CN1219641C - Ink jet printer possessing independont driving circuits for warm-up and heat sustentation - Google Patents
Ink jet printer possessing independont driving circuits for warm-up and heat sustentation Download PDFInfo
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- CN1219641C CN1219641C CN 02132271 CN02132271A CN1219641C CN 1219641 C CN1219641 C CN 1219641C CN 02132271 CN02132271 CN 02132271 CN 02132271 A CN02132271 A CN 02132271A CN 1219641 C CN1219641 C CN 1219641C
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Abstract
The present invention provides an ink jet printer which is provided with at least one ink jet unit, a first drive circuit and a second drive circuit, wherein the first drive circuit and the second drive circuit are both electrically connected to the ink jet unit in order to provide energy, wherein when the ink jet unit receives the energy provided by the first drive unit, the second driving unit stops providing the energy for the ink jet unit; when the ink jet unit receives the energy provided by the second drive unit, the first drive unit stops providing the energy for the ink jet unit.
Description
Technical field
The invention provides a kind of ink-jet printer, refer to a kind of ink-jet printer that possesses independent preheating drive circuit especially.
Background technology
In various PRN device, the low price of ink-jet printer and outstanding print quality have made ink-jet printer become one of the most universal computer printout equipment of current utilization.
Please refer to Fig. 1.Fig. 1 is the circuit diagram of a known ink-jet printer 10.Be provided with a plurality of drive circuit 16B that address circuit 16A and that control circuit 12, that ink jet unit A11 to A13, the A21 to A23 of matrix and power circuit 14, that A31 to A33, is used to provide electrical power be used for controlling printer 10 is used for controlling each ink jet unit is used for driving each ink jet unit that are arranged as in the ink-jet printer 10.Control circuit 12 is electrically connected to address circuit 16A and drive circuit 16B, with control address circuit and drive circuit.The structure of each ink jet unit is identical; With ink jet unit A13 is example, is provided with nozzle K, a heating component D and a field-effect transistor (field effecttransistor) T of a correspondence among the ink jet unit A13.The grid of transistor T becomes the control end Tc of ink jet unit A13, in other the two poles of the earth, and source ground, drain electrode is connected to heating component D; And heating component D is not connected to the input that an end of transistor T just becomes ink jet unit A13, is connected to node Ti.Heating component D is located at (not shown) in the ink chamber usually; When heating component D after having imported electrical energy between its two ends, just electrical energy can be changed into heat energy, with the ink in ink chamber heating, after the temperature of ink heating surpassed a specified temp, ink will jetting nozzle K, reached the effect of inkjet printing.
In order to control each ink jet unit, cooperate the ink jet unit that is arranged as triplex row (row), address circuit 16A also is provided with three address wire Aa1 to Aa3, address wire Aa1 is connected to the control end of ink jet unit A11, A12 and A13, address wire Aa2 then is connected to the control end of ink jet unit A21, A22 and A23, by that analogy, as shown in fig. 1.In order to drive each ink jet unit, cooperate the ink jet unit that is arranged as three row (column), drive circuit 16B is provided with three drive wire Pa1 to Pa3 accordingly; Drive wire Pa1 is connected to the input of ink jet unit A11, A21 and A31, and driver element Pa2 is connected to the input of ink jet unit A12, A22 and A32, by that analogy.After controlled circuit 12 controls of address circuit 16A, the electrical power that can utilize power circuit 14 to provide optionally improves (being equivalent to send a high-tension initiating signal) with the voltage of one or more address wire; Similarly, after controlled circuit 12 controls of drive circuit 16B, also the electrical power that power circuit 14 can be provided optionally improves the voltage of one or more drive wire, and electrical energy is transferred out via drive wire.
The control principle of printer 10 inkjet printings can be described as follows.Control circuit 12 can be according to the graph data control address circuit 16A and the drive circuit 16B that will print.For instance, according to print data, ink jet unit A13 must be driven and inkjet printing, and this moment, the voltage of the address wire Aa1 that address circuit 16A can connect ink jet unit A13 improved to form a starting signal, made the transistor turns among the ink jet unit A13; The voltage of the drive wire Pa3 that while drive circuit 16B also can connect ink jet unit A13 raises; The transistor that cooperates conducting among the ink jet unit A13, energy just can transfer among the ink jet unit A13 by drive wire Pa3, by its heating component electrical energy are converted to heat energy and inkjet printing.Relatively, if according to print data, a certain ink jet unit does not need ink-jet, then control module 12 can stop to provide high-tension initiating signal to the address wire that this ink jet unit is connected to, or stop to provide electrical energy to the drive wire that this ink jet unit is connected to, then this ink jet unit just can ink-jet.Utilize above-mentioned control mode, printer 10 just can go out the clearly demarcated figure of light and shade by inkjet printing.
