TW420711B - Liquid-crystalline medium - Google Patents

Abstract

Liquid-crystalline medium based on a mixture of polar compounds having positive dielectric anisotropy, characterized in that it comprises (a) one or more compounds of the general formula I in which R1 and R2 are each an unsubstituted alkyl or alkeny1 radical having 1 to 15 carbon atoms in which, in addition, one or more CH2 groups may be replaced, in each case independently of one another, by -O-, in such a way that O atoms are not linked directly to one another, and A1 and A2 are each 1, 4-phenylene, 1, 4-cvclohexylene or a single bond; (b) one or more compounds selected from the group consisting of the general formulae, II, III, IV, V, VI, VII and VIII; (c) and, if desired, one or more compounds of the formula IX, in which R1 and R2 are as defined above, and the individual radicals are defined as follows: R0 is n-alky1, oxaalky1, fluoroalkyl or alkeny1, in each case having up to 7 carbon atoms, X0 is F, C1, halogenated alky1,alkeny1, or alkoxy having 1 to 6 carbon atoms, Y1 and Y2 are each, independently of one another, H or F, and r is 0 or 1.

Description

420711 Printed by a cooperative of the staff of the Central Bureau of Standards of the Ministry of Economic Affairs

A7 _____B7_ V. Description of the invention (i) The present invention relates to a liquid crystal medium, which is a mixture of polar compounds having positive two-electron anisotropy, and is characterized by including a) one or more compounds of formula I R1-Aj — «(〇 ^ ~ a2-r2 丨 where R1 and R2 are each an unsubstituted Ci-is alkyl or alkenyl group, and one or more of the (: 1 ^ 2 groups may be substituted with -0-, -s_, One < C >-, one CO-, one CO-0-, one 0-CO-, or one 0-co_o-, so that the oxygen atoms are not directly connected, and A1 and A2 are each 1,4-phenylene 1, 1, 4-cyclohexyl or single bond; b)-one or more selected from a group of compounds containing formula II, III, IV, V, VI, VII and VI II X0 II (Please read the precautions on the back first Refill this page] «m In ί—t (• Q clothing · order Y1

This paper size applies to Chinese National Standard (CNS) A4 (210X297 mm) 4 420711 A7 B7 V. Description of Invention (2) Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs

(Please read the notes on the back before filling in this page) ------------------ ^-Packing ------- Order ------ This paper Standards are applicable to China National Standards (CNS) A4 specifications (2IOX297 mm) -5-A7 420711 __B7_ V. Description of the invention (3) c) and if required, one or more compounds of formula IX,

