InfoWorld: Commuters in Tokyo are getting a chance to experience some cutting-edge display technology. On three commuter trains some traditional paper advertisements have been replaced with color e-paper displays. The 13.1-inch displays are made by Hitachi Ltd. and based on Bridgestone Corp.'s "electronic liquid powder" technology. There are two such displays on each of the three trains, mounted on the carriage wall at either end of the train. Each display is connected to a smaller unit that contains companion electronics and an 8MB memory module that can hold 37 advertisements. Each advertisement is shown for two minutes in a continuous cycle.
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