Abstract: An impedance conversion circuit for the use with a video apparatus, an audio apparatus, or a communication apparatus is provided. The impedance conversion circuit can be used at a frequency higher than that conventionally used and is suitable for formation as an integrated circuit. A video apparatus using this impedance conversion circuit, and the like are also proposed. Driving current is supplied to first and second terminals of an impedance circuit in accordance with voltages of first and second input terminals, respectively, and current is made to flow out of the second and first output terminals in accordance with the first and second terminal voltages of the impedance circuit, respectively.

Abstract: A remote control signal transmission device includes a plurality of operation keys; a detector for detecting which operation keys have been operated; a memory for storing correspondence tables between the operation keys and remote control signals, with each of the correspondence tables differing depending on an electronic apparatus taken as a remote control target; a setter that receives a detection output of the detector and, when consecutive operation of a pre-defined plurality of said operation keys is detected as the detection output, selects a correspondence table for an electronic apparatus corresponding to the consecutive operation from within a plurality of the correspondence tables stored in the memory; a remote control signal generator, the signal from which corresponds to an operated key according to a correspondence table set by the setter and transmitting the remote control signal to electronic apparatus taken as the control target; and a setting protector for protecting settings of the setting m

Abstract: A deposit removal high pressure spray apparatus for removing heat conduction inhibiting deposits on U-tubes at the top of a shell and tube type of nuclear steam generator (10) tube bundle (16) by crawling along flanged outboard support beams (18) above the U-tubes bundle. The apparatus includes: a crawler (66) with motive means 68 for "inch worm" movement; a rotationally driven base 62 provides movement of the sprayhead to either side of the outboard support beam; a rotationally driven extension arm 60 on rotating base 62 has an elongated reciprocally driven elevator 58 thereon; and, a wrist 52 reversibly and rotatably driven by motor 54a sweeps sprayhead 52 with nozzles 56 to clean the top of the bundle 16 tube lanes of 90.degree., 45.degree. and 135.degree. efficiently.

Abstract: A measurement device including a measurement unit, a signal processing unit having a serial interface and connected to the measurement unit for processing signals obtained at the measurement unit, and a photocoupler connected to the serial interface of the signal processing unit for converting processed signals into the optical information, is disclosed. A measurement system made up of a plurality of the measurement devices and a method for measuring an object using the measurement device are also disclosed.

Abstract: A method of insulating a cathode ray tube and enabling an electrical insulator to be produced without material loss and enabling improvement of the bonding strength between a stem and a stem base, which comprises a base through which pin through holes are formed and has provided projecting from the front surface thereof a tip holder, in a state with the stem pins inserted through the pin through holes and the tip held in the tip holder, said method comprising the steps of molding an electrical insulator composition comprising an uncured self-adhesive silicone rubber into a predetermined sheet shape by using a transfer mold to obtain an electrical insulator, arranging the electrical insulator in a state extending from the positions of the pin through holes on the back of the base of the stem base to the tip holder and adhering it to the back of the base, folding the portion of the electrical insulator extending to the tip holder to the inside surface of the tip holder, and attaching the stem base to the stem.

Abstract: An objective lens, a reproducing apparatus and a reproducing method using a single objective lens for a DVD which can also read a CD without adding any peripheral member can be obtained. In an objective lens which is arranged so that a light beam emitted form a common light source (11) may be focused through a common objective lens (8) on respective signal recorded surfaces (1a), (2a) of a DVD (2) and a CD (1) having light transmitting layers (1c), (2c) of different thicknesses, an area of the objective lens (8) for the DVD (2) in a range of a numerical aperture NA from 0 to 0.3-0.4 from the light axis is worked to form correcting lens surface 8a for correcting the aberration caused when reading the CD (1) through the objective lens for the DVD (2), thereby allowing the CD to be read through the objective lens for the DVD.

