swells the image layer and the hydrophilic tackifier becomes sufficiently tacky to permanently adhere the image to the receiver substrate.

公开(公告)号：US09940879B2

公开(公告)日：2018-04-10

申请号：US13253739

申请日：2011-10-05

申请人： Shawn Robert Gettemy ,  Joshua Grey Wurzel ,  Jean-Pierre Simon Guillou ,  Ming Xu ,  David Andrew Doyle

发明人： Shawn Robert Gettemy ,  Joshua Grey Wurzel ,  Jean-Pierre Simon Guillou ,  Ming Xu ,  David Andrew Doyle

IPC分类号： G09G3/36 ,  G09G3/34

CPC分类号： G09G3/3406 ,  G09G2320/0646 ,  G09G2320/0666 ,  G09G2360/145

摘要： The present disclosure generally relates to systems and techniques for calibrating displays to improve the white point uniformity between similar type devices. In one embodiment, a backlight includes multiple strings of LEDs, where each string is driven by a separate driver, or driver channel. Each string may be separately tested at a base current to determine its emitted chromaticity, and values indicative of the emitted chromaticities may be stored within the backlight as calibration values. The calibration values may then be used to determine the driving strength for each string that allows the display to produce the target white point when the light from the strings is mixed. Further, in certain embodiments, adjustments also may be made to the LCD panel based on the emitted chromaticities at the base current.