Control of liquid crystal alignment in an optical device

Details Control of liquid crystal alignment in an optical device Control of liquid crystal alignment in an optical device

2008-05-20

2008-05-20

Schechter, Andrew (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

C349S130000, C349S132000, C349S193000, C349S200000

Reexamination Certificate

active

07375784

ABSTRACT:
A method is provided that allows simultaneous control of macroscopic azimuthal and zenithal liquid crystal alignment (φ, θ) across a liquid crystal layer by controlling the area ratios between first, second and third different types of alignment region (T1, T2, T3) in a patterned alignment layer, the three different types of alignment region (T1, T2, T3) tending to induce liquid crystal alignment in the liquid crystal layer in three different respective, non-coplanar, principal orientations (z, x, y). In the illustrated example, the first type of alignment region (T1) tends to induce substantially homeotropic alignment (in the z direction) and the second and third types of alignment region (T2, T3) tend to induce substantially planar alignment in different, orthogonal, principal orientations (in the x and y directions). Control of macroscopic zenithal liquid crystal alignment (θ) is achieved by controlling the area ratios between the homeotropic (T1) and planar region types (T2, T3), and control of macroscopic azimuthal liquid crystal alignment (φ) is achieved by controlling the area ratio between the two planar region types (T2, T3).

REFERENCES:
patent: 4878742 (1989-11-01), Ohkubo et al.
patent: 5032009 (1991-07-01), Gibbons et al.
patent: 5446569 (1995-08-01), Iwai et al.
patent: 5652634 (1997-07-01), Hirata et al.
patent: 5825448 (1998-10-01), Bos et al.
patent: 5880798 (1999-03-01), Walton et al.
patent: 5903330 (1999-05-01), Funfschilling et al.
patent: 6798481 (2004-09-01), Kitson et al.
patent: 6989880 (2006-01-01), Takato et al.
patent: 2001/0005249 (2001-06-01), Stebler et al.
patent: 768562 (1997-04-01), None
patent: 1 139 153 (2001-10-01), None
patent: 2 023 866 (1980-01-01), None
patent: 63014123 (1988-01-01), None
UK Patent Office Search Report for Application No. GB0405165.2.
English translation of Chinese Office Action dated Apr. 2007, for Chinese Application No. 200510078303.6.

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