Light guide device and backlight module using the same
US7206491B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 18, 2005 |
| Grant date | Apr 17, 2007 |
| Priority date | — |
| Expiry date | Aug 18, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S385/901
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light guide device (60) and a backlight module using the same. The light guide device includes: an incident surface (61); an emitting surface (64) adjacent to the incident surface; a reflecting surface (62) opposited to the emitting surface; a plurality of first V-shaped structures (644) formed on the emitting surface; and a plurality of second V-shaped structures (622) formed on the reflecting surface and perpendicular to the first V-shaped structures, wherein respective heigths of the second V-shaped structures increase with increasing distance from the incident surface and respective distances between adjacent second V-shaped structures decrease with increasing distance from the incident surface. The light guide device of the present invention does not need optical elements, and thus has a simple structure. A backlight module using the same light guide plate is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.