110 results about "Guest host" patented technology

Thermochromic filters are constructed using absorptive, reflective, or fluorescent dyes, molecules, polymers, particles, rods, or other orientation-dependent colorants that have their orientation, order, or director influenced by carrier materials, which are themselves influenced by temperature. These order-influencing carrier materials include thermotropic liquid crystals, which provide orientation to dyes and polymers in a Guest-Host system in the liquid-crystalline state at lower temperatures, but do not provide such order in the isotropic state at higher temperatures. The varying degree to which the absorptive, reflective, or fluorescent particles interact with light in the two states can be exploited to make many varieties of thermochromic filters. Thermochromic filters can control the flow of light and radiant heat through selective reflection, transmission, absorption, and/or re-emission. The filters have particular application in passive or active light-regulating and temperature-regulating films, materials, and devices, and particularly as construction materials and building and vehicle surfaces.

PCT No. PCT/JP96/03300 Sec. 371 Date Jul. 10, 1997 Sec. 102(e) Date Jul. 10, 1997 PCT Filed Nov. 11, 1996 PCT Pub. No. WO97/17415 PCT Pub. Date May 15, 1997The present invention provides a guest-host liquid-crystal composition comprising a host liquid-crystal composition containing one or more dichroic dyes, characterized in that the host liquid-crystal composition comprises as the main component a polycyclic compound having three or more rings and having no cyano group in the direction of the molecular axis, the proportion of the polycyclic compound component having three or more rings in the host liquid-crystal composition being 75% by mole or higher, and that the guest-host liquid-crystal composition has an order parameter (S value) of 0.76 or higher. The invention further provides a liquid-crystal display element employing the composition. This guest-host liquid-crystal composition shows excellent dichroism or a high order parameter.

A functionalized polymer for binding a dissolved molecule in an aqueous solution is presented. The polymer has a backbone polymer to which one or more functional groups are covalently linked. The backbone polymer can be such polymers as polyethylenimine, polyvinylamine, polyallylamine, and polypropylamine. These polymers are generally water-soluble, but can be insoluble when cross-linked. The functional group can be for example diol derivatives, polyol derivatives, thiol and dithiol derivatives, guest-host groups, affinity groups, beta-diphosphonic acids, and beta-diamides

A light controlling apparatus includes a first electrode on a first substrate; a first alignment film on the first electrode; a second electrode on a second substrate facing the first substrate; a second alignment film on the second electrode; and a guest-host liquid crystal layer having cholesteric liquid crystals and dichroic dyes between the first and second alignment films. The first and second electrodes provide a vertical electric field, and at least one of the first and second electrodes provides a horizontal electric field. The cholesteric liquid crystals have a homeotropic state when an electric field in a first direction is applied to the guest-host liquid crystal layer to realize a transparent mode. The cholesteric liquid crystals have a focal conic state when an electric field in a second direction is applied to realize a light shielding mode. A same state is maintained when no electric field is applied.

A light controlling apparatus, a method of fabricating the light controlling apparatus, and a transparent display device including the light controlling apparatus are disclosed, in which light may be transmitted or shielded using a polymer dispersed liquid crystal (PDLC) layer and a guest-host liquid crystal (GHLC) layer, where the guest-host liquid crystal layer includes dichroic dyes. The light controlling apparatus includes first and second substrates facing each other; a first electrode on the first substrate; a second electrode on the second substrate; and a polymer dispersed liquid crystal (PDLC) layer and a guest-host liquid crystal (GHLC) layer between the first electrode and the second electrode, wherein the PDLC layer includes first liquid crystals having droplets, and the GHLC layer includes second liquid crystals and dichroic dyes.

We describe a wide band variable transmission optical device, mixtures for use in such a device, and methods of making the same. The wide band optical device includes a cell comprising a guest-host mixture of a liquid crystal host and a dichroic guest dye material contained between a pair of plastic substrates. The optical device does not use polarizers. The liquid crystal host has an axis orientation that is alterable between a clear state orientation and a dark state orientation perpendicular thereto and the dichroic guest dye material includes one or more dichroic dyes. The optical device is characterized in that it exhibits a wide absorption band that is greater than 175nm within a visible wavelength range of 400-700nm and has a clear state transmission equal to or above 30% and a dark state transmission equal to or below 40%.

