摘要:
A benzoic acid derivative having a large positive dielectric anisotropy value and a superior compatibility, reducing the threshold voltage value of the resulting liquid crystal cell and being very effective for broadening the mesomorphic range of the resulting liquid crystal composiiton and reducing the driving voltage, and a liquid crystal composition containing the derivative are provided, which benzoic acid derivative is expressed by the formula ##STR1## wherein R represents an alkyl group of 1 to 10 carbon atoms and A represents ##STR2##
摘要:
A liquid crystalline compound having a small .DELTA.n value; suitable for preparing a liquid crystal display element having a broad viewing angle; having a large positive .DELTA..epsilon. value; and suitable for preparing a liquid crystal composition having a low driving voltage for liquid crystal display devices, and a liquid crystal composition containing the compound are provided, which compound is expressed by the formula ##STR1## wherein n represents an integer of 0 to 20.
摘要:
Recording and erasing optical information can be done by using an alloy film capable of forming two stable crystalline states differing in crystal texture and optical characteristics by being irradiated with optical energies under different conditions. The memory film includes 35-45 atom % of Indium (In) and 55-65 atom % of antimony (Sb).
摘要:
An optical recording medium using a recording layer of an alloy taking two different crystalline states exhibiting different reflectivities is preferably manufactured by depositing a plurality of layers, each of which consists essentially of an element or an intermetallic compound, i.e. a material having a lower crystallizable temperature, to form a recording layer having a desired average chemical composition, while heating a substrate on which the recording layer is being deposited.
摘要:
A compound having a relatively low viscosity, a broad nematic phase temperature range, a good compatibility with other liquid crystal components at low temperatures and a positive large dielectric anisotropy value, and a liquid crystal composition having a low viscosity and capable of realizing a low driving threshold voltage of display elements are provided, which compound is a cyclohexane derivative expressed by the formula ##STR1## wherein R is 1-10C alkyl group, l is 1 or 2, m is 0 or 1 and l+m=2.
摘要:
A novel tolan type liquid crystal compound having a large optical anisotropy value, a high N-I transistion temperature and also a low viscosity, and a liquid crystal composition containing the same are provided, which compound is a 4-(trans-4"-alkylcyclohexyl-1"-ethyl)-3',4'-substituted- or 4-(trans-4"-alkylcyclohexyl-1'-ethyl)-4'-substituted-tolan expressed by the formula ##STR1## wherein R' represents an alkyl group of 1 to 10 carbon atoms, X' represents a halogen atom of F, Cl or Br and X" represents hydrogen atom or a halogen atom of F, Cl or Br.
摘要:
A novel cyclohexane derivative having a good stability, a low viscosity and a large dielectric aniostropy value and a liquid crystal composition containing the same are provided, which derivative is expressed by the formula ##STR1## wherein R represents an alkyl group of 1 to 10 carbon atoms; A represents hydrogen, halogen or cyano group; l represents 1 or 2; and m represents 0 or 1.
摘要:
Compounds useful as lower viscosity liquid-crystalline components of which liquid-crystalline compositions are partly composed are provided, which compounds areliquid-crystalline compounds expressed by the general formula ##STR1## wherein ##STR2## and R.sub.1 and R.sub.2 each represent an alkyl group of 1 to 8 carbon atoms, orliquid-crystalline compounds expressed by the general formula ##STR3## wherein R.sub.1 and R.sub.2 each represent an alkyl group of 1 to 8 carbon atoms.
摘要:
A novel pyrimidine derivative which, when used as a component of a liquid crystal composition, is useful for driving a liquid crystal cell containing the composition at low voltages, and a liquid crystal composition containing the same are provided, which pyrimidine derivative is expressed by the formula ##STR1## wherein n represents an integer of 0 or 1; R represents an alkyl or alkoxy group of 1 to 10 carbon atoms; and X.sub.1, X.sub.2 and X.sub.3 each represent hydrogen atom, F, Cl or Br as halogeno group, cyano group or trifluoromethyl group and at least one of X.sub.1, X.sub.2 and X.sub.3 is trifluoromethyl group.
摘要翻译:一种新颖的嘧啶衍生物,当用作液晶组合物的组分时,可用于驱动含有低电压的组合物的液晶盒,并且提供含有该组合物的液晶组合物,哪种嘧啶衍生物由 式其中n表示0或1的整数; R表示1〜10个碳原子的烷基或烷氧基; X 1,X 2,X 3各自表示氢原子,F,Cl或Br作为卤代基,氰基或三氟甲基,X 1,X 2和X 3中的至少一个为三氟甲基。
摘要:
A recording medium suitable for writing and reading out information by irradiating a photobeam onto a recording layer at a relatively low power, includes a light transmissible substrate, a light transmissible subbing layer, and a recording layer. The recording layer includes a radiation transmissible substrate, a radiation transmissible subbing layer composed of an inorganic material laminated on the substrate, and a recording layer composed of a sublimable organic substance layer laminated on the subbing layer and a metal layer laminated on the organic layer. Alternatively, the recording layer can include a radiation transmissible substrate, a radiation transmissible subbing layer composed of an inorganic material laminated on the substrate, and a recording layer the composed of a first metal layer laminated on the subbing layer, a sublimable organic substance layer laminated on the first metal layer, and a second metal layer laminated on the sublimable organic substance layer the recording medium has a high photosensitivity and can record information at a high quality (i.e., a high signal-to-noise ratio).