But, ink-jet printer is in the process of inkjet printing, and each ink jet unit has the uneven phenomenon of thermal energy state.When each ink jet unit in the printer is constantly driven and behind the inkjet printing, the heating component of each ink jet unit all can be accumulated certain remaining heat energy repeatedly; The existing institute of the thermal energy state of each heating component is different when just having begun to want inkjet printing with each ink jet unit.If also when driving printing, applying identical energy under the different thermal energy state, then the heating component in each ink jet unit can be heated to ink different temperature, make that the quantity of ink of nozzle ejection is also different, wait to print the ink dot that forms on the file also can be not of uniform size, reduce the quality of printing.In addition, the number of times that is driven ink-jet at the ink jet unit of diverse location also may be different, also can cause between each ink jet unit the heat energy accumulation different.
In order to address the above problem, printer can carry out a preheating program, earlier the heating component in each ink jet unit is heated to certain temperature in advance, carries out follow-up inkjet printing again.So, each ink jet unit when just beginning inkjet printing thermal energy state and drive to print repeatedly after thermal energy state, just can reach unanimity, with the quality of maintaining ink-jet printing.Certainly, according to print data, also can be further the ink jet unit of diverse location be carried out preheating.For instance, according to print data, it is less that a certain ink jet unit is driven the number of times of ink-jet, just can carry out preheating at this ink jet unit, make the more ink jet unit of the thermal energy state of this ink jet unit and other ink-jet number of times close, so that after each driver element accepts unified driving electrical energy by each drive wire, can spray the ink dot of big or small convergence unanimity.
In the printer of known technology, preheating program is undertaken by drive circuit 16B.That is to say, supply the pre-thermal energy of electrical form by drive circuit 16B and give each ink jet unit, make the heating component in each ink jet unit can be heated to certain temperature.In general, pre-thermal energy in the preheating program drives the energy different (the former is less usually) of ink-jet when understanding with normal the printing, in other words, drive circuit 16B wants to transmit the electrical energy (comprising the time length control of the energy and the initiating signal of different voltages or different electric currents) of different sizes.And this can make manufacturing and designing of known drive circuit comparatively complicated, the cost of increase design, producing, safeguard.
Summary of the invention
Therefore, main purpose of the present invention is to provide a kind of printer, and it has to be independent of prints the outer preheating drive circuit of drive circuit, and design that can simplified driving circuit is lowered the cost of drive circuit, and can be kept the quality of printing.
The invention provides a kind of inkjet-printing device, it includes: at least one ink jet unit, and it has the nozzle of an input and a correspondence, and this input is used for received energy; When the energy that is received by this input when this ink jet unit surpassed a predetermined value, this ink jet unit can be by this nozzle ink jet; One first drive circuit is electrically connected to this input, is used to provide energy; And second drive circuit, be electrically connected to this input, be used to provide energy; Wherein when this ink jet unit received the energy that this first drive circuit provides, this second drive circuit can stop to provide energy to this ink jet unit.
The present invention also provides a kind of inkjet-printing device, and it includes: a plurality of ink jet units, and each ink jet unit all has the nozzle of an input and a correspondence, and this input is used for received energy; When the energy that is received by this input when this ink jet unit surpassed a predetermined value, this ink jet unit can be by this nozzle ink jet; One first drive circuit is electrically connected to this input, is used to provide first energy greater than this predetermined value; And one second drive circuit, be electrically connected to this input, be used to provide second energy less than this predetermined value, to compensate heat history effects different between different ink jet units.
The present invention also provides a kind of inkjet-printing device, include a plurality of ink jet units, each ink jet unit all has the nozzle of an input and a correspondence, this input is used to receive one first energy and second energy less than this first energy, when this ink jet unit receives this first energy, this ink jet unit can be by this nozzle ink jet, when this ink jet unit receives this second energy, this ink jet unit can be heated to compensate its heat history effect, it is characterized in that this first energy and this second energy are provided by one first drive circuit and one second drive circuit respectively.
