Polarized light source system comprising meshing prism plates and liquid crystal display using the same
US7046318B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2003 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | Apr 13, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13362
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A polarized light source system (20) includes a light guide plate (22), a light source (24), a lamp cover (25), a quarter wave plate (23), an upward prism plate (26) and a downward prism plate (28). The light guide plate defines an optical inputting surface and an optical outputting surface interconnecting therewith. The light source and the lamp cover are stationed next to the optical inputting surface. The upward prism plate stationed next to the optical outputting surface defines a plurality of upward micro-prisms (262) on a surface opposite thereto. The downward prism plate stationed next to the upward prism plate includes a brightness enhancing film (284), and a plurality of downward micro-prisms (282) on a surface facing the upward prism plate. The upward and downward micro-prisms engaged with each other. The quarter wave plate includes a reflective film on a backing surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.