公开(公告)号：US08570772B2

公开(公告)日：2013-10-29

申请号：US13359447

申请日：2012-01-26

申请人： John D. Morris ,  Michael G. Negrete ,  Min Chen

发明人： John D. Morris ,  Michael G. Negrete ,  Min Chen

IPC分类号： H02M3/335

CPC分类号： H02M1/32 ,  H02M3/33584 ,  H02M3/33592 ,  H02M2001/0032 ,  Y02B70/1475 ,  Y02B70/16

摘要： A flyback converter uses primary side sensing to sense the output voltage for regulation feedback. Such sensing requires a predetermined minimum duty cycle even with very light load currents. Therefore, such a minimum duty cycle may create an over-voltage condition. In the flyback phase, after a minimum duty cycle of the power switch at light load currents, a synchronous rectifier turns off approximately when the current through the secondary winding falls to zero to create a discontinuous mode. If it is detected that there is an over-voltage, the synchronous rectifier is turned on for a brief interval to draw a reverse current through the secondary winding. When the synchronous rectifier shuts off, a current flows through the primary winding via a drain-body diode while the power switch is off. Therefore, excess power is transferred from the secondary side to the power source to reduce the over-voltage so is not wasted.

摘要翻译： 反激转换器使用初级侧感测来检测输出电压以进行调节反馈。 即使使用非常轻的负载电流，这种感测也需要预定的最小占空比。 因此，这样的最小占空比可能产生过电压状态。 在反激阶段，在轻负载电流下电源开关的最小占空比之后，当通过次级绕组的电流下降到零时，同步整流器大致关闭以产生不连续模式。 如果检测到存在过电压，则同步整流器接通短暂的间隔以通过次级绕组产生反向电流。 当同步整流器关闭时，电源开关关闭时，电流通过漏极体二极管流过初级绕组。 因此，多余的功率从次级侧传输到电源，以减少过电压，因此不会浪费。

公开(公告)号：US20130194836A1

公开(公告)日：2013-08-01

申请号：US13359447

申请日：2012-01-26

申请人： John D. Morris ,  Michael G. Negrete ,  Min Chen

发明人： John D. Morris ,  Michael G. Negrete ,  Min Chen

IPC分类号： H02M3/335

CPC分类号： H02M1/32 ,  H02M3/33584 ,  H02M3/33592 ,  H02M2001/0032 ,  Y02B70/1475 ,  Y02B70/16

摘要： A flyback converter uses primary side sensing to sense the output voltage for regulation feedback. Such sensing requires a predetermined minimum duty cycle even with very light load currents. Therefore, such a minimum duty cycle may create an over-voltage condition. In the flyback phase, after a minimum duty cycle of the power switch at light load currents, a synchronous rectifier turns off approximately when the current through the secondary winding falls to zero to create a discontinuous mode. If it is detected that there is an over-voltage, the synchronous rectifier is turned on for a brief interval to draw a reverse current through the secondary winding. When the synchronous rectifier shuts off, a current flows through the primary winding via a drain-body diode while the power switch is off. Therefore, excess power is transferred from the secondary side to the power source to reduce the over-voltage so is not wasted.

摘要翻译： 反激转换器使用初级侧感测来检测输出电压以进行调节反馈。 即使使用非常轻的负载电流，这种感测也需要预定的最小占空比。 因此，这样的最小占空比可能产生过电压状态。 在反激阶段，在轻负载电流下电源开关的最小占空比之后，当通过次级绕组的电流下降到零时，同步整流器大致关闭以产生不连续模式。 如果检测到存在过电压，则同步整流器接通短暂的间隔以通过次级绕组产生反向电流。 当同步整流器关闭时，电源开关关闭时，电流通过漏极体二极管流过初级绕组。 因此，多余的功率从次级侧传输到电源，以减少过电压，因此不会浪费。

