Method of making a lightguide

摘要

A method of making a lightguide that may be used as a backlight to illuminate a display comprises the steps of (a) providing a lightguide film (1) having upper and lower surfaces allowing substantial total internal reflection of light therebetween; (b) applying a viscous and curable resin material (18) at least to the lower surface in a pattern; (c) applying a surface texture to the material by embossing to create a variable thickness microstructured surface; and (d) curing the material, the resulting surface textured pattern (21) on the base of the lightguide being capable of extracting light from the lightguide.