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US 2010/0141366 A1Published application
Magnetically Actuated System
AssigneeMicrovision, Inc.
InventorsRandall B. Sprague, Dean R. Brown, Matthew Ellis
Life of this patent
Estimating the term…
Abstract
A magnetically actuated system includes a conductor and a magnetic field apparatus to generate a magnetic field. The magnetic field apparatus includes magnets and magnetically permeable materials to focus the magnetic field in areas of the conductor that produce a drive torque when the conductor carries a current.
Claims20
An apparatus comprising:
- a first magnet oriented with a south pole facing down and a north pole facing up;
- a second magnet oriented parallel to the first magnet, the second magnet having a north pole facing down and a south pole facing up;
- a third magnet between, and oriented perpendicular to, the first and second magnets, the third magnet having a south pole facing the second magnet and a north pole facing the first magnet;
- and
- a movable platform having a conductive coil nominally oriented in a platform plane above the first, second, and third magnets.
2 more elements
An apparatus comprising:
- a first magnet oriented with a south pole facing down and a north pole facing up;
- a second magnet oriented parallel to the first magnet, the second magnet having a north pole facing down and a south pole facing up;
- a movable platform having a conductive coil nominally oriented in a platform plane above the first and second magnets;
- and
- a magnetically permeable core beneath the movable platform and between the first and second magnets.
2 more elements
An apparatus comprising:
- a first magnet oriented with a south pole facing down and a north pole facing up;
- a second magnet oriented parallel to the first magnet, the second magnet having a north pole facing down and a south pole facing up;
- a movable platform having a conductive coil nominally oriented in a platform plane above the first and second magnets;
- a third magnet above the first magnet and the platform plane, the third magnet having a south pole facing up and a north pole facing down;
- a fourth magnet above the second magnet and the platform plane, the fourth magnet having a south pole facing down and a north pole facing up;
- and
- at least one focusing plate of magnetically permeable material positioned between the platform plane and the third and fourth magnets to focus a resulting magnetic field in the platform plane.
4 more elements
A projection apparatus comprising:
- a light source to produce light;
- a mirror to reflect the light, the mirror mounted on a movable platform, the movable platform including a conductive coil;
- at least one magnet to produce a magnetic field;
- and
- at least one piece of magnetically permeable material positioned to modify the magnetic field in the conductive coil.
2 more elements
Dependencies are inferred from the claim text.