CN1151941A - Ink jet recording device - Google Patents
Ink jet recording device Download PDFInfo
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- CN1151941A CN1151941A CN96112180A CN96112180A CN1151941A CN 1151941 A CN1151941 A CN 1151941A CN 96112180 A CN96112180 A CN 96112180A CN 96112180 A CN96112180 A CN 96112180A CN 1151941 A CN1151941 A CN 1151941A
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- nozzle
- ink
- deflecting
- electrode
- deflecting electrode
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- 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
- B41J2/07—Ink jet characterised by jet control
- B41J2/075—Ink jet characterised by jet control for many-valued deflection
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- 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
- B41J2/07—Ink jet characterised by jet control
- B41J2/115—Ink jet characterised by jet control synchronising the droplet separation and charging time
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- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
The device comprises a recording head with a substantially linear array of nozzles for the emission of droplets of ink. Deflection means for electrically charging and electrostatically deflecting the emitted droplets are arranged in front of each nozzle and the device further comprises transportation means for transporting a record carrier in such a manner that a surface of the record carrier faces the nozzles and moves in a direction transverse to the array of the nozzles. The recording device is a droplet on demand recording device, each nozzle communicating with a pressure chamber associated with actuator means for emitting an ink droplet only when a predetermined signal is applied to the actuator means. The deflection means are conceived to deflect the droplets over a range of angles in a direction substantially parallel to the array of the nozzles and deflection control means are provided to control the angle of deflection of the droplets so that the entire width of the record carrier can be covered with ink droplets from a single array of nozzles.
Description
The present invention relates to a kind of jet recording device that has, this device comprises: be linear array substantially, be used for the nozzle of ink jet ink droplet; Be used for the charging of the ink droplet that sprayed and make the arrangement for deflecting of this ink droplet generation electrostatic deflection be set at the place ahead of each nozzle; This ink-jet recording apparatus also comprises the transmitting device that is used for transmitting in such a way a record carrier, that is, move on across the direction of the arrangement of nozzle towards nozzle and at one on a surface of this record carrier.
From US Re28219, learnt above-mentioned this device.This known devices is a kind of continuous ink-jet system, in this ink-jet system, and the continuous ink drop stream that from each nozzle, sprays.Arrangement for deflecting is designed to compound deflection system.Ink drop or through this arrangement for deflecting and not deflecting, or in a predetermined angular range, be deflected.Undeflected ink droplet runs on the surface of record carrier, and the ink droplet of deflection then is blocked and is sent back in the printing ink pond.Therefore this arrangement for deflecting is used to select those will be fallen ink droplet on the record carrier as a kind of selecting arrangement.
This known devices comprises the nozzle that several rows are parallel, equidistant.Owing to structural reason, the distance in row's nozzle between the adjacent nozzle is quite big.Therefore, between those points that forming by the ink drop that adjacent nozzle sprayed on the record carrier, formed the gap.In order to make this device can print the continuous delegation of extending on the whole width of record carrier, these several capable nozzles are staggered in the horizontal.If then the ink droplet from the first row nozzle and the second row nozzle ejection will drop in the same delegation of record carrier in ink droplet time (the said second row nozzle is positioned at the upstream of the first row nozzle in the transmission direction at record carrier) during ejection from the second row nozzle time lag in ink droplet when ejection from the first row nozzle.If the line number of set nozzle is enough, and if very accurately control the time interval that from the nozzle of different rows, sprays ink droplet, then can on record carrier, obtain the continuous ink droplet of delegation.Obviously, because the line number of nozzle is a lot, so this device is very big.In addition, needed high-precision controlling organization costs an arm and a leg.
The purpose of this invention is to provide a kind of the ink-jet recording apparatus that just can on record carrier, carry out monochromatic continuous printing with delegation's nozzle.For reaching this purpose, apparatus of the present invention are characterised in that, this tape deck is a kind of ink droplet tape deck of promptly answering type, each nozzle is connected with a pressure chamber, said pressure chamber is associated with actuated piece, described nozzle ejection ink drop when a prearranged signal is applied to actuated piece only, arrangement for deflecting is used to make ink droplet direction upper deflecting in the arrangement that is basically parallel to nozzle in whole angular range, the deflection angle of deflection control device control ink droplet.In prior art, this ink droplet tape deck of promptly answering type is known, for example sees US-A-4599628 and EP-A-0516188.As disclosed among the US-A-4491854, these devices generally include a less printhead, and this printhead can move in the whole width range of record carrier.For this device needs that moves of printhead makes the weight of this ink droplet tape deck increase, in addition, this mobile of printhead occupies the time, and this just makes that the speed of this tape deck is lower.The present invention is based on the understanding to such fact, promptly, can utilize the electrostatic deflection of ink drop that the ink droplet that sprays in the single-nozzle is dropped on a plurality of positions of record carrier, thereby each nozzle can printed in big zone (for example 1mm the order of magnitude) on the width of record carrier.This only just makes it possible to the delegation of extending continuously with on the whole width that prints row's nozzle and static record head at record carrier.If each nozzle covers the record carrier width of about 1mm, the row's nozzle that then includes 210 nozzles will be enough to cover the width of an A4 paper.
