CN106457823B - The driving method and ink-jet recording apparatus of ink gun - Google Patents
The driving method and ink-jet recording apparatus of ink gun Download PDFInfo
- Publication number
- CN106457823B CN106457823B CN201580024427.8A CN201580024427A CN106457823B CN 106457823 B CN106457823 B CN 106457823B CN 201580024427 A CN201580024427 A CN 201580024427A CN 106457823 B CN106457823 B CN 106457823B
- Authority
- CN
- China
- Prior art keywords
- drive signal
- drop
- pulse
- discharged
- ink
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
- B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
- B41J2/04581—Control methods or devices therefor, e.g. driver circuits, control circuits controlling heads based on piezoelectric elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
- B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
- B41J2/04573—Timing; Delays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
- B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
- B41J2/04588—Control methods or devices therefor, e.g. driver circuits, control circuits using a specific waveform
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
- B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
- B41J2/04593—Dot-size modulation by changing the size of the drop
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
- B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
- B41J2/04595—Dot-size modulation by changing the number of drops per dot
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
- B41J2202/01—Embodiments of or processes related to ink-jet heads
- B41J2202/10—Finger type piezoelectric elements
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Ink Jet Recording Methods And Recording Media Thereof (AREA)
Abstract
Multiple drops being discharged in 1 pixel period and are formed on medium a little bigger even if the purpose of the present invention is to provide one kind,Also can inhibit to generate adjunct while inhibiting productivity to reduce,And the driving method and ink-jet recording apparatus of the ink gun of the image recording of high-quality can be carried out,The pressure for discharge is assigned to the indoor liquid of pressure by applying drive signal to pressure generating unit to make that drop be discharged from nozzle when drive signal include the 1st drive signal (PA) of discharge drop and the 2nd drive signal (PB) this at least two kinds of drive signal of big drop be discharged to relative low speeds compared with the 1st drive signal (PA),By applying N number of 2nd drive signal (PB) in 1 pixel period,At least finally apply the 1st drive signal (PA),To make drop be discharged from same nozzle,The pixel based on the point being made of drop is formed on medium,And,N is 1 or more integer.
Description
Technical field
The present invention relates to the driving method of ink gun and ink-jet recording apparatus, specifically, even if being related to one kind at 1
Multiple drops are discharged in pixel period and form the driving side for still being able to inhibit to generate appendicular ink gun a little louder on medium
Method and ink-jet recording apparatus.
Background technology
Known following method：Drop is discharged from the nozzle of ink gun and in the case where forming a little bigger on medium, at 1
Multiple drops are discharged from same nozzle and it is made to merge in circling in the air or overlappingly land on medium in pixel period.Root
According to this method, additionally it is possible to it is deep or light to show by the number of drops for selecting to be discharged in 1 pixel period, so also be used to show
Gray scale.
In the past, as the technology that multiple drops are discharged from same nozzle in 1 pixel period, there is Patent Documents 1 to 3 note
The technology of load.
In patent document 1, before describing the final driving pulse applied in 1 pixel period, according to gray scale
When applying 1 time or more initial driving pulse, makes the voltage value constant of each pulse, make the application time ratio of initial driving pulse most
Whole driving pulse is long or short, to while each drop amount for making to be discharged by each pulse is identical, make based on initial driving arteries and veins
The liquid drop speed of punching is slower than the liquid drop speed based on final driving pulse.
In patent document 2, the driving pulse of 1 corresponding with gray scale of application or more in 1 pixel period is described
When, make the voltage value constant of each driving pulse, makes the defeated of final driving pulse in maximum greyscale waveforms and other greyscale waveforms
Go out timing unanimously, and stopping period for specified interval is set between pixel period.
In patent document 3, it describes and generates multiple discharge pulse signals in 1 pixel period and for inhibiting ink
1 auxiliary pulse signal of water meniscus vibration selects discharge pulse number according to gray scale.About each discharge pulse
Signal, voltage value constant, but subsequent discharge pulse signal, make the time interval of pulse gradually closer to actuator
Natural period and it is elongated, to the drop that is discharged afterwards, keep liquid drop speed faster so that multiple drops merge in circling in the air.
In addition, in patent document 4, describing including different drive signal as the 1st~the 3rd drive signal
In a series of drive waveforms, the part of the 2nd drive signal is selected in 1 pixel period and droplet is discharged, selects the 1st, the 3rd
The part of drive signal and drip in being discharged, select the part of the 1st~the 3rd drive signal and big drop be discharged, to carry out gray scale chart
It is existing.
Patent document 1：Japanese Unexamined Patent Publication 2007-118278 bulletins
Patent document 2：Japanese Unexamined Patent Publication 2008-93950 bulletins
Patent document 3：Japanese Unexamined Patent Publication 2001-146011 bulletins
Patent document 4：Japanese Unexamined Patent Publication 2007-105936 bulletins
Invention content
In the case of forming point as big as possible on medium when multiple drops are discharged in 1 pixel period, need
From a large amount of drop as big as possible of same nozzle discharge in 1 pixel period.
But drop amount is bigger, or liquid drop speed is faster in the case where drop amount is big, then appendicular generation is more made
It is problematic.Adjunct refers to the small drop (droplet) formed in its behind dependency when drop (main drop) is discharged from nozzle,
It is likely to result in the reduction of image quality.
In patent document 1,3, make the drop amount phase for the multiple drops being discharged from same nozzle in 1 pixel period
Together.Therefore, if small drop is continuously discharged, that is, allow to inhibit adjunct, there are still following problems：It is big in order to be formed
Point needs that a large amount of drop is discharged in 1 pixel period, and productivity reduces.In addition, in the feelings that big drop is continuously discharged
Under condition, the drop being finally discharged is also big drop, so largely generating appendicular ask in the presence of due to the drop being finally discharged
Topic.
In patent document 2, although seeking by being reduced during the stopping of specified interval is arranged between pixel period
The influence of residual oscillation, but be still not enough to inhibit to generate adjunct.
In addition, in patent document 4, not referring to any about the appendicular content of inhibition generation.
Present inventor concentrates on studies and multiple drops is discharged and form point as big as possible on medium in 1 pixel period
Method, combine relatively large drop and relatively small drop and the pass of the liquid drop speed of studying them as a result, it has been found that passing through
It is and the timing of relatively small drop is discharged, big point can be formed on medium and can also inhibits to generate adjunct,
Complete the present invention.
In addition, when make the number of drops that is discharged in 1 pixel period change come in the case of carrying out expressing gradation, similarly
Ground discovery can inhibit to generate adjunct, complete the present invention.
Even if multiple drops are discharged and on medium that is, the issue of the present invention is to provide one kind in 1 pixel period
Formation is a little bigger, also can inhibit generation adjunct while inhibiting productivity to reduce and can carry out the image note of high-quality
The driving method and ink-jet recording apparatus of the ink gun of record.
In addition, the issue of the present invention is to provide a kind of number of drops by making to be discharged in 1 pixel period to change
When carrying out expressing gradation, can inhibit to generate adjunct while inhibiting productivity to reduce and high-quality can be carried out
The driving method and ink-jet recording apparatus of the ink gun of image recording.
Other projects of the present invention will be apparent from by following record.
At least one of to achieve the goals above, reflect the driving method of the ink gun of one aspect of the present invention
It has following structure.
A kind of driving method of ink gun is by pressure generating unit application drive signal to the indoor liquid of pressure
Body assigns the pressure for discharge to make the driving method of ink gun that drop is discharged from nozzle,
The drive signal includes at least following 2 kinds of drive signals：The 1st drive signal of drop is discharged and with the described 1st
The 2nd drive signal of big drop is discharged compared to relative low speeds for drive signal,
By applying N number of 2nd drive signal in 1 pixel period, at least finally applying the 1st driving letter
Number, to make drop be discharged from the same nozzle, the pixel based on the point being made of the drop is formed on medium, and
And the N is 1 or more integer.
At least one of to achieve the goals above, reflect the driving of other ink guns of one aspect of the present invention
Method has structure below.
A kind of driving method of ink gun is by pressure generating unit application drive signal to the indoor liquid of pressure
Body assigns the pressure for discharge come the driving method for the ink gun for making drop be discharged from nozzle, which is characterized in that
The drive signal includes at least following 2 kinds of drive signals：The 1st drive signal of drop is discharged and with the described 1st
The 2nd drive signal of big drop is discharged compared to relative low speeds for drive signal,
By applying N number of 2nd drive signal in 1 pixel period, at least finally applying the 1st driving letter
Number, to make drop be discharged from the same nozzle, the pixel based on the point being made of the drop is formed on medium, and
And according to image data, so that the N is changed by 0 or more integer and make point of different sizes on medium, carry out gray scale chart
It is existing.
At least one of to achieve the goals above, the ink-jet recording apparatus for reflecting one aspect of the present invention has
Structure below.
A kind of ink-jet recording apparatus, has：
Ink gun assigns the pressure for discharge to the indoor liquid of pressure by the driving of pressure generating unit, makes liquid
Drop is discharged from nozzle；And
Drive control unit, the drive signal of pressure generating unit described in output driving,
The drive signal includes at least following 2 kinds of drive signals：The 1st drive signal of drop is discharged and with the described 1st
The 2nd drive signal of big drop is discharged compared to relative low speeds for drive signal,
The drive control unit in 1 pixel period by applying N number of 2nd drive signal, at least last
Apply the 1st drive signal, to make drop be discharged from the same nozzle, is formed based on by the drop structure on medium
At point pixel, also, the N is 1 or more integer.
At least one of to achieve the goals above, reflect other ink-jet recording apparatus of one aspect of the present invention
With structure below.
A kind of ink-jet recording apparatus, has：
Ink gun assigns the pressure for discharge to the indoor liquid of pressure by the driving of pressure generating unit, makes liquid
Drop is discharged from nozzle；And
Drive control unit, the drive signal of pressure generating unit described in output driving,
The drive signal includes at least following 2 kinds of drive signals：The 1st drive signal of drop is discharged and with the described 1st
The 2nd drive signal of big drop is discharged compared to relative low speeds for drive signal,
The drive control unit in 1 pixel period by applying N number of 2nd drive signal, at least last
Apply the 1st drive signal, to make drop be discharged from the same nozzle, is formed based on by the drop structure on medium
At point pixel, also, according to image data, so that the N is changed by 0 or more integer and made on medium of different sizes
Point, carry out expressing gradation.
Description of the drawings
Fig. 1 is the schematic structural diagram for an example for showing the ink-jet recording apparatus of the present invention.
