Patent ID: 7576658

Claim:
A wiper control device for a vehicle with a wiper, said wiper control device comprising: a day/night detecting device for detecting whether the vehicle is in day-like conditions or night-like conditions; a moisture detection device that detects a quantity of moisture on the vehicle; and a controlling device that controls the wiping action of the wiper based on wiping sensitivity to the quantity of moisture detected by the moisture detection device, wherein the controlling device adjusts the wiping sensitivity between night-like wiping sensitivity and day-like wiping sensitivity, wherein the controlling device adjusts wiping sensitivity to night-like wiping sensitivity when the day/night detecting device detects night-like conditions, wherein the controlling device adjusts wiping sensitivity to day-like wiping sensitivity when the day/night detecting device detects day-like conditions, wherein the day-like wiping sensitivity is lower than the night-like wiping sensitivity, wherein wiping frequency increases with a rise in wiping sensitivity and decreases with a fall in wiping sensitivity, and wherein, when the day/night detecting device detects a change between day-like and night-like conditions, under at least some predetermined condition, the controlling device delays switching between night-like and day-like wiping sensitivity for a predetermined delay time.