EP 2399431 A1 20111228 - METHOD FOR OPERATING A PROJECTOR HAVING A HIGH-PRESSURE DISCHARGE LAMP
Title (en)
METHOD FOR OPERATING A PROJECTOR HAVING A HIGH-PRESSURE DISCHARGE LAMP
Title (de)
VERFAHREN ZUM BETREIBEN EINES PROJEKTORS MIT EINER HOCHDRUCKENTLADUNGSLAMPE
Title (fr)
PROCÉDÉ POUR FAIRE FONCTIONNER UN PROJECTEUR ÉQUIPÉ D'UNE LAMPE À DÉCHARGE HAUTE PRESSION
Publication
Application
Priority
EP 2009055898 W 20090515
Abstract (en)
[origin: WO2010130292A1] The invention relates to an LCD projector having a high-pressure discharge lamp, wherein the luminous intensity of the lamp is adapted to the average brightness of the image during projection, in order to thereby improve the contrast of the projection. The luminous intensity of the lamp has previously not been adjustable to a desirable degree. Reducing the luminous intensity of the lamp during projection of a dark image, for example, is hindered by the fact that the lamp must be protected against severe cooling. According to the invention, the temperature of the lamp is monitored, and the luminous intensity of the lamp is increased if the lamp becomes too cold. The invention is particularly suitable for projecting image sequences of a movie.
IPC 8 full level
H05B 41/392 (2006.01); G03B 21/14 (2006.01); G09G 3/00 (2006.01); H04N 5/74 (2006.01)
CPC (source: EP US)
G03B 21/16 (2013.01 - EP US); G03B 21/2026 (2013.01 - EP US); G03B 21/2053 (2013.01 - EP US); G09G 3/3406 (2013.01 - EP US); H04N 9/3155 (2013.01 - EP US); H05B 41/38 (2013.01 - EP US); G09G 2320/0646 (2013.01 - EP US)
Citation (search report)
See references of WO 2010130292A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2010130292 A1 20101118; CN 102422721 A 20120418; EP 2399431 A1 20111228; US 2012050351 A1 20120301
DOCDB simple family (application)
EP 2009055898 W 20090515; CN 200980159296 A 20090515; EP 09779488 A 20090515; US 200913319522 A 20090515