公开(公告)号：US08873254B2

公开(公告)日：2014-10-28

申请号：US13418285

申请日：2012-03-12

申请人： John D. Morris ,  Michael G. Negrete ,  Min Chen

发明人： John D. Morris ,  Michael G. Negrete ,  Min Chen

IPC分类号： H02M3/335

CPC分类号： H02M3/335 ,  H02M2001/0032 ,  Y02B70/16

摘要： A flyback converter uses primary side sensing to sense the output voltage for regulation feedback. A comparator on the primary side detects whether the output voltage has exceeded a predetermined regulated voltage by a first threshold to detect an over-voltage condition, resulting from a current generated by the converter exceeding the load current. Triggering of the comparator causes the converter to enter a non-switching sleep mode, whereby the output voltage droops over a period of time. When the output voltage has drooped below the predetermined regulated voltage by a second threshold, a synchronous rectifier is controlled to turn on, then off, to generate a pulse in the primary winding. Upon detection of the pulse, the sleep mode is terminated, and normal operation resumes until a regulated voltage is achieved or until the first threshold is again exceeded by the output voltage.

摘要翻译： 反激转换器使用初级侧感测来检测输出电压以进行调节反馈。 初级侧的比较器检测输出电压是否超过预定的调节电压第一阈值，以检测由转换器产生的电流超过负载电流导致的过电压状况。 比较器的触发使得转换器进入非切换睡眠模式，由此输出电压在一段时间内下降。 当输出电压下降到低于预定调节电压第二阈值时，同步整流器被控制为接通，然后关断，以在初级绕组中产生脉冲。 当检测到脉冲时，停止睡眠模式，并且恢复正常操作，直到达到稳定电压或直到输出电压再次超过第一阈值为止。

公开(公告)号：US20130235620A1

公开(公告)日：2013-09-12

申请号：US13418285

申请日：2012-03-12

申请人： John D. Morris ,  Michael G. Negrete ,  Min Chen

发明人： John D. Morris ,  Michael G. Negrete ,  Min Chen

IPC分类号： H02M3/335

CPC分类号： H02M3/335 ,  H02M2001/0032 ,  Y02B70/16

摘要： A flyback converter uses primary side sensing to sense the output voltage for regulation feedback. A comparator on the primary side detects whether the output voltage has exceeded a predetermined regulated voltage by a first threshold to detect an over-voltage condition, resulting from a current generated by the converter exceeding the load current. Triggering of the comparator causes the converter to enter a non-switching sleep mode, whereby the output voltage droops over a period of time. When the output voltage has drooped below the predetermined regulated voltage by a second threshold, a synchronous rectifier is controlled to turn on, then off, to generate a pulse in the primary winding. Upon detection of the pulse, the sleep mode is terminated, and normal operation resumes until a regulated voltage is achieved or until the first threshold is again exceeded by the output voltage.

摘要翻译： 反激转换器使用初级侧感测来检测输出电压以进行调节反馈。 初级侧的比较器检测输出电压是否超过预定的调节电压第一阈值，以检测由转换器产生的电流超过负载电流导致的过电压状况。 比较器的触发使得转换器进入非切换睡眠模式，由此输出电压在一段时间内下降。 当输出电压下降到低于预定调节电压第二阈值时，同步整流器被控制为接通，然后关断，以在初级绕组中产生脉冲。 当检测到脉冲时，停止睡眠模式，并且恢复正常操作，直到达到稳定电压或直到输出电压再次超过第一阈值为止。

公开(公告)号：US20170240294A1

公开(公告)日：2017-08-24

申请号：US15504598

申请日：2015-04-13

申请人： Min Chen ,  ZHEJIANG UNIVERSITY ,  UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA ,  TUNGHAI UNIVERSITY

