Patent ID: 7463798
Filing Date: 2008-12-09
Classification: G02B

Abstract:
1. A microelectromechanical systems device comprising: a substrate; a moving part, a fixed part, and an actuator that displaces said moving part, all of which being formed on said substrate; a control unit which drives said actuator to switch the position of moving part between binary states; vibration detecting means for detecting a micro vibration excited in said moving part in one of said binary switching states; a dynamic-characteristic analyzing means for analyzing a dynamic-characteristic of said moving part on the basis of an output from said vibration detecting means; a memory which stores data outputted from said dynamic-characteristic analyzing means; an operation unit which retrieves data from said memory, compares two temporally successive pieces of data, and calculates difference information between said two pieces of data; and a failure diagnosis unit which performs a failure diagnosis based on said difference information outputted from said operation unit.