摘要:
A liquid crystal element of a layered type capable of high contrast is provided. For example, in the liquid crystal element of the layered type including liquid crystal layers b, g and r in this order, each of the liquid crystal layers b, g and r is held between electrode formation surfaces of a pair of substrates each provided with an electrode, an insulating film is disposed between the electrodes of the substrates, and at least two liquid crystal layers of the liquid crystal layers b, g and r have the insulating films opposed to the liquid crystal layers and being different in refractive index from each other, respectively.
摘要:
Disclosed is a liquid crystal display having stacked liquid crystal light modulation layers each containing a liquid crystal compound. At least one of the liquid crystal modulation layers is different from remaining ones in at least one of a dielectric anisotropy, a thickness, a liquid crystal compound contained therein, and a functional layer provided therein so that the drive voltage ranges for the layers are made equal.
摘要:
A display optical apparatus is provided with: a polarizing plate transmitting illuminating light having a predetermined polarization direction; a reflective liquid crystal display device reflecting the illuminating light transmitted by the polarizing plate as projected light of a polarization condition that differs according to pixel information for each pixel; and a phase plate changing the polarization conditions of the illuminating light and the projected light and directing the illuminating light and the projected light to the polarizing plate. The phase plate is disposed between the reflective liquid crystal display device and the polarizing plate. The black level of the projected light is adjusted by rotating the principal axis direction of the phase plate.
摘要:
A method of making a liquid crystal device having a plurality of cells of liquid crystal material, includes the steps of: (a) preparing a first base having a first surface; (b) providing a first phase of a material and a plurality of second phases of at least one liquid crystal material on the first surface, said second phases being spatially dispersed in a first prescribed pattern; (c providing a second base having a second surface, the second surface being substantially in contact with the first and second phases; and (d) solidifying the material of the first phase. The liquid crystal cells are formed of the dispersed liquid crystal materials. The plurality of second phases may include at least a group of liquid crystal materials which exhibits a cholesteric characteristic having a selective reflection wavelength in the visible range and a group of liquid crystal materials which exhibits a cholesteric characteristic having a different selective reflection wavelength in the visible range.
摘要:
A body and an arm are produced as separate components, a fitting recess and a flange are formed on the body, and a magnetic head mounting portion, a fitting portion capable of being fitted to and removed from the fitting recess of the body, and an engagement portion engaging with the flange of the body and prevented from falling off in an axial direction are formed on the arm. At least two fitting recesses are formed in an interval in the axial direction of the body. The arm is fitted to the body, and the fitting portion is molded by a resin to the body. A moving coil of a motor is molded to the body. The fitting portion of the arm is shaped into a ring shape. The fitting portion is shaped into the ring shape having a transverse opening. A rotary bearing having, or not having, a sleeve is fitted into a shaft hole of the body.
摘要:
Before hexafluoropropene oxide (HFPO) is polymerized in a polymerization initiator solution of a polymerization initiator of the formula: CSOCF.sub.2 --Rf--CF.sub.2 OCs wherein Rf is a perfluoroalkylene group which may have an ether bond in an aprotic polar solvent, the initiator solution is treated by adding a perfluoroolefin thereto at a sufficient temperature for the removal of protonic substances, cesium fluoride and hydrogen fluoride. This simple treatment restrains chain transfer reaction, and the process is successful in producing a difunctional HFPO polymer having a high degree of polymerization while suppressing formation of a monofunctional HFPO polymer.
摘要:
A liquid crystal element includes a pair of plates at least one of which is transparent, and a composite layer retained between the plates and including a liquid crystal material in a transparent resin substrate. In the liquid crystal element, (A) the liquid crystal material in the composite layer contains aromatic rings and exhibits a cholesteric phase, the substrate in the composite layer is made of resin and contains aromatic rings, and a ratio of the number of aromatic rings to that of carbon atoms in the main chain of monomer is in a range from 1:5 to 1:12; (B) the liquid crystal material in the composite layer is formed of a mixture of a liquid crystal material exhibiting a nematic phase and a liquid crystal material exhibiting a smectic phase, and exhibits a cholesteric phase as a whole; or (C) the liquid crystal material in the composite layer is formed of a mixture of a tolane liquid crystal material, a biphenyl liquid crystal material and a chiral ingredient, and exhibits a cholesteric phase as a whole.
摘要:
A cyclotrisiloxane represented by the general formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 may be the same or different and are each an alkyl group of 1 to 3 carbon atoms and X is a cyclohexyl group or an alkyl group expressed by the formula:--C.sub.n H.sub.2n+1where n is an integer of 4 to 15. The cyclotrisiloxane is useful as an intermediate for producing silicone oils and silicone rubbers, and the obtained silicone oils and silicone rubbers are excellent in lubricity.
摘要:
A chain organopolysiloxane is obtained by polymerizing a fluorine-containing cyclotrisiloxane of the general formula: ##STR1## (wherein R.sup.1 is a monovalent hydrocarbon group, and Rf is a perfluoroalkyl group or perfluoroalkyl ether group)in the presence of a lithium silanolate catalyst, silylating the resulting polymerization product, and treating the silylated product at a temperature of not lower than 100.degree. C. under a reduced pressure of not higher than 10.sup.-1 mmHg to remove volatile components therefrom. The organopolysiloxane is essentially free of volatile low-molecular siloxanes. Therefore, the chain organopolysiloxane can be used without the problems which might arise from the volatile low-molecular siloxanes, such as evaporation of low-molecular siloxanes from a cured rubber product with the result of electrical-contact troubles.
摘要:
A malfunction detecting apparatus for an evaporated fuel purge system includes a first control valve for controlling a flow of fuel vapor in a purge passage between a canister and an intake passage, a second control valve for controlling a flow of air from the atmosphere to the canister via an air inlet opening of the canister, a first control part for turning OFF the second control valve and for turning ON the first control valve during a first time period, so as to subject the purge passage, the canister, and a vapor passage to a negative pressure of the intake passage during the first time period, and a first discriminator for detecting whether or not a malfunction has occurred in the system, in accordance with a pressure change rate derived from pressures of the system sensed at a start of the first time period and at an end thereof. The apparatus further includes a second control part for detecting whether or not a pressure of the system reaches a prescribed negative pressure after it is detected that no malfunction has occurred in the system, and for turning OFF the first and second control valves during a second time period after the prescribed negative pressure is reached, and a second discriminator for detecting whether or not a malfunction has occurred in the system, in accordance with a pressure change rate derived from pressures of the system sensed at a start of the second time period and at an end thereof.