Liquid-crystal space-time light modulator on base of fullerene-containing pyridine structures for display and television technique |
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IPC classes for russian patent Liquid-crystal space-time light modulator on base of fullerene-containing pyridine structures for display and television technique (RU 2296354):
      
 Magnetic-inverting display panel / 2222055
The invention relates to a magnetic display panel with the inversion of the material, where the image is formed by inverting the magnetic display material using a magnet and washed by inverting materials magnet on the same side
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The invention relates to electro-optical devices and can be used to create information displays, imaging devices, Svetozarov
 The discovery of the nature of the alleged luminiferous ether / 2049312
The invention relates to physics
 Liquid-crystal space-time light modulator on base of fullerene-containing pyridine structures for display and television technique / 2296354
Device has to multiplayer electro-optic structure, which is formed by film of nematic liquid crystal (NLC) sensitized by photosensitive complex with charge transfer on base of system, which has to be photosensitive pyridine fullerene-structure. To orient molecules of LC the orienting coating is used made on base of film of non-photosensitive polyimide.
 Liquid crystal spatial light modulator (versions) / 2340923
Present invention pertains to measurement techniques. The liquid crystalline substance used in the modulator, which fills the space between current conducting coatings, is a smectic C*-type composition with ferroelectric properties, capable of forming in its layer, spatially inhomogeneous structures, with high speed modulating phase of the transmitted light, under the effect of pulsed alternating electrical voltage. The light is modulated using one spatially inhomogeneous modulating element, whose surface area is equal to the aperture of the whole modulator, with solid current conducting coatings on the whole aperture. The pulsed control alternating electrical voltage is applied to the single pair of current conducting coatings. In the second version, one of the current conducting coatings is reflective.
 Liquid-crystal space-time light modulator based on fullerene containing pyridine structures with orienting coatings based on carbon nanotubes / 2341818
Proposed device is a multilayered electro-optical structure, consisting of a film of a nematic liquid crystal, sensitised by a light-sensitive charge-transfer complex which is based on a system consisting of light-sensitive pyridine structure and fullerene. For orientation of the molecules of the liquid crystal, an orienting coating based on carbon nanotubes is used.
 Polarising films for visible spectrum range with nanostructured surface based on hydrocarbon nanotubes / 2426157
Polarising iodic-polyvinyl film for laser, television, display and medical equipment, for construction of spatial time light modulators, display pixels, limit stops, laser radiation switches, eye protection means for welders, pilots of aircrafts. It contains iodinated polyvinyl alcohol, with low content of acetate groups, as polarisation base; at that, both film surfaces are nanostructured with single-wall carbon nanotubes by their laser application to film surfaces by means of CO2 laser and orientation in electric field with intensity of 50-200 V/m.
 Multistable electrooptic element with polarisers / 2428733
Element has two parallel transparent plates with transparent electrodes on inner sides between which there is a film of a capsular polymer of cholesteric liquid crystal, and the cholesteric liquid crystal used is a mixture of an ionic surfactant and a cholesteric liquid crystal with arbitrary value of dielectric anisotropy. On the outer sides of the transparent plates there are crossed polarisers.
 Ferroelectric lcd cell / 2430393
Proposed cell comprises two flat translucent plates arranged in parallel one above the other. Polaroids are applied on one side of said plates and translucent current conducting coats connected to alternating voltage source are applied on their opposite side. Cell comprises also ferroelectric liquid crystal (FLC) arranged between said coats of plates to vary its optical anisotropy at electric field effects. FLC layer thickness - d, helicoid pitch- p0 and boundary conditions defined by factor Wq are selected subject to the following conditions: Kφq0 2 ~Wq/d, where Kφ is modulus defining FLC deformation along azimuthal angle φ; q0 is deformation wave vector; Wq is square factor of power of FLC-to-adjoining surface adhesion.
