Patent
Pen and paper information recording system
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TLDR
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.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.read more
Citations
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References
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Patent
Optical stylus and passive digitizing tablet data input system
William E. Bennett,Stephen J. Boies,Anthony Robin Davies,Karl-Friedrich Etzold,Todd Kanner Rodgers +4 more
TL;DR: In this paper, a stylus and table X-Y data input system for a video display system is presented, where absolute positional information is encoded in binary form in the tablet in such a fashion that the pen position upon the tablet is automatically determinable by illuminating a particular area of the tablet and reading off the digitized XY coordinate data stored therein.
Patent
Narrow-bodied, single-and twin-windowed portable laser scanning head for reading bar code symbols
TL;DR: In this paper, a narrow-bodied, single-and twin-windowed, hand-held, laser scanning head for reading bar code symbols includes at least one window mounted at the rear region of the head, and through which either the incident beam going to the symbol and/or the reflected beam returning from the symbol, passes unobstructedly and exteriorly of, and past, the front and intermediate body regions of the leader.
Patent
Instant portable bar code reader
George E. Chadima,Vadim Laser +1 more
TL;DR: In this article, a portable instant bar code reader including a hand-held reader unit having a flash type illuminator is triggered to illuminate a bar code label positioned adjacent to a light receiving window of the reader.
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Hand-held instant bar code reader system with automated focus based on distance measurements
TL;DR: In the instant reading of bar codes by flash illumination, the disclosed system automatically adapts to bar code configurations of greater extent and curvature, for example by measuring distance to one or more points on the bar code and adjusting a lens barrel, and/or by selecting from multiple image paths through a lens system as discussed by the authors.
PatentDOI
Coordinates input apparatus
Kiyoshi Kaneko,Atsushi Tanaka +1 more
TL;DR: In this article, the authors proposed a means for computing the distance between the input pen and the vibration detection means from the time determined by the control means, where the time of arrival of the vibration is defined as the zero-cross point of the signal.