Ink jet printer with an independent driving circuit for preheat and heat maintenance

Abstract

An ink jet printer with an independent preheating driving circuit includes at least an ink jet unit. Each ink jet unit has an input end for receiving energy, and a corresponding nozzle. When energy received by the ink jet unit via the input end exceeds a predetermined threshold value, the ink jet unit ejects ink from the nozzle. The printer also has a first driving circuit electrically connected to the input end for providing energy for printing, and a second driving circuit electrically connected to the input end for providing preheating energy. When the ink jet unit receives energy from the first driving circuit for printing, the second driving circuit stops providing the preheating energy to the ink jet unit.

Dependencies are inferred from the claim text.