| 摘要 |
PURPOSE:To prevent the glare of the direct rays of the sun during operation by permitting the automatic turn of a sun visor through the detection of solar radiation. CONSTITUTION:When the pohtodiode 151 of a solar radiation sensor receives the direct rays of the sun, the direct rays are amplified by an amplifying circuit 21, and a direct-ray detecting circuit 22 judges the receiving of the direct rays, and a signal is input into an AND gate 25. Since an operation detecting limit switch 10 is in OFF state at this time, the signal is input into the other edge of the AND gate 25. Then, a motor driving circuit 24 operates, and a sun visor is turned. When the photodiode 151 of the solar radiation sensor does not receive the direct rays, the output of the direct-ray detecting circuit 22 becomes zero, and a motor 3 turns reversely, and the sun visor is housed. |
