Patent ID: 9465051
Filing Date: 2016-10-11
CPC Classification: G01R,G06K,H01L,H04N

Claim Text:
1. A capacitance sensor pixel element array comprising: an array of pixels, a plurality of the pixels arranged in rows and columns and each pixel having: (a) a capacitance transducer that accumulates charges in response to a contoured conductive outer capacitor surface, which is provided by an object to be imaged, a receiver electrode, and a dielectric layer separating the contoured conductive outer capacitor surface from the receiver electrode, and the dielectric layer directly contacting the receiver electrode, wherein at least one of the capacitance transducers includes: an amplifier having a TFT input, said input being coupled to a reference voltage and the receiver electrode; and a bias voltage source providing an input voltage to the input of the amplifier; and (b) a peak detecting circuit electrically connected to the receiver electrode to track the maximum charge available from the capacitance transducer; and one or more charge amplifiers to collect and amplify the charges collected by the peak detecting circuit; and a row/column reader to produce a contour map of the outer capacitor surface.