Device for adjusting brightness and darkness of glass used in windshield of motor vehicle, has control apparatus to control voltage applied to filter sheet of glass, based on signal strength regarding light ray of filter sheet

摘要

The device has a sensor (10) that senses a light ray of an electro-chromic filter sheet (12) of the vehicle glass and outputs a signal corresponding to the sensed light ray, when a voltage is applied to the filter sheet by a power supply. A control apparatus (11) transmits a control signal to the power supply when the outputted signal strength exceeds a predetermined value, so as to change the brightness and darkness of the glass.