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300results about How to "Avoid large deviation" patented technology

Active matrix displays having high contrast values

An active matrix display comprises a chiral smectic liquid crystal mixture which has the phase sequence I-N*-SmC*, a spontaneous polarization in the operating temperature range of <40 nC/cm2 and a pitch of >10 mum at at least one temperature in the nematic or cholesteric phase and comprises at least one compound each from at least two of the substance classes (A), (B) and (C) and one or more compounds from substance class (D):(A): compounds comprising two rings which are directly linked to one another and are selected from phenylene-1,4-diyl, pyrimidine-2,5-diyl, pyridine-2,5-diyl and pyridazine-2,5-diyl with the proviso that at least one of these rings is a nitrogen heterocycle;(B): compounds comprising three rings selected from phenylene-1,4-diyl, two of the rings being directly linked to one another and the third ring being linked to one of the other two rings via an -OC(=O)- or -C(=O)-group, with the proviso that at least one of the three rings is fluorophenylene-1,4-diyl or ortho-difluorophenylene-1,4-diyl;(C): compounds comprising three rings which are directly linked to one another and are selected from phenylene-1,4-diyl, pyrimidine-2,5-diyl, pyridine-2,5-diyl and pyridazine-2,5-diyl with the proviso that at least one of these rings is a nitrogen heterocycle;(D): compounds comprising mesogenic groups suitable as components of liquid crystal mixtures.
Owner:MERCK PATENT GMBH

Method for monitoring alternating current discharge on a double electrode and apparatus

Process for monitoring an alternating-voltage discharge between the electrodes of a double electrode and an apparatus. The process includes measuring values of at least one of a discharge current and a discharge voltage for each half-wave within an alternating-voltage discharge period, determining a difference between the measured values of a second half-wave and the measured values of the first half-wave, and comparing the determined differences to specific tolerance values. When the specific tolerance values are exceeded by the determined differences, a power supply is reduced, whereby the discharge is at least briefly suppressed. The apparatus includes a double magnetron including first and second targets arranged to form a double electrode, and a power supply coupled to supply power to the first and second targets. The power supply includes a measurement unit for measuring values of at least one of discharge current and discharge voltage, such that at least one of a discharge current and a discharge voltage for each half-wave within an alternating-voltage discharge period is measured. A device for determining a difference between the measured values of a second half-wave and the measured values of the first half-wave is provided, as well as a device for comparing the determined differences to specific tolerance values, and a device for at least briefly suppressing the discharge when the specific tolerance values are exceeded by the determined differences.
Owner:HUETTINGER ELECTRONICS GMBH & CO KG

Method for measuring distances and speeds of several objects by means of an fmcw radar

A method for measuring distance and velocity at a plurality of objects using FMCW radar, in which measurements are repeated cyclically using at least two different frequency ramps, in each measurement, the transmitted signal is mixed with the received signal, and the spectrum of the mixed signal is recorded, in a matching procedure, the peaks that are in the spectra recorded for various ramps and that belong to the same object are allocated to each other, and the distances and velocities of the objects are calculated from the frequencies of the peaks, and in a tracking procedure, the objects measured at various times are identified with one another on the basis of the consistency of their distance and velocity data, wherein each measuring cycle includes not more than three measurements with different frequency ramps, for each plausible combination of two peaks, of which one was recorded during a first measurement and the other was recorded during a second measurement of the same cycle, the distance and the velocity of one possible object represented by these peaks are calculated, the anticipated result of at least one further measurement is calculated from the distance and the velocity of the possible object, and the possible object is discarded if at least one anticipated result does not agree with the measured result.
Owner:ROBERT BOSCH GMBH
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