US 2010/0165186 A1 · VIBRATING DEVICE AND IMAGE EQUIPMENT HAVING THE SAME

Abstract

A vibrating device includes 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 symmetry axis, and a vibrating member secured to the dust-screening member and configured to produce, at the dust-screening member, vibration having a vibrational amplitude perpendicular to a surface of the dust-screening member. The vibrating device further includes a drive unit configured to drive the vibrating member to produce vibration Z(x, y) at the dust-screening member, the vibration being expressed as follows: Z(x,y)=Wmn(x,y)·cos(γ)+Wnm(x,y)·sin(γ) where Z(x, y) is vibration at a given point P(x, y) on the dust-screening member, m and n are positive integers including 0, indicating the order of natural vibration corresponding to a vibrational mode, W mn  ( x , y ) = sin  ( n   π · x + π 2 ) · sin  ( m   π · y + π 2 ) ,  W nm  ( x , y ) = sin  ( m   π · x + π 2 ) · sin  ( n   π · y + π 2 ) ,  and γ is +π/4 or ranges from −π/8 to −π/4.

Claims14

Dependent claims

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 symmetry axis;
a vibrating member secured to the dust-screening member and configured to produce, at the dust-screening member, vibration having a vibrational amplitude perpendicular to a surface of the dust-screening member;
and
a drive unit configured to drive the vibrating member to produce vibration Z(x, y) at the dust-screening member, the vibration being expressed as follows:
Z(x,y)=Wmn(x,y)·cos(γ)+Wnm(x,y)·sin(γ)
where Z(x, y) is vibration at a given point P(x, y) on the dust-screening member;
m and n are positive integers including 0, indicating the order of natural vibration corresponding to a vibrational mode;
W
mn

(
x
,
y
)
=
sin

(
n


π
·
x
+
π
2
)
·
sin

(
m


π
·
y
+
π
2
)
;
W
nm

(
x
,
y
)
=
sin

(
m


π
·
x
+
π
2
)
·
sin

(
n


π
·
y
+
π
2
)
;

and
γ is +π/4 or ranges from −π/8 to −π/4.

81 more elements

An image equipment comprising:

an image forming element having an image surface on which an optical image is formed;
a dust-screening member which is shaped like a plate as a whole, has at least one side that is symmetric with respect to a symmetry axis, and has a light-transmitting region flaring in a radial direction from the center, facing the image surface and spaced therefrom by a predetermined distance;
a vibrating member configured to produce vibration having an amplitude perpendicular to a surface of the dust-screening member, the vibrating member being provided on the dust-screening member, outside the light-transmitting region through which a light beam forming an optical image on the image surface passes;
a sealing structure configured to surround the image forming element and the dust-screening member, thereby providing a closed space in which the image forming element and the dust-screening member that face each other;
and
a drive unit configured to drive the vibrating member to produce vibration Z(x, y) at the dust-screening member, the vibration being expressed as follows:
Z(x,y)=Wmn(x,y)·cos(γ)+Wnm(x,y)·sin(γ)
where Z(x, y) is vibration at a given point P(x, y) on the dust-screening member;
m and n are positive integers including 0, indicating the order of natural vibration corresponding to a vibrational mode;
W
mn

(
x
,
y
)
=
sin

(
n


π
·
x
+
π
2
)
·
sin

(
m


π
·
y
+
π
2
)
;
W
nm

(
x
,
y
)
=
sin

(
m


π
·
x
+
π
2
)
·
sin

(
n


π
·
y
+
π
2
)
;

and
γ is +π/4 or ranges from −π/8 to −π/4.

83 more elements

Dependencies are inferred from the claim text.

Vibrating device and image equipment having the same

Life of this patent

Vibrating device and image equipment having the same

Life of this patent

Abstract

Claims14