Patent ID: 6759761
Filing Date: 2004-07-06
Classification: B60Q,H05B,Y02B

Abstract:
A device for automatically switching lighting devices in a vehicles, comprising,a sensor device (20) for detecting the light intensity in surroundings of the vehicle; at least one global sensor (22) provided in the sensor device for nondirectonally detecting the general light intensity in the surroundings of the vehicle; at least one directional sensor (24) provided in the at least one global sensor for directionally detecting the light intensity at least approximately in the travel direction (14) of the vehicle; an evaluation device (30) for comparing the current signals (S1, S2) of the sensors (22, 24) of the sensor device (20) with threshold values (SE), wherein if at least one of the threshold values (SE) is undershot, the lighting devices (10, 12) are switched on, wherein at least indirectly, the current temperature of the sensor device (20) is detected and a signal (ST) pertaining to the current temperature is delivered to the evaluation device (30) a memory, wherein in the evaluation device (30), temperature-dependent basic signals (S10, S20) of the sensors (22, 24) of the sensor device (20) are stored in the memory without incidence of light, and wherein by means of the evaluation device (30), a correction of the current signals (S1, S2) of the sensors (22, 24) of the sensor device (20) and/or of the threshold values (SE) is effected in accordance with the basic signals (S10, S20).