CN103042830B - Liquid sprayer and drive control method thereof - Google Patents
Liquid sprayer and drive control method thereof Download PDFInfo
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- CN103042830B CN103042830B CN201110309410.0A CN201110309410A CN103042830B CN 103042830 B CN103042830 B CN 103042830B CN 201110309410 A CN201110309410 A CN 201110309410A CN 103042830 B CN103042830 B CN 103042830B
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Abstract
The invention provides a liquid sprayer and a drive control method thereof. The liquid sprayer comprises a silicon substrate, and a drive pulse generation circuit, a drive control circuit and a plurality of printing heads arranged in matrix formed on the silicon substrate, wherein any one printing head comprises a liquid chamber and a piezoelectric device. The drive pulse generation circuit is used for applying drive pulse voltage to the first electrode of each piezoelectric device; the drive control circuit comprises a data line used for transmitting a printing data signal and a plurality of drive control units connected to the second electrode of the piezoelectric device correspondingly one by one; the drive control units are further connected with the data line for acquiring a rank address enabling signal of the corresponding piezoelectric device and determining the voltage applied to the second electrode of the piezoelectric device according to the rank address enabling signal and the printing data signal, so as to change the voltage difference of the two electrodes of the piezoelectric device. The liquid sprayer provided by the invention can realize the rank two-dimensional addressing of the printing heads and can favourably realize the miniaturization of the liquid sprayer.
Description
Technical field
The present invention relates to printer technology field, particularly relate to a kind of fluid jetting head and drived control method thereof.
Background technology
Inkjet recording device comprises ink jet-print head, and the working mechanism of ink jet-print head is according to print signal, applies the energy needed for ink ejection, the ink in liquid chamber is sprayed from nozzle to the ink in liquid chamber.Piezoelectric vibration formula shower nozzle is a conventional class ink jet-print head, mainly through the vibration of the piezo-electric device in liquid chamber, for the ink in liquid chamber provides the energy needed for outwards spraying.
The multiple printhead of accessible site in a shower nozzle, improves print speed by driving multiple printhead and improves print quality.Existing piezoelectric vibration formula ink jet-print head mainly contains two kinds: a kind of record head of piezoelectric type driver being the use of the compressional vibration pattern that piezo-electric device is extended or shunk at direction of principal axis, another kind is the use of the record head of the piezoelectric type driver of beam mode.Multiple printheads that the shower nozzle of this two type comprises all linearly type arrangement, drives these printhead work by drive circuit.
Along with the continuous evolution of shower nozzle technology, the quantity of printhead integrated in a shower nozzle will get more and more, to meet the demand of print speed that people improve day by day and print quality.In addition, shower nozzle miniaturization is also the inexorable trend of shower nozzle technical development.But multiple printhead linearly type arrangement in prior art piezoelectric vibration formula shower nozzle, this linear pattern mode can not space in flexible utilization shower nozzle, makes shower nozzle overall structure loose, is unfavorable for the miniaturization of shower nozzle.
Summary of the invention
The invention provides a kind of fluid jetting head and drived control method thereof, be conducive to the miniaturization realizing fluid jetting head.
The invention provides a kind of fluid jetting head, comprising:
Silicon substrate, and the driving pulse formed on a silicon substrate produces circuit, Drive and Control Circuit and multiple printhead;
Described multiple print head matrix arrangement; Arbitrary described printhead comprises: a liquid chamber and a piezo-electric device; The bottom of described liquid chamber to be formed on described silicon substrate and to be formed with the ink-feed channel with described liquid chamber conducting, top be formed with described liquid chamber conducting go out ink passage; The sidewall of described piezo-electric device at least one end and described liquid chamber is affixed, controls described liquid chamber outwards spray ink or inject ink to described liquid chamber by the vibration of described piezo-electric device;
Described driving pulse produce circuit respectively with the first Electrode connection of each described piezo-electric device, apply driving pulse voltage for the first electrode to each described piezo-electric device;
Described Drive and Control Circuit comprises: for the data wire of transferring printing data signal and multiple driving control unit of connecting one to one with the second electrode of each described piezo-electric device; Arbitrary described driving control unit is also connected with described data wire, for obtaining the rank addresses enable signal of the corresponding described piezo-electric device connected, and according to the described rank addresses enable signal obtained and described print data signal, determine the voltage of the second electrode being applied to the corresponding described piezo-electric device connected, to change the voltage difference at the two poles of the earth of the corresponding described piezo-electric device connected.
