Optical stylus and passive digitizing tablet data input system

Details Optical stylus and passive digitizing tablet data input system Optical stylus and passive digitizing tablet data input system

1989-06-28

1991-09-24

Brier, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340706, 340708, 340712, 178 18, 178 19, 382 13, 382 58, G09G 128, G08C 2100, G06K 900

Patent

active

050517368

ABSTRACT:
A stylus and table X-Y data input system for a video display system. The pen includes an optical styling having a suitable pickup mechanism and the tablet is passive in nature and provides direct digitized data readout. 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 X-Y coordinate data stored therein. The pen and supporting hardware/software are rotationally insensitive so that the pen may be held in any desired position comfortable to a user. The system provides greatly improved resolution, sampling rate accuracy and general robustness particularly for such applications as text recognition as well as a wide variety of other graphical input uses.

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S. K. Hoo; "Coordinate Locator", in the IBM Technical Disclosure Bulletin, vol. 18, No. 5, Oct. 1975, pp. 1498-1499.
Murphy et al.; "Optical Digitizing Stylus" in the IBM Technical Disclosure Bulletin, vol. 27, No. 5, Oct. 1984, pp. 2806-2807.

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