CN1189320C - Driver for ink jet head in printer - Google Patents
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- CN1189320C CN1189320C CNB001242989A CN00124298A CN1189320C CN 1189320 C CN1189320 C CN 1189320C CN B001242989 A CNB001242989 A CN B001242989A CN 00124298 A CN00124298 A CN 00124298A CN 1189320 C CN1189320 C CN 1189320C
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Abstract
The present invention relates to a driving circuit for an ink gun in a printing device. The present invention comprises a plurality of ink jet chambers and corresponding heating elements, wherein the ink jet chambers are used for containing ink and have ink jet holes; the control circuit drives the heating elements according to printing data of the printing device, and the corresponding ink jet chambers supply the energy to heat the printing device. When the energy exceeds a preset threshold value, ink is jetted out for printing. The control circuit comprises a bit shift register and a locking circuit, wherein the locking circuit provides a driving signal generation circuit of a first and a second driving signals for preset and non-preset printing ink jet holes. The first driving signal has the function that the energy of the heating elements exceeds the preset threshold value, so the ink jet chambers are heated in order the ink is jetted out. The second driving signal has the function that the energy of the heating elements is smaller than the preset threshold value, so only the corresponding ink jet chamber is heated in order that the ink is not jetted out.
Description
Invention field
The present invention relates to ink-jet head driving circuit in a kind of printing equipment, fuel factor can equiblibrium mass distribution between particularly a kind of inkjet ink chamber that makes ink-jet or not ink-jet, and then the drive circuit that the sizes of ink dots of ejection is reached unanimity.
Background technology
With reference to Fig. 1, Fig. 1 is the schematic diagram of known ink gun 70.Ink gun 70 includes an ink container 72, a plurality of pipeline 74 and a plurality of inkjet ink chamber 76, ink container 72 is connected with a plurality of inkjet ink chamber 76 by a plurality of pipelines 74, ink in the ink container 72 can be flow in the inkjet ink chamber 76 by pipeline 74 to be deposited, each inkjet ink chamber 76 other heating resistor 78 that are provided with is used for to the heating of the ink in the inkjet ink chamber 76, and 78 of a plurality of heating resistors form a heater circuit 60.The energy that is provided when heating resistor 78 is during greater than a predetermined energy threshold, then can make ink produce bubble 80 and from jet orifice 82 ejections and print, yet what of ink ejection are also relevant with the energy size that heating resistor 78 is provided, the amount of ink ejection is relatively also more when energy is big, therefore ink dot is bigger, relatively also less when the amount of energy hour ink ejection, so ink dot is less.If the inconsistent meeting of sizes of ink dots of ejection makes print quality low, so the energy that heating resistor 78 is provided in the ink gun 70 preferably also can remain on a fixed value except being greater than this energy threshold, make the size of ejection ink dot to be consistent, to keep preferable print quality.
With reference to Fig. 2, Fig. 2 is the schematic diagram of known driver of ink-jet head.Drive circuit 10 includes a row driver module (row driving module) 20, delegation's driver module (column driving module) 40.For example, row driver module 20 can receive four columns according to (row data) 30 inputs, produce four row control signals, R1, R2, R3, R4 export the heater circuit 60 in the ink gun to, row driver module 40 can receive four line data (column data), 50 inputs, produce four capable control signals, C1, C2, C3, C4 export the heater circuit 60 in the ink gun to.Row driver module 20 includes a shift register 22, a lock-in circuit 24 and a start-up circuit 27; Row driver module 40 includes a shift register 42, a lock-in circuit 44 and a start-up circuit 47.Row driver module 20 is shared identical clock signal 32, locking signal 34 and enabling signal 39 with row driver module 40.