First embodiment of device of the present invention is characterised in that, arrangement for deflecting comprises a plate shape charging electrode that is parallel to the orientation of row's nozzle and extends, porose on this plate shape charging electrode, this hole is arranged on the place ahead of each nozzle, and deflection control device comprises a charging voltage generator and the deflection voltage generator that deflection voltage is provided to deflecting electrode that charging voltage is provided to charging electrode.Ink drop is at first passed through the hole on the charging electrode after leaving nozzle, electrostatic charge on this ink droplet band there, and said electric charge depends on the voltage that the charging voltage generator is supplied with.Then, this ink droplet that has been recharged is from process between the deflecting electrode, and this deflecting electrode makes this ink droplet deflect in an angular range of being scheduled to.The angle of deflection especially depends on the speed of electric charge, the voltage between the deflecting electrode and this ink droplet of ink droplet.For a given speed, can control described deflection angle by changing charging voltage and/or changing deflection voltage.A kind of simple especially remodeling of above-mentioned this embodiment is characterised in that, one of said charging voltage generator and deflection voltage generator are used to provide one as the function of time and the voltage that changes, and another voltage generator then is used to provide a substantially invariable voltage.In this remodeling, but only one of voltage generator must be a control type.
Second embodiment of device of the present invention is characterised in that, arrangement for deflecting comprises some to deflecting electrode, settle a pair of deflecting electrode in the place ahead of each nozzle, orientation from nozzle, each is positioned at the relative both sides of nozzle to two deflecting electrodes in the deflecting electrode, each deflecting electrode is made up of a conductive plate with first section and second section, first section of each deflecting electrode extends towards the direction away from nozzle, second section of each deflecting electrode is positioned near the nozzle, deflection control device comprises voltage generation circuit, these voltage generation circuits provide first potential pulse to each to first deflecting electrode in the deflecting electrode, provide second potential pulse to each to second deflecting electrode in the deflecting electrode, first potential pulse has identical polarity and identical amplitude with second potential pulse, and begin at synchronization, the duration of first potential pulse is different with the duration of the second voltage portion.On structure, this embodiment is simple especially, because it does not comprise the charging electrode that splits.First potential pulse combines to the charging of printing ink ink droplet with second potential pulse and makes this ink droplet deflection.Preferably, first section distance to each other of a pair of deflecting electrode is greater than second section distance to each other.Because second section of deflecting electrode is very approaching each other, also very approaching with nozzle, is very effective so the ink droplet that has sprayed is charged.Bigger distance makes it possible to an essential space and allows ink droplet move on the direction of the arrangement that is parallel to nozzle between first section, and this moving of ink droplet caused by deflection.Can obtain different distance between first section by changing structure.First kind of structure is characterised in that, second section of each deflecting electrode and first section meet at right angles substantially and extend, first section is basically perpendicular to the orientation of nozzle, second section is basically parallel to the orientation of nozzle, and second section of each deflecting electrode in a pair of deflecting electrode extends another deflecting electrode in the deflecting electrode towards this.Second kind of structure be characterised in that, deflecting electrode be shaped as arc, the bearing of trend of second section and the orientation of nozzle meet at right angles substantially.
Tape deck of the present invention can be retrofited and is used for multi-color printing.A kind of in one embodiment device of this purpose that is applicable to is characterised in that, record head comprise plurality of rows substantially parallel be linearly aligned nozzle, the nozzle among the different rows is applicable to the ink drop of spraying different colours.If each row's nozzle is connected with the pressure chamber of the printing ink that one of four kinds of basic colors (being generally magenta, cyan, yellow and black) are provided, then four row's nozzles are enough to obtain the printing of four kinds of colors on record carrier.Certainly, can drop on for the ink droplet that guarantees the different colours on those the same areas that will drop on formed image in the same delegation of record carrier, need between difference row's the ink droplet jet that nozzle carried out, introduce suitable time-delay.
A kind of remodeling that is used for the tape deck of multi-color printing is characterised in that, record head comprises that being linearly aligned first row's nozzle and second substantially arranges nozzle, adjacent nozzle among first row is applicable to respectively and sprays the ink drop with first kind of color and second kind of color, adjacent nozzle among second row is applicable to respectively and sprays the ink drop with the third color and the 4th kind of color that said first kind of color, second kind of color, the third color and the 4th kind of color are mutually different.The deflection that has been found that ink drop makes it possible to two kinds of colors of row's nozzle ejection.Ink droplet by the different colours of adjacent nozzle ejection can be deflected, thereby makes them overlapping on record carrier.Can only just spray four kinds of basic colors thus with two row's nozzles.Polychrome recording device structure with above-mentioned these features is simple, in light weight.
Above-mentioned these aspects of the present invention and other direction will embody from embodiment hereinafter described.
