Patent ID: 7239231
Filing Date: 2007-07-03
Classification: B60Q

Abstract:
1. A light control device for a vehicle, comprising: an upper side illuminance sensor for detecting an illuminance at an upper side of the vehicle; a control portion which determines whether the illuminance detected by the upper side illuminance sensor reaches a preset first reference illuminance, and performs a turning on or off control of a light of the vehicle based on a determined result; and an environment change detecting means for detecting a predetermined external environment change of the vehicle, the environment change detecting means connected to the control portion to send an external environment change signal to the control portion when the environment change detecting means detects the predetermined external environment change, wherein when the control portion receives the external environment change signal from the environment change detecting means, the control portion uses a second reference illuminance higher than the first reference illuminance, instead of the first reference illuminance, and performs the turning on or off control by comparing the illuminance detected by the upper side illuminance sensor with the second reference illuminance, the environment condition detecting means includes a tunnel detecting means for detecting a tunnel, and when the control portion receives a tunnel detection signal from the tunnel detecting means, the control portion performs the turning on or off control by comparing the illuminance detected by the upper side illuminance sensor with a tunnel reference illuminance used as the second reference illuminance.