Abstract: It is an object of the present invention to offer a headlamp cleaning device which is always capable of attaining a constant cleaning capacity by keeping the ejected quantity of the cleaning fluid constant for a single cleaning operation without any regard to the fluctuations in the voltage of the electric power in the power source.The headlamp cleaning device according to the present invention is provided with an electric power source voltage monitoring means which monitors the power source voltage as applied to a cleaning device motor. This device furnishes the power source voltage to the electric power supply time setting means. When a cleaning device switch 9 is turned ON, the electric power supply time setting means 10-2 sets the driving time T to a longer time period when the value of the electric power source voltage is low, but sets the driving time T to a shorter period when the value of the electric power source voltage is high.

Abstract: A headlamp for a motor vehicle with a linear bubble tube type level vial 60 for detecting a vertical inclination of a vial 60 in which the reflector 14 is supported so as to be tiltable with respect to a lamp body 10 within a lamp chamber S defined by the lamp body 10 and a front lens 12, and the vial 60 contains a linear bubble tube 64 substantially horizontally and longitudinally disposed, characterized in that the level vial 60 is extended rearward from the rear wall of the reflector 14, whereby the level vial 60 is located apart from a heat source (bulb 16), thereby impeding the transfer of the heat to the linear bubble tube 64 of the level vial 60. A rear expanded portion 11 enclosing the level vial 60 is additionally formed to the lamp body 10, without increasing the size of the whole lamp body 10 in connection with the level vial 60. With this unique structure, the increase of the size of the lamp body 10 is not so much.

Abstract: In a color changing lamp equipped with a bulb 4 emitting a color of light, a glove with a different color from the color is selectively located on the covering position and exposure position of the bulb 4 in order to emit the different color of light. The current supply for the bulb 4 is stopped while the glove is selectively moved, thereby preventing different colors of light in a mixed state from being emitted on the way of exchange.

Abstract: A lighting circuit reduces the chance of shifting the generation timing for a start pulse with respect to the polarity of a rectangular wave. The lighting circuit has a start pulse generator which is designed to generate a start pulse only when the rectangular wave voltage obtained by a DC-AC converter has a certain polarity. A lighting discriminating circuit discriminates the ON status or OFF status of a discharge lamp. A lighting frequency controller is provided to alter the lighting frequency so that the frequency of the rectangular wave output from the DC-AC converter when the OFF status of the discharge lamp is discriminated becomes lower than the frequency of the rectangular wave output from the DC-AC converter when the ON status of the discharge lamp is discriminated.

Abstract: Disclosed is a lighting circuit for a vehicular discharge lamp, which can accurately and promptly detect an abnormal status to thereby improve the reliability and safety usage. When a lighting switch in the lighting circuit is set on, a batter/voltage is boosted by a DC booster circuit and then converted into an AC voltage by a DC/AC converter before being supplied to a metal halide lamp. When power supply continues with the lamp in an open-circuit state or a short-circuited state, a fire may be set or an electric-shock originated accident may occur. An abnormality detector for detecting an abnormal status is provided to cope with such a problem. The abnormality detector detects the output voltage of the DC/AC converter, very close to the lamp voltage, determines that the lamp in the open-circuit state when the detected level is equal to or above a predetermined value and determines that the lamp in the short-circuited state when the detected level is equal to or below a predetermined value.

Abstract: A vehicular cornering lamp system which can be adapted to all types and models of vehicles without having to change the correspondence of the illuminating angle with specific characteristics of the vehicle. The angular velocity of the vehicle is detected when the vehicle is traveling on a curve by an angular velocity sensor. Pulses from a distance sensor are counted to detect the vehicle's velocity. Angular velocity data and vehicle velocity data are latched by respective latch circuits. The reciprocal of the turning radius is calculated directly by dividing the angular velocity data by the vehicle velocity data in a divider. There is carried out an arithmetic operation of calculating the reciprocal of the turning radius after calculating the turning radius by dividing the vehicle velocity data by the angular velocity data. The illuminating angle can be approximated as a simple inverse function with respect to the turning radius.

