124 results about "Dichroic dye" patented technology

The invention relates to the technical field of liquid crystal devices, and particularly discloses a normally-on flexible liquid crystal dimming film and a preparation method thereof. The structure of the normally-on flexible liquid crystal dimming film sequentially comprises a first flexible transparent substrate, a first vertical alignment layer, a dye liquid crystal layer, a second vertical alignment layer and a second flexible transparent substrate from top to bottom, wherein the materials of the first vertical alignment layer and the second vertical alignment layer are selected from side chain type transparent polyimide materials; the dye liquid crystal layer comprises black dichroic dye and negative phase liquid crystal. By accurately controlling the orientation arrangement of liquid crystal molecules, a high-precision pretilt angle is realized, the light modulation amplitude in a visible light broadband range reaches 45% or above, and the photoelectric property is equivalent to that of a normally dark (forward) mode liquid crystal dimming film.

The invention discloses a near-infrared dichroic dye, a liquid crystal composition and application of the near-infrared dichroic dye and the liquid crystal composition. The structural general formula of the disclosed dichroic dye is as shown in formula I in the specification. According to the invention, a hydrogenated quinoline ring, a hydrogenated benzopyran ring and a hydrogenated naphthalene ring are introduced into a molecular skeleton, so that the novel near-infrared dichroic dye with high light stability, high solubility, high order parameter and high light modulation capability is obtained. Compared with the near-infrared dichroic dye disclosed in the prior art, the absorption band is further subjected to red shift, and the light modulation capability is remarkably improved; ordering parameters are greatly improved, and the application bottleneck is solved.

The invention relates to the technical field of dimming films, in particular to a black dichroic dye composition, a PDLC (Polymer Dispersed Liquid Crystal) dimming film as well as a preparation method and application of the PDLC dimming film. Comprising a compound of formula D1, a compound of formula D2 and a compound of formula D3; formula D1; formula D2; formula D3; the black dichroic dye composition is a total anthraquinone black dye composition, the value a of the prepared dimming film is-5-5 and the value b of the prepared dimming film is-5-5 at 0V, and Eab is smaller than or equal to 2 at 0V and 48V, and compared with azo dichroic dye, the black dichroic dye composition has better heat insulation and sun protection performance and meets the use requirements in automobile panoramic skyscreens, skylight dimming glass and building glass.

The present invention relates to dichroic dye compounds of formula I, as defined in claim 1, which are based on the donor-acceptor structure wherein the donor moiety comprises a polycyclic heteroaromatic group consisting of at least four fused rings, to mesogenic media comprising one or more compounds of formula I, the present invention relates to novel compounds, mesogenic media and liquid crystal materials, and to the use of these compounds, mesogenic media and liquid crystal materials in optical, electronic and electro-optical applications, in particular in devices for regulating energy through external spaces into internal spaces, for example in switchable windows for solar control in smart buildings and vehicles, with energy conservation and improved comfort.

The invention discloses a dye liquid crystal composition and application thereof, and belongs to the technical field of liquid crystal materials. The dye liquid crystal composition is composed of a liquid crystal main body, a dichroic dye and a chiral agent, and the liquid crystal main body is composed of at least one compound represented by a general formula I, at least one compound represented by a general formula II and at least one compound represented by a general formula III: I, II and III. The dye liquid crystal composition has the beneficial effects that the dye liquid crystal composition is relatively high in response speed, relatively low in driving power consumption, relatively high in contrast ratio and good in photo-thermal stability.

The present invention provides a winding body for an optical laminate that can suppress the adhesion of the optical laminate at the end of the winding shaft. [Solution] The winding body is a winding body formed by winding an optical laminate. The optical laminate has a base layer, a cured layer of a curable composition formed on the base layer, and a light-absorbing anisotropic layer formed on the side of the base layer opposite to the cured layer. The light-absorbing anisotropic layer contains a polymer of a polymerizable liquid crystal compound and a dichroic dye, and has a light absorption axis perpendicular to the plane of the light-absorbing anisotropic layer. In a cross section perpendicular to the winding direction of the optical laminate, when the width of the base layer is A, the width of the cured layer is B, and the width of the light-absorbing anisotropic layer is C, the following relationships (1) to (3) are satisfied. 0.90 ≤ B / C ≤ 1.10 (1) 0.90 ≤ B / A < 1.00 (2) 0.88 ≤ C / A < 1.00 (3)

