JP2004338414A5

JP2004338414A5 -

Info

Publication number: JP2004338414A5
Application number: JP2004219119A
Authority: JP
Filing date: 2004-07-27
Publication date: 2005-09-29
Anticipated expiration: 2018-07-22

Claims

Inkjet recording that has a print head provided with a pressure generating element corresponding to each of a plurality of nozzles, and discharges ink droplets from each nozzle by operating each pressure generating element based on input data In the device
Drive signal generating means for generating a drive signal for printing for ejecting ink droplets and a drive signal for fine vibration for operating the pressure generating element to such an extent that ink droplets are not ejected;
Generate dot pattern data including bit data for printing for selecting the drive signal for printing and bit data for fine vibration for selecting the drive signal for fine vibration based on the input print data Data generation means for
Switch means capable of inputting the printing drive signal and the fine vibration drive signal to the pressure generating element within one printing cycle based on the dot pattern data input from the data generating means; ,
The data generation means selects a predetermined pattern according to the operating state of each nozzle to be analyzed based on the print data, and according to each discharge data for discharging ink existing in the predetermined pattern , An ink jet recording apparatus, wherein the dot pattern data is generated by setting the bit data for fine vibration for fine vibration performed before ejection data at a predetermined position.

In the data generation means, a first pattern is set as the predetermined pattern,
In the first pattern, the fine vibration drive signal is not selected at a print cycle in a predetermined period immediately before ink droplet ejection, and the fine vibration drive signal is selected at a predetermined ratio in other print cycles. The ink jet recording apparatus according to claim 1, wherein the bit data for fine vibration is set as described above.

In the data generation means, a second pattern is set as the predetermined pattern,
In the second pattern, the fine vibration drive signal is not selected in the printing period in the first period immediately before ejecting the ink droplets, and the fine vibration is not used in the printing period in the second period immediately before the first period. 2. The ink jet recording apparatus according to claim 1, wherein the fine vibration bit data is set so as to select a drive signal at a predetermined ratio.

The ink jet recording apparatus according to claim 3, wherein the first period and the second period can be set even in an acceleration region in which the print head is accelerated.

In the data generation means, a third pattern is set as the predetermined pattern,
In the third pattern, the fine vibration drive signal is not selected in the printing cycle in the first period immediately after the ink droplets are ejected, and the fine vibration is generated in the printing period in the second period immediately following the first period. 2. The ink jet recording apparatus according to claim 1, wherein the fine vibration bit data is set so as to select a driving signal for use at a predetermined ratio.

In the data generation means, a fourth pattern is set as the predetermined pattern,
In the fourth pattern, the fine vibration bit data is set so that the fine vibration drive signal is selected at a predetermined ratio for each predetermined period with respect to a nozzle that does not eject ink droplets during main scanning. The ink jet recording apparatus according to claim 1, wherein

The length of the period for setting the bit data for fine vibration so as to select the drive signal for fine vibration and the predetermined ratio are variably set according to an environmental temperature. The ink jet recording apparatus according to claim 6.

The length of the period in which the bit data for fine vibration is set so as to select the fine vibration drive signal and at least one of the predetermined ratio are variably set according to ink viscosity. The ink jet recording apparatus according to claim 6.

The ink jet recording apparatus according to claim 8, wherein the period for setting the fine vibration bit data is set to be longer as the elapsed time after the ink cartridge is mounted becomes longer.

The ink jet recording apparatus according to claim 8, wherein the predetermined ratio is set to be higher as the elapsed time after the ink cartridge is installed becomes longer.

At least one of the length of the period for setting the bit data for fine vibration and the predetermined ratio so as to select the drive signal for fine vibration is variably set according to the solid content concentration of the ink. The ink jet recording apparatus according to claim 2.

The ink jet recording apparatus according to claim 1, wherein the pressure generating element is a piezoelectric vibrator.

In an ink jet recording method of ejecting ink droplets from each nozzle by operating pressure generating elements provided corresponding to the plurality of nozzles,
Analyzing the operating state of each nozzle based on the input print data,
Select a predetermined pattern based on the analyzed operating state,
According to each ejection data for ejecting ink existing in the selected predetermined pattern, printout is performed by setting fine vibration bit data for fine vibration performed before each ejection data at a predetermined position. Dot pattern data for
When the fine vibration bit data is set, an ink jet recording method is characterized in that a drive signal for fine vibration that does not eject ink droplets is input to the pressure generating element.