Abstract: A reflector consists of a reflecting portion and a wall portion surrounding it and is rectangular when viewed from the front side. A reference curve is formed on a horizontal plane including the optical axis by connecting outer portions of a parabola having a focus F1 located on the optical axis and a focal length f1, and portions of two parabolas having foci F2 and F2' located on their axes parallel with the optical axis and a focal length f2 (>f1). A reflecting surface is formed as a collection of cross-sectional curves each obtained by cutting an imaginary paraboloid of revolution set for each point on the reference curve and having an axis extending along a ray reflected at that point after being emitted from the focus F1 by a vertical plane including the axis of the paraboloid of revolution.

Abstract: An insulating base for a discharge lamp device which provides good insulation between a lead support connected to a front end lead of an arc tube and a lead disposed on the rear side of the arc tube. The insulating base includes a base main body formed of synthetic resin. The base main body is a disk-shaped injection molding which includes a lead support insertion hole in the form of a first longitudinal through hole for mounting a lead support supporting the front end portion of an arc tube and acting as a current path to a lead disposed on the front side of the arc tube, and a lead insertion hole in the form of a second longitudinal through hole for insertion of a lead disposed on the rear end side of the arc tube.

Abstract: An automobile headlamp in which an illumination angle of the headlamp can be adjusted laterally by pivoting a reflector right to left with respect to a lamp body. A leveling device for measuring the lateral inclination of a reflector is held between the reflector and a lamp body. The leveling device includes tubular holders which are fixedly fitted into the holder fitting hole of the lamp body and extend longitudinally, a sliding rod which is slidably fitted into the holder, has its leading end urged to abut against the rear side of the reflector and slides in the holder in association with the inclination of the reflector, and graduations provided between the sliding rod and the holder. Flanges are formed on the holder by fixing them to the peripheral edge of the holding fitting hole with screws, whereas vertical walls are formed at the peripheral edge of the holder fitting hole of the lamp body. The vertical walls engage the respective flanges in the peripheral direction and surround the holders.

Abstract: A method for operating power window apparatus with a safety device which stops the closing operation of the window in response to the detection of an object-caught state, which prevents the incomplete close of the window, and can accurately detect the object-caught state. The opening/closing position of the window is detected by counting pulses generated as the window moves. A region where a safety control can be carried out is determined on the basis of the detected opening/closing position. When the window reaches a position near a position where the window is fully closed, the count indicative of the opening/closing position detector is reset. The resetting operation is carried out so that a time point where the relative speed of the window is reduced is set at the fully closed position of the window.

Abstract: A lighting device includes a lighting device body, a light source placed within the lighting device body, a lens mounted in the front opening of the lighting device body, and a hologram attached to at least one specific area on the lens. At least part of light emitted from the light source is refracted by the hologram and a holographic image recorded in the hologram 16 is reproduced. A desired pattern is recorded is recorded in the form of a holographic image in the hologram. Visual presentation and light distribution characteristics, like those a conventional lighting device having a pattern of lens steps physically formed in the lens surface, can be obtained without additional optical parts.

Abstract: A liquid crystal display device with an illuminator installed in the back of a liquid crystal display panel. The illuminator is made of a shallow box-form holder having a reflective inner surface, a plurality of LED's installed in at least one side wall of the holder, a light-diffusing plate installed between the liquid crystal display panel and the holder, and a printed circuit board mounted on the outer surface of the bottom of the holder. The LED's are of different light directional angles and inclined toward the bottom surface of the holder so that the light from the LED's can be reflected by the reflective bottom surface towards the display panel.

Abstract: A headlamp for motor vehicles in which an inner lens formed with distribution beam control steps can easily be fastened to the front opening of the reflector. Holes, which receive respective protrusions protruding from the lower edge of the inner lens, are formed in the lower surface of the reflector, and cutout portions provided on the front end of the upper surface of the reflector are located further rearward than the protrusions, whereby the inner lens maintains engagement with the front opening of the reflector lens contact faces by its own weight. The upper edge of the inner lens can easily be fastened to the front end of the upper surface.

