| http://www.w3.org/ns/prov#value | - The image display apparatus of this type is constructed to enlargingly project an image formed by an image forming device such as a liquid crystal panel or the like, through a projection lens (projection optical system) onto the backface of the screen (which is a surface on the far side from the user with respect to the screen) and to permit an observer to observe the transmitted image on the othe
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