Flow deflector, inkjet printing method, inkjet printing device, and method for manufacturing display substrate

An inkjet printing device, comprising:

• a supporting platform configured to support a substrate to be processed, wherein the substrate is provided with a plurality of regions in which the ink is to be dripped;
• a plurality of nozzles for ejecting the ink, the plurality of nozzles being arranged above the supporting platform;
• and
• a flow deflector, wherein the flow deflector comprises a plate-shaped body, the plate-shaped body comprises a first surface and a second surface opposite to each other, a plurality of through holes is arranged in the plate-shaped body, each of the plurality of through holes penetrates from the first surface to the second surface, and comprises a first opening formed on the first surface and a second opening formed on the second surface, and an opening area of the first opening is larger than an opening area of the second opening, the first surface of the flow deflector is oriented toward the plurality of nozzles, the second surface of the flow deflector is oriented toward the supporting platform, the second opening of each of the plurality of through holes is arranged opposite to a respective one of the plurality of regions, and each of the plurality of nozzles is arranged opposite to the first opening of a respective one of the plurality of through holes, and the nozzles are not physically connected to the flow deflector, and are configured to be movable relative to the flow deflector in a direction being parallel to the supporting platform.