Patent ID: 9279837
Filing Date: 2016-03-08
CPC Classification: G01R,G06K,H04N

Claim Text:
1. A sensor apparatus, comprising: an array of active sensor elements arranged in columns and rows; a first plurality of thin film access devices, each thin film access device being associated with a respective group of at least two sensor elements that are coupled in series in a first current path through which an activation current from an activation current source is provided to activate the respective group of at least two sensor elements, the thin film access device coupling the respective group of at least two sensor elements to the activation current from the activation current source when biased in an on condition; and a second plurality of thin film access devices, each thin film access device from the second plurality of thin film access devices being coupled to a respective sensor element, wherein each sensor clement is read through a respective second current path including a respective thin film access device from the second plurality of thin film access devices through which a reading current is provided when accessing the sensor element for reading; and wherein the second current paths do not include the thin film access devices of the first current paths, whereby noise from the first plurality of thin film access devices is isolated from the second current paths, wherein for each row of sensor elements the sensor elements in each group of at least two sensor elements and its respective thin film access device from the first plurality of thin film access devices are coupled in series between a row line and a first column line, through which the activation current is provided, each sensor element also being coupled to a respective second column line through which the reading current is provided to its respective thin film access device of the second current path.