公开(公告)号：US08294381B2

公开(公告)日：2012-10-23

申请号：US12860776

申请日：2010-08-20

申请人： Liangan Ge ,  Xiaoli Yao ,  Guichao Hua ,  Lijun Ren

发明人： Liangan Ge ,  Xiaoli Yao ,  Guichao Hua ,  Lijun Ren

IPC分类号： H05B37/02 ,  H05B41/36

CPC分类号： H05B33/0815

摘要： A PWM dimming circuit for a LED load including a LED load connected to the main LED drive circuit, a current loop configured to measure output current from the LED load, a current loop regulation circuit connected to the current loop, a main control circuit configured to receive a signal from the current loop when the LED load produces an output current, and a PWM dimming controller configured to provide a signal to control the current loop regulation circuit and to make the current loop operate in a closed-loop mode when the LED load produces the output current and to provide a shutdown signal to the main control circuit when the LED load does not produce the output current. When the output current is detected, the main control circuit controls the main LED drive circuit to set its output current at a predetermined load current.

摘要翻译： 一种用于LED负载的PWM调光电路，包括连接到主LED驱动电路的LED负载，被配置为测量来自LED负载的输出电流的电流回路，连接到电流回路的电流回路调节电路，主控制电路，被配置为 当LED负载产生输出电流时，接收来自电流回路的信号，并且PWM调光控制器被配置为提供信号以控制电流回路调节电路，并使电流回路在闭环模式下工作，当LED负载 产生输出电流，并且当LED负载不产生输出电流时，向主控制电路提供关断信号。 当检测到输出电流时，主控制电路控制主LED驱动电路以将其输出电流设定在预定的负载电流。

公开(公告)号：US20110080144A1

公开(公告)日：2011-04-07

申请号：US12896259

申请日：2010-10-01

申请人： Guichao Hua ,  Xiaoli Yao ,  Liangan GE ,  Lijun Ren

发明人： Guichao Hua ,  Xiaoli Yao ,  Liangan GE ,  Lijun Ren

IPC分类号： G05F1/70

CPC分类号： H02M1/4225 ,  H02J7/041 ,  H02J7/345 ,  H02M2001/0032 ,  Y02B40/90 ,  Y02B70/126 ,  Y02B70/16 ,  Y02P80/112

摘要： A circuit to improve the power factor of a power supply at light load, the circuit including a rectifier bridge, a filter positioned before or after the rectifier bridge, a logic control and power drive circuit, a switching transistor, a light load detecting circuit configured to output a control signal to the logic control and power drive circuit which controls the switching transistor to conduct when a heavy load is experienced and to cut off when a light load is experienced, in order to control the working status of the filter capacitor, and a power factor correction circuit.

摘要翻译： 一种提高轻载电源功率因数的电路，该电路包括整流桥，位于整流桥之前或之后的滤波器，逻辑控制和功率驱动电路，开关晶体管，轻载检测电路配置 向控制开关晶体管导通的逻辑控制和电力驱动电路输出控制信号，以便在经历轻负载时切断，以便控制滤波电容器的工作状态，以及 功率因数校正电路。

公开(公告)号：US08659919B2

公开(公告)日：2014-02-25

申请号：US12896259

申请日：2010-10-01

申请人： Guichao Hua ,  Xiaoli Yao ,  Liangan Ge ,  Lijun Ren

发明人： Guichao Hua ,  Xiaoli Yao ,  Liangan Ge ,  Lijun Ren

IPC分类号： H02M1/14 ,  H02M1/42

CPC分类号： H02M1/4225 ,  H02J7/041 ,  H02J7/345 ,  H02M2001/0032 ,  Y02B40/90 ,  Y02B70/126 ,  Y02B70/16 ,  Y02P80/112

摘要： A circuit to improve the power factor of a power supply at light load, the circuit including a rectifier bridge, a filter positioned before or after the rectifier bridge, a logic control and power drive circuit, a switching transistor, a light load detecting circuit configured to output a control signal to the logic control and power drive circuit which controls the switching transistor to conduct when a heavy load is experienced and to cut off when a light load is experienced, in order to control the working status of the filter capacitor, and a power factor correction circuit.

