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2.
  • Helgee, Bertil, et al. (författare)
  • Liquid crystal device and its manufacture
  • 2005
  • Patentabstract
    • The invention relates to a liq. crystal device comprising a liq. crystal bulk layer and a dynamic surface-director alignment layer, wherein the liq. crystal bulk layer comprises a liq. cryst. material possessing a phase sequence consisting of isotropic phase, nematic phase and optionally cryst. phase (s), and the surface-director alignment layer comprises a chiral smectic liq. cryst. polysiloxane. The invention also relates to a method for its manufg.
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3.
  • Komitov, Lachezar, 1944-, et al. (författare)
  • Electro-optical devices from polymer-stabilized liquid crystal molecules
  • 2005
  • Patentabstract
    • Electrooptical devices are described which comprise first and second spaced-apart surfaces defining a gap; a chiral or cholesteric liq. crystal material disposed in the gap; and a polymeric network disposed in the gap, the polymeric network being .ltorsim.5 wt. % of the liq. crystal and biasing the liq. crystal material toward a substantially uniformly lying helix texture. The polymeric network may extend only partway into the liq. crystal cell leaving at least a portion of the liq. crystal cell substantially free of the polymeric network. Methods for producing the devices are described which entail disposing a chiral or cholesteric liq. crystal, a photoreactive monomer, and a photoinitiator in a liq. crystal cell; and illuminating a principal surface of the liq. crystal cell with UV light selected to have a nonuniform intensity profile in the liq. crystal cell, the illuminating cooperating with the photoinitiator to polymerize at least a portion of the photoreactive monomer near the principal surface to generate a polymer network having a d. corresponding to the non-uniform a UV light intensity profile, the polymer network biasing the liq. crystal toward a selected helical alignment direction.
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5.
  • Komitov, Lachezar, 1944-, et al. (författare)
  • Method for manufacturing electro-optical device by use of polymer stabilized liquid crystal molecules
  • 2008
  • Patentabstract
    • The title method comprises arranging chiral or cholesteric liq. crystal (LC), photoreaction monomers and photosensitive initiator in an LC unit cell, and irradiating primary surface of the LC unit cell via UV light having non-uniform intensity distribution in the LC unit cell. The irradn. matches the photosensitive initiator for polymg. at least partial photoreaction monomers near the primary surface, so as to generate polymer network with d. corresponding to the intensity distribution of the non-uniform UV light, wherein the polymer network makes the LC bias to selected helical arrangement direction.
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6.
  • Komitov, Lachezar, 1944-, et al. (författare)
  • Method of fabricating electro-optical devices with polymer-stabilized liquid crystal molecules
  • 2006
  • Patentabstract
    • In a prepn. method, a chiral or cholesteric liq. crystal, a photoreactive monomer, and a photoinitiator are disposed in a liq. crystal cell. A principal surface of the liq. crystal cell is illuminated with UV light selected to have a nonuniform UV light intensity profile in the liq. crystal cell. The illuminating cooperates with the photoinitiator to polymerize at least a portion of the photoreactive monomer near the principal surface to generate a polymer network having a d. corresponding to the nonuniform UV light intensity profile. The polymer network biases the liq. crystal toward a selected helical alignment direction. In some embodiments, the illuminating includes illuminating with 1st and 2nd UV light intensity profiles to produce surface and vol. polymer network components.
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8.
  • Kozachenko, Andriy, et al. (författare)
  • Cholesteric liquid crystal display (LCD) device, and method for its production
  • 2006
  • Patentabstract
    • A liq. crystal device is disclosed, having one or several display segments, and comprising: a first display substrate, a second display substrate, a layer of liq. crystal material disposed between said first and second substrate; and layer of conductive material disposed on said substrates. The conductive layers form electrodes for applying an elec. field across the liq. crystal for switching the liq. crystal material between a first optical state and a second optical state different from said first optical state. Image features of the display are further defined by the inclusion of a layer of patterned non-conductive or passive dielec. material on at least one of the substrates, said patterned material forming a mask defining image elements of the display segments.
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9.
  • Lundh, Torbjörn, 1965-, et al. (författare)
  • Ny kärlprotes
  • 2009
  • Patentabstract
    • A vascular prosthesis is disclosed, comprising a forked tube, having: an inflow tube with an inflow end (6); a primary distal outflow branch with a primary distal outflow end (8); and a secondary proximal outflow branch with a secondary proximal outflow end (7). The two outflow ends are directed in different directions and the two outflow branches in the vicinity of the bifurcation (9) have different cross-sectional areas. Further, the secondary proximal outflow branch is more curved than the primary distal outflow branch, and the secondary proximal outflow branch in the vicinity of the bifurcation has a smaller cross-sectional area than the primary distal outflow branch. Hereby, energy losses at flow bifurcations is adapted to the bypass situation to even out the level of shear stress, thereby avoiding areas with low shear stress and decreasing the tendency for turbulent flow, thus reducing the risk of graftstenosis.
10.
  • Lundh, Torbjörn, 1965-, et al. (författare)
  • REMOVABLE STENT AND METHOD OF PRODUCTION
  • 2012
  • Patentabstract
    • A removable porous stent is disclosed, which can be placed in tubular structures. It can be placed at locations, which are unsuitable for permanent stents, like across important branches in the vasculature preferably in combination with anticoagulation. The walls of the stent are freely permeable for the blood flow. A temporary stent can be used during treatment of dissections with involvement of side branches. The dissected membrane is relocated to its original place and held in place by the stent until the healing process has reattached the membrane. At this point the stent will be removed. The removable stent can also be used as a carrier of chemotherapy and/or radiation to be placed in tubular structures for local treatment of cancer. The time for treatment is controlled and finished at removal. This approach will give the possibility to increase dosages and reduce side effects. The stent is formed by at least one continuous thread arranged in interconnected loops and having a reversible bind-off at one end of the tubular body, mechanically securing each loop at said end of the tubular body apart from a single releasable loop. This loop is preferably extended beyond the tubular structure of the stent enabling an initiation of the removal at a distance from the treatment site.
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