To make shutter speed higher inexpensively, and to drive a shutter blade in a form capable of easily correcting the lowering of an ambient light quantity on a picked-up image.
An upper shutter blade 3 and a lower shutter blade 5 are devised in terms of blade shape so that their portions 3o and 5o that cover the vicinity of the center of an aperture W start to shield the aperture W from light preceding to their portions 3c and 5c that cover the vicinities of four corners when shielding the aperture W from light, whereby their portions facing the aperture W travel reversely to each other in a direction perpendicular to long sides Wa of the aperture W opposed to each other in such a state that they are parallel with the long sides Wa of the aperture W. Besides, positions of blade supporting shafts 2ax1 and 2ax2 pivotally supporting the upper shutter blade 3 and the lower shutter blade 5 to be rotatable are devised.
JP2010256473 | DRIVING CHARACTERISTIC ADJUSTMENT MECHANISM |
JP2002369058 | ELECTRONIC CAMERA AND SHUTTER DRIVING CONTROL METHOD |
NISHIGORI HIDETOSHI
JP2006276763A | 2006-10-12 | |||
JPH09189935A | 1997-07-22 | |||
JP2006178366A | 2006-07-06 |
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