Multiplexed touch sensitive screen system
Patent 4386232 Issued on May 31, 1983. Estimated Expiration Date: 
June 16, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 16, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3302194 3516067 Graphical input terminal Patent #: 3959585 InventorAssigneeApplicationNo. 06/274112 filed on 06/16/1981US Classes:345/173Touch panelExaminersPrimary: Schreyer, Stafford D.Attorney, Agent or FirmInternational ClassG06F 3/033 (20060101)AbstractIn a system employing a plurality of touch sensitive screens which generate analog signals representing the coordinates of a position touched, a selection means is provided to select the screens rapidly in sequence with the analog output signals from the selected screen being fed to analog-to-digital converters. The sequence of selection proceeds rapidly from screen to screen until it is detected that a screen has been touched whereupon the selection sequencing pauses to permit the analog-to-digital conversion to be carried out and the resulting digital values to be read out to a computer system. Upon readout of the digital values to the computer system, the screen selection sequencing is again permitted to proceed. Means are provided to indicate whether a selected screen that is being touched was touched the last time the same screen was selected.Other References
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