METHOD FOR THE FORMATION OF PIXEL ELEMENTS AND PRINT HEAD AND INKJET PRINTING DEVICE FOR APPLICATION OF THE METHOD

摘要

In a method for the formation with a print head (10) on a substrate (2) of pixels (4) with a predefined pixel colour (X) by means of droplet deposition, a print head (10) is used which is set up so that, during operation, it performs in one pass a forward and return movement in relation to the substrate (2). The print head (10) comprises ink nozzles (12) which are aligned in a row (R) behind one another in the direction of movement of the print head (10), which row (R) comprises an initial series (B) and a final series (E) of ink nozzles (Bn; Em), for at least two different first colours, and also a middle series (M) of ink nozzles (M1) for at least two different additional colours, which additional colours cannot be formed from the first colours. The method comprises the steps of printing a pixel with a predefined pixel colour (X) by the successive deposition of ink droplets of colours from the row (R) of ink nozzles, in which black (K) is composed as the first and/or the last colour with the aid of ink droplets of the first colours from the ink nozzles (Bn; Em).