Fig. 1 is the schematic diagram of an embodiment of ink-jet recording apparatus of the present invention;
Fig. 2 is the partial cross section view of first embodiment of the record head in the device shown in Figure 1;
Fig. 3 is the vertical view of the record head shown in Fig. 2;
Fig. 4 is the block diagram of the control module in the device shown in Figure 1;
Fig. 5 is the schematic diagram that expression is applied to an example of the voltage on the electrode of record head shown in Figure 2;
Fig. 6 A and Fig. 6 B are the partial sections of two kinds of remodeling of second embodiment of the record head in the device shown in Figure 1;
Fig. 7 is the vertical view of the record head shown in Fig. 6 B;
Fig. 8 is the schematic diagram that expression is applied to an example of the voltage on the electrode of the record head shown in Fig. 6 A and Fig. 6 B;
Fig. 9 is the vertical view of the 3rd embodiment of the record head in the device shown in Figure 1;
Figure 10 is the vertical view of the variant embodiment of the record head in the device shown in Figure 1;
Fig. 1 is the explanatory view of an ink-jet recording apparatus, and this figure shows those at least and provides enough required parts of the figure viewed from behind for understanding the present invention.This device comprises a record head 1, and record head 1 comprises the nozzle of a row in order to the linear arrangement of ink jet ink droplet.Can't see this row's nozzle in Fig. 1, it is parallel to chain-dotted line 3 and extends.These nozzle face wait marquis's workbench 5 to one, and this workbench 5 is used for when this device does not use record head remained on a suitable state.Ink reservoir 6 is used for providing printing ink to record head 1.This device also comprises the conveyer that is a pair of synergy roller 7 forms, and this is driven by motor 9 synergy roller 7.Roller 7 is used for transmitting in such a way record body 11 (this record carrier 11 is a piece of paper normally), that is, record carrier 11 record head 1 with wait between the workbench 5 as indicated by arrow 13 horizontal facing to mobile on the direction of this row's nozzle.When record carrier 11 was transmitted like this, the one side of this record carrier 11 (said this one side is down in Fig. 1) was towards nozzle.The operation of control module 14 these tape decks of control.
Fig. 2 shows the cross section that cuts open the record head 1 among first embodiment that gets along a line that parallels with line 3 among Fig. 1.This record head comprises that several are arranged on the actuation plate 16 piezoelectric actuated 15, and said actuation plate 16 comprises the piezoelectric ceramics material which floor and electrode layer (not shown) replace.This actuation plate 16 is provided with the groove 17 that constitutes pressure chamber, piezoelectric actuated 15 and each pressure chamber acting in conjunction.Pressure chamber 17 links with ink reservoir 6 (Fig. 1) by the ink supply system (not shown).Depicted in greater detail to this class record head can be at the patent application NO of conduct with reference to the together unexamined of file ... (PHN15.079) find in.Each pressure chamber 17 is connected with nozzle 19 on the nozzle plate 21, and said nozzle plate 21 covers a side of pressure chamber.As implied above, nozzle 19 is linear array substantially and is parallel to line 13 extensions.The opposite side of pressure chamber 17 is covered by plate 23 after.When suitable voltage being applied on the actuated piece 15, the pressure chamber 17 that is associated shrinks, and ink drop sprays from the nozzle 19 that is associated.Known this system is promptly the answer type ink droplet jet system relative with the continuous type spraying system, as disclosed among the US Reissue No.28219, produces a branch of continuous ink droplet stream in the said continuous type spraying system.
The place ahead at each nozzle 19 is equipped with arrangement for deflecting, like this, must pass through these arrangements for deflecting by the ink drop of nozzle ejection.In the embodiment shown in Figure 2, this arrangement for deflecting comprises a plate shape charging electrode 25 and a plurality of deflecting electrode 27 that is placed in this charging electrode the place ahead.This charging electrode 25 is parallel to row's nozzle 19 and extending, and porose 29 on the charging electrode 25, each hole in these holes 29 is positioned at the place ahead of each nozzle.Deflecting electrode 27 also is a plate shape.The extension that meets at right angles of the basic and charging electrode 25 of these deflecting electrodes 27.In this embodiment, the middle place of deflecting electrode 27 between every pair of adjacent hole 29.Charging electrode 25 and deflecting electrode 27 all conduct electricity.Each deflecting electrode 27 by means of an insulation end part 31 with charging electrode 25 electric insulations.Charging electrode 25 and deflecting electrode 27 can be made by metallic plate (for example nickel plate).In this case, deflecting electrode 27 can be by means of a kind of bonding agent of electric insulation and charging electrode 25 mechanical attachment, and said bonding agent has constituted above-mentioned end part 31.Another kind of interchangeable scheme is, with a kind of electrically insulating material (for example glass) charging electrode 25 and deflecting electrode 27 are made single structure, then for example by suitable metal being vaporized in a vacuum and covering the place except that end part 31 on this structure with conducting film.
What Fig. 3 represented is the view of looking from the top of record head shown in Figure 2.Be shown in broken lines a pressure chamber 17.As can be seen from the figure, in adjacent domain charging electrode 25 covering nozzles 21 of the nozzle 19 that can see by hole 29, deflecting electrode 27 is positioned near the hole 29.
Fig. 4 is the block diagram of the control module 14 of tape deck shown in Figure 1.This control module 14 comprises a central control unit 33, ejection control device 37 and deflection control device 39, central control unit 33 wherein can comprise a microprocessor and control control device of electric motor 35, said motor control assembly 35 is used to control motor 9, ejection control device 37 is used to control the injection of ink drop, and deflection control device 39 is used to control the deflection of the ink drop of being sprayed.In Fig. 2 and embodiment shown in Figure 3, deflection control device 39 comprises the charging voltage generator 41 and the deflection voltage generator 43 that is used for providing to deflecting electrode 27 deflection voltage that are used for providing to charging electrode 25 charging voltage.Central control unit 33 is coordinated above-mentioned control device 35,37 and 39 effect, so that ink drop is fallen place, record carrier 11 lip-deep desired position.
