See below an image of theW61H phone handset manufactured by Hitachi Ltd, which uses e-paper as the back panel. The e-paper has a screen size about the same as that of a 2.7-inch display.
The users can select an image to be displayed on the e-paper from the total of 95 patterns including animations as well as still images. When the phone receives a call, sends/receives e-mail or sounds an alarm, the users can enjoy watching the image change on the back panel, in addition to the standby screen.
Just a small step from there to e-paper wall paper at home....
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