公开(公告)号：DE69021661T2

公开(公告)日：1996-04-18

申请号：DE69021661

申请日：1990-06-05

Applicant: IBM

Inventor： BENNETT WILLIAM EDWARD ,  BOIES STEPHEN JOY ,  DAVIES ANTHONY ROBIN ,  ETZOLD KARL-FRIEDRICH ,  RODGERS TODD KANNER

IPC: G06F3/042 ,  G06F3/03 ,  G06F3/033 ,  G06K11/08

Abstract: A stylus and tablet X-Y data input system for a video display system. The pen comprises an optical stylus having suitable pickup means 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.

公开(公告)号：DE69021661D1

公开(公告)日：1995-09-21

申请号：DE69021661

申请日：1990-06-05

Applicant: IBM

Inventor： BENNETT WILLIAM EDWARD ,  BOIES STEPHEN JOY ,  DAVIES ANTHONY ROBIN ,  ETZOLD KARL-FRIEDRICH ,  RODGERS TODD KANNER

IPC: G06F3/042 ,  G06F3/03 ,  G06F3/033 ,  G06K11/08

Abstract: A stylus and tablet X-Y data input system for a video display system. The pen comprises an optical stylus having suitable pickup means 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.