 Liquid-crystal space-time modulator of light based on complex of polyimide-quantum points of row cdse(zns), cds/zns, inp/zns for display, television equipment and systems of laser radiation switching / 2459223
Liquid crystal space-time light modulator is proposed, representing a multilayer electro-optical structure comprising a film of a nematic liquid crystal (NLC) sensitised with a photosensitive complex with a charge transfer on the basis of the system: polyimide-quantum points of the row CdSe(ZnS), CdS/ZnS, InP/ZnS. To align LC molecules, an aligning coating is used on the basis of non-photosensitive polyimide films. When this device is functioning, it is proposed to use a permanent or a pulse lighting and a pulse supply voltage.
 Polarising films for visible spectrum range having nanostructured surface based on carbon nanotubes and nanofibres / 2498373
Polarising film is a film of iodised polyvinyl alcohol with a mixture of carbon nanotubes and carbon nanofibres deposited on two sides by laser deposition using p-polarised radiation of a CO2 laser at wavelength 10.6 mcm, as well as orientation the deposited nanostructures in an electric field with strength of 50-200 V/m.
 Ferroelectric liquid crystal display cell / 2503984
Ferroelectric liquid crystal display cell has two flat transparent plates arranged in parallel one above the other, on one side of which there are polaroids and on the other - transparent current-conducting coatings which are connected to an alternating-sign voltage source, on the surface of which a direction is selected for providing uniform orientation of liquid crystal molecules, a ferroelectric liquid crystal situated in the space between the transparent current-conducting coatings of the plates and which varies its optical anisotropy under the effect of an electric field. The crystal is non-helicoidal, and the values of rotational viscosity, spontaneous polarisation and modulus of elasticity, which determines deformation along smectic layers, are in a ratio to each other which provides periodic spatial deformations along the smectic layers and a characteristic relationship between birefringence of the display cell and alternating frequency of the electric field.
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FIELD: optical instrument engineering. SUBSTANCE: device has to multiplayer electro-optic structure, which is formed by film of nematic liquid crystal (NLC) sensitized by photosensitive complex with charge transfer on base of system, which has to be photosensitive pyridine fullerene-structure. To orient molecules of LC the orienting coating is used made on base of film of non-photosensitive polyimide. EFFECT: increased speed of operation of modulator. 2 dwg, 1 tbl
The invention relates to the field of optical instrumentation, useful for solving problems of display and TV equipment. The device is an electro-optical multilayer structure consisting of a film of nematic liquid crystal (NLC), sensitized photosensitive complex charge-transfer-based systems: a photosensitive pyridine structure of the fullerene. For the orientation of the molecules of the LCD is used orienting based coating films photocasting polyimide. In the operation of this device it is proposed to use a pulsed power mode and constant mode of illumination. The technical result is an improved switching times. Table 1. The invention relates to the field of optical instrument, in particular to the design of electrically controlled liquid crystal-spatial light modulators (LC-PWM) for switching threads radiation, for example for display, television, medical, laser technique. The modulator is a key element of the schema registration, display and switching of optical information, perform transactions in real time [1]. It is the redistribution of radiation due to a change in birefringence LCD, caused by changing the orientation of W is cocrystalline molecules at the interface: solid orienting film sensitized LCD layer when switching on the electric field. Specifications LCD PWMs are determined by the spectral parameters sensitized LCD layer, matching the refractive indices of the LCD and sensitizing components, type electro-optic effect in the LCD, the nature of the orienting coverage, the terms of negotiation power modes and modes of exposure, and other aspects. A known design of electrically controlled