Pen and paper information recording system
First Claim
1. Information recording apparatus for use with an encoded writing surface having a prerecorded pattern of pixels, each of said pixels containing optically readable absolute position information which identifies the location of the pixel on said writing surface, said apparatus comprising:
- a pen having a tip and including means for making visible markings on said writing surface and means for detecting the position of said tip on said writing surface by optically reading the pixels and obtaining said absolute position information when said tip is in contact with said surface and visible markings are made on said writing surface, said means for detecting the position of said tip including means for transmitting a light beam to said pattern of pixels and means for detecting reflected light from said pattern of pixels, said means for transmitting comprising a plurality of light emitting diodes, wherein said light emitting diodes have different transmission wavelengths and are energized sequentially; and
a recording unit coupled to said pen and responsive to the absolute position information read by said detecting means for electronically recording the position of the tip of said pen on said writing surface as the visible markings are made on said writing surface so that said recording unit contains an electronic representation of the visible markings on said writing surface.
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Accused Products
Abstract
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 surface. The system further includes a pen having a tip and including an instrument for writing on the writing surface and a detector for detecting the position of the tip on the writing surface by optically reading the pixels and obtaining position information when the tip is in contact with the surface. The system further includes a recording unit coupled to the pen and responsive to the position information for electronically recording the position of the pen tip on the writing surface as the markings are made on the writing surface so that the recording unit contains an electronic representation of the markings on the writing surface.
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Citations
24 Claims
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1. Information recording apparatus for use with an encoded writing surface having a prerecorded pattern of pixels, each of said pixels containing optically readable absolute position information which identifies the location of the pixel on said writing surface, said apparatus comprising:
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a pen having a tip and including means for making visible markings on said writing surface and means for detecting the position of said tip on said writing surface by optically reading the pixels and obtaining said absolute position information when said tip is in contact with said surface and visible markings are made on said writing surface, said means for detecting the position of said tip including means for transmitting a light beam to said pattern of pixels and means for detecting reflected light from said pattern of pixels, said means for transmitting comprising a plurality of light emitting diodes, wherein said light emitting diodes have different transmission wavelengths and are energized sequentially; and a recording unit coupled to said pen and responsive to the absolute position information read by said detecting means for electronically recording the position of the tip of said pen on said writing surface as the visible markings are made on said writing surface so that said recording unit contains an electronic representation of the visible markings on said writing surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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- 12. A writing sheet comprising a writing surface and a prerecorded pattern of pixels associated with the writing surface, each of said pixels containing encoded, optically readable position information which identifies an absolute coordinate position on said writing surface and yet is invisible to a human eye, each of said pixels comprising a first plurality of vertical data lines for encoding an X-coordinate of the pixel and a second plurality of horizontal data lines for encoding a Y-coordinate of the pixel, said data lines having predetermined widths and spacings, one of said first plurality of vertical data lines and said second plurality of horizontal data lines overlying the other in each of said pixels.
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17. A writing sheet comprising a writing surface and a prerecorded pattern of pixels associated with the writing surface, each of said pixels containing encoded, optically readable position information which identifies an absolute coordinate position on said writing surface and yet is invisible to a human eye, each of said pixels comprising a first plurality of vertical data lines for encoding an X-coordinate of the pixel and a second plurality of horizontal data lines for encoding a Y-coordinate of the pixel, one of said first plurality of vertical data lines and said second plurality of horizontal data lines overlying the other in each of said pixels, wherein said vertical data lines are spaced apart and have widths in the range of 50-150 micrometers and wherein said horizontal data lines are spaced apart and have widths in the range of 50-150 micrometers.
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21. Information recording apparatus comprising:
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a writing paper including a writing surface and a prerecorded pattern of pixels associated with the writing surface, each of said pixels containing encoded, optically readable position information which identifies an absolute coordinate position on said writing surface, each of said pixels comprising a first plurality of vertical data lines for encoding an X-coordinate of the pixel and a second plurality of horizontal data lines for encoding a Y-coordinate of the pixel, said data lines having predetermined widths and spacings, each of said pixels further including vertical and horizontal delimiter lines for delimiting a boundary of the pixel, one of said first plurality of vertical data lines and said second plurality of horizontal data lines overlying the other in each of said pixels; a pen having a tip and including means for making visible markings on said writing surface and means for detecting the position of said tip on said writing surface by optically reading the pixels and obtaining position information when said tip is in contact with said surface and visible markings are made on said writing surface; and a recording unit coupled to said pen and responsive to the position information read by said detecting means for electronically recording the position of the tip of said pen on said writing surface as the visible markings are made on said writing surface so that said recording unit contains an electronic representation of the visible markings on said writing surface. - View Dependent Claims (22, 23, 24)
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Specification