Present invention also offers a kind of drived control method of fluid jetting head, comprising:
First electrode of the piezo-electric device of each printhead in multiple printheads of the matrix arrangement comprised to fluid jetting head, applies driving pulse respectively and produces the driving pulse voltage that circuit exports;
The data wire of Drive and Control Circuit transmits print data signal;
In described multiple printhead, determine target printhead according to the printing target area obtained in advance, and obtain the rank addresses of the target piezo-electric device of described target printhead; According to the rank addresses of described target piezo-electric device, the target drives control unit line of input column address enable signal that connect corresponding to described target piezo-electric device in described Drive and Control Circuit;
Described target drives control unit receives described print data signal by described data wire, and according to described rank addresses enable signal and described print data signal, determine the voltage of the second electrode being applied to described target piezo-electric device, to produce voltage difference at described target piezo-electric device the two poles of the earth;
Described target piezo-electric device vibrates under described voltage difference effect, outwards sprays ink to control described target printhead or injects ink to described target liq chamber by target liq chamber.
In fluid jetting head provided by the invention and drived control method thereof, multiple print head matrix arrangements that fluid jetting head comprises, and the driving control unit connected one to one with the piezo-electric device of each printhead is comprised by Drive and Control Circuit, two-dimension addressing piezo-electric device being realized to ranks can be realized, thus for matrix arrangement multiple printheads driving implementation is provided.The mode arranged due to multiple print head matrix, relative to prior art linear pattern mode, can utilize the space in shower nozzle more flexibly, make fluid jetting head structure more compact, be conducive to the miniaturization realizing fluid jetting head.In addition, driving pulse of the present invention produces circuit and Drive and Control Circuit is all formed on a silicon substrate, therefore saves the space taken needed for additional configuration drive circuit in shower nozzle, and then is also conducive to the miniaturization realizing fluid jetting head.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the fluid jetting head that Fig. 1 provides for the embodiment of the present invention one;
Fig. 2 is the structural representation of Drive and Control Circuit in Fig. 1;
The schematic diagram of the driving pulse generation circuit that Fig. 3 provides for the invention process two;
Fig. 4 is the waveform example of print signal in Fig. 3;
The circuit diagram of the driving control unit that Fig. 5 provides for the invention process three;
The drived control method flow diagram of the fluid jetting head that Fig. 6 provides for the embodiment of the present invention four.
Reference numeral:
1-silicon substrate; 21-liquid chamber; 22-piezo-electric device;
23-ink-feed channel; 22a-piezoelectric element; 22b-vibration isolation protective layer;
24-goes out ink passage; 26-is electrically connected via hole; 25-circuit isolation protective layer;
221-first electrode; 222-piezoelectric layer; 223-second electrode;
3-drive circuit; 321-data wire; 31-driving pulse produces circuit;
32-Drive and Control Circuit; 322-driving control unit; 311-first constant-current circuit;
323-regional choice line; 324-reference voltage line; 312-second constant-current circuit;
313-phase inverter; 3221-first address wire; 3223-first address transistor;
3222-second address wire; 3226-divider resistance; 3227-driving transistors;
3224-second address transistor; 3225-data transistor; 3228-memory capacitance;
3229-selects transistor.
Detailed description of the invention
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The structural representation of the fluid jetting head that Fig. 1 provides for the embodiment of the present invention one.Fluid jetting head as shown in Figure 1 comprises: silicon substrate 1, drive circuit 3 and multiple printhead; Drive circuit 3 and printhead are respectively formed on silicon substrate 1.
Multiple printhead is matrix arrangement.Arbitrary printhead comprises: liquid chamber 21 and a piezo-electric device 22; The bottom of liquid chamber 21 to be formed on silicon substrate 1 and to be formed with the ink-feed channel 23 with liquid chamber 21 conducting, top be formed with liquid chamber 21 conducting go out ink passage 24; Piezo-electric device 22 is arranged in liquid chamber 21, wherein, at least one end of piezo-electric device 22 and the sidewall of liquid chamber 21 affixed, by the vibration of piezo-electric device 22, control liquid chamber 21 and outwards spray ink through going out ink passage 24 or inject ink through ink-feed channel 23 to liquid chamber 21.Piezo-electric device 22 can comprise piezoelectric element 22a further; Piezoelectric element 22a comprises: the first electrode 221 stacked gradually, piezoelectric layer 222 and the second electrode 223; When applying voltage to the first electrode 221 and the second electrode 223, the voltage difference formed between the first electrode 221 and the second electrode 223 drives piezoelectric element 22a to vibrate.
