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Positive dielectric quick response liquid crystal composition

A liquid crystal composition and fast-response technology, which is applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve the problem of resistivity reduction, and achieve the effects of low driving voltage, wide temperature adaptability range, and short total response time

Active Publication Date: 2013-10-16
BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 4) Larger dielectric anisotropy: The larger the dielectric anisotropy Δε, the smaller the threshold voltage of liquid crystal, but the ions in the liquid crystal material are easier to precipitate and become free ions, resulting in a decrease in resistivity;

Method used

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  • Positive dielectric quick response liquid crystal composition
  • Positive dielectric quick response liquid crystal composition
  • Positive dielectric quick response liquid crystal composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The present invention will be further described in detail below in conjunction with the examples.

[0035] The percentages in this manual are all mass percentages; the temperature is in degrees Celsius (°C); the specific meanings and test conditions of other symbols are as follows:

[0036] c.p. (°C) indicates the clearing point of the liquid crystal, tested by DSC quantitative method; S-N indicates the melting point (°C) from the crystal state to the nematic phase of the liquid crystal; △n is the optical anisotropy, △n=n e -n o , where n o is the refractive index of ordinary light, n e is the refractive index of extraordinary light, and the test conditions are: 589nm, 25°C; △ε is the dielectric anisotropy, △ε=ε ∥ -ε ⊥ , where ε ∥ is the dielectric constant parallel to the molecular axis, ε ⊥ is the dielectric constant perpendicular to the molecular axis, the test conditions are: 25±0.5°C, 20 micron parallel box, the test instrument is INSTEC:ALCT-IR1; τ is the re...

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PUM

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Abstract

The invention discloses a positive dielectric quick response liquid crystal composition which comprises a dielectric positive compound shown as a general formula I, a dielectric positive compound shown as a general formula II, a dielectric positive compound shown as a general formula III, a low-rotary-viscosity dielectric positive or neutral compound shown as a general formula IV, a dielectric positive compound shown as a general formula V, a dielectric positive or neutral compound shown as a general formula VI and a dielectric positive or neutral compound shown as a general formula VII. The positive dielectric quick response liquid crystal composition has properly high positive dielectric anisotropy and optical anisotropy, high resistivity and charge retention rate, low driving voltage and rotary viscosity and quick response time, is applicable to an active matrix addressing photoelectric display, and can be used for manufacturing TN-thin film transistor (TN-TFT) and IPS-TFT liquid crystal display components and liquid crystal displays in quick response.

Description

technical field [0001] The invention relates to a liquid crystal composition, in particular to a liquid crystal composition with positive dielectric fast response. Background technique [0002] Display is the process of converting electrical signals (data information) into visible light (visual information), and the device that completes the display is the Man-Machine Interface (MMI). Flat Panel Display (FPD) is currently the most popular type of display device, and Liquid Crystal Display (LCD) is the first product developed and commercialized in FPD. [0003] With the maturity of TFT technology in the early 1990s, color liquid crystal flat panel displays developed rapidly, and thin film transistor liquid crystal displays (Thin Film Transistor Liquid Crystal, TFT-LCD) have become mainstream products in LCD applications. [0004] The electrical and optical characteristics of the liquid crystal used in the liquid crystal display device directly affect the display effect. Dif...

Claims

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Application Information

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IPC IPC(8): C09K19/44C09K19/46
Inventor 孟劲松丰景义夏治国温刚贾刚刚张冠超范晓蕊华瑞茂
Owner BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD
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