[1]This application is a divisional of U.S. application Ser. No. 07/997,834, filed Dec. 29, 1992, now U.S. Pat. No. 5,387,369, which is a continuation of U.S. application Ser. No. 07/865,716, filed Apr. 8, 1992, now abandoned, which is a continuation of U.S. application Ser. No. 07/458,689, filed Jan. 5, 1990, now abandoned.
[2]The invention relates to supertwist liquid crystal displays (SLCD) having very short switching times and good gradients and angular dependencies and the new nematic liquid crystal mixtures used in these.
[3]SLCD according to the precharacterizing clause are known, for example, from EP 0,131,216 B1; DE 34 23 993 A1; EP 0,098,070 A2; M. Schadt and F. Leenhouts, 17. Freiburger Arbeitstagung Flussigkristalle (17th Freiburg Conference on Liquid Crystals) (8.-10.04.87); K. Kawasaki et al., SID 87 Digest 391 (20.6); M. Schadt and F. Leenhouts, SID 87 Digest 372 (20.1); K. Katoh et al., Japanese Journal of Applied Physics, Vol. 26, No. 11, L 1784-L 1786 (1987); F. Leenhouts et al., Appl. Phys. Lett. 50 (21), 1468 (1967); H. A. van Sprang and H. G. Koopman, J. Appl. Phys. 62 (5), 1734 (1987); T. J. Scheffer and J. Nehring, Appl. Phys. Lett. 45 (10), 1021 (1984), M. Schadt and F. Leenhouts, Appl. Phys. Lett. 50 (5), 236 (1987) and E. P. Raynes, Mol. Cryst. Liq. Cryst. Letters Volume 4 (1), pages 1-8 (1986). The term SLCD here includes any highly twisted display element having a twisting angle, according to the content, of between 160° and 360°, such as, for example, the display elements according to Waters et al. (C. M. Waters et al., Proc. Soc. Inf. Disp. (New York) (1985) (3rd Intern. Display Conference, Kobe, Japan), and the STN-LCDs (DE OS 35 03 259), SBE-LCDs (T. J. Scheffer and J. Nehring, Appl. Phys. Lett. 45 (1984) 1021), OMI-LCDs (M. Schadt and F. Leenhouts, Appl. Phys. Lett. 50 (1987), 236), DST-LCDs (EP OS 0 246 842) or BW-STN-LCDs (K. Kawasaki et al., SID 87 Digest 391 (20.6)).
[4]In contrast to standard TN displays, such SLCD are distinguished by considerably better gradients of the electrooptical characteristic line and associated better contrast values, as well as by a considerably lower angular dependency of contrast. SLCD having short switching times, especially also at lower temperatures, are of particular interest. To achieve short switching times, the viscosities of the liquid crystal mixtures in particular have hitherto been optimized using usually monotropic additives of relatively high vapor pressure. However, the switching times achieved were not adequate for every use.
[5]There is thus still a great demand for SLCD having very short switching times with a simultaneously high working temperature range, high characteristic line gradient, good angular dependency of the contrast and low threshold voltage.
[6]The invention is based on the object of providing SLCD which have the abovementioned disadvantages to only a minor degree, if at all, and at the same time have very short switching times.
[7]It has now been found that this object can be achieved if nematic liquid crystal mixtures containing the following components:
[8]a) at least one component chosen from group A, consisting of compounds of the formulae AI to AVI: см. иллюстрацию в PDF-документе wherein R1 and R2 each independently of one another are each R and
[9]R is alkyl having 1-12 C atoms, wherein one or two non-adjacent CH2 groups can also be replaced by --O--, --CH=CH--, --CO--, --O--CO-- or --CO--O--,
[10]b) at least one component chosen from group B1, consisting of the compounds of the formulae BI to BIV: см. иллюстрацию в PDF-документе wherein R1 and R2 each independently of one another have the meaning given for R, Z2 is --CH2 CH2 --, --CO--O--, --O--CO-- or a single bond and см. иллюстрацию в PDF-документе and/or at least one component chosen from group B2, consisting of the compounds of the formulae BV to BVII: см. иллюстрацию в PDF-документе wherein R1 has the meaning given for R,
[11]Z0 is --CH2 CH2 -- or a single bond and
[12]Q is см. иллюстрацию в PDF-документе wherein n is 1 to 9, X is CN or F and Y is H or F, and/or at least one component chosen from group B3, consisting of the compounds of the formulae BVIII and BIX: см. иллюстрацию в PDF-документе wherein R1 and R2 each independently of one another have the meaning given for R and см. иллюстрацию в PDF-документе is см. иллюстрацию в PDF-документе c) 10-80% by weight of a liquid crystal component C, consisting of one or more compounds having a dielectric anisotropy of more than +1.5,
[13]d) 0-20% by weight of a liquid crystal component D, consisting of one or more compounds having a dielectric anisotropy of less than -1.5 and
[14]e) an optically active component E, in an amount such that the ratio between the layer thickness (separation of the plane-parallel carrier plates) and the natural pitch of the nematic liquid crystal mixture is about 0.2 to 1.3,
[16]The invention thus relates to an SLCD having
[17]two plane-parallel carrier plates which, with an edging, form a cell,
[18]a nematic liquid crystal mixture of positive dielectric anisotropy in the cell,
[19]electrode layers with superimposed orientation layers on the insides of the carrier plates,
[20]an angle of incidence between the longitudinal axis of the molecules on the surface of the carrier plates and the carrier plates of about 1 degree to 30 degrees and
[21]a twisting angle of the liquid crystal mixture in the cell from orientation layer to orientation layer, according to the amount, of between 160° and 360°, characterized in that the nematic liquid crystal mixture contains
[22]a) at least one component chosen from group A, consisting of compounds of the formulae AI to AVI: см. иллюстрацию в PDF-документе wherein R1 and R2 each independently of one another are each R and
[23]R is alkyl having 1-12 C atoms, wherein one or two non-adjacent CH2 groups can also be replaced by --O--, --CH=CH--, --CO--, --O--CO-- or --CO--O--,
[24]b) at least one component chosen from group B1, consisting of the compounds of the formulae BI to BIV: см. иллюстрацию в PDF-документе wherein R1 and R2 each independently of one another have the meaning given for R, Z2 is --CH2 CH2 --, --CO--O--, --O--CO-- or a single bond and см. иллюстрацию в PDF-документе is см. иллюстрацию в PDF-документе and/or at least one component chosen from group B2, consisting of the compounds of the formulae BV to BVII: см. иллюстрацию в PDF-документе wherein R1 has the meaning given for R,
[25]Z0 is --CH2 CH2 -- or a single bond and
[26]Q is см. иллюстрацию в PDF-документе wherein n is 1 to 9, X is CN or F and Y is H or F, and/or at least one component chosen from Croup B3, consisting of the compounds of the formulae BVIII and BIX: см. иллюстрацию в PDF-документе wherein R1 and R2 each independently of one another have the meaning given for R and см. иллюстрацию в PDF-документе is см. иллюстрацию в PDF-документе c) 10-80% by weight of a liquid crystal component C, consisting of one or more compounds having a dielectric anisotropy of more than +1.5,
[27]d) 0-20% by weight of a liquid crystal component D, consisting of one or more compounds having a dielectric anisotropy of less than -1.5 and
[28]e) an optically active component E, in an amount such that the ratio between the layer thickness (separation of the plane-parallel carrier plates) and the natural pitch of the nematic liquid crystal mixture is about 0.2 to 1.3, and
[29]in that the nematic liquid crystal mixture has a nematic phase range of at least 60° C., a viscosity of not more than 30 mpa.s and a dielectric anisotropy of at least +5, the dielectric anisotropies of the compounds and the parameters relating to the nematic liquid crystal mixture being based on a temperature of 20° C.
[30]The invention also relates to corresponding liquid crystal mixtures for use in SLCD.
[31]The individual compounds of the formulae AI to AVI, BI to BIV and CI to CIII or other compounds which can be used in the SLCD according to the invention are either-known or can be prepared analogously to the known compounds.
[32]Preferred liquid crystal mixtures which can be used according to the invention contain one or more compounds from group A in an amount of 4% to 40%, preferably 10% to 32%. Compounds of the formula AIII to AVI are preferred. In a particularly preferred embodiment, the mixtures simultaneously contain (a) compounds of the formula AV and/or AVI and (b) compounds of the formula AIII and/or AIV. R1 and R2 preferably in each case independently of one another are n-alkyl having 1 to 7 C atoms or (trans)-n-alkenyl having 3 to 7 C atoms.
[33]The content of component(s) from group B1 is preferably 5% to 45%, particularly preferably about 10% to 40%. Components of the formulae BIII and BIV are preferred. Particularly preferred compounds of the formula BIII are those of the following part formulae: см. иллюстрацию в PDF-документе wherein R1 is CH3 --(CH2)n --O--, CH3 --(CH2)t --, trans-H--(CH2)r --CH=CH--(CH2 CH2)s --CH2 O-- or trans-H--(CH2)r)--CH=CH--(CH2 CH2)s --,
[34]R2 is CH3 --(CH2)t --,
[39]Those of the part formula см. иллюстрацию в PDF-документе wherein R1 and R2 have the abovementioned meaning, are furthermore preferred.
