摘要:
A vehicle has an eye level display for displaying information to the driver by means of images projected on to the windshield and reflected off it. The eye level display system includes means for correcting the image projected, in order substantially to eliminate multiple images. The projected image is corrected essentially by producing a corrected image, in the form of a digital matrix, before it is projected on the windshield by the projector. In one embodiment, the corrective processing step comprises inverting the matrix characteristic of the multiplication caused by the windshield. In another embodiment, it consists in producing a corrected image adaptively by minimising an error function below a predetermined threshold.
摘要:
The object of the invention is a light, for a motor vehicle, giving a cutoff beam, in particular of the fog type, having an optical axis and comprising a light source having a filament, the overall shape of which is substantially cylindrical and the axis of which is perfectly or substantially horizontal, the said filament extending obliquely or perpendicular to the optical axis of the light, and at least one reflector giving a reflected light beam with cutoff. The light comprises, in front of the light source, a lens determined so as to give a light beam with cutoff.
摘要:
The object of the invention is a dual-function lamp device for a motor vehicle, comprising in particular a light source emitting light signals towards an output surface of the lamp in order to produce a light beam, and a filtering means which can move between a passive position and an active position in which it allows passage of only some of the light signals corresponding to non-visible wavelengths, the filtering means being used in association with an intermediate lens for modifying the dispersion of the light beam. The driver thus has a direct illumination and an indirect illumination for obtaining, from a single lamp, two different fields of vision.
摘要:
The invention provides a system for detecting driving conditions on a road, mounted on a motor vehicle and comprising: at least one headlight having a first light source for emitting a visible light beam, and at least one light source which is capable of being modulated, in particular at high frequency, and which emits an infra red light beam towards the scene along the road in front of the vehicle, at least one video camera for taking images of that scene, at least one light sensor for receiving the infra red light beam reflected by the scene, and optical means for directing at least part of the reflected infra red beam towards the sensor.
摘要:
The invention proposes a motor-vehicle headlamp (10), of the type including a main optical system (23) which comprises, arranged from back to front overall along a main optical axis (A—A), a main light source (16), a main reflector (14) of the elliptical type, and a converging main lens (18), characterised in that it includes a secondary optical system (36) comprising: a secondary light source (48) which is arranged behind the main lens (18) and off the path of the light rays emitted by the main light source (16); and an optical distribution element (42) which is interposed between the secondary light source (48) and the exit surface (19) of the main lens (18), in such a way as to form, at the exit from the main lens (18), a secondary regulatory beam for indicating.
摘要:
The present invention relates to a headlight for a motor vehicle, comprising a first reflector (20, 20′) of elliptical shape, at a first focus (F1) of which is located a main light source (10), the light rays emitted by this source (10) and reflected by the elliptical reflector (20, 20′) being directed towards a concentration spot located at a second focus (F2) of the elliptical reflector (20, 20′), the first (F1) and second (F2) focuses of the elliptical reflector (20, 20′) defining a main optical axis (Oy) of the elliptical reflector (20, 20′), a convergent lens (30) being placed such that its optical axis is coincident with the main optical axis (Oy) of the elliptical reflector (20, 20′) and that the second focus (F2) of the reflector (20, 20′) is located on the focal line (LF) of the lens (30) in order to emit a light beam of rays parallel to the main optical axis (Oy). According to the present invention, the headlight comprises at least one optical system concentrating the light rays emitted by a second light source (60) in the direction of a second optical axis (O′y′) passing through the optical centre (C) of the lens (30) and over a second concentration spot located on the focal line (LF) of the lens (30), and in that the first (Oy) and second (O′y′) optical axes form an angle (&agr;) of between 20 et 45° between them.
摘要:
An elliptical projector for a motor vehicle comprises an ellipsoidal reflector co-operating with a light source mounted in a first focal region of the reflector, which forms, in a second focal region, a concentrated patch of light after reflection. The headlight also has a convergent lens which is focused in the vicinity of the second focal region so as to project this light patch on the road. The headlight further includes a mask in the path of the light between the light source and the lens. The mask is adapted to occult part of the light flowing between the reflector and the lens, and is disposed entirely above the second focal region of the reflector; the mask defines at least two occulting regions which are spaced apart in the direction of the optical axis; and each occulting region is arranged to mask a specific portion of the light. The invention is applicable, in particular, to the production of a main beam with a blurred, achromatic, cut-off at the bottom; this beam may be autonomous, or it may be complementary to a dipped or passing beam.
摘要:
A power supply circuit for a discharge lamp, in particular for a motor vehicle headlight, provides pulse starting. The circuit comprises a DC to AC converter giving an AC output at its secondary winding, together with a starting circuit which includes a transformer having a secondary winding in series with the discharge lamp. The apparatus further includes a branch which is connected in parallel with the secondary winding of the starter circuit transformer. At the frequency prevailing when an arc has been established in the discharge lamp, this branch has an impedance which is less than that of the secondary winding, so that the current then flows mainly in this branch.
摘要:
An indicator light for a motor vehicle includes a lamp, a reflector, a cover lens, and a screen placed between the lamp and the cover lens so as to mask the lamp. The reflector has a set of deflecting panels or facets, adjacent to each other and arranged to generate a plurality of secondary light sources visible within a given field of observation.Each deflecting panel comprises a central zone having a contour, projected orthogonally on the optical axis, which is generally rectangular with horizontal and vertical sides and adapted to cover the whole field of illumination, together with at least one pair of peripheral zones with oblique sides, smoothly extending the central zone on two opposed sides of the central zone. The peripheral zones together also cover the whole field of illumination. Each deflecting panel reveals at least two virtual light sources within a given field of observation, when viewed from any angle within that field. The screen is a translucent plate having retro-reflective optical means on one of its faces, and includes means for generating further secondary light sources, in a distribution similar to that of the secondary sources generated by the deflecting panels and visible in the same field of observation.