This invention provides a liquid crystal light control element with which it is possible to achieve both an antiglare function and a heat generation suppression function. According to an embodiment, this liquid crystal light control element is characterized in that: the element includes a pair of transparent electrode substrates having a transparent electrode layer, and a light control layer disposed inside the transparent electrode substrates and containing liquid crystal molecules; the light control layer contains a dichroic dye; and the visible light transmittance of the transparent electrode substrates is 89% or less, and the visible light reflectance of the transparent electrode substrates is 6.5% or more.

Provided is a polarizing plate in which the decrease in transmittance in a high-temperature environment is suppressed. Provided is a polarizing plate having a polarizing element in which a dichroic dye is adsorbed to a polyvinyl alcohol-based resin layer and oriented, and a transparent protective film laminated to at least one face of the polarizing element, the polarizing element and the transparent protective film being bonded via an adhesive layer formed by an adhesive containing an ammonium ion donor, the water content of the polarizing element being equal to or higher than the equilibrium water content at a temperature of 20°C and a relative humidity of 30% and equal to or lower than the equilibrium water content at a temperature of 20°C and a relative humidity of 50%.

The present application provides a polarizing plate capable of inhibiting the decrease in transmittance in a high-temperature environment and having excellent water resistance. Provided is a polarizing plate having a polarizing element in which a dichroic dye is adsorbed to a polyvinyl alcohol-based resin layer and the dichroic dye is oriented, and a transparent protective film laminated to at least one face of the polarizing element, the polarizing element and the transparent protective film being bonded by an adhesive layer formed of an adhesive containing a urea-based compound and a dialdehyde, the urea compound being at least one selected from the group consisting of urea, a urea derivative, thiourea, and a thiourea derivative, and the water content of the polarizing element being equal to or higher than the equilibrium water content at 20°C and 30% RH and equal to or lower than the equilibrium water content at 20°C and 50% RH.

The present invention provides an optical laminated film with an adhesive layer that prevents the inclusion of air bubbles near the edges when bonding to the surface of the substrate. [Solution] The adhesive-layered optical laminated film 1A comprises, in this order, a surface protective film 7, an optical laminated film 4A containing a polarizer 2 on which a dichroic dye is adsorbed and oriented, an adhesive layer 5, and a separator 6 that is peelably in contact with the adhesive layer 5. On at least a portion of the side surface of the adhesive-layered optical laminated film 1A, the adhesive layer 5 and the separator 6 protrude outward by 1 μm to less than 10 μm beyond the outermost position of the optical laminated film 4A, and the protruding portion of the adhesive layer 5 is curved upward by 1 μm or more towards the optical laminated film 4A. When the separator 6 is peeled off and the optical laminated film 4A is bonded to the surface of the adherend, the outermost edge of the adhesive layer 5 does not come into contact with the surface of the adherend first, and therefore air bubbles are less likely to be introduced.

The invention relates to an azo blue dichroic dye compound and application thereof, and belongs to the technical field of organic optical materials. In order to solve the problem of insufficient thermal stability of the existing azo blue dichroic dye compound, the invention provides an azo blue dichroic dye compound with a structure as shown in a formula I, r1 and R4 are respectively and independently selected from C1-C6 saturated alkyl substituent groups, R2 represents-H, CH3 or-F, R3 represents hydrogen atoms or C1-C6 saturated alkyl substituent groups, and R2 and R3 cannot be hydrogen atoms at the same time. The molecular structure can effectively inhibit the risk of thermal isomerization of azo bonds, improves the stability of dye molecules in a high-temperature environment, and can be used for high-temperature application scenes such as vehicle-mounted sunroofs and the like.

