Polymer liquid-crystal composition and liquid crystal display apparatus comprising same

Abstract

The invention discloses a polymer liquid-crystal composition. The polymer liquid-crystal composition comprises a first component, a second component and a third component, wherein the first component is selected from a group consisting of a general formula I-1, a general formula I-2 and a general formula I-3 as well as an assembly thereof; the second component is selected from a group consisting of a general formula II-1, a general formula II-2, a general formula II-3, a general formula II-4 as well as an assembly thereof; the third component is selected from a general formula III. The invention further discloses a liquid crystal display apparatus comprising the polymer liquid-crystal composition. The polymer liquid-crystal composition provided by the invention has proper refractive index anisotropy, proper dielectric anisotropy, a relatively wide nematic phase temperature range, a relatively high clearing point and relatively low RM residues, is stronger in anchoring effect of polymer RM, greatly reduces risk of bad display problems such as image ghost and uneven image display, and can be suitable for the liquid crystal display apparatus, so that the liquid crystal display apparatus has the characteristics such as good display at high temperature. The structural formula of I-1, I-2, I-3, II-1, II-2, II-3, II-4 and III are shown in the description.

Description

technical field [0001] The invention relates to a liquid crystal composition and its application, in particular to a polymerizable liquid crystal composition and its application in a liquid crystal display comprising the polymerizable liquid crystal composition. Background technique [0002] Polymer Sustained Alignment (PSA) type liquid crystal display device is a device in which a polymer structure is formed in the cell in order to control the pretilt angle of liquid crystal molecules. Liquid crystal display elements are used. [0003] The manufacture of the PSA type liquid crystal display element is carried out by the following method: the liquid crystal composition containing the liquid crystal compound and the polymerizable compound is injected between the substrates, and the polymerizable liquid crystal compound is polymerized under the state that the voltage is applied to align the liquid crystal molecules, so that The orientation of the liquid crystal molecules is fi...

AI Technical Summary

Problems solved by technology

But unfortunately, there are still many defects in the current polymerizable liquid crystal monomers. For example, the melting point of the polymerizable liquid crystal monomers recorded in US Pat. No. 6,136,225 is too high. operation, which greatly increases energy consumption, and at high temperatures, it is easy to cause defects such as uneven alignment and abnormal polymerization that seriously affect optical quality

In addition, in practical applications, various other problems also emerge in endlessly, such as: the polymerization speed is slow or fast, it is difficult to control, the residual amount after polymerization is too high, and there will be various poor display phenomena, such as afterimage, display Unequal

[0009] In addition, people have also tried to improve the performance of polymerizable liquid crystals by making polymeric liquid crystal compositions, but there are various problems in the obtained liquid crystal compositions not put into practical application

For example, Japanese patent JP2003193053 provides a polymeric liquid crystal composition with a lower melting point, but there is a serious problem of uneven alignment

U.S. Patent US6090308 provides a polymeric liquid crystal composition with a lower melting point, but there are problems such as poor stability and easy crystallization

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