Brightpen/pad graphic device for computer inputs and the like
First Claim
1. An apparatus for digitizing graphic information on sheets of paper and the like comprising means of transporting said sheets of paper, photodetectors and collimators in the form of a detector array capable of imaging successive lines of graphic information on said sheet of paper and which photodetectors are also used to digitize the coordinate position of a light emitting stylus or light absorbing stylus by means for converting analog signals from said photodetectors to digital signals suitable for input into a computer or the like.
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Abstract
Scanning devices are used to enter graphic information into computer systems. They typically use photo-optic detectors. Digitizing devices are used to enter coordinate positions into computer systems. One technique uses styluses, either fingers or light emitters. This invention shows how the same photo-optical systems can perform both functions.
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Citations
4 Claims
- 1. An apparatus for digitizing graphic information on sheets of paper and the like comprising means of transporting said sheets of paper, photodetectors and collimators in the form of a detector array capable of imaging successive lines of graphic information on said sheet of paper and which photodetectors are also used to digitize the coordinate position of a light emitting stylus or light absorbing stylus by means for converting analog signals from said photodetectors to digital signals suitable for input into a computer or the like.
Specification