The invention relates to a plug connection device, comprising a plug which has contacts and comprising mating contacts arranged on a substrate, wherein the contacts are intended for electrical contacting of the mating contacts. At least one conductive film is provided above a light shielding layer between RGB color filter units. The maximumminimum detector circuit detects a maximum value detection signal and a minimum value detection signal in the output signals supplied from the unit delay elements. Two electrodes are provided within the chamber such that three electric fields are generated, a first field extending from the electrospray assembly to the first electrode, a second field extending from the second electrode to the first electrode, and a third field extending from the second electrode to the vacuum interface. The reaction in the substrate reservoir can be monitored, e.