203 results about "Dichroic dye" patented technology

The invention relates to a gray dye composition, which consists of at least one yellow dichroic dye, at least one red dichroic dye, at least one purple dichroic dye and at least one blue dichroic dye, and has uniform total absorption in a visible light region when being mixed with a parent liquid crystal composition for use. The liquid crystal composition has high contrast when applied to light valves, switchable windows, switchable mirrors and guest-host displays.

The present invention relates to a liquid crystal light modulating device comprising substrates coated with a transparent conductive layer and a liquid crystal composition sandwiched between the substrates with a dichroic dye added; the resulting liquid crystal light modulating device can exist in at least two stable states that remain substantially stable after removal of a voltage, wherein at least one of them is the liquid crystal molecules arranged in a substantially ordered manner, and at least one of them is the liquid crystal molecules arranged in a multi-domain and disordered manner; the applied voltage makes the arrangement of liquid crystal molecules can be quickly switched between the above stable states, and different liquid crystal molecule arrangements from the stable states can be obtained; the above liquid crystal light modulating device for incident light can be adjusted between the minimum absorption and minimum scattering state of high clarity and transparency to the maximum absorption and maximum scattering state of the private state, and at the same time realizes the zero-power privacy protection and zero-power clarity and transparency of the two states, and obtains the excellent regulation of the sun's radiant energy and energy-saving light modulating glass that can quickly switch between transparent and privacy-protecting states.

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 provides a high-reliability dye PDLC composition, a PDLC dimming film and a preparation method of the PDLC dimming film. The dye PDLC composition comprises the following components in percentage by weight: 35 to 67 percent of liquid crystal composition, 1 to 8 percent of dichroic dye, 30 to 60 percent of polymer precursor, 0.05 to 3 percent of photoinitiator and 0.2 to 1 percent of spacer particles. The dichroic dye comprises at least one kind of dichroic yellow dye, at least one kind of dichroic red dye, at least one kind of dichroic purple dye and at least one kind of dichroic blue dye. By selecting the specific dichroic dye, the PDLC dimming film is rich and changeable in color and particularly good in black display effect, has the high optical performance that the on-state haze is smaller than 4%, the off-state haze is larger than 95% and the contrast ratio is larger than 5, has excellent UV resistance and heat-resistant stability and is not prone to fading, and therefore the actual requirement for long-term use in various application scenes can be met.

The invention provides a dye liquid crystal composition, a liquid crystal dimming device containing the dye liquid crystal composition and application of the dye liquid crystal composition. The dye liquid crystal composition comprises at least one liquid crystal composition A and at least one dichroic dye, and the liquid crystal composition A comprises at least one compound as shown in a general formula I. According to the dye liquid crystal composition and the preparation method thereof, by adopting the compound with a specific structure as shown in the general formula I, the dye liquid crystal composition has a relatively high clearing point, relatively low rotary viscosity, a relatively large dielectric anisotropy absolute value, proper vertical dielectric, relatively low refractive index, relatively good low-temperature storage stability and relatively good low-temperature intersolubility; the liquid crystal dimming device containing the liquid crystal compound has the advantages of better contrast ratio, better transmittance, wider temperature application range, better stability, higher response speed and lower dispersion, and can reduce the glare phenomenon in the dimming fields of buildings, traffic and the like. # imgabs0 #

The invention discloses a flexible PDLC (Polymer Dispersed Liquid Crystal) dimming film based on dichroic dye as well as a preparation method and application thereof, and belongs to the technical field of photoelectric materials. The problems that the current PDLC dimming film preparation process is not environment-friendly, the operation is complicated, the flexibility is poor and the like are solved. The preparation method of the flexible PDLC dimming film comprises the following steps: (1) mixing an ultraviolet curing adhesive, a nematic phase mixed crystal, a rigid spacer and a dichroic dye to obtain a mixture; (2) substrate treatment; and (3) filling the mixture between two flexible substrates, and curing with ultraviolet light. Volatile resin and ester plasticizers in a traditional formula are replaced with the ultraviolet curing adhesive, toxic and harmful substances are prevented from being used, the preparation process is environmentally friendly and safe, meanwhile, the conductive flexible substrate is combined with the ultraviolet curing adhesive, the limitation of a rigid substrate is broken through by means of high toughness of the ultraviolet curing adhesive, and the conductivity of the conductive flexible substrate is improved. By introducing the dichroic dye, the off-state transmittance is reduced, the contrast ratio is improved, and the long-term stability of the PDLC dimming film is enhanced.

The present invention discloses a variable tint lens and eyeglasses using the lens, wherein the variable tint lens includes a tint varying film including transparent first and second substrate layers, a liquid crystal layer, and a power supply device for supplying power to each layer of the tint varying film; a dichroic dye molecule layer is provided on a surface of liquid crystal molecules of the liquid crystal layer, and a direction in which the liquid crystal molecules are aligned in each layer of the tint varying film is adjustable with a voltage provided by the power supply device. The whole lens can adjust swiftly and features a fast response; the adjustable range is large because of the simple structure and high transmittance. Moreover, it can also enable multi-tint adjustment when a multi-layer tint varying film is used for the lens; it can also adapt to various environments.

The invention provides a dye liquid crystal dimming device which comprises a pair of transparent conductive base layers and a dye liquid crystal layer arranged between the transparent conductive base layers, and the dye liquid crystal layer is filled with at least one cholesteric liquid crystal composition, at least one elastic constant regulator and at least one dichroic dye; the dye liquid crystal layer has at least three states under an applied voltage, namely a transparent state in which incident light is transmitted to the greatest extent, a dark state in which the incident light is basically transmitted and absorbed, and a shielding state in which the incident light is basically absorbed and scattered, the dark state is still basically stable after the voltage is withdrawn, and the shielding state is still stable after the voltage is withdrawn. The transparent state and the shielding state need to be basically stable by continuously applying voltage; according to the liquid crystal dimming device, the elastic constant regulator is further added into the liquid crystal mixture, so that a dark-state non-uniform texture is eliminated, and meanwhile, the contrast ratio of the device is improved.

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 discloses a polymerizable composition, comprising one or more polymerizable liquid crystal compounds, one or more self-aligning agents, and one or more dichroic dyes. The present invention also provides a polarizing film comprising the polymerizable composition, and a preparation method and use thereof. The polarizing film prepared using the polymerizable composition has a high transmittance and a high degree of polarization, and has good 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)

A display device includes a first substrate, a transistor, a light emitting diode, an encapsulation layer, a color mixing prevention layer, a partition wall, a first color conversion layer, a second color conversion layer, and a transmission layer. The transistor is disposed on a surface of the first substrate. The light emitting diode is electrically connected to the transistor. The encapsulation layer is disposed on the light emitting diode. The color mixing prevention layer is disposed on the encapsulation layer. The partition wall is disposed on the color mixing prevention layer and includes a first opening, a second opening, and a third opening. The first color conversion layer is disposed in the first opening. The second color conversion layer is disposed in the second opening. The transmission layer is disposed in the third opening. The color mixing prevention layer includes one or more dichroic dyes.

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