LIQUID CRYSTAL DISPLAY AND REFLECTIVE DIFFUSER THEREFOR

摘要

A diffuser for backlighting a display panel consists of a shell having a flat surface for positioning against the backside of the panel. A reflection cavity extending into the shell from the flat surface has highly reflective walls one of which opposite the mouth of the cavity defines a ramp. An illumination cavity extending into the shell intercepts the reflection cavity at an aperture near the foot of the ramp. When light propagates from the illumination cavity into the reflection cavity, the walls of the latter cavity distribute that light by reflection and the ramp redirects that light to the mouth of the reflection cavity from which the light propagates to the display panel as a uniform diffuse emanation.