TechOn reports that OLED displays are being tested in Japan train stations, for advertisements. They are using CMEL's 7.6 OLED panels (like the ones used in Kodak's photo frame). 

OLED Digital signageOLED Digital signage

Previously they have tested ads using e-Paper displays, but the OLEDs are cheaper than the custom-fit ePapers.

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Kyulux - Hyperfluoresence OLED emittersKyulux - Hyperfluoresence OLED emitters