Operate as follows: when ink drop sprayed from printing ink nozzle 19, this ink droplet was through the relevant hole 29 on the charging electrode 2.The output of charging voltage generator 41 is electrically connected between ink feeding system (for example ink reservoir 6 or nozzle plate 21) and the charging electrode 25.Therefore, this charging electrode 25 remains on the predetermined voltage with respect to the printing ink in the pressure chamber 17.Consequently, 29 ink drop of passing have charging charge from the hole, and this charging charge depends on the charging voltage that charging voltage generator 41 is provided.The terminal of deflection voltage generator 43 and deflecting electrode 27 such linking, that is, two deflecting electrodes of 29 both sides link with the different terminal of deflection voltage generator in the hole at every turn.Therefore, the deflecting electrode 27 that continues have as the symbol among Fig. 2+and-shown in opposite polarity.Consequently, set up deflecting electric field between each is to deflecting electrode 27, the sensing of this deflecting electric field is parallel to the arrangement of nozzle 19.The track of the feasible ink drop 45 of having charged of this deflecting electric field is an arc, and the dotted line 46,47 among Fig. 2 shows two examples.The different polarity of the deflecting electrode 27 that continues causes from the ink droplet of adjacent nozzle 19 ejection upper deflecting in the opposite direction.Because charging voltage and deflection voltage value is big or small identical for all ink droplets, so deflection angle also is identical.By changing charging voltage and/or deflection voltage, can control the deflection angle of all ink droplets.Simple as far as possible for the control that makes this tape deck, one in these voltages preferably keeps constant.Change another voltage then and control the deflection angle of ink drop like this, that is, if the arc of two tracks is the other side towards each other, then for the deflection of maximum, the joining of adjacent track 46,47 overlaps with record carrier 11.So just the enough ink droplets of energy cover the whole width of record carrier 11.For a given deflection angle, the ink droplet 45 of ejection is fallen on such position of record carrier from nozzle 19, that is, with respect to that position that faces nozzle, it is last that said this position is in one section given distance that is parallel to line 3.Ink drop is fallen on that position, and then central control unit 33 causes that spraying control module provides signal to corresponding actuated piece 15.If signal is not provided, then there is not the ink droplet ejection.
Fig. 5 is the chart of expression as an example of the charging voltage of the function of time.As above having pointed out, the voltage of this variation preferably combines with a constant deflection voltage.Another kind of interchangeable scheme is can change deflection voltage as shown in Figure 5, and charging voltage is kept constant.Above-mentioned charging voltage V originates in maximum negative value-Vmax and steppedly is increased to maximumly on the occasion of+Vmax, and each step is corresponding to an independent deflection angle.In this example, number of steps is 10, and finishing the used time of all steps is T.Charging voltage is lowered to-Vmax with an independent step then, to begin next circulation.Therefore, this charging voltage is similar to a saw-tooth voltage.Also can be during time T stepped reduction charging voltage so that this charging voltage is similar to a triangular voltage.Also can make charging voltage change the stepped variation that (for example being linear change) substitutes charging voltage continuously.Under the sort of situation, deflection angle also changes continuously.Charging voltage-Vmax and+variation between the Vmax is corresponding to the variation of deflection angle between two limiting values of ink drop, said limiting value is in the scope of whole possible angle value.During time interval T, central control unit 33 prevents control device of electric motor 35 excited electric motors 9, with the transmission of interruption logging carrier 11.Therefore, all by the ink droplet of nozzle 19 ejection in this time interval all with delegation that line 3 parallels on fall on the record carrier.
As mentioned above, the output of charging voltage generator 41 preferably is connected between ink feeding system and the charging electrode 25.For stable operation, preferably with ink feeding system and charging electrode 25 ground connection all.This charging electrode 25 can contact with the metallic brush (not shown) of a ground connection, and this metallic brush is as the sparking electrode of electrostatic charge.On the side of the record head dorsad 1 of record carrier 11, a reverse electrode (for example being a part that waits marquis's workbench 5) that is the conducting surface form can be set, a predetermined voltage is applied on it.So just have following advantage, that is, ink drop can have high initial velocity, and for the good injection of ink droplet, this high initial velocity is preferable.Then, be applied to the speed that voltage on this reverse electrode is used for reducing ink droplet, so that these ink droplets can not move too soon when passing deflecting electric field, thus suitably deflection.
In the first above-mentioned embodiment, with each shared public deflecting electrode 27 of arrangement for deflecting that adjacent nozzle 19 is associated.Consequently, the ink droplet that is sprayed by adjacent nozzle 19 is in the opposite direction by synchronous deflection.Also two deflecting electrodes 27 can be set between every pair of nozzle 19, these two deflecting electrodes are electrically insulated from each other, and electrically connect with the different terminations of charging electrode generator 41.In this case, the ink droplet that is sprayed by adjacent nozzle 19 is in the same direction by synchronous deflection.
