The present invention relates to a funnel apparatus for filling of liquids, which comprises a funnel, a sealing means, a locking means, and a soft tube. The intensity setpoint is formulated to have at least a first value and at least a second value greater than the first value, the intensity setpoint having the second value before the start of a phase during which the intensity is not controllable. The planarization protective layer is electrically connected with a drain electrode of the TFT unit and is conductive.