公开(公告)号：DE602004012450T2

公开(公告)日：2009-03-19

申请号：DE602004012450

申请日：2004-12-16

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： MOENCH HOLGER ,  PEKARSKI PAVEL ,  STOFFELS JAN ALFONS JULIA

IPC: H05B41/292 ,  H01J61/073 ,  H01J61/86

Abstract: A method and a circuit arrangement for operating a discharge lamp, in particular during the first hours of operation after lamp manufacture, are described. The method and the circuit arrangement are provided in particular for high-pressure gas discharge lamps (HID or high intensity discharge lamps or UHP or ultra high performance lamps). Furthermore, a lighting unit with a discharge lamp and such a circuit arrangement and a projection system with a projection display and such a lighting unit are described. Switching-over between various modes of operation with different operating frequencies serves to avoid that the burning voltage of the lamp drops into a region of a minimum voltage of a lamp driver unit below which the latter can no longer drive the lamp with its rated power or a desired power.

公开(公告)号：DE60318856T2

公开(公告)日：2009-01-22

申请号：DE60318856

申请日：2003-07-11

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： MOENCH HOLGER

IPC: G03B21/00 ,  H05B41/392 ,  H04N5/74 ,  H04N9/31

公开(公告)号：DE602005010122D1

公开(公告)日：2008-11-13

申请号：DE602005010122

申请日：2005-12-19

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： MOENCH HOLGER ,  HEUSLER GERO

IPC: G02F1/35 ,  H01L33/50

Abstract: The present invention is directed to a wavelength conversion layer (1) with a matrix layer (2) comprising embedded rare-earth-ion-doped micro-crystallites (3) and/or rare-earth-ion-doped amorphous particles, wherein said rare-earth-ion-doped micro crystallites and/or rare-earth-ion-doped amorphous particles are doped with at least one of the lanthanides, and wherein said rare-earth-ion-doped micro-crystallites and/or said doped amorphous particles have a mean diameter d50 of 10 nm to 500 müm, and wherein the matrix layer, is transparent, whereby the refractive indices of said rare-earth-ion-doped micro-crystallites and/or said rare-earth-ion-doped amorphous particles match the refractive indices of the matrix layer with an index fifference delta n such as: 0

公开(公告)号：DE602005009546D1

公开(公告)日：2008-10-16

申请号：DE602005009546

申请日：2005-08-04

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： PEKARSKI PAVEL ,  WIJNTJENS JOHAN ,  MOENCH HOLGER ,  POLLMANN-RETSCH JENS

IPC: H05B41/292

Abstract: A method and a circuit arrangement operate a discharge lamp, such as a high-intensity discharge lamp (HID) or ultra high performance lamps (UHP). The discharge lamp has first and second operating phases with a higher first or a lower second frequency of the lamp's alternating current (AC). The operating phases are activated alternatively at defined intervals and for defined periods of time, in order to achieve a stable arc discharge and only a low burnout or rise in burning voltage of the lamp during its life by configuring certain forms of electrode tips.

公开(公告)号：DE60222793T2

公开(公告)日：2008-09-04

申请号：DE60222793

申请日：2002-10-15

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： MOENCH HOLGER ,  RITZ ARND

IPC: F21V7/04 ,  G03B21/14 ,  F21S2/00 ,  F21V7/00 ,  F21V7/09 ,  F21V7/22 ,  F21V13/00 ,  F21Y101/00 ,  H01J61/02 ,  H01J61/35 ,  H01J61/86 ,  H01J61/88 ,  H04N9/31

Abstract: An illumination unit has a light source, in particular a high-intensity discharge lamp or an ultra high performance lamp, a main reflector and a back reflector with an aperture opposite the main reflector. Light is reflected from the light source through the aperture onto the main reflector. The centers of the light source and the back reflector are located or shaped relative to each other such that a first sector angle (L 2 -L 2 ') enclosed between the light source center and the edge of the back reflector aperture is smaller than 180°. The efficiency of light emission is considerably increased. Preferred embodiments, each of which can cause a further increase in light output, relate to various shapes of the back reflector and the inner walls of the gas discharge space, as well as to the shape of the part of the glass bulb that surrounds the gas discharge space.

