Sensing device for sensing a position relative to a surface
First Claim
1. A sensing device for sensing a position relative to a surface, the surface having coded data in a machine readable form and visible information for unaided human interpretation, the coded data having an array of separate data portions, each of the data portions respectively encoding data indicative of a position of the data portion on the surface, a plurality of the data portions encoding data indicative of respective positions in a region of the surface, the region being at least partially coincident with the visible information, the sensing device including:
- a retractable nib for interacting with the surface;
a retraction mechanism for slidably retracting and extending the nib relative to a housing of the sensing device;
a force sensor coupled to the retractable nib, said force sensor sensing a nib force applied to the surface by the nib;
an image sensor and processor configured for;
sensing at least one of the data portions when placed in an operative position relative to the surface;
determining if the sensed data portion is within the region;
determining if the sensed data portion contains control data indicating the sensing device to capture continuous nib force readings;
generating, using the sensed data portion, digital ink at least partially indicative of;
a position of the nib relative to the surface;
an orientation of the sensing device relative to the data portion;
generating force data as continuous nib force readings only if the sensed data portion contains said control data; and
a communicator configured to communicate the digital ink and the force data to a computer system,wherein said image sensor generates said digital ink only when said sensed nib force exceeds a predetermined threshold.
1 Assignment
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Accused Products
Abstract
A sensing device for sensing a position relative to a surface. The surface has printed therein or thereon coded data including at least one data portion, and visible information, at least some of the coded data being coincident with the visible information. The sensing device includes a sensor for sensing at least one data portion when placed in an operative position relative to the at least one region and generating indicating data using the sensed data portion. The indicating data is indicative of a position of the data portion relative to the surface and an orientation of the sensing device relative to the data portion. The indicating data is then communicated to a computer system to allow the position of the sensing device relative to the surface to be determined.
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Citations
13 Claims
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1. A sensing device for sensing a position relative to a surface, the surface having coded data in a machine readable form and visible information for unaided human interpretation, the coded data having an array of separate data portions, each of the data portions respectively encoding data indicative of a position of the data portion on the surface, a plurality of the data portions encoding data indicative of respective positions in a region of the surface, the region being at least partially coincident with the visible information, the sensing device including:
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a retractable nib for interacting with the surface; a retraction mechanism for slidably retracting and extending the nib relative to a housing of the sensing device; a force sensor coupled to the retractable nib, said force sensor sensing a nib force applied to the surface by the nib; an image sensor and processor configured for; sensing at least one of the data portions when placed in an operative position relative to the surface; determining if the sensed data portion is within the region; determining if the sensed data portion contains control data indicating the sensing device to capture continuous nib force readings; generating, using the sensed data portion, digital ink at least partially indicative of; a position of the nib relative to the surface; an orientation of the sensing device relative to the data portion; generating force data as continuous nib force readings only if the sensed data portion contains said control data; and a communicator configured to communicate the digital ink and the force data to a computer system, wherein said image sensor generates said digital ink only when said sensed nib force exceeds a predetermined threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification