公开(公告)号：EP1344430A1

公开(公告)日：2003-09-17

申请号：EP01271030.7

申请日：2001-12-12

申请人： Koninklijke Philips Electronics N.V.

发明人： BUIJ, Arnold, W. ,  BEIJ, Marcel

IPC分类号： H05B41/285

CPC分类号： H05B41/2855

摘要： A ballast (1) for feeding a fluorescent lamp (9), comprising power supply means (2) for supplying a stabilised power to the lamp (9), dimming means (3) for adjusting said power, a voltmeter (5) which is capable of measuring the voltage across the lamp (9), comparator means (6) which are capable of comparing the measured voltage with a threshold value, contact breaker means (7) which are capable of interrupting the power supply to the lamp (9) when the measured voltage is higher than the threshold value for a predetermined period of time, as well as adjusting means (4) which are capable of adjusting the magnitude of the threshold value in dependence on the power.

公开(公告)号：EP1095542B1

公开(公告)日：2003-07-30

申请号：EP00927075.2

申请日：2000-04-20

申请人： Koninklijke Philips Electronics N.V.

发明人： BEIJ, Marcel ,  BUIJ, Arnold, W.

IPC分类号： H05B41/298

CPC分类号： H05B41/2985 ,  Y10S315/07

摘要： In an electronic ballast for operating a discharge lamp, the voltage across the heater windings during preheating the lamp electrodes is used to detect whether a lamp is present.

摘要翻译： 在用于操作放电灯的电子镇流器中，在预热灯电极期间加热器绕组两端的电压用于检测灯是否存在。

公开(公告)号：EP1095542A1

公开(公告)日：2001-05-02

申请号：EP00927075.2

申请日：2000-04-20

申请人： Koninklijke Philips Electronics N.V.

发明人： BEIJ, Marcel ,  BUIJ, Arnold, W.

IPC分类号： H05B41/298

CPC分类号： H05B41/2985 ,  Y10S315/07

摘要： In an electronic ballast for operating a discharge lamp, the voltage across the heater windings during preheating the lamp electrodes is used to detect whether a lamp is present.

公开(公告)号：EP1491076B1

公开(公告)日：2008-04-23

申请号：EP03706777.4

申请日：2003-02-26

申请人： Koninklijke Philips Electronics N.V.

发明人： BEIJ, Marcel ,  BUIJ, Arnold, W.

IPC分类号： H05B37/02

CPC分类号： H05B37/0254

摘要： In a digital interface comprising a current limiter, a reference voltage proportional to the bus voltage is generated and the current limiter is switched on when the incoming digital signal is higher than the reference voltage and switched of when the incoming signal is smaller than the reference voltage. The 'high/low-ratio' of the digital signal at the output of the interface is substantially improved by the use of the reference voltage.

公开(公告)号：EP1820375A1

公开(公告)日：2007-08-22

申请号：EP05807196.0

申请日：2005-11-21

申请人： Koninklijke Philips Electronics N.V.

发明人： MELAI, Henri, A., I. ,  BUIJ, Arnold, W.

IPC分类号： H05B41/282

CPC分类号： H05B41/2827 ,  H05B41/245

摘要： A gas discharge lamp driver circuit, comprising an inverter (10) of a bridge type, which has first and second input terminals connected to DC power lines (6, 8) for receiving a DC power voltage and output terminals (18) for providing a substantial rectangular power voltage, a ballast (20), which is connected to the output terminals of the inverter and to one or more lamp circuits (30), each having a gas discharge lamp (32) connected in series with a current control circuit having a high frequency semiconductor switch element (34), which receives an individual selection signal (Sl, S2) from a selection circuit (36), such that an individual lamp (32) can be selected to operate. If deselected, the switch element conducts such that current is diverted to a selected switch element to thereby only ignite and operate a lamp connected to a selected switch element.

公开(公告)号：EP1803334A1

公开(公告)日：2007-07-04

申请号：EP05805102.0

申请日：2005-10-06

申请人： Koninklijke Philips Electronics N.V.

发明人： BEIJ, Marcel ,  BUIJ, Arnold, W.

IPC分类号： H05B37/02

CPC分类号： H05B37/0245

摘要： A method for bonding a lighting device to a first lighting system, in which the first system comprises a master controller, which is remote from the lighting device and which may control a slave controller of the lighting device if the slave controller has stored therein an identification (ID) of the system. Upon powering up, if the slave controller contains such an ID, it tries to communicate with a master controller of the system. If the slave controller does not succeed in establishing such a communication it enters a state in which it can change it settings, in particular clearing said ID, upon receiving, during a time window with reduced communication security level, a message for allowing such changing of its settings.

公开(公告)号：EP1785014A1

公开(公告)日：2007-05-16

申请号：EP05773562.3

申请日：2005-07-27

申请人： Koninklijke Philips Electronics N.V.

发明人： WESSELS, Johannes, H. ,  BUIJ, Arnold, W. ,  VAN DER VEEN, Geert, W.

IPC分类号： H05B41/285

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.

公开(公告)号：EP1767066A1

公开(公告)日：2007-03-28

申请号：EP05757886.6

申请日：2005-06-29

申请人： Koninklijke Philips Electronics N.V.

发明人： BUIJ, Arnold, W. ,  VAN DER VEEN, Geert, W.

IPC分类号： H05B41/282

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.

公开(公告)号：EP1763977A1

公开(公告)日：2007-03-21

申请号：EP05752120.5

申请日：2005-06-23

申请人： Koninklijke Philips Electronics N.V.

发明人： BUIJ, Arnold, W. ,  VAN DER VEEN, Geert, W.

IPC分类号： H05B41/295

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.

公开(公告)号：EP1342393B1

公开(公告)日：2006-06-14

申请号：EP01982440.8

申请日：2001-10-18

申请人： Koninklijke Philips Electronics N.V.

发明人： BUIJ, Arnold, W. ,  BEIJ, Marcel

IPC分类号： H05B41/36 ,  H05B41/282

CPC分类号： H05B41/3925 ,  H05B41/2828 ,  H05B41/36

摘要： In an electronic ballast equipped with a digital lamp power control loop, the gain is controlled in dependence on the signs of consecutive error signals and the absolute values of these signals. The digital control loop is stable and comparatively fast for a wide range of values of the power consumed by the lamp.