Patent ID: 8355883
Filing Date: 2013-01-15
Classification: B81B,B81C,G01R,G02B,G09G

Abstract:
1. A method of measuring a margin for an electromechanical device, the device comprising an array of elements, the method comprising: initializing the elements of the array to a first state; applying a positive hold voltage to a first portion of the array; applying a negative hold voltage to a second portion of the array; while applying the positive and negative hold voltages, applying a test pulse to the elements of the array; applying a negative voltage transition to the first portion of the array to apply the negative hold voltage to the first portion of the array; applying a positive voltage transition to the second portion of the array to apply the positive hold voltage to the second portion of the array; sensing a difference between charge induced by the positive voltage transition and charge induced by the negative voltage transition to determine whether the test pulse changed the state of one or more elements of the array; and determining the margin based on whether the test pulse changed the state of one or more elements of the array.