Abstract: A direct-current stabilized power supply device for stepping down an input voltage from a solar cell, including: a first constant voltage power supply circuit connected to the solar cell and including a constant current limiter circuit; a switch circuit; a switching-type second constant voltage power supply circuit connected to the switch circuit; and a voltage detection circuit that detects the output voltage of the first constant voltage power supply circuit. When the detected output of the first power supply circuit is equal to or higher than a first determination voltage, the switch circuit is closed, and power is supplied to the load from the second power supply circuit, and when the detected voltage is equal to or lower than a second, lower, determination voltage the switch circuit is opened, and the power supplied from the second power supply circuit is stopped.

Abstract: The present invention provides an apparatus for easily detecting an abnormal status of power generation of a solar cell panel in a solar cell power generation system having the power generation of 1 MW or higher. The present invention provides an abnormality detecting apparatus for a solar cell power generation system including a plurality of solar cell strings each having a plurality of solar cell modules connected to each other in series and a backflow preventing diode connected to a power output terminal of each of the solar cell strings, characterized in that the abnormality detecting apparatus further includes measuring means for measuring a current flowing in the backflow preventing diode; and that the measuring means is supplied with electric power from both terminals of the backflow preventing diode.

Abstract: A failure detecting method for a solar power generation system having plural solar cell strings in each of which plural solar cell modules are connected to each other in series. Specifically, by comparing the current value of each of the solar cell modules or strings with the average current value per one module or string, calculated from the total current value of the entire solar cell modules or strings, one or more failure candidates can be detected with high precision.

Abstract: A direct-current stabilized power supply device that drops a voltage from a power supply of a solar cell in which output power is unstable, and supplies a stable voltage necessary for measurement equipment and the like.

Abstract: The present invention discloses a failure detecting method for a solar power generation system having plural solar cell strings in each of which plural solar cell modules are connected to each other in series.

Abstract: The present invention provides an apparatus for easily detecting an abnormal status of power generation of a solar cell panel in a solar cell power generation system having the power generation of 1 MW or higher. The present invention provides an abnormality detecting apparatus for a solar cell power generation system including a plurality of solar cell strings each having a plurality of solar cell modules connected to each other in series and a backflow preventing diode connected to a power output terminal of each of the solar cell strings, characterized in that the abnormality detecting apparatus further includes measuring means for measuring a current flowing in the backflow preventing diode; and that the measuring means is supplied with electric power from both terminals of the backflow preventing diode.

Abstract: A method of exposing an object from both sides thereof, wherein the object has photosensitive material coated on both sides thereof and it is held between a first mask plate provided with a first masking pattern and a second mask plate provided with a second masking pattern.

Abstract: An exposure apparatus for color cathode ray tube having a single faceplate with a phosphor screen on an inner surface thereof comprises light source device including an initial light source for emitting ultraviolet light, exposure device including a base for supporting the faceplate with a photosensitive layer having a plurality of sub-regions to form the phosphor screen, a plurality of secondary light sources emitting exposure light for exposing corresponding sub-regions and moving device for shifting position of the secondary light sources, and light distribution device for equally distributing a part of ultraviolet light emitted from the light source device to the secondary light sources.