A vehicle seat is provided. The vehicle seat comprises at least one backrest which is pivotally mounted relative to a seating surface of the vehicle seat; a backrest adjusting mechanism and a drive for pivoting the backrest; and at least one headrest on the backrest, which by means of a headrest adjusting mechanism is adjustable in its height relative to the backrest at least along a direction of longitudinal extension of the backrest. It is provided that beside the backrest adjusting mechanism the drive is coupled with the headrest adjusting mechanism, in order to simultaneously transmit an adjustment force to the headrest adjusting mechanism when the backrest is pivoted in at least one backrest adjustment direction. In addition, there is proposed a backrest module with a drive which beside a backrest adjusting mechanism is coupled with a headrest adjusting mechanism.

A vehicle headrest height adjustment system includes a vehicle seat having a seat back, a seat base and a headrest. A sensing device generates a signal when the vehicle seat is unoccupied by an occupant. A headrest displacement mechanism is connected to the headrest and reversibly displaces the headrest between a headrest extended position and a headrest retracted position. The headrest displacement mechanism lowers the headrest to the headrest retracted position when the signal is received from the sensing device that the vehicle seat is unoccupied by the occupant defined when the occupant is not present.

A vehicle headrest height adjustment system includes a vehicle seat having a seat back, a seat base and a headrest. A sensing device generates a signal when the vehicle seat is unoccupied by an occupant. A headrest displacement mechanism is connected to the headrest and reversibly displaces the headrest between a headrest extended position and a headrest retracted position. The headrest displacement mechanism lowers the headrest to the headrest retracted position when the signal is received from the sensing device that the vehicle seat is unoccupied by the occupant defined when the occupant is not present.