A pneumatic fluid dispenser has an electromechanical actuator that is supported by a dispenser body and operable to move a mechanical stop in the dispenser body. The apparatus detects a direction of continuity of the pixel signals based on pixel signals of the imaging pixels positioned around the non-imaging pixels, and determines, based on the detected direction of continuity, the pixel signals at the positions of the non-imaging pixels by processing the pixel output of the imaging pixels positioned around the non-imaging pixels. Provided that adjacent two of the Y electrodes are a first Y electrode and a second Y electrode, another end portion of the first Y electrode and another end portion of the second Y electrode have a coupling capacitance for AC-coupling the another end portion of the first Y electrode and the another end portion of the second Y electrode. Each signal transmission twisted line includes a pair of differential signal wires and a ground bare wire.