Patent ID: 11940120
Assignee: NITTO DENKO CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  G | IPC F

Claim 11:
12. The desktop illumination device according to claim 1, wherein the light guide includes a low refractive index layer on either the first main surface or the second main surface, the low refractive index layer having a lower refractive index than a refractive index of the light guide plate,
wherein the light guide includes a light extractor that is different from the low refractive index layer and is configured to cause the light propagating through the light guide plate to be emitted from the first main surface with the light distribution, and
wherein the light extractor includes one or more voids provided in the light guide plate, and the one or more voids are configured to totally reflect the light propagating through the light guide plate and cause the light to be emitted from the first main surface with the light distribution.