nematic LCD PWMs selected as the analogue of [2], containing the electro-optical component on the basis of polymerdispersionen LCD sensitized with a mixture of photosubstitution the polyimide-pyridine structure-fullerene and photosubstitution the polyimide as an orienting layer. Among a wide class of electrically-controlled LCD PWMs polymer-dispersed liquid crystal (PGK) modulators occupy a special place. Here an important feature of the LCD is the presence of weak dispersion forces between molecules and high orienting ability, which is used in the creation of composite materials. LCD, focusing suspended particles in them, act as molecular matrix, easily managed by an external field. Particles become sensitive to the action of the external field and the changing orientation of the liquid crystal matrix. Outside the I act as a volume on the LCD, and orienting the surface (and hence to the surrounding molecules of the LCD). Thus, the electric field applied to the liquid crystal, or flowing through Wednesday, electric current can be used to reorient the molecules of the LCD. In addition, polymerdispersionen LCD PWMs unique because of possible combinations in one layer of the electrooptical parameters LCD components and photosensitivity and plasticity polymeric bases [3]. However, the performance of nematic PGC worse than, for example, smectic LCD. A disadvantage of the known design of the modulator is low performance. Known development PGC modulator based polymerdispersionen LCD sensitized with a mixture of photosubstitution the polyimide-pyridine structure-fullerene has the following performance: 5 MS when switching electro-optical response 10 MS when switching off (relaxation of the system to its original state), provided that operation of the device in a pulsed power mode at a constant illumination by radiation from a He-Ne laser. On the same device, optimizing the amplitude of the pulse power, the authors [2] have received performance 3.5 MS to enable and 4-5 MS is turned on. Known design PGC modulator, selected as a prototype, containing as an electro-optical layer is polymerdispersionen nematic LC, sensitized with a mixture of photosubstitution the polyimide-pyridine structure-fullerene and as an orienting layer photosubstitution polyimide [4]. The device worked in a mode of constant illumination with a pulsed voltage, and showed speed: 2.5 MS switch - on time and 4ms - off time. Some reduction of switching times was associated with a predominant use of anisotropic molecules of fullerenes With70and not With60. In the experiment the authors [4] have studied the rise of the electro-optic response of the first oscillation bandwidth, clearly recorded transition in neighboring extreme position on S-curve that corresponded to the change of the phase delay π. The disadvantage of this design of the modulator was insufficient performance, making it difficult to use this device in high-speed television, display, holographic, laser correlation systems. The technical result of the invention is to further improve performance PGC modulator. This result is achieved in that in the known device, the construction of which includes, as the electro-optical layer polymerdispersionen nematic LC layer sensitized with a mixture of photosubstitution the polyimide-PI is adinova structure-fullerene and as an orienting layer photosubstitution polyimide, use polymerdispersionen nematic LC layer sensitized with a mixture of pyridine structure of the fullerene. Replacement three-sensitizing fullerenelike supplements to the LCD layer on two fullerenelike sensitizing composition creates the conditions for an accelerated process of complex formation between the donor part of the pyridine molecules and fullerene, the energy of the electron affinity which, 2.65 eV, 4 times the energy of the electron affinity of intramolecular acceptor fragment pyridine molecules, dipole moment formed complexes with charge transfer in 2 times above, than at the individual component [5], and the local polarization per unit volume fullerenelike environment outweighs that of the pure NLC [6]. These factors allow more efficient to reorientation of the molecules of the LCD when turning on the electric field, significantly increasing performance (see table). During operation of the proposed design PJK used pulse voltage, and continuous illumination.