What Fig. 6 represented is the cross section of the part of the record head in the second embodiment of the invention, first kind of remodeling that Fig. 6 A represents, and what Fig. 6 B represented is second kind of remodeling.The structure in the ink-jet district of this record head and the structure similar of first embodiment shown in Fig. 2.For simplicity, in Fig. 6, only show nozzle plate 21 in this structure.
In a second embodiment, comprised that with a kind of several electrode assemblies to deflecting electrode 48 replace the combination of charging electrode 25 and deflecting electrode 27 among first embodiment.In Fig. 6, settle a pair of deflecting electrode 48 like this in the front of each nozzle 19, that is, this is positioned at the left side of nozzle opening to an electrode in the deflecting electrode, and its another electrode is positioned at the right side.In other words, from the orientation of nozzle, this is positioned at the two opposite sides of nozzle 19 to two electrodes 48 in the deflecting electrode.Each deflecting electrode 48 is made of the conductive plate with first section 49 and second section 50, and first section 49 extends towards the direction away from nozzle 19, and second section 50 is positioned near the nozzle.These conductive plates for example can be the insulation boards of metallic plate or plating.First section 49 distance each other of a pair of deflecting electrode 48 is greater than second section 50 distance to each other.Consequently, define a narrow slit 51 between two second sections 50, the ink drop of being sprayed must be from this narrow slit process.When ink droplet process narrow slit 51, deflecting electrode 48 remains on the predetermined current potential with respect to ink feeding system or with respect to nozzle plate 21.Ink droplet just obtains electrostatic charge like this, and the amount of the electric charge that obtains depends on above-mentioned this voltage.When ink droplet had passed through narrow slit 51, a predetermined voltage was applied between the pair of electrodes 48 relevant with a common nozzle 19.Produced a deflecting electric field therefrom between this is to electrode 48, when above-mentioned charged droplets continued to advance between this is to deflecting electrode first section 49, this deflecting electric field made above-mentioned charged droplets deflect.This has dual-use function with regard to meaning this deflecting electrode 48: they are used for providing electrostatic charge to the ink drop by nozzle 19 ejections, and make the scope intrinsic deflection of these charged droplets at controllable deflection angle.
In the remodeling shown in Fig. 6 A, second section 50 of each deflecting electrode 48 basic with the extension that meets at right angles of first section 49.First section 49 is basically perpendicular to the arrangement of nozzle 19 and extends, and second section 50 is parallel to the arrangement of nozzle 19 and extends.In this remodeling, the cross section of deflecting electrode 48 is L shaped, and second section 50 of each deflecting electrode in a pair of deflecting electrode extends another deflecting electrode in the deflecting electrode towards this.In the remodeling shown in Fig. 6 B, deflecting electrode 48 is an arc, and this arc is imitated the path of the ink drop with maximum deflection angle substantially.Second section, 50 right angles that are arranged in basic and nozzle 19 extend.
Because must apply voltage between two electrodes 48 in pair of electrodes, all be connected so be positioned at the electrode in nozzle 19 left sides, and the electrode that is positioned at nozzle 19 right sides all is connected with second common terminal with first common terminal, this can be as seen from Figure 7.What Fig. 7 represented is the vertical view of retrofiting shown in Fig. 6 B.In Fig. 7, represent first terminal and second terminal respectively with 53 and 55.Each terminal 53,55 has formed comb shaped structure, these two kinds of comb shaped structure weave ins with the electrode that connects thereon.First terminal 53 is connected with the terminal of voltage generator with second terminal 55, and said voltage generator is the part of the deflection control device 39 shown in Fig. 4.
Fig. 8 is the schematic diagram that expression can be applied to an example of the voltage on the terminal 53,55.In this example, apply the first voltage V1, apply the second voltage V2 to second terminal 55 to first terminal 53.The first voltage V1 comprises a series of first potential pulses, figure 8 illustrates two pulses 57 and 59.The duration of the first continuous potential pulse changes in a kind of predetermined mode.In Fig. 8, first pulse of first potential pulse (57) finishes in the beginning of time t1 place and at time t3 place, and second potential pulse (59) finishes in the beginning of time t4 place and at time t6 place, and time interval t6-t4 is greater than time interval t3-t1.In the embodiment of a reality, the duration of first potential pulse will from a minimum of a value t2-t1 (=t5-t4) be increased to a predetermined maximum value (not shown) gradually.The second voltage V2 comprises a series of second potential pulses, for example 61 and 63, these potential pulses have identical duration t2-t1 (=t5-t4).Therefore, corresponding first and second potential pulses begin at one time, and have usually the different duration (just as noted above, first voltage can comprise its duration potential pulse identical with the duration of second potential pulse).The impulse amplitude A of first potential pulse and second potential pulse is identical, polarity is identical.