Fig. 2 is the figure for an example for showing ink gun, and (a) is the stereogram for being shown appearance with section, is (b) from side
The sectional view of observation.
Fig. 3 is the figure of an example of the driving method for illustrating the ink gun in the present invention.
Fig. 4 (a) is the figure for an example for illustrating the 1st drive signal, is (b) example for illustrating the 2nd drive signal
Figure.
Fig. 5 (a)~(c) is the figure for the discharging operation for illustrating ink gun.
Fig. 6 (a) is the concept map for the drop being discharged by the 1st drive signal, is arranged by the 2nd drive signal
The concept map of the drop gone out.
Fig. 7 (a) is the figure for another example for illustrating the 1st drive signal, is (b) another example for illustrating the 2nd drive signal
Figure
Fig. 8 (a) is the figure of an example of the state of circling in the air for illustrating drop, is (b) to show to be formed on medium therefrom
Point figure.
Fig. 9 (a) is the figure of another example for the state of circling in the air for illustrating drop, is (b) to show to be formed on medium therefrom
Point figure.
Figure 10 (a) is the figure of the yet another example for the state of circling in the air for illustrating drop, is (b) to show the shape on medium therefrom
At point figure.
Figure 11 is an example of the driving method of the ink gun in the case of illustrating to carry out expressing gradation in the present invention
Figure.
Figure 12 (a) is an example for illustrating only to apply in 1 pixel period the driving method of the 2nd drive signal
Figure (b) is the figure for illustrating to make an example of the different driving method of timing of the 1st drive signal in Fig. 3.
(symbol description)
1：Ink-jet recording apparatus；2：Conveying mechanism；21：Conveying roller；22：Conveying roller pair；23：Convey motor；3：Ink gun；
30：Channel substrate；31：Channel；32：Next door；321：Upper wall portions；322：Lower wall portion；33：Cover substrate；331：Common flow path；34：
Nozzle plate；341：Nozzle；35：Plate；351：Ink supply port；352：Ink supply conduit；4：Guide rail；5：Balladeur train；6：Flexible cable；
7：Medium；71：Recording surface；8：Drive control part；100：Drop；200：Drop；201：Small liquid ball；202：Big liquid ball；D：Point；
PA：1st drive signal；Pa1：Expansion pulse；Pa2：Shrink pulse；PWA1、PWA2：Pulse width；PWA3：During stopping；PB：
2nd drive signal；Pb1：1st expansion pulse；Pb2：1st shrinks pulse；Pb3：2nd expansion pulse；Pb4：2nd shrinks pulse；
PWB1~PWB4：Pulse width；T：Pixel period；TA：The drive cycle of 1st drive signal；TB：The driving of 2nd drive signal
Cycle T 1, T2：During stopping.
Specific implementation mode
Fig. 1 is the schematic structural diagram for an example for showing the ink-jet recording apparatus of the present invention.
In ink-jet recording apparatus 1, conveying mechanism 2 passes through the medium that the clamping of conveying roller pair 22 includes paper, plastic sheet, cloth etc.
7, it is conveyed by using Y-direction (sub-scanning direction) of the rotation for the conveying roller 21 that motor 23 carries out into figure is conveyed.It is conveying
Between roller 21 and conveying roller pair 22, it is provided with ink gun (hereinafter referred to as head) 3.First 3 so that nozzle surface side and medium 7 record
The facing mode in face 71 is equipped on balladeur train 5, via flexible cable 6, with the drive for constituting the drive control unit in the present invention
Dynamic control unit 8 is electrically connected.
Balladeur train 5 is arranged to, by driving unit (not shown), lead along what is set up in the range of the width direction of medium 7
Rail 4, the directions X-X ' (main scanning direction) in the figure substantially orthogonal with the sub-scanning direction of the conveying direction as medium 7
On can move back and forth.First 3 move in the recording surface of medium 7 71 on main scanning direction with the round-trip of balladeur train 5,
During the movement, according to image data, drop is discharged from nozzle and records ink jet image.
Fig. 2 is the figure for an example for showing first 3, and (a) is the stereogram that appearance is shown with section, is seen from side
The sectional view examined.
In first 3,30 be channel substrate.In channel substrate 30, it is disposed with the more of stria shape in an alternating fashion
A channel 31 and next door 32.On the upper surface of channel substrate 30, in a manner of blocking the top in all channels 31, it is provided with lid
Substrate 33.To the end joined nozzle plate 34 of channel substrate 30 and cover substrate 33.The one end in each channel 31 is via being formed in the spray
The nozzle 341 of mouth plate 34 is connected to outside.
The other end in each channel 31 is formed to gradually become shallow slot relative to channel substrate 30.The shape in cover substrate 33
At for the common common flow path 331 in each channel 31.The common flow path 331 is connected to each channel 31.Common flow path 331 is by plate 35
It blocks.Ink supply port 351 is formed in plate 35.Via the ink supply port 351, from ink supply conduit 352 to common stream
Ink is supplied in road 331 and each channel 31.
Next door 32 is made of piezoelectric elements such as PZT as electrical/mechanical converter unit.About the next door 32, instantiate
Pass through the example that the piezoelectric element being polarised to mutually opposite direction to upper wall portions 321 and lower wall portion 322 is formed.
But the part formed by piezoelectric element in next door 32 may also be only such as upper wall portions 321.It is alternately arranged setting next door
32 and channel 31, so 1 next door 32 is shared by its two adjacent channel 31,31.
Inner surface in channel 31 is respectively formed with driving electrodes (in Fig. 2 from the wall surface in two next doors 32,32 to bottom surface
In it is not shown).When the drive signal for applying assigned voltage to clipping 2 driving electrodes that next door 32 configures from drive control part 8
When, next door 32 occurs shear-deformable using the joint surface of upper wall portions 321 and lower wall portion 322 as boundary.When 2 adjacent next doors 32,
32 to mutual opposite direction occur it is shear-deformable when, expanded or received by the volume in the channel 31 that the next door 32,32 clips
Contracting generates pressure wave in inside.The pressure for discharge is assigned to the ink in channel 31 as a result,.
This 3 is the shearing mould for making the ink in channel 31 be discharged from nozzle 341 by next door 32 occurs shear-deformable
The head of formula type is preferred pattern in the present invention.It is surrounded by channel substrate 30, next door 32, cover substrate 33, nozzle plate 34 logical
Road 31 is an example of the balancing gate pit in the present invention, and the driving electrodes on next door 32 and its surface are that the pressure in the present invention occurs
One example of unit.
Multiple drops can be discharged from same nozzle 341 in 1 pixel period in drive control part 8, so can be at 1
Multiple drive signals are generated in pixel period.By the drive signal generated output to the end 3, and it is applied to and is formed in next door 32
Each driving electrodes.In addition, 1 pixel period refers to for by making the drop being discharged from nozzle land form base on medium
In the time interval of each pixel of point.
Fig. 3 is to illustrate to be used for by applying multiple drive signals in 1 pixel period in medium 7 in the present invention
Form the figure of an example of a little bigger driving method.Here, instantiating in 1 pixel period T the spray pair with discharge drop
Multiple drive signals that the driving electrodes in 341 corresponding channel 31 of mouth apply.
Multiple drive signals in the present invention include at least following 2 kinds of drive signals：The drivings of 1st drive signal PA and the 2nd
Signal PB.1st drive signal PA and the 2nd drive signal PB is the speed for the drop the being discharged accordingly letter different with drop amount
Number.The drop being discharged by the 2nd drive signal PB is relatively low compared to the drop by being discharged by the 1st drive signal PA
Speed, also, drop amount is larger.
In addition, the liquid drop speed in the present invention is to carry out image recognition to drop by using drop observation device and obtain
Being calculated by time and at this time position coordinates existing for drop from discharge.Specifically, being according to drop from leaving
What the distance that the position that 500 μm of nozzle face is circled in the air during 50 μ s calculated.Can pass through by the time from discharge
Make the discharge signal of ink gun and the stroboscope of observation synchronize calculate.In addition, the position coordinates of drop can be by flying
Xiang image carries out image procossing to calculate.
According to the driving method for the ink gun being used to form in a little bigger present invention, by applying in 1 pixel period T
N number of 2nd drive signal PB and 1 pixel period T at least finally apply the 1st drive signal PA, from same nozzle
The 341 multiple drops of discharge.At this point, by N is set as 1 or more integer, the point on medium 7 by being made of multiple drop
And form pixel.The multiple drops being discharged from same nozzle 341 in 1 pixel period T in circling in the air by merging, Neng Gou
Pixel is formed by drop is constituted made of 1 zoarium point on medium 7.In addition it is possible to make multiple drops to be overlapped
Mode land on medium 7, the point that is made up of the aggregate by multiple points forms pixel.
2nd drive signal PB is the driving letter being discharged compared to the relatively large drop of drop based on the 1st drive signal PA
Number, so by the signal of application 1 or more in 1 pixel period T, it is mainly a little bigger helpful to being formed.In addition, being based on
The drop of 2nd drive signal PB is relative low speeds compared to the drop based on the 1st drive signal PA, generated adjunct by
The drop being discharged after in same pixel period T captures, so the problem of will not causing the degree for making image quality reduce.
In the case of multiple drops are discharged in 1 pixel period T, the adjunct of leading drop is by same pixel
The drop being discharged after in cycle T captures, so according to the viewpoint of image quality, the liquid being finally discharged in 1 pixel period T
Incidental adjunct is dripped especially to throw into question.According to the present invention, it must finally apply the 1st driving in 1 pixel period T
The drop relatively small compared to the drop based on the 2nd drive signal PB is discharged in signal PA as a result, thus do not generate adjunct or
Person's adjunct is suppressed.
Therefore, it is possible to provide even if by applying the 1st drive signal PA and the 2nd drive signal in 1 pixel period T
PB forms a little bigger multiple drops are discharged on medium 7, can also inhibit to generate while inhibiting productivity to reduce attached
Object and can carry out high-quality image recording ink gun 3 driving method and ink-jet recording apparatus 1.
In figure 3, TA is the drive cycle of the 1st drive signal PA in 1 pixel period T, and TB is 1 pixel period T
The drive cycle of the 2nd interior drive signal PB.Here, instantiate in 1 pixel period T with subsequent drive signal it
Between be separated out as defined in the stop mode of period T1 apply 3 (N=3) the 2nd drive signal PB and from 1 the 1st finally applied
Drive signal PA application terminate to next 1 pixel period T beginning during be separated out as defined in stop period T2's
Example.
