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 register when the 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 the 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 number of the clock signals and controlling the first memory to store the first nozzle selection signal in response to the counted number of the clock signals;
• a second counter counting the number of the clock signals and controlling the second memory to store the second 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 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 the number of the clock signals and allowing the same number of bits of the nozzle selection signal as the number of the shift registers to be input into the shift registers in response to the counted number of the clock signal to prevent a malfunction of the nozzle driving unit caused by a noise generated by the strobe signal.