Method and device for driving a discharge lamp
Номер патента: EP1992205A1
Опубликовано: 19-11-2008
Автор(ы): Christianus J. Roozekrans, Leendert H. Goud
Принадлежит: KONINKLIJKE PHILIPS ELECTRONICS NV
Опубликовано: 19-11-2008
Автор(ы): Christianus J. Roozekrans, Leendert H. Goud
Принадлежит: KONINKLIJKE PHILIPS ELECTRONICS NV
Реферат: A method for driving a discharge lamp (1) having lamp electrodes (2, 3), at least one of said electrodes (2) being implemented as a filament having two electrode terminals (2a, 2b), comprises the following steps: during a first time interval (t1-t2), generating a discharge lamp current (I L) in said discharge lamp (1); during a second time interval (t2-t3), interrupting the discharge lamp current (I L); during both intervals (t1-t3), passing an electrode heating current (I C) through said one electrode (2); wherein, during said first time interval (t1-t2), the discharge lamp current magnitude (I L1) is less than 90% of the nominal current magnitude (I NOM); and wherein the electrode heating current (I C) is set such that the hot resistance R H of said one electrode (2) is within 4.3 to 4.7 times the cold resistance R C; wherein during the second time interval, the electrode heating current is larger than during the first time interval.
Method of shutting down a high pressure discharge lamp and driving unit for driving a high pressure discharge lamp
Номер патента: EP1897417A2. Автор: John-John Pieter Jan Van Den Bergh,Carsten c/o Philips I.P. & Standards GmbH DEPPE,Holger c/o Philips I.P. & Standards GmbH MOENCH,Jens Philips I.P. & Standards GmbH POLLMANN-RETSCH,Tom c/o Philips I.P. & Standards GmbH MUNTERS. Владелец: Philips Intellectual Property and Standards GmbH. Дата публикации: 2008-03-12.