Patent ID: 11971570
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  F | IPC F

Claim 14:
15. A method of manufacturing a light diffuser including an incident surface to receive first light, a light scattering portion that includes light scattering particles present in a medium and generates scattered light by guiding the received first light and scattering the received first light with the light scattering particles, and an emission surface to emit the scattered light, the method comprising:
dispersing the light scattering particles in material for the medium to form a plurality of pre-light scattering portions of predetermined shape that each include light scattering particles in a medium and are different in at least one of concentration of the light scattering particles in the medium and length in a light guiding direction of the first light, wherein a concentration of the light scattering particles is discontinuous with distance from an incident edge in a light guiding direction of the first light; and
joining the plurality of pre-light scattering portions to form the light scattering portion,
wherein the light scattering particles are distributed to increase exponentially with the distance, and
wherein the light scattering particles are distributed to increase according to a fractional function.