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Liquid crystal medium and electro-optical display device containing same

A liquid crystal medium, liquid crystal technology, applied in optics, liquid crystal materials, nonlinear optics, etc., can solve problems such as inappropriate

Active Publication Date: 2012-07-11
MERCK PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the results achieved here are not adequate for many applications and thus make it desirable to find further optimizations

Method used

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  • Liquid crystal medium and electro-optical display device containing same
  • Liquid crystal medium and electro-optical display device containing same
  • Liquid crystal medium and electro-optical display device containing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0349] Three liquid crystal mixtures were obtained, all of which had nearly identical values ​​of clearing point, birefringence, dielectric anisotropy and even rotational viscosity, but were different in the calculated peak time or predicted response time (t max or t max / Δn 2 ) are significantly different in value. Mixture M-2 is a mixture consisting of equal parts M-1 and M-3. The composition of the mixture is shown in the table below and the results of the study are in the next table.

[0350] Table 1a:

[0351]

[0352] Table 1b:

[0353]

[0354] Remark:

[0355] n.d.: not determined

[0356] As can be seen from the results, according to the teachings of the present invention, with the predicted response time t max or t max / Δn 2 In parallel, the response time of the liquid crystal display decreases significantly from Example 1-1 via Example 1-2 to Example 1-3.

Embodiment 2

[0358]Three liquid crystal mixtures were obtained, all of which had almost the same clearing point, birefringence, dielectric anisotropy, rotational viscosity and even calculated peak time or response time (t max or t max / Δn 2 ), but their compositions differ significantly. Mixture M-5 is a mixture consisting of equal parts of M-4 and M-6. The composition of the mixture is shown in the table below and the results of the study are in the next table.

[0359] Table 2a:

[0360]

[0361] Table 2b:

[0362]

[0363] Remark:

[0364] n.d.: not determined

[0365] As can be seen from the results, all three mixtures of this example, according to their low t max or t max / Δn 2 Numeric has a good response time.

[0366] As can also be seen from the results, according to the preferred teaching of the invention, parallel to the change in the composition of the mixture, the response time of the liquid crystal display is additionally changed from Example 2-1 via Exampl...

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Abstract

The invention relates to nematic liquid crystal media with negative dielectric anisotropy, having a peak time (tmax) as determined in the disclosure, of 0.25 ms or less and which, preferably, has a value of the quotient from the peak time and square of the double refraction (tmax / deltan<2>) of 22 ms or less, in addition to the use of said liquid crystal media in liquid crystal displays, and said liquid crystal displays.

Description

technical field [0001] The present invention relates to liquid crystal media and to their use in liquid crystal displays, and to these liquid crystal displays, in particular to the use of the ECB (Electrically Controlled Birefringence) effect using dielectrically negative liquid crystals in homeotropic actuation alignment LCD Monitor. The liquid-crystalline media according to the invention are distinguished by the particularly low response times in the displays according to the invention at the same time as the high voltage holding ratio. Background technique [0002] Displays Using the ECB Effect Except ASV (Advanced Super Vision, eg: Shigeta, Mitzuhiro and Fukuoka, Hirofumi, Article 15.2: "Development of High Quality LCDTV (Development of High Quality LCDTV)", SID 2004 International Symposium, Digest of Technical Papers (Technical Article Digest ), XXXV, Book II, pp. 754-757) displays and IPS (in-plane switching) displays (eg: Yeo, S.D., article 15.3: "A LC Display for th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/02C09K19/12C09K19/30C09K19/44G02F1/13
CPCC09K19/12C09K19/3402C09K19/44C09K19/3444C09K19/3003C09K2019/3422C09K19/02C09K19/345G02F1/13C09K19/3001C09K19/3098C09K2019/3004C09K2019/3009C09K2019/301C09K2019/3016G02F1/1393G02F1/13712
Inventor M·克拉森-梅默齐藤泉H·普拉赫樽见和明
Owner MERCK PATENT GMBH