The present invention relates generally to the field of organic chemistry and particularly to the nematic lyotropic liquid crystal solution and negative dispersion retardation plate for application in 3D liquid crystal displays. The negative dispersion retardation plate comprises a substrate, and at least one optically anisotropic retardation layer comprising a multi-component guest-host composition coated onto the substrate.

An ion conducting membrane has a matrix including an ordered array of hollow channels and a nanocrystalline electrolyte contained within at least some or all of the channels. The channels have opposed open ends, and a channel width of 1000 nanometers or less, preferably 60 nanometers or less, and most preferably 10 nanometers or less. The channels may be aligned perpendicular to the matrix surface, and the length of the channels may be 10 nanometers to 1000 micrometers. The electrolyte has grain sizes of 100 nanometers or less, and preferably grain sizes of 1 to 50 nanometers. The electrolyte may include grains with a part of the grain boundaries aligned with inner walls of the channels to form a straight oriented grain-wall interface or the electrolyte may be a single crystal. In one form, the electrolyte conducts oxygen ions, the matrix is silica, and the electrolyte is yttrium doped zirconia.

A guest-host liquid crystal display device comprises a pair of substrates opposing each other with a space therebetween, a guest-host liquid crystal held in the space, the guest-host liquid crystal containing a dichroic dye mixture exhibiting a black color as a whole, and electrodes provided on the substrates for applying a voltage to the guest-host liquid crystal. The dichroic dye mixture comprises a bis-azo blue dye having a thienothiazole ring represented by the following chemical formula (1) and a tris-azo bluish purple dye having a benzothiazole ring represented by the following chemical formula (2): wherein R1 is a hydrogen or halogen atom, CnH2n+1, COCnH2n+1, OCOCnH2n+1, COOCnH2n+1, or CH2COOCnH2n+1, wherein n is an integer from 1 to 8; each of R2 and R3 is a hydrogen atom or CnH2n+1; R3 may be or and a combination of R2 and R3 may form wherein n is an integer from 1 to 8, and m is an integer from 1 to 5; and R4 is a hydrogen or halogen atom, or CnH2n+1, wherein n is an integer from 1 to 8.

We describe a wide band variable transmission optical device having an electronically active cell comprising a guest-host mixture of a liquid crystal host and a dichroic guest dye material contained between a pair of plastic substrates. The liquid crystal host has an axis orientation that is alterable between a clear state orientation and a dark state orientation and the dichroic guest dye material includes one or more dichroic dyes. The optical device is characterized in that it exhibits a wide absorption band that is greater than 175 nm within a visible wavelength range of 400-700 nm, has a clear state transmission equal to or above 30% and a dark state transmission equal to or below 40%.

A light control device and an imaging device suitable for the effective and stabilized driving of a Guest-Host type liquid crystal element. A light control device (23) which is provided with a light controlling GH cell (12) and a UV cut filter (65) provided on the light incident side of the GH cell (12), and which is therefore reduced significantly in the quantity of ultraviolet ray applied to the GH cell (12), thereby preventing the photodecompositon or photodegradation of materials constituting a liquid crystal layer in the GH cell (12); and an imaging device such as a CCD camera (50) having this light control device disposed on the optical path thereof.

Polymers and compounds having high-triplet-energy; guest-host films comprising the polymers or compounds as hosts and phosphorescent compounds as guests; and electroluminescent devices that include the films.

The present invention discloses a neural network and associated algorithms for improving the identification of chemically useful compounds without having to test each investigated compound individually. The method utilizes a neural network and associated algorithms for estimating the ability to dissolve poorly water soluble molecules by formation of water-soluble inclusion (guest-host) complexes.

The invention provides a dimming device containing a guest-host liquid crystal composition. The dimming device comprises an upper substrate, a lower substrate, an upper electric conduction layer, a lower electric conduction layer, an upper aligning layer, a lower aligning layer and the guest-host liquid crystal composition which is sandwiched between the upper aligning layer and the lower aligninglayer, wherein the guest-host liquid crystal composition comprises a dichroic dye and mother liquid crystals. As the guest-host liquid crystal composition is used for dimming, a polarizer is omitted,and the cost is greatly reduced.

