Method and system for digitizing handwriting

Details Method and system for digitizing handwriting Method and system for digitizing handwriting

1997-06-30

1999-11-02

Shalwala, Bipin H.

Computer graphics processing and selective visual display system

Display peripheral interface input device

Stylus

178 1901, 345156, 367117, 382187, 382188, G08C 2100

Patent

active

059779586

ABSTRACT:
A system and method for tracking a moving object very accurately at short ranges in general, and a handwriting input device such as a pen in particular. The method is based on measuring times of arrival of ultrashort RF pulses transmitted by the pen to an array of receivers. Dealing with the ultrashort events is done by "strobing" the pen position. To achieve the necessary resolution, on the order of 0.25 mm, the times of arrival of the pulses are determined by sampling the pulses digitally and fitting appropriate mathematical functions to the samples pulses. The time jitter is averages over many sweeps, and a dedicated receiver is used for synchronization.

REFERENCES:
patent: 4206314 (1980-06-01), Prugh et al.
patent: 4318096 (1982-03-01), Thornburg et al.
patent: 4506354 (1985-03-01), Hansen
patent: 4564928 (1986-01-01), Glenn et al.
patent: 4588757 (1986-05-01), Mori et al.
patent: 4641354 (1987-02-01), Fukunaga et al.
patent: 4654648 (1987-03-01), Herrington et al.
patent: 4758691 (1988-07-01), De Bruyne
patent: 4777329 (1988-10-01), Mallicoat
patent: 4814552 (1989-03-01), Stefik et al.
patent: 4862152 (1989-08-01), Milner
patent: 4980519 (1990-12-01), Mathews
patent: 4991148 (1991-02-01), Gilchrist
patent: 5142506 (1992-08-01), Edwards
patent: 5227522 (1993-07-01), Suzuki
patent: 5247137 (1993-09-01), Epperson
patent: 5294792 (1994-03-01), Lewis et al.
patent: 5308936 (1994-05-01), Biggs et al.
patent: 5349139 (1994-09-01), Verrier et al.
patent: 5414227 (1995-05-01), Schubert et al.
patent: 5475401 (1995-12-01), Verrier et al.
patent: 5510800 (1996-04-01), McEwan
patent: 5517579 (1996-05-01), Baron et al.
patent: 5589838 (1996-12-01), McEwan
patent: 5717168 (1998-02-01), DeBuisser et al.

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