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    • 1. 发明授权
    • Semiconductor-controlled operating circuit for one or more low-pressure
discharge lamps, typically fluorescent lamps
    • 用于一个或多个低压放电灯(通常为荧光灯)的半导体控制操作电路
    • US5589740A
    • 1996-12-31
    • US495803
    • 1995-06-27
    • Bernd RudolphAlwin Veser
    • Bernd RudolphAlwin Veser
    • H05B41/282H05B41/295H05B37/02
    • H05B41/295
    • To operate one or more serially connected low-pressure discharge lamps, tcally fluorescent lamps, a preheating circuit is provided to preheat the electrodes of the lamps (E1, E2, E3, E4), which changes from low-impedance to high-impedance state after the lamps have been preheated by controlling a semiconductor switch (Q3) in the heating circuit. In accordance with the invention, to eliminate reliance on the resistances of the lamp filaments themselves, which are subject to variation from lamp-to-lamp due to manufacturing tolerances, and later on, to changes due to aging of the lamp, and to provide for reliable switching of the semiconductor switch, a sensing impedance element (Z), which may be an ohmic resistor or a capacitor (Z', Z"), is serially connected to the switching path of the semiconductor switch (Q3) which, typically, is a field effect transistor (FET). The voltage drop across the series circuit formed by the impedance element (Z, Z', Z") and the semiconductor switch (Q3) is set by suitable dimensioning of the impedance element, to be sufficient to retain the main switching path of the semiconductor switch in low-impedance state when it carries full heater current, that is, is already in low-impedance state. To change over to high-impedance state, control signals to the semiconductor switch are removed, for example by shunting a resistor (R2) in a voltage divider, thus turning the semiconductor switch (Q3) OFF.
    • 为了操作一个或多个串联的低压放电灯(通常为荧光灯),提供预热电路以预热从低阻抗状态变为高阻态的灯(E1,E2,E3,E4)的电极 在通过控制加热电路中的半导体开关(Q3)来预热灯之后。 根据本发明,为了消除对灯丝本身的电阻的依赖性,由于制造公差以及随后由于灯的老化而发生的变化,灯丝本身会受到灯到灯的变化,并且提供 为了半导体开关的可靠切换,可以是欧姆电阻或电容器(Z',Z“)的感测阻抗元件(Z)串联连接到半导体开关(Q3)的开关路径, 通常是场效应晶体管(FET)。 由阻抗元件(Z,Z',Z“)和半导体开关(Q3)形成的串联电路两端的电压降通过阻抗元件的合适尺寸设定,足以保持阻抗元件 当半导体开关处于低阻抗状态时,其携带全加热器电流,即已经处于低阻抗状态。 为了切换到高阻抗状态,例如通过在分压器中分流电阻器(R2)来去除对半导体开关的控制信号,从而使半导体开关(Q3)关断。
    • 5. 发明申请
    • CIRCUIT ARRANGEMENT FOR OPERATING A SERIES CIRCUIT OF AT LEAST TWO LOW-PRESSURE GAS-DISCHARGE LAMPS, AND A CORRESPONDING METHOD
    • 用于操作至少两个低压气体放电灯的串联电路的电路装置以及相应的方法
    • US20100295459A1
    • 2010-11-25
    • US12782726
    • 2010-05-19
    • Bernd Rudolph
    • Bernd Rudolph
    • H05B41/36
    • H05B41/295
    • In various embodiments, a circuit arrangement for operating a series circuit of a first and a second low-pressure gas-discharge lamp is provided, which may include an input with a first and a second input connection for application of a supply voltage; an output with a first arrangement, which has a first and a second connection pair for connection of the first lamp, and a second arrangement, which has a first and a second connection pair for connection of the second lamp, wherein a first connection of the second pair of the first arrangement is coupled to a first connection of the first pair of the second arrangement; a resonant circuit; and a capacitive voltage divider, which has a first capacitor, which is coupled in parallel with the first arrangement, and a second capacitor, which is coupled in parallel with the second arrangement.
    • 在各种实施例中,提供了用于操作第一和第二低压气体放电灯的串联电路的电路装置,其可以包括具有用于施加电源电压的第一和第二输入连接的输入; 具有第一布置的输出,其具有用于连接第一灯的第一和第二连接对,以及具有用于连接第二灯的第一和第二连接对的第二布置,其中, 第二对第一布置被耦合到第一对第二布置的第一连接; 谐振电路; 以及电容分压器,其具有与第一布置并联耦合的第一电容器和与第二布置并联耦合的第二电容器。
    • 10. 发明授权
    • Buck converter and method for providing a current for at least one LED
    • 降压转换器和用于为至少一个LED提供电流的方法
    • US08207684B2
    • 2012-06-26
    • US12812962
    • 2008-01-17
    • Bernd Rudolph
    • Bernd Rudolph
    • H05B41/36H02M3/335
    • H05B33/0815
    • A Buck converter may include an input for connecting a DC voltage source; an output for connecting an LED; and a diode, an inductor and a main switch; wherein the diode and the main switch are coupled in series, wherein the inductor is coupled between the connecting point for the diode and the main switch, and a first output connection, wherein the converter further includes: a first auxiliary switch supplied with a first voltage; and a second auxiliary switch supplied with a second voltage, wherein the first auxiliary switch and the second auxiliary switch are coupled to the main switch such that the first voltage stipulates the switch-off time for the main switch and the second voltage stipulates the switch-on time for the main switch.
    • 降压转换器可以包括用于连接直流电压源的输入; 用于连接LED的输出; 和二极管,电感和主开关; 其中所述二极管和所述主开关串联耦合,其中所述电感器耦合在所述二极管的连接点和所述主开关之间,以及第一输出连接,其中所述转换器还包括:第一辅助开关,其被提供有第一电压 ; 以及提供有第二电压的第二辅助开关,其中所述第一辅助开关和所述第二辅助开关耦合到所述主开关,使得所述第一电压规定所述主开关的断开时间,并且所述第二电压规定所述开关 - 准时为主开关。