Light-leading panel for surface lightening and a surface-lightening body.

摘要

A new compact surface-lightening body having homogeneous luminosity and high light intensity which is useful for electronic devices such as tablet-type television, lap-top personal computer or word processor with liquid crystal can be obtained by disposing at the one face of a light leading-panel which is solid or hollow optically transparent material (2) and having a symmetric concavity preferably selected from a circular arc or a parabolic arc, or symmetric concave-plane synthesized from said concave face and two planes tangentially adjoined thereto, said synthesized face being tangent to any point on the slants each other,of same shape and size but symmetrically confronting two rectangular triangles at their acute apexes and lying on a common basic line and they are confronting so as to contact with said slants at a distance not less than one-tenth of the length of each slant apart from the confronting point of the both triangles, and said panel provides with a light-reflecting layer (SR) at its one face and a light-scattering face (SE) at its other face, preferably with white dotting. <IMAGE>