Verfahren zur Projektion eines durch Anwendung von Flüssigkristallanzeigen erhaltenen Bildes und Anzeigevorrichtung zur Durchführung des Verfahrens

摘要

In a projection-type display apparatus using light scattering type liquid crystal devices (15), light from a light source (11) is reflected by a reflecting mirror (12) through a collecting lens (13); reflected light is converted by a lens (16) into a parallel light beam, which is injected into liquid crystal devices (15) disposed on three sides through a dichroic mirror (14), the liquid crystal devices coloring an image in red, green and blue; the image is projected on a screen through again the dichroic mirror (14), the collecting lens (16) and an enlarging lens (17). Further a photodetector (1704) is disposed at a focal point of the collecting lens (16) and a function of adjusting the position of the light source on the basis of a result of this detection is added.