Patent ID: 7502056
Filing Date: 2009-03-10
Classification: H04N

Abstract:
1. A movement signal generation apparatus which generates a signal representing a movement of an optical adjustment unit, comprising: an analog signal output section which outputs an analog signal in accordance with a position of the optical adjustment unit; and a digital signal generation section which generates two digital signals in accordance with a movement amount and a movement direction of the optical adjustment unit based on the analog signal, wherein each of the digital signals has pulse components of the number corresponding to the movement amount, wherein each of the digital signals is output as a pulse train in a uniform period regardless of a movement speed of the optical adjustment unit and the pulse components have a uniform pulse width, and wherein the digital signals are output in a period of the pulse train equal to 1/N of a synchronization period of a video signal taken with the optical adjustment unit, where N is a natural number.