[40]The content of the compounds of the formula BIII of the abovementioned part formulae is preferably about 5% to 45%, particularly preferably about 10% to 35%. Particularly preferred compounds of the formula BIV are those of the following part formula: см. иллюстрацию в PDF-документе wherein R1 is CH3 --(CH2)n --O-- or trans-H--(CH2)r --CH=CH--(CH2 CH2)s --CH2 O-- and R2 is CH3 --(CH2)t --, wherein
[45]The content of these compounds or of the compounds of the formula BIV is preferably about 5% to 40%, particularly preferably about 10% to 35%.
[46]The mixtures preferably contain compounds of the formula III, in particular those of the part formula см. иллюстрацию в PDF-документе
[47]In a particularly preferred embodiment, the mixtures simultaneously contain compounds of the formulae BIII and BIV, the total content of components of group B1 being maintained.
[48]If compounds of the formulae BI and/or BIII are present, R1 and R2 preferably in each case independently of one another are n-alkyl having 1 to 7 C atoms or (trans)-n-alkenyl having 3 to 7 C atoms. Z2 is preferably a single bond. BI is particularly preferred.
[49]Mixtures according to the invention which contain one or more compounds of the formula BIV, wherein см. иллюстрацию в PDF-документе is см. иллюстрацию в PDF-документе and R1 and R2 have one of the abovementioned preferred meanings, and particularly preferably are n-alkyl having 1 to 7 C atoms, are furthermore preferred.
[50]The total content of components of group B1 is observed in each case.
[51]The content of compounds of group B2 is preferably about 5% to 45%, particularly preferably 5% to 20%. The content (preferred ranges) for BV to BVII is as follows:
[52]BV about 5% to 30%, preferably about 5% to 15%
[53]Total BVI and BVII: about 5% to 25%, preferably about 10% to 20%.
[54]Preferred compounds of group B2 are shown below: см. иллюстрацию в PDF-документе
[55]R1 is preferably n-alkyl having 1 to 7 C atoms or (trans)-n-alkenyl having 3 to 7 C atoms. Z0 is preferably a single bond. R preferably has the preferred meaning given above for R1 or is fluorine. Y is preferably fluorine.
[56]The mixtures according to the invention preferably contain one or more compounds chosen from the group consisting of BV3, BVI1 and BVII1 in a total content of about 5 to 35%.
[57]In a particularly preferred embodiment, the mixtures according to the invention contain, in addition to BV3, BVI1, BVII1 and BV2 (R=F), further terminally fluorinated compounds, for example chosen from the group consisting of: см. иллюстрацию в PDF-документе wherein R1 is preferably n-alkyl having 1 to 7 C atoms or (trans)-n-alkenyl having 3 to 7 C atoms, x is 1 or 2, y is 0 or 1 and Y is H or F.
[58]The total content of all the terminally fluorinated compounds is preferably about 5% to 65%, in particular about 15% to 40%.
[59]The content of compounds from group B3 is preferably about 5% to 30%, particularly preferably about 10% to 20%. R1 is preferably n-alkyl or n-alkoxy having in each case 1 to 9 C atoms. R2 is preferably n-alkyl having 1 to 9 C atoms. However, analogous compounds with alkenyl or alkenyloxy groups can also be employed. Compounds of the formula BVIII are preferred. см. иллюстрацию в PDF-документе is preferably 1,4-phenylene.
[60]The mixtures according to the invention contain compounds of at least one of the groups B1, B2 and B3. Preferably, they contain one or more compounds from group B1 and one or more compounds from groups B2 and/or B3.
[61]The content of compounds of component C is preferably about 10% to 80%, in particular about 20% to 70%. The expert can easily adjust this content to establish the desired threshold voltage, it being possible on principle to use all the customary liquid crystal compounds of Δ.di-elect cons.>+1.5. If predominantly less highly positive terminally fluorinated compounds (see above) are used, the total content varies more in the above range (about 35% to 80%), whereas if terminally cyano-substituted compounds are used, the content can be lower (about 10% to 35%). Particularly preferred compounds are, in addition to the abovementioned terminally fluorinated compounds, the preferred cyano compounds mentioned below: см. иллюстрацию в PDF-документе wherein R has the meaning given in group A,
[62]Q is см. иллюстрацию в PDF-документе Z1 is см. иллюстрацию в PDF-документе a single bond, --CH2 CH2 --, --CO--O-- or --O--CO-- and см. иллюстрацию в PDF-документе is см. иллюстрацию в PDF-документе
[63]Some particularly preferred smaller groups are shown below: см. иллюстрацию в PDF-документе R1 is preferably n-alkyl having 1 to 7 C atoms, n-oxaalkyl having 3 to 7 C atoms (for example n-alkoxymethyl) or n-alkenyl having 3-7 C atoms. Y is H or fluorine; x is 1 or 2; and y is 0 or 1.
[64]Isothiocyanates, for example of the formula см. иллюстрацию в PDF-документе wherein R1 is n-alkyl having 1 to 7 C atoms or n-alkenyl having 3 to 7 C atoms, are furthermore preferred.
[65]In a particularly preferred embodiment, the mixtures according to the invention preferably contain about 5% to 20% of one or more compounds having a dielectric anisotropy of less than -1.5 (component D). Such compounds are known, for example derivatives of 2,3-dicyanohydroquinone or cyclohexane derivatives containing the structural element см. иллюстрацию в PDF-документе in accordance with DE-OS 32 31 707 and DE-OS 34 07 013.
[66]Preferably, however, compounds having the structural element 2,3-difluoro-1,4-phenylene will be chosen, for example compounds according to DE-OS 38 07 801, 38 07 861, 38 07 863, 38 07 864 or 38 07 908. Tolanes having this structural element according to International Patent Application PCE/DE 88/00133 are particularly preferred, especially those of the formulae см. иллюстрацию в PDF-документе wherein R1 and R2 each independently of one another are preferably n-alkyl having 1 to 7 C atoms or n-alkenyl having 3 to 7 C atoms and Z0 is --CH2 --CH2 -- or a single bond.
[67]The component D has the effect, in particular, of improving the gradient of the characteristic line.
[68]In a particularly preferred embodiment, the mixtures contain about 5% to 35%, particularly preferably about 10% to 20%, of liquid crystal tolane compounds. This means that lower layer thicknesses (about 5-6 μm) can be used, whereupon the switching times are shortened significantly. Particularly preferred tolanes are shown below: см. иллюстрацию в PDF-документе R1 is preferably n-alkyl having 1 to 7 C atoms, Z0 is --CH2 CH2 -- or a single bond and
[69]Q is см. иллюстрацию в PDF-документе wherein R2 is n-alkyl or n-alkoxy having in each case 1 to 7 C atoms or n-alkenyl or n-alkenyloxy having in each case 3 to 7 C atoms.
[70]In other particularly preferred embodiments, the mixtures contain
[71]30-60% by weight of component C, 20-70% by weight of compounds from groups A and B, 0-10% by weight of component D and an amount of component E which adds up to 100% by weight,
[72]a component D which contains one or more compounds with a 1-cyano-trans-1,4-cyclohexylene group or a 2,3-difluoro-1,4-phenylene group,
[73]at least two compounds of the formula AIII or AV,
[74]compounds of the formula AIII and AV,
[75]a component C which contains one or more compounds with a 4-fluorophenyl group or a 3,4-difluorophenyl group,
[76]at least one compound from the following group: см. иллюстрацию в PDF-документе wherein alkyl is a straight-chain alkyl group having 2-7 C atoms and X is H or F,
[77]one or more compounds wherein R is a trans-alkenyl or a trans-alkenyloxy group,
[78]one or more compounds chosen from the following group см. иллюстрацию в PDF-документе wherein R1 and R2 have the preferred meanings given in the case of component A and one of the two 1,4-phenylene groups can also be substituted by fluorine; the content of these compounds is 0% to 25%, preferably about 5% to 15%.
[79]The expert has available a large number of chiral doping substances, some of which are commercially available, for component E. Their choice is not critical per se.
[80]The build-up of the liquid crystal display elements according to the invention of polarizers, electrode baseplates and electrodes having a surface treatment such that the preferred orientation (director) of the liquid crystal molecules in each case adjacent thereto is usually twisted from the one electrode to the other by, according to the amount, 160° to 360° relative to one another, corresponds to the usual construction for such display elements. The term usual construction here is interpreted widely and also includes all the variations and modifications of the supertwist cell which are known from the literature, in particular also matrix display elements, as well as the display elements, containing additional magnets, according to DE-OS 2 748 738. The surface tilt angle of the two carrier plates can be identical or different. Identical tilt angles are preferred.
[81]However, an essential difference between the display elements according to the invention and those which were hitherto customary and are based on the twisted nematic cell is in the choice of liquid crystal components in the liquid crystal layer.
[82]The liquid crystal mixtures which can be used according to the invention are prepared in a manner which is customary per se. As a rule, the desired amount of the components used in the smaller amount is dissolved in the components which make up the main constituent, preferably at elevated temperature. It is also possible to mix solutions of the components in an organic solvent, for example in acetone, chloroform or methanol, and to remove the solvent again, for example by distillation, after thorough mixing.
[83]The dielectrics can also contain other additives which are known to the expert and are described in the literature. For example 0-15% of pleochroic dyestuffs can be added.
[84]The liquid crystal mixtures according to the invention can certainly additionally contain, apart from the components mentioned here, further customary components. One skilled in the art can determine by routine tests which other components can be employed and in which amounts without eliminating the advantages of the invention. Preferably, the mixtures predominantly comprise the components mentioned (more than 60% of them) and in particular almost exclusively these components (more than 80%, particularly preferably 100% of them).
