The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 02, 2014
Filed:
Oct. 26, 2007
Jonathan Paul Hannington, Midland, MI (US);
Terry Victor Clapp, Bishop's Stortford, GB;
Fumito Nishida, Midland, MI (US);
Russel Keith King, Midland, MI (US);
Omar Farooq, Saginaw, MI (US);
Martin Grasmann, Midland, MI (US);
William Alden Crossland, Harlow, GB;
Harry James Coles, Sutton Ely, GB;
Anthony Bernard Davey, Cambridge, GB;
Huan Xu, Cambridge, GB;
Oliver Hadeler, Cambridge, GB;
Mykhaylo Pivnenko, Cambridge, GB;
Jonathan Paul Hannington, Midland, MI (US);
Terry Victor Clapp, Bishop's Stortford, GB;
Fumito Nishida, Midland, MI (US);
Russel Keith King, Midland, MI (US);
Omar Farooq, Saginaw, MI (US);
Martin Grasmann, Midland, MI (US);
William Alden Crossland, Harlow, GB;
Harry James Coles, Sutton Ely, GB;
Anthony Bernard Davey, Cambridge, GB;
Huan Xu, Cambridge, GB;
Oliver Hadeler, Cambridge, GB;
Mykhaylo Pivnenko, Cambridge, GB;
Dow Corning Corporation, Midland, MI (US);
Cambridge Enterprise Ltd., Cambridge, GB;
Abstract
A liquid crystal formulation is described. The liquid crystal formulation comprises a first oligosiloxane-modified nano-phase segregating liquid crystalline material; and at least one additional material selected from a second oligosiloxane-modified nano-phase segregating liquid crystalline material, non-liquid crystalline oligosiloxane-modified materials, organic liquid crystalline materials, or non-liquid crystalline materials, wherein the liquid crystal formulation has an I→SmA*→SmC* phase transition, with a SmC* temperature range from about 15° C. to about 35° C., a tilt angle of about 22.5°±6° or about 45°±6°, a spontaneous polarization of less than about 50 nC/cm2., and a rotational viscosity of less than about 600 cP. Devices containing liquid crystal formulations are also described. The device has a stable bookshelf geometry, bistable switching, and isothermal electric field alignment, a response time of less than 500 μs when switched between two stable states, and an electric drive field of less than about 30 V/μm.