In the formula, R1 and R2 are as defined above, and the definitions of each group are as follows: n-alkyl, aroalkyl, fluoroalkyl or alkenyl, each of which contains up to 7 carbon atoms, X. Is F, CP, halogenated alkyl, alkenyl or alkoxy group, which contains 1-carbon atoms. Y1 and Y2 are each Η or F, and r is 0 or 1.乂. Since the optical properties of liquid crystal can be changed by the applied voltage, it can be used as the dual electrons of the display. Liquid crystal-based electro-optic devices are well known to those skilled in the art and can be based on a variety of utilities. Examples of this equipment are dynamic scattering elements, DAP (decomposition of aligned images) elements, guest-host elements, TN (twisted nematic) elements, STN (super twisted nematic) elements, SBE (super birefringent effect) elements, and OMI ( Optical interference) element. The most common displays are based on Schadt-Helfrich utility and have a twisted nematic structure. Liquid crystal quality must have excellent chemical and thermal stability, and excellent stability to electromagnetic radiation from electric fields. In addition, the liquid crystal medium needs to have a relatively low viscosity and short expression time, low voltage and high contrast in the device. In addition, it is below the usual operating temperature (such as the maximum possible room temperature above and below this paper size is applicable to the Chinese National Standard (CNS) A4 specification (2! 0'〆297mm) 1, ------ rIο installed- (Please read the notes on the back before filling this page) Order printed by the Consumer Standards Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs A7 B7 420711 V. Description of Invention (4) (Please read the notes on the back before filling this page) Under the scope ) Need to have a proper mesophase (such as nematic or cholesterol mesophase in the above components). Since liquid crystals are generally used as a mixture of various ingredients, it is extremely important that the ingredients are easily mixed with other substances. Other characteristics such as conductivity, two-electron anisotropy, and optical anisotropy need to meet different needs depending on the form and scope of the component. For example, a structural element with torsional nematic needs to contain positive two-electron anisotropy and low conductivity. For example, a medium with high positive two-electron anisotropy, wide nematic phase, relatively low birefringence, relatively high resistance, good UV and temperature stability, and low vapor pressure. For media containing embedded non-linear elements to switch the individual phases < mlc device ) Matrix LCD is extremely important. This type of matrix liquid crystal display is known. Non-linear elements that can be used to switch the individual phases are active redundancy (ie, semiconductors). It can be called A-activity matrix, and the difference between the two is: 1. MOS (metal oxide semiconductor) or other diodes on silicon wafers are used as substrates. 2. The thin layer of semiconductor on the glass substrate is used as a substrate. Printed by the Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs. The use of monocrystalline silicon as a substrate will limit the size of the display, so even the adjustment of various display units will cause problems at the connection. For the more promising and better type 2-the TN effect is generally used as an electro-optic effect. The difference between the two technologies is that TFFs contain semiconductor compounds, such as CdSe, or TFTs based on polycrystalline or non-solid silicon. The world has been investigating the latter's technology. The TF F element is applied to the inside of the glass plate of this display, while the other glass plate contains a transparent counter electrode inside. Relative to the size of the phase electrode, this paper size applies to China's national standard (0) _ 8 4 specifications (210 father 297 mm) Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 420711 A7 __B7 _ V. Description of the invention (5 ) TF T is very small and has no adverse effects on the image. This technology can also be extended to color compatible image displays, in which the red, green and blue filters are non-column so that each filter is opposite the switchable phase. TF T displays generally operate with a TN element containing an inter-electrode emitter