Vehicle seat and vehicle provided with vehicle seat

A vehicle seat provided with a seat cushion and a seat back, comprising:

• an ischial tuberosity support device configured to be driven to change a position of a part of the seat cushion corresponding to ischial tuberosities of a seated person;
• a sacrum/ilium support device configured to be driven to change a position of a part of the seat back corresponding to a sacrum and/or ilia of the seated person;
• a ninth thoracic vertebra support device configured to be driven to change a position of a part of the seat back corresponding to a ninth thoracic vertebra part of the seated person;
• and
• a control device configured to control driving of the ischial tuberosity support device, the sacrum/ilium support device, and the ninth thoracic vertebra support device,
• wherein the control device is configured to sequentially execute:
• an information acquisition step of acquiring physique information of the seated person;
• a decision step of deciding at least three parameters regarding respective driving amounts of the ischial tuberosity support device, the sacrum/ilium support device, and the ninth thoracic vertebra support device based on the physique information acquired in the information acquisition step to make each of the positions conform to a physique of the seated person;
• an output step of driving the ischial tuberosity support device, the sacrum/ilium support device, and the ninth thoracic vertebra support device based on the corresponding parameters,
• each of the seat cushion and the seat back includes a pad member and a skin member covering a surface of the pad member;
• each of the ischial tuberosity support device, the sacrum/ilium support device, and the ninth thoracic vertebra support device includes an air cell disposed between the skin member and the pad member, a sensor configured to acquire an internal pressure value of the air cell, and an air supply and exhaust device configured to supply and exhaust air to and from the air cell to make the internal pressure value a prescribed pressure value;
• the driving amount of each of the ischial tuberosity support device, the sacrum/ilium support device, and the ninth thoracic vertebra support device is the prescribed pressure value of the internal pressure value of the corresponding air cell;
• the physique information includes information regarding a height, a weight, a body type, and a seating posture of the seated person;
• and
• the control device acquires the information regarding the seating posture according to the internal pressure value acquired by the sensor of the air cell of each of the ischial tuberosity support device, the sacrum/ilium support device, and the ninth thoracic vertebra support device, and corrects the driving amount of each of the ischial tuberosity support device, the sacrum/ilium support device, and the ninth thoracic vertebra support device according to the corresponding internal pressure value acquired by the sensor.