A planar light source comprises at least one point light source disposed on a supporting substrate, and a cylindrical lens that covers the light emitting observation side of the point light source, wherein the cylindrical lens has a concave lens function in the direction (y direction) perpendicular to the supporting substrate, and has a convex lens function in at least part of the horizontal direction (x direction).

Web www.patentalert.com

< Method of forming a lamp assembly

> Lighting apparatus for illumination of removable frame sign

~ 00460