Abstract: A wiper control device includes an acquisition unit and an estimation unit. The estimation unit is configured to acquire a value related to a current flowing through a wiper motor that drives a wiper configured to reciprocate between a first position and a second position. The estimation unit is configured to estimate a wiper angle, which is a rotation angle of the wiper, based on a current ripple in the current flowing through the wiper motor. The current ripple has a periodicity corresponding to driving of the wiper motor.

Abstract: A wiper control device includes an acquisition unit and an estimation unit. The estimation unit is configured to acquire a value related to a current flowing through a wiper motor that drives a wiper configured to reciprocate between a first position and a second position. The estimation unit is configured to estimate a wiper angle, which is a rotation angle of the wiper, based on a current ripple in the current flowing through the wiper motor. The current ripple has a periodicity corresponding to driving of the wiper motor.

Abstract: A wiper control device includes an acquisition unit, an estimation unit, and a drive unit. The acquisition unit is configured to acquire a value related to a current flowing through a wiper motor that drives a wiper configured to reciprocate between a first position and a second position. The estimation unit is configured to estimate a wiper angle, which is a rotation angle of the wiper, based on a current ripple in the current flowing through the wiper motor. The current ripple has a periodicity corresponding to driving of the wiper motor. The drive unit is configured to reduce an electric power supplied to the wiper motor when a position of the wiper is just before the first position or when the position of the wiper is just before the second position.

Abstract: A wiper device includes a wiper arm that includes a recess and that is swung due to rotation of a wiper motor, the wiper arm causes a wiper blade coupled to a leading end portion of the wiper arm to perform a wiping operation across a surface of a windshield glass, an acceleration sensor that is installed in the recess of the wiper arm, a drive circuit that generates a voltage to be applied to the wiper motor, and a control circuit that controls the drive circuit such that a voltage to reduce a change in acceleration of the wiper arm, detected by the acceleration sensor, is applied to the wiper motor.