[85]The following examples are intended to illustrate the invention without limiting it.
[86]The examples have the following meanings:
[88]The SLCD is driven in multiplex operation (multiplex ratio 1:100, bias 1:11, operating voltage 18.5 volts).
[89]All the temperatures above and below are given in °C. The percentage figures are percentages by weight. The values for the switching times and viscosities are based on 20° C.
EXAMPLE 1
[90]An SLCD of the OMI type having the following parameters:
[92]containing a liquid crystal mixture having the following parameters:
[95]14.7% of p-trans-4-propylcyclohexyl-benzonitrile,
[96]5% of p-trans-4-ethylcyclohexyl-benzonitrile,
[97]10.8% of p-trans-4-butylcyclohexyl-benzonitrile,
[98]6% of p-trans-4-pentylcyclohexyl-benzonitrile,
[99]5% of trans-1-p-methoxyphenyl-4-propylcyclohexane,
[100]9.8% of trans,trans-4-methoxy-4'-propylcyclohexylcyclohexane,
[101]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[102]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[103]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[104]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e,
[105]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan e,
[106]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-cyanophenyl)-ethane and
[107]0.7% of optically active 2-octyl p-(p-n-hexylbenzoyloxy)-benzoate
[108]has a switching time of Ton 73 msec and Toff 90 msec.
EXAMPLE 2
[109]An SLCD of the STN type having the following parameters:
[111]containing a liquid crystal mixture having the following parameters:
[113]and consisting of a base mixture containing
[114]21% of p-trans-4-propylcyclohexylbenzonitrile,
[115]5% of trans-1-p-methoxyphenyl-4-propylcyclohexane,
[116]6% of 2-p-ethylphenyl-5-propylpyrimidine,
[117]6% of 2-p-propylphenyl-5-propylpyrimidine,
[118]6% of 2-p-propylphenyl-5-pentylpyrimidine,
[119]4% of 2-p-ethylphenyl-5-heptylpyrimidine,
[120]4% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan
[121]4% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[122]4% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[123]5% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e,
[124]5% of 4-butyl-4'-propyl-tolane,
[125]5% of 4-pentyl-4'-propyl-tolane,
[126]5% of 4-methoxy-4'-ethyl-tolane,
[127]7% of 4-(trans-4-propylcyclohexyl)-4'-methoxy-tolane,
[128]6% of 4-(trans-4-propylcyclohexyl)-4'-ethoxy-tolane and
[129]7% of 4-(trans-4-propylcyclohexyl)-4'-propoxy-tolane
[130]and a suitable chiral component (for example 0.7% of 2-octyl p-(p-n-hexylbenzoyloxy)-benzoate) exhibits short switching times.
EXAMPLE 3
[131]An SLCD of the STN type having the following parameters:
[133]containing a liquid crystal mixture having the following parameters:
[135]and consisting of a base mixture containing
[136]13% of p-trans-4-propylcyclohexylbenzonitrile,
[137]7% of trans-1-p-methoxyphenyl-4-propylcyclohexane,
[138]15% of trans-1-p-isothiocyanato-4-propylcyclohexane,
[139]7% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[140]7% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[141]7% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[142]7% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e,
[143]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan e,
[144]9% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-cyanophenyl)-ethane
[145]5% of 4-butyl-4'-propyl-tolane,
[146]5% of 4-pentyl-4'-propyl-tolane,
[147]5% of 4-butyl-4'-pentyl-tolane,
[148]5% of 4-methoxy-4'-ethyl-tolane,
[149]and a suitable chiral component (for example 0.7% of 2-octyl p-(p-n-hexylbenzoyloxy)-benzoate) exhibits short switching times.
EXAMPLE 4
[150]An SLCD of the OMI type having the following parameters:
[152]containing a liquid crystal mixture having the following parameters:
[155]13% of p-trans-4-propylcyclohexyl-benzonitrile,
[156]14.3% of 1-(trans-4-propylcyclohexyl)-2-(p-cyanophenyl)ethane,
[157]12% of 1-(trans-4-pentylcyclohexyl)-2-(p-cyanophenyl)ethane,
[158]7% of trans,trans-4-propoxy-4'-propylcyclohexylcyclohexane,
[159]12% of trans,trans-4-ethoxy-4'-pentylcyclohexylcyclohexane,
[160]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[161]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[162]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[163]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e,
[164]5% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan e,
[165]5% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-cyanophenyl)-ethane
[166]4% of 4,4'-bis-(trans-4-propylcyclohexyl)-biphenyl,
[167]3% of 4,4'-bis-(trans-4-pentylcyclohexyl)-biphenyl and
[168]0.7% of optically active 2-octyl p-(p-n-hexylbenzoyloxy)-benzoate
[169]exhibits a switching time of Ton 92 msec and Toff 104 msec at an operating voltage of 21 volts.
EXAMPLE 5
[170]An SLCD of the OMI type having the following parameters:
[172]containing a liquid crystal mixture having the following parameters:
[175]5% of p-trans-4-propylcyclohexyl-benzonitrile,
[176]5% of p-trans-4-ethylcyclohexyl-benzonitrile,
[177]14.3% of 1-(trans-4-propylcyclohexyl)-2-(p-cyanophenyl)-ethane,
[178]12% of 1-(trans-4-pentylcyclohexyl)-2-(p-cyanophenyl)-ethane,
[179]5% of trans-1-p-methoxyphenyl-4-propylcyclohexane,
[180]10% of trans,trans-4-ethoxy-4'-pentylcyclohexyl-cyclohexane,
[181]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[182]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[183]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[184]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e,
[185]8% of 1-(trans-4-(trans-4-propylcyclohexyl)-cyclohexyl3-2-(p-fluorophenyl)-ethan e,
[186]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-cyanophenyl)-ethane and
[187]0.7% of optically active 2-octyl p-(p-n-hexylbenzoyloxy)-benzoate
[188]exhibits a switching time of Ton 79 msec and Toff 94 msec at an operating voltage of 20.5 volts.
[189]Examples of liquid crystal mixtures according to the invention which exhibit short switching times in SLCD after doping with the usual chiral components are given below:
EXAMPLE 6
[190]A liquid crystal mixture consisting of
[191]15% of p-trans-4-propylcyclohexylbenzonitrile,
[192]11% of p-trans-4-butylcyclohexylbenzonitrile,
[193]4% of trans-1-p-methoxyphenyl-4-propylcyclohexane,
[194]14% of trans,trans-4-methoxy-4'-pentylcyclohexylcyclohexane,
[195]14% of trans,trans-4-ethoxy-4'-pentylcyclohexylcyclohexane,
[196]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[197]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[198]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[199]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e,
[200]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-cyanophenyl)-ethane
[201]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan e,
[202]3% of 4,4'-bis-(trans-4-propylcyclohexyl)-biphenyl and
[203]3% of 4-(trans-4-pentylcyclohexyl)-4'-(trans-4-propylcyclohexyl)-biphenyl
[204]exhibits the following parameters:
EXAMPLE 7
[206]A liquid crystal mixture consisting of
[207]12% of p-trans-4-propylcyclohexylbenzonitrile,
[208]10% of p-trans-4-pentylcyclohexylbenzonitrile,
[209]7% of 2-p-cyanophenyl-5-propyl-1,3-dioxane,
[210]18% of trans,trans-4-propoxy-4'-propylcyclohexylcyclohexane,
[211]7% of p-fluorophenyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate,
[212]7% of p-fluorophenyl trans,trans-4-pentylcyclohexylcyclohexane-4'-carboxylate,
[213]5% of p-propylphenyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate,
[214]5% of p-pentylphenyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate,
[215]9% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[216]10% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan e and
[217]10% of 1-?trans-4-(trans-4-pentylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan
[218]exhibits the following parameters:
EXAMPLE 8
[220]A liquid crystal mixture consisting of
[221]16% of p-trans-4-propylcyclohexylbenzonitrile,
[222]11% of p-trans-4-butylcyclohexylbenzonitrile,
[223]6% of 2-p-cyanophenyl-5-ethyl-1,3-dioxane,
[224]9% of 2-p-cyanophenyl-5-propyl-1,3-dioxane,
[225]2% of 4-cyano-3-fluorophenyl p-ethylbenzoate,
[226]3% of 4-cyano-3-fluorophenyl p-propylbenzoate,
[227]8% of trans,trans-4-propoxy-4'-propylcyclohexylcyclohexane,
[228]7% of p-fluorophenyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate,
[229]7% of p-fluorophenyl trans,trans-4-pentylcyclohexylcyclohexane-4'-carboxylate,
[230]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[231]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)?sic!-e thane,
[232]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[233]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-cyanophenyl)-ethane and
[234]7% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan
[235]exhibits the following parameters:
EXAMPLE 9
[237]A liquid crystal mixture consisting of
[238]13% of p-trans-4-propylcyclohexylbenzonitrile,
[239]11% of p-trans-4-butylcyclohexylbenzonitrile,
[240]12% of p-trans-4-ethylcyclohexylbenzonitrile,
[241]19% of trans,trans-4-methoxy-4'-propylcyclohexylcyclohexane,
[242]4% of 4-(trans-4-propylcyclohexyl)-4'-methoxy-tolane,
[243]3% of 4-(trans-4-propylcyclohexyl)-4'-ethoxy-tolane,
[244]7% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[245]7% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[246]7% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[247]7% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl1-2-(p-pentylphenyl)-ethan e and
[248]10% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-cyanophenyl)-ethane
[249]exhibits the following parameters:
EXAMPLE 10
[251]A liquid crystal mixture consisting of
[252]2% of 4-cyano-3-fluorophenyl p-ethylbenzoate,
[253]3% of 4-cyano-3-fluorophenyl p-propylbenzoate,
[254]8% of 4-cyano-3-fluorophenyl p-pentylbenzoate,
[255]7% of 4-cyano-3-fluorophenyl p-(trans-4-propylcyclohexyl)-benzoate,
[256]7% of 4-cyano-3-fluorophenyl p-(trans-4-butylcyclohexyl)-benzoate,
[257]6% of 4-cyano-3-fluorophenyl p-(trans-4-pentylcyclohexyl)-benzoate,