At time t1 place, on first terminal 53 that first potential pulse 57 is applied to the deflecting electrode 48 that is positioned at nozzle 19 left sides is connected, on second terminal 55 that second potential pulse 61 is applied to the deflecting electrode 48 that is positioned at nozzle 19 right sides is connected.Because the impulse amplitude A and the polarity of these two pulses 57,61 are all identical, so during time interval t2-t1, be in same current potential with respect to the ink supply system of nozzle plate 21 at the deflecting electrode 48 of nozzle 19 both sides.The ink drop that sprays when the beginning in this time interval is being passed through second section 50 of deflecting electrode 48 and is being with electrostatic charge during this time interval.At time t2 place, second pulse 61 finishes, and first pulse 57 continues with same amplitude.Consequently, between two deflecting electrodes 48, form electrostatic field in nozzle 19 both sides.Since the existence of this electric field, charged droplets with regard to deflecting away from that electrode 48 that is connected with first terminal 53.When ink droplet between first section 49 of two deflecting electrodes 48 through above-mentioned this deflection of out-of-date generation.Deflection angle depend in the duration t2-t1 of second pulse 61 and in first pulse 57 more than first pulse 57 in that section duration t3-t2 of second pulse 61 and the impulse amplitude A of second pulse 61.Therefore, the first method of control deflection angle comprises the duration that changes first pulse 57.Be performed such in example shown in Figure 8: next pulse 59 is longer than pulse 57.After the maximum length in time that reaches first pulse, for deflection ink drop in the opposite direction, must apply the first voltage V1 to second terminal 55, apply the second voltage V2 to first terminal 53.The another kind of method that is used to control deflection angle is the duration that changes second pulse 61, is applied to electrostatic charge on the ink droplet with control.This method has been utilized such fact, that is, if deflecting electric field is identical, then deflection angle increases under the situation that increases electric charge.Another method that is used to control deflection angle is the amplitude A that changes first pulse and second pulse.
Fig. 9 is the view of looking from a top that is used for the record head of polychrome ink-jet recording apparatus.This figure and Fig. 3 are similar, so use identical piece mark as far as possible.This record head comprises that two arrange the substantially parallel linearly aligned nozzle that is, i.e. first row, 65 and second row 67.First row 65 comprises two kinds of nozzles, i.e. first kind of nozzle 19a and second kind of nozzle 19b.In first row's nozzle, first kind of nozzle and second kind of nozzle are alternately arranged.Equally, in second row 67, the third nozzle 19c and the 4th kind of nozzle 19d alternately arrange.Difference between these four kinds of nozzles is that their institute's pressure chambers communicating are connected with the ink feeding system of the printing ink that is loading different colours.By this way, different types of nozzle is applicable to the ink drop of spraying different colours.For example, nozzle 19a, 19b, 19c and 19d spray magenta ink, blue ink, black ink and Yellow ink respectively.The spacing between the nozzle and the maximum deflection angle of ink drop are chosen such that promptly, but the ink droplet deflection that nozzle sprayed is so far away, and promptly these ink droplets are fallen on those aspects that are positioned at two adjacent nozzle opposites on the record carrier 11.Like this, can fall the front and the place, each centre position of each nozzle of two second kind of adjacent nozzle 19b by the ink droplet of a nozzle ejection among first kind of nozzle 19a.Therefore, this record head makes the ink drop by two kinds of colors of nozzle 19a among first row 65 and 19b ejection can drop on the whole width of record body 11.Equally, the ink drop by nozzle 19c among second row 67 and 19d ejection can drop on the whole width of record carrier 11.As shown in Figure 1, record carrier 11 with the arrangement 65 of nozzle and 67 rectangular directions 13 on transmission.Therefore, if one section proper spacing of delayed injection of the ink drop that the injection of the ink drop that second nozzle 19c and the 19d of row in 67 carried out is carried out with respect to nozzle 19a and 19b among first row 65 then drops on the same line that the whole width at record carrier 11 extends from the ink drop of whole four kinds of nozzles ejections.Can calculate required this delay at an easy rate from the speed of record carrier 11 and the distance between two row's nozzles 65,67.Central control unit 33 can be programmed, to control described this delay.Obviously, use the record head shown in Fig. 8, just can obtain the very compact and cheap polychrome ink-jet recording apparatus of structure.Can retrofit to the layout in the diagram, for example, can use three row's nozzles or four row's nozzles, a kind of color of every row's nozzle ejection.
Figure 10 is the similar vertical view of making the record head of change slightly of record head a kind of and shown in Figure 3.In this record head, nozzle 19 staggers a little.They form a kind of linear array that zigzag extends that is, and the direction of zigzag is indicated by line 69.The advantage of this structure is that each line-spacing of arranging between the nozzle 19 can be less than the jet blower line-spacing when arranging in strict accordance with straight line shown in Figure 3.Like this, can improve the writing speed or the interior dress redundant information of this device, this is because can be dropped on the same position on the record carrier 11 by the ink drop of adjacent nozzle 19 ejection.Certainly, in order on record carrier 11, to obtain straight line, need make the ink droplet jet that from different nozzles 19, carries out carry out suitable time-delay.This zigzag of nozzle is arranged in each the row's nozzle 65 and 67 that also can be used in record head shown in Figure 9.
Claims (12)
1. ink-jet recording apparatus with record head (1), it comprises: be linear array substantially, be used for the nozzle (19) of ink jet ink droplet (45); Be placed in each nozzle the place ahead, be used for ink droplet charging of being sprayed and the arrangement for deflecting (25,27) that makes this ink droplet generation electrostatic deflection; This ink-jet recording apparatus also comprises the conveyer (7 that is used for transmitting by this way record carrier (11), 9), promptly, record carrier faces nozzle and moves across the arrangement of nozzle on direction 13, it is characterized in that, this tape deck is a kind of ink droplet tape deck of promptly answering type, each nozzle (19) is connected with a pressure chamber (17), said pressure chamber (17) is associated with actuated piece (15), nozzle (19) ink jet ink droplet (45) when a prearranged signal is applied on the actuated piece only, arrangement for deflecting (25,27) be used to make ink droplet direction upper deflecting in the arrangement that is basically parallel to nozzle in whole angular range, the deflection angle of deflection control device (39) control ink droplet.
