The patent's inventor is Smajser, Petr (Novy Jicin, CZ).
This patent was filed on
From the background information supplied by the inventors, news correspondents obtained the following quote: "The invention relates to an adaptive light projector system for motor vehicle headlights, which by changing the position and profile of a diaphragm inside the light projector system bring about changes in the spatial distribution of light in front of the driver of the vehicle.
"To improve the safety of highway traffic, a refinement is being made in the lighting produced by the headlights of motor vehicles. The new rule of the European Economic Commission ECE R123 makes it possible to use completely new types of light in certain situations, such as motorway beams, town lights, rain lights, etc.
"Multifunctional mechanisms for the projector unit are in development, preparation for production, and production, making it possible to achieve these different types of lighting from a single source. These changes in the type of lighting are for the most part accomplished by a turning, a shifting, or a change in the trimming diaphragm of the light beam.
"Examples of such a solution are the patents Hella 'Varilis' (DE 102 16 678, DE 199 09 413 or EP 1 052 446 A2),
"The major drawbacks of these layouts are their considerable complexity, expense, and slow operation."
Supplementing the background information on this patent, VerticalNews reporters also obtained the inventor's summary information for this patent: "The aforementioned drawbacks have been eliminated by the design of a simple adaptive projection system for the headlights of motor vehicles with a direct drive from a step motor, or a d.c. motor with transmission.
"The adaptive projection system for the headlights of motor vehicles comprises a reflector, a light source, a lens and a diaphragm system consisting of a fixed and a movable part and a mechanism for providing a change in the position of the movable part of the diaphragm system by turning of the diaphragm to achieve different types of light beams. The movable part of the diaphragm system is a thin-wall optical diaphragm generally in the shape of a hyperboloid, which also includes the specific designs in the shape of a cylinder or cone, which is firmly attached to the shaft of a motor, this attachment of the optical diaphragm being made firm by means of stanchions on both sides of the motor. The optical diaphragm then turns around the motor in its movement.
"To screen out unwanted light beneath the diaphragm cap, the fixed part of the diaphragm system is used, namely, a front and rear screening wall. The front and rear screening wall effectively screen out stray light getting beneath the optical diaphragm from all directions.
"The purpose of this invention is to create a complex, yet simple, and extremely reliable mechanism of this kind that allows changes in the spatial distribution of light being output.
"Thus, the subject of this invention is an adaptive projection system for the headlights of motor vehicles, consisting of a reflector with light source, a diaphragm system having an optical diaphragm and an diaphragm cap, a lens and a mechanism for producing a change in the position of the optical diaphragm for different types of lighting, and an electric motor for driving this mechanism. The optical diaphragm--a thin-wall concave shell in the shape of a hyperboloid, including the possibility of a cylindrical or conical sector--is firmly fastened at both sides by means of stanchions to the output shaft 20 of the electric motor, which is placed in a central position relative to the mechanism and rotates in a half-circle around it, while the axis of rotation in the basic design is generally spatially deviating from the transverse axis of the projector and the optical diaphragm is fixed in various defined positions of its rotation, while the shaft of the motor together with both stanchions and the optical diaphragm form a rigid frame, enhancing the robustness of the structure, and it is thus possible to use a standard motor with ordinary (small) diameter of output shaft 20 without any modifications.
"The motor, which is in a central position thanks to the attachment of the optical diaphragm by the stanchions on either side of the motor, can be modified, as opposed to the symmetrical design, for better stopping ability by shifting the motor past the axis of symmetry 22 on the margin of the diaphragm cap 24 outside of the projecting part (per FIG. 3) and turned in a half-circle so that the axis of rotation deviates from the horizontal, while the shape of the optical diaphragm changes from cylindrical to conical or hyperboloid, as the axis of rotation is turned in another plane.
"The optical diaphragm advantageously has the shape of a sector with angle less than 180.degree. in cross section and the maximum travel while the diaphragm turns is likewise less than 180.degree. and therefore a free angle remains for securing the motor relative to the reflector of the projector by means of a lug.
"For driving the basic symmetrical variant of the mechanism per FIG. 2 with horizontal axis of rotation, it is advantageous from the standpoint of spatial structure to use a motor with integrated transmission, and the axis of rotation of the output shaft 20 is not identical with the axis of rotation of the motor itself.
"The individual optical cuts on the optical diaphragm are advantageously adapted to the limited useful travel and the position for the distance light is situated at one of the two end positions.
"Attachment of the electric motor to the frame is advantageously done by means of a relatively narrow, but strong and rigid lug, which limits the deviation of the turning of the diaphragm cap and prevents the diaphragm cap from turning in a full revolution.
"Further scope of applicability of the present invention will become apparent from the following detailed description, claims, and drawings. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art."
For the URL and additional information on this patent, see: Smajser, Petr. Adaptive Projector System for Motor Vehicle Headlights. U.S. Patent Number 8646954, filed
Keywords for this news article include: Legal Issues, Varroc Lighting Systems S.R.O.
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