Patent ID: 7659918
Filing Date: 2010-02-09
Classification: B41J,G02B

Abstract:
1. A method of adjusting a parameter of a pivotally oscillating structure having a functional surface comprising the steps of: supporting a functional surface by a pair of torsional hinges extending between said functional surface and an anchor member such that said functional surface pivotally oscillates about said pair of torsional hinges; mounting said anchor member to a support structure; and adjusting the stress loading on said pair of torsional hinges to adjust a selected parameter of said pivotally oscillating structure; wherein said step of adjusting the stress loading comprises the step of mounting a piezoelectrical element separate from an oscillatory drive mechanism for the functional surface and dedicated to applying said one of tension and compression forces to said pair of torsional hinges by providing electrical signals to distort said piezoelectric element.