Patent ID: 8310409

Claim:
A display apparatus comprising: a double faced screen which receives light rays to display moving images, corresponding to the light rays, independently on two faces; driving means for rotating the screen around or on a predetermined rotational axis thereof; and irradiating means for irradiating the screen with the light rays, corresponding to the images, from various directions; wherein the screen comprises: a blocking plate; two diffusing plates, formed on the blocking plate to sandwich the blocking plate therebetween, each diffusing plate for diffusing and displaying the light rays received from the irradiating means; and two optical filter films, each formed on one of the diffusing plates, each optical filter film having a flat top surface and an internal structure of multiple fine rectangular film components fixedly formed along a vertical direction of the screen parallel to the rotational axis to form slits, a direction of the slits being a forward direction which is perpendicular to the flat top surface of the optical filter film, the slits (a) directly transmits the light rays traveling only in the forward direction from the irradiating means to the diffusing plate, and (b) blocks the diffused light rays from the diffusing plate not transmitted in the forward direction by reducing light intensity of the light rays, wherein an image of an object is viewed by a user as if the object is seen by an image taking unit only when (1) a corresponding irradiating means is in front of one of the display faces of the screen and (2) the user is positioned at the forward direction of that display face.