| 摘要 |
PROBLEM TO BE SOLVED: To provide a raindrop amount detection device suitable for a wiper control device, the wiper control device using the same, and a headlight control device. SOLUTION: An image sensor 36 receives near-infrared light from a light emitting means 35, reflected by an indoor surface Wb of a windshield W by a first light receiving part 38 covered with a filter 37 for blocking visible light and transmitting infrared light, outputs each first light quantity signal to an MPU 34 based on the quantity of the light, receives transmitted light transmitted through the windshield W by a second light receiving part 39, and outputs each second light quantity signal to the MPU 34 based on the quantity of the transmitted light. The MPU 34 outputs a raindrop amount signal which is a signal showing a raindrop amount corresponding to each first light quantity signal output from the first light receiving part 38 of the image sensor 36, and outputs an outside world light quantity signal which is a signal showing the brightness of the outside world corresponding to each second light quantity signal output from the second light receiving part 39 of the image sensor 36. COPYRIGHT: (C)2009,JPO&INPIT
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