Drive circuit 3 comprises: driving pulse produces circuit and Drive and Control Circuit, wherein:
Driving pulse produces circuit and is connected with the first electrode 221 of the piezo-electric device 22 of each printhead respectively, applies driving pulse voltage for the first electrode 221 to each piezo-electric device 22.
The structural representation of Drive and Control Circuit 32 as shown in Figure 2, specifically comprises: for the data wire 321 of transferring printing data signal and multiple driving control unit 322 of connecting one to one with the second electrode 223 of each described piezo-electric device 22.Arbitrary driving control unit 322 is also connected with data wire 321, for obtaining the rank addresses enable signal of the corresponding piezo-electric device 22 connected, and according to the described rank addresses enable signal obtained and described print data signal, determine the voltage of the second electrode 223 being applied to the corresponding piezo-electric device 22 connected, to change the voltage difference at the two poles of the earth of the corresponding piezo-electric device 22 connected.
Multiple print head matrix arrangements that the fluid jetting head that the present embodiment provides comprises, and the driving control unit connected one to one with the piezo-electric device of each printhead is comprised by Drive and Control Circuit, two-dimension addressing piezo-electric device being realized to ranks can be realized, thus for matrix arrangement multiple printheads driving implementation is provided.The mode arranged due to multiple print head matrix, relative to prior art linear pattern mode, can utilize the space in shower nozzle more flexibly, make fluid jetting head structure more compact, be conducive to the miniaturization realizing fluid jetting head.In addition, the driving pulse of the present embodiment produces circuit and Drive and Control Circuit is all formed on a silicon substrate, therefore saves the space taken needed for additional configuration drive circuit in shower nozzle, and then is also conducive to the miniaturization realizing fluid jetting head.
On the basis of technique scheme, multiple printheads of fluid jetting head can be divided into groups, concrete packet mode is unrestricted, such as: can adopt and to divide equally or non-equal grading mode divides into groups.The drived control of grouping printhead can be carried out to fluid jetting head, to improve the flexibility of addressing speed and control under this situation.Concrete, the Drive and Control Circuit in drive circuit 3 also can comprise: for many regional choice lines of transfer printing head enable signal; Grouping printhead shares a regional choice line and carrys out transfer printing head enable signal, each driving control unit that each piezo-electric device correspondence namely often organizing printhead connects, and is connected with same regional choice line.
On the basis of technique scheme, in order to protect exposed drive circuit 3, can be formed with circuit isolation protective layer 25 on drive circuit 3, piezo-electric device 22 is formed on circuit isolation protective layer 25; Circuit isolation protective layer 25 is also formed with electrical connection via hole 26, drive circuit 3 is by the Electrode connection of electrical connection via hole 26 with piezo-electric device 22.Concrete, circuit isolation protective layer 25 is formed with the first electrical connection via hole and the second electrical connection via hole, driving pulse is produced circuit and is connected with the first electrode 221 of each piezo-electric device 22 respectively by the first electrical connection via hole; Driving control unit is connected with the second electrode 223 of corresponding piezo-electric device 22 by the second electrical connection via hole.
Optionally, in order to protect piezoelectric element, piezo-electric device 22 also comprises the vibration isolation protective layer 22b being coated on piezoelectric element 22a outer surface; Vibration isolation protective layer 22b plays a role as oscillating plate, concrete, while there is vibration under the voltage difference effect that the piezoelectric layer 222 of piezoelectric element 22a applies at the two poles of the earth, drives vibration isolation protective layer 22b to vibrate together.Under this situation; first electrical connection via hole and the second electrical connection via hole penetrate vibration isolation protective layer 22b; second electrical connection via hole can be opened in circuit isolation protective layer 25 and the first nonoverlapping region of electrode 221; produce circuit to make the driving pulse in drive circuit 3 to be connected with the first electrode 221 of piezo-electric device 22 by the first electrical connection via hole, the connecting line of the Drive and Control Circuit in drive circuit 3 can be connected with the second electrode 223 of piezo-electric device 22 through the second electrical connection via hole.
Optionally, piezo-electric device 22 can be set to cantilever beam structure.Such as: one end of piezo-electric device 22 and the sidewall being fixedly connected on liquid chamber 21, the other end stretches into and unsettled in liquid chamber 21; In the two ends of i.e. piezo-electric device 22, one end is stiff end, and the other end is movable end.The benefit of design like this is, when the two poles of the earth of piezo-electric device are formed with voltage difference, the Oscillation Amplitude of piezo-electric device movable end of the present invention, in hinge structure, to be the Oscillation Amplitude of the piezo-electric device of stiff end larger at two ends, therefore, when obtaining identical Oscillation Amplitude, the power consumption needed for piezo-electric device of the present invention is less.
