Projector
US6729730B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 17, 2002 |
| Grant date | May 4, 2004 |
| Priority date | — |
| Expiry date | Jul 17, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13362
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projector is provided which can realize a bright projected image of high light utilization efficiency while combining a reflective-type liquid crystal device and an integrator optical system. The projector may include a light source lamp, a light beam dividing optical element, a polarization conversion element, a polarization selection element having a polarization selection surface, and an electro-optical device. When a plane of incidence including a normal line of the polarization selection surface and the central axis of an incident light is assumed, the direction parallel to the plane of incidence and perpendicularly intersecting the central axis is assumed to be the X-axis direction, and the direction perpendicularly intersecting the plane of incidence is assumed to be the Y-axis direction, the direction of polarization beam separation by the polarization conversion element is the X-axis direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.