Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1995-09-21
1997-12-02
Liang, Regina D.
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345146, G09G 508
Patent
active
056941501
ABSTRACT:
A graphical user interface system is provided having an event-driven control program with a unified user input pointing event stream without distinction of source and a graphical user interface having a virtual display space containing objects. The control program processing events related to a plurality of user inputs representing different locations within the virtual display space, and operates optionally in two modes. A first mode permits the plurality of user inputs to interact, allowing an object in the virtual display space at a first location specified by an initial user input to be associated with a second location specified by a concurrent and subsequently terminating user input. In this case, the control program has a counter which increments on activity of any user input and decrements on cessation of activity of any user input, for determining an initial user input condition, temporal concurrence of a plurality of user inputs, and a terminal user input condition. A second mode processes a series of events related to a first user input without apparent functional interference with a concurrent series of events related to a second user input.
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Sigona Michael R.
Winner Anthony
Elo TouchSystems, Inc.
Liang Regina D.
Osorio Ricardo
LandOfFree
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