A recently granted patent reveals that Apple, the company behind the iPod and iPhone, has been working on a new type of display screen that produces three dimensional and even holographic images without the need for glasses. The technology could be used to produce a new generation of televisions, computer monitors and cinema screens that would provide viewers with a more realistic experience. The system relies upon a special screen that is dotted with tiny pixel-sized domes that deflect images taken from slightly different angles into the right and left eye of the viewer.