Abstract: In a negative step-up charge pump circuit according to the present invention, of a plurality of stages of charge transfer transistors and an output transistor, the former-stage transistors are P channel type field effect transistors, and the later-stage transistors are N channel type field effect transistors. With such configuration, it is possible to avoid start-up failure and current driving performance deterioration resulting from an increase in the number of stages of step-up units without complicating processes and increasing the chip size.

Abstract: A mold is provided in which a molding portion, formed between joint surfaces of upper and lower molds superimposed one upon the other, is filled with UV curable resin after arranging a coating formation portion of an optical fiber in the molding portion, the coating formation portion is coated with the UV curable resin when the resin is cured by irradiating light thereto from outside, and a shading plate is arranged in the periphery of the molding portion. In a case equipped with the mold, there is provided a mirror or a lens for reflecting UV light to UV curable resin.

Abstract: In a drive unit for use with a matrix type display, a buffer circuit (B1) of the power supply circuit of the drive unit has an high-voltage first output circuit (B1p) and a low-voltage second output circuit (B1n) for generating the same output voltage (V1) under a normal operating condition, wherein the high-voltage output circuit (B1p) has enhanced capability of providing output current to bring up the output voltage (V1) and the low-voltage output circuit (B1n) has enhanced capability of providing output current to bring down the output voltage (V1). A voltage (detection voltage Vdet1·4) detected at a node connected to the output end of the buffer circuit (B1) is compared with a bias voltage (V1r). Based on the comparison, the outputs of the first and second output circuits are switched over from one to the other as it is supplied to the display. This facilitates reduction of crosstalks in the display and improvement of the picture quality of the display.

Abstract: In an optical fiber observing image processing apparatus, at least two different capturing modes is provided in an image capturing means for capturing image data from two or more television cameras, so that, by automatically switching capturing modes in synchronous with or independently from progress of the image processing, high speed processing can be achieved regardless of limitation of a data capturing speed. A scanning converting means is provided in a rear stage of the image capturing means, and a plurality of different transfer modes for transferring data between the scanning converting means and the image capturing means are prepared. Further, a delay means may be provided in a front stage of the scanning converting means.

Abstract: An optical fiber coating mold which is comprised of upper and lower molds having joint surfaces, a molding portion where a coating formation portion of an optical fiber can be arranged and a supply passage for supplying UV curable resin being formed between the joint surfaces of the upper and lower molds when the joint surfaces are superimposed one upon the other, the molding portion being filled with UV curable resin after arranging the coating formation portion of the optical fiber in the molding portion, the coating formation portion of the optical fiber being coated with the UV curable resin when the UV curable resin is cured by irradiating light thereto from outside, in which a shading plate is arranged in the periphery of the molding portion. In a case equipped with such a mold, there is provided a mirror or a lens for reflecting UV light to UV curable resin, the mirror or the lens being provided so as to secure the field of view for observation of the interior through an observation window of the case.

Abstract: An optical fiber coating forming device forms a coating of an ultraviolet light hardening type in an optical fiber by precisely controlling an ultraviolet light output of a light source. The optical fiber coating forming device has a light source (2) for irradiating ultraviolet light to resin for coating formation molded to a coating removing portion (4) of an optical fiber core wire (3), a light receiver (5) for detecting intensity of the ultraviolet light by receiving the ultraviolet light irradiated to the resin for coating formation from the light source (2), and an environmental sensor (20) for detecting environmental information. The environmental sensor (20) includes at least a temperature sensor (6) and selectively includes a humidity sensor (7) and an atmospheric pressure sensor (8).

Abstract: An optical fiber coating device that recoats a coating removed portion of an optical fiber with light-curing resin has an observation window through which a mold inside of a shielding lid that covers the mold can be confirmed in a state where the shielding lid remains closed. There is provided an open/close lid that can open/close the observation window. An optical shielding guard plate is provided around the observation window. A filter that cuts off the external light having a specific wavelength is provided on the observation window. There is provided a photo sensor that can detect the amount of light of a light source that irradiates a light onto the light-curing resin, and the amount of light can be automatically adjusted on the basis of the detected result of the photo sensor. An alarm that urges to exchange the light source is raised on the basis of the detected result of the photo sensor. There is provided a TV camera that can capture the interior of the mold and other portions to be observed.

