Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1996-02-08
1997-12-09
Powell, Mark R.
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
G06F 3033
Patent
active
056965320
ABSTRACT:
A method for controlling static and quasi-static devices for pointing the cursor on the screen of interactive systems, the method comprising: providing an actuation element having a button and being subject to control actions that have a lateral component; periodically sensing the components of the control action in directions x and y; processing signals corresponding to the components in the directions x and y; calculating the modulus and the direction parameters of the movement; converting the modulus according to a preset conversion rule; storing, at each cycle, the values of the modulus, of the corrected modulus, and of the direction parameters; transferring and restoring the values; feeding the values of the current cycle and the values of the previous cycle, toward elements for calculating components of the incremental movements in directions x and y to be imparted to the cursor; feeding the components to an adder element, and processing signals to be transmitted to the connected interactive system for controlling movements of the cursor matching control actions.
A logic unit is also provided for carrying out the method.
REFERENCES:
patent: 4922236 (1990-05-01), Heady
patent: 4935728 (1990-06-01), Kley
patent: 5261054 (1993-11-01), Lerner et al.
patent: 5563269 (1996-10-01), Caprara
Josif Albert
Modiano Guido
Powell Mark R.
Sintecna S.r.l.
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