摘要:
A liquid crystal composition comprising a host liquid crystal material and at least one guest novel anthraquine dye dissolved in said host liquid crystal material has a high order parameter, sufficient solubility in the host liquid crystal and high stability.
摘要:
The description is concerned with a liquid crystal composition of the guest-host type which contains a pleochroic dye dissolved therein. The dye molecule has an end group or end groups in the molecule represented by the general formula: ##STR1## where Ro designates a straight chain of alkyl group, in which methylene group not adjacent to the nitrogen atom may be substituted by oxygen atom or sulfer atom; R1 designates an alkyl group having a chain length different from that of the alkyl group of Ro or a group ##STR2## in R1 a methylene group not adjacent to the nitrogen atom may be substituted by oxygen atom or sulfur atom, and R2 designates hydrogen atom, alkyl group, alkoxy group, cycloalkyl group or dialkylamino group.
摘要:
A liquid crystal display element which may have a multi-layer structure comprising substrates having electrodes and liquid crystal orientation controlling films on the sides thereof facing a liquid crystal layer and one or more liquid crystal layers interposed between said substrates, characterized in that the liquid crystal orientation controlling film is made from a copolymer produced by reacting a dibasic acid dihydrazide, a diamine and a tetracarboxylic acid dianhydride, followed by ring closure and dehydration with heating, is excellent in transparency and the electrode (partially reflected) pattern is hardly observable.
摘要:
A variable resistor suitable for use in the tone control of a stereo tape player or the like has two resistance bodies formed on an insulating substrate plate so as to oppose one another. Under one of the resistance bodies is formed a lead conductor, through an interposed insulating layer. The lead conductor is connected to one end of the associated resistance body and leads to the other end portion of this resistance body, so that the terminals of both resistance bodies can be located at the same side of the insulating substrate plate, thereby to diminish the size of the variable resistor.
摘要:
A nematic liquid crystal composition having an improved response to a pulsating driving voltage for effecting a dynamic scattering mode which comprises a predominant amount of a nematic liquid crytal having properties of the dynamic scattering mode and 0.001 to 3% by weight of an onium halide salt having a nitrogen atom as a nucleus, the composition further containing a phenolic compound for improving the solubility of the onium halide salt in the lqiuid crystal and assisting in increasing the degree of dissociation of the neutral onium halide salt to ions.
摘要:
A nematic liquid crystal composition having an improved responsibility to a pulsating driving voltage and a prolonged descent time of dynamic scattering mode which comprises a predominant amount of a nematic liquid crystal having properties of dynamic scattering mode, 0.1 to 1 % by weight of a cholesteric compound and 0.01 to 5 % by weight of a halide of an organic quaternary nitrogen compound.
摘要:
A boundary lubricant film 1 is formed on a stamper 22 contact portion of a stationary mirror 21 and/or a stationary mirror 21 contact portion of the stamper 22. The boundary lubricant film 1 contains one of kinds of phosphate esters. A material is injected into a cavity 14. As a result, a disc substrate for an optical disc is molded.
摘要:
A linear motor apparatus which drives a mover of a linear motor in a stable manner, by using only information on change of relative position, without using an absolute value sensor. The apparatus has a coil array of plural phases of coils and a magnet relatively movable to the coil array, plural drivers, at least one of which being provided for each phase, to feed a current to all the same phase coils of the coil array, a sensor for measuring a change of relative position of the magnet moved by the current to the coil array, and a controller to determine the polarity of the current applied to the same phase coils based on the change of the relative position measured by the sensor, and apply a drive current to drive the magnet in a desired direction to the same phase coils.
摘要:
This invention is a ready-made bite control point which aims at easing the dentist to form the projections on the tooth side without a specialized tool and comprises a swelling to be fitted into a side hollow of a positioner for tooth-straightening employed in the dental treatment of open bite.
摘要:
A method of determining the number of bacteria in a sample which involves introducing a sample containing bacteria into a tubular filtering vessel holding therein a hydrophobic filter for bacterial detection, a coloring composition is disposed on the side of the filter where the sample is introduced into the vessel, and a support for the filter is disposed on the opposite side of the filter from the coloring composition. The bacteria is subjected to and the sample is filtered dyeing sample by suction from the support to collect the dyed bacteria on the filter and remove the excess of coloring matter. The number of the bacteria in the sample is determined from the degree of staining of the filter.