In addition, the number N of the 2nd drive signal PB is 1 or more integer, 3 of diagram are not limited to, however, N is 1 or more
Which value, last in 1 pixel period T must all apply the 1st drive signal PA.Therefore, no matter which of 1 or more N be
One value, all inhibits adjunct as described above.In addition, although it is not shown, no matter N is 1 or more which value, finally apply
1st drive signal PA applies in a manner of as the same timing in 1 pixel period T.
Next, using Fig. 4, illustrate the concrete structure of the 1st drive signal PA and the 2nd drive signal PB.Fig. 4 (a) shows
Go out the 1st drive signal PA, (b) shows the 2nd drive signal PB.But drive signal PA, PB shown in Fig. 4 are the present invention
In a preferred example, not by any restriction of example illustrated.
First, illustrate the structure of the 1st drive signal PA.
1st drive signal PA has the expansion pulse Pa1 for making the cubical expansion in channel 31 and shrinking after some time
And the contraction pulse Pa2 for making the volume in channel 31 shrink and expand after some time.
In the example shown in Fig. 4 (a), expansion pulse Pa1 is to rise from reference potential and decline after some time
To the pulse of reference potential.In addition, it is to decline and rise to after some time benchmark electricity from reference potential to shrink pulse Pa2
The pulse of position.In addition, reference potential is set as 0 current potential herein, but it is not particularly limited.
The driving voltage value (+Von) of expansion pulse Pa1 and the driving voltage value (- Voff) for shrinking pulse Pa2 are set
For | Von |:| Voff |=2:1.
In the example of the 1st drive signal PA, expansion pulse Pa1 failing edge terminal with shrink pulse Pa2's
Between the beginning of failing edge, it is provided with the period PWA3 that stops during reference potential is remained certain.It is intended that avoiding base
It is once changed to from the swelling state based on expansion pulse Pa1 in the volume of the relationship with aftermentioned 2nd drive signal PB, channel 31
Based on the contraction state for shrinking pulse Pa2, to which liquid drop speed becomes too fast, and the drop quantitative change of drop be discharged is avoided
It is too much.By adjusting the length of the period PWA3 that stops, can based on the liquid that is discharged according to aftermentioned 2nd drive signal PB
The relationship of drop is easily adjusted the speed and drop amount of the drop being discharged by the application of the 1st drive signal PA.Therefore,
The period PWA3 that stops is preferably provided in the 1st drive signal PA.
In addition, in the present invention, at least must finally apply 1 the 1st drive signal PA i.e. in 1 pixel period T
It can.Therefore, before not interfering the 1st drive signal PA finally applied in 1 pixel period T completely, in addition to the 2nd driving letter
Also apply 1 or more the 1st drive signal PA other than number PB.At this time, it is also possible to sometimes in 1 pixel period T initially applying
Add the 1st drive signal PA, but in this case, for example, it is preferable to by during the stopping of the 1st drive signal PA that will initially apply
PWA3 is set to the period PWA3 long that stops than the 1st drive signal PA finally applied, and the speed for the drop being initially discharged is made to become
It is slow to improve land.
In addition, the 1st drive signal PA is preferably the multiple drivings letter arranged in temporal sequence in 1 pixel period T
The drive signal for being used to form minimum drop in number.Thereby, it is possible to further increase to inhibit appendicular effect, and also
Landing positions can be inhibited to deviate.
In turn, according to further increase appendicular inhibition and landing positions offset inhibition viewpoint,
1st drive signal PA is preferably to be used to form liquid in the multiple drive signals arranged in temporal sequence in 1 pixel period T
The drive signal of drop minimum and the fast drop of liquid drop speed.
The 1st preferably rectangular waves of drive signal PA.That is, expansion pulse Pa1 and contraction pulse Pa2 are by square as shown in the figure
Shape wave is constituted.The head 3 of shear mode-type described in present embodiment being capable of applying relative to the drive signal being made of rectangular wave
Adding makes phase consistently generate pressure wave, so drop can be efficiently discharged, and can inhibit driving voltage lower.
No matter general discharge or not, all enemy 3 applies voltage always, so in order to inhibit first 3 fever and penetrate with making droplets stable
Go out, low driving voltage is important.
In addition, rectangular wave can be easily produced using simple digital circuit, so compared to using with inclination
The case where trapezoidal wave of wave, additionally it is possible to simplify circuit structure.
The pulse width PWA1 of expansion pulse Pa1 is preferably 0.8AL or more and 1.2AL hereinafter, shrinking the pulse of pulse Pa2
Width PWA2 is preferably 1.8AL or more and 2.2AL or less.Thereby, it is possible to drop is efficiently discharged.In addition, if during stopping
PWA3 becomes long, then is difficult to that the fast drop of drop of the drop speed ratio based on the 2nd drive signal PB is discharged, also, effect is discharged
Rate is greatly reduced, and it is advantageous to be adjusted in 1/4AL or less.
It is the abbreviation of Acoustic Length (sound path) in this AL, is the acoustic resonance period of the pressure wave in channel 31
1/2.About AL, the speed of circling in the air for the drop being discharged when driving electrodes are applied with the drive signal of rectangular wave is measured, is found out
The maximum pulse of speed of circling in the air of drop is wide when pulse width variation to make rectangular wave in the voltage value constant for making rectangular wave
Degree.
In addition, pulse refers to the rectangular wave of constant voltage peak value, 0V is being set as 0%, crest voltage is set as 100%
In the case of, pulse width is defined as between the rising edge 10% from the 0V of voltage and the failing edge from crest voltage 10%
Time.
In turn, it is all the 1/2 of AL that rectangular wave, which refers to rising time between the 10% of voltage and 90%, failing edge time,
Within, such waveform within preferably 1/4.
Next, the structure of the 2nd drive signal PB of explanation.
As the example of the 2nd drive signal PB, there is the cubical expansion for making channel 31 successively and receive after some time
1st expansion pulse Pb1 of contracting, the 1st contraction pulse Pb2 for making the volume in channel 31 shrink and expanding after some time, make
The cubical expansion in channel 31 and the 2nd expansion pulse Pb3 that shrinks after some time and the volume in channel 31 is made to shrink simultaneously
Shrink pulse Pb4 in the 2nd expanded after some time.
In the example shown in Fig. 4 (b), the 1st expansion pulse Pb1 be from reference potential rise and after some time under
It is down to the pulse of reference potential.1st contraction pulse Pb2 is to decline and rise to after some time benchmark electricity from reference potential
The pulse of position.2nd expansion pulse Pb3 is the pulse for rising and dropping to after some time reference potential from reference potential.
2nd contraction pulse Pb4 is the pulse for declining and rising to after some time reference potential from reference potential.In addition, herein
Also reference potential is set as 0 current potential, but be not particularly limited.
The driving voltage value (+Von) of 1st expansion pulse Pb1 and the 2nd expansion pulse Pb3 and the 1st shrink pulse Pb2 with
And the 2nd the driving voltage value (- Voff) of contraction pulse Pb4 be set to | Von |:| Voff |=2:1.
1st contraction pulse Pb2 is not separated out from the terminal of the failing edge of the 1st expansion pulse Pb1 stop during ground it is continuous under
Drop.In addition, the 2nd expansion pulse Pb3 is not separated out from the terminal of the rising edge of the 1st contraction pulse Pb2 on continuous during stopping
It rises.In turn, the 2nd contraction pulse Pb4 is not separated out from the terminal of the failing edge of the 2nd expansion pulse Pb3 stop during ground it is continuous under
Drop.
2nd drive signal PB is also according to the reason preferably rectangular wave same as the 1st drive signal PA.As shown,
1st expansion pulse Pb1, the 1st contraction pulse Pb2, the contractions of the 2nd expansion pulse Pb3 and the 2nd pulse Pb4 are made of rectangular wave.
The pulse width PWB1 of the 1st expansion pulse Pb1 in 2nd drive signal PB be preferably 0.4AL or more and 2.0AL with
Under, the pulse width PWB2 of the 1st contraction pulse Pb2 be preferably 0.4AL or more and 0.7AL hereinafter, the 2nd expansion pulse Pb3 arteries and veins
It is preferably 0.8AL or more and 1.2AL hereinafter, the 2nd pulse width PWB4 for shrinking pulse Pb4 is preferably 1.8AL to rush width PWB3
Above and 2.2AL or less.Thereby, it is possible to which big drop is discharged with short drive cycle, and liquid drop speed is also suppressed.Cause
This, can be discharged the big drop of drop amount compared to the drop relative low speeds based on the 1st drive signal PA.
In addition, according to the viewpoint for reducing the existing appendicular influence between multiple drops, the period T1 that stops is preferably
2AL is hereinafter, according to the influence of the pressure wave reverberation vibration in the channel 31 inhibited after drop discharge and make subsequent drop arrange
Go out stabilized viewpoint, the period T2 that stops is preferably 1.5AL or more.
Next, using Fig. 5, the head 3 when illustrating to apply the 1st drive signal PA and the 2nd drive signal PB shown in Fig. 4
Discharging operation.Fig. 5 shows one of the section obtained from cutting tip 3 on the direction orthogonal with the length direction in channel 31
Point.Here, being set as that drop is discharged from the channel 31B in the center in Fig. 5.In addition, Fig. 6 show apply the 1st drive signal PA with
And the concept map for the drop being discharged when the 2nd drive signal PB.
First, illustrate the discharging operation based on the 1st drive signal PA.
As shown in Fig. 5 (a), in driving electrodes 36A, 36B, 36C in mutually adjacent channel 31A, 31B, 31C
When any one does not apply drive signal, next door 32A, 32B, 32C, 32D become indeformable neutral condition.It will in addition, working as
When driving electrodes 36A and 36C are grounded and apply the expansion pulse Pa1 in the 1st drive signal PA to driving electrodes 36B, production
The electric field in the raw direction vertical with the polarization direction of piezoelectric element of next door 32B, 32C is constituted.Next door 32B, 32C such as Fig. 5 as a result,
(b) it mutually occurs bending and deformation outward shown in, the cubical expansion (Draw) of channel 31B.It is generated in the 31B of channel as a result, negative
Pressure, ink flow into.
Press pin in the 31B of channel inverts every 1AL, so if by expansion pulse Pa1 maintain 0.8AL or more and
1.2AL periods below are then reversed to positive pressure in the 31B of channel.When the application for periodically terminating expansion pulse Pa1 at this is returned
When being back to reference potential, next door 32B, 32C return to neutral condition (Release) shown in Fig. 5 (a).At this point, to channel 31B
Interior ink applies big pressure, and ink is moved to from the direction that nozzle 341 is forced out.