[258]16% of trans,trans-4-methoxy-4'-propylcyclohexylcyclohexane,
[259]20% of trans,trans-4-methoxy-4'-pentylcyclohexylcyclohexane,
[260]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[261]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[262]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e and
[263]7% of 1-(trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan
[264]exhibits the following parameters:
EXAMPLE 11
[266]A liquid crystal mixture consisting of
[267]20% of p-trans-4-propylcyclohexylbenzonitrile,
[268]10% of p-trans-4-pentylcyclohexylbenzonitrile,
[269]10% of p-trans-4-ethylcyclohexylbenzonitrile,
[270]3% of 4-cyano-3-fluorophenyl p-ethylbenzoate,
[271]4% of 4-cyano-3-fluorophenyl p-propylbenzoate,
[272]7% of trans-1-p-methoxyphenyl-4-propylcyclohexane,
[273]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[274]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[275]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[276]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e,
[277]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan e and
[278]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan
[279]exhibits the following parameters:
EXAMPLE 12
[281]A liquid crystal mixture consisting of
[282]20% of p-trans-4-propylcyclohexylbenzonitrile,
[283]13% of p-trans-4-pentylcyclohexylbenzonitrile,
[284]12% of p-trans-4-ethylcyclohexylbenzonitrile,
[285]5% of 4-cyano-3-fluorophenyl p-(trans-4-propylcyclohexyl)-benzoate,
[286]8% of trans-1-p-methoxyphenyl-4-propylcyclohexane,
[287]7% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[288]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[289]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[290]5% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e,
[291]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan e and
[292]6% of 1-?trans-4-(trans-4-pentylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan
[293]exhibits the following parameters:
EXAMPLE 13
[295]A liquid crystal mixture consisting of
[296]20% of p-trans-4-propylcyclohexylbenzonitrile,
[297]7% of p-trans-4-pentylcyclohexylbenzonitrile,
[298]10% of p-trans-4-ethylcyclohexylbenzonitrile,
[299]17% of 1-(trans-4-propylcyclohexyl)-2-(p-cyanophenyl)ethane,
[300]5% of p-fluorophenyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate,
[301]5% of p-fluorophenyl trans,trans-4-pentylcyclohexylcyclohexane-4'-carboxylate,
[302]7% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[303]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[304]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[305]9% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan e and
[306]8% of 1-?trans-4-(trans-4-pentylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan
[307]exhibits the following parameters:
EXAMPLE 14
[309]A liquid crystal mixture consisting of
[310]20% of p-trans-4-propylcyclohexylbenzonitrile,
[311]10% of p-trans-4-pentylcyclohexylbenzonitrile,
[312]10% of p-trans-4-ethylcyclohexylbenzonitrile,
[313]3% of 4-cyano-3-fluorophenyl p-ethylbenzoate,
[314]4% of 4-cyano-3-fluorophenyl?sic! p-propylbenzoate,
[315]11% of trans-1-p-methoxyphenyl-4-propylcyclohexane,
[316]4% of trans-4-propylcyclohexyl trans,trans-4-propylcyclohexyl-cyclohexane-4'-carboxylate,
[317]4% of trans-4-pentylcyclohexyl trans,trans-4-propylcyclohexyl-cyclohexane-4'-carboxylate,
[318]4% of trans-4-propylcyclohexyl trans,trans-4-butyl-cyclohexyl-cyclohexane-4'-carboxylate,
[319]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[320]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane and
[321]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan
[322]exhibits the following parameters:
EXAMPLE 15
[324]A liquid crystal mixture consisting of
[325]20% of p-trans-4-propylcyclohexylbenzonitrile,
[326]10% of p-trans-4-pentylcyclohexylbenzonitrile,
[327]10% of p-trans-4-butylcyclohexylbenzonitrile,
[328]3% of 4-cyano-3-fluorophenyl p-ethylbenzoate,
[329]4% of 4-cyano-3-fluorophenyl p-propylbenzoate,
[330]11% of trans-1-p-methoxyphenyl-4-propylcyclohexane,
[331]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl3-2-(p-methylphenyl)-ethan e,
[332]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[333]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[334]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e,
[335]9% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan e and
[336]5% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-cyanophenyl)-ethane
[337]exhibits the following parameters:
EXAMPLE 16
[339]A liquid crystal mixture consisting of
[340]20% of p-trans-4-propylcyclohexylbenzonitrile,
[341]10% of p-trans-4-pentylcyclohexylbenzonitrile,
[342]10% of p-trans-4-butylcyclohexylbenzonitrile,
[343]3% of 4-cyano-3-fluorophenyl p-ethylbenzoate,
[344]4% of 4-cyano-3-fluorophenyl p-propylbenzoate,
[345]10% of trans-1-p-methoxyphenyl-4-propylcyclohexane,
[346]6% of p-fluorophenyl trans,trans-4-propylcyclohexylcyclohexane-4g-carboxylate,
[347]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[348]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[349]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[350]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e and
[351]9% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan
[352]exhibits the following parameters:
EXAMPLE 17
[354]A liquid crystal mixture consisting of
[355]20% of p-trans-4-propylcyclohexylbenzonitrile,
[356]10% of p-trans-4-pentylcyclohexylbenzonitrile,
[357]10% of p-trans-4-butylcyclohexylbenzonitrile,
[358]3% of 4-cyano-3-fluorophenyl p-ethylbenzoate,
[359]4% of 4-cyano-3-fluorophenyl p-propylbenzoate,
[360]10% of trans-1-p-methoxyphenyl-4-propylcyclohexane,
[361]6% of p-fluorophenyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate,
[362]6% of p-fluorophenyl trans,trans-4-pentylcyclohexylcyclohexane-4'-carboxylate,
[363]5% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[364]5% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[365]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[366]6% of 1-(trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e and
[367]9% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan
[368]exhibits the following parameters:
EXAMPLE 18
[370]A liquid crystal mixture consisting of
[371]20% of p-trans-4-propylcyclohexylbenzonitrile,
[372]10% of p-trans-4-pentylcyclohexylbenzonitrile,
[373]10% of p-trans-4-butylcyclohexylbenzonitrile,
[374]3% of 4-cyano-3-fluorophenyl p-ethylbenzoate,
[375]4% of 4-cyano-3-fluorophenyl p-propylbenzoate,
[376]12% of trans-1-p-methoxyphenyl-4-propylcyclohexane,
[377]5% of p-propylphenyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate,
[378]5% of p-pentylphenyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate,
[379]4% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[380]5% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[381]5% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[382]5% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e,
[383]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan e and
[384]4% of 1-?trans-4-(trans-4-pentylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan
[385]exhibits the following parameters:
EXAMPLE 19
[387]A liquid crystal mixture consisting of
[388]3% of 4-cyano-3-fluorophenyl p-ethylbenzoate,
[389]4% of 4-cyano-3-fluorophenyl p-propylbenzoate,
[390]9% of 4-cyano-3-fluorophenyl p-pentylbenzoate,
[391]4% of 4-cyano-3-fluorophenyl p-heptylbenzoate,
[392]6% of 4-cyano-3-fluorophenyl p-(trans-4-propylcyclohexyl)-benzoate,
[393]6% of 4-cyano-3-fluorophenyl p-(trans-4-butylcyclohexyl)-benzoate,
[394]19% of trans-1-p-methoxyphenyl-4-propylcyclohexane,
[395]17% of trans,trans-4-propoxy-4'-propylcyclohexylcyclohexane,
[396]6% of p-fluorophenyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate,
[397]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[398]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[399]7% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e and
[400]7% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e,
[401]exhibits the following parameters:
EXAMPLE 20
[403]A liquid crystal mixture consisting of
[404]10% of p-trans-4-propylcyclohexylbenzonitrile,
[405]3% of 4-cyano-3-fluorophenyl p-ethylbenzoate,
[406]4% of 4-cyano-3-fluorophenyl p-propylbenzoate,
[407]10% of 4-cyano-3-fluorophenyl p-pentylbenzoate,
[408]6% of 4-cyano-3-fluorophenyl p-(trans-4-propylcyclohexyl)-benzoate,
[409]4% of 4-cyano-3-fluorophenyl p-(trans-4-butylcyclohexyl)-benzoate,
[410]18% of trans-1-p-methoxyphenyl-4-propylcyclohexane,
[411]10% of trans,trans-4-propoxy-4'-propylcyclohexylcyclohexane,
[412]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[413]7% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[414]7% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan
[415]7% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e and
[416]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan e
[417]exhibits the following parameters:
EXAMPLE 21
[419]A liquid crystal mixture consisting of
[420]20% of p-trans-4-propylcyclohexylbenzonitrile,
[421]6% of p-trans-4-pentylcyclohexylbenzonitrile,
[422]3% of 4-cyano-3-fluorophenyl p-ethylbenzoate,
[423]4% of 4-cyano-3-fluorophenyl p-propylbenzoate,
[424]9% of 4-cyano-3-fluorophenyl p-pentylbenzoate,
[425]10% of trans-1-p-methoxyphenyl-4-propylcyclohexane,
[426]7% of trans-1-p-ethoxyphenyl-4-propylcyclohexane,
[427]6% of p-fluorophenyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate,
[428]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[429]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[430]7% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[431]7% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e and
[432]9% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan
[433]exhibits the following parameters:
[435]The mixtures of Examples 9 to 21 are particularly suitable for OMI uses.
