Nitto-denko Corporation

Optiva, Inc.

Russian Technology Group

Yuri A Bobrov

Leonid Y Ignatov

Pavel Ivan Lazarev

Alla Y Sakharova

Pochi Yeh

Ir Gvon Khan

Elena Yurievna Shishkina

Victor A Bykov

Georgiy N Vorozhtsov

Sergei I Popov

Tatiana D Ivanova

Khan Ir Gvon

Alexey V Kurbatov

Anisotropic film could be used for manufacturing devices of various purposes including information liquid crystal displays, illuminating equipment, decorative products, for manufacturing trademarks and service signs, etc. Essence of the invention: optically anisotropic film is obtained of molecularly oriented organic having varying direction of optical axis (axes) throughout its thickness on at least a fraction of the film's thickness, for at least one region of the spectrum and on at least a part of the area of the film. The present invention relates to a method of obtaining of the film.

Optically anisotropic film and method for making

Devices of information displays, in particular liquid crystal displays, which can be utilized in indication devices for various purposes. Liquid crystal displays, according to this disclosure, contain at least one layer of liquid crystal placed between two plates, on each plate there has been formed or applied at least one electrode or a system of electrodes, or an active matrix, and at least one layer of polarizer; while at least one polarizing layer is an E-type polarizer and at least one polarizing layer is an O-type polarizer.

Liquid crystal display including O-type and E-type polarizer

An apparatus for processing anisotropic films obtained from a liquid crystal solution containing at least one organic compound comprises means for holding a substrate carrying an anisotropic film and a processing facility including at least one channel or a system of connected channels, wherein the channel(s) is (are) provided with an input connected to means for supplying a working fluid and an output connected to a rarefaction or vacuum system, and at least a part of the channel(s) is open on the side of processed film. Means for moving the processing facility is provided to move the processing facility to the substrate. Means for pressing the processing facility to the surface of the anisotropic film and/or substrate is also provided.

Technological machinery for production of polarizers

The disclosure pertains to the devices of information displays, in particular liquid crystal displays, and could be utilized in indication devices for various purposes. Liquid crystal displays, according to this disclosure, contain at least one layer of liquid crystal placed between two plates, on each plates there has been formed or applied at least one electrode or a system of electrodes, or an active matrix, and at least one layer of polarizer; while at least one polarizing layer is the E-type polarizer and at least one polarizing layer is an O-type polarizer. The polarizer, according to the invention, consists of at least two polarizers, at least one of which is the E-type polarizer and at least one is the O-type polarizer.

The invention pertains to technological apparatus' for production of polarizers, obtained from lyotropic liquid crystals (LLC) based on organic compounds, in particular, dyes. The technological production line for polarizer formation comprises at least one system of formation of polarizer films from LLC of at least one organic compound, at least one system of local removal of the polarizer film material obtained from LLC of at least one organic compound, at least one substrate holder and at least one means of relative movement. Also introduced, an apparatus for formation of polarizer films from LLC of at least one organic compound and a system of localized removal of polarizer films obtained from LLC of at least one organic compound.

An apparatus for processing anisotropic films obtained from a liquid crystal solution containing at least one organic compound is provided. The apparatus comprises means for holding a substrate carrying an anisotropic film and a processing facility including at least one channel or a system of connected channels, wherein the channel(s) is (are) provided with an input connected to means for supplying a working fluid and an output connected to a rarefaction or vacuum system, and at least a part of the channel (s) is open on the side of processed film. Means for moving the processing facility is provided to move the processing facility to the substrate. Means for pressing the processing facility to the surface of the anisotropic film and/or substrate is also provided.