and are illuminated from the rear. The term ML C display includes any component display with embedded non-linear elements, that is, in addition to active components, it also contains inactive elements such as resistors or diodes (MIM two metals one insulator one metal). This type of MLC display is particularly suitable for high-information displays for TV use (such as handheld TV devices) or computers (desktop computers) and automotive or aircraft engineering. In addition to the problems caused by the angle-based comparison and response time, ¥ 1 ^ (: The problem of the display is due to the poor resistance of the liquid crystal mixture [1'00 九 3-HI, S., SEKIGUCHI, K., TANABE, H. , YAMAMOTO, Et SORIMACHI, l., TAJ IMA, E., WATANABE, H., SHIMIZU, H., Proc. Eurodisplay 84, Sept. 1984: A 210-288 Matrix LCD Controlled by Double Stage Diode Rings, p.141 ff, Paris; STROMER, M., proc. Eurodisplay 84, Sept. 1984: Design of Thin Film Transistors for Matrix Addressing of Television Liquid Crystal Displays, p. 145 ff, Paris]. Contrast of ML C display with respect to reduction of resistance It will decrease, and it will cause the problem of elimination after image. Because the resistance of the liquid crystal mixture will decrease with the display life of the MLC due to the interaction with the internal surface of the display, it is extremely important to have a high (initial) resistance to obtain an acceptable transmission life. Especially with low-volt mixers, it is not possible to reach the size of this paper and apply Chinese National Standard (CNS) A4 specifications (210X297 mm) * .....— 1 ^ 1 «HI (Please read the notes on the back before filling (This page) Order 420711 A7 _B7 V. Description of the invention (6) Extremely high resistance. Therefore, as the temperature increases and after heating and / or exposure to UV radiation, the resistance rises as low as possible. In addition, it is known that the special disadvantage of this mixture is low temperature Properties. It needs no crystalline phase and / or dish-like liquid crystal phase to occur even at low temperatures, and the lower the viscosity depending on the temperature, the better. Previous MLC displays did not meet current needs. MLC displays with relatively high resistance under low temperature and a wide operating temperature range, short response time, and low voltage (which does not have the above disadvantages or to a lesser extent) have great demand. For TN devices (schadt-He 1 fri ch), the medium is necessary to facilitate the following advantages: _ Wider nematic phase range (especially at low temperatures).-Switchability at extremely low temperatures (outdoor use, automotive, avionics) — Increased stability (longer life) when exposed to UV radiation. The medium obtained by the prior art cannot achieve this advantage while maintaining other variables. The medium in a super twister (STN) requires It has a large multi-network and / or a lower threshold voltage and / or a wider nematic range (especially at low temperatures). Finally, the expansion of this variable range (definition, dish-like nematic or melting point, viscosity, two-electron quantity, elasticity) is extremely needed. The object of the present invention is to provide a medium for MLC, TN or STN displays, which does not have the above disadvantages or is reduced to a degree, and at the same time has very high resistance and low threshold voltage. It is known that this purpose can be achieved when using this novel medium in a display. Zhang scale is applicable to China National Standard (CNS) A4 specification (210X297 mm). '' -9 " (Please read the notes on the back before filling this page) -L. Consumption Cooperative Printed by the Central Bureau of Standards of the Ministry of Economic Affairs of the United States of America, 裂 420711 A7 ____ B7 V. Description of the Invention (7) The present invention relates to a liquid crystal medium, which is based on a mixture of positive polar two-electron anisotropic polar compounds It is characterized by comprising one or more compounds of formula II to VI II and optionally containing one or more compounds of formula IX. The compounds of formula I have a very wide range of uses. Depending on the substituents used, this compound can be used as the matrix of the liquid crystal medium; however, the compound of formula I can also be added to the liquid crystal matrix