Japanese TV makers are desperately seeking new strategies to revive their flagging operations, and some of the key points include expanding screen sizes, boosting image quality and making them "smarter" and more user-friendly.

With midsize televisions barely turning a profit, the nation's electronics giants are banking on large-screen TVs and so-called 4K, or ultrahigh-definition, models. A 4K panel has four times as many pixels compared with the full high-definition HD panels installed in many of the current TVs.

While pursuing image quality, makers are also trying to enhance user friendliness by making TVs "smarter," by connecting them to the Internet, smartphones and tablet devices so users can access their preferred content more conveniently.