公开(公告)号：US5872429A

公开(公告)日：1999-02-16

申请号：US824024

申请日：1997-03-25

申请人： Yongping Xia ,  Sreeraman Venkitasubrahmanian ,  Raj Jayaraman ,  Thomas Farkas

发明人： Yongping Xia ,  Sreeraman Venkitasubrahmanian ,  Raj Jayaraman ,  Thomas Farkas

IPC分类号： H05B37/02 ,  H05B41/282 ,  H05B41/298 ,  H05B41/392

CPC分类号： H05B41/2828 ,  H05B37/0263 ,  H05B41/2981 ,  H05B41/3921 ,  Y10S315/04

摘要： A communication method particularly suited for lighting control employs encoding of perturbations in a voltage signal having a fundamental period with a nominal waveform. A control period includes a pre-selected number of fundamental periods of the voltage signal. Different control commands are indicated by imposing a selected perturbation, such as a phase cut, on the nominal waveform with a respective occurrence signature within the control period. The control commands are decoded from the voltage signal by detecting the occurrence signature of the perturbations within each control period. Decoding is accomplished by differentiating the nominal waveform to detect encoded perturbations. The technique is particularly suited for two-wire dimming applications for gas discharge lamps, in which the voltage signal carrying the encoded commands is the sinusoidal mains voltage powering the ballast, since the encoded perturbations may be small enough so that lamp flicker is avoided even with encoded signals on the line voltage. In a favorable embodiment for dimming, no perturbations are introduced on the line voltage unless a change in the operating characteristic, for example the light level, of the electric lamp is desired. This has the advantage that when lamp operation is to be kept constant, no distortions are imposed on the mains voltage, so that flicker of the lamp(s) is completely avoided and there are no adverse effects to the power factor, THD or component stress.

摘要翻译： 特别适用于照明控制的通信方法使用具有标称波形的基本周期的电压信号中的扰动编码。 控制周期包括电压信号的预选数量的基本周期。 通过在控制周期内具有相应的发生签名在标称波形上施加选择的扰动（例如相位切除）来指示不同的控制命令。 通过检测每个控制周期内扰动的发生特征，从电压信号对控制命令进行解码。 通过区分标称波形来检测编码的扰动来完成解码。 该技术特别适用于气体放电灯的双线调光应用，其中携带编码命令的电压信号是为镇流器供电的正弦电源电压，因为编码的扰动可能足够小，以便避免灯闪烁，即使使用 编码信号的线路电压。 在用于调光的有利实施例中，除非需要电灯的工作特性（例如光级）的改变，否则不会在线路电压上引入扰动。 这样做的优点在于，当灯管运行保持恒定时，不会对电源电压造成失真，从而完全避免了灯的闪烁，并且对功率因数，THD或分量应力没有不利影响 。

公开(公告)号：US5691605A

公开(公告)日：1997-11-25

申请号：US512868

申请日：1995-08-09

申请人： Yongping Xia ,  Joshua Zhu ,  Sreeraman Venkitasubrahmanian ,  Raj Jayaraman ,  Thomas Farkas

发明人： Yongping Xia ,  Joshua Zhu ,  Sreeraman Venkitasubrahmanian ,  Raj Jayaraman ,  Thomas Farkas

IPC分类号： H05B41/38 ,  H05B37/02 ,  H05B41/285 ,  H05B41/36 ,  H05B41/392 ,  H02B37/02

CPC分类号： H05B41/2855 ,  H05B37/0263 ,  H05B41/2985 ,  H05B41/36 ,  H05B41/3921 ,  H05B41/3924 ,  Y10S315/04

摘要： A lamp controller includes an interface circuit, or receiver, which receives an input signal and decodes control signals supplied from a transmitting device, such as a power line wall controller, according to at least two of the following communication techniques: phase angle control, step control, and coded control. The receiver tests the input signal and identifies which type of control technique is employed by the wall controller connected to the lamp controller. The receiver then decodes the control command from the input signal. In a disclosed embodiment, the lamp controller is gas discharge lamp dimming ballast having a two wire input for connection to the hot dimmed and neutral leads of the power line controller. The ballast has an improved topology in which a pre-conditioner supplies a substantially constant DC voltage to a ballast stage including an inverter, a resonant tank output and a control circuit. The dim signal output by the receiver is independent of the DC rail voltage and, in combination with the maintenance of a substantially constant DC rail voltage, permits of improved dimming control while providing the ease of installation of a two wire ballast.