derived from other compounds to change the two-electron and / or this type of two-electron optical anisotropy and / or improvement The threshold voltage is optimal and / or its consistency. Pure compounds of formula I are colorless and form a liquid crystal phase at a temperature range suitable for electro-optical use. It is chemically, thermally and optically stable. Compounds of formula I have been published in DE 2 4 2 9 0 9 3. In a novel medium containing a compound of Formula I I to VI I I, X. Should be F, Cj ?, ocf3, ochf2, cf3, chfcf3, cf2chf2, c2h4chf2, cf2cf2cf3, chf2, ocf2 cf3, och2chf2, 〇cf2chf2, O (CH2) 3CF3, OCH2CF5, ch2f2f2ff, oc2f2f2f3 och = cf2, 〇CF = CF2, 0CF = CFCF3, OCF = CF-c2f5, cf = chf, cf = cf2, cf = cf2, cf2, cf3, especially f, ochfcf3, ocf3, ochf2, oc2f5, oc3f7, och = cf 』c F 20 c F 3 ° This paper size applies Chinese National Standard (CNS) A4 (210X297 mm) 1 ^ 1 ^ 1-1 n ^ — I n ^ /. (Please read the note on the back first Please fill in this page again) Order-10-Printed by the Employees' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 420711 A7 __B7____ V. Description of the invention (8) When R1, R 2 and / or R 3 are alkyl and / or alkoxy It can be straight chain or branched. Preferably it is straight-chain and contains 2, 3, 4, 5, 6, or 7 carbon atoms, such as ethyl, western, butyl, pentyl, hexyl, heptyl, ethoxy, propoxy, butoxy , Pentyloxy, hexyloxy, or heptyloxy, methyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, methoxy, Octyloxy, nonyloxy, decyloxy, --oxy, dodecyloxy, tridecyloxy or tetradecyloxy. The fluorenyl group is preferably a linear 2-propyl (dimethoxymethyl), 2- (diethoxymethyl) or 3--butyl (di-2-methoxyethyl), 2-, 3- Or 4-0, etc. amyl, 2-, 3 ~, 4- or 5-hexyl, 2 ~, 3-, 4-, 5 —, or 6-heptyl, 2 —, 3_, 4 —, 5 —, 6 — or 7-Moctyl, 2-, 3 —, 4 —, 5 to, 6-> 7-or 8 — to hire nonyl, or 2-, 3 —, 4 to 1, 5 to ~, 6 —, 7 —, 8-, or 9 噂 decyl. • When R1, and / or R. Is an alkyl group in which one CH2 group may be substituted with -CH = CH ~, which may be straight chain or branched. It should be C ^ -io. Therefore, it can be the ethyl radical, C-1, or C2, C1, C1, C2, or C3, C1, C1, C2, C2, C3, C4, C4, C4, C2 , Ji Yi 1 —, 1 2 ~, 1 3 —, — 4-or ~ 5 ~ Chan Ji 'Geng Yi 1 1, — 2 —, — 3 —) — 4 — — or — 6 — Chan Ji, Xin — 1 —, one 2 —, one 3 —, — 4 —, — 5 —, — 6 —, or —7 — alkenyl, nonyl 1 one, — 2 ~, ~ 3 —, — 4 —, one, one 6 ~, a 7- or 8-alkenyl or decane 1 ~, _2-, -3-, -4-, -5-, -6-, this paper is suitable for the national scale (CNS) 8-4 Miscellaneous (21GX297 mm) '~-r-. Equipment — (Please read the notes on the back before filling in this ear} --Γ. -Order 11 420711 Α7 Α7 Β7 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs Description of the Invention (9) —7 —, —8 — or —9 —Sulfuryl group. The branched wing group of the compound of formula I is sometimes important due to the better solubility in the conventional liquid crystal matrix, especially when it is Opaque nature when optically active. This type of branching group generally contains no more than 1 branching bond. Isopropyl, 2-butyl (= 1 monomethylpropyl), isobutyl (= 2-methylpropyl), 2-methylbutyl, isopentyl (di 3-methylbutyl) ), 2-methylpentyl, 3-methylpentyl, 2-ethylhexyl, 2-propylpentyl, isopropoxy, 2-methylpropoxy, 2-methylbutoxy , 3-methylbutoxy, 2-methylpentyloxy, 2-methylpentyloxy, 2-ethylethoxy'1-methylhexyloxy, 1-methylheptyloxy. The first preferred part of the invention relates to a medium comprising a compound of formulae I to VI II, and if necessary a compound of formula IX, in particular a compound of formulae I to IX in a weight ratio of at least 80%; and / or -The weight ratio of the compound of formula I in the mixture is 3-2 5%; and / or the weight ratio of the compound of formula II to IX in the mixture is 5 5-9 7%, especially the compound of formula II (where γι, γ2 and χ 〇 is ρ) The weight ratio is 5-15%, and the weight ratio of the compound of formula IV (where Υ1, Υ2, and X. is F) is 15-4 0%. This medium is especially suitable for the high characteristic line Gradient active matrix display. In another preferred aspect, the medium contains one or more compounds of the formula XII and / or XII: The paper size applies to the Chinese National Standard {CNS) A4 (210X297 mm) —, --------- ί --〇 装-(Please read the notes on the back before filling out this page) 'Order--12-420711 A7 B7 V. Description of the invention (1〇

