Nematic liquid crystal composition

Abstract

The invention provides a nematic liquid crystal composition, which comprises 5 to 50 weight percent of nematic liquid crystal composition represented by a formula I, wherein R1 is an alkyl having 1 to 12 carbon atoms or an group formed by substituting a -CH=CH- for one or two nonadjacent groups of the alkyl; and L1, L2, L3 and L4 are Hs or Fs independent from one another; M is F, -CN, -OCF3 or -OCHF2. The composition of the invention has excellent performance and extremely short total response time (ttot=ton+toff), particularly excellent response in a low temperature state, such as 30 DEG C below zero. In addition, the composition has high phase-transition temperature, a clearing point up to 12 DEG C and excellent temperature dependence and can be used in 16 channels at a working temperature of between 40 and 80 DEG C below zero and TN-LCDs at a temperature of below 40 and 80 DEG C below zero.

Description

technical field [0001] The invention relates to a nematic liquid crystal composition, in particular to a composition with low viscosity, small elastic coefficient ratio K33 / K11, wide phase transition temperature range and good viewing angle characteristics. It can be used to manufacture fast-response TN-LCD. The working temperature range of this product can reach -40~80℃, and because of the small elastic coefficient ratio K33 / K11, it can realize the driving of 16 channels and below. Background technique [0002] Liquid crystal display (LCD), as an important application of liquid crystal—a special material, has been widely concerned since the discovery of liquid crystal properties. In recent decades, especially in the past ten years, with the rapid development of information technology and people's constant pursuit of information display methods, liquid crystal display has achieved the most rapid development. Today, liquid crystal displays are being displayed in front of peo...

AI Technical Summary

Problems solved by technology

[0013] 4. Frequency and temperature dependence of low threshold voltage

[0014] Since the components of the mixed liquid crystal material affect the performance requirements in opposite ways, it is difficult to achieve an ideal combination of parameters, and further optimization is required in terms of monomer selection and component distribution ratio

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