Abstract: Disclosed are a photosensitive composition which is developable with an aqueous alkaline solution and such calcined patterns as a conductor pattern, a vitreous dielectric pattern, and a fluorescent pattern which are obtained by the use of the photosensitive composition. The photosensitive composition comprises (A) a carboxyl group-containing photosensitive polymer obtained by the reaction of a copolymer of (a) an unsaturated double bond-containing acid anhydride and (b) an unsaturated double bond-containing compound with (c) a compound containing a hydroxyl group and an unsaturated double bond, (B) a diluent, (C) a photopolymerization initiator, (D) an inorganic powder, and (E) a stabilizer. The composition may be in the form of paste or in the form of a dry film. When the photosensitive composition is in the form of paste, the paste is applied to a substrate and then dried to form a film. When the photosensitive composition is in the form of a dry film, the film is laminated on the substrate.

Abstract: A magnetic-head short-circuit detector for correctly detecting an electrical short-circuit between coil terminals of a magnetic head. Terminals H.sub.X and H.sub.Y of the magnetic head are connected to the bases of a pnp-transistors P.sub.1 and P.sub.2 respectively. Current sources I.sub.1 and I.sub.2 are inserted between power supply V.sub.CC and the emitters of the transistors P.sub.1 and P.sub.2 respectively. The emitter of the transistor P.sub.1 is connected to the (-) input terminal of a comparator 1 through a resistor R.sub.1 and directly to the (+) input terminal of a comparator 2. The emitter of the transistor P.sub.2 is connected to the (+) input terminal of the comparator 1 through a resistor R.sub.2 and directly to the (-) input terminal of the comparator 2. A current source I.sub.3 is connected between the (-) input terminal of the comparator 1 and GND. A current source I.sub.4 is connected between the (input terminal of the comparator 2 and GND.

Abstract: A liquid crystal modulation element and a projection-type liquid crystal display apparatus are provided for maintaining color purity and improving luminance of an image. Microlenses each provided for every three pixel electrodes condense color rays of B, R and G incident at mutually different angles and have the rays enter the pixels of the respective colors. Trimming filters are each provided on the respective pixel electrodes for intercepting rays leaking onto the own pixel electrode of the color rays to enter the neighboring pixel electrodes. As a result, a reduction in color purity due to color mixture is prevented even if the incident divergence angles of the color rays entering a liquid crystal panel are large. Since the incident divergence angles may be relatively large, the amount of diaphragming in the optical projection system may be reduced. A large quantity of light is thereby obtained.

Abstract: A semiconductor memory device which can reduce the size of a memory cell and increase the packing density is disclosed. Each memory cell comprises a p-type active region, an n-type active region, two word lines, a common gate line and a common gate line. Two memory cells are deviated by, for example, an amount of a half bit in the direction which perpendicularly crosses the word line direction. The memory cells are arranged with one of their parts overlapped with one another in the word line direction. Thus, the size of the memory cell can be reduced in the word line direction.

Abstract: A flashlight for use in emergency situations includes a front light, a rear light, a translucent body with lights underneath to serve as a light beacon, and pivotable legs for supporting the flashlight in a freestanding position. When the legs are pivoted away from the flashlight body, a normally open switch closes, automatically turning on the lights in the translucent body and operating the flashlight as an emergency light beacon. The material used in the translucent body and/or the lights in the body are preferably colored red to designate an emergency situation. Front and rear light sources on the flashlight, which can be adjustable, provide ambient and task lighting in the same manner as conventional flashlights. The flashlight may include a cigarette lighter adapter and rechargeable batteries as an alternative power source to conventional batteries.

Abstract: A drive circuit of a light emitting element capable of setting a desired constant current and capable of operating stably at a high speed while holding a forward direction voltage required for the emission of light even under a low power supply voltage, wherein there is provided an input circuit which receives differential drive signals and outputs differential signals of levels in accordance with the level of a supplied drive voltage, a differential output circuit in which an emitter-connection portion of transistors is grounded via a resistor, the differential signals and are supplied to bases, and a laser diode is connected to a collector of the transistor, a reference voltage generation circuit which generates a reference voltage, a comparison circuit which compares the voltage of the emitter-connection portion with the reference voltage and outputs a signal of the level in accordance with the result of comparison, and a variable voltage supply circuit which generates a voltage in accordance with the inpu

Abstract: A latch-type sensing circuit comprising a first inverter and a second inverter, where at least the first inverter has a variable threshold value of logical inversion. The inverters can have two transistors, where each transistor can have source/drain regions, an channel forming region interposed between the source/drain region, and a floating electrode formed above the channel-forming region through a first insulating layer. There features result in a more simplified circuit configuration.