Description of drawings
Fig. 1 is the circuit diagram of a known printer.
Fig. 2 is the circuit diagram of first embodiment of the invention.
Fig. 3 is the circuit diagram of second embodiment of the invention.
The symbol description of icon:
10,20,30: printer 12,22,32: control circuit
14,24: power circuit 16A, 26A: address circuit
16B, 26B: drive circuit 28,38: the second drive circuits
Aa1-Aa3, A1-A3: address wire D1-D3: diode
Pa1-Pa3: drive wire K, Nz: nozzle
D, H: heating component T, Q: transistor
S0-S3: switch Tc, Nc: control end
Ti, Ni, N0, N1: node
Vcc1, Vcc2: voltage
A11-A13、A21-A23、A31-A33、C11-C13、C21-C23、C31-C33：
Ink jet unit
The specific embodiment
Please refer to Fig. 2.Fig. 2 is the circuit diagram of printer one embodiment 20 of the present invention.Be provided with a plurality of ink jet units in the printer 20 and (draw nine among Fig. 2 as representative, be respectively ink jet unit C11 to C31, C21 to C23, and C31 to C33), the control circuit 22, of a power circuit 24 that is used to provide power supply, the control printer job address circuit 26A, that is used for controlling each ink jet unit is used for driving the drive circuit 26B that each ink jet unit is printed, and second drive circuit 28 that is used for each ink jet unit of preheating.Be similar to the ink jet unit in the known printer, the structure of each ink jet unit in the printer 20 is identical; With ink jet unit C13 is example, is provided with field-effect transistor Q, heating component H and nozzle Nz in the ink jet unit.The grid of transistor Q is as the control end Nc of ink jet unit C13, and in the two poles of the earth, source electrode is held with being connected in addition, and drain electrode then is connected to the end of heating component H; The other end of heating component H is connected to node Ni then as the input of ink jet unit C13.Cooperate the ink jet unit that is arranged as triplex row, address circuit 26A also is provided with three address wire A1 to A3, and address wire A1 is connected to the control end of ink jet unit C11, C12 and C13, by that analogy, and as shown in Figure 2.Cooperate the ink jet unit that is arranged as three row, drive circuit 26B also is provided with three drive wire P1 to P3, and drive wire P1 is connected to ink jet unit C11, C21 and C31, by that analogy.
The carrying out of preheating work for convenience is provided with second drive circuit 28 in addition in the printer 20 of the present invention.In the embodiment of Fig. 2, be provided with a switch S 0 in second drive circuit 28, cooperate three drive wires, also be respectively equipped with three diode D1 to D3.The negative electrode of diode D1, D2 and D3 is electrically connected to drive wire P1, P2 and P3 respectively; Anode then is connected to switch S 0 via node N0 jointly.Switch S 0 is controlled its conducting or shutoff by control circuit 22; When switch S 0 conducting, the electrical energy of power circuit 24 supplies just can transfer to node N0, otherwise when switch S 0 was turn-offed, power circuit 24 just no longer was electrically connected with node N0, and energy just can not transfer to node N0 via switch S 0 yet.And the diode D1 to D3 that each drive wire P1 to P3 connects in second drive circuit can prevent from normally to print the time voltage of each drive wire interfere with each other via node N0 short circuit.
The situation of printer 20 work can be described as follows.When printer 20 was wanted each ink jet unit of preheating, control circuit 22 can also can be controlled drive circuit 26B and quit work earlier with switch S 0 conducting simultaneously.In other words, drive circuit 26B can not provide energy to each ink jet unit, but provides the energy of preheating to each driver element by second drive circuit 28 via the switch S 0 of conducting.This moment control circuit 22 operably location circuit 26A control by those ink jet units and carry out preheating.For instance, to carry out preheating to ink jet unit C21, C22 and C23, then address circuit 26A can improve the voltage of address wire A2, make the transistor turns among ink jet unit C21, C22 and the C23, allow these ink jet units can turn-on power circuit 24 transfer to the electric current of drive wire P1, P2 and P3, to receive the pre-thermal energy of electric energy form via node N0.Certainly, address circuit 26A also can cooperate the energy that is transmitted in drive wire P1 to P3 once with all address wire A1 to A3 conductings, and all ink jet units all can obtain the energy of preheating, carry out preheating.
