Directional reflector for a liquid crystal display device and indenter adapted to manufacture the same

摘要

Two dimensional directed reflector (30) for liquid crystal displays. Reflected beams in one or two directions exhibit a non-Gaussian profile and have a maximum in their reflectance at angles smaller than that corresponding to specular reflection (fig. 8b). This is achieved by utilizing a two dimensional array of concave notches (34) which are asymmetric. In one variant the notches consist of a concave surface (34e) with two flat surfaces (34f,34g) and in other variant a ring-shaped section of a cone (534f) surrounds the deepest part of the cavity (D). An intender (78) to manufacture the notches is also disclosed.