Patent ID: 6259854
Filing Date: 2001-07-10
Classification: G02B,Y10S

Abstract:
An edge-light lightguide which guides light from at least one side end plane, comprising:a light emitting surface;a rear surface opposing said light emitting surface, said rear surface comprising a large number of approximately trapezoidal protrusions arranged in a pattern, said protrusions including an apex edge in the cross section perpendicular to the axis of a linear light source with an at least partially straight section, said aproximately trapezoidal protrusion pattern being a pattern of specks, solid-lines, or broken-lines, said pattern having a low am density in a region neighboring the at least one side end plane and having a high area density in a region removed from the at least one side end plane such that a luminance distribution of light emitted from the light emitting surface is approximately uniform.