When neutral condition is maintained stop period PWA3 after driving electrodes 36B is applied shrink pulse Pa2 when, every
Wall 32B, 32C mutually occur bending and deformation inwardly as shown in Fig. 5 (c), and the volume of channel 31B shrinks (Reinforce).It is tied
Fruit further presses on the ink in the 31B of channel, to the ink moved from the direction that nozzle 341 is forced out by into one
Step extrudes.Later, the ink being forced out is broken, and 1 drop 100 is discharged as shown in Fig. 6 (a).
The drop 100 is the drop amount droplet smaller than the drop based on aftermentioned 2nd drive signal PB.In discharge drop
When 100, adjunct is not generated, or minute quantity is suppressed to generating.
Contraction state based on contraction pulse Pa2 is after it have passed through 1.8A or more and 2.2AL or less, in the 31B of channel
Pressure transition be timing return to original state.Next door 32B, 32C returns to the neutral condition of Fig. 5 (a) as a result,.
Next, discharging operation of the explanation based on the 2nd drive signal PB.
If driving electrodes 36A and 36C are grounded from neutral condition shown in Fig. 5 (a), and to driving electrodes
36B applies the 1st expansion pulse Pb1 in the 2nd drive signal PB, then next door 32B, 32C is mutually sent out outward as shown in Fig. 5 (b)
Raw flexural deformation, the cubical expansion of channel 31B.Negative pressure is generated in the 31B of channel as a result, ink flows into.
After the 1st expansion pulse Pb1 maintains 0.4AL or more and 2.0AL or less, the application knot of the 1st expansion pulse Pb1
Beam.Next door 32B, 32C shrinks from swelling state and returns to neutral condition as a result,.Then, when be not separated out stop during and then
Apply the 1st contraction pulse Pb2, next door 32B, 32C are immediately turned into contraction state shown in Fig. 5 (c) via neutral condition.At this point,
Pressure is applied to the ink in the 31B of channel, ink is extruded from nozzle 341 and is discharged as the 1st drop.
1st contraction pulse Pb2 is maintained 0.4AL or more and 0.7AL or less.Then, when be not separated out stop during and then
When applying the 2nd expansion pulse Pb3, next door 32B, 32C are expanded from contraction state, are immediately turned into shown in Fig. 5 (b) via neutral condition
Swelling state, negative pressure is generated in the channel 31.Therefore, the speed for the 1st drop being discharged before is suppressed.In addition,
Thus negative pressure is generated in the 31B of channel, ink again flows into.
It is changed into just in the 31B of channel after maintaining 0.8AL or more and 1.2AL or less about the 2nd expansion pulse Pb3
Pressure when, application terminates.Then, when be not separated out stop during and then apply the 2nd contraction pulse Pb4 when, next door 32B, 32C
It is shunk from swelling state, contraction state shown in Fig. 5 (c) is immediately turned into via neutral condition.At this point, to the ink in the 31B of channel
Water applies big pressure, the 1st drop of pulse Pb2 discharges is then shunk by the 1st expansion pulse Pb1 and the 1st, further
Ground largely extrudes ink, and the ink being forced out is crushed and the 2nd big drop of liquid drop speed is discharged immediately.
Then pass through the 1st expansion pulse Pb1 as shown in Fig. 6 (b) about the drop by being discharged by the 2nd drive signal PB
And the 1st shrink pulse Pb2 discharge small the 1st the 1st drop 201 of liquid drop speed, formed by the 2nd expansion pulse Pb3 with
And the 2nd shrink pulse Pb4 discharge big the 2nd the 2nd drop 202 of liquid drop speed.Therefore, discharge originally, formed the 1st liquid
The drop 200 that drop 201 is connected with the 2nd drop 202.1st drop 201 and the 2nd drop 202 are one in circling in the air after being just discharged
Body and form 1 big drop 200.
The drop 200 is the drop amount big drop bigger than the drop 100 being discharged by the 1st drive signal PA.But by
Zoarium is carried out in the 2nd big drop 202 of the 1st small drop 201 of liquid drop speed and liquid drop speed, so compared to from nozzle 341
The case where 1 big drop of identical drop amount is discharged, liquid drop speed is slack-off, and according to the present embodiment, speed ratio is driven by the 1st
The drop 100 for moving signal PA and being discharged is low.At this point, the liquid drop speed for the drop 100 being discharged by the 1st drive signal PA is preferred
It is adjusted to smaller than the liquid drop speed of the 2nd drop 202.The attached object amount of drop 200 depends on the liquid drop speed of the 2nd drop 202, leads to
It crosses and the liquid drop speed of drop 100 is adjusted to smaller than the liquid drop speed of the 2nd drop 202 based on the 2nd drive signal PB, can press down
The attached object amount of drop 100 processed.
In addition, the liquid drop speed for the drop 200 being discharged by the 2nd drive signal PB is the 1st drop 201 and the 2nd drop
The liquid drop speed of 202 states being integrally formed.
Contraction state based on the 2nd contraction pulse Pb4 is after it have passed through 1.8AL or more and 2.2AL or less, in channel
Pressure transition in 31B is that timing returns to original state.Next door 32B, 32C is expanded from contraction state as a result, in returning to
Vertical state.
Driving method according to Fig.3, is initially applied continuously in 3 the 2nd drive signals in 1 pixel period T
PB then finally applies 1 the 1st drive signal PA to which 3 big drops 200 be discharged from same nozzle 341, to discharge 1
A drop 100, so forming pixel by the point being made of 4 drops on medium 7.
In the present embodiment, it is contemplated to the drop 100 of 6pl (picoliters) be discharged by the 1st drive signal PA, by
2 drive signal PB and the example that the drop 200 of 10pl is discharged.It therefore, in figure 3, can be in 1 pixel period T, in medium
The big point by adding up to the drop of 36pl to constitute is formed on 7.
If it is assumed that the 1st drive signal PA is only continuously applied 4, even if then adjunct is suppressed, it is only able to be formed
By the point for adding up to the drop of 24pl to constitute.In addition, in order to form the point that the drop by 36pl is constituted, need in 1 pixel period T
6 the 1st drive signal PA are inside continuously applied, so productivity reduces.In addition, being only applied continuously in the 2nd drive signal PB's
In the case of, since the drop being finally discharged is also big drop, so worry generates adjunct.But as in the present invention, 1
The 2nd drive signal PB for applying 1 or more in a pixel period T, arranges more in temporal sequence in 1 pixel period T
The 1st drive signal PA must finally be applied in a drive signal, thereby while can be formed on medium 7 a little bigger but last
The drop 100 being made of minimum drop must be discharged, so while inhibiting productivity to reduce, also inhibit to generate attached
Object.
In addition, in general, by using by DRR (Draw-Release- same as the 1st drive signal PA
Reinforce) waveform constitute drive signal and extend its pulse width, big drop can also be discharged.But in the situation
Under, become macrocyclic drive signal, so a large amount of drop can not be discharged within the limited time in 1 pixel period T.
But the big drop 200 of relative low speeds can be discharged in the 2nd drive signal PB with the short period, so can be 1 pixel week
In the limited time in phase T, more drops are discharged, can correspondingly form the pixel being made of big point on medium 7.
In addition, the deformation in next door 32 is due to the electricity between 2 driving electrodes being arranged in a manner of clipping the next door 32
Caused by pressure difference.Therefore, in the case where being discharged from channel 31B shown in fig. 5 by the 1st drive signal PA, such as Fig. 7
(a) shown in, even if to the expansion pulse Pa1 of the driving electrodes 36B applications+Von in the channel 31B as passing away, to neighbour
The contraction pulse Pa2 of the driving electrodes 36A, 36C application+Voff of channel 31A, the 31C connect, also can similarly drive.
In addition, similarly, in the case where being discharged from channel 31B shown in fig. 5 by the 2nd drive signal PB, such as
Shown in Fig. 7 (b), even if to the 1st expansion pulse of the driving electrodes 36B applications+Von in the channel 31B as passing away
Pb1, the 2nd expansion pulse Pb3 shrink pulse to the 1st of the driving electrodes 36A, 36C application+Voff of adjacent channel 31A, 31C the
Pulse Pb4 is shunk in Pb2, the 2nd, also can similarly drive.
Using the 1st drive signal PA and the 2nd drive signal PB shown in Fig. 7 (a), (b), can only it lead to
It crosses positive voltage and constitutes each drive signal, so the structure of drive control part 8 can be simplified.
In the present invention, the diameter for the drop 100 being discharged by the 1st drive signal PA is preferably than the diameter of nozzle 341
It is small.The drop 100 smaller than the diameter of nozzle 341 by being set as diameter, can further increase adjunct inhibition.
Here, the diameter about nozzle, it is circular in the shape of the opening of the discharge direction front end of nozzle, is
Refer to its diameter, in the diameter of a circle that not to be circular refer in the case of being replaced into the identical circle of opening area.
In addition, the diameter about drop refers to its diameter in the case where drop is spherical shape, it be not the situation of spherical shape
Under, refer to the diameter of the ball in the case of being replaced into the identical ball of volume.
On the other hand, diameter of the diameter for the drop 200 being discharged by the 2nd drive signal PB preferably than nozzle 341 is big.
The drop 200 bigger than the diameter of nozzle 341 by being set as diameter, can form point as big as possible on medium 7.
In addition, the diameter for the drop 200 being discharged by the 2nd drive signal PB is the 1st drop 201 and the 2nd drop 202 1
Body and form the diameter in the state of 1 big drop.
Certainly, the diameter of the drop 100 being more preferably discharged by the 1st drive signal PA is smaller than the diameter of nozzle 341, simultaneously
And the diameter for the drop 200 being discharged by the 2nd drive signal PB is bigger than the diameter of nozzle 341.
In addition, by by the 1st drive signal PA by the drop amount of drop 100 that is discharged be set as MA, will be by the 2nd driving
When signal PB and the drop amount of drop 200 that is discharged are set as MB, preferably MA × 1.5≤MB.Thereby, it is possible to effectively inhibit
It is appendicular simultaneously, form the pixel by constituting a little louder as much as possible on medium 7.
But in general, in sharing the head 3 of shear mode-type in next door 32 by adjacent channel 31, in 1 channel
31 when carrying out the driving for discharge, and two adjacent channels 31,31 can not be discharged.It is thus known that making with alternate side
The head of independent driving type of the formula configured with the passing away that drop is discharged and the dummy channels that drop is not discharged.It is this first 3
In the case of the head of the independent driving type of sample, passing away there is a possibility that be discharged in all pixels cycle T, institute
It is continuous with the pixel period T for forming pixel sometimes.
