Light diffuser and illuminating ceiling display

Claim 1

In combination with a suspended ceiling having generally rectangular ceiling tiles supported on a framework of mutually perpendicular support bars having a horizontal flange portion, one or more light sources disposed above the plane of the support bars at one or more spaced locations, at least one of said ceiling tiles below said light sources being removed for environmental illumination of the area in which the suspended ceiling is located, a visual display and a light diffuser for said area comprising an integral hollow body of translucent sheet material, said body having an upward opening, an outwardly extending annular rim portion dimensioned to supportively engage said support bars arranged about the periphery of one of said light sources, said body with the exception of said upward opening being continuous and wholly enclosing the illumination from said light source, said body diffusing said illumination and having a visual display thereon which is illuminated by said light source, said body is a thermoformed synthetic plastic material which is resiliently flexible enabling substantial flexure of said body and in which said rim portion is severable to reduce its width, said translucent body includes side wall portions which extend downwardly a substantial distance from said rim portion one of said side wall portions being inclined toward the other, said visual display being disposed on at least one of said side wall portions, said rim portion before being severed is of a width substantially greater than the horizontal flange portion of the support bars of said suspended ceiling.