Abstract: A laser actuated keyboard system (10) includes a laser pointer (12) mounted on an adjustable headband (14) for directing a collimated beam (16) onto a laser keyboard (18) defined by an array of photosensors (58) that are intended to be illuminated by the user-targeted beam (16). During a laser acquisition mode, the laser pointer (12) output is controlled to provide a relatively retina-safe output and during the captured signal mode, the laser pointer (12) output is controlled to provide a higher-power mode sufficient to be easily seen. During the higher-power mode, the laser pointer (12) is modulated at a selected frequency to assist the laser keyboard (18) in discriminating against common background light. A successful keypress is declared when the beam (16) illuminates a targeted area for a selected percentage of a pre-determined dwell period.

Abstract: A semiconductor photosensitive element comprises first and second photosensitive regions. The first photosensitive region is different from the second photosensitive region in its structure and thereby the first photosensitive region has photoelectric conversion characteristic and frequency characteristic which are different from those of the second photosensitive region.

Abstract: A recording/reproducing apparatus for an optical recording medium which is used for recording and/or reproducing information on/from the optical recording medium by irradiating the optical recording medium with a laser light using two-group objective lenses comprising at least two lenses as the first and second lenses, is provided so as to comprise a light source emitting the laser light, the first lens for focusing the laser light emitted from the light source, the second lens arranged between the first lens and the optical recording medium, and a device for moving both the first and second lenses relative to each other to change the distance between them in the optical axis direction of the laser beam, so that the moving device moves the second lens to change the distance between the first and second lenses.

Abstract: Disclosed is a method of accurately, simply forming a light absorbing layer for improving contrast in a transmission screen including micro glass beads two-dimensionally arranged. A light absorbing layer made from toner is formed on glass beads held in a transparent adhesive layer up to a thickness sufficient to cover the glass beads. The light absorbing layer is irradiated with parallel rays of light in the direction from a transparent substrate, to melt and remove only a portion of the light absorbing layer positioned over a light outgoing portion of each glass bead by the energy of the rays of light converged through the glass bead. By suitably selecting a material of the light absorbing layer, openings can be formed in the light absorbing layer by means of combustion, sublimation or ablation due to the energy of the converged rays of light.

Abstract: A disc player provided with an optical pick-up including plural object lens so that write and read operations of information signals can be carried out with respect to plural kinds of discs in which thicknesses of transparent bases are different from each other. In order that tracking error signal can be satisfactorily detected even in the case where either one of object lenses is used, a biaxial actuator 3 for supporting an object lens 5 moved on a line which is off the central axis C of a spindle motor 17 is disposed in a manner inclined by a predetermined angle .theta. with respect to the axis of a guide shaft 18, and movement operation direction of the object lens 5 is caused to be close to the direction perpendicular to recording tracks of the optical disc caused to undergo rotational operation by the spindle motor 17.

Abstract: Disclosed herein is a fractional N-type PLL frequency synthesizer apparatus. A fractional N-type control circuit employed therein for varying N values for each reference cycle is constructed of a combination of a frequency divider (comprising D flip-flops) and a logic circuit (comprising an exclusive OR circuit, AND circuits and an OR circuit), taking the timing provided to output a carry signal into consideration in advance. Owing to such a construction, the fractional N-type PLL frequency synthesizer apparatus can be activated with low noise and can provide a short lockup time.

Abstract: A digital controlled oscillation circuit which has a wide oscillation frequency range and continuous and smooth transition of the oscillation frequency and can prevent occurrence of jitter: in which provision is made of a first delay circuit for delaying a first signal by a control signal and outputting the same as a first delay signal; a second delay circuit for delaying a second signal by the control signal and outputting the same as a second delay signal; an RS FF which switches a first output signal from low to high and switches a second output signal from high to low and outputs the same when receiving as its input the first delay signal, while switches the first output signal from high to low and switches the second output signal from low to high and outputs the same when receiving as its input the second delay circuit; and first and second switching detection circuits for generating first and second delay circuits when detecting that the first and second output signals switch from high to low.