At this point, the drive of the drive cycle TA and the 2nd drive signal PB about the 1st drive signal PA in 1 pixel period T
Dynamic cycle T B, in order to inhibit appendicular while show aftermentioned gray scale on medium 7, additionally it is possible to be set as TA=TB, but excellent
Choosing is set as TA >=TB.Big 200 relative low speeds of drop based on the 2nd drive signal PB, so by being set as TA >=TB, for example
Wish as when dense gray scale etc. in the case of forming point as big as possible, it can be in 1 pixel period T, in a short time
The largely big drop 200 based on the 2nd drive signal PB is made at high speed.
In addition, as shown in figure 3, the 1st driving that the driving electrodes about pair channel corresponding with same nozzle 341 31 apply
Signal PA and the 2nd respective expansion pulses of drive signal PB (expansion pulse Pa1, the 1st expansion pulse Pb1, the 2nd expansion pulse
Pb3), preferably wave crest is constant, also, the 1st driving applied about the driving electrodes in pair channel corresponding with same nozzle 341 31
Signal PA and the respective contraction pulses of the 2nd drive signal PB (shrink pulse Pa2, the 1st contraction pulse Pb2, the 2nd contraction pulse
Pb4), wave crest is it is also preferred that constant.It can make the voltage value of the expansion pulse of each drive signal PA, PB and shrink the voltage of pulse
Value is constant respectively, so the structure of drive control part 8 can be further simplified.
When the number N of the 2nd drive signal PB applied in 1 pixel period T is N >=2, believed by each 2nd driving
Number PB and the drop 200 that is discharged are either same speed, can also be different speed.
In fig. 8, as an example, will be believed by multiple 2nd drivings in the case of showing N=3 shown in Fig. 3
Drop 100,200 when number PB and each drop 200 for being discharged from same nozzle 341 are set as same speed pass through at any time fly
The vertical view of Xiang state and the point D thus formed on medium 7.
In the case where each drop 200 is set as same speed, as shown in Fig. 8 (a), in 1 pixel period T continuously
3 drops 200 of discharge circle in the air to constant speed respectively.Then, when the final drop 100 based on the 1st drive signal PA is discharged,
Drop 100 is than 200 higher speed of drop immediately in its discharge before, so catching up with and merging.In addition, the drop being discharged by
Air drag in circling in the air and slow down, further catch up with the drop 200 before it so merging drop and merge, to
In circling in the air, all drops 100,200 merge.As a result, on medium 7, formed shown in Fig. 8 (b) by being based on 1 liquid
The pixel that the point D of drop is constituted.All drops 100,200 land after consolidation, so no landing positions offset can be formed
High-precision point D.
In addition, the liquid drop speed of the drop 200 based on the 2nd drive signal PB can pass through the pulse of the 1st expansion pulse Pb1
Width PWB1 is adjusted.Therefore, make through the different situation of the liquid drop speed of each 2nd drive signal PB drops 200 being discharged
Under, it can be carried out by adjusting the pulse width PWB1 of the 1st expansion pulse Pb1.In the present embodiment, as the pulse
The preferred range of width PWB1 instantiates 0.4AL or more and 2.0AL ranges below, so adjusting pulse in the range
The length of width PWB1.
At this point, it is preferred that in 1 pixel period T, it is long from being short to according to the pulse width PWB1 of the 1st expansion pulse Pb1
Sequentially, apply the 2nd drive signal PB.As a result, about each drop 200 being discharged, the drop 200 being discharged afterwards, speed is got over
Soon, so wishing to keep each drop 200 effective in the case where in circling in the air reliably merging.
In fig.9, as an example, it is driven for by multiple 2 in the case of showing N=3 shown in Fig. 3
Signal PB and each drop 200 for being discharged from same nozzle 341 are so that the drop of the drop 200 that is discharged afterwards when then speed is faster
100,200 circle in the air state and the vertical view of the point D thus formed on medium 7 that pass through at any time.
In this case, as shown in Fig. 9 (a), 3 drops 200 being continuously discharged in 1 pixel period T are circling in the air
It is middle merging and formed merge drop, be finally based on the 1st drive signal PA final drop 100 catch up with merging drop and merges, thus
All drops 100,200 merge in circling in the air.As a result, on medium 7, the point based on 1 drop shown in Fig. 9 (b) is formed
D.In this case, all drops 100,200 are also to land after consolidation, so no landing positions offset can be formed
High-precision point D.
On the other hand, additionally it is possible in 1 pixel period T, according to the arteries and veins of the 1st expansion pulse Pb1 of the 2nd drive signal PB
Sequence, the i.e. liquid drop speeds of width PWB1 from long to short are rushed near slow sequence, apply the 2nd drive signal PB.
In Fig. 10, as an example, it is driven for by multiple 2 in the case of showing N=3 shown in Fig. 3
Dynamic signal PB and each drop 200 for being discharged from same nozzle 341 are so that liquid of the drop 200 being first discharged when then speed is faster
Circle in the air state and the vertical view of the point D thus formed on medium 7 that pass through at any time of drop 100,200.
In this case, as shown in Figure 10 (a), the drop 100 based on the 1st drive signal PA is discharged with before it
Drop 200 merge and formed and merge drop, in addition to this, as shown in Figure 10 (b), formation be overlapped on medium 7 by multiple points and
At the pixels that constitute of 1 point D.The reason for this is that the energy damage for the drop 100 that early stage after discharge is finally discharged
It loses.
About point D shown in the Figure 10 (b), as described later, by changing the drop being discharged in 1 pixel period T
It measures the use of (number of drops) to carry out expressing gradation and on the way, there is the worry that landing positions are slightly offset whenever drop amount difference,
But not big influence is caused to image quality.In addition, obtaining coating merely with a little bigger as the case where recording solid image
Amount with having no effect on the way.
Next, explanation carries out the case where expressing gradation in the present invention.
In the present invention, at least last to apply the 1st by 1 pixel period T, applying N number of 2nd drive signal PB
Drive signal PA, to which drop be discharged from same nozzle 341, the pixel that formation is made of drop on medium 7, also, according to
Image data makes the number N of the 2nd drive signal PB of application change by 0 or more integer, to make size not on medium 7
Same point forms the pixel of the point based on all size on medium 7, and thus, it is possible to carry out expressing gradation.
Thereby, it is possible to provide even if by making the variation of the number of drops that is discharged in 1 pixel period T carry out gray scale chart
Now, it can also inhibit to generate adjunct while inhibiting productivity to reduce, and landing positions can also be inhibited to deviate, energy
Enough carry out the driving method and ink-jet recording apparatus 1 of the ink gun 3 of the image recording of high-quality.In addition, only changing in 1 picture
The number N of the 2nd drive signal PB applied in plain cycle T, so being capable of simply representing gradation.
Figure 11 is shown carries out expressing gradation using the 1st drive signal PA and the 2nd drive signal PB described above
In the case of the present invention in driving method an example.Here, showing by making to apply in 1 pixel period T
The number of 2nd drive signal PB is changed to maximum 4 (N=4) to carry out from (the minimum ash of grade (Level) 0 from 0 (N=0)
Degree) to class 5 (maximum gray scale) this 6 stages expressing gradation example.In addition, grade 0 is not apply any drive signal
The case where.
Performance can be stored with each gray scale in advance with being mapped from grade 1 to class 5 in drive control part 8
Each drive signal group of gray scale.Drive control part 8 is recalled corresponding by selecting desired gray scale according to image data
Drive signal group applies to the end 3.
In the case where carrying out expressing gradation, other than not applying the grade 0 of drive signal completely, from grade 1 to
It further include the stage (N=0) for not applying the 2nd drive signal PB in class 5, however, in which ash from grade 1 to class 5
In degree, all in the last of 1 pixel period T, the 1st drive signal PA must be applied.Therefore, from grade 1 to the arbitrary of class 5
One gray scale, can all inhibit adjunct as described above.In addition, in any one gray scale from grade 1 to class 5, finally apply
The 1st drive signal PA added applies in a manner of as the same timing in 1 pixel period T.
In addition, also contemplating the drop 100 that 6pl is discharged by the 1st drive signal PA herein, pass through the 2nd drive signal
PB and the drop 200 that 10pl is discharged.Therefore, grade 1=6pl, grade 2=16pl, grade 3=26pl, class 4=36pl, etc.
Grade 5=46pl, can show wide gray scale in the state of ensuring minimum liquid measure (6pl) based on the 1st drive signal PA.
But change come in the case of carrying out expressing gradation in the number of drops that makes to be discharged in 1 pixel period T in this way,
The landing positions offset of each gray scale throws into question.The reason for this is that according to the timing that each drop being discharged merges, drop
Velocity variations.In particular, when by the 1st drive signal PA by the drop 100 that is discharged and by the 2nd drive signal PB by be discharged
Drop 200 loses the energy of drop 100, is impacted to liquid drop speed when merging in circling in the air.The reason for this is that compared to liquid
Drop 100, drop 200 are the drops of opposite bigger.Therefore, the case where 1 drop 100 is only discharged and other than drop 100
In the case of multiple drops 200 are also discharged, it is possible to which landing positions are slightly different.
The liquid drop speed of the drop 100 based on the 1st drive signal PA is set as VA, its drop amount is set as to MA, by base
When the liquid drop speed of the drop 200 of the 2nd drive signal PB is set as VB, its drop amount is set as MB, influence when merging relies on
In the ratio between amount of exercise of big drop and droplet (MA × VA)/(MB × VB), the influence between land is dependent on until medium 7
Gap (nozzle face of head 3 and the distance between the surface of medium 7) L.In addition, if the number N of the 2nd drive signal PB becomes more and becomes
At N >=3, then the final increased tendency of merging number is generated, so the problem of landing positions deviate is more notable compared with other.
Therefore, in the case that the number N of the 2nd drive signal PB applied in 1 pixel period T is N >=3, preferably
Until at least have left the position of (MA × VA)/(MB × VB) × L from nozzle, do not make based on being applied in 1 the last of pixel period T
The drop 100 of the 1st drive signal PA added and the formation of drop 200 based on the 2nd drive signal PB applied before it
Merge drop.That is, drop 100 and drop 200 close after more than the position for having left (MA × VA)/(MB × VB) × L from nozzle
And it or lands in an overlapping manner on medium 7.
