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11.发明授权Method for dimming a light generatng system for generating light with a variable color 失效用于调光用于产生具有可变颜色的光的光发生系统的方法公开(公告)号：US08084948B2
公开(公告)日：2011-12-27
申请号：US12296942
申请日：2007-04-04
CPC分类号： H05B41/3921
摘要： A method for dimming an illumination system (20) capable of emitting light (L) with a variable color is described. The illumination system (20) comprises three dimmable light sources (21, 22, 23) generating respective lights (L1, L2, L3) having respective, mutually different colors (C1, C2, C3). The method comprises the step of reducing the light intensities (I1, I2, I3) of the three dimmable light sources (21, 22, 23) while maintaining the color point until one of said light sources (21) reaches a lower dim limit (IMIN)—The method further comprises the step of maintaining the light intensity (I1) of said one light source (21) at its lower dim limit (IMIN) and reducing the light intensities (I2, I3) of the two other dimmable light sources (22, 23) in such a manner that the hue is maintained.
摘要翻译： 描述了一种用于调光能够以可变颜色发光的照明系统（20）的方法。 照明系统（20）包括三个可调光源（21,22,23），其产生具有相应不同颜色（C1，C2，C3）的相应光（L1，L2，L3）。 该方法包括降低三个可调光光源（21,22,23）的光强度（I1，I2，I3）同时保持色点，直到所述光源（21）中的一个达到较低的暗限 IMIN） - 该方法还包括将所述一个光源（21）的光强度（I1）保持在其较低暗限（IMIN）并降低两个其它可调光源的光强度（I2，I3）的步骤 （22,23），以保持色调。
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公开(公告)号：US07429830B2
公开(公告)日：2008-09-30
申请号：US11573900
申请日：2005-07-27
IPC分类号： H05B37/02
CPC分类号： H05B41/285 , H05B41/282 , Y02B20/183
摘要： A fluorescent lamp (2), in particular a backlight lamp of a display device, is supplied with an alternating voltage, a frequency and an amplitude of which being greater during ignition than during normal operation of the lamp. The voltage (V) across the lamp and the current (I) through the lamp are measured to provide a measured voltage value and a measured real lamp current value. From the alternating voltage there is derived a voltage (V2). The measured voltage value is multiplied by the sum of the measured real lamp current value and the derived voltage. The multiplication result (P=V*(I+V2)) is compared with a reference value (Ref), which results in a difference or error value. The error value is used to control the frequency and the amplitude of the alternating voltage (V), such that the error value is minimized.
摘要翻译： 荧光灯（2），特别是显示装置的背光灯被提供有在点火期间比在灯的正常操作期间更大的交流电压，频率和振幅。 测量灯上的电压（V）和通过灯的电流（I），以提供测量的电压值和测得的实际灯电流值。 从交流电压导出电压（V 2）。 测得的电压值乘以测得的实际灯电流值与导出电压之和。 将乘法结果（P = V *（I + V 2））与参考值（Ref）进行比较，这导致差值或误差值。 误差值用于控制交流电压（V）的频率和幅度，使得误差值最小化。
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13.发明申请Method For Lamp Life Control of a Gas Discharge Lamp, a Gas Discharge Lamp Driver Circuit, a Gas Discharge Lamp and an Assembly of a Gas Discharge Lamp and a Lamp Driver Circuit 审中-公开气体放电灯的灯寿命控制方法，气体放电灯驱动电路，气体放电灯和气体放电灯的组装和灯驱动电路公开(公告)号：US20080185968A1
公开(公告)日：2008-08-07
申请号：US11910017
申请日：2006-03-27
申请人： Josephus Johannes De Groot , Lars Rene Christian Waumans , Geert Willem Van Der Veen , Theodoor Hubert Stommen
发明人： Josephus Johannes De Groot , Lars Rene Christian Waumans , Geert Willem Van Der Veen , Theodoor Hubert Stommen
IPC分类号： H05B41/36
CPC分类号： H05B41/2988 , H05B41/295
摘要： The lamp life of a gas discharge lamp (6) depends inter alia on the deterioration of an electrode of the lamp during operation. The deterioration depends on an operating temperature of the electrode. A method according to the present invention for controlling the lamp life includes controlling the electrode temperature during operation by generating a temperature signal (12) representing the electrode temperature and providing said signal to a lamp driver circuit (4) operating said lamp. The lamp driver circuit controls an operating signal (10) supplied to the lamp (6) in order to control the electrode temperature to lie within a predetermined temperature range, thereby minimizing damage to the electrode during operation.
