SMART LIGHTING DEVICE FOR VEHICLE

摘要

A smart lighting device for vehicle is disclosed and comprises a light body, a light collection unit, a lightening unit, and light focusing glass. An output current of the pulse-width modulation unit is zero while the light collection unit is collecting the ambient light brightness, even the lightening unit is not lightened, so that there is not any light brightness in the light body and then the ambient light brightness of the light projection area is accurately detected while the light collection unit is collecting the ambient light brightness of the light projection area.

主权项

1. An intelligent lighting device for vehicle, comprising a light body, a light collection unit, a lightening unit, and light focusing glass, wherein:
the light collection unit is a photosensitive semiconductor, a concave reflection cup with an open end is arranged at a front end of the light body, the light focusing glass is arranged at the open end of the cup, the lightening unit is arranged at an inner wall of a rear end of the cup opposite to the open end, the light collection unit is arranged at the reflection cup, a light projection area disposed at the front end of the light body is defined by cooperating with the lightening unit and the light focusing glass, and the light collection unit is faced to the light projection area and detects an ambient light brightness of the light projection area; a micro control unit and a pulse-width modulation unit are further arranged at the light collection unit and electrically connected with one another, a difference of the ambient light brightness comparing with a digital information received from the light collection unit and a predetermined ambient light brightness by the micro control unit is calculated and then the digital information is commanded to transmit to the pulse-width modulation unit and modulate to increase or decrease the light brightness of the lightening unit corresponding to the light projection area; and an output current of the pulse-width modulation unit after a duty cycle is zero while the light collection unit is collecting the ambient light brightness, even the lightening unit is not lightened, so that there is not any light brightness in the light body and then the ambient light brightness of the light projection area is accurately detected while the light collection unit is collecting the ambient light brightness of the light projection area.