摘要翻译： 灯控制器包括接口电路或接收器，接口电路或接收器根据以下通信技术中的至少两个接收输入信号和解码从诸如电力线壁控制器的发送设备提供的控制信号：相位角控制，步骤 控制和编码控制。 接收机测试输入信号，并识别连接到灯控制器的墙壁控制器采用哪种类型的控制技术。 然后，接收器从输入信号解码控制命令。 在公开的实施例中，灯控制器是具有两线输入的气体放电灯调光镇流器，用于连接到电力线控制器的热调光和中性线。 镇流器具有改进的拓扑结构，其中预调节器向包括逆变器，谐振回路输出和控制电路的镇流器提供基本上恒定的DC电压。 由接收器输出的暗信号与直流轨道电压无关，并且与基本上恒定的直流轨电压的维持相结合，允许改进的调光控制，同时提供双线镇流器的易于安装。

公开(公告)号：US5604411A

公开(公告)日：1997-02-18

申请号：US422198

申请日：1995-03-31

申请人： Sreeraman Venkitasubrahmanian ,  Gert W. Bruning ,  Paul Veldman ,  Thomas Farkas ,  Raj Jayaraman ,  Yongping Xia

发明人： Sreeraman Venkitasubrahmanian ,  Gert W. Bruning ,  Paul Veldman ,  Thomas Farkas ,  Raj Jayaraman ,  Yongping Xia

IPC分类号： H05B41/28 ,  H05B41/392 ,  G05F1/00

CPC分类号： H05B41/3924 ,  H05B41/28 ,  Y10S315/04

摘要： A dimming ballast for use with a phase control dimmer, and particularly a triac dimmer, includes an EMI filter selected with a high impedance to avoid excessive voltage and peak currents in the filter due to resonance with the phase controlled AC waveform at low conduction angles, when the load presented by the lamp is low. The EMI filter includes a filter capacitor connected at the output of a rectifier. The ballast also includes circuitry to sense the rectified DC voltage and to discharge the filter capacitor when the rectified voltage is at or near zero, to thereby keep the EMI filter loaded and prevent misfiring of the triac dimmer. In a favorable embodiment, the sensing and discharge function is carried out by a pre-conditioner of the switched-mode type.

摘要翻译： 与相位控制调光器特别是三端双向可控硅调光器一起使用的调光镇流器包括由高阻抗选择的EMI滤波器，以避免由于在低导通角下与相位受控AC波形的谐振而导致滤波器中过大的电压和峰值电流， 当灯呈现的负载较低时。 EMI滤波器包括连接在整流器输出端的滤波电容器。 镇流器还包括用于感测整流的直流电压并在整流电压处于或接近零时对滤波电容器进行放电的电路，从而保持EMI滤波器的负载并防止三端双向可控硅调光器的失火。 在有利的实施例中，感测和放电功能由切换模式类型的预调节器来执行。

公开(公告)号：US5559395A

公开(公告)日：1996-09-24

申请号：US414859

申请日：1995-03-31

申请人： Sreeraman Venkitasubrahmanian ,  Thomas Farkas ,  Raj Jayaraman ,  Yongping Xia

发明人： Sreeraman Venkitasubrahmanian ,  Thomas Farkas ,  Raj Jayaraman ,  Yongping Xia

IPC分类号： H05B37/02 ,  H05B41/285 ,  H05B41/36 ,  H05B41/392

CPC分类号： H05B41/2985 ,  H05B37/0263 ,  H05B41/2855 ,  H05B41/36 ,  H05B41/3921 ,  H05B41/3924 ,  Y10S315/04

摘要： A gas discharge lamp dimming ballast has a two wire input for connection to the hot dimmed and neutral leads of a phase control dimmer. The ballast has an improved topology in which a pre-conditioner supplies a substantially constant DC voltage to a ballast stage including an inverter, a resonant tank output and a control circuit. A dimming interface circuit derives a dimming signal having a voltage equal to the average value of the rectified output voltage of a full-bridge rectifier feeding the pre-conditioner circuit. The dim signal is independent of the DC rail voltage and, in combination with the maintenance of a substantially constant DC rail voltage, permits of improved dimming control while providing the ease of installation of a two wire ballast. The response time of the interface circuit relative to the pre-conditioner is selected to avoid power imbalances. The ballast also includes an EMI filter and circuitry to prevent capacitive hold-up by the EMI filter of the rectified voltage to preserve the conduction angle for the interface circuit.

摘要翻译： 气体放电灯调光镇流器具有两线输入，用于连接到相位控制调光器的热调光和中性线。 镇流器具有改进的拓扑结构，其中预调节器向包括逆变器，谐振回路输出和控制电路的镇流器提供基本上恒定的DC电压。 调光接口电路导出具有等于馈送预调节器电路的全桥整流器的整流输出电压的平均值的电压的调光信号。 昏暗的信号与直流轨道电压无关，并且与基本上恒定的直流轨道电压的维持相结合，允许改进的调光控制，同时提供双线镇流器的易于安装。 选择接口电路相对于预调节器的响应时间以避免电源不平衡。 镇流器还包括EMI滤波器和电路，用于防止EMI滤波器对整流电压的电容性保持，以保持接口电路的导通角。

公开(公告)号：US5751115A

公开(公告)日：1998-05-12

申请号：US759350

申请日：1996-12-03

申请人： Raj Jayaraman ,  Yongping Xia ,  Sreeraman Venkitasubrahmanian ,  Paul Leyton

发明人： Raj Jayaraman ,  Yongping Xia ,  Sreeraman Venkitasubrahmanian ,  Paul Leyton

