Reflective polarizer, preparation method thereof, and liquid crystal display device
A polarizer and reflective technology, applied in the direction of polarizing elements, optics, instruments, etc., can solve the problems of difficult control of the preparation process, and achieve the effect of low production cost and simple production process
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[0045] figure 1 It is a schematic flow chart of the preparation method of the reflective polarizer in the embodiment of the present invention, as figure 1 As shown, this embodiment includes:
[0046] Step 101: forming a transparent dye film capable of absorbing ultraviolet light on the first substrate;
[0047] Step 102: Align the first substrate and the second substrate on which the transparent dye thin film is formed to form a liquid crystal device, and a layer comprising at least a liquid crystal polymerizable monomer, Liquid crystal layer of small molecule nematic liquid crystal and photoinitiator;
[0048] Step 103: performing heat treatment on the liquid crystal device;
[0049] Step 104: irradiating the heat-treated liquid crystal device with ultraviolet light to obtain a reflective polarizer.
[0050]In the preparation method of the present invention, a transparent dye film capable of absorbing ultraviolet light is formed on the first substrate, and the first subst...
Embodiment 1
[0073] The preparation method of the reflective polarizer of the present embodiment comprises the following steps:
[0074] Step a1: if figure 2 As shown, a first substrate 1 is provided, and the first substrate 1 may be a glass substrate or a quartz substrate. On the first substrate 1, the powdery dye capable of absorbing ultraviolet light is compressed to form a transparent dye film 2. In this embodiment, the thickness of the transparent dye film can be 10 μm; wherein, the molecular formula of the dye is as follows:
[0075]
[0076] Afterwards, a liquid crystal mixture comprising at least chiral liquid crystal polymerizable monomer 3, a small molecule nematic liquid crystal 4 and a photoinitiator is coated on the transparent dye film 2 to form a liquid crystal layer, wherein the chiral liquid crystal polymerizable monomer The molecular formula of the body is as follows:
[0077]
[0078] The small molecule nematic liquid crystal is SLC-1717, the photoinitiator is I...
Embodiment 2
[0085] The preparation method of the reflective polarizer of the present embodiment comprises the following steps:
[0086] Step b1: if figure 2 As shown, a first substrate 1 is provided, and the first substrate 1 may be a glass substrate or a quartz substrate. Dissolving powdery dye capable of absorbing ultraviolet light in an organic solvent, and coating the obtained solution on the first substrate 1 to prepare a transparent dye film 2, wherein the organic solvent can be dissolved in tetrahydrofuran, dichloromethane, acetone, etc. An organic solvent with better properties, the organic solvent used in this embodiment is tetrahydrofuran, the concentration of the solution prepared by dissolving the dye in tetrahydrofuran is 0.12-2.8wt%, specifically 1.11wt%. Wherein, the molecular formula of the dye is as follows:
[0087]
[0088] Afterwards, a liquid crystal mixture comprising at least chiral liquid crystal polymerizable monomer 3, a small molecule nematic liquid crysta...
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Abstract
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