Comparative analysis with the prototype shows that the claimed PGC-modulator differs in that to improve the performance of electro-optical layer is used electro-optical layer of a different composition: NLC sensitized with a mixture consisting of a complex charge-transfer pyridine molecule fullerene. Thus, the proposed device meets the criterion of "novelty." The invention is illustrated by the drawing, which presents the design of the modulator (figa, b), and a circuit for measuring the temporal characteristics (figure 2). Offer PGC-modulator (figure 1) is a multilayer system (figa), consisting of a layer polymerdispersionen nematic liquid crystal (1) thickness of 10 μm and orienting polyimide layer (2) with a thickness of 1 μm. The thickness of the LC layer was asked Teflon spacers (5). The structure was between two glass p is dlogtime (3) with a diameter of 35 mm with prozrachnymi conductive coatings (4), obtained by the method of vacuum deposition of indium oxide with the addition of oxide of tin. The initial orientation of the LCD planar, used S-effect. Measuring the temporal characteristics PGC modulator was carried out according to the scheme shown in figure 2, which presents a HeNe laser (L), polarizer (P), a separating plate (LD) deck with filters (LF) for the variation of the radiation power, for removal of radiation on the photodiodes (RM and RM), analyzer (A), PGC (LC). PGC modulator worked as follows. Continuous wave HeNe laser hit in the spectral region of the functioning of a nematic LC with the complex charge transfer: the pyridine molecule fullerene. The shift towards red wavelengths including the wavelength of the HeNe laser, 633 nm in the absorption spectra of the pyridine system with the introduction of fullerenes was first studied and it is shown in [7]. The spot diameter on PGC-modulator was 3 mm, which significantly exceeded the size of the inhomogeneities in PGC-layer (the size of the latter was about 200 nm). The maximum exposure was 10 mW. The modulator is operated in the "transmission". To power the modulator was used pulse voltage with a pulse parameters: amplitude (A) 10-60 In duration (τPete) from 5 to 90 MS and repetition frequency (1/T) from 0.5 to 2000 Hz. Electrooptical about the click was registered after the analyzer, behind PGC-modulator, using a photodiode (RM) and was recorded on the oscilloscope C8-17 in standby mode. The activation time was defined as the rise time of the electro-optic response of the level of 0.1 up to a level of 0.9 of its maximum value. The time off was defined as the decay time of the electro-optic response from its maximum value to the level of 0.1. Use as electro-optical NLC layer sensitized with a mixture consisting of a complex charge-transfer pyridine molecule fullerene, resulted in an order to increase the speed of the modulator. Improved performance of the device, which is a necessary condition of its application in high-speed display and television systems, and in laser technology have reduced the time on and off with 2.5 and 4 MS [4] to 0.1 and 0.3-0.5 MS, that is, more than 10 times. The specified functional improvement of the device will allow to extend the scope of electro-optical PGC-light modulators. Sources of information 1. Vasiliev A.A., Casasent D., Kompanets I.P., Parfenov V. Spatial light modulators, - M.: Radio and communication. 1987, 320 S. 2. N.V. kamanina, Kapersky LN. The effect of fullerenes on the dynamic characteristics of liquid-crystal systems. Technical physics letters, t, No. 19, p.30-38, 2000. 3. Zharkova G.M., A.S. Sonin W is cocrystalline composites. Novosibirsk: Nauka, 1994. 214 S. 4. N.V. kamanina, rakcheyeva L.P. prospects for the use of fullerenes for orientation of liquid crystal compositions, Letters, V.28, No. 11, pp.28-36, 2002. 5. N.V. kamanina, Sheka E.F. Limiters laser radiation and diffraction elements based system COANP-fullerene: nonlinear optical properties and quantum-chemical modeling. Optics and spectroscopy, t, No. 4, s-673, 2004. 6. N.V. kamanina Fullerenelike dispersed nematic liquid crystal structures: dynamic characteristics and processes of self-organization, the Success of the physical Sciences, t, No. 4, s-454, 2005. 7. N.Kamanina N., A. Barrientos, A. Leyderman, Y. Cui, V. Vikhnin and M. Vlasse, "Effect of fullerene doping on the absorption edge shift in COANP", Molecular Materials, v.13, no.1-4, p.275-280, 2000. A liquid-crystal spatial-temporal light modulator on the basis of fullerensoderzhashchikh pyridine structures for display and TV equipment containing nematic liquid crystal as the electro-optic modulating medium, photosubstitution the polyimide as orienting coating, characterized in that the electro-optical medium is made in the form of thin films of nematic liquid crystal, sensitized with a mixture consisting of a complex charge-transfer pyridine molecule fullerene.
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