초록 ▼

A light beam polarization converter for converting non-polarized light beams of an illumination source into a single polarization state, which may be utilized in various electro-optical devices, such as liquid crystal projection type televisions. A polarization splitter film and a phase retardation

A light beam polarization converter for converting non-polarized light beams of an illumination source into a single polarization state, which may be utilized in various electro-optical devices, such as liquid crystal projection type televisions. A polarization splitter film and a phase retardation film are utilized to make the incident light beams of a light source focused and refracted with an under plate. The light beam, upon passing through the under plate, goes through a series of optical processes of polarization splitting, reflection, total reflection and phase retardation, and subsequently becomes a light beam of a single polarization state output.

대표청구항 ▼

1. A light beam polarization converter for converting an illumination light source into a polarization light source, comprisingan under plate having an undulated lower surface and a ridged upper surface; a substrate having a ridged lower surface, substantially complementary to the upper surface of t

1. A light beam polarization converter for converting an illumination light source into a polarization light source, comprisingan under plate having an undulated lower surface and a ridged upper surface; a substrate having a ridged lower surface, substantially complementary to the upper surface of the under plate and facing therewith, and a ridged upper surface; a phase retardation film of high reflectivity provided partially between the substrate and the under plate; a top cover having a lower surface, substantially complementary to the upper surface of the substrate and facing therewith, and an upper surface; and a polarization splitter film provided between the substrate and the top cover.