Valeo Vision

Philippe Clavier

Jean-Marc Nicolai

Sylvain Yvon

Jean Marc Nicola&iuml;

An electrical supply device for a discharge lamp of a motor vehicle headlight that comprises: an electronic module for converting source electric current into supply electric current for the discharge lamp; a housing that encloses the electronic module and is produced from an electrically conductive material so as to form electromagnetic shielding; an electrical connection harness that is intended to electrically connect the electronic conversion module with the discharge lamp; an envelope produced from an electrically conductive material that surrounds the connection harness so as to form electromagnetic shielding; the housing and envelope being electrically connected to a common reference electrical potential (&#x2212;); wherein the housing and the envelope are connected in parallel to the common reference electrical potential (&#x2212;).

Electrical supply device for a discharge lamp comprising ballast shielding

The invention concerns an electronic module for converting electrical voltage that is intended to supply a light source, which comprises: a horizontal printed circuit card; at least one top connector fixed to the top face of the printed circuit card; an electromagnetic shielding jacket fixed to the connector; characterised in that the jacket comprises a bottom fixing lug that extends horizontally so as to be pressed on the top face of the printed circuit card, the connector being fixed to the card by means of the fixing lug.

Electronic module comprising a shielded connector fixed to an integrated circuit card by means of a lug for fixing the shielding

Ballast comprising input terminals receiving a DC voltage coming from a supply source on the vehicle, a chopping supply circuit functioning at a predetermined chopping frequency in order to supply as an output a voltage supplying the discharge lamp, and a filtering device disposed at the input and intended to reduce radio interference produced by the chopping supply circuit. The chopping supply circuit comprises at least one first filtering capacitor connected between the input terminals and a filtering choke connected in series between one of the input terminals and the chopping supply circuit. In accordance with the invention, the ballast comprises a filtering device which also comprises at least one second filtering capacitor in series with an additional choke. This second capacitor forms with the additional choke a resonance circuit situated between the input terminals and tuned to the chopping frequency.

Discharge-lamp ballast in particular for a vehicle headlight

The invention concerns a protection device for a chopping supply of the type comprising a voltage converter whose secondary is connected to a load such as a light source of the xenon lamp type, and whose primary is connected to an energy source and is controlled by a power switch possibly controlled by a control unit, characterised in that it comprises:

Protection device for a chopping supply and a vehicle lighting device

A connector for a motor vehicle discharge lamp has at least two electrical contacts for supplying the high tension and low tension electrodes of the lamp. In the absence of a lamp, when the connector is connected to a power supply module, arcing can occur within the connector. The connector includes means which impose a preferential path on the arcs other than a direct path between the contacts of the connector.

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Bobigny, France

Philippe Clavier