G - Physics
09
F
G09F 19/22 (2006.01) B66B 3/00 (2006.01) B66B 31/00 (2006.01) B66C 1/34 (2006.01) G02B 27/18 (2006.01) G09F 19/18 (2006.01)
Patent
CA 2313916
The invention relates to a lift installation with at least one lift cage (1) and a lift door (2, 3), wherein the lift door (2, 3) is constructed as a display surface (5), especially as a projection surface, for the representation of items of information of general kind. The lift door consists of a cage door (2) and a shaft door (3). An image is projected onto the shaft door (3) by a projector (4); a part of the surface of the shaft door (3) thus serves as a projection surface. The projector (4) is positioned in the vicinity of the ceiling (7) of a storey in front of the shaft access. The apparatus (4) is preferably mounted as close as possible, in compact manner, to the projection surface. Through a special optical system and a computer-assisted image distortion an image of good quality is produced even in the case of an extremely oblique projection at a small angle w. The observer of the information can stand at a spacing of about one metre in front of the projection surface without disturbing the projection.
Richter Lutz
Svensson-Hilford Lennart
Ag Inventio
Riches Mckenzie & Herbert Llp
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