Shift register the 22, the 42nd, according to the control of a clock signal 32,0 and 1 print data that is used for receiving printing equipment in proper order and is sent, lock-in circuit 24,14 then locks print data and be stored in the lock-in circuit 24,44 according to a locking signal 34.Start-up circuit 27,47 mainly is made up of 37 of a plurality of AND gates (AND Gate), and according to an enabling signal 39 heater circuit 60 in the ink gun is begun a plurality of inkjet ink chamber heating.Heater circuit 60 includes the data wire of a plurality of row and row and lines up the shape of matrix, each column data line and line data line handing-over part are a heating resistor and a transistor switch, respectively by separately row control signal, R1, R2, R3, R4 and row control signal, C1, C2, C3, C4 are controlled, wherein, the row control signal, R1, R2, R3, R4 are the drain electrodes (Drain) that is connected to each transistor switch by a resistance, and the row control signal, C1, C2, C3, C4 then are connected to the grid (Gate) of each transistor switch.When the data wire of a certain particular row and a certain particular column is activated simultaneously, can make and be switched on respect to the transistor of these row with the data wire of row, make the electric current corresponding heating resistor of flowing through,, make its ink inside be heated and spray so corresponding inkjet ink chamber is heated.
With reference to Fig. 3, Fig. 3 is the sequential chart that known ink gun drives signal.Below be that example is illustrated known ink-jet head driving mode with Fig. 3.Between time T 0 to T1, four columns can be imported in the shift register 22,42 by the control of clock signal 32 in proper order according to 30 and four line data 50, when the pulse of locking signal 34 produced, four columns were stored in lock-in circuit 24,44 according to 0 and 1 bit of 30 and four line data 50 with regard to locking respectively.When the pulse of time T 1 enabling signal 39 between T2 produces, the AND gate 37 of start-up circuit 27 can according to the columns that is locked in the lock-in circuit 24 according to 30 with line data 50 its positions be 0 and 1, determine whether exporting the pulse of corresponding enabling signal 39.For example, between time T 0 to T1, columns is according to 30 (R1, R2, R3, R4)=(1,0,0,0), and line data 50 (C1, C2, C3, C4)=(1,0,1,0), when therefore the pulse of enabling signal 39 produces between time T 1 row T2, column data line R1 and line data line C1, C3 is activated, make transistor 62,64 conductings, so heating resistor 66,68 have electric current to flow through, and make corresponding inkjet ink chamber be heated and spray ink, and the transistor that other are not activated is not owing to be switched on, and its corresponding heating resistor does not have electric current to flow through, so its corresponding inkjet ink chamber can not be heated.
Though, important parameter that whether can be when expectedly spraying ink and be design driven circuit 10 when inkjet ink chamber is heated, however the size of inkspot that inkjet ink chamber sprays is the key factor of decision print quality equally.Whether sizes of ink dots also has been heated before relevant with inkjet ink chamber except the energy size that is provided with present heating resistor is relevant.If inkjet ink chamber was heated before this is heated because the relation of energy accumulation, then at the cumlative energy of inkjet ink chamber ink inside originally just than higher, the ink dot of ejection also can be bigger.That is to say that if with the two inkjet ink chamber heating of identical energy to not being heated and being heated before, the former ink dot can be smaller, the latter's ink dot then can be bigger.Therefore the drive circuit with prior art comes the ink gun heating, because the heat distribution of each inkjet ink chamber is inhomogeneous in the ink gun, therefore causes the inconsistent situation of sizes of ink dots easily.
Summary of the invention
Because the problems referred to above, main purpose of the present invention is to provide ink-jet head driving circuit in a kind of printing equipment, make between the inkjet ink chamber of ink-jet or not ink-jet the fuel factor can equiblibrium mass distribution, and then can make the drive circuit of the sizes of ink dots unanimity of ejection, to address the above problem.
The ink-jet head driving circuit is improved in the driving printing equipment owing to The present invention be directed to, part as for ink gun is then similar with the known ink gun of Fig. 1, therefore the structure in the ink gun is not described in detail once more with next, and the introduction that emphasis is placed different embodiment drive circuits, if needed can be with reference to the schematic diagram of Fig. 1 ink gun.