[436]The following Tables 1 to 16 show the composition of the mixtures of Examples 22 to 132, the individual compounds being coded as follows:
[437]AIII1: 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-(2-p-methylphenyl)-ethan
[438]AIII2: 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-(2-p-ethylphenyl)-ethane
[439]AIII3: 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-(2-p-propylphenyl)-ethan e
[440]AIII4: 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-(2-p-butylphenyl)-ethane
[441]AIII5: 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-(2-p-pentylphenyl)-ethan e
[442]BIII1: trans,trans-4-propyl-4'-methoxy-cyclohexylcyclohexane
[443]BIII2: trans,trans-4-propyl-4'-ethoxy-cyclohexylcyclohexane
[444]BIII3: trans,trans-4-propyl-4'-propoxy-cyclohexylcyclohexane
[445]BIII4: trans,trans-4-pentyl-4'-methoxy-cyclohexylcyclohexane
[446]BIII5: trans,trans-4-pentyl-4'-ethoxy-cyclohexylcyclohexane
[447]BIII6: trans,trans-4-propyl-4'-butyryloxy-cyclohexylcyclohexane
[448]BIII7: trans-trans-4-propyl-4'-hexanoyloxy-cyclohexylcyclohexane
[449]BIII8: trans-4-propylcyclohexyl trans-4-propylcyclohexylcarboxylate
[450]BIII9: trans-4-propylcyclohexyl trans-4-pentylcyclohexylcarboxylate
[451]BIV1: trans-1-p-methoxyphenyl-4-propylcyclohexane
[452]BIV2: trans-1-p-ethoxyphenyl-4-propylcyclohexane
[453]BIV3: trans-1-p-butoxyphenyl-4-propylcyclohexane
[454]BIV4: trans-1-p-methoxyphenyl-4-pentylcyclohexane
[455]BIV5: trans-1-p-propylphenyl-4-pentylcyclohexane
[456]BIV6: trans-1-p-ethylphenyl-4-pentylcyclohexane
[457]BV1: p-fluorophenyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate
[458]BV2: p-fluorophenyl trans,trans-4-pentylcyclohexylcyclohexane-4'-carboxylate
[459]BV3: trans-4-propylcyclohexyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate
[460]BV4: trans-4-pentylcyclohexyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate
[461]BV5: trans-4-propylcyclohexyl trans,trans-4-butylcyclohexylcyclohexane-4'-carboxylate
[462]BV6: trans-4-pentylcyclohexyl trans,trans-4-butylcyclohexylcyclohexane-41-carboxylate
[463]BV7: p-propylphenyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate
[464]BV8: p-pentylphenyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate
[465]BV9: p-propylphenyl trans-trans-4-butylcyclohexylcyclohexane-4'-carboxylate
[466]BV10: p-pentylphenyl trans,trans-4-butylcyclohexylcyclohexane-4'-carboxylate
[467]BVI1: 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan e
[468]BVI2: 1-?trans-4-(trans-4-pentylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan e
[469]BVIII1: 2-p-ethylphenyl-5-propyl-pyrimidine
[470]BVIII2: 2-p-propylphenyl-5-propyl-pyrimidine
[471]BVIII3: 2-p-propylphenyl-5-pentyl-pyrimidine
[472]BVIII4: 2-p-ethylphenyl-5-heptyl-pyrimidine
[473]BVIII5: 2-p-pentyloxyphenyl-5-hexyl-pyrimidine
[474]BVIII6: 2-p-heptyloxyphenyl-5-hexyl-pyrimidine
[475]BVIII7: 2-p-nonyloxyphenyl-5-hexyl-pyrimidine
[476]BVIII8: 2-p-heptyloxyphenyl-5-heptyl-pyrimidine
[477]BVIII9: 2-p-nonyloxyphenyl-5-heptyl-pyrimidine
[478]BVIII10: 2-p-hexyloxyphenyl-5-nonyl-pyrimidine
[479]BVIII11: 2-p-nonyloxyphenyl-5-nonyl-pyrimidine
[480]C1: p-trans-4-ethylcyclohexylbenzonitrile
[481]C2: p-trans-4-propylcyclohexylbenzonitrile
[482]C3: p-trans-4-butylcyclohexylbenzonitrile
[483]C4: p-trans-4-pentylcyclohexylbenzonitrile
[484]C5: 1-(trans-4-propylcyclohexyl)-2-(p-cyanophenyl)-ethane
[485]C6: 1-(trans-4-pentylcyclohexyl)-2-(p-cyanophenyl)-ethane
[486]C7: 4-ethyl-4'-cyanobiphenyl
[487]C8: 4-propyl-4'-cyanobiphenyl
[488]C9: 4-pentyl-4'-cyanobiphenyl
[489]C10: 2-p-cyanophenyl-5-propyl-1,3-dioxane
[490]C11: 2-p-cyanophenyl-5-butyl-1,3-dioxane
[491]C12: 2-p-cyanophenyl-5-pentyl-1,3-dioxane
[492]C13: trans-1-p-isothiocyanatophenyl-4-propylcyclohexane
[493]C14: 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-cyanophenyl)-ethane
[494]C15: 4-cyano-3-fluorophenyl p-ethylbenzoate
[495]C16: 4-cyano-3-fluorophenyl p-propylbenzoate
[496]C17: 4-cyano-3-fluorophenyl p-pentylbenzoate
[497]C18: 4-cyano-3-fluorophenyl p-heptylbenzoate
[498]C19: 4-cyano-3-fluorophenyl p-(trans-4-propylcyclohexyl)-benzoate
[499]C20: 4-cyano-3-fluorophenyl p-(trans-4-butylcyclohexyl)-benzoate
[500]C21: 4-cyano-3-fluorophenyl p-(trans-4-pentylcyclohexyl)-benzoate
[501]C22: 2-(3-fluoro-4-cyanophenyl)-5-pentyl-pyrimidine
[502]C23: 2-(3-fluoro-4-cyanophenyl)-5-hexyl-pyrimidine
[503]C24: 2-(3-fluoro-4-cyanophenyl)-5-heptyl-pyrimidine
[504]F1: trans-1-p-fluorophenyl-4-pentylcyclohexane
[505]F2: trans-1-p-fluorophenyl-4-hexylcyclohexane
[506]F3: trans-1-p-fluorophenyl-4-heptylcyclohexane
[507]H1: 4-butyl-4'-propyl-tolan
[508]H2: 4-pentyl-4'-propyl-tolan
[509]H3: 4-butyl-4'-pentyl-tolan
[510]H4: 4-ethyl-4'-methoxy-tolan
[511]H5: 4-methyl-4'-ethoxy-tolan
[512]H6: 4-(trans-4-propylcyclohexyl)-4'-methoxy-tolan
[513]H7: 4-(trans-4-propylcyclohexyl)-41-ethoxy-tolan
[514]H8: 4-(trans-4-propylcyclohexyl)-4'-propoxy-tolan
[515]K1: 4-ethyl-4'-(trans-4-propylcyclohexyl)-biphenyl
[516]K2: 4-ethyl-4'-(trans-4-pentylcyclohexyl)-biphenyl
[517]K3: 4-nonyl-4'-(trans-4-pentylcyclohexyl)-biphenyl
[518]K4: 4-ethyl-4'-(trans-4-pentylcyclohexyl)-2'-fluorobiphenyl
[519]K5: 1-(trans-4-pentylcyclohexyl)-2-(4'-ethyl-2'-fluorobiphenyl-4-yl)-ethane
[520]L1: 4,4'-bis-(trans-4-propylcyclohexyl)-biphenyl
[521]L2: 4-(trans-4-pentylcyclohexyl)-4'-(trans-4-propylcyclohexyl)-biphenyl
[522]L3: 4,41-bis-(trans-4-pentylcyclohexyl)-biphenyl
[523]L4: 4,4-bis-(trans-4-propylcyclohexyl)-2-fluorobiphenyl
[524]L5: 4-(trans-4-pentylcyclohexyl)-4'-(trans-4-propylcyclohexyl)-2-fluorobipheny l
[525]L6: 4,4'-bis-(trans-4-pentylcyclohexyl)-2-fluorobiphenyl.
[526]The data for Examples 22 to 132 are to be found in Table 17.
