Optical device
US10139640B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2017 |
| Grant date | Nov 27, 2018 |
| Priority date | — |
| Expiry date | Sep 19, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B35/24
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical device includes a light guide plate configured to guide light within a plane parallel to an emission surface, and a plurality of light focusing portions to which the light guide plate guides directional light. Each of the plurality of light focusing portions is provided with an optical surface configured to create from the directional light incident thereon emission light in a direction substantially converging on a single convergence point or convergence line in a space or to create emission light that substantially diverges from a single convergence point of convergence line in a space and exits from the emission surface. The plurality of light focusing portions are provided near the emission surface of the light guide plate, and each of the plurality of light focusing portions is formed along a predetermined line within a plane parallel to the emission surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.