Thereby, it is possible to inhibit the landing positions of each gray scale to deviate.Alternatively, it is also possible to avoid unnecessarily increasing at 1
The speed of the drop 100 being finally discharged in pixel period T, so generation adjunct can also be further suppressed.
In the above description, it as first 3, instantiates the next door 32 between making adjacent channel 31,31 and shearing change occurs
The head of shape is set as the pressure generating unit being made of piezoelectric elements such as PZT simultaneously but it is also possible to be by the upper wall in channel or lower wall
Make the upper wall or lower wall that shear-deformable head occur.
In addition, the ink gun in the present invention is not limited to shear mode-type completely.For example, it can be formed by oscillating plate
A wall surface and the pressure generating unit by being made of piezoelectric elements such as PZT for balancing gate pit makes the vibration panel vibration come to balancing gate pit
Interior ink assigns the ink gun of the type of the pressure for discharge.
Embodiment
Hereinafter, illustrate the embodiment of the present invention, but the present invention is not limited to the embodiments.
(embodiment 1)
Prepare the ink gun (diameter=24 μm of nozzle, AL=3.7 μ s) of shear mode-type shown in Fig. 2.As ink,
The ink of UV constrictive types is used at 40 DEG C.The viscosity of ink at this time is 0.01Pas.As medium, using ink-jet paper,
Gap L between dielectric surface and nozzle face is set as 1.5mm.
As the 1st drive waveforms, using the 1st drive waveforms PA of rectangular wave shown in Fig. 4 (a), as the 2nd driving wave
Shape uses the 2nd drive waveforms PB of rectangular wave shown in Fig. 4 (b).Each pulse width and drive cycle are as described below.
<1st drive waveforms PA>
The pulse width PWA1=3.7 μ s (1AL) of expansion pulse Pa1
Shrink the pulse width PWA2=7.4 μ s (2AL) of pulse Pa2
Drive cycle TA=26 μ s (7AL)
In addition, in expansion pulse Pa1 and between shrinking pulse Pa2, it is provided with stopping period for 0.5 μ s (1/4AL or less)
PWA3。
<2nd drive waveforms PB>
The pulse width PWB1=2.4 μ s (0.65AL) of 1st expansion pulse Pb1
1st shrinks the pulse width PWB2=1.8 μ s (0.5AL) of pulse Pb2
The pulse width PWB3=3.7 μ s (1AL) of 2nd expansion pulse Pb3
2nd shrinks the pulse width PWB4=7.4 μ s (2AL) of pulse Pb4
Drive cycle TB=18.5 μ s (5AL)
The reference potential of 1st drive signal PA and the 2nd drive signal PB is set as 0 current potential, expansion pulse (Pa1, Pb1,
Pb3 voltage value (| Von |)) is 11V, shrink pulse (Pa2, Pb2, Pb4) voltage value (| Voff |) it is constant be 5.5V.
In the same manner as Fig. 3, the number N of the 2nd drive signal PB in 1 pixel period T is set as N=3, finally applies 1
3 big drop and 1 droplet is continuously discharged in a 1st drive signal PA.
By the 1st drive signal PA by the liquid drop speed of drop that is discharged is 6m/s, by the 2nd drive signal PB by be discharged
3 drops each liquid drop speed be 5m/s, all it is identical.In addition, 1 drop being discharged by the 1st drive signal PA
Drop amount is 6pl (22.5 μm of diameter), by the 2nd drive signal PB by the drop amount of 3 drops that is discharged is 10pl (straight respectively
26.5 μm of diameter).
If generating adjunct in the drop being discharged, droplet caused by being dripped by adjunct is formed around point.
Therefore, microscope observation is carried out to the point on medium to be commented according to benchmark below about appendicular generation situation
Valence.Table 1 shows its result.
◎：Do not generate adjunct completely.
○：Although being slightly to generate adjunct but do not have influential grade completely on image quality.
△：It is the grade slightly impacted to image quality due to adjunct.
×：It is the grade for generating a large amount of adjunct and being impacted to image quality.
In addition, microscope observation is carried out to the point formed on medium therefrom, the generation shape about landing positions offset
Condition is evaluated according to benchmark below.Table 1 shows its result.
◎：It is deviated completely without landing positions and forms high-precision pixel.
○：Although being slightly to have assured result position offset but not having image quality completely influential grade.
△：It is the grade for having assured result position offset and slightly being impacted to image quality.
×：It is the grade that big landing positions offset occurs and is impacted to image quality.
(comparative example 1)
As shown in Figure 12 (a), do not apply the 1st drive signal PA in 1 pixel period T, only connects the 2nd drive signal PB
Apply 4 continuously, it is in addition to this, same as Example 1, it similarly has rated appendicular generation situation and landing positions is inclined
It moves.Table 1 shows its result.
(comparative example 2)
As shown in Figure 12 (b), 1 before putting on the timing for applying the 1st drive signal PA in 1 pixel period T, finally
Apply the 2nd drive signal PB, it is in addition to this, same as Example 1, similarly have rated appendicular generation situation and dropping place
Set the situation occurred of offset.Table 1 shows its result.
(comparative example 3)
The period PWA3 that stops between expansion pulse Pa1 in 1st drive signal PA and contraction pulse Pa2 is set as 1.2 μ
S (1/4AL or more), it is in addition to this, same as Example 1, it similarly has rated appendicular generation situation and landing positions is inclined
The situation occurred of shifting.
At this point, the drop being finally discharged is smaller than the drop by being discharged by the 2nd drive signal PB similarly to Example 1
Drop (6pl), but be set to by the period PWA3 that will stop longer, liquid drop speed becomes 4.5m/s, than passing through the 2nd driving letter
Number PB and the drop that is discharged is slow.Table 1 shows its result.
(embodiment 2)
By being set as the pulse PWA1=5.6 μ s (1.5AL) of the expansion pulse Pa1 in the 1st drive signal PA, shrinking pulse
The pulse width PWA=11.2 μ s (3AL) of Pa2, to which the drop amount of 1 drop based on the 1st drive signal PA is set as 8pl
(25 μm of diameter), and it is set as the diameter drop bigger than nozzle diameter (24 μm), it is in addition to this, same as Example 1, similarly evaluate
Appendicular generation situation and the situation occurred of landing positions offset.Table 1 shows its result.
(embodiment 3)
By by each pulse width PWB1 of the 1st expansion pulse Pb1 in 3 the 2nd drive waveforms PB according in 1 pixel
The sequence applied in cycle T is set as 2.2 μ s, 2.4 μ s, 2.6 μ s, and the drop sent out afterwards then makes liquid drop speed faster, except this with
Outside, same as Example 1, similarly have rated the situation occurred of appendicular generation situation and landing positions offset.Table 1 shows
Go out its result.
In addition, each liquid drop speed for the drop being discharged by 3 the 2nd drive signal PB be successively 4.5m/s, 5.0m/s,
5.5m/s.In addition, each drop amount for the drop being discharged by 3 the 2nd drive signal PB be successively 9.5pl (26 μm of diameter),
10pl (26.5 μm of diameter), 10.5pl (26 μm of diameter).
(embodiment 4)
By by each pulse width PWB1 of the 1st expansion pulse Pb1 in 3 the 2nd drive waveforms PB according in 1 pixel
The sequence applied in cycle T is set as 2.6 μ s, 2.4 μ s, 2.2 μ s, and the drop sent out afterwards then makes liquid drop speed slower, except this with
Outside, same as Example 1, similarly have rated the situation occurred of appendicular generation situation and landing positions offset.Table 1 shows
Go out its result.
In addition, each liquid drop speed for the drop being discharged by 3 the 2nd drive signal PB be successively 5.5m/s, 5.0m/s,
4.5m/s.In addition, each drop amount for the drop being discharged by 3 the 2nd drive signal PB be successively 10.5pl (27 μm of diameter),
10pl (26.5 μm of diameter), 9.5pl (26 μm of diameter).
(embodiment 5)
By in embodiment 3 the case where the number N of the 2nd drive signal PB is set as N=3 as maximum gray scale, Jin Erli
Implement gray scale driving with making the number N in 1 pixel period T reduce one by one and being set as 4 grades of N=2, N=1, N=0,
Carry out the appendicular confirmation experiment of the point of the landing positions offset and each gray scale between gray scale.Table 1 shows its result.
In the present embodiment, drop amount MA=6pl, its liquid drop speed VA=6m/ of the drop based on the 1st drive signal PA
S, drop amount MB=10.5pl, its liquid drop speed VB=5.5m/s, dielectric surface and the spray of the drop based on the 2nd drive signal PB
Gap L=1.5mm between mouth face, so (L × MA × VA)/(MB × VB) is 0.94mm.
The result observed by drop observation device, it is thus identified that based on finally applied in 1 pixel period T
The drop of 1 drive signal PA and drop based on the 2nd drive signal PB applied before it have left from nozzle
The position of 0.94mm does not form merging drop.
Table 1 shows the result of adjunct and landing positions offset.In the present embodiment, the land between gray scale are not observed
Position offset obtains good image.
[table 1]
Claims (36)
1. a kind of driving method of ink gun is by pressure generating unit application drive signal to the indoor liquid of pressure
The pressure for discharge is assigned come the driving method for the ink gun for making drop be discharged from nozzle, which is characterized in that
The drive signal includes at least following 2 kinds of drive signals：The 1st drive signal of drop is discharged and is driven with the described 1st
The 2nd drive signal of big drop is discharged compared to relative low speeds for signal,
By applying N number of 2nd drive signal in 1 pixel period, at least finally applying the 1st drive signal,
To make drop be discharged from the same nozzle, the pixel based on the point being made of the drop, also, institute are formed on medium
The integer that N is 1 or more is stated,
The pressure generating unit makes the volume of the balancing gate pit expand or shrink by driving,
1st drive signal and the 2nd drive signal respectively include making the cubical expansion of the balancing gate pit and certain
The expansion pulse of the after-contraction of time and the contraction pulse for making the volume of the balancing gate pit shrink and expand after some time,
The 1st drive signal and the 2nd driving that pair pressure generating unit corresponding with the same nozzle applies are believed
The wave crest of number respective expansion pulse is constant, also, pair pressure generating unit corresponding with the same nozzle is applied
The 1st drive signal added and the respective wave crest for shrinking pulse of the 2nd drive signal are constant,
1st drive signal has the expansion pulse, the contraction pulse and the connection expansion pulse and the receipts
Stopping period between vena contracta punching,
The pulse width of the expansion pulse in 1st drive signal is 0.8AL or more and 1.2AL or less, wherein AL is
The 1/2 of the acoustic resonance period of pressure wave in the balancing gate pit,
The pulse width for shrinking pulse be 1.8AL or more and 2.2AL hereinafter,
The period of stopping is 1/4AL or less.