2. ink-jet recording apparatus as claimed in claim 1, it is characterized in that, arrangement for deflecting comprises a plate shape charging electrode (25) that is parallel to the orientation of nozzle (19) and extends, this plate shape charging electrode (25) is gone up porose (29), this hole (29) is arranged on the place ahead of each nozzle, deflecting electrode (27) be set at the place ahead of charging electrode and be positioned at each hole near, deflection control device (39) comprises a charging voltage generator (41) and the deflection voltage generator (43) that deflection voltage is provided to deflecting electrode that charging voltage is provided to charging electrode.
3. ink-jet recording apparatus as claimed in claim 2, it is characterized in that, said charging voltage generator and deflection voltage generator (41,43) one of be used to provide one as the function of time and the voltage (V) that changes, another voltage generator then is used to provide a substantially invariable voltage.
4. ink-jet recording apparatus as claimed in claim 1, it is characterized in that, arrangement for deflecting comprises some to deflecting electrode (48), settle a pair of deflecting electrode (48) in the place ahead of each nozzle (19), orientation from nozzle, each is positioned at the relative both sides of nozzle to two deflecting electrodes in the deflecting electrode, each deflecting electrode is made up of the conductive plate of a tool tool first section and second section, first section (49) of each deflecting electrode extends towards the direction away from nozzle, second section (50) of each deflecting electrode is positioned near the nozzle, deflection control device (39) comprises voltage generation circuit, these voltage generation circuits provide first potential pulse (57) to each to first deflecting electrode in the deflecting electrode, provide second potential pulse (61) to each to second deflecting electrode in the deflecting electrode, first potential pulse has identical polarity and identical amplitude (A) with second potential pulse, and begin at synchronization, the duration of first potential pulse is different with the duration of second potential pulse.
5. ink-jet recording apparatus as claimed in claim 4 is characterized in that, first section (49) distance each other of a pair of deflecting electrode (48) is greater than this second section (50) distance each other to deflecting electrode (48).
6. ink-jet recording apparatus as claimed in claim 5, it is characterized in that, second section (50) of each deflecting electrode (48) meets at right angles substantially with first section (49) and extends, first section (49) is basically perpendicular to the orientation of nozzle (19), second section (50) is basically parallel to the orientation of nozzle (19), and second section of each deflecting electrode in a pair of deflecting electrode extends another deflecting electrode in the deflecting electrode towards this.
7. ink-jet recording apparatus as claimed in claim 5 is characterized in that, deflecting electrode (48) be shaped as arc, the orientation of the bearing of trend of second section (50) and nozzle (19) meets at right angles substantially.
8. as the described ink-jet recording apparatus of arbitrary claim in the claim 4 to 7, it is characterized in that deflection control device (39) comprises the device of the duration that is used to change first potential pulse (57).
9. as the described ink-jet recording apparatus of arbitrary claim in the claim 4 to 8, it is characterized in that deflection control device (39) comprises the device of the duration that is used to change second potential pulse (61).
10. as the described ink-jet recording apparatus of arbitrary claim in the claim 4 to 7, it is characterized in that deflection control device (39) comprises the device of the amplitude (A) that is used to change first potential pulse and second potential pulse (57,61).
11. the described ink-jet recording apparatus of arbitrary claim in the claim as described above, it is characterized in that, record head comprise plurality of rows (65,67) substantially parallel be linearly aligned nozzle (19a, 19d), the nozzle among the different rows is applicable to the ink drop of spraying different colours.
