Seiki, a low-cost TV brand owned by China's THTF Global, unveiled a large flat OLED TV prototype at IFA 2013. That's the only information I besides this photo below:

I do not know who made this panel, it's likely that it is LG Display (that was also my bet for the Haier OLED TV prototype). We know that LGD are interested in supplying OLED panels to other companies (besides LG Electronics) - or at least that was true for the beginning of 2013 when the company's CEO said that the company is in talks with Japanese TV makers for the supply of panels.

Kyulux - Hyperfluoresence OLED emittersKyulux - Hyperfluoresence OLED emitters