摘要翻译： 一种提高轻载电源功率因数的电路，该电路包括整流桥，位于整流桥之前或之后的滤波器，逻辑控制和功率驱动电路，开关晶体管，轻载检测电路配置 向控制开关晶体管导通的逻辑控制和电力驱动电路输出控制信号，以便在经历轻负载时切断，以便控制滤波电容器的工作状态，以及 功率因数校正电路。

公开(公告)号：US08552942B2

公开(公告)日：2013-10-08

申请号：US12831239

申请日：2010-07-06

申请人： Guichao Hua ,  Xinke Wu ,  Xiaoli Yao ,  Liangan Ge

发明人： Guichao Hua ,  Xinke Wu ,  Xiaoli Yao ,  Liangan Ge

IPC分类号： G09G3/32

CPC分类号： H05B33/0815 ,  H02M3/156 ,  H02M3/33507 ,  Y02B20/346 ,  Y02B20/347 ,  Y02B20/348 ,  Y02B20/383

摘要： A LED drive circuit for SCR dimming including an external controller configured to receive AC voltage from a power network to convert the AC voltage to an AC voltage with a lacked phase by phase controlling the voltage through a thyristor, and a LED driver that includes a bridge rectifier configured to shape the AC voltage with the lacked phase output into a unidirectional pulse DC voltage, and a phase angle detecting circuit configured to shape the AC voltage signal output with lacked phase from the external controller into a saw-tooth wave pulse signal.

摘要翻译： 一种用于SCR调光的LED驱动电路，包括外部控制器，该外部控制器被配置为从电力网络接收AC电压，通过相位控制通过晶闸管的电压将AC电压转换为具有缺相的AC电压;以及包括桥接器的LED驱动器 整流器被配置成将具有缺相输出的交流电压整形为单向脉冲直流电压;以及相位角检测电路，其被配置为将来自外部控制器的缺相输出的交流电压信号成形为锯齿波脉冲信号。

公开(公告)号：US08674621B2

公开(公告)日：2014-03-18

申请号：US12896445

申请日：2010-10-01

申请人： Liangan Ge ,  Guichao Hua ,  Xiaoli Yao ,  Xinke Wu

发明人： Liangan Ge ,  Guichao Hua ,  Xiaoli Yao ,  Xinke Wu

IPC分类号： H05B37/02 ,  H05B41/36

CPC分类号： H05B33/0812 ,  H05B33/0824 ,  Y02B20/345

摘要： A constant current control circuit with multiple outputs for a LED driver, the circuit including a single-output constant current power supply, and multiple output circuits, each output circuit comprising a current sharing circuit, a current sharing control circuit and a LED load. The LED load and the current sharing circuit are in series and form a series loop with a first terminal and a second terminal of the series loop connected to a first output terminal and a second output terminal of the constant current power supply.

摘要翻译： 一种用于LED驱动器的多个输出的恒定电流控制电路，包括单输出恒流电源的电路和多个输出电路，每个输出电路包括电流共享电路，电流共享控制电路和LED负载。 LED负载和电流共享电路串联并形成串联回路，其中串联回路的第一端子和第二端子连接到恒流电源的第一输出端子和第二输出端子。

公开(公告)号：US20110080102A1

公开(公告)日：2011-04-07

申请号：US12896346

申请日：2010-10-01

申请人： Liangan Ge ,  Xiaoli Yao ,  Guichao Hua

发明人： Liangan Ge ,  Xiaoli Yao ,  Guichao Hua

IPC分类号： H05B37/02

CPC分类号： H05B33/0815 ,  H05B33/0827 ,  Y02B20/348

摘要： The present invention discloses a high efficiency constant current LED driver, which comprises a rectification bridge, a PFC main circuit, an isolated DC/DC converter, a PFC controller and a PFC bus control circuit. Since the input voltage is an intermediate PFC bus voltage, which varies with the output voltage of the DC/DC converter. When the isolated DC/DC converter is an LLC resonant circuit, the operating frequency of the LLC circuit is close to the resonant frequency within a wide output voltage range. Thus, the gain range and the operating frequency is narrow, and can enable the constant current module to work with a high efficiency at a wide output voltage range. When the isolated DC/DC converter is a symmetric half bridge, or an asymmetric half bridge or a full bridge circuit, the duty cycle of DC/DC circuit is close to 50% within a wide output voltage range. Thus, the changing range of the duty cycle of the DC/DC converter will be narrow and can improve the efficiency dramatically.

