Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2007-11-06
2007-11-06
Ton, Toan (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S115000, C349S117000
Reexamination Certificate
active
11455747
ABSTRACT:
A component has a substrate (1) made of a transparent material, for example glass. On this layer (1), there is a linear polarizer (2) on which there is a layer (3) of a photo-oriented polymer network (PPN)(=LPP) which is oriented in locally varying fashion via its surface which covers the substrate. The layer (3) is adjoined by an anisotropic layer (4) of cross-linked liquid-crystal monomers. This layer (4) then has a molecular arrangement whose orientation is defined by the underlying orientation layer (3). The layer (4) will have been photocross-linked by exposure to a suitable wavelength of light, with the result that the molecular orientation defined by the PPN layer (3) is fixed. The element, denoted as a whole by 7, can then be used as an optical component which is protected against forgery, it being possible for the orientation pattern of the liquid-crystal layer or the optical information stored therein to be made visible by means of an external polarizer (5), for example.
REFERENCES:
patent: 4472627 (1984-09-01), Weinberger
patent: 4536014 (1985-08-01), Boutaleb et al.
patent: 5204763 (1993-04-01), Hikmet
patent: 5262882 (1993-11-01), Hikmet
patent: 5327271 (1994-07-01), Takeuchi et al.
patent: 5333074 (1994-07-01), Hikmet
patent: 5464669 (1995-11-01), Kang et al.
patent: 5548422 (1996-08-01), Conner et al.
patent: 5549953 (1996-08-01), Li
patent: 5589959 (1996-12-01), Hikmet
patent: 5602661 (1997-02-01), Schadt et al.
patent: 5678863 (1997-10-01), Knight et al.
patent: 6160597 (2000-12-01), Schadt et al.
patent: 6369869 (2002-04-01), Schadt et al.
patent: 6734936 (2004-05-01), Schadt et al.
patent: 0 347 063 (1989-12-01), None
patent: 0 611 981 (1994-08-01), None
patent: 0 689 065 (1995-12-01), None
patent: 0 689 084 (1995-12-01), None
patent: 0 753 785 (1996-07-01), None
patent: 0 768 560 (1997-04-01), None
patent: 0 770 889 (1997-05-01), None
patent: 2 286 058 (1995-08-01), None
patent: 09-068926 (1997-03-01), None
patent: 09-304770 (1997-11-01), None
patent: WO94/02329 (1994-02-01), None
Martin Schadt et al., “Photo-Generation of Linearly Polymerized Liquid Crystal Aligning Layers Comprising Novel, Integrated Optically Patterned Retarders and Color Filters,” Jpn. J. Appl. Phys., vol. 34 (1995), pp. 3240-3249, Part 1, No. 6A (Jun. 1995).
Martin Schadt et al., “Photo-Induced Alignment and Patterning of Hybrid Liquid Crystalline Polymer Films on Single Substrates,” Jpn. J. Appl. Phys., vol. 34 (1995), pp. L764-L767, Part 2, No. 6B (Jun. 1995).
International Search Report re. International Appln. No. PCT/1B98/00687, dated Jul. 22, 1998, 3 pages.
Office Action from U.S. Appl. No. 09/435,466, mailed Nov. 8, 2000, 5 pages.
Office Action from U.S. Appl. No. 09/435,466, mailed Oct. 11, 2001, 7 pages.
Office Action from U.S. Appl. No. 09/435,466, mailed Jul. 24, 2002, 16 pages.
Communication from European Patent Office re. Application No. 04010031.5-2217, dated Jul. 8, 2004, 5 pages.
Official Action from U.S. Appl. No. 09/435,466, mailed Jan. 27, 2003, 5 pages.
Official Action from U.S. Appl. No. 10/728,853, mailed Apr. 15, 2005, 7 pages.
Official Action from U.S. Appl. No. 10/728,853, dated Dec. 20, 2005, 8 pages.
Schadt Martin
Seiberle Hubert
Rolic Ltd c/o Rolic Technologies Ltd.
Sughrue Mion Pllc.
Ton Toan
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