Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Patent
1997-01-17
2000-05-09
Luu, Matthew
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
345174, G09G 500
Patent
active
060610514
ABSTRACT:
A method and system for issuing pen-input commands from a computer system to a controller for a touchpad to initialize the controller to the desired operating mode for the touchpad. The touchpad may emulate the function of a mouse pointing device or provide absolute coordinates of a pointed object such as human finger, a stylus, or a pen upon the touchpad. The pen-input commands will set the autocursor mode and boundaries for the edgezone and the deadzone upon the touchpad, the times for the presence detect signal to create the stroke signal, the threshold of movement of the pointed object upon the touchpad necessary to send the mouse protocols to the computer system, the mode of the pen-input mouse controller is to operate, whether the pen-input mouse controller is to send the mouse protocol or the pen-input computer interface protocol to the computer system, the averaging algorithm to used by the absolute coordinate calculator, the minimum pressure required to activate the touchpad, the parameters for the autocursor mode operation, and the time parameters for the autopower save circuit.
REFERENCES:
patent: 4954817 (1990-09-01), Levine
patent: 5701141 (1997-12-01), Schmenk et al.
Chan Chow Fong
Geng Xia
Lim Swee Hock Alvin
Ng Maisy Mun Lan
Ong Eng Yue
Ackerman Stephen B.
Knowles Billy J.
Luu Matthew
Saile George O.
Tritech Microelectronics
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