User interface
Assignee3M Innovative Properties Company
InventorsBrian E. Aufderheide, Paul D. Frank
Life of this patent
Estimating the term…
Abstract
A resistive touch panel including a base layer is disclosed. The touch panel includes a resistive layer covering the active area of the touch panel. The touch panel also includes a plurality of electrodes disposed to induce a voltage gradient across the resistive layer. The touch panel also includes a linearization pattern comprising a plurality of resistors disposed over at least a portion of the resistive layer for maintaining the uniformity of the voltage gradient across the resistive layer. The touch panel also includes an insulator covering a least a portion of the linearization pattern. The insulator reduces changes in the voltage gradient over time. A method of making a resistive touch screen is also disclosed.
Claims37
A resistive touch panel having an active area and including a base layer comprising:
- a resistive layer covering the active area of the touch panel;
- a plurality of electrodes disposed to induce a voltage gradient across the resistive layer;
- a linearization pattern comprising a plurality of resistors disposed over at least a portion of the resistive layer for maintaining the uniformity of the voltage gradient across the resistive layer;
- and
- an insulator covering a least a portion of the linearization pattern;
- wherein the insulator reduces changes in the voltage gradient over time.
The resistive touch panel of claim 5 wherein the insulator does not substantially increase the resistance of the plurality of resistors at ambient temperature and ambient humidity.
An electronic display including a touch panel comprising:
- a linearization pattern comprising a plurality of resistors disposed to straighten a voltage gradient induced by electrodes coupled to a resistive layer;
- an insulator covering at least a portion of the linearization pattern;
- wherein the insulator reduces changes in the voltage gradient over time.
A method of making a resistive touch screen having a base layer, a plurality of electrodes of the base layer separated by a resistor, and an insulator coupled to the resistor, the method comprising:
- applying the insulator to the resistor;
- wherein the insulator does not substantially increase the resistance of the resistor at ambient temperature and humidity.
A resistive touch screen comprising:
- a base layer coupled to a flexible layer by a fastener;
- a linearization region comprising a plurality of resistors between a first conductor and a second conductor for reducing a bow of a voltage gradient between the first conductor and the second conductor;
- an insulator means for maintaining the resistance of the plurality of resistors.
Dependencies are inferred from the claim text.