Optical element and shelf lamp with the optical element
US11145225B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2020 |
| Grant date | Oct 12, 2021 |
| Priority date | — |
| Expiry date | Mar 31, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F2013/142
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An optical element includes a rectangular light guide plate, a light source setting portion, a parallel light lens group, and a total reflection lens group, disposed between the parallel light lens group and the first side surface, a part of the parallel light from the parallel light lens group is subjected to total reflection at least once to form a first parallel light parallel to the front surface, and the first parallel light enters the first side surface to make the second side surface emit light; another part of the parallel light from the parallel light lens group is totally reflected at least twice to form a second parallel light oblique to the front surface, and the second parallel light enters the first side surface to make the front surface emit light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.