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318 条记录 (耗时 0.017 秒)

    Fixed-time, fixed-frequency, preheat-type ballast circuit for fluorescent light tube
    3.
    发明公开
    Fixed-time, fixed-frequency, preheat-type ballast circuit for fluorescent light tube 审中-公开
    镇流器电路预热型与固定的时间和固定的频率用于荧光灯管

    公开(公告)号：EP2440021A3

    公开(公告)日：2014-12-31

    申请号：EP10193170.7

    申请日：2010-11-30

    申请人： Skynet Electronic Co., Ltd.

    发明人： Liang, Jim-Hung

    IPC分类号： H05B41/282 ,  H05B41/295

    CPC分类号： H05B41/295 ,  H05B41/2828 ,  Y02B20/188

    摘要： The present invention is to provide a ballast circuit, which includes a preheat circuit configured to perform a fixed-time, fixed-frequency preheating process on filaments at both ends of a fluorescent light tube before it is lit. While the filaments are being preheated, a power driving circuit generates an output signal whose frequency is far higher than resonant frequency of a resonant circuit, and controls the preheat circuit for enabling a filament transformer and a high-frequency coupling capacitor in the preheat circuit to couple the voltage of the output signal to the filaments and thereby preheat the filaments, but not light up the light tube. When the preheat period is up, the power driving circuit stops the preheating process and changes the frequency of the output signal to a level close to the resonant frequency, thereby oscillating the resonant circuit and generating a high voltage enough for lighting the light tube.

    INSTANT START BALLAST SYSTEM
    4.
    发明公开
    INSTANT START BALLAST SYSTEM 审中-公开
    立即开始压载系统

    公开(公告)号：EP2700287A2

    公开(公告)日：2014-02-26

    申请号：EP12720281.0

    申请日：2012-04-16

    申请人： Koninklijke Philips N.V.

    发明人： FANG, Yuhong ,  GANESH, Arun

    IPC分类号： H05B41/295

    CPC分类号： H05B41/36 ,  H05B37/0272 ,  H05B41/295

    摘要： A program-start ballast(100) that is connectable to a lamp (150) with a filament (151) is disclosed. The ballast includes a heating unit (170) arranged to heat the filament (151), a receiver (180) arranged to receive a signal to turn the lamp (150) on or off, and a control circuit (160) arranged to turn the lamp (150) on or off based upon an output of the receiver (180). The heating unit (160) is further arranged to heat the filament (151) before the signal to turn the lamp on is received by the receiver (180) and keep the filament (151) heated after the signal to turn off the lamp is received by the receiver (180).

    GEREGELTE WENDELHEIZUNG FÜR GASENTLADUNGSLAMPEN
    6.
    发明公开
    GEREGELTE WENDELHEIZUNG FÜR GASENTLADUNGSLAMPEN 审中-公开
    控螺旋电热气体放

    公开(公告)号：EP2656697A2

    公开(公告)日：2013-10-30

    申请号：EP11815746.0

    申请日：2011-12-21

    申请人： Tridonic GmbH & Co KG

    发明人： KLIEN, Dietmar

    IPC分类号： H05B41/232 ,  H05B41/295 ,  H05B41/36

    CPC分类号： H05B41/3925 ,  H05B41/2325 ,  H05B41/295

    摘要： The invention relates to a ballast for at least one gas-discharge lamp, having a load circuit, to which the gas-discharge lamp is to be connected, a preferably switched-mode heating circuit controlled by means of a switch for at least one coil of the gas-discharge lamp, and a control circuit, wherein the control circuit directly or indirectly detects a temperature of at least one coil on the basis of a preferably electrical temperature parameter, such as for example, a voltage and/or a current at the at least one coil, and the control circuit uses the determined temperature parameter as an actual value for a control of a heat output in order to control the electrical heat output supplied to the coil according to the temperature parameter by activating, preferably pulsing, the switch of the heating circuit. The invention further relates to a method for controlling a coil voltage of a gas-discharge lamp and to a circuit for carrying out the method.

    DEVICE AND METHOD FOR AUTOMATICALLY DETECTING INSTALLED LAMP TYPE
    8.
    发明公开
    DEVICE AND METHOD FOR AUTOMATICALLY DETECTING INSTALLED LAMP TYPE 审中-公开
    DEVICE AND METHOD FOR自动检测安装的灯泡型的

    公开(公告)号：EP2622945A2

    公开(公告)日：2013-08-07

    申请号：EP11767770.8

    申请日：2011-09-09

    申请人： Koninklijke Philips Electronics N.V.

    发明人： KEITH, William, Lawrence ,  GRUEV, George

    IPC分类号： H05B41/295

    CPC分类号： H05B41/36 ,  H05B41/295

    摘要： An apparatus (1100, 2000, 3000) executes an algorithm (2000) to determine a type of lamp (10) that is installed in a lighting unit (1000). The apparatus supplies power to the installed lamp (10) according to a first power control setting that will not overdrive the installed lamp when the installed lamp is of a first lamp type, and that will overdrive the installed lamp when the installed lamp is of a second lamp type. The apparatus (1100, 2000, 3000) detects whether the installed lamp (10) is overdriven at the first power control setting, and uses the detection result to determine the lamp type of the installed lamp (10). The apparatus (1100, 2000, 3000) then supplies power to the installed lamp (10) according to the determined lamp type.

    ELECTRONIC BALLAST AND STARTUP METHOD
    10.
    发明公开
    ELECTRONIC BALLAST AND STARTUP METHOD 审中-公开
    电子镇流器及入手方法

    公开(公告)号：EP2454923A2

    公开(公告)日：2012-05-23

    申请号：EP10740003.8

    申请日：2010-06-30

    申请人： Koninklijke Philips Electronics N.V.

    发明人： FANG, Yuhong ,  VENKIT, Sree ,  PRADHAN, Sanjaya Kumar ,  LOPEZ, Alejandro ,  GROUEV, George ,  GANESH, Arun ,  RHODES, Bruce

    IPC分类号： H05B41/295

    CPC分类号： H05B41/295 ,  H05B41/2985

    摘要： ABSTRACT OF THE DISCLOSURE An electronic ballast and startup method including an electronic ballast operably connected to a lamp having a lamp filament, the electronic ballast having a timer (110) generating an inverter control signal (112) and a preheat control signal (114); a converter (120) receiving AC power and generating DC power (122); a self-oscillating inverter (130) receiving DC power (122) and being operable to provide lamp power (132) to the lamp, the self-oscillating inverter (130) being responsive to the inverter control signal (112); and a filament preheater (140) receiving DC power (122) and being operable to provide filament power (142) to the lamp filament, the filament preheater (140) being responsive to the preheat control signal (114). When AC power is initially applied, preheat control signal (114) directs the filament preheater (140) to provide filament power (142), and inverter control signal (112) directs the self-oscillating inverter (130) not to provide lamp power (132).