For achieving the above object, the invention provides a kind of ink-jet head driving circuit in the printing equipment that is used for driving, this ink gun includes a plurality of inkjet ink chamber and corresponding a plurality of heating element heater, each inkjet ink chamber can ccontaining ink therein, and has a jet orifice, this drive circuit can provide energy with to its heating to drive these a plurality of heating element heaters to corresponding inkjet ink chamber according to print data that this printing equipment sent, and ink is printed from this jet orifice ejection, this drive circuit includes: a drive signal generation circuit, can be according to this print data so that at least two kinds of different corresponding driving signals to be provided, this drive signal generation circuit includes: a multiplexer, include at least one selected cell and be used to provide this first driving signal, and at least one selected cell is used to provide this second driving signal; Wherein this drive signal generation circuit can provide this first driving signal for the predetermined jet orifice that prints, this first drives signal and can make energy that corresponding heating element heater provides greater than a predetermined power threshold value, and heat this inkjet ink chamber and make this jet orifice ejection ink, when this drive signal generation circuit provides this first driving signal for the predetermined jet orifice that prints, this drive signal generation circuit also can provide this second to drive signal for the non-predetermined jet orifice that prints, this second drives signal and can make energy that corresponding heating element heater provides less than this predetermined power threshold value, therefore only corresponding inkjet ink chamber is heated and can not make its jet orifice ejection ink.For further understanding purpose of the present invention, feature and advantage describe in detail below with reference to accompanying drawing.
Description of drawings
Fig. 1 is the schematic diagram of known ink gun.
Fig. 2 is the schematic diagram of known driver of ink-jet head.
Fig. 3 is the sequential chart that known ink gun drives signal.
Fig. 4 is the schematic diagram of the driver of ink-jet head of first embodiment of the invention.
Fig. 5 is the sequential chart that the ink gun of first embodiment of the invention drives signal.
Fig. 6 is the schematic diagram of the driver of ink-jet head of second embodiment of the invention.
Fig. 7 is the schematic diagram of the driver of ink-jet head of third embodiment of the invention.
Fig. 8 is the sequential chart that the ink gun of third embodiment of the invention drives signal.
Fig. 9 is the schematic diagram of the driver of ink-jet head of fourth embodiment of the invention.
Figure 10 is the sequential chart that the ink gun of fourth embodiment of the invention drives signal.
Figure 11 is the schematic diagram after the driver of ink-jet head of known technology heats ink gun.
Figure 12 is the schematic diagram after driver of ink-jet head of the present invention heats ink gun.
Figure 13 cooperates the functional block diagram of a temperature detection reponse system for driver of ink-jet head of the present invention.
Specific embodiment
With reference to Fig. 4, Fig. 4 is the schematic diagram of the driver of ink-jet head 100 of first embodiment of the invention.Drive circuit includes a row driver module (row driving module) 120, delegation's driver module (column driving module) 140.For convenience of description, the present invention is that example is illustrated with 4 * 4 drive circuits, that is to say, row driver module 120 can receive four columns according to (row data) 130 inputs, produce four row control signals, R1, R2, R3, R4 export the heater circuit 160 in the ink gun to, and row driver module 140 can receive four line data (column data), 150 inputs, produce four capable control signals, C1, C2, C3, C4 export the heater circuit 160 in the ink gun to.And row driver module 120 all includes a shift register 122,142, one lock-in circuits 124,144 respectively with row driver module 140, and a drive signal generation circuit 125,145.Include a multiplexer 126 and a start-up circuit 127 in the drive signal generation circuit 125; Include a multiplexer 146 and a start-up circuit 147 in the drive signal generation circuit 145.Row driver module 120 is that shared identical clock signal 132, locking signal 134, first drive signal 135, second driving signal 138 and the enabling signal 139 with row driver module 140.
The part of row driver module 120 at first is discussed.Shift register 122 is the control according to a clock signal 132, and the print data that is used for receiving printing equipment in proper order and is sent is that form with the position is sent to shift register 122 in this print data, therefore 0 and 1 numerical data just.Lock-in circuit 124 then locks 0 and 1 print data and be stored in the lock-in circuit 124 according to a locking signal 134.Drive signal generation circuit 125 main functions are to provide at least two kinds of different corresponding driving signals according to 0 with 1 print data, kenel according to the driving signal that is produced, drive signal generation circuit 125 can have various circuit embodiment, for example in the present embodiment, drive signal generation circuit 125 includes a multiplexer 126 and a start-up circuit 127.126 of multiplexers include four selected cells 136, and each selected cell 136 can be according to print data for 1 or 0 to provide corresponding first to drive signal 135 or second and drive signal 138 as exporting.127 of start-up circuits are according to an enabling signal 139 heater circuit 160 to be begun a plurality of inkjet ink chamber heating, start-up circuit 127 in fact mainly is made up of a plurality of AND gate 137, and the input of each AND gate 137 is from the output of corresponding selected cell 136 and above-mentioned enabling signal 139.Include a plurality of heating element heaters 162 in the heater circuit 160 in the ink gun, each heating element heater can first be driven signal 135 or second and drives 138 pairs of corresponding inkjet ink chamber of signal and provide energy with to its heating by what start-up circuit 127 transmitted according to multiplexer 126.The function mode and row driver module 120 function modes of row driver module 140 are identical, do not repeat them here.
