The influence of electron injection from the metal electrode into organic liquid crystal dipolar film on the effective anchoring energy (EAE) of the polar organic film is discussed from the energy point of view. It is shown that the accounting for the injected carrier in organic film results in a polynomial function for the EAE expanded up to the fourth order in cos theta(s), where theta(s) is the polar angle of the director (n) over cap at the film/metal interface. It is also shown that in a certain range of the location of centroid of the injected carrier (z) over bar the destabilizing surface polarization mechanism may lead to destruction of the linear anchoring strength coefficient w(1). The strong influence of (z) over bar on the quadratic term w(2) also has been demonstrated. (c) 2007 Elsevier B.V. All rights reserved.