Polarized-light-emitting waveguide, illumination arrangement...

Details Polarized-light-emitting waveguide, illumination arrangement... Polarized-light-emitting waveguide, illumination arrangement...

2006-04-11

2006-04-11

Ullah, Akm Enayet (Department: 2874)

Optical waveguides

Polarization without modulation

C385S146000, C385S901000, C362S019000

Reexamination Certificate

active

07027671

ABSTRACT:
A side-lit illumination arrangement comprises a polarized-light-emitting waveguide comprising a polarization-selective beam-splitting interface formed at an interface of a waveguiding layer and a polarization-selection layer. In order to avoid alignment problems occurring during the manufacture of the waveguide which impair the proper functioning of the polarization-selective beam-splitting interface, the polarization-selective beam-splitting interface is planar. Waveguided light polarized and transmitted by the polarization-selective beam-splitting interface into the polarization-selection layer is coupled out by a relief-structured surface via an exit surface. Display devices having such waveguides, in particular if used in a front light, have a high brightness and efficiency.

REFERENCES:
patent: 6335999 (2002-01-01), Winston et al.
patent: WO 97 11404 (1997-03-01), None
patent: WO 01 51849 (2001-07-01), None
patent: WO 01 53745 (2001-07-01), None

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