Drive the signal 135 or the second driving signal 138 as for a specific inkjet ink chamber being provided first, depend on then this moment, whether the predetermined jet orifice of this inkjet ink chamber that allows sprayed ink, as before described, offer the energy of jet orifice must be greater than a predetermined energy threshold time, ink is sprayed from jet orifice.Therefore can do following design, when providing first to drive signal 135, inkjet ink chamber can receive more energy and surpass this energy threshold, therefore jet orifice can spray ink, otherwise, when providing second to drive signal 138, the energy that inkjet ink chamber receives is less and do not surpass this energy threshold, so jet orifice can not spray ink.
With reference to Fig. 5, Fig. 5 is the sequential chart that the ink gun of first embodiment of the invention drives signal.Between time T 0 to T1, four columns can be imported respectively in the shift register 122,142 by the control of clock signal 132 in proper order according to 130 and four line data 150, when the pulse of locking signal 134 produces, four columns according to 0 and 1 position of 130 and four line data 150 just respectively locking be stored in lock-in circuit 124,144, and export in multiplexer 126, the 146 corresponding selected cells 136,156.Between time T 1 to T2, the pulse of enabling signal 139 produces, and can make the AND gate of start-up circuit 127,147 export corresponding first and drive signal 135 or second and drive signal 138 to the heater circuit 160 of ink gun.In the present embodiment, the first driving signal 135 and second drives signal 138 and is all potential pulse, and the voltage of the first driving signal 135 is big than the voltage of the second driving signal 138, and the energy that the first driving signal 135 is provided is big than the energy that the second driving signal 138 is provided.That is to say, receiving second inkjet ink chamber that drives signal 138 can be heated on the one hand, make it can dwindle with receiving the first fuel factor gap that drives the inkjet ink chamber of signal 135, on the one hand again because of the energy that receives as yet not greater than this energy threshold, so jet orifice can not missed ink-jet water.
With reference to Fig. 6, Fig. 6 is the schematic diagram of the driver of ink-jet head 200 of second embodiment of the invention.The element major part of the drive circuit 200 of Fig. 6 and the drive circuit 100 of Fig. 4 is identical, unique difference is in the start-up circuit 227 of drive circuit 200 in fact mainly to be made up of 237 of a plurality of switch elements (SwitchingElement), switch element 237 can be a common element as switch on the circuit such as BJT or MOS in fact for example, and the input of each switch element 237 remains the output from enabling signal and corresponding selected cell 236.That is to say that the switch element 237 of start-up circuit 227 all is identical with the function that the AND gate 137 of start-up circuit 127 will be reached, is some difference of choosing of technology or element.
With reference to Fig. 7, Fig. 7 is the schematic diagram of the driver of ink-jet head 300 of third embodiment of the invention.The element major part of the drive circuit 300 of Fig. 7 and the drive circuit 100 of Fig. 4 is identical, and it is different that difference is in the element that drive signal generation circuit 125 is formed in drive circuit 300 drive signal generation circuit 325 and the drive circuit 100.Because the function mode of row driver module 320 is identical with the function mode of row driver module 340, below the mode of operation of row driver module 320 is only described.Include a plurality of pulse width selected cells 326 in the drive signal generation circuit 325, each pulse width selected cell 326 acceptable input source has three: 1 or 0 print data, first from lock-in circuit 324 drives the signal 335 and the second driving signal 338.Pulse width selected cell 326 includes one first AND gate 327, one second AND gate 328 and one or door 329.The input of first AND gate 327 is print data and first driving signals 335 of 1 or 0, the input of second AND gate 328 is to drive signal 338 through anti-phase 1 or 0 print data and second, or the input of door 329 then is the output of first AND gate 327 and second AND gate 328, and therefore can produce a corresponding row or column control signal, R1, R2, R3, R4, C1, C2, C3, C4 export the heater circuit 360 of ink gun to.
