Ink-jet printer and method of driving head thereof

A method of driving a head of an ink-jet printer, comprising:

• inputting a nozzle selection data signal to select a nozzle among a plurality of nozzles into shift registers while synchronizing the nozzle selection data signal with clock signals;
• disabling the shift registers when a number of the clock signals is greater than a set-up value after counting the number of the clock signals;
• latching the nozzle selection data signal;
• and
• inputting a discharge signal to discharge ink from the selected nozzle based on the latched nozzle selection data signal.

An ink-jet printer having a plurality of nozzles, comprising:

• a controller generating a nozzle selection signal to drive corresponding ones of the nozzles, clock signals, and a strobe signal;
• a memory storing the nozzle selection signal;
• a counter counting a number of the clock signals and controlling the memory to store the nozzle selection signal in response to the counted number of the clock signals;
• and
• a nozzle driving unit driving the nozzles in response to the stored nozzle selection signal and the strobe signal.

An ink-jet printer having a plurality of first groups of nozzles and a second group of nozzles contained in one of the first groups of nozzles, comprising:

• a controller generating a first nozzle selection signal corresponding to the first group of nozzles, a second nozzle selection signal corresponding to the second group of nozzles, clock signals, and a strobe signal;
• a first memory storing the first nozzle selection signal;
• a second memory storing the second nozzle selection signal;
• a first counter counting the clock signals and controlling the first memory to store the first nozzle selection signal in response to a first counted number of the clock signals;
• a second counter counting the clock signals and controlling the second memory to store the second nozzle selection signal in response to a second counted number of the clock signals;
• and
• a nozzle driving unit driving the nozzles in response to the stored first nozzle selection signal, the stored second nozzle selection signal, and the strobe signal.

An ink-jet printer having a plurality of nozzles, comprising:

• a first memory storing a first nozzle selection signal;
• a second memory storing a second nozzle selection signal transmitted from the first memory;
• a controller generating a strobe signal after the first nozzle selection signal is stored in the first memory to prevent a noise generated due to the strobe signal from being presented in one of the first nozzle selection signal and the second nozzle selection signal;
• and
• a nozzle driving unit driving the nozzles in response to the second nozzle selection signal and the strobe signal.

An ink-jet printer having a plurality of nozzles, comprising:

• a plurality of shift registers storing a nozzle selection signal;
• a controller generating clock signals and a strobe signal;
• a nozzle driving unit driving the nozzles in response to the nozzle selection signal and the strobe signal;
• and
• a counter counting a number of the clock signals and allowing a same number of bits of the nozzle selection signal as a number of shift registers to be input into the shift registers in response to the counted number of the clock signals to prevent a malfunction of the nozzle driving unit caused by a noise generated by the strobe signal.