Apple Inc is in talks to buy Japan-based Renesas Electronics Corp's stake in a unit that designs liquid crystal display chips for iPhones for about 50 billion yen ($483 million), the Nikkei reported, without identifying a source. Renesas owns 55 percent stake in Renesas SP Drivers, its joint venture with Sharp Corp and Taiwan's Powerchip. http://www.reuters.com/article/2014/04/01/apple-renesas-offer-idUSL4N0MT43D20140401