On the other hand, when printer 20 will normally be printed, control circuit 22 will make switch S 0 turn-off not conducting, changes the energy that normal printing ink-jet is provided by drive circuit 26B.According to print data, control circuit 26B just can control the voltage that drive circuit 26B optionally improves a certain (or several) drive wire, cooperates the high-tension address wire of address circuit 26A, to provide normal inkjet printing required energy.For instance, if according to print data, ink jet unit C22 wants ink-jet, the voltage of address wire A2 will be improved by address circuit 26A, allow transistor turns among the ink jet unit C22, and drive circuit 26B also can improve the voltage of drive wire P2, transfers to ink jet unit C22 with the energy that power circuit 24 is provided.Do not need the ink jet unit of ink-jet, the address wire that its control end connects can be maintained at low-voltage, make the not conducting of transistor in the single garden of this ink-jet, or the drive wire that its input is connected is maintained at low-voltage, makes it not transmit energy.And the diode D1 to D3 that each drive wire P1 to P3 connects in second drive circuit can prevent from normally to print the time voltage of each drive wire interfere with each other via node N0 short circuit.
As previously mentioned, the required energy of the required energy of preheating and normal inkjet printing is different.The required energy of inkjet printing is greater than a predetermined value usually, just can order about heating component in the ink jet unit and ink is heated to uniform temperature and is sprayed by nozzle.Relatively, the energy of preheating just can make only temperature rising of ink jet unit less than this predetermined value, but not ink-jet.In the present invention, power circuit just can offer the drive circuit 26B and second drive circuit 28 respectively with different voltage vcc 1 and Vcc2.Voltage vcc 2 can be less than voltage vcc 1, and so reaching the pre-thermal energy of each drive wire via the switch S 0 of conducting when preheating will be less.In addition, also the ON time of controllable switch S0 transfers to the online pre-thermal energy of driving to control second drive circuit 28; The time of switch S 0 conducting is shorter, and pre-thermal energy will be lower.
Please refer to Fig. 3.Fig. 3 is the circuit diagram of another embodiment of the present invention 30.For convenience of description, circuit and assembly identical with label among Fig. 2 among Fig. 3 have identical functions and working method, the address wire A1 to A3, the drive wire P1 to P3 that comprise power circuit 24, address circuit 26A, drive circuit 26B, each ink jet unit and be connected respectively to each ink jet unit.Be similar to the embodiment of Fig. 2, control the work of printer in the printer 30 with control circuit 32, and provide pre-thermal energy with second drive circuit 38.In the present embodiment, cooperate each drive wire to be respectively equipped with a switch S 1 to S3 in second drive circuit 38, each switch is controlled by control circuit 32.When controlled circuit 32 conductings of the switch of a corresponding drive wire, this drive wire just can be electrically connected to power circuit 24 via node N1; When switch turn-offed not conducting, corresponding drive wire also just no longer was electrically connected to node N1.One embodiment is identical in the front, and power circuit 24 can provide the energy of voltage vcc 1 to drive circuit 26B, second drive circuit 38 is provided the energy of voltage vcc 2.
Be similar to the operation of last embodiment, when printer 30 will carry out preheating, control circuit 32 can make drive circuit 26B stop at and respectively drive online transmission energy, and provides preheating required energy by second drive circuit 38.Control circuit 32 is each switch in conducting second drive circuit 38 optionally, adds the driving to address circuit address line, and selecting will to which ink jet unit preheating.For instance, if as long as preheating ink jet unit C32, then as long as control circuit 32 is actuating switch S2, also allow simultaneously address circuit 26A send initiating signal (voltage of address wire A3 is raise) by address wire A3, the transistor among the ink jet unit C32 will conducting and via the pre-thermal energy of the switch S 2 reception voltage vccs 2 of node N1, conducting like this.Via this mode, control circuit 32 just can select specific one or several ink jet units to carry out preheating in the process of preheating, allows the more flexible and adaptability of warm.Which ink jet unit needs control circuit 32 can decide carry out preheating according to print data, for example is that the less ink jet unit of ink-jet number of times is carried out preheating.Certainly, which ink jet unit needs preheating control circuit 32 also can decide according to other principle, or unification is carried out preheating to each ink jet unit.
