Japan Display joins the Quad HD phone screen party with 54 and 62inch LCDs

LG clearly doesn't have a monopoly on Quad HD smartphone screens -- Japan Display has unveiled two low-temperature polysilicon (LTPS) LCDs that offer the extra-sharp 2,560 x 1,440 resolution. The headlining 5.4-inch panel is ever so slightly denser than its Korean equivalent, at 543ppi; there's also a 6.2-inch (473ppi) model for giant devices. Both LCDs have "dead-bands" that are just 1mm thick, which should lead to extra-slim bezels on finished products. Japan Display hasn't said which companies will use the Quad HD screens, but it's easy to see one of the joint venture's partners (Hitachi, Sony or Toshiba) calling first dibs.