With reference to Fig. 8, Fig. 8 is the sequential chart that the ink gun of third embodiment of the invention drives signal.And the second driving signal 338 is all potential pulse and voltage swing is identical for the first driving signal 335 in the present embodiment.But the pulse width of the first driving signal 335 is wide than the pulse width of the second driving signal 338, so the energy that the first driving signal 335 is provided is big than the energy that the second driving signal 338 is provided.That is to say, why the energy that the first driving signal 335 and second drives signal 338 to be provided has difference, be because due to its pulse width difference, therefore in the present embodiment, can be by suitably designing both pulse widths, make first to drive energy that signal 335 provided greater than this energy threshold, therefore can make jet orifice ejection ink, and make second to drive energy that signal 338 provided less than this energy threshold, therefore only be enough to the ink temperature in the inkjet ink chamber is risen to a certain degree, but deficiency is so that jet orifice ejection ink.
With reference to Fig. 9, Fig. 9 is the schematic diagram of the driver of ink-jet head 400 of fourth embodiment of the invention.The element major part of the drive circuit 400 of Fig. 9 and the drive circuit 100 of Fig. 4 is identical, and it is different that difference is in the element that drive signal generation circuit 125 is formed in drive circuit 400 drive signal generation circuit 425 and the drive circuit 100.Because the function mode of row driver module 420 is identical with the function mode of row driver module 440, below the mode of operation of row driver module 420 is only described.Drive signal generation circuit 425 includes a plurality of heating pulse generation units 426, and each pulse generation unit 426 acceptable input source has three: from 1 or 0 print data, first heating pulse 435 and second heating pulse 438 of lock-in circuit 424.Pulse generation unit 426 include an AND gate 427 and one or the door (Or Gate) 429, the input of AND gate 427 is print data and second heating pulse 438 of 1 or 0, or the input of door 429 then is the output and first heating pulse 435 of AND gate 427, and therefore can produce a corresponding column or row control signal, R1, R2, R3, R4, C1, C2, C3, C4 export the heater circuit 460 of ink gun to.
With reference to Figure 10, Figure 10 is the sequential chart that the ink gun of fourth embodiment of the invention drives signal.First heating pulse 435 is a preheat pulse in the present embodiment, its objective is to making all inkjet ink chamber no matter whether predetermined ejection ink all through the preheating of first heating pulse 435, because the energy that first heating pulse 435 is provided less than this energy threshold, therefore only can reach the purpose of heating and can't make jet orifice ejection ink.And have only the real predetermined inkjet ink chamber that will spray ink just can receive the heating of second heating pulse 438, when these predetermined inkjet ink chamber that will spray ink receive the heating of first heating pulse 435 and the second heating pulse wave 438 simultaneously, the gross energy of its reception can surpass this predetermined power threshold value, therefore can make jet orifice ejection ink.
With reference to Figure 11 and Figure 12, Figure 11 is the schematic diagram after the driver of ink-jet head of known technology heats ink gun, and Figure 12 is the schematic diagram after driver of ink-jet head of the present invention heats ink gun.After with known driver of ink-jet head ink gun being heated as seen from Figure 11, have only the predetermined inkjet ink chamber that will spray ink to be heated, represent with dark circle in the drawings, but not the inkjet ink chamber of predetermined ejection ink then can not be heated, represent with white circle in the drawings, as mentioned above, this known ink gun type of drive causes the inconsistent situation of sizes of ink dots easily.And review Figure 12, with driver of ink-jet head of the present invention to after the ink gun heating, be scheduled to spray the inkjet ink chamber of ink to be heated with known identical mode, represent with dark circle in the drawings, but not the inkjet ink chamber of predetermined ejection ink is represented with ruling shape circle in the drawings then also by appropriate heating, thus, because each inkjet ink chamber is all by appropriate heating in the ink gun, so heat distribution is comparatively even, makes the big I of ejection ink dot reach unanimity.
