Light emitting device, surface illuminant, and display device
US8794777B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2009 |
| Grant date | Aug 5, 2014 |
| Priority date | — |
| Expiry date | Aug 8, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/853
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light emitting device includes: a substrate; a semiconductor light emitting element provided on the substrate; a sealing member which covers the semiconductor light emitting element; and a lens having a plurality of convex parts and a concave part. The light emitting device emits light having a non-concentric luminance distribution made up of a plurality of bright regions and a plurality of dark regions, the non-concentric luminance distribution being observed on a plane which is parallel to the substrate. This makes it possible to provide (i) a display device which has a thin body and hardly causes unevenness in luminance and in chromaticity, and (ii) a light emitting device and (iii) a surface illuminant suitable, which are suitable for use in the display device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.