Here goes one more myth, the costlier the device better the quality. I have heard from so many of my friends how sony Displays are better than samsung and others and despite the fact both displays are manufactured together. But now after Sony has sold its stake in the joint venture S-lcd with Samsung, the concept of Sony's display is no more.
Sony was forced to sell its stake after many years of losses in its LCD tv business. The future looks bleak for Sony branded TV and Sony might just use the brand name while outsourcing parts from South Korean neighbors like Samsung and lg.
From wiki : S-LCD, as of April 25 2008, operated with a monthly production capacity of 100,000 seventh-generation amorphous silicon (a-Si) panels and 50,000 eighth-generation panels based on PVA technology, which are integrated into both Samsung Electronics and Sony LCD televisions and mobile phones.