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34 records (took 0.023 seconds)

    1.
    发明专利
    未知

    公开(公告)号：DE60224094T2

    公开(公告)日：2008-11-20

    申请号：DE60224094

    申请日：2002-12-18

    Applicant: PHILIPS INTELLECTUAL PROPERTY

    Inventor： LUERKENS PETER

    IPC: H05B41/24 ,  H05B41/288

    Abstract: The invention relates to an electronic circuit and to a method of operating a high-pressure lamp in various operational modes. The circuit comprises a DC-AC converter consisting of two bridges (110-1) and (110-2). A series circuit comprising a first coil L1, the high-pressure lamp (120), and a second coil L2 is connected between the outputs (112-1) and (112-2) of these two half bridges. The invention has for its obeject to develop such a known circuit further such that it is equally suitable for an ignition mode and for a normal operational mode of the high-pressure lamp, without individual components having to be overdimensioned. According to the invention, this object is achieved in that a first capacitor C1 is connected in a path from the junction point of the first coil L1 and the high-pressure lamp (120) either to a reference potential (-) or to an operating potential (+), and in that a second capacitor C2 is connected in the path from the junction point of the high-pressure lamp (120) and the second coil L2 either to the reference potential (-) or to the operating potential (+) or in parallel to the high-pressure lamp (120).

    3.
    发明专利
    未知

    公开(公告)号：DE602006008968D1

    公开(公告)日：2009-10-15

    申请号：DE602006008968

    申请日：2006-10-02

    Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV

    Inventor： SCHEEL THOMAS ,  LUERKENS PETER

    IPC: G05B17/02

    Abstract: Determining estimations of states of a physical system ( 2 ) by using an observer ( 4 ), which comprises a mathematical model ( 6 ) of the physical system. The observer ( 4 ) is supplied with a value of at least one entity (Y 1 , Y 2 , Y 3 , . . . ) of the physical system and values of input entities (IN) supplied to the system also, to provide estimated values of entities (Y 1 b, Y 2 b, Y 3 b, . . . ) of the model. At least one estimated value (Y 1 b) is compared with a related given reference value (Y 1 ref) to provide an error value (e 1 ). The given reference value (Y 1 ref) is compared with the related monitored entity (Y 1 ) and when (ttrig) becoming equal the error value (e 1 ) is used for correction of the estimated values (Y 1 b, Y 2 b, Y 3 b, . . . ).

    6.
    发明专利
    未知

    公开(公告)号：DE10244821A1

    公开(公告)日：2004-04-01

    申请号：DE10244821

    申请日：2002-09-26

    Applicant: PHILIPS INTELLECTUAL PROPERTY

    Inventor： DEPPE CARSTEN ,  LUERKENS PETER ,  MOENCH HOLGER

    IPC: H04N9/31 ,  H05B41/288 ,  H05B41/292 ,  G03B21/00

    Abstract: A projection system for image reproduction includes at least one lamp and sensor for generating a sensor signal for monitoring changes in the luminous flux generated by the lamp and for compensating these changes through a suitable control of the image reproduction. The projection system further includes a device for eliminating substantially periodic interference components from the sensor signal generated by the sensor. These interference components may be generated by an optical component such as a color modulator of the projection system. The projection system provides substantially interference-free compensation of fluctuations in the luminous flux generated by the lamp, for example, owing to an unstable arc discharge. Further, the positioning of the sensor in the projection system may not be critical.

    8.
    发明专利
    未知

    公开(公告)号：DE10209631A1

    公开(公告)日：2003-09-18

    申请号：DE10209631

    申请日：2002-03-05

    Applicant: PHILIPS INTELLECTUAL PROPERTY

    Inventor： LUERKENS PETER ,  MOENCH HOLGER

    IPC: H05B41/282 ,  H05B41/292

    Abstract: The invention relates to an electronic circuit and a method of supplying energy to a high-pressure gas-discharge lamp H, 65, 75 . The electronic circuit comprises a line-supply input section 62, 72 to receive and convert an a.c. voltage from an a.c. line-supply system 61, 71 , an energy storage means 63, 73 to store the energy put out by the line-supply input section 62, 72 and a lamp-current regulating unit 64, 74 that is supplied with an input voltage U 1 by the line-supply input section 62, 72 via the energy storage means 63, 73 and that makes available a lamp current I 2 for a high-pressure gas-discharge lamp II, 65, 75 . To make it possible for the energy storage means 63, 73 to be particularly small, it is proposed that the lamp-current regulating unit 64, 74 have a power section L, D, C, S, A 1 , A 2 , K having a transconductive property. If there is a drop in the input voltage U 1 , this property then automatically produces a reduction in the lamp current I 2 made available to a high-pressure gas-discharge lamp 65, 75 , H. This ensures a particularly fast adjustment to voltage fluctuations. The invention also relates to a corresponding method.

    10.
    发明专利
    未知

    公开(公告)号：DE10200004A1

    公开(公告)日：2003-07-17

    申请号：DE10200004

    申请日：2002-01-02

    Applicant: PHILIPS INTELLECTUAL PROPERTY

    Inventor： LUERKENS PETER

    IPC: H05B41/24 ,  H05B41/288 ,  H05B41/36 ,  G01R33/09

    Abstract: The invention relates to an electronic circuit and to a method of operating a high-pressure lamp in various operational modes. The circuit comprises a DC-AC converter consisting of two bridges (110-1) and (110-2). A series circuit comprising a first coil L1, the high-pressure lamp (120), and a second coil L2 is connected between the outputs (112-1) and (112-2) of these two half bridges. The invention has for its obeject to develop such a known circuit further such that it is equally suitable for an ignition mode and for a normal operational mode of the high-pressure lamp, without individual components having to be overdimensioned. According to the invention, this object is achieved in that a first capacitor C1 is connected in a path from the junction point of the first coil L1 and the high-pressure lamp (120) either to a reference potential (-) or to an operating potential (+), and in that a second capacitor C2 is connected in the path from the junction point of the high-pressure lamp (120) and the second coil L2 either to the reference potential (-) or to the operating potential (+) or in parallel to the high-pressure lamp (120).

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