Patent ID: 8388108
Filing Date: 2013-03-05
Classification: B41J

Abstract:
1. A liquid droplet spraying apparatus with a nozzle body that comprises a chamber containing a fluid, and a nozzle for spraying the fluid contained in the chamber toward one side of a material to be printed, the liquid droplet spraying apparatus comprising: an electrostatic spray module which is arranged in the vicinity of the chamber or the nozzle and forms an electrostatic field in the fluid contained in the chamber to provide a first spray force so that the fluid can be sprayed through the nozzle to form a liquid droplet; a physical spray module which is arranged inside the chamber and opposite the nozzle, and provides a second spray force for assisting the first spray force when the first spray force is generated; and a control unit which controls the electrostatic spray module and the physical spray module so that the first spray force and the second spray force can be provided in a specific pattern, wherein the electrostatic spray module comprises a first electrode unit arranged to be spaced apart from the nozzle, a second electrode unit arranged in an inside of the nozzle, and an electrostatic signaler applying an electrostatic signal between the first electrode unit and the second electrode unit, the physical spray module comprises a piezoelectric operator or a heating operator, and a driving signaler for applying a driving signal to the piezoelectric operator or the heating operator, and wherein multiple nozzle bodies are arranged in plural neighboring to each other, and insulating spacers are arranged on a front side of each nozzle body to provide electrical insulation between the first electrode unit and the second electrode unit and to exclude interference of electric field between a plurality of nozzle bodies.