Osram Opto Semiconductors
Osram's booth featured an extensive OLED installation designed by LichtKunstLicht, and incorporating hundreds of Orbeos OLED modules - see the Osram press release and the following video:
NEDO
In a booth named "OLED Japan", the New Energy and Industrial Technology Development Organization (NEDO) showcased energy-efficient OLED lighting technology, including products from Panasonic Electric Works and NEC Lighting, as shown in the video below: