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.

Abstract: A discharge lamp apparatus in which an insulating base for supporting a lead support base end portion maintains its dielectric strength over long periods of use, and which is simple to assemble. A lead support acting as a current path is projectingly provided on a front surface of a synthetic-resin insulating base, which is a lamp holder, a front end portion of an arc tube, which is a discharge lamp body, is supported by the lead support, a rear end portion of the arc tube is fixedly supported in an engagement concave portion formed in the insulating base, and the lead support is covered with a ceramic insulating cylindrical body. In accordance with the invention, a base end portion of the insulating cylindrical body is integrated with the insulating base through insert molding.

Abstract: A reflecting surface consists of an inner surface and an outer surface, and a filament is disposed along the optical axis of the reflector. The inner surface produces a projection pattern extended in the horizontal direction. The upper half of the inner surface produces a projection pattern below the horizontal center line. Of the lower half of the inner surface, a subsection located on one side of the vertical center plane of the reflector produces a projection pattern contributing to formation of the inclined cutline, and the other subsection located on the other side of the vertical center plane produces a projection pattern contributing to formation of the horizontal cutline. The outer surface produces a projection pattern concentrated in a central area. The upper half of the outer surface produces a projection pattern below the horizontal center line.

Abstract: A mounting structure for a vanity mirror includes two screw penetration holes formed in a lamp section of the vanity mirror; positive and negative contacts for supplying a light source in the lamp section with electricity, the positive and negative contacts being formed with through holes and being disposed such that each of the through holes formed in the positive and negative contacts is aligned with a corresponding one of the screw penetration holes of the lamp section; two contacts provided on a sun visor and connected to a power source, the sun visor-side contacts being formed with through holes and being positioned such that each of the through holes of the sun visor-side contacts is aligned with a corresponding one of the screw holes in bosses of the sun visor which are located at positions corresponding to the screw penetration holes of the lamp section; and two mounting screws made of a conductive material which are passed through the through holes of the contacts of the lamp section, the screw penet

Abstract: Disclosed is a vehicular headlamp, which has a reflecting surface curved outward, a lens covering the front of the reflecting surface and a filament disposed at a predetermined position at the reflecting surface, whereby the light emitted from the filament is reflected at the reflecting surface to irradiate a low beam. This headlamp further has an auxiliary reflecting surface provided at a position out of the region which extends from the filament and covers the effective reflecting surface of the reflecting surface. The auxiliary reflecting surface is positioned substantially horizontal and substantially parallel to the irradiation direction. The vehicular headlamp with the above structure can therefore produce beams to illuminate overhead signs from the light reflected at the auxiliary reflecting surface while emitting no dazzling light to an approaching vehicle from the auxiliary reflecting surface. Further, this headlamp does not deteriorate the designability of the lens.

Abstract: A headlight for a motor vehicle incorporation devices for measuring the amount of deviation of the beam of light produced thereby from the desired axis. The first deviation measuring device, which is used for measuring the amount of deviation of the beam in the horizontal direction, includes a calibrated rod extending between either the reflector and the headlight body, in the case of a movable reflector type headlight, or between the vehicle body and the headlight body, in the case of a movable unit type headlight. The second deviation measuring device, which is used for measuring the amount of deviation in the vertical direction, includes a level secured to the reflector or headlight body.

Abstract: A glare sensor includes a light condensing means for condensing light beams from the fore scene and photo sensing element for sensing the light beams from the light condensing means. The photo sensing element is constructed with photodiodes. Blue filters are selectively coupled with the photodiodes. With provision of the blue filters, the glare sensor is able to discriminate red light from white light or yellow light. The output signals of the photodiodes with the blue filters and the photodiodes with no filters are used for detecting the direction and color of the light coming from the fore scene. With this, the glare sensor is capable of detecting forerunning cars, oppositely running cars and traffic lights.