摘要翻译： 本发明公开了一种高效率恒流LED驱动器，其包括整流桥，PFC主电路，隔离DC / DC转换器，PFC控制器和PFC总线控制电路。 由于输入电压是中间PFC总线电压，其随着DC / DC转换器的输出电压而变化。 当隔离的DC / DC转换器是LLC谐振电路时，LLC电路的工作频率接近于宽输出电压范围内的谐振频率。 因此，增益范围和工作频率窄，可以使恒流模块在宽输出电压范围内以高效率工作。 当隔离式DC / DC转换器为对称半桥，或非对称半桥或全桥电路时，DC / DC电路的占空比在宽输出电压范围内接近50％。 因此，DC / DC转换器的占空比的变化范围将变窄，并且可以显着提高效率。

公开(公告)号：US20110080115A1

公开(公告)日：2011-04-07

申请号：US12896445

申请日：2010-10-01

申请人： Liangan Ge ,  Guichao Hua ,  Xiaoli Yao ,  Xinke Wu

发明人： Liangan Ge ,  Guichao Hua ,  Xiaoli Yao ,  Xinke Wu

IPC分类号： H05B41/36

CPC分类号： H05B33/0812 ,  H05B33/0824 ,  Y02B20/345

摘要： A constant current control circuit with multiple outputs for a LED driver, the circuit including a single-output constant current power supply, and multiple output circuits, each output circuit comprising a current sharing circuit, a current sharing control circuit and a LED load. The LED load and the current sharing circuit are in series and form a series loop with a first terminal and a second terminal of the series loop connected to a first output terminal and a second output terminal of the constant current power supply.

摘要翻译： 一种用于LED驱动器的多个输出的恒定电流控制电路，包括单输出恒流电源的电路和多个输出电路，每个输出电路包括电流共享电路，电流共享控制电路和LED负载。 LED负载和电流共享电路串联并形成串联回路，其中串联回路的第一端子和第二端子连接到恒流电源的第一输出端子和第二输出端子。

公开(公告)号：US20110001766A1

公开(公告)日：2011-01-06

申请号：US12831239

申请日：2010-07-06

申请人： Guichao Hua ,  Xinke Wu ,  Xiaoli Yao ,  Liangan Ge

发明人： Guichao Hua ,  Xinke Wu ,  Xiaoli Yao ,  Liangan Ge

IPC分类号： G09G5/10

CPC分类号： H05B33/0815 ,  H02M3/156 ,  H02M3/33507 ,  Y02B20/346 ,  Y02B20/347 ,  Y02B20/348 ,  Y02B20/383

摘要： A LED drive circuit for SCR dimming including an external controller configured to receive AC voltage from a power network to convert the AC voltage to an AC voltage with a lacked phase by phase controlling the voltage through a thyristor, and a LED driver that includes a bridge rectifier configured to shape the AC voltage with the lacked phase output into a unidirectional pulse DC voltage, and a phase angle detecting circuit configured to shape the AC voltage signal output with lacked phase from the external controller into a saw-tooth wave pulse signal.