IPC分类号： H05B41/282 ,  H05B41/298 ,  H05B41/392 ,  H05B41/14

CPC分类号： H05B41/2828 ,  H05B41/2981 ,  H05B41/3925 ,  Y02B20/186 ,  Y10S315/05

摘要： A ballast includes safety circuitry which senses lamp status through various phases of ballast operation. According to one feature, the ballast is prevented from supplying an output voltage upon initial energization of the ballast when a lamp is not present at the output terminals. The presence of a filament is sensed via a DC path extending through the filament heater windings of an output transformer. When the DC path is not complete, a control input, for example the power supply input of the ballast controller, is not provided with a voltage to start ballast operation. The DC path is also used to restart the ballast if a defective lamp is replaced with a good one. Over-voltage and capacitive mode detection is also disclosed to shut down ballast output upon lamp failure/removal.

摘要翻译： 镇流器包括通过镇流器操作的各个阶段感​​测灯状态的安全电路。 根据一个特征，当在输出端子处不存在灯时，防止镇流器在初始通电时提供输出电压。 通过延伸穿过输出变压器的灯丝加热器绕组的DC路径来感测灯丝的存在。 当DC路径不完整时，控制输入（例如镇流器控制器的电源输入）没有提供用于启动镇流器操作的电压。 如果更换有故障的灯泡，则直流路径也用于重新启动镇流器。 还公开了过压和电容模式检测，以在灯故障/去除时关闭镇流器输出。

公开(公告)号：US5650694A

公开(公告)日：1997-07-22

申请号：US415020

申请日：1995-03-31

申请人： Raj Jayaraman ,  Yongping Xia ,  Sreeraman Venkitasubrahmanian ,  Paul Leyten

发明人： Raj Jayaraman ,  Yongping Xia ,  Sreeraman Venkitasubrahmanian ,  Paul Leyten

IPC分类号： H05B41/282 ,  H05B41/298 ,  H05B41/392 ,  H05B41/14

CPC分类号： H05B41/2828 ,  H05B41/2981 ,  H05B41/3925 ,  Y02B20/186 ,  Y10S315/05

摘要： A ballast includes safety circuitry which senses lamp status through various phases of ballast operation. According to one feature, the ballast is prevented from supplying an output voltage upon initial energization of the ballast when a lamp is not present at the output terminals. The presence of a filament is sensed via a DC path extending through the filament heater windings of an output transformer. When the DC path is not complete, a control input, for example the power supply input of the ballast controller, is not provided with a voltage to start ballast operation. The DC path is also used to restart the ballast if a defective lamp is replaced with a good one. Over-voltage and capacitive mode detection is also disclosed to shut down ballast output upon lamp failure/removal.

摘要翻译： 镇流器包括通过镇流器操作的各个阶段感​​测灯状态的安全电路。 根据一个特征，当在输出端子处不存在灯时，防止镇流器在初始通电时提供输出电压。 通过延伸穿过输出变压器的灯丝加热器绕组的DC路径来感测灯丝的存在。 当DC路径不完整时，控制输入（例如镇流器控制器的电源输入）没有提供用于启动镇流器操作的电压。 如果更换有故障的灯泡，则直流路径也用于重新启动镇流器。 还公开了过压和电容模式检测，以在灯故障/去除时关闭镇流器输出。

公开(公告)号：US4609929A

公开(公告)日：1986-09-02

申请号：US684442

申请日：1984-12-21

申请人： Raj Jayaraman ,  Barry M. Singer

发明人： Raj Jayaraman ,  Barry M. Singer

IPC分类号： H01L21/331 ,  H01L21/8249 ,  H01L27/06 ,  H01L27/07 ,  H01L29/10 ,  H01L29/73 ,  H01L29/735 ,  H01L29/739 ,  H01L29/78 ,  H01L27/04 ,  H01L29/72

CPC分类号： H01L29/7816 ,  H01L27/0716 ,  H01L29/1087 ,  H01L29/735 ,  H01L29/7801 ,  H01L29/739 ,  Y10S257/901

摘要： A combined lateral MOS/bipolar transistor includes an intermediate semiconductor layer of the same conductivity type as the channel region which extends laterally from the channel region to beneath the drain contact region of the device. Additionally, a floating semiconductor layer of opposite conductivity type to that of the channel region is provided between the intermediate layer and the substrate of the device. Both the intermediate layer and the substrate are relatively lightly doped, to effectively isolate the floating layer from above and below. This structure substantially improves the operating chartacteristics of the device, thus permitting operation in both the source-follower and common-source modes, while also providing a compact structure which features a relatively low normalized "on" resistance.

摘要翻译： 组合的横向MOS /双极晶体管包括与沟道区相同的导电类型的中间半导体层，该沟道区从沟道区域横向延伸到器件的漏极接触区域的下方。 此外，在器件的中间层和衬底之间设置与沟道区相反的导电类型的浮动半导体层。 中间层和衬底都相对轻掺杂，以有效地将浮层从上下分离。 该结构大大改善了器件的工作特性，从而允许在源极跟随器和共源模式两者中工作，同时还提供具有相对低的标准化“导通”电阻的紧凑结构。