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公开(公告)号：US08754587B2
公开(公告)日：2014-06-17
申请号：US13381980
申请日：2010-06-29
CPC分类号： H02M3/335 , H02M1/4225 , H02M2001/007 , H05B33/0815 , Y02B70/126 , Y10T307/25
摘要： A power supply circuit has an LLC converter stage for converting a DC voltage input into a DC voltage output, and at least one hysteretic converter stage. Each hysteretic converter stage has a DC voltage input coupled to the DC voltage output of the LLC converter stage, and a DC current output. The LLC converter stage lacks a feedback control, and is operated at its load independent point. A ripple on the DC voltage output of the LLC converter does not affect the output current of the hysteretic converter stage. The stable DC current output of the hysteretic converter stage is coupled to a load having one or more LED strings.
摘要翻译： 电源电路具有用于将DC电压输入转换为DC电压输出的LLC转换器级和至少一个迟滞转换级。 每个迟滞转换器级具有耦合到LLC转换器级的DC电压输出的直流电压输入和直流电流输出。 LLC转换器级缺乏反馈控制，并且在其负载独立点运行。 LLC转换器的直流电压输出上的纹波不影响滞后转换器级的输出电流。 迟滞转换器级的稳定DC电流输出耦合到具有一个或多个LED串的负载。
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公开(公告)号：US08836225B2
公开(公告)日：2014-09-16
申请号：US13497533
申请日：2010-09-21
CPC分类号： H05B33/0815 , H05B33/0818 , Y02B20/346 , Y02B20/348
摘要： A dimmable LED driver circuit comprises a resonant DC-DC converter coupled to an output circuit. The converter comprises a half bridge or full bridge switching circuit coupled to a resonant circuit. An output of the resonant circuit is rectified and fed to the output circuit. The output circuit may comprise at least one LED series or shunt switch for switching an LED unit on and off. A control circuit controls the switches of the switching circuit at a variable switching frequency. The control circuit is also configured for controlling the switching circuit for amplitude modulating the converter and for pulse-width modulating the converter at a first pulse-width modulation frequency lower than the switching frequency. The control circuit is may further be configured for controlling the switching of the LED switch at a second pulse-width modulation frequency lower than the switching frequency.
摘要翻译： 可调光LED驱动器电路包括耦合到输出电路的谐振DC-DC转换器。 该转换器包括耦合到谐振电路的半桥或全桥开关电路。 谐振电路的输出被整流并馈送到输出电路。 输出电路可以包括用于切换LED单元的至少一个LED串联或分流开关。 控制电路以可变的开关频率来控制开关电路的开关。 控制电路还被配置为控制用于对转换器进行幅度调制的开关电路，并且以低于开关频率的第一脉冲宽度调制频率对转换器进行脉宽调制。 控制电路还可以被配置为在低于开关频率的第二脉冲宽度调制频率下控制LED开关的切换。
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公开(公告)号：US20120181940A1
公开(公告)日：2012-07-19
申请号：US13497533
申请日：2010-09-21
IPC分类号： H05B37/02
CPC分类号： H05B33/0815 , H05B33/0818 , Y02B20/346 , Y02B20/348
摘要： A dimmable LED driver circuit comprises a resonant DC-DC converter coupled to an output circuit. The converter comprises a half bridge or full bridge switching circuit coupled to a resonant circuit. An output of the resonant circuit is rectified and fed to the output circuit. The output circuit may comprise at least one LED series or shunt switch for switching an LED unit on and off. A control circuit controls the switches of the switching circuit at a variable switching frequency. The control circuit is also configured for controlling the switching circuit for amplitude modulating the converter and for pulse-width modulating the converter at a first pulse-width modulation frequency lower than the switching frequency. The control circuit is may further be configured for controlling the switching of the LED switch at a second pulse-width modulation frequency lower than the switching frequency.
摘要翻译： 可调光LED驱动器电路包括耦合到输出电路的谐振DC-DC转换器。 该转换器包括耦合到谐振电路的半桥或全桥开关电路。 谐振电路的输出被整流并馈送到输出电路。 输出电路可以包括用于切换LED单元的至少一个LED串联或分流开关。 控制电路以可变的开关频率来控制开关电路的开关。 控制电路还被配置为控制用于对转换器进行幅度调制的开关电路，并且以低于开关频率的第一脉冲宽度调制频率对转换器进行脉宽调制。 控制电路还可以被配置为在低于开关频率的第二脉冲宽度调制频率下控制LED开关的切换。
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公开(公告)号：US20120112657A1
公开(公告)日：2012-05-10
申请号：US13381980
申请日：2010-06-29
CPC分类号： H02M3/335 , H02M1/4225 , H02M2001/007 , H05B33/0815 , Y02B70/126 , Y10T307/25
摘要： A power supply circuit has an LLC converter stage for converting a DC voltage input into a DC voltage output, and at least one hysteretic converter stage. Each hysteretic converter stage has a DC voltage input coupled to the DC voltage output of the LLC converter stage, and a DC current output. The LLC converter stage lacks a feedback control, and is operated at its load independent point. A ripple on the DC voltage output of the LLC converter does not affect the output current of the hysteretic converter stage. The stable DC current output of the hysteretic converter stage is coupled to a load having one or more LED strings.
