Method for reducing a light intensity of a projection device

A method for reducing a light intensity of a projection device is provided which includes the following steps: projecting information in the form of a visual representation onto a total area; emitting a plurality of electromagnetic signals which are essentially imperceptible to an observer onto the...

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Bibliographische Detailangaben
Hauptverfasser:	Liu Ming, Fischer Frank, Pilard Gael, Kreye Daniel, Slogsnat David
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CALCULATING CINEMATOGRAPHY COMPUTING COUNTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRIC DIGITAL DATA PROCESSING ELECTRICITY ELECTROGRAPHY HOLOGRAPHY PHOTOGRAPHY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION
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Beschreibung
Zusammenfassung:	A method for reducing a light intensity of a projection device is provided which includes the following steps: projecting information in the form of a visual representation onto a total area; emitting a plurality of electromagnetic signals which are essentially imperceptible to an observer onto the total area, using the projection device; detecting objects situated in the light path between the projection device and the total area with the aid of the electromagnetic signals; and reducing the light intensity of the projection device as long as an object is detected in the light path.