| 摘要 |
PURPOSE:To obtain a stable picture without vibration by providing a control system comprising a control means applying drive control to a correction means in response to the output of a detection means so as to vary a block frequency of a notch filter. CONSTITUTION:At least two kinds of filter circuits 104 or more are provided and they are switched adaptively by a selector 105. Moreover, the gain of a variable gain amplifier 106 is adjusted so that the system is made stable against the selected circuit 104. The mode in use is selected by a mode selector switch 108, a CPU 109 generates a value programmed in advance to drive the selector 105 and the amplifier 106. An actuator motor 107 drives a variable apex angle prism 101 through a controller with a frequency characteristic and a gain different from each mode in response to the movement of the detected picture and the characteristic is fed back. Thus, a vibration component of a picture is suppressed in a monitor output e(t) and the picture whose vibration is corrected is outputted onto a monitor. |
