Patent ID: 8994695
Filing Date: 2015-03-31
Classification: G06F

Abstract:
1. A touch sensitive display, comprising: a display layer; a transparent layer disposed over the display layer, wherein the transparent layer comprises a top surface and a bottom surface that are approximately parallel, and at least four edge surfaces; at least one source adjacent to each edge surface directing light to propagate into and through a majority of the transparent layer via the edge surface of the transparent layer; at least one light sensing element adjacent to each edge surface and in contact with the transparent layer and operating to receive scattered light in response to an object touching the top surface of the transparent layer and disturbing the propagation through the transparent layer of the light from a source adjacent to the same edge surface as the light sensing element; and a control circuit including a processor receiving signals from the at least one light sensing element indicative of the scattered light, and computing one or more positions at which the object touches the transparent layer wherein each edge surface of the transparent layer and at least part of the top surface and bottom surface of the transparent layer adjacent the edge surfaces comprises a light reduction mechanism.