Capacitance sensing circuits, methods and systems having conductive touch surface

Abstract

A system includes an electromechanical device coupled to a sensing device to detect input to the electromechanical device and display to displays information related to the electromechanical device. The sensing device includes a touch surface including tactile features delineating a portion of the touch surface to be touched by the conductive object. A sensor of the system is to detect the conductive object proximate to the delineated portion of the touch surface based on a capacitance.

What is claimed is: 
     
         1 - 20 . (canceled) 
     
     
         21 . A system, comprising:
 an electromechanical device;   a sensing device coupled to the electromechanical device and configured to detect input to the electromechanical device;   a display configured display information related to the electromechanical device, wherein the sensing device comprises,   a touch surface including tactile features delineating a portion of the touch surface to be touched by a conductive object,   a sensor configured to detect the conductive object proximate to the delineated portion of the touch surface based on a capacitance.   
     
     
         22 . The system of  claim 21 , wherein the tactile features are arranged around a perimeter of the portion of the touch surface to be touched by the conductive object. 
     
     
         23 . The system of  claim 21 , wherein the tactile features are arranged as one or more braille characters. 
     
     
         24 . The system of  claim 21 , wherein the electromechanical device is a household appliance controllable through the sensing device, wherein the display is configured to indicate a status of the household appliance. 
     
     
         25 . The system of  claim 21 , wherein the electromechanical device is an automotive device controllable through the sensing device, wherein the display is configured to indicate a status of the household appliance.