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Liquid crystal composition and liquid crystal display element using same

A liquid crystal composition and compound technology, applied in liquid crystal materials, chemical instruments and methods, instruments, etc., can solve problems such as uneven display, burn-in of liquid crystal display elements, etc., and achieve high voltage retention and excellent display quality.

Active Publication Date: 2020-01-21
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the stability against external stimuli is impaired, the liquid crystal display element will have poor display such as screen burn-in and display unevenness

Method used

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  • Liquid crystal composition and liquid crystal display element using same
  • Liquid crystal composition and liquid crystal display element using same
  • Liquid crystal composition and liquid crystal display element using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4、 comparative example 1～5

[0646] The composition (LC-A) shown below was prepared.

[0647] The liquid crystal composition of the following LC-A was prepared, and its physical property value was measured. The composition of the liquid crystal composition and the results of its physical properties are shown in the table.

[0648] The liquid crystal composition of the following LC-A was prepared, and its physical property value was measured. The composition of the liquid crystal composition and the results of its physical properties are shown in the table.

[0649] Table 1

[0650] LC-A 3-Ph-Ph-1 8 3-Cy-Cy-V 29 3-Cy-Cy-2 4 3-Cy-1O-Ph5-O1 3 3-Cy-1O-Ph5-O2 7 2-Cy-Cy-1O-Ph5-02 13 3-Cy-Cy-1O-Ph5-O2 13 4-Cy-Cy-1O-Ph5-O2 7 V-Cy-Cy-1O-Ph5-O2 6 3-Ph-Ph5-Ph-1 4 3-Ph-Ph5-Ph-2 6 total(%) 100 T NI [℃]

76 Δn 0.098 gamma 1 [mPa s]

89 Δε -3.7

[0651] With respect to 100 parts by mass of the liquid crys...

Embodiment 5～8、 comparative example 6～10

[0656] The composition (LC-B) shown below was prepared.

[0657] The liquid crystal composition of the following LC-B was prepared, and its physical property value was measured. The composition of the liquid crystal composition and the results of its physical properties are shown in the table.

[0658] table 3

[0659] LC-B 3-Cy-Cy-V 20 3-Cy-Cy-V1 10 C-Cy-Ph-Ph-3 10 3Cy-1O-Ph5-O2 8 1V-Cy-1O-Ph5-O1 4 1V-Cy-1O-Ph5-O2 4 3-Cy-Cy-1O-Ph5-O2 9 V-Cy-Cy-1O-Ph5-O2 12 1V-Cy-Cy-1O-Ph5-O1 5 1V-Cy-Cy-1O-Ph5-O2 5 3-Ph-Ph5-Ph-1 5 3-Ph-Ph5-Ph-2 8 total(%) 100 T NI [℃]

91 Δn 0.115 gamma 1 [mPa s]

121 Δε -4.0

[0660] With respect to 100 parts by mass of liquid crystal composition LC-B, add the formula (A-3), formula (A-5), formula (B-3) and formula (B-5) represented by the ratio shown in the following table Compounds, measured resistivity values ​​and VHR. The result is ...

Embodiment 9～12、 comparative example 11～15

[0665] The composition (LC-C) shown below was prepared.

[0666] The following LC-C liquid crystal compositions were prepared, and their physical properties were measured. The composition of the liquid crystal composition and the results of its physical properties are shown in the table.

[0667] The following LC-C liquid crystal compositions were prepared, and their physical properties were measured. The composition of the liquid crystal composition and the results of its physical properties are shown in the table.

[0668] table 5

[0669] LC-C 3-Cy-Cy-V1 12 3-Cy-Cy-2 16 1V-Cy-Cy-1O-Ph5-O2 6 1-Ph-2-Ph-Ph5-O2 4 3-Ph-2-Ph-Ph5-O2 6 3-Cy-Ph5-O2 13 3-Ph-Ph5-O2 13 2-Cy-Cy-Ph5-O2 7 3-Cy-Cy-Ph5-O2 7 2-Cy-Ph-Ph5-O2 8 3-Cy-Ph-Ph5-O2 8 total(%) 100 T NI [℃]

76 Δn 0.114 gamma 1 [mPa s]

117 Δε -4.4

[0670] With respect to 100 parts by mass of the liquid crystal composi...

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PUM

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Abstract

Provided are: a liquid crystal composition containing at least one type of hindered amine-based light stabilizer having at least one unpaired electron in the molecules thereof; and a liquid crystal display element using said liquid crystal composition. This crystal composition is stable against heat and light, has a high specific resistance value, and has a high voltage holding ratio (VHR (UV)) after UV irradiation. In addition, a display element using this liquid crystal composition is extremely practical as a liquid crystal composition for liquid crystal displays and can provide excellent display quality having no display defects or suppressed display defects and fast response speed.

Description

technical field [0001] The present invention relates to a liquid crystal composition useful as an electro-optical liquid crystal display material. Background technique [0002] Liquid crystal display devices are used in various measuring devices represented by clocks and calculators, automotive panels, word processors, electronic notebooks, printers, computers, televisions, clocks, advertising display boards, etc. Representative liquid crystal display methods include TN (twisted nematic) type, STN (super twisted nematic) type, and VA (vertucally aligned) type that uses TFT (thin film transistor: thin film transistor) and is characterized by vertical alignment. , IPS (in-plane switching) type / FFS (fringe field switching) type characterized by horizontal orientation, etc. [0003] Among these display methods, IPS type, ECB type (Electrically Controlled Birefringence), VA type, or CSH (color super homeotropic) type etc. are characterized by using a liquid crystal material exhi...

Claims

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Application Information

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IPC IPC(8): C09K19/54C09K19/12C09K19/14C09K19/16C09K19/18C09K19/20C09K19/22C09K19/30C09K19/32C09K19/34G02F1/13
CPCC09K19/12C09K19/14C09K19/16C09K19/18C09K19/20C09K19/22C09K19/30C09K19/32C09K19/34C09K19/54G02F1/13
Inventor 小林笃生山口英彦原智章
Owner DIC CORP
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