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Lcd element
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A liquid crystal and element technology, applied in the field of transmission-scattering liquid crystal display elements, can solve problems such as increased power consumption, and achieve the effects of good scattering properties, good optical properties, and high adhesion
Active Publication Date: 2017-08-01
NISSAN CHEM IND LTD
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However, since the standard type element needs to constantly apply a voltage in order to obtain a transmissive state, it consumes a lot of power when it is used in many cases in a transparent state, such as window glass, etc.
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[0247] The following examples are given to illustrate the present invention in more detail, but are not limited thereto. Abbreviations are as follows.
[0248]
[0249] L1: MLC-6608 (manufactured by MERCK CORPORATION)
[0302] Mix D1 (3.00g, 15.3mmol), A1 (2.95g, 7.75mmol), B1 (0.94g, 6.18mmol) and C1 (0.17g, 1.57mmol) in PGME (21.2g) and react at 40°C for 24 hours, a polyamic acid solution (1) having a resin solid content concentration of 25% by mass was obtained. The number average molecular weight (Mn) of this polyamic acid was 10,100, and the weight average molecular weight (Mw) was 43,600.
Synthetic example 2
[0304] Mix D2 (3.83g, 15.3mmol), A2 (6.11g, 15.5mmol) and B1 (2.36g, 15.5mmol) in NMP (30.6g), react at 80°C for 5 hours, add D1 (3.00g, 15.3 mmol) and NMP (15.3 g), were reacted at 40 degreeC for 6 hours, and the polyamic-acid solution (2) whose resin solid content concentration was 25 mass % was obtained. Mn of this polyamic acid was 22,500, and Mw was 67,100.
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Abstract
Provided is an LCD element having excellent liquid crystalvertical alignment properties, good transparency when voltage is applied and good scattering properties when voltage is not applied, and good adhesion with the liquid crystal layer. The LCD element comprises a liquid crystal layer formed by curing a liquid crystal composition by irradiation with UV light, the liquid crystal composition comprising liquid crystals and a polymerizable compound and being disposed between a pair of substrates having electrodes. At least one of the substrates has a liquid crystal alignment film that vertically aligns the liquid crystals, the liquid crystal composition contains a compound represented by formula [1], and the liquid crystal alignment film is obtained from a liquid crystal alignment agent comprising a polymer having a side chain structure represented by formula [2-1] or formula [2-2]. (X1: formula [1-a] - formula [1-g], etc. X2, X3, X4 and X6:: single bond, etc. X5 and X7: benzene ring, etc.; X8: C1-18 alkyl group, etc.) (XA: H, etc.XB: benzene ring, etc. XC: C1-18 alkyl group) (Y1, Y2 and Y3: single bond, etc.; Y4 and Y5: benzene ring, etc.; Y6: C1-18 alkyl group, etc.) (Y7: single bond, etc. Y8: C8-22 alkyl group, etc.)
Description
technical field [0001] The present invention relates to a transmission-scattering type liquid crystal display element which exhibits a transmissive state when no voltage is applied and a scattering state when a voltage is applied. Background technique [0002] As a liquid crystal display element using a liquid crystal material, a TN (twisted nematic, Twisted Nematic) mode is actually used. This mode utilizes the optical rotation characteristics of liquid crystals to switch light, and polarizers are required when used as liquid crystal display elements. However, light utilization efficiency becomes low due to the use of polarizers. [0003] As a liquid crystal display element with high light utilization efficiency without using a polarizing plate, there is a liquid crystal display element that switches between a transmissive state (also called a transparent state) and a scattering state of the liquid crystal. Molecularly dispersed liquid crystal (also called PDLC (Polymer D...
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