(Both ailerons could also be raised, which would give you spoilerons.)
The pilot still has separate controls for ailerons and flaps at his disposal. A mixer is used to combine the separate pilot input into this single set of control surfaces called flaperons. The use of flaperons instead of separate ailerons and flaps can reduce the weight of an aircraft. The complexity is transferred from having a double set of control surfaces (flaps & ailerons) to the mixer.
Many designs that incorporate flaperons mount the control surfaces away from the wing so as to provide undisturbed airflow at high angles of attack or low airspeeds.
Flaperons are sometimes referred to as "Junker Flaperons".
Researchers Submit Patent Application, "High Performance Tilt Rotor Aircraft in Which Nacelle Tilt Angle and Flaperon Angle Mechanically Interwork with Each Other", for Approval
Feb 21, 2013; By a News Reporter-Staff News Editor at Politics & Government Week -- From Washington, D.C., VerticalNews journalists report that...
US Patent Issued to Korea Aerospace Research Institute on Oct. 1 for "High Performance Tilt Rotor Aircraft in Which Nacelle Tilt Angle and Flaperon Angle Mechanically Interwork with Each Other" (South Korean Inventors)
Oct 01, 2013; ALEXANDRIA, Va., Oct. 1 -- United States Patent no. 8,544,787, issued on Oct. 1, was assigned to Korea Aerospace Research...