Since known technology only to the predetermined inkjet ink chamber that will spray ink with first drive and the energy heating is provided, then can not provide any driving signal for the inkjet ink chamber of non-predetermined ejection ink, therefore can not be heated yet.Comparatively speaking, drive circuit of the present invention then to the inkjet ink chamber of non-predetermined ejection ink with less second drive of energy and the energy heating is provided, therefore can make heat distribution comparatively even, the big I of ejection ink dot reaches unanimity.Yet as previously mentioned, whether sizes of ink dots also has been heated before relevant with inkjet ink chamber except the energy size that is provided with present heating is relevant.If an inkjet ink chamber was heated before this is heated, because the relation of energy accumulation, then at the cumlative energy of inkjet ink chamber ink inside originally just than higher, if still impose the second fixing drive and fixing energy heating be provided, might make the energy of accumulating in the inkjet ink chamber surpass this predetermined energy threshold, cause and originally only should heat and the inkjet ink chamber of predetermined ejection ink also sprays ink, will cause thus to print wrong data.
In order to improve above-mentioned contingent mistake, can in the drive circuit of aforesaid each embodiment, increase by a temperature survey reponse system, the temperature of the present inkjet ink chamber of detection of dynamic, when the temperature of inkjet ink chamber raises, then can appropriateness downgrade the second driving energy that signal provided, take place with the situation of avoiding mistake ink-jet water.
With reference to Figure 13, Figure 13 cooperates the functional block diagram of a temperature survey reponse system 570 for driver of ink-jet head of the present invention.The control of drive circuit 500 controlled unit 510 is heated each inkjet ink chamber 530 with the heater circuit 525 that drives in the ink gun 520,530 of each inkjet ink chamber can spray ink to print according to clock signal, drive circuit 500 can be the drive circuit 100,200,300 or 400 of each embodiment of the invention described above, drive circuit 500 and the print data that can be transmitted according to the control module 510 of printing equipment, and decision drives signal 535 with first or the second driving signal 538 drives each inkjet ink chamber 530 in the ink gun 520.And temperature detection reponse system 570 includes a heat sensor 540, a feedback control unit 550 and a digital/analog converter 560.Heat sensor 540 can be commonly to be used for measuring the thermistor of temperature to be used for detecting the temperature of inkjet ink chamber 530,550 of feedback control units are connected electrically in heat sensor 540, and the temperature that can be detected according to heat sensor 540 is dynamically to determine second to drive the variation situation of signal, and produce second of a numeral and drive the signal reference value, but 560 of digital/analog converters are second to be driven the simulation second that the signal reference value is converted to the reality components of drive circuit and drive signal 538 what feedback control unit 550 produced.Can make dynamic change according to the temperature of inkjet ink chamber 530 because second drives signal 538, when 540 sensed temperature of heat sensor raise, second energy that drives signal and provided can be provided feedback control unit 550, thus, the non-predetermined jet orifice that prints just can not be because of the overheated ink-jet water that misses.
Because each inkjet ink chamber 530 is not control its ink-jet situation by 500 of drive circuits, the situation of its temperature change also is not quite similar, therefore can a corresponding heat sensor 540 be set at each inkjet ink chamber 530, make feedback control unit 550 to adjust second and drive signal 538 at the situation of indivedual inkjet ink chamber 530 temperature changes.Certainly, the technical difficulty that ink gun is made improves, and corresponding cost also can improve.In order to enjoy the advantage of temperature detection and FEEDBACK CONTROL, simultaneously do not wish to increase the difficulty and the cost of manufacturing technology again, can walk around all inkjet ink chamber 530 with single thermistor, mean temperature with all inkjet ink chamber 530 of this thermosensitive resistance measurement, when mean temperature rises, then represent the second driving energy that signal provided to reduce, therefore feedback control unit 550 can will offer second of each inkjet ink chamber 530 and drives signal and all adjust, its energy that provides is diminished, thus, then this kind method of measuring mean temperature can obtain a coordination taking into account between accuracy and manufacturing cost.
The above only is preferred embodiment of the present invention, and all equivalent variations and modifications of being done according to claim scope of the present invention all should belong to the covering scope of claim of the present invention.
