Optical lens, light emitting device package using the optical lens, and backlight unit
US7602559B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 26, 2006 |
| Grant date | Oct 13, 2009 |
| Priority date | — |
| Expiry date | Jun 23, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133605
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical lens, a light emitting device package using the optical lens and a backlight unit are disclosed, whereby light irradiated upward of a light emitting device is refracted from a bottom refraction surface to allow reaching a reflection surface, and an optical lens is mounted for reflecting the light sideways of the lens from the reflection surface to minimize an amount of light irradiated upward of the lens while increasing the amount of light irradiated toward the lateral surface of the lens, thereby limiting the generation of a hot spot to the maximum. The present invention dispenses with a hot spot baffle plate and a complicated assembly process to enable to reduce the number of parts and to decrease the thickness of a panel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.