substantially normal to said sensor regardless of said angle of incidence the display assembly can further comprise a substrate said textured surface applied to said substrate said substrate for mechanically affixing said wave guide to said window the substrate can be affixed via an adhesive the geometric structure can be further configured according to a material and thickness of said substrate the textured surface can be made from one of polymethyl methacrylate polyethylene terephthalate acrylic or epoxy the wave guide can be made from a material having a refractive index of between about 1 4 and about 1 7 the light sensor module can further comprise a light emitter configured to emit light at a first angle said wave guide configured to scatter light emitted from said light emitter out of said window at angle wider than said first angle the display assembly can be configured for incorporation into a portable electronic device and said light emitter is configured to indicate a status of said portable electronic device another aspect of the specification provides a light sensor module according to any of the foregoing another aspect of the specification provides a wave guide according to any of the foregoing referring now to fig1 a display assembly is indicated generally at 50 display assembly 50 comprises a display 54 a light sensor module 58 and a controller 62 display assembly 50 can be incorporated into any electronic apparatus having a display including but not limited to portable electronic devices computers televisions cellular telephones desktop telephones and major appliances display 54 comprises one or more light emitters such as an array of light emitting diodes led liquid crystals plasma cells or organic light emitting diodes oled other types of light emitters.