US Patent 9129347 Display screen having regions of differing pixel density

A display device including: a display screen having first region and second region, the first region having a first pixel density and the second region having a second pixel density, the second pixel density being higher than the first pixel density, an input for receiving image data, a power source; and wherein the display screen is operable in a full screen mode in which an image is displayed in both the first region and the second region and a reduced screen mode in which power to the first region is turned off and the image is displayed in the second region.