| 摘要 |
<p>PURPOSE:To enhance the safety of driving by automatically controlling the light volume of a head lamp during nighttime driving so as to reduce the burden on the driver due to switching of the head lamp. CONSTITUTION:A light receiving element C is incorporated in a light receiving part C1 installed in the front part of an automobile, and switching can be made by a relay R through the intermediary of a circuit in which semiconductors such as an IC 1 and a transistor T are connected.</p> |
