Seat assembly having an adjustable head restraint

A seat assembly, comprising:

• a seat back;
• a head restraint assembly, disposed on the seat back;
• a head restraint adjustment assembly, connected to the head restraint assembly and configured to adjust the head restraint assembly;
• a sensor attached to the seat assembly, configured to detect an occupant when present;
• and
• a controller in communication with the sensor, configured to:
• determine a size and a spatial location of the occupant when present, wherein the spatial location of the occupant is determined based on computing triangulated locations of at least two body organs of the occupant, and
• send an adjustment signal to the head restraint adjustment assembly to move the head restraint assembly towards an in-use position when the occupant is present, and move the head restraint assembly towards a non-use position when the occupant is absent.

A method comprising:

• detecting an occupant when present in the seat using a sensor;
• determining a size and a spatial location of the occupant using the sensor, wherein the spatial location of the occupant is determined based on computing triangulated locations of at least two body organs of the occupant;
• and
• adjusting a head restraint that is adjustably coupled to a seat back of a seat in response to the determined size and the determined spatial location.