Patent ID: 7286118

Claim:
A display and user input device, comprising: a display substrate comprising a plate and display components formed on the plate; and an electric field sensing arrangement comprising electric field sensing components, the electric field sensing components comprising one or more electric field transmission electrodes, one or more electric field reception electrodes, and electric field sensing circuit components that include: one or more driver circuits that are configured to drive the one or more electric field transmission electrodes based on an alternating drive signal, and one or more sensing circuits that are configured to sense induced current in the one or more electric field reception electrodes; wherein one or more of the electric field sensing components are formed on the plate, and at least one sensing circuit of the one or more sensing circuits includes: a charge accumulator, and a switching circuit that is configured to couple at least one receive electrode of the one or more electric field reception electrodes to the charge accumulator, based on the alternating drive signal.