Direct type backlight unit and liquid crystal display device using the same
US8777438B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 2012 |
| Grant date | Jul 15, 2014 |
| Priority date | — |
| Expiry date | Aug 22, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133611
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A direct type backlight unit includes an optical film, a diffusion plate for supporting the optical film, a bottom plate disposed under the diffusion plate, a plurality of light emitted diodes disposed between the diffusion plate and the bottom plate, and a plurality of support structures disposed between the diffusion plate and the bottom plate and fixed on the bottom plate, wherein each support structure is disposed between two adjacent light emitting diodes, a height of each support structure is smaller than a distance between the bottom plate and the diffusion plate. The direct type backlight unit can improve the problem that a dark area occurs on the diffusion plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.