XII

XIII where R1 and R2 are as defined in the first patent application scope and-and each is or (please read the precautions on the back before filling this page), where L is Η or F. This medium has extremely high resistance. a) Medium containing at least one compound of formula I a 1 N ·

la In the printing scheme of the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs, m and η are 1, 2, or 3 each. b) Contains one or more VI la and VI I I media! Of compounds

F

This paper size is suitable for + _ 罔 ginseng sifting, ^; > Eight-shirt You Xiu (; 2 丨 0 乂 297 mm)

Vila

Villa 13 420711 Α7 _______B7 V. Description of the Invention (u) ~;-where R ° is n-alkyl, fluorenyl, fluoroalkyl or alkenyl, each of which has up to 9 carbon atoms. c) a medium containing one or more compounds of formula XI la, χι ib and / or χ: I I a:

The present invention is more about using a liquid crystal medium to improve the characteristic line gradient of a matrix liquid crystal display. The present invention also relates to an electro-optic liquid crystal display with embedded non-linear elements to switch the individual phases, which includes a liquid crystal medium such as the first item in the scope of patent application. Printed by the Ministry of Economic Affairs Standard Consumer Product Cooperative (please read the notes on the back before filling this page) This novel liquid crystal mixture can make the variable range quite wide. Its clear point, low temperature viscosity, thermal and UV stability, characteristic line gradient and two-electron anisotropy are better than known substances. The requirements for high-resolution points, low-temperature nematics, moderate ratios, and high characteristic line gradients have not reached a satisfactory level. Although z L I-3 1 1 9 has a fairly clear point and a very good viscosity, its Δ ε is only + 3 and has a low characteristic line gradient. This paper size applies to the Chinese National Standard (CNS) A4 (210X297 mm). The consumption of employees of the China Standards Bureau of the Ministry of Economic Affairs & A7 __B7_ V. Description of the invention (12) Other mixture systems have comparable viscosity and △ s , But the clear point is only at 60 ° C. This novel liquid crystal mixture allows sharp points to be higher than 70. It should be higher than 7 5 ° and higher than 100. (: It is suitable, while the two-electron anisotropy is _6, preferably 18, and high resistance, while maintaining the nematic phase as low as 0 2 0 ° C, and as low as _3 0 ° C, It is more suitable to be as low as 0 ° C, and excellent S TN and MLC displays can be obtained. In particular, this mixture is characterized by a low operating voltage. The XTN threshold is below 2.0V, preferably below 1.5V, <1.3V is more suitable. On the contrary, the novel medium containing compounds of formula XII and XIII has extremely high resistance 値 and high TN 阆 値. This mixture is especially important for indoor use. This novel MLC display is especially suitable for Gooch and Tarry's first penetration and lowest jerk operation is appropriate [CH Gooch and HA Tarry, Electron, Lett. 10, 2-4, 1974; C. H 'Gooch and Η. A. Tarry, Appl. Phys., V. ] · 8, 1575-1584, 1975], in which the lower two-electron anisotropy of the second lowest 足以 is sufficient to connect for better electro-optical characteristics, such as high characteristic line gradient and low angle correlation at phase threshold voltage of similar displays Contrast (German patent 3 0 2 2 8 1 8). Therefore, the use of this novel mixture is lower than the mixture of cyanide compounds High resistance can be achieved. By using appropriate individual composition and weight ratio, those skilled in the art can obtain diodes suitable for MLC displayers with known board thickness through simple methods. The consistency is preferably <6 OmPa. S, and -15-this paper size applies the Chinese National Standard (CNS) A4 specification (210X 297 mm) C, please read the precautions on the back before filling this page) Order _ 420711 A7 B7 Central Bureau of Standards, Ministry of Economic Affairs 1. Consumers ^ &gt; Zhatu pi V. Description of the invention (13) &lt; 5 OmP a. S is more suitable. The range of nematic phase is at least 90. It is better to use at least 10 more. The preferred range is a 20. To +8 0 ° 〇 Capacitance maintenance ratio (HR> measurement [S. Matsum 〇t 〇et al., Liquid Crystals 5_, 1 320 (1 989); K. Niwa et al &gt; Proc. SID Conference, San Francisco, June 1984, p. 304, (1984); G. feber et al., Liquid Crystals 5_, 1 38 1 (1 989)] shows that novel mixtures containing compounds of formula I -CN r- (〇 &gt; -C.〇- &lt; O ^ CN esters, rather than similar mixtures of compounds of Formula II to VI II, have significantly less reduction in HR under warming. UV of novel compounds The stability is also better, that is, the reduction of HR when exposed to UV radiation is also relatively small. The novel medium is preferably a compound containing a variety of formula I (preferably 2 or more), that is, this compound The ratio is from 2 to 30%, preferably from 3 to 25%, and more preferably from 6 to 20%. The compounds of formulae I to XIII and their sub-compounds used in the novel media are known or can be similar by known compounds The preferred embodiment is as follows: The compound of formula IV should be {please read the precautions on the back before filling this page). Quasi (CNS) Α4 size (210X297 mm) 16 420711 A7 B7 V. invention is described in (14

