Patent ID: 11971569
Assignee: DEXERIALS CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G | IPC F  G

Claim 0:
1. An optical body comprising:
a base material;
a macro concave-convex structure that is formed on one surface of the base material and emits internally propagating light that is injected in an inside of the base material from a side surface of the base material, from another surface of the base material; and
a micro concave-convex structure formed periodically to follow each of both surfaces of the base material and a surface of the macro concave-convex structure, and having an average period of concavity and convexity of less than or equal to a wavelength of visible light,
wherein the surface of the macro concave-convex structure has an inclined surface that is inclined with respect to the one surface by more than or equal to 30° and less than 90°, and
in a plan view on the one surface of the base material and the another surface of the base material, respectively, an arrangement of the micro concave-convex structure is a pattern with respect to a traveling direction of internally propagating light,
wherein the pattern comprises a first row of micro concave-convex structures and a second row of micro concave-convex structures;
the first and the second row are arranged parallel and adjacent to each other and parallel with respect to the traveling direction of internally propagating light;
a track pitch between the first row and the second row, which is a distance, perpendicular to a length direction of the first row and the second row, between centers of the micro concave-convex structures in the first row and the second row, is less than or equal to a wavelength of visible light; and
the micro concave-convex structures in the first row and the second row are mutually shifted in the length direction of each row by half a dot pitch, where the dot pitch is a distance between centers of adjacent micro concave-convex structures in a same row,
wherein, in a plan view on the one surface of the base material and the another surface of the base material, respectively, an angle between an arrangement direction of the micro concave-convex structure and a direction perpendicular to a propagation direction of the internally propagating light is 30 to 60°.