Optical member driving device and projection display apparatus including the same
View Patent ↗An optical member driving device includes an optical member that light is incident on; and a plurality of actuators that shift different portions of an outer peripheral edge of the optical member in a traveling direction of the light immediately before the light is incidence. Each of the plurality of actuators includes an arm that rotates about a rotation center line extending in a direction perpendicular to the traveling direction and supports the optical member at a first end of the arm, a conductor that is provided at a second end of the arm and extends in a direction from the second end toward the first end, the conductor being where a current flows, and a magnet pair that is provided to sandwich the second end of the arm at an interval and generates a magnetic field in a direction intersecting with a direction where the conductor extends.
1. An optical member driving device comprising:
an optical member that light is incident on;
a plurality of actuators that shift different portions of an outer peripheral edge of the optical member in a traveling direction of the light immediately before the light is incident on the optical member,
wherein
each of the plurality of actuators includes
an arm that rotates about a rotation center line extending in a direction perpendicular to the traveling direction and supports the optical member at a first end of the arm,
a conductor that is provided at a second end of the arm and extends in a direction from the second end toward the first end of the arm, the conductor being where a current flows, and
at least one magnet pair that is provided to sandwich the second end of the arm at an interval and generates a magnetic field in a direction intersecting with a direction where the conductor extends, and
wherein the conductor is a coil.
2. The optical member driving device according to claim 1 , wherein
the coil includes a first linear portion extending with a directional component in the direction from the second end to the first end of the arm.
3. The optical member driving device according to claim 2 , wherein
the coil includes a second linear portion extending parallel to the first linear portion, and
the at least one magnet pair includes a first magnet pair that is provided to sandwich the first linear portion and generates a magnetic field in a direction intersecting with an extending direction of the first linear portion, and a second magnet pair that is provided to sandwich the second linear portion and generates a magnetic field in a direction opposite to the direction of the magnetic field of the first magnet pair.
4. The optical member driving device according to claim 1 , further comprising an elastic member that is connected to the first end of the arm and supports the optical member.
5. The optical member driving device according to claim 1 , wherein
the optical member has a circular shape as viewed in the traveling direction, and
the plurality of actuators are provided at intervals of 90 degrees as viewed in the traveling direction.
6. The optical member driving device according to claim 1 , wherein the optical member is parallel plate glass that light is transmitted through.
7. A projection display apparatus comprising:
a light source;
a light modulation element that converts light from the light source into image light;
the optical member driving device according to claim 1 that the image light from the light modulation element is incident on; and
a projection lens that projects the image light emitted from the optical member driving device.
8. An optical member driving device comprising:
an optical member that light is incident on;
a plurality of actuators that shift the optical member in a traveling direction of the light immediately prior to the light being incident on the optical member,
wherein
each of the plurality of actuators includes
an arm that rotates about a rotation center line extending in a direction perpendicular to the traveling direction and supports the optical member at a first end side of the arm, and
a coil that is provided at a second end side of the arm,
the coil includes a first linear portion extending with a directional component in the direction from the second end side to the first end side of the arm,
each of the plurality of actuators further includes at least one magnet pair that is provided to sandwich the second end side of the arm at an interval and generates a magnetic field in a direction intersecting with a direction where the coil extends,
the coil includes a second linear portion extending parallel to the first linear portion, and
the at least one magnet pair includes a first magnet pair that is provided to sandwich the first linear portion and generates a magnetic field in a direction intersecting with an extending direction of the first linear portion, and a second magnet pair that is provided to sandwich the second linear portion and generates a magnetic field in a direction opposite to the direction of the magnetic field of the first magnet pair.
9. An optical member driving device comprising:
an optical member that light is incident on;
a plurality of actuators that shift different portions of an outer peripheral edge of the optical member in a traveling direction of the light immediately prior to the light being incident on the optical member,
wherein
each of the plurality of actuators includes
an arm that rotates about a rotation center line extending in a direction intersecting with a direction including the traveling direction and supports the optical member at a first end side of the arm,
a conductor that is provided at a second end side of the arm, the conductor being where a current flows, and
a magnet that is provided at the second end side of the arm and generates a magnetic field in a direction intersecting with a direction where the conductor extends, and
wherein the conductor is a coil.
10. The optical member driving device according to claim 9 , wherein a winding axis of the coil is substantially parallel to an incidence surface of the optical member.
11. The optical member driving device according to claim 10 , wherein
the winding axis extends in a first direction,
the incidence surface is a surface that light is incident on, and
the incidence surface is on a plane defined by a second direction parallel to the first direction and a third direction intersecting with both the first and second directions.
12. The optical member driving device according to claim 10 , wherein
a plane intersecting with the winding axis is a plane defined by a direction in which the optical member is provided relative to the coil and the traveling direction of the light.
13. The optical member driving device according to claim 10 , wherein
a shape of the coil has a longitudinal direction and a transverse direction, and
the longitudinal direction is a direction intersecting with the traveling direction of the light.