The invention relates to a laminate. The purpose of the present invention is to provide a laminate capable of suppressing halo phenomenon while ensuring good brightness in a display device capable of local dimming. The solution of the present invention is a laminate comprising a low-reflection film and a functional layer, the low-reflection film having a visible light average reflectance of 0.05% to 5% and a total light transmittance of 93% or more, and the functional layer having an average reflectance of 0.05% to 5% and a total light transmittance of 93% or more. The functional layer is a film obtained by curing a liquid crystal compound and a dichroic dye in a state in which the liquid crystal compound and the dichroic dye are oriented in a direction perpendicular to the plane of the layer. The amount c (parts by mass) of the dichroic dye contained in the functional layer per 100 parts by mass of the liquid crystalline compound and the thickness t ([mu] m) of the functional layer satisfy the following formula (1): 5 < = c * t < = 40.

Provided is a polarizing plate in which the decrease in transmittance in a high-temperature environment is suppressed. A polarizing plate has a polarizing element in which a dichroic dye is adsorbed and oriented in a polyvinyl alcohol-based resin layer, a first transparent protective film laminated on one face of the polarizing element, and a second transparent protective film laminated on the other face of the polarizing element, the polarizing element and the transparent protective films being bonded with a first adhesive layer formed from a first adhesive containing a first compound, the polarizing element and the second transparent protective film being bonded with a second adhesive layer formed from a second adhesive containing a second compound, the first compound being at least one selected from the group consisting of urea, a urea derivative, thiourea, and a thiourea derivative, and the second compound being a compound having a nitroxyl radical or a nitroxide radical.

An object of the present invention is to provide a polymer dispersed liquid crystal film that can switch a colored state and a transparent state, and has improved transparency in the colored state. A polymer dispersed liquid crystal film of the present invention includes in the following order: a first transparent conductive film; a polymer dispersed liquid crystal layer; and a second transparent conductive film. The polymer dispersed liquid crystal layer contains: a polymer matrix; and droplets dispersed in the polymer matrix, the droplets each containing a liquid crystal component and a dichroic dye. The droplets have an average particle diameter of 1 μm or less. The polymer dispersed liquid crystal film has a clarity in a colored state of 90 or more.

This application discloses a display panel, its manufacturing process, and a display device, relating to the field of display technology. The display panel includes a color filter substrate and an array substrate disposed opposite each other. The display panel also includes a liquid crystal composite layer, an electrode layer, an upper polarizer, and a lower polarizer. The liquid crystal composite layer is disposed between the color filter substrate and the array substrate. The liquid crystal composite layer includes liquid crystal molecules and dichroic dye molecules, with the absorption axis of the dichroic dye molecules perpendicular to the long axis of the liquid crystal molecules. The electrode layer includes a first electrode and a second electrode disposed on the array substrate. The first and second electrodes drive the liquid crystal composite layer, which includes a first state and a second state. The first and second electrodes control the switching of the liquid crystal composite layer between the first and second states. The display panel of this application achieves bright and dark states by controlling the switching of the liquid crystal composite layer between the first and second states through the electrode layer.

The invention relates to liquid crystal materials containing compounds of formula (I), in which the groups and parameters occurring have the meanings given in claim 1, and one or more dichroic dyes, and to the use thereof in active matrix displays, in particular in IPS or FFS displays.

Provided is an organic light emitting display device. The organic light emitting display device comprises a display panel; and an optical laminate disposed on the display panel and including a multi-functional layer. The multi-functional layer contains a liquid crystal mixture including a liquid crystal compound and two or more types of dichroic dyes, below the multi-functional layer, the liquid crystal compound is contained, but the two or more types of dichroic dyes are not included and above the multi-functional layer, the two or more types of dichroic layers are contained.

To provide a vertical polarizing plate (1) capable of minimizing the reduction in polarizing performance even when incorporated into the viewing side of an organic EL image display device and used outdoors.SOLUTION: A vertical polarizing plate (1) of the present invention comprises an ultraviolet absorbing film (2), an oxygen barrier layer (3), and a vertical polarizing film (4) having a dichroic dye vertically oriented therein, laminated in the described order, where a portion from the ultraviolet absorbing film (2) to the oxygen barrier layer (3) has a light transmittance of 10% or less at a 380 nm wavelength.SELECTED DRAWING: Figure 1

