Optical device and image display device
AssigneeSeiko Epson Corporation
InventorYasushi Mizoguchi
Life of this patent
Estimating the term…
Abstract
An optical device includes a glass plate, a movable section that supports the glass plate, a shaft section that supports the movable section so as to be swingable around the swing axis, a support section that supports the shaft section, a permanent magnet that is provided in the movable section and is thinner than the glass plate, and a pair of coils that are disposed opposite to each other with the permanent magnet interposed therebetween. The movable section includes thin wall portions that are thinner than the glass plate. The permanent magnet is disposed in the thin wall portions. In side view, the surface of each of the coils on the permanent magnet side is located between both the main surfaces of the glass plate.
Claims16
An optical device, comprising:
- a plate-shaped optical section that has a light incidence surface on which light is incident;
- a movable section that supports the optical section;
- a shaft section that supports the movable section so as to be swingable around a swing axis;
- a support section that supports the shaft section;
- a permanent magnet that is provided in the movable section and has a smaller thickness than a thickness of the optical section;
- and
- a pair of coils that are disposed opposite to each other with the permanent magnet interposed therebetween and that generate a magnetic field to act on the permanent magnet,
- wherein the movable section includes a thin wall portion having a smaller thickness than the thickness of the optical section,
- the permanent magnet is disposed in the thin wall portion, and
- when seen from a direction perpendicular to a plate thickness direction of the optical section, a surface of each of the pair of coils facing the permanent magnet is located between a pair of main surfaces of the optical section.
Dependencies are inferred from the claim text.