An electro-optic system in accordance with an embodiment of the present invention comprises a high glass transition temperature (Tg≧about 210° C.) polymer matrix featuring aromatic groups on the backbone repeating unit, which hosts a guest, high hyperpolarizability organic NLO chromophore. Electro-optic systems according to embodiments of the present invention exhibit relatively high electro optical activity and low optical loss, and may exhibit optical stability at temperatures exceeding 70° C. Guest-host polymer systems in accordance with embodiments of the present invention may be formed into unique and appropriate shapes such as waveguides.

The present invention discloses a light control device and a manufacture method thereof, and a transparent display device having the light control device. A polymer dispersion liquid crystal (PDLC) layer and a guest-host type liquid crystal (GHLC) layer are adopted to transmit or shield light. The guest-host type liquid crystal layer comprises dichroism dye. The light control device comprises: a first substrate and a second substrate which are opposite, a first electrode on the first substrate, a second electrode on the second substrate, and the polymer dispersion liquid crystal layer and the guest-host type liquid crystal layer arranged between the first electrode and the second electrode. The PDLC layer comprises drops with a first liquid crystal, and the GHLC layer comprises a second liquid crystal and dichroism dye.

An apparatus for controlling the quantity of light incident on an image sensor by controlling size or shape of a diaphragm and also by adjusting light transmittance of the diaphragm is provided. The light control apparatus is disposed on the light path of the image sensing device and controls a quantity of light incident on the image sensor. The light control apparatus includes a Guest-Host LCD panel applied no polarizing film and a control unit for reducing the time to take multi-frame detection by driving voltages which are applied to respective pixels of the Guest-Host LCD panel, to be increased at least when taking multiple frames in series. The Guest-Host LCD panel has a plurality of pixels forming closed curves or boundaries on a plane, which are electrically driven individually. Also, the pixels have uniform light transmittance throughout the entire azimuth of the closed curves or boundaries with an origin.

A method for the manufacture of a polarizer is provided. The method comprises providing a liquid crystal composition comprising a liquid crystal host and a viscosity enhancer; providing a thin film of said composition on a substrate; orienting said liquid crystal host to obtain an aligned film in a first liquid crystal mesophase, wherein the liquid crystal host is aligned planar to said substrate; gelating said viscosity enhancer to congeal said film; and obtaining a second liquid crystal state in said congealed film. By the use of a viscosity enhancer in the composition, homeotropic alignment of the liquid crystal host can be suppressed.

The invention provides a reflecting panel. The reflecting panel comprises a guest-host liquid crystal box, wherein the guest-host liquid crystal box comprises an upper base plate, a lower base plate, and a guest-host liquid crystal layer encapsulated between the upper base plate and the lower base plate; the guest-host liquid crystal layer comprises liquid crystal molecules and dichroic dye molecules; the upper surface of the upper base plate adopts an incident plane for ambient light; the reflecting display panel also comprises a wire grid polarization layer positioned below the guest-host liquid crystal layer; the extending direction of a strip bulge in the wire grid polarization layer is the same with the orientation of the liquid crystal molecules in the guest-host liquid crystal layer. The reflecting display panel can greatly improve the use ratio of the ambient light and improve the display brightness of a corresponding display device.

Disclosed are a light modulation apparatus including a liquid crystal device; and a polarizing plate disposed in an optical path of light made incident on said liquid crystal device; wherein said liquid crystal device is of a guest-host type using a negative type liquid crystal as a host material, an image pickup apparatus using the light modulation apparatus, and methods of driving the light modulation apparatus and image pickup apparatus.

A light control device and a display device using the same. The light control device includes a polymer networked liquid crystal (PNLC) or polymer dispersed liquid crystal (PDLC) display switchable between a scattering state and a first display state, and a guest-host (G-H) liquid crystal display (LCD) switchable between a transparent state and a second display state. A light source of the G-H LCDis disposed at a side of the PNLC or PDLC display and aligned to its liquid crystal layer. In a first operational mode, the PNLC or PDLC display is switched to the first display state, and the G-H LCD is switched to the transparent state and becomes transparent. In a second operational mode, the G-H LCD is switched to the second display state, and the PNLC or PDLC display is switched to the scattering state to function as a light guide layer for the G-H LCD.