This invention relates to a liquid crystal electrically controlled reflector capable of breaking the reflectivity limit, comprising, from front to back, a first liquid crystal device, a second liquid crystal device, a first reflective polarizer, and a second reflective polarizer. The main body of the first liquid crystal device is a first liquid crystal cell sandwiched with a first liquid crystal layer. The first liquid crystal layer is composed of negative liquid crystal doped with dichroic dyes. In its natural state, the negative liquid crystal molecules and the dichroic dye molecules are perpendicularly aligned, while in the driven state, the negative liquid crystal molecules drive the dichroic dye molecules to deflect along a second axis. The second liquid crystal device has a 90° optical rotation function in its natural state, but no optical rotation function in the driven state. This invention not only achieves efficient reflection of two beams of orthogonally polarized states simultaneously in its high-reflectivity operating mode, significantly improving the overall reflectivity, but also reduces the reflectivity to a minimum level in its low-reflectivity operating mode.

The light control sheet comprises: a light control layer containing a liquid crystal compound and a dichroic dye; and a pair of transparent electrode layers, i.e., a first transparent electrode layer and a second transparent electrode layer, which sandwich the dimming layer. When viewed from a position facing the surface of the dimming sheet, the first transparent electrode layer includes a non-conductive portion extending linearly and a conductive portion separated by the non-conductive portion, and a conductive portion in the second transparent electrode layer overlaps the conductive portion and the non-conductive portion, respectively. The average transmittance of light in the infrared region of the dimming sheet in the opaque state is 64% or less.

To provide a light control device and light control module, which increase transparency with less areas that appear cloudy when viewed from any angle when the light control device of a normal type is energized and in the transparent state.SOLUTION: A light control device provided herein comprises a light control layer and outer support layers sandwiching the light control layer from both sides, and is configured such that the light control layer becomes transparent when current is applied to the light control layer through the outer support layers and that the light control layer becomes opaque when current is not applied to the light control layer through the outer support layers. The light control layer contains a dichroic dye, and appears black when in the opaque state and exhibits a haze of 14% or less within a viewing angle of 170° when in the transparent state.SELECTED DRAWING: Figure 3

To provide a polarizing plate which is excellent in a suppression effect of deterioration in a polarization degree even when exposed, for example, to a high-temperature environment of 115°C.SOLUTION: A polarizing plate includes: a polarizer obtained by absorbing and orienting a dichroic dye to a polyvinyl alcohol resin layer; and a transparent protective film. The polarizer has a peak half-value width of 4.80 nm-1 or more, which is measured by a wide-angle X-ray scattering method and derived from a polyvinyl alcohol crystal, and contains a potassium ion and a metal ion other than the potassium ion. The metal ion other than the potassium ion has a content rate of 0.05 mass% or more.SELECTED DRAWING: None

The invention relates to an illuminable laminated vehicle glazing comprising a guiding layer, a liquid crystal cell with variable light absorption and diffusion, the liquid crystal cell containing an electroactive layer (93) comprising liquid crystals, a polymer phase and dichroic dyes, and an optical insulating coating on a non-fluoropolymer carrier film or on the liquid crystal cell. Figure 1

Provided is a vertical polarizing plate (1) that suppresses degradation of polarization performance even when used outdoors and assembled on the observation side of an organic EL image display device. A vertical polarizing plate (1) according to the present invention is characterized in that an ultraviolet absorbing film (2), an oxygen barrier layer (3), and a vertical polarizing film (4) in which a dichroic dye is vertically oriented are laminated in this order, and the light transmittance at a wavelength of 380 nm from the ultraviolet absorbing film (2) to the oxygen barrier layer (3) is 10% or less.

The utility model relates to a zero-field vertex bistable nematic guest-host bi-directional dye liquid crystal display, and belongs to the field of display. Comprising liquid crystal, liquid crystal dye, an upper substrate, a lower substrate, a grating and a plurality of frame adhesives, the upper substrate is arranged above the lower substrate, the frame glue is arranged between the upper substrate and the lower substrate, the liquid crystal, the liquid crystal dye and the optical grating are all arranged in a space defined by the upper substrate, the lower substrate and the frame glue, the optical grating is installed on the lower substrate, and the liquid crystal dye is arranged in the space. The lower substrate is connected with a power supply, and the arrangement mode of the liquid crystal dye is the same as that of the liquid crystal. According to the utility model, the material cost and the production process of the product are reduced, the yield of the product is improved, a polaroid is not needed according to the application requirement of the product, and the application range of the product is expanded.