When printer 30 end preheatings, in the time of will beginning the driven printing, control circuit 32 can all turn-off not conducting with respectively driving online switch S 1 to S3 in second drive circuit 38; Change that to cooperate address circuit 26A to come to supply voltage to the ink jet unit of wanting ink-jet by drive circuit 26B be the energy of Vcc1.The working method that drives ink-jet is described in last embodiment; Do not hindering the technology of the present invention
Situation under, repeat no more in this.And the switch S 1, S2 and the S3 that turn-off can prevent each drive wire P1 to P3
Short circuit is together mistakenly for node N1.
No matter be which above-mentioned embodiment, when reality is implemented technology of the present invention, can after carrying out ink-jet, each ink jet unit of going promptly carry out preheating, in order to follow-up ink-jet to ink jet unit with delegation.For instance, improve the voltage of address wire A1 at address circuit 26A after, control circuit 32 (or 22) can be controlled drive circuit 26B earlier needs optionally to drive ink jet unit C11, C12 or the C13 that is connected to address wire A1 according to printing, even stop to transmit energy with drive circuit 26B after printing, changing by second drive circuit provides pre-thermal energy to the ink jet unit that is connected on the same address wire A1; Certainly, in a second embodiment, control circuit 32 also can be further optionally each switch S 1 of conducting to S3, to select that different ink jet unit C11, C12 or C13 are carried out preheating.Behind the ink jet unit that drives on the intact address wire A1 of ink-jet and preheating, can continue the ink jet unit on the address wire A2 is repeated the program of above-mentioned " driving ink-jet-preheating ", up to address circuit 26A carried out " driving ink-jet-preheating " in regular turn to each bar address wire after, circulation is pulled over ink jet unit to address wire A1 to carry out " drive ink-jet-preheating " of another circulation, by that analogy again.
Except above-mentioned mode, the present invention also can carry out preheating to the online ink jet unit in each address more in regular turn after whole address wires drives ink-jet all in regular turn.That is to say, improve the voltage of address wire A1 earlier, cooperate the ink jet unit ink-jet on the drive circuit 26B driving address wire A1, improve the voltage of address wire A2 more in regular turn, drive the ink jet unit inkjet printing on the address wire A2, after all address wires of address circuit 26A all drive ink-jet, again improve the voltage of address wire A1 again, cooperate the ink jet unit on the second drive circuit preheating address wire A1, improve the voltage of the second address wire A2 more in regular turn, ink jet unit on the preheating address wire A2 is all finished preheating up to the ink jet unit of all address wires.Certainly, after driving each address wire ink jet unit in regular turn and carrying out inkjet printing, also can once just drive all address wires, the pre-thermal energy that cooperates second drive circuit to provide comes that each is driven online ink jet unit and carries out preheating simultaneously.
In known technology, the work that drives ink-jet and preheating all is to be undertaken by drive circuit, can cause the cost of circuit design, manufacturing to increase.By comparison, the present invention is transmitted the energy of preheating in addition by second drive circuit that works alone except the drive circuit that drives ink-jet, makes the function simplification of two drive circuits, can simplify manufacturing and designing of the drive circuit that drives ink-jet on the one hand; Because pre-thermal energy is less, the demand to the high power tolerance level in second drive circuit is also less, makes the cost of second drive circuit also be minimized on the other hand.And second drive circuit that uses among the present invention is easy to reach the realization of the control of different-energy, no matter be different voltages or different electric current, and the control of the time of different activations, only need a simple control circuit to realize.When reality is implemented, as long as supply with the different curtage (just changing Vcc2) of second drive circuit, just can allow second drive circuit that different pre-thermal energy is provided, provide polynary, flexible pre-heat demand in simple mode.In addition, in the technique known, whether preheating is produced according to print data by control circuit a certain ink jet unit; Used second drive circuit to come as a preheating drive circuit independently in the present invention, whether the activation of preheating whether (a certain ink jet unit of preheating), can be realized in more resilient mode by control circuit.
The above only is the preferred embodiments of the present invention, and all equivalences in claim restricted portion of the present invention change and improve, and all should belong to covering scope of the present invention.
