Projector with a brightness-adjusting apparatus and method for adjusting brightness for the same

A projector comprises a light-emitting device for generating light beams, a reflector for collimating the light beams to a predetermined region, a light integrator positioned on the predetermined region and a brightness-adjusting module for adjusting the output brightness of the projector by changin...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	CHENG, WENIN, CHANG, HANUNG
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 CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHOTOGRAPHY PHYSICS
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Beschreibung
Zusammenfassung:	A projector comprises a light-emitting device for generating light beams, a reflector for collimating the light beams to a predetermined region, a light integrator positioned on the predetermined region and a brightness-adjusting module for adjusting the output brightness of the projector by changing the relative distance between the reflector and the light integrator. Preferably, the reflector is an elliptical reflector having two focuses, the light-emitting device is positioned on one of the two focuses and the other focus is laid in the predetermined region. The present method for adjusting the brightness of a projector is characterized in adjusting the relative distance between the light integrator and the reflector to adjusting the output brightness of the projector.