Abstract: This electric-power supplying device comprises switching elements, rectifying elements, and a control circuit. The switching elements are switched according to a switching pulse so as to perform a rectification. The rectifying elements are connected in parallel with the switching elements so as to perform a rectification. The control circuit alters the switching pulse gradually upon switching between the rectification performed by the switching elements and the rectification performed by the rectifying elements.

Abstract: A communication device includes a sub-rack unit and a plurality of plug-in units. The sub-rack unit includes a back wiring board having first connectors arranged in lines thereon, and a frame plate including vertical ribs and placed on said back wiring board so that the vertical ribs separate the lines of the first connectors. Each of the plug-in units includes: a printed board including top and bottom sides and parallel first and second sides, the printed board having second connectors provided on the first side thereof; a metal case including top and bottom faces, and parallel first and second side faces so as to cover the printed board; and first and second spring members. Each of said plug-in units is mounted in the sub-rack unit with the first and second connectors being connected so that the first and second side faces of the metal case are pressed outward against the vertical ribs of the frame plate by resilient forces of the first and second spring members, respectively.

Abstract: A primary side of a transformer has a switching transistor to on-off control the current flowing in a primary winding on a primary side. A secondary side of the transformer has a commutating side FET to be turned on by applying the induced voltage of a tertiary winding on a secondary side of a current transformer, and a flywheel side FET with the primary winding on the primary side of the current transformer connected thereto in series. The current transformation ratio of the current transformer is small in the initial period when the flywheel side FET is turned on, and then, the current transformation ratio is increased by current controlling means comprising a saturable reactor, a diode or the like.

Abstract: On a subscriber's line between an optical network unit and an optical line terminator according to the present invention, an ATM-PON transmission frame is able to be transmitted with an STM signal inserted therein, and an STM-PON transmission frame is able to be transmitted with an ATM signal inserted therein. The ATM signal and the STM signal are transmitted coexisting with each other, whereby an STM network and an ATM network can be integrated on the subscriber's line.

Abstract: The present invention relates to an optical element fixing device, and particularly to a prism mounting device for an optical device using light beam which passes through a prism or lens, a lens fixing device for aligning and fixing the center of a lens with a prescribed optical axis, and a device for fixing a reflecting mirror of an optical device. The invention can easily and securely position the prism to be press-contacted to the lens within a case, in which changes in the magnitude of press-contacting with the passage of time is very small. And, the lens can be securely fixed with its center accurately aligned with a prescribed optical axis. Besides, the reflecting mirror is fixed by a simple structure and a contact between the reflecting mirror and a plate spring is not limited to one point.

Abstract: The present invention can achieve the reliability and simplicity in registering a fingerprint by indicating the quality of a fingerprint image by the number of pseudo minutiae, improve the security of an entrance/exit control system to register a fingerprint, detect the direction of ridge lines of a fingerprint accurately as much as possible, improve the security in checking a fingerprint remarkably, collect renewed registered fingerprint data by a host device and hold the registered fingerprint data of each gate as the latest fingerprint data, improve the operability by enabling to use identification numbers having the less number of digits, and register a fingerprint having a high match rate by automatically applying spatial filtering in re-registering only.

Abstract: The present invention can achieve the reliability and simplicity in registering a fingerprint by indicating the quality of a fingerprint image by the number of pseudo minutiae, improve the security of an entrance/exit control system to register a fingerprint, detect the direction of ridge lines of a fingerprint accurately as much as possible, improve the security in checking a fingerprint remarkably, collect renewed registered fingerprint data by a host device and hold the registered fingerprint data of each gate as the latest fingerprint data, improve the operability by enabling to use identification numbers having the less number of digits, and register a fingerprint having a high match rate by automatically applying spatial filtering in re-registering only.

Abstract: The present invention relates to a method for renewing dictionary image data in a fingerprint identification device, and enables to shorten dictionary identification time and to always keep the dictionary images in the best condition. And, the invention also relates to a dictionary registration and identification method for a fingerprint identification device, by which an identification rate is improved by registering and identifying a plurality of dictionaries. Besides, the invention relates to a method for judging fingerprinting in a fingerprint identification device, by which continuous identification rejections can be prevented. The invention relates to a fingerprinting judging method in a fingerprint identification device, which can prevent misjudgment in fingerprint identification.

Abstract: A synchronous rectifying type DC-DC converter including an auxiliary winding, provided on a secondary side of a transformer, for supplying voltages assuming polarities opposite to each other to control terminals of a rectifying switch and of a fly wheel switch, and the rectifying switch and the fly wheel switch are so constructed as not to be turned ON/OFF by a voltage generated on a supply path of an electric current to a load from a secondary winding of the transformer. When connecting a plurality of DC-DC converters in parallel and operating these converters in parallel, an output of any one of the converters stops, and, even if outputs of the other DC-DC converters are inputted to the DC-DC converter concerned and the electric current flows into the current supply path, a voltage based on the above current is not applied to control terminals of the rectifying switch and of the fly wheel switch. The rectifying switch and the fly wheel switch are not therefore turned ON.

Abstract: The present invention relates to an optical element fixing device, and particularly to a prism mounting device for an optical device using light beam which passes through a prism or lens, a lens fixing device for aligning and fixing the center of a lens with a prescribed optical axis, and a device for fixing a reflecting mirror of an optical device. The invention can easily and securely position the prism to be press-contacted to the lens within a case, in which changes in the magnitude of press-contacting with the passage of time is very small. And, the lens can be securely fixed with its center accurately aligned with a prescribed optical axis. Besides, the reflecting mirror is fixed by a simple structure and a contact between the reflecting mirror and a plate spring is not limited to one point.

Abstract: A dictionary image renewing method in a fingerprint identification device registers images into a dictionary memory as multiple dictionaries. The method includes extracting images from a plurality of fingerprint images determined as being acceptable identification by mutual identification and using the multiple dictionaries to perform identification processing of entered fingerprint images. This includes successively identifying by comparing entered fingerprint images with the dictionary images registered in the multiple dictionaries, and when identification acceptance results with any one of the multiple dictionaries the one dictionary determined as being identification accepted is renewed to the dictionary image registered in any one of the remaining dictionaries. The remaining multiple dictionaries are renewed to the dictionary image extracted from the entered fingerprint images.

Abstract: A fingerprint identification device includes a fingerprint image pickup unit which receives reflected light from a light source to take a picture, and an in-block average luminance calculation unit which divides a fingerprint judging area into a plurality of blocks and calculates average luminance within the blocks according to a multivalued image signal from the fingerprint image pickup unit. A luminance deviation calculation and arrangement unit determines deviation between the in-block average luminance from the in-block average luminance calculation unit and the luminance of each picture element in the judging area to determine the number of picture elements corresponding to the deviation.

Abstract: A current-balance switching regulator in which a plurality of switching power source portions are connected in parallel for the purpose of supplying a stabilized output voltage to a load. Each of the switching power source portions includes a switching control portion for controlling a switching element connected to the primary side of a transformer in accordance with the output voltage on the secondary side of the transformer. Current is detected on the primary side of the portions. When a current unbalance is detected, current balance is arranged by adding the amount of unbalance equally among the portions, so concentration of the load to a particular portion can be prevented. As a result of such averaging, the life of each portion can be lengthened. The portions are connected so that one is made a master and the rest are slaves, so the output voltage can be determined by a variable resistor or the like.