摘要翻译： 一种用于SCR调光的LED驱动电路，包括外部控制器，该外部控制器被配置为从电力网络接收AC电压，通过相位控制通过晶闸管的电压将AC电压转换为具有缺相的AC电压;以及包括桥接器的LED驱动器 整流器被配置成将具有缺相输出的交流电压整形为单向脉冲直流电压;以及相位角检测电路，其被配置为将来自外部控制器的缺相输出的交流电压信号成形为锯齿波脉冲信号。

公开(公告)号：US08866409B2

公开(公告)日：2014-10-21

申请号：US13700352

申请日：2010-11-10

申请人： Liang'an Ge ,  Xiaoli Yao ,  Guichao Hua ,  Lijun Ren

发明人： Liang'an Ge ,  Xiaoli Yao ,  Guichao Hua ,  Lijun Ren

IPC分类号： G05F1/00

CPC分类号： G05F1/10 ,  H05B33/0815 ,  H05B33/0827 ,  H05B37/02 ,  Y02B20/347

摘要： A constant-current Light Emitting Diode (LED) driver circuit is provided, and the circuit includes: an output voltage adjustable circuit and at least one path of LED load, wherein the output voltage adjustable circuit comprises: a switch converting main circuit, an output characteristic parameter sampling circuit, and an output voltage controller. The output voltage controller is used to adjust the output voltage of the switch converting main circuit according to the variation relationship between the sampling signal output by the output characteristic parameter sampling circuit and the output voltage, determine the adjustive direction of the output voltage magnitude of the switch converting main circuit according to the change of the sampling signal, adjust the magnitude of the output voltage of the switch converting main circuit according to the preset step, and finally make the output voltage equal to the voltage of one path of LED load with the highest voltage or the difference between the output voltage and the voltage of one path of LED load voltage with the highest voltage within the predetermined range. The present solution implements reducing the connection complexity and power dissipation on the base of controlling the multi-path constant-current LED.

摘要翻译： 提供恒流发光二极管（LED）驱动器电路，该电路包括：输出电压可调节电路和至少一个LED负载路径，其中输出电压可调电路包括：开关转换主电路，输出 特征参数采样电路和输出电压控制器。 输出电压控制器用于根据输出特性参数采样电路输出的采样信号与输出电压之间的变化关系来调节开关转换主电路的输出电压，确定输出电压幅度的调整方向 根据采样信号的变化开关转换主电路，根据预设步骤调整开关转换主电路的输出电压幅值，最后使输出电压等于LED负载的一路径电压 最高电压或输出电压与LED负载电压的一个路径的电压之间的差异，具有在预定范围内的最高电压。 本解决方案在控制多路恒流LED的基础上降低了连接复杂性和功耗。

公开(公告)号：US20130241433A1

公开(公告)日：2013-09-19

申请号：US13881294

申请日：2011-08-23

申请人： Liang'an Ge ,  Guichao Hua ,  Xiaoli Yao ,  Lijun Ren

发明人： Liang'an Ge ,  Guichao Hua ,  Xiaoli Yao ,  Lijun Ren

IPC分类号： H05B37/02

CPC分类号： H05B37/02 ,  H05B33/0815 ,  H05B33/0827 ,  H05B33/083 ,  H05B33/0866 ,  H05B37/0263 ,  Y02B20/346

摘要： Provided are a method, apparatus and system for controlling a light source. The method comprises: acquiring an adjustment signal and determining a dimming item according to the adjustment signal; the dimming item being composed of the value and/or value range of at least one characteristics parameter of a pulse drive signal; converting the adjustment signal into the pulse drive signal indicated by the dimming item; controlling an adjustment switch by means of the pulse drive signal, so as to output a voltage including a chopped wave voltage corresponding to the dimming item, thereby transmitting adjustment information about the colour and/or brightness of the light source by means of the voltage including the chopped wave voltage. The method, apparatus and system can achieve the function of adjusting the colour and/or brightness of the light source.

摘要翻译： 提供了一种用于控制光源的方法，装置和系统。 该方法包括：根据调整信号获取调整信号并确定调光项; 所述调光项目由脉冲驱动信号的至少一个特性参数的值和/或值范围组成; 将调整信号转换成由调光项目指示的脉冲驱动信号; 通过脉冲驱动信号控制调节开关，以输出包括对应于调光项目的斩波波电压的电压，从而通过包括电压的电压来发送关于光源的颜色和/或亮度的调整信息 斩波电压。 该方法，装置和系统可以实现调节光源的颜色和/或亮度的功能。