Patent
Digital pen using speckle tracking
Ronald Fagin,Nimrod Megiddo,Robert J. T. Morris,Hal Jervis Rosen,Sridhar Rajagopalan,Thomas G. Zimmerman +5 more
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TLDR
In this article, a digital pen that has an ink writing tip includes a laser on a pen body that directs light toward paper across which the writing tip is stroked, and a CMOS camera or CCD is also mounted on the pen body for detecting reflections of the laser light, referred to as "speckles".Abstract:
A digital pen that has an ink writing tip includes a laser on a pen body that directs light toward paper across which the writing tip is stroked. A CMOS camera or CCD is also mounted on the pen body for detecting reflections of the laser light, referred to as “speckles”. A processor in the pen body determines relative pen motion based on the speckles. A contact sensor such as an FSR on the pen body senses when the tip is pressed against the paper, with positions being recorded on a flash memory in the pen body when the contact sensor indicates that the pen is against the paper. The memory can be later engaged with a handwriting recognition device to correlate the positions to alpha-numeric characters. Ordinary paper can be used, but, if desired, special bar-coded paper can also be used, so that the recorded positions can be tagged with a page number, form field, and absolute position on the page.read more
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Patent
Pen and paper information recording system
TL;DR: In this paper, an information recording system includes a writing paper having a writing surface and a prerecorded invisible pattern of pixels associated with the writing surface, each of the pixels contains encoded, optically readable position information which identifies a coordinate position on the writing surfaces.
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TL;DR: In this article, an interactive data entry apparatus is presented to accept, translate, store, and transmit data entered via a paper data entry form and to simultaneously create a written and magnetic or other computer data record.
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System for capturing multimedia information using a hand writing stylus pen which performs signal-to-data conversion inside the pen and stores data in the memory inside the pen
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Device and method for determining movement of a surface
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