17 results about "Dichroic dye" patented technology

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.

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.

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.

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.

This provides a dimmable sheet that allows for a clear and visible contrast between transparent and opaque states. [Solution] The dimming sheet 10 comprises a dimming layer 11 comprising an organic polymer layer having a plurality of voids and a liquid crystal composition containing a liquid crystal compound and a dichroic dye, a first transparent electrode layer 12A and a second transparent electrode layer 12B, and a first transparent support layer 13A and a second transparent support layer 13B. The dimming sheet 10 changes the orientation of the liquid crystal compound and the dichroic dye in response to a change in the potential difference between the first transparent electrode layer 12A and the second transparent electrode layer 12B, thereby switching from a transparent state to a colored opaque state. The dichroic dye appears black in the opaque state. The parallel line transmittance PTa in the opaque state and the parallel line transmittance PTb in the transparent state satisfy PTb / PTa > 80. The parallel line transmittance PTa in the opaque state is 0.6% or less. The total light transmittance in the opaque state is 30% or less.

The application relates to the technical field of electro-optical functional devices and smart materials, in particular to a smart light-adjusting vehicle window based on liquid crystal color-changing technology and a preparation method thereof. The vehicle window comprises a glass substrate, a transparent conductive layer, a liquid crystal composite material functional layer, a polyvinyl butyral interlayer and a packaging sealing structure. The glass substrate is subjected to chemical toughening treatment and is coated with the transparent conductive layer. A liquid crystal composite prepolymer containing liquid crystals, polymerizable monomers, dichroic dyes and modified nanoparticles is prepared. The prepolymer is coated, film-coated and pre-pressed to form a pre-assembled body. Polymerization is carried out by controlling the temperature and the ultraviolet light intensity in stages to construct a required microstructure. Edge sealing and hot-press laminating integration are carried out. The application solves the technical problem that traditional light-adjusting vehicle windows are difficult to simultaneously have high light transmittance, low haze, fast response and high contrast, the structure is reliable and the smart touch display can be integrated.

Provided is a dichroic dye, which has a structure shown in the following formula 1 by design, formula 1: the molecular skeleton structure shown in formula 1 is long rod linear conjugation, can be oriented along an electric field in a liquid crystal, makes the dye molecules synchronous directional arrangement along with the arrangement orientation of the host liquid crystal molecules, and has a high dichromatic ratio; in addition, the dichroic dye has good low-temperature compatibility with liquid crystal molecules.

Laminated glazing (1) with variable light transmission by liquid crystals comprising at least a first principal glass substrate (10), a second principal glass substrate (11), at least one liquid crystal cell (2) including dichroic dyes, the cell (2) being disposed between the first and second glass substrates (10, 11), and at least one UV filter (3) blocking UV up to 380 nm, characterized in that the laminated glazing further comprises a first filter element (5) that filters visible light in the wavelength range A from 380 to 450 nm, and a second filter element (6) that filters visible light in the wavelength range B from 451 to 700 nm, such that the laminated glazing, in its clear state at maximum light transmission, exhibits an average transmission T(A) of less than 30% over the wavelength range A, an average transmission T(B) of 0.1 to 40% over the B wavelength range,and colorimetric transmission coordinates a* from -6 to 5, preferably from -4 to 0, and b* from -5 to 5, preferably from -3 to 3.

The present application relates to the technical field of light control film, and in particular to a high-contrast anthraquinone dye PDLC composition and light control film, which comprises dichroic dye liquid crystal, photocuring glue and spacer, wherein the dichroic dye liquid crystal comprises nematic liquid crystal and dichroic dye, and the dichroic dye at least comprises one compound selected from the following formula I, formula II, formula III, formula IV or formula V. The present application introduces a new type of anthraquinone dichroic dye with optimized molecular configuration, overcomes the defects of the existing dye in the degree of orientation and solubility, and improves the contrast of the anthraquinone dye in the liquid crystal. The PDLC light control film prepared from the composition has high contrast and excellent thermal / hue stability.

