The pieces are falling into place about Panasonic and Sony’s OLED collaboration. At CES 2013, they exhibited a 56" 4K OLED TV and Taiwanese AU Optronics now confirms that they have been involved in the development of the OLED panel.
Sony, Panasonic & AUO develop OLED
Sony and Panasonic's 56" 4K OLED TVs were very impressive - but they received a little help from outside.
Taiwanese AU Optronics is one of the largest display panel manufacturers but is unknown to most people as they do not sell actual TV but only produces the display panels. Taiwanese AU Optronics – or AUO – confirms in an official press release that the “OLED panel” was “jointly developed with Sony”.

AUO has contributed to Panasonic and Sony’s OLED-TV
Curiously, Panasonic was not mentioned in AUO’s press release but Panasonic and Sony have already confirmed that the collaboration on OLED technology and the 56” 4K OLED-TV. No other details were shared by AU Optronics.
We reported on the first rumors on a Sony and AUO collaboration in March 2012. The question is if the trio can keep up with LG and Samsung’s OLED roll-out. Samsung and LG exhibited the first OLED-TVs exactly one year ago but have yet to launch in significant quantities. Samsung is the largest OLED manufacturer today, based on its OLED production for mobile devices.