Digitizer cursor coil for reducing edge effect
First Claim
1. A digitizer cursor coil for use in a digitizer cursor used as part of a digitizer assembly, comprising:
- (A) a primary winding formed of conductor wrapped into a first coil of a selected diameter; and
(B) a secondary winding formed of a conductor wrapped into a second coil, said second coil being substantially concentric with said first coil and having a diameter greater than said first coil, said conductors forming said primary and secondary windings being connected together in series such that when said conductors are energized, current flow in said primary winding is a first direction and in said secondary winding in a second direction opposite said first direction.
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Accused Products
Abstract
A digitizer cursor coil for use as part of a digitizer is disclosed. The cursor coil includes a primary winding and a secondary winding concentric with the primary winding and having a larger diameter than same. The windings are connected together in series such than when they are energized, current flow in the primary coil is in a direction opposite to the direction of the current flow in the secondary coil. The digitizer cursor includes a lens assembly comprising a bottom core and a top core both of which are formed from a disk shaped transparent material. The primary winding is wrapped into a groove formed in the bottom core, the secondary winding is wrapped into a groove formed in the top core. Cross hairs and a cross hair center point are formed in the bottom core. The top core is movable relative to the top core so that when the cursor coil is energized the center point of the magnetic field formed thereby can be aligned with the cross hair center point.
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Citations
20 Claims
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1. A digitizer cursor coil for use in a digitizer cursor used as part of a digitizer assembly, comprising:
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(A) a primary winding formed of conductor wrapped into a first coil of a selected diameter; and (B) a secondary winding formed of a conductor wrapped into a second coil, said second coil being substantially concentric with said first coil and having a diameter greater than said first coil, said conductors forming said primary and secondary windings being connected together in series such that when said conductors are energized, current flow in said primary winding is a first direction and in said secondary winding in a second direction opposite said first direction. - View Dependent Claims (2, 3, 4, 5)
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6. A digitizer cursor for use as part of a digitizing device, comprising:
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A. a bottom core composed of transparent material formed in the shape of a disk, having a selected first diameter, said bottom core having an annular outer surface therearound, B. a top core composed of transparent material formed in the shape of disk having a second diameter greater than the bottom core first diameter; and C. a cursor coil including; (i) a primary winding formed of a conductor wrapped around said bottom core outer surface, (ii) a secondary winding formed of a conductor wrapped around said top core outer surface; and (iii) said conductors forming said primary and secondary windings connected together in series so that when said conductors are energized, current flows in said primary winding in a first direction, and in said secondary winding in a second direction opposite said first direction. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A digitizer cursor coil for use in a digitizer cursor used as part of a digitizer assembly, comprising:
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(A) a primary winding formed of conductor wrapped into a first coil of a selected diameter; and (B) a secondary winding formed of a conductor wrapped into a second coil, said second coil being substantially concentric with said first coil and having a diameter different than said selected diameter of said first coil, said conductors forming said primary and secondary windings being connected together in series such that when said conductors are energized, current flow in said primary winding is a first direction and in said secondary winding in a second direction opposite said first direction. - View Dependent Claims (17, 18, 19, 20)
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Specification