发明人： Hongsheng Chen ,  Zhaoyun Duan ,  Min Chen ,  Tsong-Shin Lim

IPC分类号： B64D45/08 ,  G01S17/89 ,  G01S7/499 ,  B64F1/18

CPC分类号： B64D45/08 ,  B64F1/18 ,  G01S1/70 ,  G01S5/16 ,  G01S7/499 ,  G01S17/89

摘要： A three-dimensional infrared laser aircraft landing-guiding system with high directivity is described. The system utilizes a highly penetrable and highly directional infrared laser source to generate an optical image via an optical image generating apparatus. The generated optical image involves the information for aircraft landing, and the information covers a large range of flying areas to make the optical image detectable for an aircraft. With the information provided by the optical image, the aircraft can be guided to the best landing path. The infrared laser source is highly directional and can emit a laser light to specific directions, reducing waste of energy, increasing navigation distances, and improving anti-jamming capability.

公开(公告)号：USD771964S1

公开(公告)日：2016-11-22

申请号：US29533160

申请日：2015-07-15

申请人： Min Chen

设计人： Min Chen

公开(公告)号：US09019727B2

公开(公告)日：2015-04-28

申请号：US13552360

申请日：2012-07-18

申请人： Min Chen ,  John David Morris ,  Michael George Negrete

发明人： Min Chen ,  John David Morris ,  Michael George Negrete

IPC分类号： H02M3/335 ,  H02M3/156

CPC分类号： H02M3/156 ,  H02M3/335

摘要： An isolated flyback converter having temperature compensation (TC) uses primary side sensing and an output diode, the output diode having a variable voltage drop related to its temperature. A feedback voltage VFB, proportional to the output voltage VOUT, in a feedback loop is compared to a fixed reference voltage VREF for setting a duty cycle of a power switch, wherein VFB is caused to approximately equal VREF. A TC circuit has a voltage source configured to generate a proportional-to-absolute-temperature voltage VPTAT, wherein VPTAT is at approximately VREF at a calibration temperature T0 and rises as a temperature exceeds T0. The voltage source is connected to the VFB node via a TC resistor RTC, so that at T0 no current flows through RTC. Therefore, the selection of the optimal RTC does not affect the selection of a scaling resistance for generating VFB. The current through RTC at elevated temperatures compensates VOUT.

摘要翻译： 具有温度补偿（TC）的隔离反激式转换器使用初级侧感测和输出二极管，输出二极管具有与其温度相关的可变电压降。 将与反馈回路中的输出电压VOUT成比例的反馈电压VFB与用于设定电源开关的占空比的固定参考电压VREF进行比较，其中使VFB大致相等于VREF。 TC电路具有被配置为产生比例绝对温度电压VPTAT的电压源，其中VPTAT在校准温度T0处大约为VREF，并且随着温度超过T0而升高。 电压源通过TC电阻RTC连接到VFB节点，使得在T0，没有电流流经RTC。 因此，最优RTC的选择不会影响生成VFB的缩放电阻的选择。 在高温下通过RTC的电流补偿了VOUT。

公开(公告)号：US08896955B1

公开(公告)日：2014-11-25

申请号：US13162095

申请日：2011-06-16

申请人： Min Chen ,  Alain Chahwan ,  Shang-Chen Wu ,  Qixing Zheng ,  Alexander Babinski ,  Duc T. Phan

发明人： Min Chen ,  Alain Chahwan ,  Shang-Chen Wu ,  Qixing Zheng ,  Alexander Babinski ,  Duc T. Phan

IPC分类号： G11B5/596

CPC分类号： G11B5/59622 ,  G11B5/59694

摘要： A disk drive comprises a track follow control system having a plurality of selectable frequency modes, the track follow control system configured to receive a position error signal and to output a control signal based on the position error signal, wherein the control signal is used by a head assembly to position a head over a disk. The disk drive also comprises a state estimator configured to receive the control signal and a position signal indicating a position of the head, to estimate a disturbance based on the control signal and the position signal, and to output an estimated disturbance signal based on the estimated disturbance. The disk drive further comprises a disturbance evaluator configured to receive the estimated disturbance signal, and to select one of the frequency modes of the track follow control system based on the estimated disturbance signal.