The schematic diagram of the driving pulse generation circuit that Fig. 3 provides for the invention process two.As shown in Figure 3, driving pulse generation circuit 31 comprises: input IN, electric capacity C, charging control circuit, charge/discharge control circuit and output OUT.
Input IN is for receiving outside print signal.The print signal of outside input can be specially periodic square wave signal, and as shown in Figure 4, pulse width is Tc.Electric capacity C is used for the discharge and recharge that hockets.Charging control circuit is used for when the rising edge of print signal arrives, and control capacitance C charges.Charge/discharge control circuit is used for when the trailing edge of print signal arrives, and control capacitance C discharges.Output OUT is used for exporting to the first electrode of each piezo-electric device or amplifying the voltage at output capacitance C two ends.Concrete:
Charging control circuit can comprise: the first triode Q1, the second triode Q2, the 3rd triode Q3, the first resistance R1 and the 3rd resistance R3.Wherein: the base stage of the first triode Q1 is connected with input IN, colelctor electrode is connected with one end of the 3rd resistance R3, grounded emitter; The other end of the 3rd resistance R3, is connected with the parallel connection point of the colelctor electrode of the 3rd triode Q3 and the base stage of the second address transistor Q2; The emitter stage of the second triode Q2 is connected with high voltage reference line VH through the first resistance R1, and colelctor electrode is connected with one end of electric capacity C, the other end ground connection of electric capacity C; The base stage of the 3rd triode Q3 is connected with the series connection point of the first resistance R1 and the second triode Q2, and emitter stage is connected with high voltage reference line VH;
Charge/discharge control circuit can comprise: the 4th triode Q4, the 5th triode Q5 and the second resistance R2; Charge/discharge control circuit also can comprise phase inverter 313.Wherein: the input of phase inverter 313 is connected with input IN, output is connected with the parallel connection point of the base stage of the 4th triode Q4 and the colelctor electrode of the 5th triode Q5; The emitter stage of the 4th triode Q4 is through the second resistance R2 ground connection, and colelctor electrode is connected with one end of electric capacity C, the other end ground connection of electric capacity C; The base electrode of the 5th triode Q5 is connected with the series connection point of the emitter stage of the 4th triode Q4 and the second resistance R2, grounded emitter;
If output OUT output is the voltage of electric capacity C both end voltage after amplifying, then driving pulse generation circuit 31 also can comprise: the 6th triode Q6 and the 7th triode Q7.Wherein, the base stage of the 6th triode Q6 is connected with one end of memory capacitance C with the parallel connection point of the base stage of the 7th triode Q7, the other end ground connection of memory capacitance; The colelctor electrode of the 6th triode Q6 connects high voltage reference line VH; The grounded collector of the 7th triode Q7; The point in parallel of the emitter stage of the 6th triode Q6 and the emitter stage of the 7th triode Q7, is connected with output OUT.
The course of work that driving pulse as shown in Figure 3 produces circuit is as follows:
Print signal Tc is inputted from input IN.
When the rising edge of print signal Tc arrives, charging control circuit works, concrete: the first triode Q1 conducting, second triode Q2 conducting, electric current flows to electric capacity C by the first resistance R1, make the voltage VBE3 that the voltage at the first resistance R1 two ends equals between the base stage of the 3rd triode Q3 and emitter stage, the 3rd triode Q3 conducting.Like this, the 3rd triode Q3, the first resistance R1 and the second triode Q2 are just equivalent to a constant-current circuit, and might as well be called that the electric capacity C that the first constant-current circuit 311, first constant-current circuit 311 flows to electric capacity C remains on steady state value, electric capacity C starts charging.In electric capacity C charging process, the voltage linear at electric capacity C two ends increases, and the voltage at electric capacity C two ends is after the 6th triode Q6 and the 7th triode Q7 amplifies, and outputs to the first electrode of the piezo-electric device of each printhead through output OUT.If Drive and Control Circuit provides constant low pressure to the second electrode of piezo-electric device, as ground voltage, then between the two poles of the earth of piezo-electric device, be formed with voltage difference, this voltage difference drives the movable end of piezo-electric device to liquid chamber top curved; Voltage difference is larger, and the degree that piezo-electric device is bending is larger; At the movable end of piezo-electric device in the process of liquid chamber top curved, the volume between piezo-electric device and liquid chamber top reduces, thus makes the ink in liquid chamber from going out ink passage ejection, realizes inkjet printing; Meanwhile, at the movable end of piezo-electric device in the process of liquid chamber top curved, the volume between bottom piezo-electric device and liquid chamber increases, thus the ink of outside print cartridge is injected in liquid chamber by ink-feed channel.
