Headlamp i.e. H4 retrofit lamp, for use as e.g. gas-discharge lamp, in motor vehicle, has lamp base and light emission predefined by international standards with respect to distance and position in relation to reference plane of base

摘要

The headlamp (5) has a lamp base (10) and light emission which is predefined by international standards with respect to distance and position in relation to a reference plane (11) of the base, where the light is emitted by a set of semiconductor light sources (21) e.g. multi-chip LEDs. Control electronics (75) or a part of the control electronics is arranged in the base for controlling the semiconductor light sources. A supporting structure (3) with the semiconductor light sources is surrounded by a protecting bulb (6), which is a transparent plastic or a glass, filled with a gas.