Light emitting device and light irradiation apparatus including the same
US10293369B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2017 |
| Grant date | May 21, 2019 |
| Priority date | — |
| Expiry date | Dec 27, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/855
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light emitting device is provided which includes a printed board, light emitting elements, and a light-transmissive member. The light emitting elements are arranged in three or more rows, and mounted on the printed board. The light-transmissive member includes three or more semi-semi-cylindrical lens portions that are arranged side by side transversely to cover the three or more rows. The heights of the tops of the semi-cylindrical lens portions are substantially equal to each other. The semi-cylindrical lens portions include first semi-cylindrical lens portions which are arranged to cover at least the both end rows, and a second semi-cylindrical lens portion which is arranged on the interior sides relative to the first semi-cylindrical lens portions in the transverse direction. The radius of curvature of the second semi-cylindrical lens portion is smaller than the first semi-cylindrical lens portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.