In October 2007,Sony introduced the world's first OLED TV - the XEL-1. This first model is a highly priced (~2,500$), small sized (11") Television - more of a commercial-prototype than anything else, Sony only made around a thousand units a month, and have stopped production since.
Back in May 2008, Sony announced that they are working on a new TV. This one was supposed to be a 27" model, and Sony even showed us a prototype of that screen"
But the XEL-2 never saw the light of day, and in fact Sony pulled out of the OLED TV business in 2013.
Later in 2017 Sony re-entered the OLED TV market, with OLED TVs that adopt LG's WOLED panels.