Surface light source device and LCD unit
US8368842B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2009 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | Nov 3, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133314
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The disclosed subject matter includes providing a surface light source device with high brightness that can emit light from both surfaces and an LCD unit having the same qualities. The surface light device can include a light guide having a light incoming surface, a reflecting sheet located adjacent the light guide, a transparent sheet having a light incoming surface located adjacent the reflecting sheet and a light source located toward both light incoming surfaces. Light emitted from the light source can be configured to enter into the light guide and the transparent sheet via the light incoming surfaces. The light can be efficiently emitted in both directions from the light guide and the transparent sheet using the reflecting sheet. Therefore, an LCD unit that includes an LCD located adjacent the light guide and a second display located adjacent the transparent sheet can illuminate displays with higher brightness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.