When the trailing edge of print signal Tc arrives, charge/discharge control circuit works, concrete: the 4th triode Q4 conducting, and electric capacity C is discharged by the second resistance R2, make the voltage VBE5 that the voltage at the second resistance R2 two ends equals between the base stage of the 5th triode Q5 and emitter stage, the 5th triode Q5 conducting.Like this, the 4th triode Q4, the second resistance R2 and the 5th triode Q5 are just equivalent to a constant-current circuit, might as well be called the second constant-current circuit 312; The electric current of releasing through the second constant-current circuit 312 from electric capacity C remains on steady state value, the voltage linear at electric capacity C two ends reduce and the voltage at electric capacity C two ends after the 6th triode Q6 and the 7th triode Q7 amplifies, output to the first electrode of the piezo-electric device of each printhead through output OUT.If Drive and Control Circuit provides constant low pressure to the second electrode of piezo-electric device, as ground voltage, then along with output OUT is to the continuous reduction of the voltage of the first electrode output of piezo-electric device, voltage difference between piezo-electric device the two poles of the earth is corresponding reduction also, the movable end of piezo-electric device moves along the bottom direction of liquid chamber, reduce its degree of crook gradually, until the voltage difference at piezo-electric device the two poles of the earth is zero, piezo-electric device replys initial natural extended configuration.
It is simple that the driving pulse that the present embodiment provides produces circuit structure, and cost is low, can provide public driving pulse voltage to the piezo-electric device of each printhead.After Drive and Control Circuit completes the addressing of piezo-electric device, target piezo-electric device can vibrate under the control of driving pulse voltage, drive liquid chamber periodically ink-jet and the blotting of target printhead, and then the continous inkjet of realize target printhead prints.
The circuit diagram of the driving control unit that Fig. 5 provides for the invention process three.As shown in Figure 5, driving control unit 322 comprises: the first address wire 3221, second address wire 3222, first address transistor 3223, second address transistor 3224, data transistor 3225, divider resistance 3226 and driving transistors 3227.Wherein:
First address wire 3221 is for transmitting piezo-electric device row address enable signal; Second address wire 3222 is for transmitting piezo-electric device column address enable signal; The signal that first address transistor 3223 inputs for responding the first address wire 3221; The signal that second address transistor 3224 inputs for responding the second address wire 3222; The signal that data transistor 3225 inputs for response data line 321.
Concrete, the grid of the first address transistor 3223 is connected with the first address wire 3221, and the grid of the second address transistor 3224 is connected with the second address wire 3222, and the grid of data transistor 3225 is connected with data wire 321; The drain-source path of the first address transistor 3223, the drain-source path of the second address transistor 3224 are in parallel with the drain-source path of data transistor 3225; Divider resistance 3226 be serially connected in the grid of driving transistors 3227 and Drive and Control Circuit for transmit reference voltage reference voltage line 324 between; The grid of driving transistors 3227 is also connected with the drain-source path parallel connection point of the first address transistor 3223, second address transistor 3224 and data transistor 3225; The drain-source path of driving transistors 3227 is serially connected between the second electrode of piezo-electric device 22 and ground signalling line.
The grid of driving transistors 3227 forms memory capacitance 3228, and this memory capacitance 3228 works as memory component, and memory node electric capacity 3228 is shown in broken lines, because it is a part for driving transistors 3227.Alternatively, also an independent component can be connected in series as this memory capacitance 3228 between the grid and ground signalling line of driving transistors 3227.
On the basis of technique scheme, drive if multiple printheads of Drive and Control Circuit to fluid jetting head carry out grouping, Drive and Control Circuit comprises the regional choice line driving enable signal for transfer printing head, then driving control unit also can comprise; Select transistor 3229.Transistor 3229 is selected to select the signal of line transmission for response region.Concrete, select the grid of transistor 3229 to be connected with regional choice line 323; Select the drain-source path of transistor 3229, between the drain-source path of the grid being serially connected in driving transistors 3227 and the first address transistor 3223, second address transistor 3224 and data transistor 3225 is in parallel.
The course of work of Drive and Control Circuit is as shown in Figure 5 as follows:
On reference voltage line 324, transmission is with reference to high pressure VH; Data wire 321 transmits print data signal; Regional choice line 323 corresponding with printing target area in Drive and Control Circuit transmits printhead enable signal; In multiple printhead, determine target printhead according to printing target area, and obtain the rank addresses of the piezo-electric device of this printhead; According to the rank addresses of this piezo-electric device, the first address wire 3221 and the second address wire 3222 of the driving control unit 322 that connect corresponding to this piezo-electric device in Drive and Control Circuit, respectively line of input address enable signal and column address enable signal.