摘要翻译： 电源电路具有用于将DC电压输入转换为DC电压输出的LLC转换器级和至少一个迟滞转换级。 每个迟滞转换器级具有耦合到LLC转换器级的DC电压输出的直流电压输入和直流电流输出。 LLC转换器级缺乏反馈控制，并且在其负载独立点运行。 LLC转换器的直流电压输出上的纹波不影响滞后转换器级的输出电流。 迟滞转换器级的稳定DC电流输出耦合到具有一个或多个LED串的负载。
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5.发明申请DIMMING REGULATOR INCLUDING PROGRAMMABLE HYSTERETIC DOWN-CONVERTER FOR INCREASING DIMMING RESOLUTION OF SOLID STATE LIGHTING LOADS 审中-公开调节器包括可编程滞后转换器，用于增加固态照明负载的调光分辨率公开(公告)号：US20130038234A1
公开(公告)日：2013-02-14
申请号：US13642017
申请日：2011-04-22
IPC分类号： H05B37/02
CPC分类号： H05B33/0815 , G09G3/3406 , H05B33/083
摘要： A system providing deep dimming of a solid state lighting (SSL) load includes a hysteretic down-converter, a shunt switch, a controller and a comparator. The down-converter controls average current value and amplitude of ripple of SSL current using amplitude modulation (AM) dimming control. The shunt switch controls magnitude of the SSL current using pulse width modulation (PWM) dimming control. The controller generates first and second PWM signals for controlling upper and lower current levels at which the down-converter operates based on the SSL current and voltage across the SSL load, and generates a third PWM signal for controlling the shunt switch based on a dimming level load set by a dimmer. The comparator circuit compares first and second analog signals corresponding to the first and second PWM signals with the SSL current, and drives the down-converter in response to the comparison. The SSL current is based on both the AM dimming control and the PWM dimming control.
摘要翻译： 提供固态照明（SSL）负载的深度调光的系统包括滞后下变频器，分流开关，控制器和比较器。 下变频器使用调幅（AM）调光控制来控制SSL电流的平均电流值和纹波幅度。 分流开关使用脉冲宽度调制（PWM）调光控制来控制SSL电流的大小。 控制器产生第一和第二PWM信号，用于根据SSL负载上的SSL电流和电压控制下转换器工作的上限和下限电流水平，并产生第三个PWM信号，用于根据调光级别控制分流开关 负载由调光器设定。 比较器电路将与第一和第二PWM信号相对应的第一和第二模拟信号与SSL电流进行比较，并响应于比较驱动下变频器。 SSL电流基于AM调光控制和PWM调光控制。
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6.发明申请公开(公告)号：US20080278091A1
公开(公告)日：2008-11-13
申请号：US11570932
申请日：2005-06-29
IPC分类号： H05B41/16
CPC分类号： H05B41/2824 , H05B41/3927
摘要： A back light emitter (4) of a display apparatus is supplied with alternating current (AC) bursts. An emitted light representing signal is generated from the AC bursts as supplied to the light emitter (4). The emitted light representing signal is compared with a reference signal REF to provide an error signal. A duration of the AC bursts is adjusted dependent on the error signal, such as to minimize the error signal.
摘要翻译： 显示装置的背光发射器（4）被提供有交流（AC）脉冲串。 从提供给光发射器（4）的AC脉冲串产生发出的表示信号的光。 将发出的光表示信号与参考信号REF进行比较以提供误差信号。 根据误差信号调整AC脉冲串的持续时间，例如使误差信号最小化。
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公开(公告)号：US06717370B2
公开(公告)日：2004-04-06
申请号：US10225796
申请日：2002-08-22
IPC分类号： H05B3700
CPC分类号： H05B41/2851 , Y02B20/186
摘要： In an electronic ballast equipped with a high-frequency bridge circuit, a microprocessor for controlling lamp operation and a stop circuit for interrupting the operation of the ballast in case of a fault condition, the stop circuit interrupts both the operation of the bridge circuit and the operation of the microprocessor. Unstable operation of the ballast caused by the fault condition is prevented thereby.
