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Liquid crystal composition containing bicycle-octane

A liquid crystal composition, bicyclooctane technology, applied in liquid crystal materials, chemical instruments and methods, etc., to achieve the effects of low total response time, low rotational viscosity, and fast response time

Active Publication Date: 2015-07-01
BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD
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  • 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 meet the performance requirements without developing a composition with other performance characteristics

Method used

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  • Liquid crystal composition containing bicycle-octane
  • Liquid crystal composition containing bicycle-octane
  • Liquid crystal composition containing bicycle-octane

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with specific examples. The components used in the following examples can be synthesized by known methods, such as heating, ultrasonication, suspension, etc., mixed in a prescribed proportion to prepare a liquid crystal combination material; or obtained through commercial channels.

[0023] The percentages in the present invention are percentages by weight, and the temperature is degrees Celsius (°C). The specific meanings and test conditions of other symbols are as follows:

[0024] Cp (°C) represents the clearing point of the liquid crystal. S-N represents the melting point (°C) from the crystalline state of the liquid crystal to the nematic phase. △n is optical anisotropy, no is the refractive index of ordinary light, ne is the refractive index of extraordinary light, and the test conditions are 589nm, 25℃. △ε is the dielectric anisotropy, △ε=ε ∥ -ε ⊥ , where ε ∥ is the dielectric con...

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Abstract

The invention discloses a liquid crystal composition containing bicycle-octane, belonging to the field of liquid crystal display materials. The liquid crystal composition is composed of 1-40% of a positive dielectric compound containing a component A shown in the general formula I, 2-40% of a positive dielectric compound containing a component B shown in the general formula II and / or general formula III and 10-80% of a neutral dielectric compound containing a component C shown in the general formula IV; in addition, optically active compound which is 0-0.5% of the sum of the mass of the liquid crystal composition is added. The liquid crystal composition is low in viscosity, short in response time, proper in photology, good in anisotropy, proper in dielectric anisotropy and particularly suitable for manufacturing quick-response active matrix TN-TFTs (Twisted Nematic Thin Film Transistors), IPS-TFTs (In-Plane Switching Thin Film Transistors) or FFS (Fringe Field Switching) liquid crystal display elements and liquid crystal displays.

Description

technical field [0001] The present invention relates to a class of liquid crystal materials, in particular to a dielectrically positive liquid crystal medium containing bicyclooctane compounds, which are used in liquid crystal displays, especially active matrix displays, especially in TN and IPS and FFS monitors. technical background [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 Δε; (4) Appropriate refraction rate Δn; ( 5) Good compatibility with other liquid crystal compounds. [0003] With the maturity of TFT technology in the early 1990s, color liquid crystal flat panel displays developed rapidly. In less than...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/46C09K19/44
Inventor 华瑞茂夏治国丰景义贾刚刚乔云霞
Owner BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD
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