Claims (24)
1. one kind is used for driving ink-jet head driving circuit in the printing equipment, this ink gun includes a plurality of inkjet ink chamber and corresponding a plurality of heating element heater, each inkjet ink chamber can ccontaining ink therein and have a jet orifice, this drive circuit can provide energy with to its heating to drive these a plurality of heating element heaters to corresponding inkjet ink chamber according to print data that this printing equipment sent, and ink is printed from this jet orifice ejection, this drive circuit includes:
One drive signal generation circuit can be according to this print data to provide at least two kinds of different corresponding driving signals, and this drive signal generation circuit includes:
One multiplexer includes at least one selected cell and be used to provide this first driving signal, and at least one selected cell is used to provide this second driving signal; Wherein this drive signal generation circuit can provide this first driving signal for the predetermined jet orifice that prints, this first drives signal and can make energy that corresponding heating element heater provides greater than a predetermined power threshold value, and heat this inkjet ink chamber and make this jet orifice ejection ink, when this drive signal generation circuit provides this first driving signal for the predetermined jet orifice that prints, this drive signal generation circuit also can provide this second to drive signal for the non-predetermined jet orifice that prints, this second drives signal and can make energy that corresponding heating element heater provides less than this predetermined power threshold value, therefore only corresponding inkjet ink chamber is heated and can not make its jet orifice ejection ink.
2. drive circuit as claimed in claim 1, wherein this drive circuit also includes:
One shift register, the print data that is used for receiving this printing equipment in proper order and is sent; And
One lock-in circuit is used for locking and storing this print data.
3. drive circuit as claimed in claim 1, wherein each heating element heater is that a heating resistor is arranged on by the corresponding inkjet ink chamber, is used for the ink in this inkjet ink chamber is heated.
4. drive circuit as claimed in claim 1, wherein this printing equipment can be an ink-jet printer, copying machines or facsimile machine.
5. drive circuit as claimed in claim 1, wherein this ink gun also comprises an ink container and is connected in this a plurality of inkjet ink chamber, and the ink in this ink container can be by a plurality of pipelines to be delivered in these a plurality of inkjet ink chamber.
6. drive circuit as claimed in claim 2, wherein this drive signal generation circuit includes:
One start-up circuit can first drive signal or this second and drives signal to this heating element heater to export this, and begin corresponding inkjet ink chamber heating according to an enabling signal.
7. drive circuit as claimed in claim 1, wherein this print data includes a plurality of 1 or 0 data bit, and this multiplexer includes a plurality of selected cells, each selected cell can be 1 or 0 according to the print data that is received, to select providing this first driving signal or this second driving signal as output.
8. drive circuit as claimed in claim 7, wherein this start-up circuit includes a plurality of AND gates to be connected corresponding selected cell in this multiplexer, when an AND gate receives this enabling signal, can export this first driving signal or this second driving signal that corresponding selected cell transmitted to this heating element heater.
9. drive circuit as claimed in claim 7, wherein this start-up circuit includes a plurality of switch elements, to be connected corresponding selected cell in this multiplexer, when a switch element receives this enabling signal, can export this first driving signal or this second driving signal that corresponding selected cell transmitted to this heating element heater.
10. drive circuit as claimed in claim 1, wherein this first driving signal and this second driving signal are all potential pulse, and this first driving voltage of signals is big than this second driving voltage of signals, therefore makes this first driving energy that signal provided big than this second driving energy that signal provided.
11. drive circuit as claimed in claim 1, wherein this first driving signal and this second driving signal are all potential pulse, and the pulse width of this first driving signal is wide than the pulse width of this second driving signal, therefore makes this first driving energy that signal provided big than this second driving energy that signal provided.
12. drive circuit as claim 11, wherein this print data includes a plurality of 1 or 0 data bit, and this drive signal generation circuit includes a plurality of pulse width selected cells, each pulse width selected cell can be 1 or 0 according to the print data that is received, with select to provide energy bigger first drive signal or energy less second drive signal as output.
13. drive circuit as claimed in claim 1, wherein this first drives signal and second drives signal and be all potential pulse with this, and this first drives signal and include a preheat pulse and a heating pulse, and this second driving signal only comprises this preheat pulse.
14. as the drive circuit of claim 13, wherein the energy that this preheat pulse provided is less than this predetermined power threshold value, and the summation energy that this preheat pulse and this heating pulse provided is greater than this predetermined power threshold value.
15. drive circuit as claimed in claim 1, wherein this drive circuit also comprises a temperature detection reponse system, and it includes:
One heat sensor is used for detecting the temperature of these a plurality of inkjet ink chamber;
One feedback control unit is connected electrically in this heat sensor, and can be according to the temperature that is detected to adjust this second driving energy size that signal was provided;
Wherein when temperature that this heat sensor detected raises, this feedback control unit can reduce this and second drive the energy that signal provided, so that the non-predetermined jet orifice that prints can be because of the overheated ink-jet water that misses.
