Patent ID: 8378963
Filing Date: 2013-02-19
Classification: G02F,G09G

Abstract:
1. An electronic device comprising: a display including a transparent substrate having a rectangular active display area and an inactive display area surrounding the rectangular active display area; a photosensor on a portion of the inactive display area of the transparent substrate outside the rectangular active display area wherein the photosensor comprises a photoconductive material having an electrical resistance that varies with varying light intensities thereon and wherein a current path through the photosensor is parallel with respect to a surface of the transparent substrate wherein the photosensor has a continuous length of the current path that is at least about half of a length of a side of the rectangular active display area of the transparent substrate; a light configured to provide illumination for the electronic device; and a controller coupled to the photosensor and the light, the controller being configured to vary an intensity of the illumination from the light responsive to variations in the electrical resistance of the photoconductive material.