ELECTROPHORETIC LIGHT QUANTITY CONTROL ELEMENT, ITS DRIVING METHOD AND DEVICE USING THE ELEMENT

摘要

PROBLEM TO BE SOLVED: To provide an electrophoretic light quantity control element which is used for a light quantity control device of an image pickup device by obtaining a physical shutter instead of a mechanical shutter by using an electrophoretic element. SOLUTION: The electrophoretic element including opaque electrophoretic particles is formed and put onto the optical axis of a lens or an imaging device, then a function for electrically controlling light quantity entering into the imaging device or the like is obtained by using the light shielding effect of the particles, thereby obtaining the image pickup device having large dynamic range. COPYRIGHT: (C)2004,JPO