[544]The following examples relate to further mixtures according to the invention:
EXAMPLE 133
[545]A liquid crystal mixture consisting of:
[546]14.7% of p-trans-4-propylcyclohexyl-benzonitrile,
[547]5% of p-trans-4-ethylcyclohexyl-benzonitrile,
[548]10.8% of p-trans-4-butylcyclohexyl-benzonitrile,
[549]6% of p-trans-4-pentylcyclohexyl-benzonitrile,
[550]5% of trans-1-p-methoxyphenyl-4-propylcyclohexane,
[551]9.8% of trans,trans-4-methoxy-4'-propylcyclohexylcyclohexane,
[552]8% of 1-?p-(trans-4-propylcyclohexyl)-phenyl!-2-(p-propylphenyl)-ethane,
[553]8% of 1-?p-(trans-4-pentylcyclohexyl)-phenyl!-2-(p-propylphenyl)-ethane,
[554]8% of 1-?p-(trans-4-pentylcyclohexyl)-phenyl!-2-(trans-4-propylcyclohexyl)-ethan e,
[555]8% of 1-?p-(trans-4-pentylcyclohexyl)-phenyl!-2-(trans-4-pentylcyclohexyl)-ethan e,
[556]8% of 1-(trans-4-propylcyclohexyl)-2-?trans-4-(p-cyanophenyl)-cyclohexyl!-ethane
[557]8% of p-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-fluorobenzene and
[558]0.7% of optically active 2-octyl p-(p-n-hexylbenzoyloxy)-benzoate
EXAMPLE 134
[560]A liquid crystal mixture consisting of a base mixture containing
[561]21% of p-trans-4-propylcyclohexylbenzonitrile,
[562]5% of trans-1-p-methoxyphenyl-4-propylcyclohexane,
[563]6% of 2-p-ethylphenyl-5-propylpyrimidine,
[564]6% of 2-p-propylphenyl-5-propylpyrimidine,
[565]6% of 2-p-propylphenyl-5-pentylpyrimidine,
[566]4% of 2-p-ethylphenyl-5-heptylpyrimidine,
[567]4% of 1-(trans-4-propylcyclohexyl)-2-?trans-4-(p-propylphenyl)-cyclohexyl!-ethan e,
[568]4% of 1-(trans-4-pentylcyclohexyl)-2-?trans-4-(p-propylphenyl)-cyclohexyl!-ethan e,
[569]4% of p-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-ethylbenzene,
[570]5% of 1,4-bis-(trans-4-propylcyclohexyl)-benzene,
[571]5% of 4-butyl-4'-propyl-tolane,
[572]5% of 4-pentyl-4'-propyl-tolane,
[573]5% of 4-methoxy-4'-ethyl-tolane,
[574]7% of 4-(trans-4-propylcyclohexyl)-4'-methoxy-tolane,
[575]6% of 4-(trans-4-propylcyclohexyl)?sic!-4'-ethoxytolane and
[576]7% of 4-(trans-4-propylcyclohexyl)-4'-propoxy-tolane
[577]and a suitable chiral component (for example 0.7% of 2-octyl p-(p-n-hexylbenzoyloxy)-benzoate) exhibits short switching times.
EXAMPLE 135
[578]A liquid crystal mixture consisting of:
[579]13% of p-trans-4-propylcyclohexyl-benzonitrile,
[580]14.3% of 1-(trans-4-propylcyclohexyl)-2-(p-cyanophenyl)-ethane,
[581]12% of 1-(trans-4-pentylcyclohexyl)-2-(p-cyanophenyl)-ethane,
[582]7% of 5-propyl-2-(trans-4-ethylcyclohexyl)-trans-1,3-dioxane,
[583]12% of 4-(trans-4-propylcyclohexyl)-1-propylcyclohex-1-ene,
[584]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[585]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[586]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[587]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e,
[588]5% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(3,4-difluorophenyl)-e thane,
[589]5% of 1-(trans-4-propylcyclohexyl)-2-?trans-4-(3-fluoro-4-cyanophenyl)-cyclohexy l!-ethane,
[590]4% of 4,4'-bis-(trans-4-propylcyclohexyl)-biphenyl,
[591]3% of 4,4'-bis-(trans-4-pentylcyclohexyl)-biphenyl and
[592]0.7% of optically active 2-octyl p-(p-n-hexylbenzoyloxy)-benzoate
EXAMPLE 136
[594]A liquid crystal mixture consisting of:
[595]5% of p-trans-4-propylcyclohexyl-benzonitrile,
[596]5% of p-trans-4-ethylcyclohexyl-benzonitrile,
[597]14.3% of 1-(trans-4-propylcyclohexyl)-2-(p-cyanophenyl)ethane,
[598]12% of 1-(trans-4-pentylcyclohexyl)?sic!-2-(p-cyanophenyl)-ethane,
[599]10% of trans-1-p-methoxyphenyl-4-propylcyclohexane,
[600]5% of 1,2-bis-(trans-4-propylcyclohexyl)-ethane,
[601]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[602]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[603]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[604]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e,
[605]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-3,4-difluorobenzene,
[606]8% of 4-(trans-4-propylcyclohexyl)-3'-fluoro-4'-cyanobiphenyl and
[607]0.7% of optically active 2-octyl p-(p-n-hexylbenzoyloxy)-benzoate
EXAMPLE 137
[609]A liquid crystal mixture consisting of:
[610]15% of p-trans-4-propylcyclohexylbenzonitrile,
[611]11% of p-trans-4-butylcyclohexylbenzonitrile,
[612]4% of trans-1-p-methoxyphenyl-4-propylcyclohexane,
[613]14% of trans,trans-4-methoxy-4'-pentylcyclohexylcyclohexane,
[614]14% of trans,trans-4-ethoxy-4'-pentylcyclohexylcyclohexane,
[615]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[616]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[617]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[618]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e,
[619]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-cyanophenyl)-ethane
[620]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan e,
[621]3% of 4,4'-bis-(trans-4-propylcyclohexyl)-biphenyl and
[622]3% of 2-(p-pentylphenyl)-5-propyl-pyridine
EXAMPLE 138
[624]An SLC display element having the following parameters:
[626]containing a liquid crystal mixture having the following parameters:
[629]15% of p-trans-4-propylcyclohexyl-benzonitrile,
[630]11% of p-trans-4-butylcyclohexyl-benzonitrile,
[631]11% of p-trans-4-pentylcyclohexyl-benzonitrile,
[632]5% of p-trans-4-ethylcyclohexyl-benzonitrile,
[633]7% of 2,3-difluoro-4-ethoxyphenyl trans-4-propylcyclohexanecarboxylate,
[634]6% of 2,3-difluoro-4-ethoxyphenyl trans-4-pentylcyclohexanecarboxylate,
[635]7% of 2,3-difluoro-4-ethoxyphenyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate,
[636]5% of 4-(trans-4-propylcyclohexyl)-2',3'-difluoro-4'-ethoxy-tolane,
[637]5% of 4-(trans-4-pentylcyclohexyl)-2',3'-difluoro-4'-ethoxy-tolane,
[638]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[639]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[640]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e,
[641]4% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-cyanophenyl)-ethane and
[642]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan e,
[643]exhibits a characteristic line gradient V50 /V10 of 2.7%.
[644]In an SLC display element of relatively high angle of incidence (5°), d/p=0.40, d.Δn=0.85 and a twisting angle of 220°, the same mixture exhibits a gradient V50 /V10 of 2.9% and a value β of the angular dependency of the contrast of 0.4%.
EXAMPLE 139
[645]An SLC display element having the following parameters:
[647]containing a liquid crystal mixture having the following parameters:
[650]15% of p-trans-4-propylcyclohexyl-benzonitrile,
[651]11% of p-trans-4-butylcyclohexyl-benzonitrile,
[652]11% of p-trans-4-pentylcyclohexyl-benzonitrile,
[653]5% of p-trans-4-ethylcyclohexyl-benzonitrile,
[654]7% of 2,3-difluoro-4-ethoxyphenyl trans-4-propylcyclohexanecarboxylate,
[655]6% of 2,3-difluoro-4-ethoxyphenyl trans-4-pentylcyclohexanecarboxylate,
[656]7% of 2,3-difluoro-4-ethoxyphenyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate,
[657]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[658]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[659]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e,
[660]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-cyanophenyl)-ethane and
[661]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan
[662]exhibits a characteristic line gradient V50 /V10 of 2.2%.
EXAMPLE 140
[663]An SLC display element having the following parameters:
[665]containing a liquid crystal mixture having the following parameters:
[668]15% of p-trans-4-propylcyclohexyl-benzonitrile,
[669]11% of p-trans-4-butylcyclohexyl-benzonitrile,
[670]11% of p-trans-4-pentylcyclohexyl-benzonitrile,
[671]5% of p-trans-4-ethylcyclohexyl-benzonitrile,
[672]9% of 4-propyl-2',3'-difluoro-4'-ethoxy-tolane,
[673]9% of 4-pentyl-2',3'-difluoro-4'-ethoxy-tolane,
[674]6% of 4-(trans-4-propylcyclohexyl)-2',3'-difluoro-4'-ethoxy-tolane,
[675]6% of 4-(trans-4-pentylcyclohexyl)-2',3'-difluoro-4'-ethoxy-tolane,
[676]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[677]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[678]6% of 1-?trans-4-(trans-4-propylcyclohexyl)?sic!-cyclohexyl!-2-(p-pentylphenyl)- ethane,
[679]4% of 1-?trans-4-(trans-4-propylcyclohexyl)?sic!-cyclohexyl!-2-(p-cyanophenyl)-e thane,
[680]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan e,
[681]exhibits a characteristic line gradient V50 /V10 of 3.7%.
