Patent ID: 8032284

Claim:
A seat apparatus adapted to a vehicle and for controlling a side support portion of a seat on the basis of a road shape, the seat apparatus comprising: control means that cooperates with a car navigation system and for controlling the side support portion of the seat on the basis of electronic map data from the car navigation system; self-directed control means for controlling the side support portion of the seat on the basis of vehicle driving information; sensor error detecting means for detecting a sensor output error from the car navigation system; and map matching error detecting means for detecting that a map matching error occurs at the car navigation system, wherein, while the side support portion of the seat is controlled by the control means that cooperates with the car navigation system, when at least one of the sensor error detecting means and the map matching error detecting means detects at least one of the sensor output error and the map matching error, the side support portion of the seat controlled by the control means that cooperates with the car navigation system is changed to be controlled by the self-directed control means, and while the side support portion of the seat is controlled by the self-directed control means, when one of the sensor error detecting means and the map matching error detecting means does not detect the error, the side support portion of the seat controlled by the self-directed control means is changed to be controlled by the control means that cooperates with the car navigation system.