Negative liquid crystal compound and display device comprising same

A technology of liquid crystal composition and negative liquid crystal, applied in liquid crystal materials, instruments, nonlinear optics, etc., can solve problems such as poor display, electrostatic discharge crown ether dosage, excessive current of liquid crystal display, etc., and achieve suitable optical anisotropy , high-definition highlights, and the effect of reducing image afterimages

Active Publication Date: 2015-07-15
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Generally speaking, the electrostatic discharge time depends on the amount of crown ether added. It is well known to those skilled in the art that if the amount of crown ether used in the liquid crystal composition is too large, the current of the liquid crystal display will be too large and the display will be poor.
[0012] Therefore, there is an urgent need for a negative liquid crystal composition comprising an antistatic agent to solve the problem of electrostatic discharge of VA-type liquid crystal displays and the excessive use of crown ether, resulting in excessive current and poor display of liquid crystal displays.

Method used

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  • Negative liquid crystal compound and display device comprising same
  • Negative liquid crystal compound and display device comprising same
  • Negative liquid crystal compound and display device comprising same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Prepare liquid crystal composition LC-1, as shown in Table 2:

[0081] Table 2LC-1 liquid crystal composition formula

[0082] component code

[0083] The physical parameters of the liquid crystal composition LC-1 are: Δn: 0.09, Δε: -4.0, Cp: 100°C.

[0084] In the liquid crystal composition LC-1, different contents of crown ethers of formula IV-1 with the following structure are added:

[0085]

[0086] The current power consumption and static electricity disappearing time of the liquid crystal composition added with the crown ether of formula IV-1 were tested, as shown in Table 3:

[0087] Table 3 Current consumption and static electricity disappearing schedule

[0088] Crown ether content / ppm

[0089] Compounds of formula IV-1 and formula V

[0090]

[0091] Form a mixture according to the ratio of 1:1, add it to the liquid crystal composition LC-1, and test the current power consumption and static disappearance time of the liquid crystal...

Embodiment 2

[0096] Prepare liquid crystal composition LC-2, as shown in Table 5:

[0097] Table 5LC-2 liquid crystal composition formula

[0098] component code

[0099] The physical parameters of the liquid crystal composition LC-2 are: Δn: 0.08, Δε: -8.5, Cp: 100°C.

[0100] In the liquid crystal composition LC-2, the crown ether of formula IV-3 with the following structure is added in different contents:

[0101]

[0102] The current power consumption and static electricity disappearing time of the liquid crystal composition added with the crown ether of formula IV-3 are tested, as shown in Table 6:

[0103] Table 6 Current consumption and static electricity disappearing schedule

[0104] Crown ether content / ppm

[0105] Compounds of formula IV-3 and formula V

[0106]

[0107] Form a mixture according to the ratio of 1:1, add it to the liquid crystal composition LC-2, and test the current power consumption and static disappearance time of the liquid crysta...

Embodiment 3

[0112] Prepare liquid crystal composition LC-3, as shown in Table 8:

[0113] Table 8 LC-3 liquid crystal composition formula

[0114] component code

[0115] The physical parameters of the liquid crystal composition LC-3 are: Δn: 0.055, Δε: -3, Cp: 104°C.

[0116] In the liquid crystal composition LC-3, the crown ether of formula IV-6 with the following structure is added in different contents:

[0117]

[0118] The current power consumption and static electricity disappearing time of the liquid crystal composition added with the crown ether of formula IV-6 were tested, as shown in Table 9:

[0119]Table 9 Current consumption and static disappearance timetable

[0120] Crown ether content / ppm

[0121] Compounds of formula IV-6 and formula V

[0122]

[0123] The mixture was formed according to the ratio of 1:1, added to the liquid crystal composition LC-3, and the current consumption and static disappearance time of the liquid crystal composition ...

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Abstract

The invention provides a negative liquid crystal composition comprising: at least one compound represented by the general formula I and used as a first ingredient; at least one compound represented by the general formula II and used as a second ingredient; and a 1-2000 ppm antistatic agent comprising at least one crown ether compound and a compound represented by the formula V. The negative liquid crystal composition can effectively reduce the current power consumption, reduce the electrostatic discharge time, and greatly reduce risks of generation of image ghost shadow, image display unevenness and other display poor problems. The invention also provides a liquid crystal display comprising the negative liquid crystal composition.

Description

technical field [0001] The present invention relates to a liquid crystal composition, in particular to a negative liquid crystal composition containing an antistatic agent and its application in a liquid crystal display device. Background technique [0002] Liquid crystal display elements can be used in various household electrical appliances including clocks and electronic calculators, measuring equipment, automotive panels, word processing agents, computers, printers, televisions, and the like. As a night scene display method, representative methods include PC (phase change, phase change), TN (twist nematic, twisted nematic), STN (super twisted nematic, super twisted nematic), ECB (electrically controlled nematic) birefringence, electronically controlled birefringence), OCB (optically compensated bend, optically compensated bend), IPS (in-plane switching, coplanar transition), VA (vertical alignment, vertical alignment), CSH (color super homeotropic, color super vertical p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44C09K19/46G02F1/1333
Inventor 陈晶晶宋晓龙韩文明李薇毛良良
Owner JIANGSU HECHENG DISPLAY TECHCO
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