EXAMPLE 141
[682]An SLC display element having the following parameters:
[684]containing a liquid crystal mixture having the following parameters:
[687]15% of p-trans-4-propylcyclohexyl-benzonitrile,
[688]11% of p-trans-4-butylcyclohexyl-benzonitrile,
[689]11% of p-trans-4-pentylcyclohexyl-benzonitrile,
[690]5% of p-trans-4-ethylcyclohexyl-benzonitrile,
[691]12% of 4-pentyl-2',3'-difluoro-4'-ethoxy-tolane,
[692]5% of 4-(trans-4-propylcyclohexyl)-2',3'-difluoro-4'-ethoxy-tolane,
[693]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[694]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[695]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e,
[696]4% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-cyanophenyl)-ethane and
[697]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan
[698]exhibits a characteristic line gradient V50 /V10 of 3.6%.
EXAMPLE 142
[699]An SLC display element having the following parameters:
[701]containing a liquid crystal mixture having the following parameters:
[704]15% of p-trans-4-propylcyclohexyl?sic!-benzonitrile,
[705]11% of p-trans-4-butylcyclohexyl-benzonitrile,
[706]11% of p-trans-4-pentylcyclohexyl-benzonitrile,
[707]5% of p-trans-4-ethylcyclohexyl-benzonitrile,
[708]10% of 4-pentyl-2',3'-difluoro-4-ethoxy-tolane,
[709]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e,
[710]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-ethylphenyl)-ethane
[711]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-propylphenyl)-ethan e,
[712]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-pentylphenyl)-ethan e,
[713]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-cyanophenyl)-ethane and
[714]8% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-fluorophenyl)-ethan
[715]exhibits a characteristic line gradient V50 /V10 of 4.0%.
EXAMPLE 143
[716]An SLC display element having the following parameters:
[718]containing a liquid crystal mixture having the following parameters:
[721]15% of p-trans-4-propylcyclohexyl-benzonitrile,
[722]11% of p-trans-4-butylcyclohexyl-benzonitrile,
[723]11% of p-trans-4-pentylcyclohexyl-benzonitrile,
[724]5% of p-trans-4-ethylcyclohexyl-benzonitrile,
[725]7% of 2,3-difluoro-4-ethoxyphenyl trans-4-propylcyclohexanecarboxylate,
[726]6% of 2,3-difluoro-4-ethoxyphenyl trans-4-butylcyclohexanecarboxylate,
[727]7% of 2,3-difluoro-4-ethoxyphenyl trans-4-pentylcyclohexanecarboxylate,
[728]6% of 4-propyl-2',3'-difluoro-4'-ethoxy-tolane,
[729]4% of 4-(trans-4-propylcyclohexyl)-2',3'-difluoro-4'-ethoxy-tolane,
[730]6% of 4-(trans-4-propylcyclohexyl)-4'-methoxy-tolane,
[731]5% of 4-(trans-4-propylcyclohexyl)-4'-ethoxy-tolane,
[732]7% of 4-(trans-4-propylcyclohexyl)-4'-propoxy-tolane,
[733]6% of 1-?trans-4-(trans-4-propylcyclohexyl)-cyclohexyl!-2-(p-methylphenyl)-ethan e and
[734]4% of 1-?trans-(trans-4-propylcyclohexyl)-cyclo-hexyl!-2-(p-propylphenyl)-ethane
[735]exhibits a characteristic line gradient V50 /V10 of 2.7% and an angular dependency of the contrast β=0.9%.
[736]In the tables which follow, properties and composition of the mixtures of Examples 144 to 428 are given, the individual compounds having the following code:
[737]ECCP-31: 1-?trans-4-(trans-4-propylcyclohexyl)cyclohexyl!-(2-p-methylphenyl)ethane
[738]ECCP-32: 1-?trans-4-(trans-4-propylcyclohexyl)cyclohexyl!-(2-p-ethylphenyl)-ethane
[739]ECCP-33: 1-?trans-4-(trans-4-propylcyclohexyl)cyclohexyl!-(2-p-propylphenyl)-ethane
[740]ECCP-34 1-?trans-4-(trans-4-propylcyclohexyl)cyclohexyl!-(2-p-butylphenyl)-ethane
[741]ECCP-35: 1-?trans-4-(trans-4-propylcyclohexyl)cyclohexyl!-(2-p-pentylphenyl)-ethane
[742]CCH-301: trans,trans-4-propyl-4'-methoxy-cyclohexylcyclohexane
[743]CCH-302: trans,trans-4-propyl-4'-ethoxy-cyclohexylcyclohexane
[744]CCH-303: trans,trans-4-propyl-4'-propoxy-cyclohexylcyclohexane
[745]CCH-501: trans,trans-4-pentyl-4'-methoxy-cyclohexylcyclohexane
[746]CCH-502: trans,trans-4-pentyl-4'-ethoxy-cyclohexylcyclohexane
[747]C-33: trans,trans-4-propyl-4'-butyryloxy-cyclohexylcyclohexane
[748]C-35: trans,trans-4-propyl-4'-hexanoyloxycyclohexylcyclohexane
[749]OS-33: trans-4-propylcyclohexyl trans-4-propylcyclohexanecarboxylate
[750]OS-53: trans-4-pentylcyclohexyl trans-4-propylcyclohexanecarboxylate
[751]PCH-301: trans-1-p-methoxyphenyl-4-propylcyclohexane
[752]PCH-302: trans-1-p-ethoxyphenyl-4-propylcyclohexane
[753]PCH-304: trans-1-p-butoxyphenyl-4-propylcyclohexane
[754]PCH-501: trans-1-p-methoxyphenyl-4-pentylcyclohexane
[755]PCH-53: trans-1-p-propylphenyl-4-pentylcyclohexane
[756]PCH-52: trans-1-p-ethylphenyl-4-pentylcyclohexane
[757]CP-3F: p-fluorophenyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate
[758]CP-5F: p-fluorophenyl trans,trans-4-pentylcyclohexylcyclohexane-4'-carboxylate
[759]CH-33: trans-4-propylcyclohexyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate
[760]CH-35: trans-4-pentylcyclohexyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate
[761]CH-43: trans-4-propylcyclohexyl trans,trans-4-butylcyclohexylcyclohexane-4'-carboxylate
[762]CH-45: trans-4-pentylcyclohexyl trans,trans-4-butylcyclohexylcyclohexane-41-carboxylate
[763]CP-33: p-propylphenyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate
[764]CP-35: p-pentylphenyl trans,trans-4-propylcyclohexylcyclohexane-4'-carboxylate
[765]CP-43: p-propylphenyl trans,trans-4-butylcyclohexylcyclohexane-4'-carboxylate
[766]CP-45: p-pentylphenyl trans,trans-4-butylcyclohexylcyclohexane-4'-carboxylate
[767]ECCP-3F: 1-?trans-4-(trans-4-propylcyclohexyl)cyclohexyl!-2-(p-fluorophenyl)-ethane
[768]ECCP-5F: 1-?trans-4-(trans-4-pentylcyclohexyl)cyclohexyl!-2-(p-fluorophenyl)-ethane
[769]PYP-32: 2-p-ethylphenyl-5-propyl-pyrimidine
[770]PYP-33: 2-p-propylphenyl-5-propyl-pyrimidine
[771]PYP-53: 2-p-propylphenyl-5-pentyl-pyrimidine
[772]PYP-72: 2-p-ethylphenyl-5-heptyl-pyrimidine
[773]PYP-605: 2-p-pentyloxyphenyl-5-hexyl-pyrimidine
[774]PYP-607: 2-p-heptyloxyphenyl-5-hexyl-pyrimidine
[775]PYP-609: 2-p-nonyloxyphenyl-5-hexyl-pyrimidine
[776]PYP-707: 2-p-heptyloxyphenyl-5-heptyl-pyrimidine
[777]PYP-709: 2-p-nonyloxyphenyl-5-heptyl-pyrimidine
[778]PYP-706: 2-p-Hexyloxyphenyl-5-nonyl-pyrimidine
[779]PYP-909: 2-p-nonyloxyphenyl-5-nonyl-pyrimidine
[780]PCH-2: p-trans-4-ethylcyclohexylbenzonitrile
[781]PCH-3: p-trans-4-propylcyclohexylbenzonitrile
[782]PCH-4: p-trans-4-butylcyclohexylbenzonitrile
[783]PCH-5: p-trans-4-pentylcyclohexylbenzonitrile
