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1. (US20100134765) METHOD OF DRIVING A DISCHARGE LAMP IN A PROJECTION SYSTEM, AND DRIVING UNIT

Office : United States of America
Application Number: 11993498 Application Date: 23.06.2006
Publication Number: 20100134765 Publication Date: 03.06.2010
Publication Kind : A1
Prior PCT appl.: Application Number:IB06052057 ; Publication Number: Click to see the data
IPC:
G03B 21/20
G PHYSICS
03
PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
B
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
21
Projectors or projection-type viewers; Accessories therefor
14
Details
20
Lamp housings
Applicants: KONINKLIJKE PHILIPS ELECTRONICS, N.V.
Inventors: Deppe Carsten
Munters Tom
Agents: PHILIPS INTELLECTUAL PROPERTY & STANDARDS
Priority Data: 05105872 30.06.2005 EP
Title: (EN) METHOD OF DRIVING A DISCHARGE LAMP IN A PROJECTION SYSTEM, AND DRIVING UNIT
Abstract: front page image
(EN)

The invention describes a method of driving a discharge lamp (1) in a projection system (10), wherein, in a feed-forward control process, system status data (SDL, SDF, SDV) comprising static information pertaining to the design of the system and/or dynamic information pertaining to the projection system and/or dynamic information pertaining to the lamp operation are obtained. Based on the system status data (SDL, SDF, SDV), a momentary target light waveshape (LWT, LWT′) required by the projection system (10) and a waveshape correcting function are determined. Subsequently, the actual current (I) of the discharge lamp (1) is controlled regulated according to a momentary required waveshape (RW) which is determined based on the target light waveshape (LWT, LWT′) and the waveshape correcting function. Moreover the invention describes an appropriate driving unit (11) for driving a discharge lamp (1) and a projection system (10), comprising such a driving unit (11).


Also published as:
KR1020080030063EP1905280JP2008545154CN101213884WO/2007/004101