Back to results
US 7,621,664 B2Granted
Lighting and/or signaling device for a motor vehicle incorporating a material having thermal anisotropy
AssigneeValeo Vison
InventorJean-Marc Nicolai
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeValeo Vison
InventorJean-Marc Nicolai
Estimating the term…
The device comprises at least one power light emitting diode light source and other means able to constitute one or more heat sources of such a nature as to affect the thermal environment of the light emitting diode light source. In accordance with the invention, the device also comprises a support piece formed at least partially from a material based on anisotropic graphite supporting the light emitting diode light source and opposing an effect of the other means on the thermal environment of the light emitting diode light source. According to other characteristics, the support piece comprises at least one thermal dissipation heat sink and the device can comprise a fan able to force a circulation of air through the heat sink.
A lighting and/or signaling device for a motor vehicle comprising at least one power light emitting diode light source and at least one other light source of heat, comprising a support piece at least partially formed from a material comprising an anisotropic graphite, said support piece comprising a first surface for supporting said power light emitting diode light source and a second surface for separating said power light emitting diode light source from said at least one other light source of heat to oppose an effect of heat from said at least one other light source of heat on a thermal environment of said at least one power light emitting diode light source, each of said first surface and said second surface comprising anisotropic properties that facilitate transferring heat away from each of said at least one power light emitting diode light source and said at least one other light source of heat;
A lighting and/or signaling device for a motor vehicle comprising at least one power light emitting diode light source and at least one other light source of heat, comprising a support piece at least partially formed from a material comprising an anisotropic graphite, said support piece comprising a first surface for supporting said rower light emitting diode light source and a second surface for separating said rower light emitting diode light source from said at least one other light source of heat to oppose an effect of heat from said at least one other light source of heat on a thermal environment of said at least one rower light emitting diode light source, each of said first surface and said second surface comprising anisotropic properties that facilitate transferring heat away from each of said at least one rower light emitting diode light source and said at least one other light source of heat;
A lighting and/or signaling device for a motor vehicle comprising at least one rower light emitting diode light source and at least one other light source of heat, comprising a support piece at least partially formed from a material comprising an anisotropic graphite, said support piece comprising a first surface for supporting said rower light emitting diode light source and a second surface for separating said rower light emitting diode light source from said at least one other light source of heat to oppose an effect of heat from said at least one other light source of heat on a thermal environment of said at least one rower light emitting diode light source, each of said first surface and said second surface comprising anisotropic properties that facilitate transferring heat away from each of said at least one rower light emitting diode light source and said at least one other light source of heat;
A lighting and/or signaling device for a motor vehicle comprising:
Dependencies are inferred from the claim text.
From the US filing history. Foreign family members aren’t listed.
Characterised by passive heat-dissipating elements, e.g. heat-sinks: with fins or blades
Spatial arrangement: of several lamps in relation to each other
Automatically: due to vehicle inclination, e.g. due to load distribution
Having dimming means: dimming circuits
About 2 months of term left · ends 26 Dec 2026 (estimated)
1. Field of the Invention
The invention concerns in general terms lighting and/or signaling devices intended to be mounted in motor vehicles. More particularly, the invention concerns lighting and/or signaling devices for a motor vehicle comprising at least one power light emitting diode light source and other means able to constitute one or more heat sources of such a nature as to affect the thermal environment of the power light emitting diode light source.
2. Description of the Related Art
FIG. 1 is an overall front view of a headlight according to the invention comprising a power light emitting diode lighting module;
FIG. 2 is a partial view in vertical section of the power light emitting diode lighting module included in the headlight in FIG. 1;
FIG. 3 is a partial perspective view of a support piece made from anisotropic graphite included in the headlight in FIG. 1, as a portion of the piece supporting a power light emitting diode; and
With reference essentially to FIGS. 1 to 3, a description is now given of a first particular embodiment, designated overall 1, of a lighting and/or signaling device such as a headlight according to the invention.
In this particular embodiment, the headlight 1 comprises light sources of various types, namely power light emitting diodes and incandescent lamps. These various light sources are included in lighting and signaling modules 10 to 16 of the headlight 1, modules that will be shown in front view in FIG. 1.
In this example, the lighting module 10 is a dipped/main beam lighting module comprising nine power LED diodes emitting a white light.