Dual Capacitive Touch Confirmation

A method of detecting a user touching a touch-sensitive screen, the method comprising:

• providing a substrate that is elastically deformed or deflected when touched by a finger of a human user;
• positioning a first capacitive sensor relative to the substrate such that the first capacitive sensor detects the substrate being touched by the finger, the first capacitive sensor being elastically deformed by the finger of the human user touching the substrate;
• and
• positioning a second capacitive sensor relative to the first capacitive sensor such that the second capacitive sensor detects a change in capacitance between the first capacitive sensor and the second capacitive sensor due to the elastic deformation of the first capacitive sensor that results from the substrate being touched by the finger.

A method of detecting a user touching a touch-sensitive screen, the method comprising:

• providing a user-facing substrate on the touch-sensitive screen;
• applying a first voltage to a first capacitive sensor;
• detecting the substrate being touched by a finger of the user, the detecting being performed by use of the first capacitive sensor while the first voltage is being applied to the first capacitive sensor;
• in response to the detecting step, electrically grounding the first capacitive sensor and applying a second voltage to a second capacitive sensor;
• and
• detecting the substrate being touched by the finger, the detecting being performed by use of the second capacitive sensor while the first capacitive sensor is electrically grounded and while the second voltage is being applied to the second capacitive sensor.