摘要:
An improved liquid crystal device immune to contamination of the liquid crystal is shown. The liquid crystal is isolated from ion sources such as glass substrates, transparent electrodes or so on by means of a nitride layer positioned therebetween.
摘要:
A liquid crystal device including a unipolar driving source; a pair of substrates, at least one of which is transparent; a chiral smectic liquid crystal layer interposed between the substrates; and an electrode arrangement provided in order to apply an electric field normal to the liquid crystal layer, wherein the opposed inner surfaces of the substrates contiguous to the chiral smectic liquid crystal layer are formed of different materials having different surface energies such that upon application of the unipolar voltage to the chiral smectic liquid crystal, the chiral smectic liquid crystal molecules will be placed in a first state and upon removal of the unipolar voltage, the liquid crystal molecules will be returned to a second state.
摘要:
An improved liquid crystal device for display is disclosed. The device is comprised of a pair of substrates on whose insides a number of electrode strips are formed in a matrix. The electrode strips are formed also near the periphery portions of the substrates which are unnecessary for the pixcels of the display. By virtue of the excess electrode strips, joining the substrates can be done without special attention to the coincidence of the substrates.
摘要:
A method of filling a liquid crystal device with a blended liquid crystal material is set forth. The liquid crystal device is filled by disposing the liquid crystal device having an inlet port, in a vacuum chamber, evacuating the vacuum chamber, supplying the inlet port with the blended liquid crystal material, and elevating the pressure in the chamber to allow the blended liquid crystal material to fill the liquid crystal device through the inlet port by virtue of the differential pressure between the inside and the outside of the liquid crystal device, with the temperature of the blended liquid crystal material being maintained, until the liquid crystal device is completely filled with the blended liquid crystal material, at a temperature higher than the transition temperature of any one of the constituents of the blended liquid crystal material so that the blended liquid crystal material is transformed in its isotropic phase.
摘要:
An improved liquid crystal device for display is disclosed. The device is comprised of a pair of substrates on whose insides a number of electrode strips are formed in a matrix. The electrode strips are formed also near the periphery portions of the substrates which are unnecessary for the pixels of the display. By virtue of the excess electrode strips, joining the substrates can be done without special attention to the coincidence of the substrates.
摘要:
A power generation control system for a vehicle generator comprises a generator including an armature coil, an exciting coil and a rectifier for rectifying the AC output of the armature coil, a battery, and a voltage control device for controlling the activation of the generator in accordance with the terminal voltage of the battery. This power generation control system further comprises an abnormal voltage detector circuit for detecting the voltage generated across the armature coil and cutting off the current flowing in the exciting coil when said voltage exceeds a predetermined value. The abnormal voltage detector circuit has the function to hold this forcible stoppage of power generation.
摘要:
In a voltage control apparatus for an electric generator (1) for vehicles including an armature winding (3), an exciting coil (4), a rectifier (2) for rectifying an a.c. output from the armature winding, and a voltage regulator (5), the voltage regulator comprises a differential amplifier circuit (26) producing a detected voltage corresponding to a difference between a battery charging voltage and a reference voltage, a comparator circuit (30) comparing the detected voltage with a triangular waveform voltage generated at constant periods and producing a pulsed output voltage, a first driver circuit (51) effecting duty-factor-control of an exciting current flowing through the exciting coil in response to the pulsed output voltage, and an initial excitation circuit (32) for causing a predetermined small initial exciting current to flow through the exciting coil intermittently during a time interval after the start of the electric generator.
摘要:
When an engine key switch of a vehicle is closed, a rotor coil of a three-phase a.c. alternator adapted to charge a vehicle-mounted battery is excited by a first controlling circuit. Even with the closure of the engine key switch, the exciting current is restricted to a predetermined value by a second controlling circuit before the alternator has reached a predetermined operating state. The operating state of the alternator is monitored by detecting a voltage at the neutral point of a stator coil connected in star of the alternator.
摘要:
An electro-optical device comprising a display drive system with the display timing related to the unit time t for writing-in a picture element and to the time F for writing-in one picture is disclosed. In the device, a gradated display corresponding to the ratio of the division can be obtained by time-sharing the signal during a write-in of time t without changing the time F.
摘要:
An electro-optical device comprising a display drive system with the display timing related to the unit time t for writing-in a picture element and to the time F for writing-in one picture is disclosed. In the device, a gradated display corresponding to the ratio of the division can be obtained by time-sharing the signal during a write-in of time t without changing the time F.