Light source
AssigneeKoninklijke Philips Electronics N.V.
InventorsGerlach Corne Pieter Maria Emmen, Theodorus Maria Hendriks
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Abstract
A light source comprises a discharge lamp (LA), a bridge circuit for driving the discharge lamp and a reflector (RE). The bridge circuit comprises a capacitor (C1) coupled between a lamp connection terminal (T3, T4) and an input terminal of the bridge circuit (T1). EMI caused by the discharge lamp is suppressed by connecting a further capacitor (C2) between the lamp connection terminal and the reflector, so that a conductive path exists between the reflector and the bridge input terminal formed by both capacitors.
Claims6
A light source comprising
- a discharge lamp,
- a reflector,
- a lamp driver circuit for generating lamp current out of a DC supply voltage, equipped with
- first and second input terminals for coupling to the poles of a supply voltage source,
- first and second lamp connection terminals,
- a first chain connecting the first lamp connection terminal to the first input terminal and comprising a first capacitor, characterized in that the light source comprises a second chain connecting the reflector and the first lamp connection terminal.
A comprising lamp driver-reflector combination,
- a reflector,
- a lamp driver circuit for generating lamp current out of a DC supply voltage, equipped with
- first and second input terminals for coupling to the poles of a supply voltage source,
- first and second lamp connection terminals,
- a first chain connecting the first lamp connection terminal to the first input terminal and comprising a first capacitor,
- characterized in that the light source comprises a second chain connecting the reflector and the first lamp connection terminal.
Dependencies are inferred from the claim text.