When transmission represents the high-voltage signal of printhead enable signal on regional choice line 323, select transistor 3229 conducting, illustrate that printhead corresponding to current driving control unit is addressed printhead; When in the first address wire 3221, transmission represents the low-voltage signal of row address enable signal, the first address transistor 3223 ends; When in the second address wire 3222, transmission represents the low-voltage signal of column address enable signal, the second address transistor 3224 ends; When data wire 324 transmits the low-voltage signal representing print data signal, data transistor 3225 ends.When the first address transistor 3223 and the second address transistor 3224 all end, the piezo-electric device that current driving control unit correspondence connects is described, is addressed piezo-electric device; When data transistor cut-off, illustrate to there are data to be printed.
Under the prerequisite selecting transistor 3229 conducting, if the first address transistor 3224, second address transistor 3225 and data transistor 3226 all end, memory capacitance 5 is charged, driving transistors 3227 conducting, now, be serially connected in the drain-source path of the driving transistors 3227 between the second electrode of piezo-electric device 22 and ground signalling line, the second electrode be equivalent to for piezo-electric device 22 provides constant ground voltage, if driving pulse produces the first electrode output higher driving pulse voltage of output OUT to piezo-electric device of circuit, then can be poor at the two poles of the earth coating-forming voltage of this piezo-electric device 22, this voltage difference drives piezo-electric device 22 to vibrate, corresponding printhead carries out inkjet printing.
If the first address transistor 3224, at least one transistor turns in second address transistor 3225 and data transistor 3226, and/or select transistor 3229 to end, then memory capacitance 5 is discharged, driving transistors 3227 ends, now, be serially connected in the drain-source path of the driving transistors 3227 between the second electrode of piezo-electric device 22 and ground signalling line, be equivalent to for the second electrode of piezo-electric device 22 provides constant high-order voltage, if driving pulse produces the first electrode output higher driving pulse voltage of output OUT to piezo-electric device of circuit, then can not be poor at the two poles of the earth coating-forming voltage of this piezo-electric device 22, therefore this piezo-electric device 22 can not vibrate, corresponding printhead does not carry out inkjet printing.
As can be seen here, the Drive and Control Circuit structure that the present embodiment provides is simple and easy to realize; This circuit is only all correct and under there is the condition of print data in region addressing and piezo-electric device addressing, just can provide low pressure to the second electrode of piezo-electric device 22, produce together with the driving pulse voltage that circuit output end OUT exports with driving pulse, produce voltage difference at the two poles of the earth of piezo-electric device 22, thus drive corresponding piezo-electric device to vibrate; Otherwise piezo-electric device does not vibrate.Therefore, the present embodiment can accurately addressing, improves the accuracy of printing, and the grouping that the present embodiment carries out printhead by printhead enable signal controls, and therefore also helps the speed improving addressing, and then improves print speed.
The drived control method flow diagram of the fluid jetting head that Fig. 6 provides for the embodiment of the present invention four.Method as shown in Figure 6 comprises:
Step 61: the first electrode of the piezo-electric device of each printhead in multiple printheads of the matrix arrangement comprised to fluid jetting head, applies driving pulse respectively and produces the driving pulse voltage that circuit exports.
Step 62: transmit print data signal on the data wire of Drive and Control Circuit.
Step 63: determine target printhead according to the printing target area obtained in advance in described multiple printhead, and obtain the rank addresses of the target piezo-electric device of described target printhead; According to the rank addresses of described target piezo-electric device, the target drives control unit line of input column address enable signal that connect corresponding to described target piezo-electric device in described Drive and Control Circuit.
Step 64: described target drives control unit receives described print data signal by described data wire, and according to described rank addresses enable signal and described print data signal, determine the voltage of the second electrode being applied to described target piezo-electric device, to produce voltage difference at described target piezo-electric device the two poles of the earth.
Step 65: described target piezo-electric device vibrates under described voltage difference effect, outwards sprays ink by target liq chamber to control described target printhead or injects ink to described target liq chamber.
On the basis of technique scheme, in order to improve the flexibility of addressing speed and control, the drived control method of fluid jetting head also can comprise: target area corresponding with described printing target area in described Drive and Control Circuit is selected line transmits target printhead enable signal; Described target drives control unit selects line to receive described target printhead enable signal by described target area.Accordingly, above-mentioned steps 64 specifically can be: when described target drives control unit receives described target printhead enable signal, according to rank addresses enable signal and the described print data signal of described target piezo-electric device, determine the voltage of the second electrode being applied to described target piezo-electric device, to produce voltage difference at described target piezo-electric device the two poles of the earth.