c F F

X0 This medium may contain one or more of the following compounds

F -------- i-(Please read the precautions on the back before filling out this page) Order Printed by the Consumer Cooperatives of the Central Directorate of the Ministry of Economic Affairs

And / or this paper size applies Chinese national standard (CNS &gt; A4 size (210 X 297 mm) 17 420711 A7 B7 V. Description of the invention (15) The weight ratio of the compounds of formula II to VI II in this mixture is 9 5 -6 0%, especially 90 to 70% by weight.

X. Should

-®-F,-{^ F, F Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economy-&lt; 5 &gt; 0CF3,-&lt; 5 ^ ocf3 *-&lt; 2 &gt; cf3--&lt; 0 ^ cf3, h ^ cf3,-&lt; 0 &gt; 〇〇hf2,-&lt; ^ 〇chf2, F- &lt; ^-ochf2. -ζ〇) -〇ι ~ (sy〇or-^ £ ζα 'F-containing formula II Medium of compounds of III, IV, V or VI ο-R ° is a straight-chain C2-7 alkyl or alkenyl group.-A medium substantially containing compounds of formula I, II, IV, VI, VI I and VIII.-Containing Medium for another compound (preferably a compound of formula XIV):

XIV ----------- ί I-(Please read the notes on the back before filling out this page) The size of the paper is applicable to the National Standard for Bacteria (CMS) A4 (210X297 mm) — x — 18 420711 A7 B7 V. Description of the invention (16) In the formula, R 0 and X ° are as defined above, and 1 CN, chlorine or fluorine. 1, 4_ benzene ring fluorine atom is suitable. It is known to mix formula I with a relatively low proportion, especially one or more formula II to VI 闳 voltage and high gradient, and at the same time, a wide nematic transition temperature can be obtained, thus extending its life is colorless, stable and easy to interact with each other and its alkane The term hydrazone refers to straight and branched 5 carbon atoms of methyl, ethyl, propyl, butyl and pentyl. The term "alkenyl" refers to straight-chain and branched, 4 benzene ring can be substituted with a single substitution or multiple substitution with compounds and conventional liquid crystal substances (II compounds) can significantly reduce the wide nematic phase and low dish LCD one. Compounds of the formulae I to X I I I It mixes liquid crystal substances. Ci-7 alkyl, especially straight chain such as, hexyl and heptyl. With 2 to C 2-7 alkenyl groups, especially straight chain groups. Such as C2— C7 — 1 E — R, C4 — C7 — 3 E — R, Cs — C? — 4 — Dilute, Ce — C7 — 5 — R and C — 6 — R ', especially Cg— C ·? — 1 E —Too basic, C4 to C? — 3 E — .1- * 1-1 I- 1 II -I 1 I {Please read the note # on the back before filling this page}- It is ordered to print the storage base and C5 — Ct ~ 4 — burn base of the Central Standard Bureau of the Ministry of Economic Affairs. Examples of preferred alkyl groups are ethylene 1E-propenyl, 1E-butenyl, 1E-hexenyl, 1 alkenyl, 3-butenyl, 3E-pentenyl, 3E-hexenyl-heptenyl , 4-pentenyl, 4Z-hexenyl, 4E-hex 42-heptenyl, 5-hexenyl, 6-heptenyl and the like. It is better to have carbon atoms. The term "afluoroalkyl" is preferably a straight-chain fluoromethyl group containing fluorine atoms at both ends, 2-fluoroethyl, 3-fluoropropyl, 4-fluorobutyl, pentyl, 6-fluorohexyl and 7-fluoroheptyl. However, it does not exclude alkenyl, E-heptyl, 3 E alkenyl, up to 5, that is, 5-fluorine other paper sizes apply _ National Standard (CNS) A4 specifications (210X297 mm) 19 420711 Central Ministry of Economic Affairs Standard Bureau employee consumer cooperatives print A 7 __; _B7_ V. Description of invention (17) Fluorine atom. '&quot; Aromatic alkyl, the term should be CnH2 „+: L— Ο— (CH2) ™ linear group, where η and m are each 1 to 6, η is 1 and m is 1 to 6 ° In order to achieve better R ◦ and X ° 値, expression time, threshold voltage, penetration characteristic line gradient, etc., can be changed as needed. For example, 1 E -alkenyl, 3 E -alkenyl, 2 E -enyloxy Relative to alkyl and alkoxy groups, it can cause shorter expression time, improved nematic tendency, and higher elastic constants K33 (bending) and Ku (elongation) than 値. 4 monoalkenyl, 3-alkenyl, etc. Relative to alkyl and alkoxy groups, it can cause lower threshold voltage and lower K 33 / K ^ 値 0 The preferred mixing ratio of compounds of formula I and II to _VIII can be determined according to the required properties, and formula I can be selected, II, II I., IV, V and / or VI ingredients and other existing ingredients. The appropriate mixing ratio within the above range can be determined according to the actual situation. The total amount of compounds of formulae I to VI II in the novel mixture is not Important. Therefore it may contain one or more other ingredients to improve various properties. However, generally, it can be larger when the total concentration of the compounds of formulae I to VIII is higher. Expression time and gradient. In a preferred embodiment, the novel medium contains compounds of formulae II to VIII, where X. is 0CF3, 0CHF2, F, 0CH = CF2, 0〇 卩 = 〇? 2 or 00 卩 2-0卩 211. The synergistic effect of the compound of formula 1 will cause exceptional properties. Novel ml by polarizer, electrode substrate and electrode with surface treatment. I -------- I 'I --- (Please read first Note on the back, please fill in this page again)-The size of the paper is applicable to China National Standard (CNS) A4 (210 × 297 mm) 20 A7 420711 B7__ 5. Description of the invention (18) (Please read the note f on the back before (Fill in this page) C display structure can refer to the structure of the conventional display. The term “conventional structure” is very broad and includes all the derivatives and changes of ML C display, especially the matrix containing polysilicon TF F or Μ I Μ Display elements. However, a significant difference between this novel display and conventional displays is that the twisted nematicizer is within the choice of the liquid crystal variables of its liquid crystal layer. The liquid crystal mixture used in accordance with the present invention can be made according to known methods. Generally, it is used Lower than the target ingredients to dissolve the ingredients The main composition is made under heating. The solution containing the ingredients can also be mixed in an organic solvent such as acetone, chloroform or methanol, and the solvent can be removed by e.g. distillation. Additives that are well known and described in the literature. For example, 0-15% of multi-color dyes or mask paints. Table C is the crystalline phase, S is the dish-like liquid crystal phase, Sc is the dish-like liquid crystal C phase, and N It is a nematic phase and I is the same phase. The Ministry of Economic Affairs_Central Bureau of Standards and Consumers Cooperatives printed the electric house with V10 penetration of 10% (visual angle perpendicular to the plane of the board). 1:. „Is the time when the operating voltage is on at 2.5 times V10 and tf is the off time. An is the optical anisotropy and η. Is the refractive index. △ ε is the two-electron anisotropy (Aece 丨 丨 e 丄, where ε &quot; is the two-electron constant parallel to the longitudinal axis of the molecule and its vertical two-electron constant). Unless otherwise specified, the electro-optical data is based on the TN device at the first lowest 亦 (that is, △ η is 0 · 5) and 2 0 · (: Lower measurement. If there is no special explanation, the optical data is measured below 20 ° C. In this description and the following examples, the structure of the liquid crystal compound is indicated by the initials, which can be according to the following list A and B into a chemical formula. All C nH 2 ... and linear alkane containing relative η and m carbon atoms {This paper size is applicable to China National Standard (CNS) A4 specification (210X297 mm) -21-420711 A7 ΒΊ_ V. Explanation of the invention (19). The code in Table B is easy to understand. Table A only shows the initials of the main structure. In each example, the initials of the main structure are connected with a dashed line and a substituent.

