Light emitting device, light irradiation device including the light emitting device, and light emitting unit
US10683987B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2017 |
| Grant date | Jun 16, 2020 |
| Priority date | — |
| Expiry date | Apr 27, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B3/005
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light emitting device includes a substrate, a plurality of light emitting elements arranged in three or more rows on the substrate, and a light-transmissive member including a cylindrical lens portion having an array of three or more cylindrical lenses arranged parallel to each other along the rows of the light emitting elements so that each of the cylindrical lenses is on one of the three or more rows of light emitting elements. The rows of the light emitting elements are arranged with substantially uniform intervals. The cylindrical lens portion includes first cylindrical lens portions including at least cylindrical lenses at outermost sides of the array, and a second cylindrical lens portion arranged at an inner side of the first cylindrical lens portions and having a height greatest in the cylindrical lens portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.