Resistive touchscreen having multiple selectable regions for pre

Details Resistive touchscreen having multiple selectable regions for pre Resistive touchscreen having multiple selectable regions for pre

1996-04-12

1998-09-29

Saras, Steven

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

345174, 345179, 178 18, 178 19, G09G 302, G08C 2100

Patent

active

058151419

ABSTRACT:
A resistive two sheet touchscreen that provides discrimination between objects touching the surface thereof. This is achieved by subdividing at least one sheet into a selected number of separated portions of selected configuration. Each of these portions is connected through a switch apparatus to circuitry for evaluating a signal on the separated portions corresponding to the position of touch. This switch can be utilized to deactivate any selected portion so that an object contacting this portion provides no signal to the circuitry. Any active portion that remains connected to the circuitry provides position information as with any touchscreen. Accordingly, for example, the touchscreen can be made insensitive to portions of a hand, while being sensitive to a stylus held by that hand. An embodiment utilizing a single resistive layer coupled with a conductive layer is described together with an embodiment utilizing two resistive layers, are described.

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