The drived control method of the fluid jetting head that the present embodiment provides can according to printing target area, to multiple printhead procession two-dimension addressings of matrix arrangement, drive the piezo-electric device vibration of the target printhead be addressed to realize inkjet printing, thus provide attainable type of drive for print head matrix multiple in fluid jetting head arranges.Because the mode of the multiple print head matrix arrangements in fluid jetting head is relative to prior art linear pattern mode, the space in shower nozzle can be utilized more flexibly, make fluid jetting head structure more compact, be conducive to the miniaturization realizing fluid jetting head.The fluid jetting head structure of the drived control method that the present embodiment provides and drive circuit realize, and see the record of the corresponding embodiment of Fig. 1-Fig. 5, can not repeat them here.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (9)
1. a fluid jetting head, is characterized in that, comprising:
Silicon substrate, and the driving pulse formed on a silicon substrate produces circuit, Drive and Control Circuit and multiple printhead;
Described multiple print head matrix arrangement; Arbitrary described printhead comprises: a liquid chamber and a piezo-electric device; The bottom of described liquid chamber to be formed on described silicon substrate and to be formed with the ink-feed channel with described liquid chamber conducting, top be formed with described liquid chamber conducting go out ink passage; The sidewall of described piezo-electric device at least one end and described liquid chamber is affixed, controls described liquid chamber outwards spray ink or inject ink to described liquid chamber by the vibration of described piezo-electric device;
Described driving pulse produce circuit respectively with the first Electrode connection of each described piezo-electric device, apply driving pulse voltage for the first electrode to each described piezo-electric device;
Described Drive and Control Circuit comprises: for the data wire of transferring printing data signal and multiple driving control unit of connecting one to one with the second electrode of each described piezo-electric device; Arbitrary described driving control unit is also connected with described data wire, for obtaining the rank addresses enable signal of the corresponding described piezo-electric device connected, and according to the described rank addresses enable signal obtained and described print data signal, determine the voltage of the second electrode being applied to the corresponding described piezo-electric device connected, to change the voltage difference at the two poles of the earth of the corresponding described piezo-electric device connected;
Described Drive and Control Circuit also comprises: for transmitting the reference voltage line of reference voltage;
Arbitrary described driving control unit comprises: for transmit piezo-electric device row address enable signal the first address wire, for transmitting the second address wire of piezo-electric device column address enable signal, the first address transistor, the second address transistor, data transistor, divider resistance and driving transistors;
The grid of described first address transistor is connected with described first address wire, and the grid of described second address transistor is connected with described second address wire, and the grid of described data transistor is connected with described data wire; The drain-source path of described first address transistor, the drain-source path of described second address transistor are in parallel with the drain-source path of described data transistor;
Described divider resistance is serially connected between the grid of described driving transistors and described reference voltage line; The grid of described driving transistors is also connected with the drain-source path parallel connection point of described first address transistor, the second address transistor and data transistor; The drain-source path of described driving transistors is serially connected between the second electrode of described piezo-electric device and ground signalling line.
2. fluid jetting head according to claim 1, is characterized in that,
Described multiple printhead is divided into many groups;
Described Drive and Control Circuit also comprises: for many regional choice lines of transfer printing head enable signal;
The each described driving control unit that each piezo-electric device correspondence often organizing printhead connects, is connected with same described regional choice line.
3. fluid jetting head according to claim 2, is characterized in that,
Arbitrary described driving control unit also comprises: select transistor;
The grid of described selection transistor is connected with described regional choice line;
The drain-source path of described selection transistor, be serially connected in the grid of described driving transistors in parallel with the drain-source path of described first address transistor, the second address transistor and data transistor between.
4. fluid jetting head according to claim 1, is characterized in that,
Arbitrary described driving control unit also comprises: memory capacitance;
Described memory capacitance is serially connected between the grid of described driving transistors and ground signalling line.
5. fluid jetting head according to claim 1 and 2, is characterized in that, in arbitrary described printhead: one end of described piezo-electric device is fixedly connected on a sidewall of described liquid chamber, and the other end stretches into and unsettled in described liquid chamber.
