Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Patent
1995-05-02
1998-08-18
Luu, Matthew
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
345174, G09G 500
Patent
active
057963894
ABSTRACT:
A touch screen having a high or fine resolution at relatively low cost is provided. In one embodiment, electrodes are placed directly on the surface of a CRT screen without the need for an electrode positioned on the rear surface. The touch screen may include a conductive coating and a protective coating which are preferably provided in a single vacuum chamber step. A high gain system including a high-frequency sampling bandpass filter provide discrimination of the desired signal over noise. A screen calibration technique is used to achieve linearization in order to convert the electric signals obtained from the screen into data indicative of the position of a touch on the screen.
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Bertram William K.
Pease Logan L.
International Game Technology
Luu Matthew
LandOfFree
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