[784]G9=EPCH-3: 1-(trans-4-propylcyclohexyl)-2-(p-cyanophenyl)-ethane
[785]G15=EPCH-5: 1-(trans-4-pentylcyclohexyl)-2-(p-cyanophenyl)-ethane
[786]K6: 4-ethyl-4'-cyanobiphenyl
[787]K9: 4-propyl-4'-cyanobiphenyl
[788]K15: 4-pentyl-4'-cyanobiphenyl
[789]PDX-3: 2-p-cyanophenyl-5-propyl-1,3-dioxane
[790]PDX-4: 2-p-cyanophenyl-5-butyl-1,3-dioxane
[791]PDX-5: 2-p-cyanophenyl-5-pentyl-1,3-dioxane
[792]PCH-3S: trans-1-p-isothiocyantophenyl-4-propylcyclohexane
[793]ECCP-3: 1-?trans-4-(trans-4-propylcyclohexyl)cyclohexyl!-2-(p-cyanophenyl)-ethane
[794]ME-2N,F: 4-cyano-3-fluorophenyl p-ethylbenzoate
[795]ME-3N,F: 4-cyano-3-fluorophenyl p-propylbenzoate
[796]ME-5N,F: 4-cyano-3-fluorophenyl p-pentylbenzoate
[797]ME-7N,F: 4-cyano-3-fluorophenyl p-heptylbenzoate
[798]HP-3N,F: 4-cyano-3-fluorophenyl p-(trans-4-propylcyclohexyl)-benzoate
[799]HP-4N,F: 4-cyano-3-fluorophenyl p-(trans-4-butylcyclohexyl)-benzoate
[800]HP-5N,F: 4-cyano-3-fluorophenyl p-(trans-4-pentylcyclohexyl)-benzoate
[801]PYP-5N,F: 2-(3-fluoro-4-cyanophenyl)-5-pentylpyrimidine
[802]PYP-6N,F: 2-(3-fluoro-4-cyanophenyl)-5-hexylpyrimidine
[803]PYP-7N,F: 2-(3-fluoro-4-cyanophenyl)-5-heptylpyrimidine
[804]PCH-5F: trans-1-p-fluorophenyl-4-pentylcyclohexane
[805]PCH-7F: trans-1-p-fluorophenyl-4-hexylcyclohexane trans-1-p-fluorophenyl-4-heptylcyclohexane
[806]PTP-34: 4-butyl-4'-propyl-tolan
[807]PTP-35: 4-pentyl-4'-propyl-tolan
[808]PTP-45: 4-butyl-4'-pentyl-tolan
[809]PTP-201: 4-ethyl-4'-methoxy-tolan
[810]PTP-102: 4-methyl-4'-ethoxy-tolan
[811]CPTP-301: 4-(trans-4-propylcyclohexyl)-4'-methoxytolan
[812]CPTP-302: 4-(trans-4-propylcyclohexyl)-4'-ethoxytolan
[813]CPTP-303: 4-(trans-4-propylcyclohexyl)-4'-propoxytolan
[814]BCH-32: 4-ethyl-4'-(trans-4-propylcyclohexyl)biphenyl
[815]BCH-52: 4-ethyl-4'-(trans-4-pentylcyclohexyl)biphenyl
[816]BCH-59: 4-nonyl-4'-(trans-4-pentylcyclohexyl)biphenyl
[817]BCH-52F: 4-ethyl-4'-(trans-4-pentylcyclohexyl)-2'-fluorobiphenyl
[818]I52: 1-(trans-4-pentylcyclohexyl)-2-(4'-ethyl-2'-fluorobiphenyl-4-yl)-ethane
[819]CBC-33: 4,4'-bis-(trans-4-propylcyclohexyl)biphenyl
[820]CBC-35: 4-(trans-4-pentylcyclohexyl)-4'-(trans-4-propylcyclohexyl)-biphenyl
[822]CBC-55: 4,4'-bis-(trans-4-pentylcyclohexyl)biphenyl
[823]CBC-33F: 4,4-bis-(trans-4-propylcyclohexyl)-2-fluorobiphenyl
[824]CBC-35F: 4-(trans-4-pentylcyclohexyl)-4'-(trans-4-propylcyclohexyl)-2-fluorobipheny
[826]CBC-55F: 4,4'-bis-(trans-4-pentylcyclohexyl)-2-fluorobiphenyl
[827]D-301: p-methoxyphenyl trans-4-propylcyclohexane carboxylate
[828]D-401: p-methoxyphenyl trans-4-butylcyclohexane carboxylate
[829]D-501: p-methoxyphenyl trans-4-pentylcyclohexane carboxylate
[830]D-302: p-ethoxyphenyl trans-4-propylcyclohexane carboxylate
[831]D-402: p-ethoxyphenyl trans-4-butylcyclohexane carboxylate
[832]D-302FF: (2,3-difluoro-4-ethoxyphenyl) trans-4-propylcyclohexane carboxylate
[833]D-402FF: (2,3-difluoro-4-ethoxyphenyl) trans-4-butylcyclohexane carboxylate
[834]D-502FF: (2,3-difluoro-4-ethoxyphenyl) trans-4-pentylcyclohexane carboxylate
[835]PYP-3N,F: 2-(3-fluoro-4-cyanophenyl)-5-propylpyrimidine
[836]CBC-44: 4,4'-bis(trans-4-butylcyclohexyl)-biphenyl
[837]PYP-3F: 2-(p-fluorophenyl)-5-propylpyrimidine
[838]PYP-5F: 2-(p-fluorophenyl)-5-pentylpyrimidine
[839]PYP-35: 2-(p-pentylphenyl)-5-propylpyrimidine
[840]PYP-53: 2-(p-propylphenyl)-5-pentylpyrimidine
[841]PYP-50CF3 : 2-(p-trifluoromethoxyphenyl)-5-pentylpyrimidine
[842]PYP-70CF3 : 2-(p-trifluoromethoxyphenyl)-5-heptylpyrimidine
[843]I 32: 1-(trans-4-propylcyclohexyl)-2-(4'-ethyl-2'-fluorobiphenyl-4-yl)-ethane
[844]I 35: 1-(trans-4-propylcyclohexyl)-2-(4'-pentyl-2 '-fluorobiphenyl-4-yl)-ethane
[845]ME-2N: p-cyanophenyl p-ethylbenzoate
[846]ME-3N: p-cyanophenyl p-propylbenzoate
[847]ME-4NF: 3-fluoro-4-cyanophenyl p-butylbenzoate
[848]BCH-5: 4-cyano-4'-(trans-4-pentylcyclohexyl)biphenyl
[849]BCH-30CF3 : 4-trifluoromethoxy-4'(trans-4-propylcyclohexyl)-biphenyl
[850]BCH-50CF3 : 4-trifluoromethoxy-4'(trans-4-pentylcyclohexyl)-biphenyl
[851]CCP-30CF3 : 1-?trans-4-(trans-4-propylcyclohexyl)cyclohexyl)-4-trifluoromethoxybenzol ?sic!
[852]ECCP-30CF3 : 1-?trans-4-(trans-4-propylcyclohexyl)cyclohexyl!-2-p-trifluoromethoxypheny l)ethane
[853]ECCP-50CF3 : 1-?trans-4-(trans-4-pentylcyclohexyl)cyclohexyl!-2-(p-trifluoromethoxyphen yl)ethane
[854]ECCP-3F,F: 1-?trans-4-(trans-4-propylcyclohexyl)cyclohexyl!-2-(3,4-difluorophenyl)-et hane
[855]CPTP-302FF: 4-(trans-4-propylcyclohexyl)-2',3'-di-fluoro-4-ethoxytolan
[856]CPTP-502FF 4-(trans-4-pentylcyclohexyl)-2',3'-di-fluoro-4-ethoxytolan
[857]PTP-302FF: 4'-propyl-2,3-difluoro-4-ethoxytolan
[858]PTP-502FF: 4'-pentyl-2,3-difluoro-4-ethoxytolan
[859]CCPC-33: p-(trans-4-propylcyclohexyl)phenyl trans-4-(trans-4-propylcyclohexyl)-cyclohexanecarboxylate
[860]CCPC-34: p-(trans-4-butylcyclohexyl)phenyl trans-4-(trans-4-(propylcyclohexyl)-cyclohexanecarboxylate
[861]CCPC-35: p-(trans-4-pentylcyclohexyl)phenyl trans-4-(trans-4-propylcyclohexyl)-cyclohexanecarboxylate
[862]K12: 4-butyl-4'-cyanobiphenyl
[863]K18: 4-hexyl-4'-cyanobiphenyl
[864]T15: 4-p-cyanophenyl-4'-pentylbiphenyl
[865]DR-31: 2-methylpyridine-5-yl trans-4-propylcyclohexanecarboxylate
[866]DR-41: 2-methylpyridine-5-yl trans-4-butylcyclohexanecarboxylate
[867]DR-51: 2-methylpyridine-5-yl trans-4-pentylcyclohexanecarboxylate
[868]CP-33F: 2-fluoro-4-propylphenyl trans-4-(trans-4-propylcyclohexyl)cyclohexanecarboxylate
[869]CP-35F: 2-fluoro-4-pentylphenyl trans-4-(trans-4-propylcyclohexyl)cyclohexanecarboxylate
[870]CP-55F: 2-fluoro-4-pentylphenyl trans-4-(trans-4-pentylcyclohexyl)cyclohexanecarboxylate
[871]CP-302F: 2,3-difluoro-4-ethoxyphenyl trans-4-(trans-4-propylcyclohexyl)cyclohexanecarboxylate
[872]CP-402FF: 2,3-difluoro-4-ethoxyphenyl trans-4-(trans-4-butylcyclohexyl)cyclohexanecarboxylate
[873]HP-2N.F: 3-fluoro-4-cyanophenylp-(trans-4-ethylcyclohexyl)-benzoate
[874]EHP-3F.F: 3,4-difluorophenylp-(trans-4-propylcyclohexylethyl)-benzoate
[875]PCH-50CF2 : trans-1-p-(difluoromethoxyphenyl)-4-pentylcyclohexane
[876]PCH-7: trans-1-p-(cyanophenyl)-4-heptylcyclohexane
[877]PDX-2: 2-p-cyanophenyl-5-ethyl-1,3-dioxane
[878]OS-35: trans-4-pentylcyclohexyl trans-4-propylcyclohexanecarboxylate
[879]CCH-3: trans,trans-4-propylcyclohexylcyclohexane-4'-carbonitrile
[880]M3: 4-methoxy-4'-cyanobiphenyl
[881]M9: 4-propoxy-4'-cyanobiphenyl
[882]T-3FN: 4-(p-cyanophenyl)-2-fluoro-4'-propylbiphenyl
