Direct type backlight module
US7413318B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2006 |
| Grant date | Aug 19, 2008 |
| Priority date | — |
| Expiry date | Apr 26, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133628
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A direct type backlight module (200) includes a substrate (231), a diffusion sheet (24) disposed above the substrate, a plurality of spacers (21) and a plurality of light sources (22). The spacers are disposed between the substrate and the diffusion sheet. Each spacer includes a bottom surface (211) contacting with the substrate. A groove (2114) is defined in the bottom surface, and a light incident surface (2112) is defined on inner surface of the groove. A pair of wings is disposed on two sides of the bottom surface for supporting the diffusion sheet. Each wing includes an outer side surface and an inner side surface, and a transflective film is formed on the inner side surfaces of the wing. The light sources are respectively disposed in the grooves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.