BigPatents India

A device comprising, a plane display board of any shape comprising three distinctive media (i) a first medium also called light directing medium, with the refractive index nl, (ii) a second medium also called light incident medium with an index of refraction n2,(iii) a third medium filling the void formed by the information laid on the convex surface of the light directing medium, (iv) an in-house light source and (v) a power supply for the light source.