R

Code 2 L and L f 2 R

If ----- L ---- (Please read the notes on the back before filling out this page) The paper size printed by the Employees' Cooperatives of the Shiyang Standard Bureau of the Ministry of Economic Affairs applies to the Chinese National Standard (CNS) A4 specification (210X297 (Mm) -22-4 &lt; 07il A7 B7 V. Description of the invention (20 Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs R 1 »R 3», L 2 code Ri r, Rz U L2 nm CnHgp + i HH nOm OC | T | Hjgm + ^ HH nO.m OCnHan + i CmHgm + l HH η ^ η ^ 2η + | CN HH nN.F CnHan + l CN HF nF CnH ^ n + i FHH nOF OCnH ^ n + t FHH nCI CJ HH nF.F CnH ^ + i FHF nF.FF FFF nCF 3 ^ η ^ 2η + 1 cf3 HH nOCF3 CnHgn.i ocf3 HH nOCFg Cr &gt; H2n + 1 ochf2 HH nS CnH ^ n + i NCS HH rVsN C, H2r + 1-CH = CH-C, H24- CN HH rEsN CrHgr + i -O-CgHjj- CN HH nAm CriH2n + 1 COOC ^ H ^ HH nOCCFs.FF CnHjn + i OCH2CF2H FF Table A and B are the better mixed ingredients (Table Αί

Rz

-------- &quot;! cr—— (Please read the notes on the back before filling in this page) Order

BCH

CBC This paper size applies to Chinese National Standard (CNS) A4 (210X297 mm) 23 420711 A7 B7

V. Description of the invention) R2

CCH L '

RK Η &gt;—( Η &gt; —COQ- ^ oV-R2 ~~ CSC

V

CP CPTP

o Vr1 (Please read the precautions on the back before filling this page) R,

CEPTP -CSC— (〇 &gt; ~ ^ L2, 1T Printed by the Employees' Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs

-Cj ^ — (〇 Vr2 L *

ECCP L1

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Printed by the Consumer Standards Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs Form C15: cn ^ 〇— (〇y- ^ 〇)-M3n

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This paper size applies to Chinese National Standard (CNS) A4 (210X297 mm) -27-Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 420711 A7 A7 The invention is used but not limited to this. Above and below the percentages are on a weight basis. All temperatures are expressed in degrees Celsius, m · P · is the melting point, and c. P · is the clear point. In addition, a crystalline phase, n = nematic phase, s = disc liquid crystal phase and I = isophase. The number between this code is the conversion temperature. Δη is the optical anisotropy (589 nm, 20 ° C), and the viscosity (mm2 / s e c) is measured at 20 ° C. Example 1 Preparation of a liquid crystal medium comprising

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This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) -28-420711 A7 B7 V. Description of invention (26) CBC-53F 4.0% CBC-55F 4.0% 2 3 I ργ ρ 3 3 i ργ ρ 5 ο 6 I ργ ρ%%% ο ο ο 5 6 5 The quality of the equipment is described below. 3 8 + Ν ο 4 1 &lt; 5 CC ο ο 3 2 | / V / V Degree thick and sticky

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Claims (1)