Abstract: The xyz orthogonal coordinate system is set so that the x-axis coincides with the optical axis of a reflecting surface. A fundamental surface has a reference point on the x-axis and a reference parabola included in a plane inclined, in a generalized form, from the xy-plane and having a vertex on the origin of the coordinate system and a focus on the x-axis in the rear of the reference point. The fundamental surface is a collection of intersecting lines each obtained by cutting an imaginary paraboloid of revolution having an axis extending in parallel with a ray vector direction taken by a reflected ray after being emitted from the reference point and then reflected at a reflecting point on a parabola that is an orthogonal projection of the reference parabola onto the xy-plane, passing through the reflecting point, and having a focus at the reference point by a plane in parallel with the z-axis and including the ray vector.

Abstract: Disclosed is a lighting circuit for a vehicular discharge lamp which controls current limitation in accordance with the status of the discharge lamp to thereby suppress an increase in consumption current when a source voltage drops. In the lighting circuit, when a lighting switch 5 is set on, a battery voltage is boosted in a DC booster circuit and is converted into an AC voltage by a DC/AC converter before it is applied to a metal halide lamp. The DC booster circuit has a chopper structure having an inductor and a field effect transistor (FET). A control signal from a control circuit is sent to the FET. The control circuit has a V (voltage)-I (current) controller for controlling the lighting and a PWM (Pulse Width Modulation) controller. The lighting circuit further has a current compensator to prevent an excessive current from flowing through the FET at the beginning of the lighting or when the battery voltage drops.

Abstract: A vehicular headlamp that provides near-ultraviolet illumination of desired areas but which assures that sufficient brightness can be obtained in areas illuminated with visible light without having to combine the lamp with another type of headlamp. The headlamp includes a light-emitting unit accommodated in a lamp housing including a substantially parabolic reflector, a discharge bulb mounted inside the reflector to generate both visible light components and ultraviolet rays, and a light-emitting lens disposed in front of the reflector to irradiate the light reflected from the reflector in the forward direction.

Abstract: A push-on fixer for screw engagement in which a plurality of radially extending notches are formed in a circumferential edge region of a circular hole formed at a center portion of a thin discoid body, and a plurality of inner plate spring pieces are formed on the circumferential edge region of the circular hole so as to allow insertion of an aiming screw into the circular hole and so as to clamp the inserted aiming screw, is provided. An aiming screw is inserted into an aiming screw insertion hole of a lamp body of an automobile head lamp, and is retained so as to be prevented from coming out of the lamp body. A plurality of outer plate spring pieces which press against a push-on fixer abutment surface of the lamp body and a plurality of clamp release claws for releasing the clamping of the screw by the screw clamp plate spring pieces are formed on the outer circumferential edge of the thin discoid body.

Abstract: Disclosed are a printed circuit board which buries the leads of electronic parts mounted on a printed board into a coating material to prevent the occurrence of a leak between the leads, and an electronic part designed to suppress the occurrence of cracks in a coating layer formed by coating a coating material on the electronic part and a printed board after the former is mounted on the latter. The printed circuit board comprises a printed board, a frame provided on the soldering-surface side of the printed board to surround all or a part of the soldering surface of the printed board in such a way that the amount of protrusion of the frame from the soldering surface of the printed board is made larger than that of protrusion of the leads of the electronic parts from the soldering surface side of the printed board, and a coating material injected inside the frame to bury the leads that protrude from the printed board.

Abstract: In a variable-light-beam-pattern four-lamp type headlamp system with two lamps juxtaposed on each side of a vehicle and in which the two lamps are projection lamps with reflectors, the direction of the reflector of at least one of the two projection lamps is changed to deflect the output light beam thereof vertically and/or horizontally, and the two projection lamps are on-off controlled, with the one projection lamp being controlled in its distribution of light so that the output light beam of the two projection lamps are combined to provide a light distribution pattern, whereby formation of a dark region is prevented.