Patent ID: 8368798
Filing Date: 2013-02-05
Classification: G02B,H04N

Abstract:
1. A vibrating device comprising: a dust-screening member which is shaped like a plate as a whole, and has at least one side that is symmetric with respect to a virtual axis on a surface of the plate-like member; a vibrating member adjacent to one side of the dust-screening member and arranged on the surface along the one side, and configured to produce, at the surface, vibration having a vibrational amplitude perpendicular to the surface of the dust-screening member; and a drive unit configured to drive the vibrating member to produce the vibration, such that peak ridges of the vibration having the vibrational amplitude perpendicular to the surface of the dust-screening member form a closed loop, and an area including a center of the closed loop is surrounded by a node area having almost no vibrational amplitude perpendicular to the surface of the dust-screening member, on the surface of the dust-screening member, wherein the dust-screening member has a virtual rectangle having the same area as the surface of the dust screening member, the vibrating member has a virtual rectangle having the same area as a surface of the vibrating member, and when a length of a side in the virtual rectangle of the dust-screening member corresponding to a short side of the virtual rectangle of the vibrating member is assumed to be LFw, and a length of a short side of the virtual rectangle of the vibrating member is assumed to be WE, WF/LFw has a dimension of 0.095 or greater and 0.105 or less.