Positive dielectric liquid crystal composition

A liquid crystal composition, positive dielectric technology, applied in liquid crystal materials, chemical instruments and methods, etc., to achieve high resistivity and voltage retention, appropriate dielectric anisotropy, and low voltage effects

Active Publication Date: 2014-05-28
BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far there is no single liquid crystal material used alone in liquid crystal displays that can me

Method used

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  • Positive dielectric liquid crystal composition
  • Positive dielectric liquid crystal composition
  • Positive dielectric liquid crystal composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] The liquid crystal composition of this embodiment was prepared according to the compound ratio of each component listed in the table below, and filled between the two substrates of the liquid crystal display for performance testing.

[0075]

[0076]

[0077] The performance parameters of the liquid crystal composition of embodiment 1 are as follows:

[0078]

Embodiment 2

[0080] The liquid crystal composition of this embodiment was prepared according to the compound ratio of each component listed in the table below, and filled between the two substrates of the liquid crystal display for performance testing.

[0081]

[0082] The performance parameters of the liquid crystal composition of embodiment 2 are as follows:

[0083]

Embodiment 3

[0085] The liquid crystal composition of this embodiment was prepared according to the compound ratio of each component listed in the table below, and filled between the two substrates of the liquid crystal display for performance testing.

[0086]

[0087]

[0088] The performance parameters of the liquid crystal composition of embodiment 3 are as follows:

[0089]

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PUM

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Abstract

The invention discloses a positive dielectric liquid crystal composition which comprises the following components in percentage by weight: 1-40 percent of a first component represented by a general formula I, 1-70 percent of a second component represented by a general formula II, 1-40 percent of a third component represented by a general formula III, 0-40 percent of a fourth component represented by a general formula IV and 0-40 percent of a fifth component represented by a general formula V, wherein an optical rotation component which is 0-0.5 percent of the total weight of the five components can be added according to a display requirement. The liquid crystal composition disclosed by the invention has a large nematic phase temperature range, proper positive dielectric anisotropism and proper optical anisotropism; due to the adjustment of the contents of all the components, liquid crystal mixtures with different threshold values, different clearing points and different birefringence characteristics can be expanded; the positive dielectric liquid crystal composition is particularly suitable for manufacturing of an active matrix TN-TFT and an IPS-TFT display with quick response.

Description

technical field [0001] The invention relates to a liquid crystal composition, in particular to a positive dielectric liquid crystal composition used in liquid crystal displays. Background technique [0002] Liquid crystal display elements are divided into the following modes according to the display mode: twisted nematic (TN) mode, super twisted nematic (STN) mode, in-plane mode (IPS), and vertical alignment (VA) mode. Regardless of the display mode, the liquid crystal composition needs to have the following characteristics: 1) Stable chemical and physical properties; 2) Low viscosity; 3) Appropriate dielectric anisotropy Δε; 4) Appropriate refraction rate Δn; 5) Good compatibility with other liquid crystal compounds. [0003] With the maturity of TFT (Thin Film Transistor) technology in the early 1990s, color LCD flat panel displays developed rapidly. In less than ten years, TFT-LCD (Thin Film Transistor Liquid Crystal Display) has rapidly grown into a mainstream display, ...

Claims

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Application Information

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IPC IPC(8): C09K19/44C09K19/30
Inventor 华瑞茂史子谦李雅敏张建立孟劲松
Owner BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD
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