摘要翻译： 磁盘驱动器包括具有多个可选频率模式的轨道跟随控制系统，轨道跟随控制系统被配置为接收位置误差信号并基于位置误差信号输出控制信号，其中控制信号由 头部组件以将磁头定位在磁盘上。 磁盘驱动器还包括状态估计器，其被配置为接收控制信号和指示头部的位置的位置信号，以基于控制信号和位置信号来估计干扰，并且基于所估计的干扰信号来输出估计的干扰信号 骚乱。 磁盘驱动器还包括被配置为接收所估计的干扰信号的干扰评估器，并且基于估计的干扰信号选择轨道跟随控制系统的频率模式之一。

公开(公告)号：US20130329418A1

公开(公告)日：2013-12-12

申请号：US13492866

申请日：2012-06-10

申请人： Bishou Chen ,  Chungen Chen ,  Na Feng ,  Min Chen

发明人： Bishou Chen ,  Chungen Chen ,  Na Feng ,  Min Chen

IPC分类号： F21V9/10

CPC分类号： H05B33/0857 ,  F21K9/00 ,  F21Y2113/10 ,  F21Y2113/13 ,  F21Y2113/17 ,  F21Y2115/10

摘要： An LED (light emitting diode) lighting device with high color rendering index includes a plurality of LED luminous units, wherein one of the LED luminous units has (u′, v′) chromaticity coordinates defined on a 1976CIE chromaticity diagram, a distance between every two coordinate points is not less than 0.01, a distance between at least one of the coordinate points and any other coordinate point is not less than 0.1, and coordinates of at least one of the coordinate points meet a condition that 0.10≦u′≦0.45 and 0.30≦v′≦0.50. By selecting a variety of LEDs within a certain spectral range to mix light, the color rendering index of the LED lighting device with high color rendering index of the present invention can be improved, and simultaneously the cost of the light source can be controlled.

摘要翻译： 具有高显色指数的LED（发光二极管）照明装置包括多个LED发光单元，其中一个LED发光单元具有在1976CIE色度图上定义的（u'，v'）色度坐标，每个 两个坐标点不小于0.01，坐标点和任何其他坐标点中的至少一个之间的距离不小于0.1，并且至少一个坐标点的坐标满足0.10≤u≤0.45 和0.30 @ v'@ 0.50。 通过选择特定光谱范围内的各种LED来混合光，可以提高本发明的高显色指数的LED照明装置的显色指数，同时可以控制光源的成本。

公开(公告)号：US08514166B2

公开(公告)日：2013-08-20

申请号：US12129305

申请日：2008-05-29

申请人： Min Chen ,  Huajun Peng ,  Guoping Qiu ,  Chun Kit Hung ,  Wei Zhang

发明人： Min Chen ,  Huajun Peng ,  Guoping Qiu ,  Chun Kit Hung ,  Wei Zhang

IPC分类号： G09G3/36

CPC分类号： G09G3/3611 ,  G09G3/3406 ,  G09G2320/0646 ,  G09G2330/021 ,  G09G2360/16

摘要： A method of reducing power consumption in a liquid crystal display illuminated by a backlight device includes dimming the backlight and adjusting the intensity of the image to compensate for the dimmed backlight. A dimming factor for the backlight is based on a clipping point determining from the pixel intensity distribution of the image signal. The intensity of the image is adjusted based on the dimming factor, wherein a first tone mapping function is used to adjust pixel intensities below an intensity threshold and a second tone mapping function is used to adjust pixel intensities above the intensity threshold.

摘要翻译： 一种降低由背光装置照亮的液晶显示器中的功耗的方法包括使背光调光并调节图像的强度以补偿暗淡的背光。 用于背光的调光因子基于根据图像信号的像素强度分布确定的剪切点。 基于调光因子调整图像的强度，其中使用第一色调映射函数来调整低于强度阈值的像素强度，并且使用第二色调映射函数来调整高于强度阈值的像素强度。