Abstract: An electromagnetic display apparatus includes a panel having substantially square pixel, which are divided into two parts. Each pixel is provided with a rotatably-mounted, bistable tilting flap, which is asymmetrical in relation to its rotational axis. The tilting flap covers one of the two portions of the panel surface in the pixel zone when the flap lies in each of its two stable positions. The side of the tilting flap facing the front side of the panel and the portion of the panel in the pixel zone, which is covered by the tilting flap and the other portion of the panel in the pixel zone has a second color. A permanent magnet is fitted to the tilting flap in close proximity to the rotational axis. The tilting flap is displaced from a first position into a second position by an electromagnet, which is located on the reverse side of the panel and is allocated to the pixels and which has a coil body and core.
Type:
Grant
Filed:
May 22, 2001
Date of Patent:
August 5, 2003
Assignee:
Annex Anzeignsysteme GmbH
Inventors:
Helmut Fischer, Wolfgang Kögler, Rudolf Pongratz