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Researchers Submit Patent Application, "Optical Module with Common Part Reference for Motor Vehicle Lighting And/Or Signalling", for Approval

September 3, 2014



By a News Reporter-Staff News Editor at Electronics Newsweekly -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventors Blandin, Jonathan (Les Pavillons Sous Bois, FR); Mornet, Eric (Nogent Sur Marne, FR); Perez, Magdalena (Martos, ES), filed on September 12, 2012, was made available online on August 21, 2014.

No assignee for this patent application has been made.

News editors obtained the following quote from the background information supplied by the inventors: "The technical field of the present invention is that of optical modules intended to produce a light beam in order to light a road taken by a vehicle bearing this optical module. Such an optical module is particularly applicable when it is installed inside a lighting and/or signaling device for a motor vehicle.

"It is known practice to produce a light function on a motor vehicle by focusing light rays emitted by a light source. The optical parts used to focus these light rays are, generally, installed between the light source, for example a xenon lamp, and an outer lens enclosing a headlight which receives this assembly.

"Such an optical part is an isotropic and transparent element, with at least one face which is not planar, so as to make the light converge or diverge.

"In the motor vehicle lighting sector, it is also known practice to use a light source of light-emitting diode type. This type of source is accompanied by a device for switching the source on or off, and these two elements give off heat that a cooling device is responsible for dissipating into the surrounding environment.

"An optical part of the prior art is mounted with an assembly consisting of a light-emitting diode and its cooling device by interposing a part which maintains a certain distance between the optical part and the assembly. This is generally a plastic support which is fastened on one side to the periphery of the optical part and on the other side to the assembly consisting of the light-emitting diode and its cooling device.

"The presence of this support comprises numerous drawbacks. Firstly, this support forms a part which has to be designed, manufactured and installed. This part thus represents a cost which puts a strain on the overall cost of the lighting function.

"Another drawback lies in the fact that this support is a distinct and intermediate part between the assembly targeted above and the optical part. Since the latter has to be installed according to a precise orientation relative to the assembly, it is then necessary to manage, on the one hand, very accurately, the chain of banks linking these components, and, on the other hand, to guarantee a minimal manufacturing tolerance of this intermediate support."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventors' summary information for this patent application: "The aim of the present invention is therefore to resolve the drawbacks described above mainly by directly referencing the optical part on the cooling device.

"The subject of the invention is therefore an optical module for a lighting and/or signaling device of a vehicle, comprising at least one light source capable of generating a light beam, one cooling device capable of dissipating heat and one device for focusing the light beam wherein the focusing device is borne directly by the cooling device.

"The function of the focusing device is to concentrate the light rays emitted by the source to direct them toward an area of the road to be lit. Such a focusing device is, for example, a lens, or even a multiplicity of lenses.

"According to a first feature of the invention, the cooling device comprises at least one first portion intended to pick up the heat and at least one second portion derived from said first portion, that is to say which emerges therefrom, and on which the focusing device rests.

"According to a second feature of the invention, the second portion comprises a cavity in which a protuberance of the focusing device is housed, said protuberance being delimited by at least two walls of a form complementing at least two faces delimiting the cavity.

"According to another feature of the invention, the module comprises at least one collector, or collector element comprising a plurality of collectors, capable of returning the light beam emitted by the light source at least toward the focusing device.

"According to yet another feature of the invention, a fastening means is provided for securely attaching the focusing device to the cooling device.

"According to yet another feature of the invention, the fastening means is a staple engaged both on the focusing device and on the cooling device.

"According to a variant of the invention, the fastening means for securely attaching the focusing device to the cooling device is made of the same material as the collector.

"Advantageously, the collector is securely attached to the cooling device by at least one secure attachment element, said secure attachment element being arranged to press the protuberance into the cavity.

"Also advantageously, the fastening means is formed by an arch with at least one flank in contact with a rim of the focusing device.

"According to one feature of the optical module, the fastening means comprises at least one deformable element.

"The optical module according to the invention comprises at least one printed circuit board directly in contact with the cooling device, said printed circuit board receiving said light source.

"The module also comprises at least one folding unit directly in contact with the cooling device.

"The invention also covers a lighting and/or signaling device for a motor vehicle comprising at least one optical module according to any one of the features presented above.

"Such a device is arranged to participate in the production of a code function of a motor vehicle.

"One prime advantage according to the invention lies in the elimination of a part in an optical module intended to be used on a motor vehicle. The cost of the lighting function implemented by the optical module according to the invention can thus be reduced.

"Another advantage lies in the increased reliability of the assembly of such a module. In practice, the chain of banks between the light source and the focusing device is reduced, which increases the level of accuracy and of reliability of the module according to the invention.

"These and other objects and advantages of the invention will be apparent from the following description, the accompanying drawings and the appended claims.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS

"Other features, details and advantages of the invention will become more clearly apparent on reading the description given below by way of indication in relation to the drawings in which:

"FIG. 1 is a perspective view of an optical module according to the invention;

"FIG. 2 is a detail and side view showing the relationship between the cooling device and the focusing device;

"FIG. 3 is a partial plan view showing a central linkage point between the cooling device and the focusing device;

"FIG. 4 is a detail and perspective view of the fastening means constituting the invention;

"FIG. 5 is a perspective view of the fastening means;

"FIG. 6 is an exploded view of the optical module represented in FIG. 1;

"FIG. 7 is a perspective view of a component of the optical module according to a first variant embodiment;

"FIG. 8 is a perspective view of the first variant of the optical module;

"FIG. 9 is a perspective view of a component of the optical module according to a second variant embodiment; and,

"FIG. 10 is a perspective view of the second variant of the optical module."

For additional information on this patent application, see: Blandin, Jonathan; Mornet, Eric; Perez, Magdalena. Optical Module with Common Part Reference for Motor Vehicle Lighting And/Or Signalling. Filed September 12, 2012 and posted August 21, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=3759&p=76&f=G&l=50&d=PG01&S1=20140814.PD.&OS=PD/20140814&RS=PD/20140814

Keywords for this news article include: Patents, Electronics, Circuit Board, Light-emitting Diode.

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Source: Electronics Newsweekly


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