Switch for pen-down sensing in electronic styli

Details Switch for pen-down sensing in electronic styli Switch for pen-down sensing in electronic styli

1990-09-19

1995-04-25

Hjerpe, Richard

Computer graphics processing and selective visual display system

Display peripheral interface input device

Stylus

178 18, 200 52R, G08B 2100

Patent

active

054103347

ABSTRACT:
A pen-down sense switch for electronic styli is based on three geometric principles. The first is that a regular convex surface contacts any other surface possessing a larger (or a relative negative) radius of curvature at a single point. The second principle is that rigid bodies may be translated (within limits) without changing their size or shape. The third is that given a plane with a constant radius of curvature, three points which can contact its surface will uniquely determine its position. Within the physical environment and subject to the forces which typically act on stylus switches, machined, solid metal components can be made to be a better than first-order approximation to ideal geometric objects.

REFERENCES:
patent: 2475696 (1949-07-01), Cornish
patent: 3098141 (1963-07-01), Wintriss
patent: 3835453 (1974-10-01), Narayanan
patent: 4131880 (1978-12-01), Siy et al.
patent: 4268730 (1981-05-01), Higgins et al.
patent: 4288925 (1981-09-01), McMurtry
patent: 4375723 (1983-03-01), McMurtry
patent: 4532376 (1985-07-01), Rockwell
patent: 4667182 (1987-05-01), Murphy
patent: 4695680 (1987-09-01), Kable

Affiliated with

Also associated with

Rating

Switch for pen-down sensing in electronic styli does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Switch for pen-down sensing in electronic styli, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switch for pen-down sensing in electronic styli will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1570713