The invention pertains to thermo-resistant and light-resistant dichroic polarizers based on thin films of dichroic matters, in particular organic dyestuffs, in which molecules are ordered in a crystalline structure and applied on the surface of the substrate. The dichroic polarizer is characterized by the fact that it contains at least one anisotropically absorbing film comprised of oriented molecules. Anisotropically absorbing film is characterized by the fact that for the major axes of the ellipsoids of the real and imaginary parts of anisotropic refraction coefficient in the range of at least one absorption band of the following is true on the area with linear dimensions no less than the maximum wavelength: K&#x2267;K&#x3e;K where K, K, Kand n, n, n, are main values of the semiaxes of the ellipsoid representing the imaginary and real parts, accordingly, of the anisotropic refraction coefficient, and/or the anisotropically absorbing film is characterized by the fact that light transmission by two films with cross-oriented polarization axes does not increase at least in some range of wavelengths upon the deviation of its propagation from the normal to the polarizer plane.

Dichroic polarizer and material

A decorative material is disclosed which comprises two polarizers and at least one phase-shifting plate placed between the polarizers. Each polarizer has a controlled direction of polarization axis. The phase-shifting plate represents a continuous layer of an optically anisotropic material containing regions differing by optical properties.

Decorative material and method of its fabrication

The present invention pertains to the field of electronic devices and essentially relates to smart cards (electronic cards) including a display that comprises a liquid-crystal indication element with an internal polarizer. This invention also relates to a method for manufacturing this card. The purpose of this invention is to simplify the structure of the electronic card, to provide a single process for manufacturing the card together with the display, to reduce the thickness of the card, to improve the mechanical strength, the manufacturability and the economical characteristics of said card and to increase its reliability.

Interactive smart card and method of its fabrication

The present invention relates to heat-resistant and plarizers that use thin films of dichroic organic substances, mainly dichroic dyes applied on the surface of rigid or flexible substrates in which the molecules of the dichroic organic substance are arranged in the form of a crystalline grid. The purpose of this invention is to widen the spectral range of the polarizer operation while improving polarization characteristics. This dichroic polarizer includes a film having a portion at least consisting of a crystalline structure that comprises at least one dichroic organic substance, wherein the molecules or molecule fragments of this substance have a planar morphology. The dichroic substance consists of a dichroic substance having at least one crest on the spectral absorption curve within spectral ranges of 400 to 700 nm and/or 200 to 400 nm and 0.7 to 13 &mgr;m. The order parameter of the film S is defined by the formula S&equals;(D &minus;D )/(D ) in which D and D represent the optical density measured in the polarized light during the perpendicular and parallel orientations, respectively, of the polarizer polarization axis relative to the polarization plane of an electromagnetic radiation from a spectrometer. This parameter corresponds to at least one crest on the spectral absorption curve within a spectral range of 0.7 to 13 &mgr;m, and has a value not less than 0.8.

Dichroic polarizer and method for making the same

A liquid crystal display has a first substrate plate and a second substrate plate, and a liquid crystal layer disposed between the plates. A polarizing coating, having molecules of one or more organic dyes capable of forming a lyotropic liquid crystalline phase, is formed overlying a selected surface of each plate. Orientation of the polarizing coating is obtained by applying a force to the dye molecules when in the liquid crystal phase and subsequently converting the liquid crystal phase to a solid film.

Liquid crystal display and method

Polarizing coatings are formed from dyestuffs which provide a stable liquid crystalline phase in a wide range of concentrations, temperatures and pH-values. Particles formed by aggregates of the liquid crystal molecules are oriented in a predetermined direction to polarize light. The stability of the liquid crystalline state allows orienting the particles by mechanical forces such as a shearing force applied when the liquid crystal (,) is spread on a support surface (,) by a knife-like doctor (,) or a tension deformation force acting on the meniscus of the liquid crystal deposited between two surfaces (,) as the surfaces are peeled off one another. As a result, the polarizing coatings are formed in some embodiments by simple methods. In some embodiments, the polarizing coatings have a high lightfastness, a high thermal stability, and a high dichroic ratio.

Growing community of inventors

Moscow, Russia

Yuri A Bobrov