Light emitting device with microlens array
US7535646B2 · kind B2 · utility
29Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2007 |
| Grant date | May 19, 2009 |
| Priority date | — |
| Expiry date | Apr 30, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2011/0016
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A light-emitting device, comprising: a light emitting element on a first side of a transparent substrate or cover through which light is emitted; and a microlens array on a second side, opposite to the first side, of the transparent substrate or cover though which light is emitted; wherein the microlens array comprises individual hemispherical shaped microlenses having a mean diameter of less than 20 micrometers and a mean microlens height to diameter ratio of greater than 0.30, and has a microlens area fill factor greater than 0.8.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.