Abstract: An optical fiber resin coating apparatus having an ultraviolet flash lamp used for coating an optical fiber by an ultraviolet curing resin, a lamp lighting circuit for making the ultraviolet flash lamp emit light, and a control circuit for controlling this lamp lighting circuit. The control circuit detects the intensity and emission time of ultraviolet light emitted from the ultraviolet flash lamp by an ultraviolet sensor and supplies a voltage and excitation time to the power source for exciting the ultraviolet flash lamp based on this. As the ultraviolet light source, at least one ultraviolet laser diode or ultraviolet light emitting diode may be used instead of an ultraviolet flash lamp. The ultraviolet light source may be arranged to emit ultraviolet light so that the coating portion of the ultraviolet curing resin exhibits an inclined profile where the intensity of the ultraviolet light gradually changes according to the position.

Abstract: A wavelength monitoring device is provided with a deinterleaver for separating a multi-wavelength optical signal, comprised of densely spaced channel signals, into first and second channel signal groups each comprised of low-densely spaced channel signals in accordance with their wavelength, and two wavelength monitoring circuits for separating the first and second channel signal groups into individual channel signals, respectively. Alternatively, an optical switch for alternately monitor the first or second channel signal group is interposed between the deinterleaver and one of the wavelength monitoring circuits, with another wavelength monitoring circuit omitted.

Abstract: A vertically-placed TV camera to be disposed such that the direction of scanning lines thereof is orthogonal to the optical axis of an optical fiber or the like to be connected and a laterally-placed TV camera to be disposed such that the direction of the scanning lines thereof is parallel to the same optical axis are prepared, so that images from those TV cameras can be displayed on a TV monitor. Further, an image processing portion capable of outputting an image from the TV cameras to the TV monitor and processing the image from the TV camera and outputting desired information about the optical fibers to be connected is provided, and each of the aforementioned TV cameras is provided with an optical system. The optical system of the TV camera has a higher magnification than that of the TV camera. The image processing portion turns an image from the TV camera at 90° and matches an image from the TV camera therewith in terms of the scanning direction and outputs the image to the TV monitor.

Abstract: An optical fiber coating device that recoats a coating removed portion of an optical fiber with light-curing resin has an observation window through which a mold inside of a shielding lid that covers the mold can be confirmed in a state where the shielding lid remains closed. There is provided an open/close lid that can open/close the observation window. An optical shielding guard plate is provided around the observation window. A filter that cuts off the external light having a specific wavelength is provided on the observation window. There is provided a photo sensor that can detect the amount of light of a light source that irradiates a light onto the light-curing resin, and the amount of light can be automatically adjusted on the basis of the detected result of the photo sensor. An alarm that urges to exchange the light source is raised on the basis of the detected result of the photo sensor. There is provided a TV camera that can capture the interior of the mold and other portions to be observed.

Abstract: A method of forming a coating and an apparatus for forming a coating on an optical fiber capable of improving the work speed in recoating a coating forming portion of the optical fiber are provided. A coating removed part of a coated optical fiber, which is the portion where a coating of the optical fiber is formed, is set in a mold. A light-curing resin is provided on the coating removed part. Then, with the light-curing resin heated to the glass transition temperature thereof by a Peltier element, a heater and a temperature control unit, a light for curing is irradiates from a light source to cure the light-curing resin.

Abstract: An optical fiber coating forming device forms a coating of an ultraviolet light hardening type in an optical fiber by precisely controlling an ultraviolet light output of a light source. The optical fiber coating forming device has a light source (2) for irradiating ultraviolet light to resin for coating formation molded to a coating removing portion (4) of an optical fiber core wire (3), a light receiver (5) for detecting intensity of the ultraviolet light by receiving the ultraviolet light irradiated to the resin for coating formation from the light source (2), and an environmental sensor (20) for detecting environmental information. The environmental sensor (20) includes at least a temperature sensor (6) and selectively includes a humidity sensor (7) and an atmospheric pressure sensor (8).