16. as the drive circuit of claim 15, wherein this heat sensor is a thermistor.
17. one kind is used for driving an ink-jet head driving circuit, this ink gun include a plurality of inkjet ink chamber with ccontaining ink in wherein, each inkjet ink chamber also has a jet orifice, this drive circuit can provide energy to these a plurality of inkjet ink chamber respectively, so that ink sprays from this jet orifice, this drive circuit includes:
One drive signal generation circuit can provide one first to drive signal and one second driving signal, and this drive signal generation circuit includes:
One multiplexer includes at least one selected cell and be used to provide this first driving signal, and at least one selected cell is used to provide this second driving signal;
Wherein this drive signal generation circuit can provide this first driving signal for the predetermined jet orifice that prints, and makes this jet orifice ejection ink; When this drive signal generation circuit provides this first driving signal for the predetermined jet orifice that prints, this drive signal generation circuit also can provide this second driving signal for the non-predetermined jet orifice that prints, and corresponding inkjet ink chamber temperature is raise but can not make its jet orifice ejection ink.
18. as the drive circuit of claim 17, wherein this drive circuit also includes:
One shift register, the print data that is used for receiving this printing equipment in proper order and is sent; And
One lock-in circuit is used for locking and storing this print data.
19. as the drive circuit of claim 18, wherein this drive signal generation circuit includes:
One start-up circuit can be according to an enabling signal to export this first driving signal or this second driving signal heater circuit to this ink gun, so that corresponding inkjet ink chamber is heated.
20. drive circuit as claim 17, wherein this first driving signal and this second driving signal are all potential pulse, and this first driving voltage of signals is big than this second driving voltage of signals, therefore makes this first driving energy that signal provided big than this second driving energy that signal provided.
21. drive circuit as claim 17, wherein this first driving signal and this second driving signal are all potential pulse, and the pulse width of this first driving signal is wide than the pulse width of this second driving signal, therefore makes this first driving energy that signal provided big than this second driving energy that signal provided.
22. as the drive circuit of claim 17, wherein this first drives signal and second drives signal and be all potential pulse with this, and this first drives signal and include a preheat pulse and a heating pulse, and this second driving signal only comprises this preheat pulse.
23. as the drive circuit of claim 17, wherein this drive circuit also comprises a temperature detection reponse system, it includes:
One heat sensor is used for detecting the temperature of these a plurality of inkjet ink chamber;
One feedback control unit is connected electrically in this heat sensor, and can be according to the temperature that is detected to adjust this second driving energy size that signal was provided;
Wherein when temperature that this heat sensor detected rises, this feedback control unit can reduce this and second drive the energy that signal provided, so that the non-predetermined jet orifice that prints can be because of the overheated ink-jet water that misses.
24. as the drive circuit of claim 23, wherein this heat sensor is a thermistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001242989A CN1189320C (en) | 2000-08-18 | 2000-08-18 | Driver for ink jet head in printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001242989A CN1189320C (en) | 2000-08-18 | 2000-08-18 | Driver for ink jet head in printer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1338375A CN1338375A (en) | 2002-03-06 |
| CN1189320C true CN1189320C (en) | 2005-02-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001242989A Expired - Fee Related CN1189320C (en) | 2000-08-18 | 2000-08-18 | Driver for ink jet head in printer |
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| Country | Link |
|---|---|
| CN (1) | CN1189320C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6712439B1 (en) * | 2002-12-17 | 2004-03-30 | Lexmark International, Inc. | Integrated circuit and drive scheme for an inkjet printhead |
| US7722144B2 (en) * | 2004-04-19 | 2010-05-25 | Hewlett-Packard Development Company, L.P. | Fluid ejection device |
| CN101190603B (en) * | 2006-11-28 | 2010-05-19 | 研能科技股份有限公司 | Three-dimensional type ink-jet driving circuit and ink-jet driving matrix circuit |
| CN110920253B (en) * | 2018-09-19 | 2021-01-22 | 精工爱普生株式会社 | Print head control circuit, print head, and liquid ejecting apparatus |
-
2000
- 2000-08-18 CN CNB001242989A patent/CN1189320C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1338375A (en) | 2002-03-06 |
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