2. a kind of driving method of ink gun is by pressure generating unit application drive signal to the indoor liquid of pressure
The pressure for discharge is assigned come the driving method for the ink gun for making drop be discharged from nozzle, which is characterized in that
The drive signal includes at least following 2 kinds of drive signals：The 1st drive signal of drop is discharged and is driven with the described 1st
The 2nd drive signal of big drop is discharged compared to relative low speeds for signal,
By applying N number of 2nd drive signal in 1 pixel period, at least finally applying the 1st drive signal,
To make drop be discharged from the same nozzle, the pixel based on the point being made of the drop, also, institute are formed on medium
The integer that N is 1 or more is stated,
The pressure generating unit makes the volume of the balancing gate pit expand or shrink by driving,
1st drive signal and the 2nd drive signal respectively include making the cubical expansion of the balancing gate pit and certain
The expansion pulse of the after-contraction of time and the contraction pulse for making the volume of the balancing gate pit shrink and expand after some time,
The 1st drive signal and the 2nd driving that pair pressure generating unit corresponding with the same nozzle applies are believed
The wave crest of number respective expansion pulse is constant, also, pair pressure generating unit corresponding with the same nozzle is applied
The 1st drive signal added and the respective wave crest for shrinking pulse of the 2nd drive signal are constant,
2nd drive signal has the 1st expansion pulse being made of the expansion pulse, by described according to time series sequence
It shrinks the pulse is constituted the 1st and shrinks pulse, the 2nd expansion pulse being made of the expansion pulse and by the contraction pulse structure
At the 2nd shrink pulse.
3. the driving method of ink gun according to claim 1 or 2, which is characterized in that
Diameter by the drop that the 1st drive signal is discharged is smaller than the diameter of the nozzle.
4. the driving method of ink gun according to claim 1 or 2, which is characterized in that
Diameter by the drop that the 2nd drive signal is discharged is bigger than the diameter of the nozzle.
5. the driving method of ink gun according to claim 1 or 2, which is characterized in that
When the drive cycle of the 1st drive signal to be set as TA, the drive cycle of the 2nd drive signal be set as TB,
TA≥TB。
6. the driving method of ink gun according to claim 1 or 2, which is characterized in that
By being set as MA by the drop amount for the drop being discharged by the 1st drive signal, will be by the 2nd drive signal
When the drop amount of the drop of discharge is set as MB, MA × 1.5≤MB.
7. the driving method of ink gun according to claim 1 or 2, which is characterized in that
1st drive signal and the 2nd drive signal are all rectangular waves.
8. the driving method of ink gun according to claim 1 or 2, which is characterized in that
1st drive signal is being used to form in the multiple drive signals arranged in temporal sequence in 1 pixel period
The drive signal of minimum drop.
9. the driving method of ink gun according to claim 2, which is characterized in that
The pulse width of the 1st expansion pulse in 2nd drive signal is 0.4AL or more and 2.0AL or less, wherein
AL is the 1/2 of the acoustic resonance period of the pressure wave in the balancing gate pit,
The pulse width of the 1st contraction pulse be 0.4AL or more and 0.7AL hereinafter,
The pulse width of 2nd expansion pulse be 0.8AL or more and 1.2AL hereinafter,
Described 2nd pulse width for shrinking pulse is 1.8AL or more and 2.2AL or less.
10. the driving method of ink gun according to claim 9, which is characterized in that
In N >=2, the pulse of the 1st expansion pulse of N number of 2nd drive signal applied in 1 pixel period is wide
It spends respectively different.
11. the driving method of ink gun according to claim 10, which is characterized in that
In 1 pixel period, applied from long sequence is short to according to the pulse width of the 1st expansion pulse.
12. a kind of driving method of ink gun is by pressure generating unit application drive signal to the indoor liquid of pressure
Body assigns the pressure for discharge come the driving method for the ink gun for making drop be discharged from nozzle, which is characterized in that
The drive signal includes at least following 2 kinds of drive signals：The 1st drive signal of drop is discharged and is driven with the described 1st
The 2nd drive signal of big drop is discharged compared to relative low speeds for signal,
By applying N number of 2nd drive signal in 1 pixel period, at least finally applying the 1st drive signal,
To make drop be discharged from the same nozzle, the pixel based on the point being made of the drop, also, root are formed on medium
According to image data, so that the N is changed by 0 or more integer and makes point of different sizes on medium, carry out expressing gradation,
L is set as at a distance from by the nozzle face of the ink gun between the medium, by the liquid based on the 1st drive signal
Drop speed is set as VA, drop amount is set as to MA, the liquid drop speed based on the 2nd drive signal is set as VB, sets drop amount
For MB when,
In the case of N >=3, until at least having left the position of (L × MA × VA)/(MB × VB) from the nozzle, it is based on institute
It states the drop of the 1st drive signal and the drop based on the 2nd drive signal before it does not form merging drop.
13. the driving method of ink gun according to claim 12, which is characterized in that
Diameter by the drop that the 1st drive signal is discharged is smaller than the diameter of the nozzle.
14. the driving method of ink gun according to claim 12, which is characterized in that
Diameter by the drop that the 2nd drive signal is discharged is bigger than the diameter of the nozzle.
15. the driving method of ink gun according to claim 12, which is characterized in that
When the drive cycle of the 1st drive signal to be set as TA, the drive cycle of the 2nd drive signal be set as TB,
TA≥TB。
16. the driving method of ink gun according to claim 12, which is characterized in that
By being set as MA by the drop amount for the drop being discharged by the 1st drive signal, will be by the 2nd drive signal
When the drop amount of the drop of discharge is set as MB, MA × 1.5≤MB.
17. the driving method of ink gun according to claim 12, which is characterized in that
1st drive signal and the 2nd drive signal are all rectangular waves.
18. the driving method of ink gun according to claim 12, which is characterized in that
1st drive signal is being used to form in the multiple drive signals arranged in temporal sequence in 1 pixel period
The drive signal of minimum drop.
19. a kind of ink-jet recording apparatus, has：
Ink gun assigns the pressure for discharge by the driving of pressure generating unit to the indoor liquid of pressure, make drop from
Nozzle is discharged；And
Drive control unit, the drive signal of pressure generating unit described in output driving,
The ink-jet recording apparatus is characterized in that,
The drive signal includes at least following 2 kinds of drive signals：The 1st drive signal of drop is discharged and is driven with the described 1st
The 2nd drive signal of big drop is discharged compared to relative low speeds for signal,
The drive control unit is at least applied finally by applying N number of 2nd drive signal in 1 pixel period
1st drive signal is formed on medium to make drop be discharged from the same nozzle based on being made of the drop
The pixel of point, also, the N is 1 or more integer,
The pressure generating unit makes the volume of the balancing gate pit expand or shrink by driving,
1st drive signal and the 2nd drive signal respectively include making the cubical expansion of the balancing gate pit and certain
The expansion pulse of the after-contraction of time and the contraction pulse for making the volume of the balancing gate pit shrink and expand after some time,
The 1st drive signal and the 2nd driving that pair pressure generating unit corresponding with the same nozzle applies are believed
The wave crest of number respective expansion pulse is constant, also, pair pressure generating unit corresponding with the same nozzle is applied
The 1st drive signal added and the respective wave crest for shrinking pulse of the 2nd drive signal are constant,
1st drive signal has the expansion pulse, the contraction pulse and the connection expansion pulse and the receipts
Stopping period between vena contracta punching,
The pulse width of the expansion pulse in 1st drive signal is 0.8AL or more and 1.2AL or less, wherein AL is
The 1/2 of the acoustic resonance period of pressure wave in the balancing gate pit,
The pulse width for shrinking pulse be 1.8AL or more and 2.2AL hereinafter,
The period of stopping is 1/4AL or less.
20. a kind of ink-jet recording apparatus, has：
Ink gun assigns the pressure for discharge by the driving of pressure generating unit to the indoor liquid of pressure, make drop from
Nozzle is discharged；And
Drive control unit, the drive signal of pressure generating unit described in output driving,
The ink-jet recording apparatus is characterized in that,
The drive signal includes at least following 2 kinds of drive signals：The 1st drive signal of drop is discharged and is driven with the described 1st
The 2nd drive signal of big drop is discharged compared to relative low speeds for signal,
The drive control unit is at least applied finally by applying N number of 2nd drive signal in 1 pixel period
1st drive signal is formed on medium to make drop be discharged from the same nozzle based on being made of the drop
The pixel of point, also, the N is 1 or more integer,
The pressure generating unit makes the volume of the balancing gate pit expand or shrink by driving,
1st drive signal and the 2nd drive signal respectively include making the cubical expansion of the balancing gate pit and certain
The expansion pulse of the after-contraction of time and the contraction pulse for making the volume of the balancing gate pit shrink and expand after some time,
The 1st drive signal and the 2nd driving that pair pressure generating unit corresponding with the same nozzle applies are believed
The wave crest of number respective expansion pulse is constant, also, pair pressure generating unit corresponding with the same nozzle is applied
The 1st drive signal added and the respective wave crest for shrinking pulse of the 2nd drive signal are constant,
2nd drive signal there is the 1st expansion pulse being made of the expansion pulse, be made of the contraction pulse the
1 contraction pulse, the 2nd expansion pulse being made of the expansion pulse and the 2nd contraction pulse being made of the contraction pulse.
21. according to the ink-jet recording apparatus described in claim 19 or 20, which is characterized in that
Diameter by the drop that the 1st drive signal is discharged is smaller than the diameter of the nozzle.
22. according to the ink-jet recording apparatus described in claim 19 or 20, which is characterized in that
Diameter by the drop that the 2nd drive signal is discharged is bigger than the diameter of the nozzle.
23. according to the ink-jet recording apparatus described in claim 19 or 20, which is characterized in that
When the drive cycle of the 1st drive signal to be set as TA, the drive cycle of the 2nd drive signal be set as TB,
TA≥TB。
24. according to the ink-jet recording apparatus described in claim 19 or 20, which is characterized in that
By being set as MA by the drop amount for the drop being discharged by the 1st drive signal, will be by the 2nd drive signal
When the drop amount of the drop of discharge is set as MB, MA × 1.5≤MB.
25. according to the ink-jet recording apparatus described in claim 19 or 20, which is characterized in that
1st drive signal and the 2nd drive signal are all rectangular waves.
