Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device
Patent
1993-01-19
2000-03-21
Liang, Regina
Computer graphics processing and selective visual display system
Display peripheral interface input device
Cursor mark position control device
345157, G09G 508
Patent
active
060408219
ABSTRACT:
In a cursor tracking system (FIG. 11), a pointing device includes a plurality of force sensors (304), optionally integrated with a keyswitch on a computer keyboard. The force sensors detect lateral and vertical forces applied to the keycap (300) by a user (302) for cursor control. Raw force data is acquired by A/D apparatus (306) and transmitted (310,312) to a host processor. Driver level software in the host linearizes the raw force values (316, FIG. 12D) to compensate for anomolies and nonlinearities in the force sensors, keyboard mechanics, and A/D. The resulting linear force values are adjusted (320) to compensate for preloading bias forces (318) on the sensors. The unbiased, linear force values and sensor configuration (322) are used to determine a net XY vector (324, FIG. 16). A speed value is determined by a quadratic mapping of the XY vector magnitude (328), taking mouse button status into account. The speed value is scaled by a speed factor, clamped according to a speed limit value, and the result used to determine a total displacement value which, in turn, is used to scale the XY vectors to determine X and Y cursor displacement for repositioning the cursor. The quadratic mapping coefficients, as well as the speed factor and speed limit values, are user-alterable at run time, to allow customizing the response of the cursor tracking system. The result is a low-cost pointing system having excellent responsiveness for ergonomic efficiency. The system is useful in most computer systems, such as IBM AT-compatible systems, to allow pointing operations without use of a separate pointing device such as a mouse.
REFERENCES:
patent: 4201489 (1980-05-01), Zapp
patent: 4246452 (1981-01-01), Chandler
patent: 4313113 (1982-01-01), Thornburg
patent: 4314227 (1982-02-01), Eventoff
patent: 4374381 (1983-02-01), Ng et al.
patent: 4408103 (1983-10-01), Smith, III
patent: 4410872 (1983-10-01), Stecher et al.
patent: 4439648 (1984-03-01), Reiner et al.
patent: 4649784 (1987-03-01), Fulks et al.
patent: 4654647 (1987-03-01), Wedam
patent: 4673919 (1987-06-01), Kataoka
patent: 4680577 (1987-07-01), Straayer
patent: 4712101 (1987-12-01), Culver
patent: 4734034 (1988-03-01), Maness et al.
patent: 4736191 (1988-04-01), Matzke et al.
patent: 4745301 (1988-05-01), Michalchik
patent: 4780701 (1988-10-01), Eppinger
patent: 4786895 (1988-11-01), Castaneda
patent: 4787051 (1988-11-01), Olson
patent: 4794366 (1988-12-01), Sakamoto
patent: 4816200 (1989-03-01), Stecher et al.
patent: 4816810 (1989-03-01), Moore
patent: 4856993 (1989-08-01), Maness et al.
patent: 4874549 (1989-10-01), Michalchik
patent: 4924433 (1990-05-01), Hirata et al.
patent: 4931781 (1990-06-01), Miyakawa
patent: 4933660 (1990-06-01), Wynne, Jr.
patent: 4951985 (1990-08-01), Pong et al.
patent: 4974183 (1990-11-01), Miller
patent: 4983786 (1991-01-01), Stevens et al.
patent: 5012231 (1991-04-01), Felsenstein
Alistair D.N. Edwards "Modelling blind user's interactions with an auditory computer interface" 1989, pp. 575-589.
Lindahl, "A Digital Compensation Technique for Pressure Transducers", 1982, pp. 343-344.
J. D. Rutledge, T. Selker, Force-to-Motion Functions for Pointing, Human-Computer Interaction--Interact '90, pp. 701-706, IBM T.J. Watson Research Center, Yorktown, N.W., 1990.
Osiris Technologies, Inc., OmniPoint.TM.Embedded Cursor Control, Nov. 1988.
IBM Technical Disclosure Bulletin "Compact Computer Keyboard", Mar. 1985. vol. 27 No. 10A pp. 5640-5642.
Borland International, Inc. Turbo Pascal version 3.0 reference manual, 1985, pp. 22-25.
IBM Corp., 700 IBM Technical Disclosure Bulletin, Oct. 31, 1988, vol. 31, No. 5, pp. 276-277.
Biehl Philip D.
Dodier Robert H.
Franz Patrick J.
Straayer David H.
In-Control Solutions, Inc.
Liang Regina
LandOfFree
Cursor tracking does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cursor tracking, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cursor tracking will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-734143