Claims (13)
1. inkjet-printing device, it includes:
At least one ink jet unit, it has the nozzle of an input and a correspondence, and this input is used for received energy; When the energy that is received by this input when this ink jet unit surpassed a predetermined value, this ink jet unit can be by this nozzle ink jet;
One first drive circuit is electrically connected to this input, is used to provide energy; And
Second drive circuit is electrically connected to this input, is used to provide energy; Wherein when this ink jet unit received the energy that this first drive circuit provides, this second drive circuit can stop to provide energy to this ink jet unit.
2. inkjet-printing device as claimed in claim 1, wherein when this ink jet unit received the energy that this second drive circuit provides, this first drive circuit can stop to provide energy to this ink jet unit.
3. inkjet-printing device as claimed in claim 1, wherein the energy that provides of this second drive circuit is no more than this predetermined value.
4. inkjet-printing device as claimed in claim 1, wherein the energy that provides of this first drive circuit is no more than this predetermined value.
5. inkjet-printing device as claimed in claim 1, it also includes an address circuit, is connected to this ink jet unit, is used for sending a starting signal; And this ink jet unit also includes a control end, is used for receiving this initiating signal; This ink jet unit when receiving this initiating signal by the input received energy of this ink jet unit.
6. inkjet-printing device as claimed in claim 1 wherein also includes a heating component in this ink jet unit, is connected to this input, is used for the energy that this input receives is converted into heat energy.
7. inkjet-printing device as claimed in claim 1, it also includes a control circuit, is used for controlling this first drive circuit and this second drive circuit; When this first drive circuit provided energy, this control circuit can be controlled this second drive circuit and stop to provide energy; When this two drive circuit provided energy, this control circuit can be controlled this first drive circuit and stop to provide energy.
8. inkjet-printing device, it includes:
A plurality of ink jet units, each ink jet unit all has the nozzle of an input and a correspondence, and this input is used for received energy; When the energy that is received by this input when this ink jet unit surpassed a predetermined value, this ink jet unit can be by this nozzle ink jet;
One first drive circuit is electrically connected to this input, is used to provide first energy greater than this predetermined value; And
One second drive circuit is electrically connected to this input, is used to provide second energy less than this predetermined value, to compensate heat history effects different between different ink jet units.
9. inkjet-printing device as claimed in claim 8, wherein when this ink jet unit received the energy that this first drive circuit provides, this second drive circuit can stop to provide energy to this ink jet unit.
10. inkjet-printing device as claimed in claim 8, wherein when this ink jet unit received the energy that this second drive circuit provides, this first drive circuit can stop to provide energy to this ink jet unit.
11. inkjet-printing device, include a plurality of ink jet units, each ink jet unit all has the nozzle of an input and a correspondence, this input is used to receive one first energy and second energy less than this first energy, when this ink jet unit receives this first energy, this ink jet unit can be by this nozzle ink jet, when this ink jet unit receives this second energy, this ink jet unit can be heated to compensate its heat history effect, it is characterized in that this first energy and this second energy are provided by one first drive circuit and one second drive circuit respectively.
12. inkjet-printing device as claimed in claim 11, wherein when this first drive circuit provided this first energy, this second drive circuit can stop to provide this second energy.
13. inkjet-printing device as claimed in claim 11, wherein when this second drive circuit provided this second energy, this first drive circuit can stop to provide this first energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02132271 CN1219641C (en) | 2002-09-04 | 2002-09-04 | Ink jet printer possessing independont driving circuits for warm-up and heat sustentation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02132271 CN1219641C (en) | 2002-09-04 | 2002-09-04 | Ink jet printer possessing independont driving circuits for warm-up and heat sustentation |
Publications (2)
| Publication Number | Publication Date |
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| CN1480332A CN1480332A (en) | 2004-03-10 |
| CN1219641C true CN1219641C (en) | 2005-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 02132271 Expired - Fee Related CN1219641C (en) | 2002-09-04 | 2002-09-04 | Ink jet printer possessing independont driving circuits for warm-up and heat sustentation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101219597B (en) * | 2007-01-08 | 2010-05-19 | 研能科技股份有限公司 | Ink-jet driving circuit with preheat function |
| CN103587244A (en) * | 2012-08-13 | 2014-02-19 | 研能科技股份有限公司 | An ink jet control circuit |
| CN106965556B (en) * | 2016-01-14 | 2019-04-09 | 研能科技股份有限公司 | Ink-jet controlling circuit |
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