26. according to the ink-jet recording apparatus described in claim 19 or 20, which is characterized in that
1st drive signal is being used to form in the multiple drive signals arranged in temporal sequence in 1 pixel period
The drive signal of minimum drop.
27. ink-jet recording apparatus according to claim 20, which is characterized in that
The pulse width of the 1st expansion pulse in 2nd drive signal is 0.4AL or more and 2.0AL or less, wherein
AL is the 1/2 of the acoustic resonance period of the pressure wave in the balancing gate pit,
The pulse width of the 1st contraction pulse be 0.4AL or more and 0.7AL hereinafter,
The pulse width of 2nd expansion pulse be 0.8AL or more and 1.2AL hereinafter,
Described 2nd pulse width for shrinking pulse is 1.8AL or more and 2.2AL or less.
28. ink-jet recording apparatus according to claim 27, which is characterized in that
In N >=2, the pulse of the 1st expansion pulse of N number of 2nd drive signal applied in 1 pixel period is wide
It spends respectively different.
29. ink-jet recording apparatus according to claim 28, which is characterized in that
In 1 pixel period, applied from long sequence is short to according to the pulse width of the 1st expansion pulse.
30. a kind of ink-jet recording apparatus, has：
Ink gun assigns the pressure for discharge by the driving of pressure generating unit to the indoor liquid of pressure, make drop from
Nozzle is discharged；And
Drive control unit, the drive signal of pressure generating unit described in output driving,
The ink-jet recording apparatus is characterized in that,
The drive signal includes at least following 2 kinds of drive signals：The 1st drive signal of drop is discharged and is driven with the described 1st
The 2nd drive signal of big drop is discharged compared to relative low speeds for signal,
The drive control unit is at least applied finally by applying N number of 2nd drive signal in 1 pixel period
1st drive signal is formed on medium to make drop be discharged from the same nozzle based on being made of the drop
The pixel of point, also, according to image data, so that the N is changed by 0 or more integer and made on medium of different sizes
Point carries out expressing gradation,
L is set as at a distance from by the nozzle face of the ink gun between the medium, by the liquid based on the 1st drive signal
Drop speed is set as VA, drop amount is set as to MA, the liquid drop speed based on the 2nd drive signal is set as VB, sets drop amount
For MB when,
In the case of N >=3, until at least having left the position of (L × MA × VA)/(MB × VB) from the nozzle, it is based on institute
It states the drop of the 1st drive signal and the drop based on the 2nd drive signal before it does not form merging drop.
31. ink-jet recording apparatus according to claim 30, which is characterized in that
Diameter by the drop that the 1st drive signal is discharged is smaller than the diameter of the nozzle.
32. ink-jet recording apparatus according to claim 30, which is characterized in that
Diameter by the drop that the 2nd drive signal is discharged is bigger than the diameter of the nozzle.
33. ink-jet recording apparatus according to claim 30, which is characterized in that
When the drive cycle of the 1st drive signal to be set as TA, the drive cycle of the 2nd drive signal be set as TB,
TA≥TB。
34. ink-jet recording apparatus according to claim 30, which is characterized in that
By being set as MA by the drop amount for the drop being discharged by the 1st drive signal, will be by the 2nd drive signal
When the drop amount of the drop of discharge is set as MB, MA × 1.5≤MB.
35. ink-jet recording apparatus according to claim 30, which is characterized in that
1st drive signal and the 2nd drive signal are all rectangular waves.
36. ink-jet recording apparatus according to claim 30, which is characterized in that
1st drive signal is being used to form in the multiple drive signals arranged in temporal sequence in 1 pixel period
The drive signal of minimum drop.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-073970 | 2014-03-31 | ||
| JP2014073970 | 2014-03-31 | ||
| PCT/JP2015/060018 WO2015152186A1 (en) | 2014-03-31 | 2015-03-30 | Inkjet head driving method and inkjet printing apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106457823A CN106457823A (en) | 2017-02-22 |
| CN106457823B true CN106457823B (en) | 2018-09-04 |
Family
ID=54240507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580024427.8A Active CN106457823B (en) | 2014-03-31 | 2015-03-30 | The driving method and ink-jet recording apparatus of ink gun |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3127705B1 (en) |
| JP (1) | JP6497384B2 (en) |
| CN (1) | CN106457823B (en) |
| WO (1) | WO2015152186A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110861410B (en) * | 2018-08-28 | 2021-11-19 | 东芝泰格有限公司 | Liquid ejecting apparatus and image forming apparatus |
| JP7113713B2 (en) * | 2018-10-02 | 2022-08-05 | 東芝テック株式会社 | liquid ejection head |
| EP3928988B1 (en) * | 2019-02-22 | 2023-09-20 | Konica Minolta, Inc. | Method for driving liquid droplet ejection head |
| JP2020152070A (en) * | 2019-03-22 | 2020-09-24 | 東芝テック株式会社 | Liquid discharge head and liquid discharge device |
| JP2021020338A (en) * | 2019-07-25 | 2021-02-18 | 理想科学工業株式会社 | Inkjet printing device |
| JP2021070880A (en) | 2019-10-30 | 2021-05-06 | セイコーエプソン株式会社 | Ink jet recording method |
| JP7500269B2 (en) | 2020-05-15 | 2024-06-17 | 東芝テック株式会社 | Liquid ejection head and liquid ejection device |
| JP7579691B2 (en) * | 2020-12-11 | 2024-11-08 | 理想テクノロジーズ株式会社 | Inkjet head |
| JP2022135692A (en) * | 2021-03-05 | 2022-09-15 | 東芝テック株式会社 | Droplet ejection head, its drive circuit, and printer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6513915B1 (en) * | 1998-10-27 | 2003-02-04 | Matsushita Electric Industrial Co., Ltd. | Variable dot ink-jet printer |
| CN103182842A (en) * | 2011-12-27 | 2013-07-03 | 柯尼卡美能达喷墨技术株式会社 | Droplet injection apparatus and method for driving droplet injection apparatus |
| CN103302980A (en) * | 2012-03-14 | 2013-09-18 | 柯尼卡美能达喷墨技术株式会社 | Ink-jet recording apparatus |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000085158A (en) * | 1998-09-11 | 2000-03-28 | Matsushita Electric Ind Co Ltd | Ink jet recorder and recording method |
| JP2000198226A (en) * | 1998-10-27 | 2000-07-18 | Matsushita Electric Ind Co Ltd | Ink-jet printer |
| JP4000749B2 (en) * | 2000-04-26 | 2007-10-31 | コニカミノルタホールディングス株式会社 | Ink droplet ejection device |
| JP4184065B2 (en) * | 2002-12-13 | 2008-11-19 | シャープ株式会社 | Ink-jet head driving method |
| JP2005074651A (en) * | 2003-08-28 | 2005-03-24 | Toshiba Tec Corp | Inkjet recording device |
| JP5417079B2 (en) * | 2009-07-31 | 2014-02-12 | 理想科学工業株式会社 | Inkjet recording device |
| JP5440392B2 (en) * | 2010-05-31 | 2014-03-12 | コニカミノルタ株式会社 | Inkjet recording device |
-
2015
- 2015-03-30 WO PCT/JP2015/060018 patent/WO2015152186A1/en active Application Filing
- 2015-03-30 EP EP15774447.5A patent/EP3127705B1/en active Active
- 2015-03-30 JP JP2016511902A patent/JP6497384B2/en active Active
- 2015-03-30 CN CN201580024427.8A patent/CN106457823B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6513915B1 (en) * | 1998-10-27 | 2003-02-04 | Matsushita Electric Industrial Co., Ltd. | Variable dot ink-jet printer |
| CN103182842A (en) * | 2011-12-27 | 2013-07-03 | 柯尼卡美能达喷墨技术株式会社 | Droplet injection apparatus and method for driving droplet injection apparatus |
| CN103302980A (en) * | 2012-03-14 | 2013-09-18 | 柯尼卡美能达喷墨技术株式会社 | Ink-jet recording apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3127705A4 (en) | 2017-11-08 |
| JP6497384B2 (en) | 2019-04-10 |
| EP3127705B1 (en) | 2020-11-04 |
| EP3127705A1 (en) | 2017-02-08 |
| WO2015152186A1 (en) | 2015-10-08 |
| CN106457823A (en) | 2017-02-22 |
| JPWO2015152186A1 (en) | 2017-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106457823B (en) | The driving method and ink-jet recording apparatus of ink gun | |
| CN106457824B (en) | The driving method and ink-jet recording apparatus of ink gun | |
| US7988247B2 (en) | Ejection of drops having variable drop size from an ink jet printer | |
| US6488349B1 (en) | Ink-jet head and ink-jet type recording apparatus | |
| CN1182962C (en) | Demand falling printing head of piezoelectric bending transducer and control method thereof | |
| CN1345272A (en) | Ink jet recording head driving method and ink jet recording device | |
| CN108367567A (en) | The design method of ink-jet recording apparatus, the driving method of ink gun and drive waveforms | |
| EP3508344B1 (en) | Ink jet recording apparatus and ink jet recording method | |
| CN103182842B (en) | The driving method of liquid droplet ejection apparatus and liquid droplet ejection apparatus | |
| CN107107614A (en) | The driving method and droplet discharge apparatus of drop discharge head | |
| US10889110B2 (en) | Method and apparatus for droplet deposition | |
| JP2010131988A (en) | Ink jet record device and ink jet record method | |
| JP2017503689A (en) | Method, system and apparatus for improving drop velocity uniformity, drop mass uniformity and drop knitting | |
| JP3241352B2 (en) | Ink jet head and ink jet recording apparatus | |
| JP2009279865A (en) | Inkjet recording device and inkjet recording method | |
| US7946693B2 (en) | Producing and deflecting ink droplets in a continuous ink-jet printer | |
| US20040130584A1 (en) | Inkjet recording device with ink refresh function | |
| CN113147185A (en) | Liquid ejecting method, recording medium, and liquid ejecting apparatus | |
| JP2007210348A (en) | Ink drop injection apparatus | |
| Hwang et al. | A study on driving waveform of a piezoelectric inkjet print head | |
| US20240262103A1 (en) | Methods, apparatus and controller for a droplet ejection apparatus | |
| CN113147183A (en) | Liquid ejecting method, recording medium, and liquid ejecting apparatus | |
| JP2009285989A (en) | Method of restoring nozzle, and inkjet apparatus | |
| JP2016087918A (en) | Driving method of inkjet head and inkjet recording device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |