摘要:
An ink jet printer is provided with a driving signal generating section (350) which generates a driving signal for driving a piezoelectric element (200), a residual vibration detecting section (356A), a selection section (352A) which selects whether to supply a driving signal to the piezoelectric element or to supply electromotive force of the piezoelectric element to the residual vibration detecting section, a control IC (29d) which includes the residual vibration detecting section, the selection section, and a connection terminal (x3) which connects the piezoelectric element, an input terminal (x1) to which the driving signal is supplied and an output terminal (x2) from which an output signal of the residual vibration detecting section is supplied, a first external wiring which is connected to the input terminal and through which the driving signal is supplied, and a second external wiring which is connected to the output terminal and through which the output signal of the residual vibration detecting section is supplied. A resistance value per unit length of the second external wiring is larger than a resistance value per unit length of the first external wiring.
摘要:
The present invention provides a technique that prevents a shift of a driving waveform due to accumulation of errors in a process of generating the driving waveform to drive driving elements on a print head. The technique of the present invention successively sums up a plurality of gradient data at a preset calculation period to give a result of summation and carries out digital-to-analog (D-A) conversion with regard to only specific upper columns in the result of summation in synchronism with the preset calculation period, so as to generate a driving waveform. Each gradient data represents a local gradient of the driving waveform and is stored in a memory. In the process of generating the driving waveform, the technique of the present invention corrects the result of summation to a preset value under a predetermined condition. One preferable embodiment clears specific lower bits in the result of summation in synchronism with a floor signal. Another preferable embodiment forcibly corrects the result of summation to an upper limit value or a lower limit value of a preset range when the result of summation exceeds the preset range. Such correction effectively cancels the potential effects of cumulative error on the driving waveform.
摘要:
Described is an ink jet print head which prevents the generation of ink mist by supplying a signal to a piezoelectric vibrator (9) which causes a pressure generating chamber (3) to expand by a volume smaller than the volume expanded to jet out an ink droplet, when the vibration of the meniscus generated after jetting out an ink droplet moves to the position closest to the pressure generating chamber (3). When the vibration of the meniscus generated after jetting out an ink droplet goes to the nozzle hole (2), the pressure generating chamber (3) is expanded again, to effectively attenuate the kinetic energy of the meniscus and to hold the meniscus at a position suitable for jetting out the next ink droplet.
摘要:
An increase in the width in the first direction of the head unit is controlled and deterioration in image quality is curbed as well. A liquid ejecting apparatus according to the invention is a liquid ejecting apparatus including: a head unit that has a plurality of heads along a first direction, in which a plurality of nozzles that eject a liquid onto a medium are lined up in the first direction, and that ejects the liquid while moving relative to the medium in a second direction, which intersects the first direction, the head unit having a width in the first direction that is greater than a width of the medium in the first direction, a movement mechanism that makes the head unit move relative to the medium a plurality of times alternately in the second direction and the first direction, and a control section that forms a raster line group by forming each raster line by making two or more different nozzles that are different eject the liquid, respectively while making the movement mechanism move the head unit relative to the medium a plurality of times alternately in the second direction and the first direction, makes the movement mechanism move the head unit relatively so that a total amount of movement of the head unit in the first direction when the head unit has moved relatively the plurality of times is less than an effective nozzle width of one of the heads in the first direction, and forms the raster line group so that a number of the raster lines formed by making the nozzles of only one of the heads eject the liquid is not greater than a number of the raster lines formed by making the nozzles of two or more of the heads eject the liquid.
摘要:
In accordance with the present invention, a printing method for printing an image onto a medium includes printing a correction pattern by ejecting ink from a plurality of nozzles moving in a predetermined movement direction and forming, in an intersecting direction intersecting the movement direction, a plurality of lines extending along the movement direction and constituted by a plurality of dots, measuring a darkness of the correction pattern line by line, and printing the image with a plurality of the lines formed in the intersecting direction, while correcting the darkness of each line in accordance with correction values each corresponding to the darkness of each of the measured lines.
摘要:
An increase in the width in the first direction of the head unit (40) is controlled and deterioration in image quality is curbed as well. A liquid ejecting apparatus according to the invention is a liquid ejecting apparatus including: a head unit (40) that has a plurality of heads (41) along a first direction, in which a plurality of nozzles that eject a liquid onto a medium are lined up in the first direction, and that ejects the liquid while moving relative to the medium (T) in a second direction, which intersects the first direction, the head unit having a width in the first direction that is greater than a width of the medium (T) in the first direction, a movement mechanism (30) that makes the head unit (40) move relative to the medium (T) a plurality of times alternately in the second direction and the first direction, and a control section that forms a raster line group by forming each raster line by making two or more different nozzles that are different eject the liquid, respectively while making the movement mechanism (30) move the head unit (40) relative to the medium (T) a plurality of times alternately in the second direction and the first direction, makes the movement mechanism (30) move the head unit relatively so that a total amount of movement of the head unit (40) in the first direction when the head unit (40) has moved relatively the plurality of times is less than an effective nozzle width of one of the heads (41) in the first direction, and forms the raster line group so that a number of the raster lines formed by making the nozzles of only one of the heads (41) eject the liquid is not greater than a number of the raster lines formed by making the nozzles of two or more of the heads (41) eject the liquid.
摘要:
The present invention provides a technique that prevents a shift of a driving waveform due to accumulation of errors in a process of generating the driving waveform to drive driving elements on a print head. The technique of the present invention successively sums up a plurality of gradient data at a preset calculation period to give a result of summation and carries out digital-to-analog (D-A) conversion with regard to only specific upper columns in the result of summation in synchronism with the preset calculation period, so as to generate a driving waveform. Each gradient data represents a local gradient of the driving waveform and is stored in a memory. In the process of generating the driving waveform, the technique of the present invention corrects the result of summation to a preset value under a predetermined condition. One preferable embodiment clears specific lower bits in the result of summation in synchronism with a floor signal. Another preferable embodiment forcibly corrects the result of summation to an upper limit value or a lower limit value of a preset range when the result of summation exceeds the preset range. Such correction effectively cancels the potential effects of cumulative error on the driving waveform.
摘要:
Described is an ink jet print head which prevents the generation of ink mist by supplying a signal to a piezoelectric vibrator (9) which causes a pressure generating chamber (3) to expand by a volume smaller than the volume expanded to jet out an ink droplet, when the vibration of the meniscus generated after jetting out an ink droplet moves to the position closest to the pressure generating chamber (3). When the vibration of the meniscus generated after jetting out an ink droplet goes to the nozzle hole (2), the pressure generating chamber (3) is expanded again, to effectively attenuate the kinetic energy of the meniscus and to hold the meniscus at a position suitable for jetting out the next ink droplet.
摘要:
An ink jet printer is provided with a driving signal generating section (350) which generates a driving signal for driving a piezoelectric element (200), a residual vibration detecting section (356A), a selection section (352A) which selects whether to supply a driving signal to the piezoelectric element or to supply electromotive force of the piezoelectric element to the residual vibration detecting section, a control IC (29d) which includes the residual vibration detecting section, the selection section, and a connection terminal (x3) which connects the piezoelectric element, an input terminal (x1) to which the driving signal is supplied and an output terminal (x2) from which an output signal of the residual vibration detecting section is supplied, a first external wiring which is connected to the input terminal and through which the driving signal is supplied, and a second external wiring which is connected to the output terminal and through which the output signal of the residual vibration detecting section is supplied. A resistance value per unit length of the second external wiring is larger than a resistance value per unit length of the first external wiring.