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Liquid crystal medium composition

A technology of liquid crystal medium and composition, which is applied in the field of liquid crystal display devices, can solve problems such as the decrease in contrast of liquid crystal panels, achieve the effects of improving contrast and optical effects, and avoiding poor alignment of liquid crystals

Active Publication Date: 2015-03-25
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of Monomer containing two polymerizable groups can easily make the PSVA panel produce bright spots that are visible in the dark state, such as image 3 As shown, the contrast of the LCD panel is reduced

Method used

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  • Liquid crystal medium composition
  • Liquid crystal medium composition
  • Liquid crystal medium composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The component contents involved in this embodiment are given according to the contents specified in Table 1 and Table 2.

[0040] Step 1. Add the single-polymerization-based monomer with the structure described in formula (3) and the double-polymerized-based monomer with the structure described in formula (4) to T ni 75°C, △n is 0.095 (25°C, 589nm), △ε is -2.8 (25°C, 1kHz) in the mixture of negative liquid crystal material and stabilizer, so as to form a uniform liquid crystal medium composition;

[0041]

[0042] Among them, the molecular weight of the single polymeric monomer corresponding to the formula (3) is 316, and the molecular weight of the double polymeric monomer corresponding to the formula (4) is 364.

[0043] Step 2: Drop the liquid crystal medium composition formed in step 1 on the prepared thin film transistor array substrate by ODF method, then combine the thin film transistor array substrate with the CF substrate, and then solidify the frame glue to...

Embodiment 2

[0046] The component contents involved in this embodiment are given according to the contents specified in Table 1 and Table 2.

[0047] Step 1. Add the single-polymerization-based monomer with the structure described in formula (5) and the double-polymerized-based monomer with the structure described in formula (6) to T ni 75°C, △n is 0.095 (25°C, 589nm), △ε is -2.8 (25°C, 1kHz) in the mixture of negative liquid crystal material and stabilizer, so as to form a uniform liquid crystal medium composition;

[0048]

[0049] Among them, the molecular weight of the monopolymeric monomer corresponding to the formula (5) is 250, and the molecular weight of the tripolymeric monomer corresponding to the formula (6) is 424.

[0050] Step 2: Drop the liquid crystal medium composition formed in step 1 on the prepared thin film transistor array substrate by ODF method, then combine the thin film transistor array substrate with the CF substrate, and then solidify the frame glue to form a...

Embodiment 3

[0053] The component contents involved in this embodiment are given according to the contents specified in Table 1 and Table 2.

[0054] Step 1. Add the single-polymerization-based monomer with the structure described in formula (7), the double-polymerized-based monomer with the structure described in formula (8), and the tri-polymerized-based monomer with the structure described in formula (9) into T ni 75°C, △n is 0.095 (25°C, 589nm), △ε is -2.8 (25°C, 1kHz) in the mixture of negative liquid crystal material and stabilizer, so as to form a uniform liquid crystal medium composition;

[0055]

[0056]

[0057] Among them, the molecular weight of the single polymeric monomer corresponding to the formula (7) is 254, the molecular weight of the double polymeric monomer corresponding to the formula (8) is 282, and the molecular weight of the tripolymeric monomer corresponding to the formula (9) is 372.

[0058] Step 2: Drop the liquid crystal medium composition formed in ste...

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Abstract

Disclosed is a liquid crystal medium composition, comprising a negative type liquid crystal material, a stabilizer, a reactive monomer that performs a polymerization reaction under ultraviolet irradiation. The reactive monomer accounts for 0.1%-1% of the liquid crystal medium composition in terms of weight. The reactive monomer at least comprises a reactive monomer described in general formula (1) and a reactive monomer described in general formula (2), and the reactive monomer described in general formula (1) accounts for 5%-85% of the total amount of the reactive monomer in terms of mole ratio. A single polymerization monomer and a poly polymerization monomer in the liquid crystal medium composition of the present invention form a polymer through a reaction under the ultraviolet irradiation, and the reaction speed is moderate, thereby avoiding the oversized volume of polymer granules and loose accumulation, preventing the occurrence of adverse orientation of liquid crystal and a bright dot phenomenon of a liquid crystal panel in dark state, and improving the contrast and optical effect of a liquid crystal display device.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display devices, in particular to a liquid crystal medium composition applied to a liquid crystal display device. Background technique [0002] The liquid crystals used in twisted nematic (Twisted nematic, TN) or STN (Super twisted nematic) liquid crystal display devices are positive liquid crystals. Among them, STN refers to the use of an electric field to change the arrangement of liquid crystal molecules that were originally twisted by more than 180 degrees to change the optical rotation state. When the positive liquid crystal is not powered, the long axis of the liquid crystal molecules is parallel to the surface of the substrate. The alignment direction of the liquid crystal molecules on the substrate surface is determined by the rubbing direction of the alignment layer. Since the alignment directions of the two substrate surfaces are vertical, the molecules of the liquid crystal laye...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/56C08F220/22C08F222/18
CPCC09K19/322C09K2019/3009C09K2019/122C08F222/18C09K19/56C09K2019/0448C08F220/22C09K19/062
Inventor 钟新辉
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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