6. fluid jetting head according to claim 1 and 2, is characterized in that,
Described driving pulse produces in circuit and described Drive and Control Circuit and is formed with circuit isolation protective layer, and described piezo-electric device is formed on described circuit isolation protective layer;
Described circuit isolation protective layer is formed with the first electrical connection via hole and the second electrical connection via hole; Described driving pulse produce circuit by described first electrical connection via hole respectively with the first Electrode connection of each described piezo-electric device; Described driving control unit is electrically connected the second Electrode connection of via hole and corresponding described piezo-electric device by described second.
7. fluid jetting head according to claim 1 and 2, is characterized in that, described driving pulse produces circuit and comprises:
Input, for receiving outside print signal;
Electric capacity, for the discharge and recharge that hockets;
Charging control circuit, for when the rising edge of described print signal arrives, controls described electric capacity and charges;
Charge/discharge control circuit, for when the trailing edge of described print signal arrives, controls described electric capacity and discharges;
Output, for exporting to the first electrode of each described piezo-electric device or amplifying the voltage exporting described electric capacity two ends.
8. a drived control method for fluid jetting head, is characterized in that, comprising:
First electrode of the piezo-electric device of each printhead in multiple printheads of the matrix arrangement comprised to fluid jetting head, applies driving pulse respectively and produces the driving pulse voltage that circuit exports;
The data wire of Drive and Control Circuit transmits print data signal;
In described multiple printhead, determine target printhead according to the printing target area obtained in advance, and obtain the rank addresses of the target piezo-electric device of described target printhead; According to the rank addresses of described target piezo-electric device, the target drives control unit line of input column address enable signal that connect corresponding to described target piezo-electric device in described Drive and Control Circuit;
Described target drives control unit receives described print data signal by described data wire, and according to described rank addresses enable signal and described print data signal, determine the voltage of the second electrode being applied to described target piezo-electric device, to produce voltage difference at described target piezo-electric device the two poles of the earth;
Described target piezo-electric device vibrates under described voltage difference effect, outwards sprays ink to control described target printhead or injects ink to described target liq chamber by target liq chamber.
9. drived control method according to claim 8, is characterized in that,
Described drived control method also comprises: target area corresponding with described printing target area in described Drive and Control Circuit is selected line transmits target printhead enable signal; Described target drives control unit selects line to receive described target printhead enable signal by described target area;
Described target drives control unit is according to the rank addresses enable signal of described target piezo-electric device and described print data signal, determine the voltage of the second electrode being applied to described target piezo-electric device, to produce voltage difference at described target piezo-electric device the two poles of the earth, be specially: when described target drives control unit receives described target printhead enable signal, according to rank addresses enable signal and the described print data signal of described target piezo-electric device, determine the voltage of the second electrode being applied to described target piezo-electric device, to produce voltage difference at described target piezo-electric device the two poles of the earth.
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| JP7342529B2 (en) * | 2019-08-30 | 2023-09-12 | セイコーエプソン株式会社 | Drive circuit and liquid ejection device |
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| US6276781B1 (en) * | 1997-09-04 | 2001-08-21 | Seiko Epson Corporation | Liquid jet recording head and manufacturing method therefor, and liquid jet recording head drive circuit and drive method |
| CN1644374A (en) * | 2004-01-21 | 2005-07-27 | 精工爱普生株式会社 | Method of driving droplet jetting head, droplet jetting apparatus, and device manufacturing method |
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| KR20060039111A (en) * | 2004-11-02 | 2006-05-08 | 삼성전자주식회사 | Inkjet prihthead having cantilever actuator |
| JP4022674B2 (en) * | 2005-03-17 | 2007-12-19 | 富士フイルム株式会社 | Liquid discharge head, image forming apparatus, and method of manufacturing liquid discharge head |
| JP5024589B2 (en) * | 2005-12-14 | 2012-09-12 | リコープリンティングシステムズ株式会社 | Droplet discharge device, droplet discharge characteristic correction method, and ink jet recording apparatus |
| JP2010253698A (en) * | 2009-04-21 | 2010-11-11 | Seiko Epson Corp | Drive signal generating circuit, and fluid jetting apparatus |
| JP5310335B2 (en) * | 2009-07-14 | 2013-10-09 | セイコーエプソン株式会社 | Drive signal generation circuit |
| JP2011194640A (en) * | 2010-03-18 | 2011-10-06 | Seiko Epson Corp | Liquid jet device |
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| US6276781B1 (en) * | 1997-09-04 | 2001-08-21 | Seiko Epson Corporation | Liquid jet recording head and manufacturing method therefor, and liquid jet recording head drive circuit and drive method |
| CN1644374A (en) * | 2004-01-21 | 2005-07-27 | 精工爱普生株式会社 | Method of driving droplet jetting head, droplet jetting apparatus, and device manufacturing method |
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