摘要翻译： 气体放电灯（6）的灯寿命尤其依赖于在操作期间灯的电极的劣化。 劣化取决于电极的工作温度。 根据本发明的用于控制灯寿命的方法包括通过产生表示电极温度的温度信号（12）来控制操作期间的电极温度，并且向操作所述灯的灯驱动电路（4）提供所述信号。 灯驱动器电路控制提供给灯（6）的操作信号（10），以便将电极温度控制在预定温度范围内，从而最小化操作期间电极的损坏。
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公开(公告)号：US06909245B2
公开(公告)日：2005-06-21
申请号：US10280647
申请日：2002-10-25
IPC分类号： H05B41/24 , H05B41/00 , H05B41/285 , H05B37/02
CPC分类号： H05B41/2853
摘要： A ballast circuit for operating a discharge lamp equipped with a control loop for controlling the power consumed by the lamp. A first circuit part is coupled to the discharge lamp and to input terminals for connection to a source of supply voltage for the ballast circuit. The first circuit part is coupled to the input terminals to supply lamp current from the supply voltage. The control loop includes a second circuit part coupled to the first circuit to generate a first signal that represents a desired value of lamp power. A third circuit part is coupled to the input terminals for generating a second signal that depends on the amplitude of the supply voltage. A fourth circuit part has an input coupled to the third circuit part and an output coupled to an input of the second circuit part for adjusting the value of the first signal dependent upon the second signal. The power consumed by the lamp is decreased when the amplitude of the supply voltage decreases. Too high currents in the ballast circuit are thereby prevented.
摘要翻译： 一种镇流器电路，用于操作配备有用于控制灯消耗的功率的控制回路的放电灯。 第一电路部分耦合到放电灯和用于连接到镇流器电路的电源电压源的输入端子。 第一电路部分耦合到输入端以从电源电压提供灯电流。 控制回路包括耦合到第一电路的第二电路部分，以产生表示灯功率的期望值的第一信号。 第三电路部分耦合到输入端，用于产生取决于电源电压的幅度的第二信号。 第四电路部分具有耦合到第三电路部分的输入和耦合到第二电路部分的输入的输出，用于根据第二信号调整第一信号的值。 当电源电压的幅度降低时，灯消耗的功率降低。 从而防止了镇流器电路中的过大的电流。
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公开(公告)号：US06392361B1
公开(公告)日：2002-05-21
申请号：US09778893
申请日：2001-02-07
IPC分类号： H05B3702
摘要： In a ballast circuit for operating a lamp, which comprises a bridge circuit and a control circuit for controlling the bridge switches, the control circuit comprises a microprocessor. The control signal for controlling the switches is generated by a separate circuit comprising a signal generator, a timer, two comparators and two reference signal generators. The microprocessor is used only to set the reference signals to the desired values, thereby dimming the lamp.
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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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公开(公告)号：US07990076B2
公开(公告)日：2011-08-02
申请号：US12439697
申请日：2007-09-04
IPC分类号： H05B37/02
CPC分类号： H05B41/3925
摘要： A lamp driver circuit (400) comprises a feedback circuit for controlling stable operation of a discharge lamp (La), e.g. an inductively coupled discharge lamp such as a molecular radiation lamp, and for controlling a light output level of the discharge lamp (La). In particular, if the discharge lamp (La) is operated at a dimmed light output level, the light output is sensitive to changes in the lamp voltage (VLa), possibly resulting in flickering. In order to control stable lamp operation and prevent flickering, a high-sp feedback circuit is provided for controlling an operating frequency. In order to provide a relatively large dimming range for controlling the light output level, a low-speed feedback circuit is provided for controlling a DC supply voltage level (VDC).
摘要翻译： 灯驱动器电路（400）包括用于控制放电灯（La）的稳定操作的反馈电路，例如， 诸如分子辐射灯的电感耦合放电灯，并用于控制放电灯（La）的光输出电平。 特别地，如果放电灯（La）以暗淡的光输出电平工作，则光输出对灯电压（VLa）的变化敏感，可能导致闪烁。 为了控制稳定的灯操作并防止闪烁，提供了用于控制工作频率的高反馈电路。 为了提供用于控制光输出电平的相对较大的调光范围，提供了用于控制DC电源电压电平（VDC）的低速反馈电路。
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公开(公告)号：US20110148315A1
公开(公告)日：2011-06-23
申请号：US13060703
申请日：2009-08-28
IPC分类号： H05B37/02
CPC分类号： H05B33/0869 , H05B33/0818
摘要： A lighting device (1) comprises a plurality of LEDs (11-14) producing light (21-24) of mutually different colors. The LEDs are driven in switching cycles (63) with a duty cycle controlled supply current of constant magnitude. In each switching cycle, each LED is first switched ON (61) and then switched OFF (62).In a measuring mode, during one switching cycle (63B), all ON phases of all LEDs are briefly interrupted, except for one LED (11), so that a light sensor (70) measures the light from this one LED. This measurement can be used to adapt the duty cycle of this one LED. In the next switching cycle (63C), the interruption of the ON phases is compensated by extending the ON phases of all LEDs except said one LED, the extension having a duration equal to the duration (τD) of the interruption.
摘要翻译： 照明装置（1）包括产生彼此不同颜色的光（21-24）的多个LED（11-14）。 在具有恒定幅度的占空比控制的供电电流的开关周期（63）中驱动LED。 在每个开关周期中，每个LED首先接通（61），然后关闭（62）。 在测量模式下，在一个开关周期（63B）期间，除了一个LED（11）之外，所有LED的所有ON相都被短暂地中断，使得光传感器（70）测量来自该一个LED的光。 该测量可用于调整该一个LED的占空比。 在下一个开关周期（63C）中，通过扩展除了所述一个LED之外的所有LED的ON相位来补偿ON相位的中断，该延迟具有等于中断的持续时间（τD）的持续时间。
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