摘要:
Described is a guest host liquid crystal composition comprising as a host liquid crystal a liquid crystal composition containing some of the compounds represented by the formulas (I) to (V) which will be described below; and at least four dichromatic dye compounds. ##STR1##
摘要:
The present invention provides a guest-host liquid-crystal composition comprising a host liquid-crystal composition containing one or more dichroic dyes, characterized in that the host liquid-crystal composition comprises as the main component a polycyclic compound having three or more rings and having no cyano group in the direction of the molecular axis, the proportion of the polycyclic compound component having three or more rings in the host liquid-crystal composition being 75% by mole or higher, and that the guest-host liquid-crystal composition has an order parameter (S value) of 0.76 or higher. The invention further provides a liquid-crystal display element employing the composition. This guest-host liquid-crystal composition shows excellent dichroism or a high order parameter.
摘要:
A dichroic azo dye characterized by having a trifluoromethyl-substituted biphenyl framework and being represented by the following general formula, and a guest-host liquid-crystal composition and a liquid-crystal display element each containing the same and having a high order parameter throughout the whole light absorption wavelength range, are provided: ##STR1## (wherein A and B each independently represents an optionally substituted alkyl group, phenyl group or cyclohexyl group; X and X.sup.1 each independently represents a methylene group or a carbonyl group; and R.sub.1 to R.sub.12 each independently represents a hydrogen atom, a halogen atom, a methyl group or a methoxy group, or R.sub.2 and R.sub.3, R.sub.5 and R.sub.6, R.sub.8 and R.sub.9, and R.sub.11 and R.sub.12 may be bonded to each other to form an aliphatic, aromatic or nitrogenous aromatic ring which is a five-membered or larger-membered ring).
摘要:
A guest host mode liquid crystal composition comprising dichroic dyes and host liquid crystal, wherein said dichroic dyes are at least one member selected from each of the following groups (A), (B) and (C):Group (A) consisting of azo dichroic dyes of the following formula (I): ##STR1## wherein each of R.sup.1 and R.sup.2 which are independent of each other, is a hydrogen atom, a C.sub.1-10 alkyl or alkoxy group, a C.sub.2-12 alkoxyalkyl group, a halogen atom, or a cyclohexyl, phenyl, benzyl or cyclohexylmethyl group which may have such an alkyl, alkoxy or alkoxyalkyl group or a halogen atom, as a substituent;Group (B) consisting of azo dichroic dyes of the following formula (II): ##STR2## wherein n is 0 or 1, R.sup.3 is R.sup.1 and each of R.sup.4 and R.sup.5 which are independent of each other, is a hydrogen atom, a C.sub.1-10 alkyl, alkoxy or halogenated alkyl group, a C.sub.2-12 alkoxyalkyl group, a halogen atom, or a benzyl or cyclohexylmethyl group which may be substituted as R.sup.1 ; andGroup (C) consisting of anthraquinone dichroic dyes of the following formula (III): ##STR3## wherein ##STR4## each of R.sup.6 and R.sup.7 which are independent of each other, is a hydrogen atom, a halogen atom, a C.sub.1-10 alkyl or alkoxy group, a C.sub.2-12 alkoxyalkyl group, or a cyclohexyl or phenyl group which may be substituted as R.sup.1.
摘要:
When charging a battery of a low-voltage system, a battery charging apparatus of the present invention switches on a field-effect transistor and distributes the output of a generator via a diode to the battery. Further, when charging a battery of a high-voltage system, the battery charging apparatus switches off the field-effect transistor and distributes the output of the generator via the diode to the battery. At this time, the field-effect transistor is switched, and chops the output of the generator. Then, by selecting the duty of a clock signal for controlling this switching, the output powers of the generator when charging the high-voltage system and when charging the low-voltage system are made substantially equal, reducing fluctuation in the input torque of the generator.
摘要:
There is herein, disclosed a dye laser including a container for a dye solution and a pumping energy source coupled thereto, said dye solution containing a perimidone dye formula (I): ##STR1## wherein R.sup.1 is a hydrogen atom, an alkyl group, a trifluoromethyl group, an alkoxycarbonyl group, an alkoxycarbonylalkyl group, an aralkyl group or a phenyl group; R.sup.2 is an optionally substituted alkoxycarbonyl group, a cyclohexyloxycarbonyl group, tetrahydrofurfuryloxycarbonyl group, an aryloxycarbonyl group, a benzyloxycarbonyl group, an acyl group, a cyano group or an optionally substituted carbamoyl group; R.sup.3 and R.sup.4 which may be the same or different are each a hydrogen atom, an alkyl group, an alkoxyalkyl group, an aralkyl group or an aryl group.
摘要翻译:本文中公开了一种染料激光器,其包括用于染料溶液的容器和与其耦合的泵送能量源,所述染料溶液含有式(I)的泼尼昔酮染料:其中R1是氢原子,烷基, 三氟甲基,烷氧基羰基,烷氧基羰基烷基,芳烷基或苯基; R2是任选取代的烷氧基羰基,环己氧基羰基,四氢呋喃氧基羰基,芳氧基羰基,苄氧基羰基,酰基,氰基或任选取代的氨基甲酰基; R 3和R 4可以相同或不同,分别为氢原子,烷基,烷氧基烷基,芳烷基或芳基。
摘要:
A dye laser comprising a container retaining a dye solution for laser and an energy source for pumping connected to the container, the dye solution containing a pyrazoloazaxanthenoisoquinolinone dye.
摘要:
An anthraquinone dye and a liquid crystal composition containing the same are disclosed. The anthraquinone dye shows a cyan color and has excellent order parameter, solubility and stability. The liquid crystal composition is particularly used in an electro-optic cell, which is interposed between two facing electrode plates and permits the realization of good color displays utilizing the guest-host effect of a liquid crystal.
摘要:
This invention relates to a guest-host type liquid crystal composition and a color liquid crystal display device in which said composition has been sealed. This invention provides a liquid crystal composition containing a specific anthraquinone dye as a pleochroic dye which, as the guest dye, has a degree of orderness of the alignment (order parameter) in the host liquid crystal in the range from 0.5 to 1, shows remarkable contrast between the colored state and the uncolored state, and is excellent in stability to light, heat, and the like. Further, this invention provides a color guest-host type liquid crystal display device in which said liquid crystal composition has been sealed.
摘要:
Phthalonitrile derivatives represented by the formula (I): ##STR1## (wherein X and Y each represents an alkyl group having 1 to 9 carbon atoms, an alkoxy group havng 1 to 9 carbon atoms, ##STR2## (wherein R.sup.1 represents a hydrogen atom, --C.sub.m H.sub.2m+1, --O--(CH.sub.2 CH.sub.2 O).sub.n --C.sub.m H.sub.2m+1, ##STR3## or a halogen atom, wherein m represents an integer of 1 to 9 and n represents 0, 1 or 2), but at least one of X and Y does not represent a methyl group, and Y does not not represent an alkyl group having 1 to 9 carbon atoms or an alkoxy group having 1 to 9 carbon atoms in the case that X represents R.sup.1 H and R.sup.1 represents an alkyl group having 1 to 9 carbon atoms).