Fuente: Wipo "Sensorization" Disclosed herein is a skin contact sensor comprising a sensor array of sensor pixels, wherein: each sensor pixel comprises at least one thin film transistor, TFT, and a sensing electrode; a top surface of the sensor array provides a contact surface for contacting by an object to be sensed; and each sensor pixel is formed of a plurality of layers including an optical colour filter layer arranged to filter one or more colours of light.