Polarization conversion element, polarized light...

Details Polarization conversion element, polarized light... Polarization conversion element, polarized light...

2009-05-29

2011-10-04

Doan, Jennifer (Department: 2874)

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Electrical excitation of liquid crystal

C349S019000, C349S033000, C349S054000, C349S061000

Reexamination Certificate

active

08031288

ABSTRACT:
A prism sheet is bonded to the bottom faces of rectangular prisms constituting a polarization beam splitter array. In the front face of the prism sheet, a plurality of rectangular prism elements are arranged in parallel to each other and a phase difference compensation film is formed on the surface. The edge lines of the rectangular prism elements are inclined at 45 degrees relative to the edge lines of the rectangular prisms. Linear polarized light of S-polarization component reflected by a polarized light separation film is reflected twice sequentially in a phase difference compensation film formed in a pair of oblique faces of the rectangular prism elements, so that the polarization direction is rotated by 90 degrees and then the light reenters the rectangular prism. Then, the light is transmitted through the polarized light separation film and then extracted from the rectangular prism.

REFERENCES:
patent: 6364489 (2002-04-01), Eguchi
patent: 7086743 (2006-08-01), Yamakawa
patent: 2006/0221592 (2006-10-01), Nada et al.
patent: 2001-235624 (2001-08-01), None

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