12. ink-jet recording apparatus as claimed in claim 11, it is characterized in that, record head comprises that being linearly aligned first row's nozzle and second substantially arranges nozzle, adjacent nozzle (19a among second row (65), 19b) be applicable to spray to have first kind of color and ink drop respectively with second kind of color, adjacent nozzle (19c among second row (67), 19d) be applicable to spray to have the third color and the ink drop with the 4th kind of color respectively, said first kind of color, second kind of color, the third color and the 4th kind of color are mutually different.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP95202047A EP0755790A1 (en) | 1995-07-25 | 1995-07-25 | Ink jet recording device |
| EP95202047.7 | 1995-07-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1151941A true CN1151941A (en) | 1997-06-18 |
Family
ID=8220533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96112180A Pending CN1151941A (en) | 1995-07-25 | 1996-07-24 | Ink jet recording device |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0755790A1 (en) |
| JP (1) | JPH0939254A (en) |
| KR (1) | KR970005638A (en) |
| CN (1) | CN1151941A (en) |
| SG (1) | SG47164A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1310759C (en) * | 2003-01-21 | 2007-04-18 | 精工爱普生株式会社 | Drop ejection device, printing device, printing meethod and electrooptics device |
| CN100393513C (en) * | 2003-02-10 | 2008-06-11 | 索尼株式会社 | Liquid discharge equipment and liquid discharge method |
| CN101415560B (en) * | 2006-03-29 | 2010-12-22 | 京瓷株式会社 | Liquid discharge device |
| CN105112965A (en) * | 2015-09-16 | 2015-12-02 | 上海圣匡机电科技有限公司 | Printing head, printing device and printing method for rapid forming of metal piece |
| CN110325367A (en) * | 2017-04-05 | 2019-10-11 | 株式会社日立产机系统 | Ink-jet recording apparatus |
| CN111032358A (en) * | 2017-08-31 | 2020-04-17 | 株式会社日立产机系统 | Ink jet recording apparatus and control method thereof |
| CN112590397A (en) * | 2020-12-11 | 2021-04-02 | 京东方科技集团股份有限公司 | Ink jet module and ink jet printing equipment |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3832583B2 (en) * | 2001-04-06 | 2006-10-11 | リコープリンティングシステムズ株式会社 | Preliminary ejection device and inkjet recording apparatus provided with preliminary ejection device |
| KR100840326B1 (en) | 2002-06-28 | 2008-06-20 | 삼성전자주식회사 | a liquid crystal display and a thin film transistor array panel for the same |
| JP3770252B2 (en) * | 2003-02-27 | 2006-04-26 | ソニー株式会社 | Liquid ejection apparatus and liquid ejection method |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE28219E (en) | 1968-10-18 | 1974-10-29 | Image construction system using multiple arrays of drop generators | |
| JPS5841744B2 (en) * | 1978-06-21 | 1983-09-14 | 株式会社リコー | Speed control deflection type inkjet recording device |
| JPS55166261A (en) * | 1979-06-11 | 1980-12-25 | Ricoh Co Ltd | Deflecting electrode for ink jet recorder |
| JPS56157588A (en) * | 1980-05-08 | 1981-12-04 | Nec Corp | Multinozzle ink jet recording device |
| US4338613A (en) * | 1980-12-19 | 1982-07-06 | Pitney Bowes Inc. | Ink drop deflector |
| US4382263A (en) * | 1981-04-13 | 1983-05-03 | Xerox Corporation | Method for ink jet printing where the print rate is increased by simultaneous multiline printing |
| US4389652A (en) * | 1981-09-22 | 1983-06-21 | Xerox Corporation | Bidirectional ink jet printing |
| US4491854A (en) | 1982-07-29 | 1985-01-01 | U.S. Philips Corporation | Printer with a guide ruler for flattening a record carrier |
| DE3342844A1 (en) | 1983-11-26 | 1985-06-05 | Philips Patentverwaltung Gmbh, 2000 Hamburg | MICROPLANAR INK JET PRINT HEAD |
| JP3041952B2 (en) | 1990-02-23 | 2000-05-15 | セイコーエプソン株式会社 | Ink jet recording head, piezoelectric vibrator, and method of manufacturing these |
| JP2673837B2 (en) * | 1990-11-05 | 1997-11-05 | シルバー精工株式会社 | Continuous jet type inkjet recording device |
-
1995
- 1995-07-25 EP EP95202047A patent/EP0755790A1/en not_active Withdrawn
-
1996
- 1996-07-24 SG SG1996010340A patent/SG47164A1/en unknown
- 1996-07-24 CN CN96112180A patent/CN1151941A/en active Pending
- 1996-07-25 KR KR1019960031751A patent/KR970005638A/en not_active Application Discontinuation
- 1996-07-25 JP JP8196335A patent/JPH0939254A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1310759C (en) * | 2003-01-21 | 2007-04-18 | 精工爱普生株式会社 | Drop ejection device, printing device, printing meethod and electrooptics device |
| CN100393513C (en) * | 2003-02-10 | 2008-06-11 | 索尼株式会社 | Liquid discharge equipment and liquid discharge method |
| CN101415560B (en) * | 2006-03-29 | 2010-12-22 | 京瓷株式会社 | Liquid discharge device |
| CN105112965A (en) * | 2015-09-16 | 2015-12-02 | 上海圣匡机电科技有限公司 | Printing head, printing device and printing method for rapid forming of metal piece |
| CN110325367A (en) * | 2017-04-05 | 2019-10-11 | 株式会社日立产机系统 | Ink-jet recording apparatus |
| US11027540B2 (en) * | 2017-04-05 | 2021-06-08 | Hitachi Industrial Equipment Systems Co., Ltd. | Inkjet recording device |
| CN111032358A (en) * | 2017-08-31 | 2020-04-17 | 株式会社日立产机系统 | Ink jet recording apparatus and control method thereof |
| CN111032358B (en) * | 2017-08-31 | 2021-09-03 | 株式会社日立产机系统 | Ink jet recording apparatus and control method thereof |
| CN112590397A (en) * | 2020-12-11 | 2021-04-02 | 京东方科技集团股份有限公司 | Ink jet module and ink jet printing equipment |
| US11794471B2 (en) | 2020-12-11 | 2023-10-24 | Boe Technology Group Co., Ltd. | Inkjet assembly, inkjet printing apparatus and inkjet printing method for use in preparation of display component |
Also Published As
| Publication number | Publication date |
|---|---|
| SG47164A1 (en) | 1998-03-20 |
| EP0755790A1 (en) | 1997-01-29 |
| KR970005638A (en) | 1997-02-19 |
| JPH0939254A (en) | 1997-02-10 |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |