| 摘要 |
An optical projection system for use in advertising in a retail establishment having a housing (20), preferably provided with a mounting device (18) for mounting the housing in overhead space in the retail establishment. An object generating module (28) for projecting an image of an object and a relay module (30) are positioned within the housing. The relay module is arranged to project a real image (26) of the object at a position outside of and spaced from the housing. This real image is arranged to be visible only within a limited area adjacent the housing and at a limited angle of view. The projection system is preferably equipped with one or more loudspeakers and may include a customer input device, such as a touch panel, for changing the real input depending upon the input. A plurality of such optical projection systems may be networked to communicate with a central server and one another for sharing, updating, and controlling applications and data such as images or other advertising messages.
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