Telegraphy – Systems – Position coordinate determination for writing
Patent
1987-05-26
1989-02-21
Schreyer, Stafford D.
Telegraphy
Systems
Position coordinate determination for writing
G08C 2100
Patent
active
048067091
ABSTRACT:
A method and apparatus are disclosed for determining the location of a designated point on an electrically sensitive touch-screen surface while minimizing aberrations introduced by non-uniformity in the field applied to the surface, by attaching a plurality of field-producing discrete point electrodes to widely spaced points on the surface in a predetermined geometric pattern and by measuring the currents drawn from the point electrodes upon the capacitive touching of a designated location on the surface.
REFERENCES:
patent: 3911215 (1975-10-01), Hurst et al.
patent: 4198539 (1980-04-01), Pepper, Jr.
patent: 4220815 (1980-09-01), Gibson et al.
patent: 4233522 (1980-11-01), Grummer et al.
patent: 4293734 (1981-10-01), Pepper, Jr.
patent: 4353552 (1982-10-01), Pepper, Jr.
patent: 4371746 (1983-02-01), Pepper, Jr.
patent: 4680429 (1987-07-01), Murdock et al.
Interaction Systems, Inc., "The TK-1000 CRT Touch Development System Operators Manual", Newtonville, Mass., May 1983.
Sierracin/Intrex Products, "Transparent Electrically Conductive Film".
Sierracin/Intrex Products, "TransFlex:Unique Concepts in Membrane Switches, EMI Shielding and LCD Heaters".
Sun-Flex Co., Inc. "Touchpen On-Screen Digitizer", Novato, Calif.
Microtouch Systems, Inc.
Schreyer Stafford D.
LandOfFree
Method of and apparatus for sensing the location, such as coordi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of and apparatus for sensing the location, such as coordi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of and apparatus for sensing the location, such as coordi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1523543