| 摘要 |
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. |
