The Sony LiveView is an Android accessory - it has a small (1.3") PMOLED display and can communicate via Android 2.x devices. You can control music, get notifications about phone calls, updates from applications (twitter, facebook) and more. The idea is that you can wear it like a watch.

SonyEricsson LiveView photo

The LiveView price was $35.

OLED type: 

1.3" color PMOLED

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Kyulux - Hyperfluoresence OLED emittersKyulux - Hyperfluoresence OLED emitters