摘要翻译： 在配备有高频桥接电路的电子镇流器中，用于控制灯操作的微处理器和用于在故障状态下中断镇流器的操作的停止电路，停止电路中断桥电路和 操作微处理器。 由此防止由故障状况引起的镇流器的不稳定的操作。
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公开(公告)号：US20100117543A1
公开(公告)日：2010-05-13
申请号：US12595646
申请日：2008-04-15
IPC分类号： H05B37/02
CPC分类号： H05B33/0872 , H05B33/0818
摘要： A lighting device (10) comprises a LED (4), a driver (3), and a controller (2) which regularly switches from a drive state to a measuring state and back. In the measuring state, the controller controls the driver such that the driver does not generate any LED current. The LED produces a measuring signal (Sm) indicating a measured light level. The controller processes the measuring signal received from the LED, and makes a decision on the desired light output of the LED. In the drive state, the controller controls the driver such that the average light output produced by the LED corresponds to the desired light output as determined in the measuring state. In a possible embodiment, the driver generates a nominal LED current INOM, and sets the duration (τ 1) of the drive state on the basis of the desired light output of the LED as determined in the measuring state.
摘要翻译： 照明装置（10）包括LED（4），驱动器（3）和控制器（2），其从驱动状态定期地切换到测量状态和返回。 在测量状态下，控制器控制驱动器，使得驱动器不产生任何LED电流。 LED产生指示测量的光电平的测量信号（Sm）。 控制器处理从LED接收到的测量信号，并决定LED的所需光输出。 在驱动状态下，控制器控制驱动器，使得由LED产生的平均光输出对应于在测量状态下确定的期望的光输出。 在可能的实施例中，驱动器产生标称LED电流INOM，并且基于在测量状态中确定的LED的期望光输出来设置驱动状态的持续时间（τ1）。
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公开(公告)号：US07652437B2
公开(公告)日：2010-01-26
申请号：US11570899
申请日：2005-06-23
IPC分类号： H05B41/36
CPC分类号： H05B41/295 , Y10S315/05
摘要： A drive circuit for driving a fluorescent tube lamp comprises a variable frequency oscillator generating a lamp drive frequency, a resonant drive circuit driving the lamp with the lamp drive frequency, and a control unit for driving the variable frequency of the latter under control of a synchronization signal. When a pre-heating frequency is generated by the variable frequency oscillator, the lamp is pre-heated while when an illumination drive frequency is generated, the lamp ignites and operates in its illuminated state. The control unit comprises a transition controller for at an ignition of the lamp limiting the drive frequency to an ultimate ignition frequency, and only enabling transition from the ultimate ignition frequency to the illumination drive frequency after an ignition delay time.
摘要翻译： 用于驱动荧光管灯的驱动电路包括产生灯驱动频率的可变频率振荡器，用灯驱动频率驱动灯的谐振驱动电路，以及用于在同步控制下驱动后者的可变频率的控制单元 信号。 当由可变频率振荡器产生预热频率时，灯被预热，而当产生照明驱动频率时，灯点亮并在其照亮状态下工作。 控制单元包括一个过渡控制器，用于点灯时将驱动频率限制在极限点火频率，并且仅在点火延迟时间之后能够从最终点火频率转换到照明驱动频率。
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公开(公告)号：US20080303454A1
公开(公告)日：2008-12-11
申请号：US11570899
申请日：2005-06-23
IPC分类号： H05B41/36
CPC分类号： H05B41/295 , Y10S315/05
摘要： A drive circuit for driving a fluorescent tube lamp comprises a variable frequency oscillator generating a lamp drive frequency, a resonant drive circuit driving the lamp with the lamp drive frequency, and a control unit for driving the variable frequency of the latter under control of a synchronization signal. When a pre-heating frequency is generated by the variable frequency oscillator, the lamp is pre-heated while when an illumination drive frequency is generated, the lamp ignites and operates in its illuminated state. The control unit comprises a transition controller for at an ignition of the lamp limiting the drive frequency to an ultimate ignition frequency, and only enabling transition from the ultimate ignition frequency to the illumination drive frequency after an ignition delay time.
摘要翻译： 用于驱动荧光管灯的驱动电路包括产生灯驱动频率的可变频率振荡器，用灯驱动频率驱动灯的谐振驱动电路，以及用于在同步控制下驱动后者的可变频率的控制单元 信号。 当由可变频率振荡器产生预热频率时，灯被预热，而当产生照明驱动频率时，灯点亮并在其照亮状态下工作。 控制单元包括一个过渡控制器，用于点灯时将驱动频率限制在极限点火频率，并且仅在点火延迟时间之后能够从最终点火频率转换到照明驱动频率。
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