Lexus LF-A Concept Screensaver - Version 1 Lexus LF-A Concept Screensaver. The Lexus LF line is a series of concept cars built by Lexus, the luxury vehicle division of Toyota Motor Corporation. The "LF" stands for L-finesse, a new design direction by Lexus. The new design language of L-finesse was first introduced on the LF Series concepts and has now extended to all new vehicles in the Lexus lineup.