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Liquid crystal mixture and liquid crystal display part containing same

A technology of liquid crystal displays and mixtures, which is applied in the direction of liquid crystal materials, instruments, chemical instruments and methods, etc., can solve the problems of not being able to obtain liquid crystal mixtures, and achieve the effects of wide driving temperature range, wide nematic phase range, and excellent response performance

Inactive Publication Date: 2009-09-02
晶宝液晶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The technical problem to be solved by the present invention is to provide a wide range of nematic phase, large negative Δε, Liquid crystal mixture with high resistivity and low viscosity at the same time

Method used

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  • Liquid crystal mixture and liquid crystal display part containing same
  • Liquid crystal mixture and liquid crystal display part containing same
  • Liquid crystal mixture and liquid crystal display part containing same

Examples

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Embodiment Construction

[0058] The present invention will be described in detail below in conjunction with the examples, but those skilled in the art know that the present invention is not limited to these examples. Meanwhile, (%) in the mixtures of the following examples and comparative examples is mass%.

[0059] In the examples, the properties measured are as follows:

[0060] Tni: upper limit temperature of nematic phase (°C)

[0061] Tcn: lower limit temperature of nematic phase (°C)

[0062] ΔT: Nematic phase temperature range (°C)

[0063] Δε: Dielectric anisotropy (25°C)

[0064] Δn: Refractive rate anisotropy (25°C)

[0065] η: Viscosity (mPa / s) (20°C)

[0066] VHR: Voltage retention rate (%) (25°C)

[0067] R: Resistivity (Ω / cm) (25°C)

[0068] In the following examples of the present invention, the abbreviated symbols in the following Table 1 are used when describing the compounds. CnH 2 n+1, CpH 2 p+1 and CmH 2 m+1 are straight-chain alkyl groups, all having respective n, p and...

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Abstract

The invention relates to a liquid crystal mixture and a liquid crystal display part containing the same. The liquid crystal mixture comprises at least two compounds with general expression of I-IV, wherein R<1> and R<2> are respectively alkyl or alkoxyl with 1to 8 carbon atoms, an alkenyl with 2 to 8 carbon atoms, an alkyl or alkoxyl with 1 to 8 carbon atoms substituted by halogen, and an alkenyl with 2 to 8 carbon atoms substituted by halogen; L<1> to L<4> are respectively H, F OR-CF3; A<1> and B<1> are respectively trans-1,4-cyclohexyl ring or 1, 4-phenylene ring, wherein the 1, 4-phenylene ring can be substituted by F or-CF<3>; and n is 0 or 1. The liquid crystal mixture has large negative dielectric anisotropy (Delta Epsilon), broad nematic phase range, high resistivity and low viscosity. Therefore, the display part using the liquid crystal mixture has low threshold voltage, low electricity consumption, high reliability and excellent response performance.

Description

technical field [0001] The present invention relates to a liquid crystal mixture, more specifically, to a liquid crystal mixture and a liquid crystal display device containing the liquid crystal mixture. Background technique [0002] Active matrix liquid crystal displays (AML-LCDs) are widely used in various fields due to the huge amount of displayed information. AM-LCD has an integrated non-linear electrical switch on each pixel, which is driven by a supply voltage of tens of milliseconds each time. As the nonlinear switching device, either a thin film transistor (TFT) or a diode, such as metal insulator metal (MIM), can be used. Especially when TFT is used, the signal can be written from the switching device of each pixel, and the pixel is isolated from the circuit, which can eliminate the influence of cross effect, and can store the charge on the pixel until the next writing, thus forming energy A good steepness can be obtained by maintaining a constant voltage applicat...

Claims

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Application Information

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IPC IPC(8): C09K19/46C09K19/08C09K19/12C09K19/32G02F1/139G02F1/1362
Inventor 熊中锋
Owner 晶宝液晶有限公司
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