126results about How to "Abnormal operation" patented technology

Power distribution systems that have a limited peak power capability or a high source impedance, such as site supply generators, are often susceptible to abnormal operation in response to the current drawn at power up from the loads connected to the power distribution system. The present invention provides a lighting control system operable to power up a plurality of the lighting loads in sequence to reduce stress on the power distribution system. The lighting loads are each turned on as part of a startup sequence at predetermined times after an output voltage of the power distribution system has stabilized. The lighting control system is operable to begin the startup sequence in response to receiving a control signal representative that the power distribution system has stabilized. The lighting loads are each controlled by a lighting control module, which is operable to wait for a predetermined amount of time for the startup sequence to begin before turning on the lighting loads.

An abnormal operation in which a current flows through a switching device before the end of an off period of the switching device at medium load is eliminated by setting the coupling coefficient of an isolated converter transformer to about 0.7 or lower. A primary side parallel resonance frequency and a secondary side series resonance frequency are set so as to obtain favorable power conversion efficiency characteristics.

A refrigerator having an air-cleaner is provided. The refrigerator includes a main body with a predetermined storage space defined therein, and an air-cleaner including a case fixed to the main body and having at least an inlet and outlet, a decor panel that linearly reciprocates to selectively open and close the outlet, a filter device that filters air sucked through the inlet, a blower that sucks air through the inlet and discharges the air filtered in the filter device through the outlet, and an anion generator that generates anions which are discharged along with the air through the outlet. The air-cleaner is securely mounted to the upper surface of the refrigerator.

An object of the present invention is to prevent the thin film device formed by laser annealing from making, due to overheat, abnormal operations. Firstly, on a glass substrate 101. a heat insulating film, a silicon oxide film and an amorphous silicon film are formed in succession, and the amorphous silicon film is irradiated from above with a laser beam of an excimer laser. After being molten, the amorphous silicon film undergoes recrystallization to form a polycrystalline silicon film. Subsequently, using the polycrystalline silicon film as an active layer, a TFT is formed, and then a plastic substrate is bonded onto the TFT, and finally the glass substrate is peeled off by way of the heat insulating film, whereby a transfer of the TFT is completed. Because the heat insulating film is removed, abnormality caused by overheat at the time of operation is well prevented from occurring.

This photodetecting circuit 1 is capable of suppressing oscillation of an output, and operates as a zero bias circuit in a case of a small photoelectric current to an extent that a dark current is concerned about, and limits an output current in a case of a large photoelectric current to an extent that troubles are caused in the circuit operation. Because a resistive element TR2 is provided in the photodetecting circuit 1, even when a modulation frequency of light, in other words, a frequency of a photoelectric current I flowing in a photodiode PD is made higher, oscillation can be suppressed. Further, due to the resistive element TR2 being inserted, this functions as a limiter as well, and a bias voltage to be applied to the photodiode PD is made to be a positive bias voltage, which prevents an excess current from being generated to suppress abnormal operations of the circuit.

A vehicle occupant detection apparatus includes an image pickup device for imaging an area including a position of a vehicle occupant within a vehicle compartment, a light emitting element for emitting auxiliary light into the compartment that includes the imaging area of the pickup device, and a storage section for storing imaging information provided by the pickup device. The vehicle occupant detection apparatus further including a comparison section for comparing imaging information provided through further imaging by the pickup device and the imaging information stored in the storage section, to provide a difference between the imaging information provided through the further imaging and the stored imaging information, and an abnormality determination section for determining abnormality of the imaging information on the basis of the image information difference.