lamp with switching device and control method thereof

摘要

A headlight includes a beam-type switching device (5) equipped with an electrical power limiting device (6). The power limiting device (6) can lower operational electrical power after a certain time interval has passed following initial application of operational electrical power to the switching device (5). The switching device (5) can include an electromagnetic solenoid (5) with a coil (5c). Sufficient electrical current can be applied to the switching device (5) for an initial period when electromagnetic solenoid (5) requires comparatively high operational electrical power, and an electrical power limiting device (6) can lower the electrical power applied to the switching device (5) after a short time period. The size and cost of the switching device (5) can be reduced, overheating can be avoided, and the longevity and reliability of the device (5) can be increased. <IMAGE>