The invention discloses a dye liquid crystal compound, a liquid crystal composition and application thereof. The dye liquid crystal compound has a structure as shown in the following formula I, R1 represents alkyl with the carbon atom number of 1-20, alkoxy with the carbon atom number of 1-20, alkenyl with the carbon atom number of 2-20 or alkenyloxy with the carbon atom number of 2-20, any one or more disconnected-CH2-can be replaced by cyclopropylidene, cyclobutyl, cyclopentadiene or cyclopentadiene, and any one or more unconnected-CH2-can be replaced by cyclopropylidene, cyclobutyl, cyclopentadiene or cyclopentadiene. In addition, one or more H atoms may be replaced by halogen. On the basis of having a wide near-infrared absorption band, the dye liquid crystal compound has the characteristics of good low-temperature solubility and contrast ratio and excellent electrifying heat resistance and diffusivity. The dye liquid crystal compound is used as a dichroic dye and can be used for manufacturing dimming films, dimming glass, liquid crystal display elements or liquid crystal displays and other products. I.

This invention discloses a dichroic dye with a benzothiadiazole structure, its preparation method, and its application. The dichroic dye with the benzothiadiazole structure is a compound with general formula I. General formula I is the dichroic dye disclosed in this invention, which has good dichroism and photothermal stability. The disclosed preparation method has the characteristics of simple operation, low pollution, and high yield, and is particularly suitable for industrial production.

This invention discloses a dichroic dye with a benzothiadiazole structure, its preparation method, and its application. The dichroic dye is a compound with a general formula (I-a) or (I-b), as follows: The dichroic dye disclosed in this invention has good dichroism and photothermal stability. The disclosed preparation method is characterized by simple operation, low pollution, and high yield, and is particularly suitable for industrial production.

The present application relates to the technical field of PDLC dimming film, in particular to a black dichroic dye composition, a PDLC dimming film and a preparation method and application thereof. The black dichroic dye composition comprises the following dichroic dyes: yellow anthraquinone dichroic dye, red anthraquinone dichroic dye, purple anthraquinone dichroic dye and blue anthraquinone dichroic dye; the dye molecules of the dichroic dyes all contain at least one hydroxyl substituent. The dimming film prepared from the black dichroic dye composition has an on-state transmittance of 25-35%, an off-state transmittance of 1.0%-2.5%, a transmittance contrast (T on / T off ) of 15-25 under the conditions of a total dye concentration of 4.8-6.0 wt%, a device thickness of 20 μm and a driving voltage of 60 V, and meets the requirements of high-end dimming devices for high on-off contrast.

A light control sheet includes a light control layer that contains a liquid crystal compound and a dichroic dye, and a first transparent electrode layer and a second transparent electrode layer that are a pair of transparent electrode layers sandwiching the light control layer. As viewed perpendicular to a surface of the light control sheet, the first transparent electrode layer includes a non-conductive portion extending linearly and a conductive portion divided by the non-conductive portion, and a portion of the second transparent electrode layer that is conductive overlaps with each of the conductive portion and the non-conductive portion. An average transmittance for light in an infrared range of the light control sheet in an opaque state is 64% or less.

The invention relates to a method of preparing a light valve which is operable in an optically clear and transparent state and an opaque state and which is electrically switchable between the optically clear and transparent state and the opaque state, wherein one or more polymerizable mesogenic compounds provided in a layer comprising a liquid crystalline medium are subjected to photopolymerization, the liquid crystalline medium comprising one or more mesogenic compounds, one or more chiral compounds, one or more dichroic dyes and one or more polymerizable mesogenic compounds. The invention further relates to a liquid crystalline medium for use in the method, to a light valve obtained or obtainable by carrying out the method, and to the use of the light valve in a mobile device.

The present specification discloses a substrate and uses thereof. For example, even when the substrate is applied to a device that achieves transmittance change by a liquid crystal host and a dichroic dye guest, low transmittance with respect to thickness in a blocking mode can be ensured, and occurrence of haze in the blocking mode can also be prevented. The substrate can prevent optical defects and the like that are recognized due to the color of a spacer in a transparent mode even when the spacer is implemented to be colored. For example, the substrate can be used for a device having a transmittance variable layer containing a dye.