Transflective film and display

Details Transflective film and display Transflective film and display

2005-12-06

2005-12-06

Nguyen, Dung T. (Department: 2871)

Liquid crystal cells, elements and systems

Liquid crystal optical element

Liquid crystal lenses other than for eyewear

C349S114000, C349S201000

Reexamination Certificate

active

06972827

ABSTRACT:
A transflective optical film reflects ambient light incident on the first surface and transmits light having a preferred polarization state incident on the opposite surface. The film has a substrate wherein a plurality of tapered cavities extends from a first surface of the substrate toward an opposite surface, the tapered cavities narrowing toward the opposite surface, and a filler material deposited within each the tapered cavity. A reflective layer is deposited on the filler material in each tapered cavity, along the first surface of the substrate. At least one of the substrate and the filler material is birefringent such that for a preferred polarization state, the refractive index of the filler is substantially lower than the refractive index of the substrate and that, for the polarization state orthogonal to the preferred polarization state, the refractive index of the filler is substantially the same as the refractive index of the substrate.

REFERENCES:
patent: 4729640 (1988-03-01), Sakata
patent: 5299037 (1994-03-01), Sakata
patent: 5477351 (1995-12-01), Takahara et al.
patent: 5486940 (1996-01-01), Fergason et al.
patent: 5648859 (1997-07-01), Hirabayashi et al.
patent: 6292240 (2001-09-01), Kamiya et al.
patent: 6473220 (2002-10-01), Clikeman et al.

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