A8 B8 C8 D8 VI.-Please refer to Annex 1 of the Patent Fan Garden α Fu Yi No. 85100779 Patent Application Chinese Patent Application Amendment (please read the precautions on the back before filling out this page) Amended in October 1989 1 · One Liquid crystal medium 'is based on a mixture of polar compounds containing positive two-electron anisotropy, which contains a) one or more compounds of formula I R1-A1-^ (~ 〇 \ ~~ (〇 \ -A2-R2 I V_7 N_ /, Where R1 and R2 are each an unsubstituted alkyl or alkenyl group, and one or more of the CH 2 groups may be substituted with 10-, respectively, so that the oxygen atoms are not directly connected, and employees of the 4th Bureau of Intellectual Property of the Ministry of Economic Affairs A1 and A2 printed by consumer cooperatives are each 1,4-phenylene, 1,4-cyclohexyl or single bond; 'b)-one or more selected from a group containing formula II, III, IV' V ' Compounds VI, VII and VIII This paper size is applicable to China National Standard (CNS) A4 (210X297 mm) -1-420711 S D8 6. Scope of patent application This paper size applies to China National Standard (CNS) A4 specification (210X297 mm) -2-Printed by the Intellectual Property Bureau Staff Consumer Cooperative of the Ministry of Economic Affairs 4207Π B8 C8 ____ D8 VI. Application scope c.) And if necessary, one or more A compound of formula IX, Y1 In the formula, R 1 and R 2 are as defined above, and the definitions of each base are as follows: R. Are n-alkyl'fluorenyl, fluoroalkyl or alkenyl, each of which contains up to 7 carbon atoms, X. Is F, CV 'halogenated alkyl, alkenyl or alkoxy group, which contains 1 to 6 carbon atoms. · Υ1 and Υ2 are each Η or F, and r is 0 or 1. 2. The medium according to item 1 of the scope of patent application, wherein the medium substantially comprises a compound of formula I to VI I I, and if necessary, a compound of formula IX. 3. The medium according to item 1 or 2 of the scope of patent application, wherein the proportion of the compounds of the formulae I to I X together accounts for at least 80% by weight of the mixture as a whole. 4. The medium according to item 1 or 2 of the scope of patent application, wherein the proportion of the compound of formula I accounts for 3 to 2 5% by weight of the mixture as a whole. 5. If the medium of item 1 or 2 of the patent application, wherein the ratio of the compound of formula 11: to IX accounts for 5 5-97% by weight of the mixture as a whole. 6. If the medium of item 1 or 2 of the patent application, The size of the media package paper applies to the Chinese National Standard (CNS) A4 specification (210X 297 mm)! I Pack III order n ^ m, line ~ /,, 〆y * / (Please read the precautions on the back first% fill in this (Page) 420711 r8 C8 _ D8 _ 6. The scope of patent application includes one or more compounds of formula XII and / or XIII: Where R1 and R2 are as defined above, and Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 7. If the medium of the scope of patent application 1 or 2 is applied, the medium contains at least one compound of formula I a CnHzmi — (^) — Οπ, Η ^, la where m and η Each is 1,2 or 3 »8. The medium according to item 1 or 2 of the patent application scope, wherein the medium contains one or more compounds of formula VI I a and VI II a The size of this paper applies to Chinese National Standard (CNS) A4 specification (210X297 mm) —A — A8 B8 C8 D8 4207U. The scope of patent application is in formula R. They are n-fluorenyl radicals, "shuyuan radicals," "fluorine radicals," or "can radicals," each of which contains up to 9 carbon atoms. 9. The medium of claim 1 or 2, wherein the medium contains one or more compounds of formula XI I a ′ XI lb and / or X I I I a: O V-R2 Η) —B Xlla Xllb Xllla 1 0. If the liquid crystal medium of the first patent application scope is used, it can be used to improve the characteristic line gradient of the matrix liquid crystal display. 11 The liquid crystal medium according to item 1 of the scope of patent application, which is used in an electro-optical liquid crystal display, which includes integrated non-linear elements to switch each axis. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs | I use a moderate ruler I-paper | quasi-I bidder 国 Guo.Guo A8 B8 C8 D8 VI.-Please refer to the appendix 1 of the patent fan park. #Fujie Patent No. 85100779 Amendment of Chinese patent application scope (please read the precautions on the back before filling out this page) Amended in October of the Republic of China 1 · A liquid crystal medium 'based on a mixture of polar compounds containing positive two-electron anisotropy, which contains a) — One or more compounds of formula I R1-A1-^ (~ 〇 \ ~~ (〇 \ -A2-R2 I V_7 N_ /., Where R1 and R2 are each unsubstituted alkyl or alkenyl, one or more of which Each CH 2 group can be replaced with 10-, respectively, so that the oxygen atoms are not directly connected, and the A1 and A 2 printed by the Consumer Cooperative of the 4th Bureau of Wisdom and Finance of the Ministry of Economic Affairs are each 1,4-phenylene, 1, and 4 ring. Hexyl or a single bond; 'b)-one or more compounds selected from the group consisting of formulae II, III, IV' V 'VI, VII and VIII This paper size applies to Chinese National Standard (CNS) A4 (210X297 mm) -1-