Ink jet application device and ink jet application method

An ink jet application device comprising:

• an application head having a plurality of nozzles and a plurality of actuators respectively mounted to the nozzles, and spraying ink from a nozzle by applying a certain voltage to an actuator;
• an information storage storing characteristic information for relating a volume of an ink-droplet to a voltage value to be applied to the actuator and setting information for relating a voltage value to be applied to the actuator to a DA setting value;
• a voltage calculation unit connected to the information storage, and calculating a voltage value related to the volume of the ink-droplet sprayed from the nozzle which is a voltage correcting object with reference to the characteristic information;
• a voltage difference calculation unit connected to the information storage and the voltage calculation unit, and calculating a voltage difference value between the calculated voltage value and a voltage value related to a specific volume of the ink-droplet;
• a converter connected to the information storage and the voltage difference calculation unit, and converting the voltage difference value into a DA setting value with reference to the setting information;
• an analog signal generator connected to the converter, and converting the DA setting value into an analog signal;
• a correction voltage generator connected to the analog signal generator, and generating as an output voltage an analog signal corresponding to a correction voltage obtained by adding the certain voltage to the voltage difference value when the analog signal is input thereto;
• and
• a supply unit connected to the correction voltage generator, and supplying the output voltage to the actuator mounted to the nozzle which is the voltage correcting object.

An ink jet application method employed in an ink jet application device configured to apply a certain voltage to an actuator mounted to a nozzle and spray an ink-droplet from the nozzle by a uniform volume, comprising steps of:

• reading characteristic information for relating a volume of the ink-droplet to a voltage value to be applied to the actuator;
• calculating a voltage value related to the volume of the ink-droplet sprayed from the nozzle which is a voltage correcting object with reference to the characteristic information;
• calculating a voltage difference value between the calculated voltage value and a voltage value related to a specific volume of the ink-droplet;
• and
• supplying a correction voltage obtained by adding the specific voltage to the voltage difference value to the actuator mounted to the nozzle which is the voltage correcting object.

An ink jet application method employed in an ink jet application device configured to apply a certain voltage to an actuator mounted to a nozzle and spray an ink-droplet from the nozzle by a uniform volume, comprising steps of:

• reading characteristic information for relating a volume of the ink-droplet to a voltage value to be applied to the actuator;
• calculating a voltage value related to the volume of the ink-droplet sprayed from the nozzle which is a voltage correcting object with reference to the characteristic information;
• calculating a voltage difference value between the calculated voltage value and a voltage value related to a specific volume of the ink-droplet;
• reading setting information for relating the voltage value to be applied to the actuator to a DA setting value;
• converting the voltage difference value into a DA setting value with reference to the setting information;
• converting the DA setting value into an analog signal;
• inputting the analog signal into a reference voltage of a three-terminal regulator;
• generating as an output voltage an analog signal corresponding to a correction voltage obtained by adding the specific voltage to the voltage difference value in the three-terminal regulator;
• and
• supplying the output voltage to the actuator mounted to the nozzle which is the voltage correcting object.