The invention discloses a dichroic dye, a liquid crystal composition and application of the dichroic dye and the liquid crystal composition. The structural formula of the dichroic dye is shown in the formula I in the specification. A hydrogenated quinoline ring, a hydrogenated benzopyran ring and a hydrogenated naphthalene ring are introduced into a molecular skeleton, so that the novel dichroic dye with high light stability, high solubility, high dichroic ratio and high light modulation capability is obtained. The liquid crystal composition and the dimming glass device prepared from the dichroic dye have the advantages of high photo-thermal stability, high order parameter, wide working temperature area and the like.

The invention relates to the technical field of dichroic dyes, and particularly provides a total anthraquinone type black dichroic dye, a guest-host liquid crystal composition containing the total anthraquinone type black dichroic dye and application of the total anthraquinone type black dichroic dye. The total anthraquinone type black dichroic dye provided by the invention comprises an anthraquinone type orange dye, an anthraquinone type red dye and an anthraquinone type blue dye, each of the anthraquinone orange dye, the anthraquinone red dye and the anthraquinone blue dye comprises a structural formula as shown in a formula (1). The total anthraquinone type black dichroic dye provided by the invention shows remarkable absorption in a visible light broadband range of 400-650nm, not only covers a main interval from purple light to red light, but also keeps relatively stable absorbance in the broadband, and shows broadband absorption characteristics; meanwhile, the average dichroic ratio can reach 11.28, and the optical performance is excellent; and the material also has excellent switching performance between a black opaque state and a transparent state, and can realize rapid reversible switching between the two states under the action of an electric field.

The invention provides an optical laminated film with an adhesive layer and a method for polishing the optical laminated film with the adhesive layer, wherein bubbles can be prevented from being mixed into the vicinity of an end part when the optical laminated film is attached to the surface of an adherend. [Solution] An optical laminated film (1A) with an adhesive layer comprises, in this order, a surface protection film (7), an optical laminated film (4A) containing a polarizer (2) in which a dichroic dye is adsorbed and oriented, an adhesive layer (5), and a separator (6) that is in peelable contact with the adhesive layer (5). In at least a portion of the side surface of the adhesive-layer-attached optical laminate film (1A), the adhesive layer (5) and the separator (6) protrude outward from the end position of the optical laminate film (4A) by 1 [mu] m or more and less than 10 [mu] m, and the protruding portion of the adhesive layer (5) is tilted by 1 [mu] m or more toward the optical laminate film (4A).

The present invention relates to the technical field of dimming films, and particularly to a dye PDLC composition and a PDLC dimming film. Based on the total weight of the dye PDLC composition being 100%, the dye PDLC composition comprises the following components in percentage by weight: 35-66% of a liquid crystal composition, 3-7% of an anthraquinone-type dichroic dye, 30-60% of a polymer precursor, 0.05-3% of a photoinitiator, and 0.2-1% of a spacer. The polymer precursor comprises an oligomer and an active diluent with a mass ratio of 1:(2-7). The components of the dye PDLC composition provided by the present invention act synergistically, and the PDLC dimming film prepared therefrom has a high off-state haze, a low on-state haze, and a low driving voltage, and at the same time has excellent properties such as light absorption and heat insulation, a wide full-light dimming range, and color tunability.

To suppress polyene formation in a polarizer made of a polyvinyl alcohol resin film.SOLUTION: A polarizing plate 100 includes a polarizer 101 in which a dichroic dye is adsorbed and aligned on a polyvinyl alcohol-based resin film, and a protective film 103 laminated on at least one surface of the polarizer 101 via an adhesive layer 102. The adhesive layer 102 contains a urea compound. The polarizer 101 contains a radical scavenger. The urea compound is at least one selected from the group consisting of urea, urea derivatives, thiourea, and thiourea derivatives. The radical scavenger is a hindered amine compound.SELECTED DRAWING: Figure 1