公开(公告)号：DE60318856D1

公开(公告)日：2008-03-13

申请号：DE60318856

申请日：2003-07-11

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： MOENCH HOLGER

IPC: G03B21/00 ,  H05B41/392 ,  H04N5/74 ,  H04N9/31

公开(公告)号：DE69921616D1

公开(公告)日：2004-12-09

申请号：DE69921616

申请日：1999-12-02

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY

Inventor： DERRA H ,  FISCHER E ,  GANSER G ,  KRUECKEN THOMAS ,  MOENCH HOLGER ,  SNIJKERS ROB

IPC: H05B41/24 ,  H05B41/282 ,  H05B41/292

Abstract: The invention is concerned with a circuit arrangement for operating a high pressure discharge lamp comprising input terminals (K1, K2) for connection to a supply voltage source, output terminals for connecting the high pressure discharge lamp, and means, coupled to the input terminals, for supplying an alternating lamp current to the high pressure discharge lamp. The lamp current has per period a mean value Im. According to the invention the lamp current in each period at its start is lowered with respect to the mean value Im so as to allow for stable diffuse attachment on the cathodic phase electrode. The circuit arrangement is in particular suited for operating a lamp in an optical projection system

公开(公告)号：DE69912102T2

公开(公告)日：2004-07-29

申请号：DE69912102

申请日：1999-12-01

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY

Inventor： DERRA H ,  FISCHER E ,  GANSER G ,  KRUCKEN THOMAS ,  MOENCH HOLGER ,  SNIJKERS ROB

IPC: H05B41/282 ,  H05B41/16 ,  H05B41/292

Abstract: A circuit arrangement is provided for operating a high pressure discharge lamp with a lamp current which, in successive periods, has opposite polarities. The lamp is provided with at least two main electrodes being spaced an electrode distance from each other. The circuit arrangement includes input terminals for connection to a supply source, output terminals for connection to the high pressure discharge lamp, and an element, coupled to the input terminals, for supplying the lamp current to the high pressure discharge lamp, which current, in successive periods, has a predetermined shape. The circuit arrangement is provided with an element for detecting a first parameter indicative of the electrode distance and forming a first signal dependent on the first parameter and with an element for reshaping the lamp current, in successive periods, in dependence of the thus formed first signal.

公开(公告)号：DE10248376A1

公开(公告)日：2004-04-29

申请号：DE10248376

申请日：2002-10-17

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： DEPPE CARSTEN ,  MOENCH HOLGER

IPC: H04N9/31 ,  H05B41/292 ,  H04N5/74

Abstract: A projection system for image representation includes a display, a lamp, and a sensor for generating a sensor signal for monitoring and compensating changes in the luminous flux provided by the lamp. To achieve a monitoring of the light quantity actually incident on the display, an optical component is arranged in a light path between the lamp and the display. The optical component allows a first light component to pass through and reflects a second light component such that one of the light components is directed at the display and the other light component is directed at the sensor arranged outside the light path. A sensor signal generated in this manner renders it possible to compensate for fluctuations in the luminous flux provided by the lamp through the control of a lamp driver in an effective.

公开(公告)号：DE69912101D1

公开(公告)日：2003-11-20

申请号：DE69912101

申请日：1999-12-13

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY

Inventor： HEVINGA A ,  MOENCH HOLGER ,  RIEDERER XAVER

IPC: G02F1/13357 ,  H04N5/74 ,  H05B41/14 ,  H05B41/16 ,  H05B41/288 ,  H05B41/392

Abstract: A circuit arrangement for operating a high pressure discharge lamp includes input terminals for connection to a supply voltage source, lamp connection terminals for connection of the lamp, and a power supply coupled to the input terminals. The power supply provides a current to the lamp in the form of successive periods of current and includes a pulse generating element for generating a current pulse superpositioned on the periods of the current to the lamp. The pulse generation element is synchronized with an image writing signal.