TW201406560A - Inkjet control circuit - Google Patents

Abstract

An inkjet control circuit is disclosed and disposed on a heating chip of an inkjet head structure. The inkjet control circuit comprises a heater and six switch circuits and receives a power signal, a print data signal, a pre-heat data signal, a heat control signal and a pre-heat control signal. When the print data signal and the heat control signal are high-voltage signals, a portion of ink is heated by the heater to generate bubbles, and the portion of ink are further pushed outside a inkjet hole of the heating chip. When the pre-heat control signal and the pre-heat data signal are high-voltage signals, another portion of ink and an inkjet head are pre-heated by the heater, such that the pre-heat temperature of the inkjet head is easy to control and the pre-heat efficiency is raised.

Description

Inkjet control circuit

The present invention relates to an inkjet control circuit, and more particularly to an inkjet control circuit suitable for heating a wafer of an inkjet head.

In recent years, with the popularity of personal computers and the rapid development of the Internet, inkjet printers have become a very popular peripheral device, widely used in homes, personal studios, and even in various industries. The main advantages of inkjet printers are low cost, low noise during operation and excellent print quality, and can be printed on a variety of media, such as general paper, special inkjet printing paper, photo paper and special slides.

There are many factors that affect the print quality of inkjet printers, such as ink composition, paper selection, and inkjet ink supply. However, inkjet is an indispensable component for any inkjet printer. The quality of the ink cartridge is more important than the printing quality of the inkjet printer. In order to pursue more perfect quality, the relevant developers have invested a lot of time and effort in the design of ink storage and ink supply, which can meet the requirements of simple structure, low production cost, high ink storage capacity and high printing quality.

Since the development of the ink jet printing technology, the manner in which the ink jet head is controlled to discharge ink droplets to the ink jet medium can be roughly classified into two types: piezoelectric type and thermal bubble type. Taking a thermal bubble type inkjet head as an example, the principle of operation is to use a heating resistor to heat a portion of the ink to generate bubbles, thereby ejecting the ink onto the inkjet medium.

Please refer to FIG. 1 , which is a schematic diagram of an inkjet driving circuit for controlling the operation of a single heating resistor in a conventional heating wafer. As shown, the inkjet driving circuit 1 includes a heating resistor 11 and a driving transistor. (Driver MOS) 12 and two input terminals D (Print-Data), P (Power) and a common terminal (COM), wherein one end of the heating resistor 11 is connected to the drain of the driving transistor 12 (Drain) The other end is connected to the input terminal P. The common terminal COM and the input terminal D are respectively connected to the source terminal (Source) and the gate terminal (Gate) of the driving transistor 12, and the common terminal COM is connected to the ground terminal, and the printer is connected. When the control system (not shown) wants to perform the inkjet operation, an enable signal (Enable Signal) is transmitted from the input terminal D to control the driving transistor 12 to be turned on, and the input terminal P transmits a printing voltage to the heating resistor. 11. As a result, the temperature of the heating resistor 11 will rise, and the ink will be heated to generate bubbles to spray the ink onto the inkjet medium.

However, in order to cope with the increasing number of inkjet orifices of inkjet inkjets, the conventional inkjet driving circuit is converted from a conventional two-dimensional control to a serial transmission control, which has the advantage of greatly reducing the contact of the inkjet head wafer. The number of dots (Pad), and can speed up the printing speed. Generally, the printing voltage transmitted by the input terminal D is divided into two types: a warming pulse voltage (Warming Pulse) and a heating pulse voltage (Firing Pulse), and the heating resistor 11 of the inkjet driving circuit is mainly controlled by the preheating pulse voltage. Heating, thereby heating a portion of the ink and the inkjet head to a specific temperature, and then heating the heating resistor 11 of the inkjet driving circuit by the heating pulse voltage to heat the partial resistor of the heating resistor 11 to generate bubbles, thereby further ink One of the ink jet holes of the heated wafer is pushed out.

Please refer to FIG. 2 , which is a waveform diagram of the voltages of the conventional input terminals P and D and the voltage Vr across the heating resistor. As shown in the figure, the input terminal D is at a high potential between time ta1 and ta2. Indicates that there is printed information to be printed. At this time, the printer control system performs an ink ejection operation, and transmits a preheating pulse voltage P1 and a heating pulse voltage P2 to the input terminal P, respectively, and the partial ink and the inkjet head are firstly preheated by the preheating pulse voltage P1. Preheating, and then heating the partial ink by the heating pulse voltage P2 to generate bubbles to spray the ink onto the corresponding inkjet medium. Therefore, the preheating pulse voltage P1 and the heating pulse voltage P2 cause the voltage Vr across the heating resistor 11 to generate two high potentials between time ta1 and ta2, respectively; however, between the times ta3 and ta4 due to the input terminal D is low, that is, there is no printing data to be printed, so the second preheating pulse voltage P1 and the second heating pulse voltage P2 transmitted from the terminal P are input, that is, between time tp5 to tp6 and tp7 to tp8. Part of the ink and the ink jet head are not preheated, so that the voltage Vr across the heating resistor 11 is maintained at a low level between time ta3 and ta4.

It is well known that a single ink-jet head has a plurality of ink-jet holes and an ink-jet driving circuit. The prior art only preheats part of the ink and the ink-jet head in an ink-jet driving circuit that prints the column data. Therefore, if there is not much information printed, the number of ink jet driving circuits that are relatively warmed up is small, and since the temperature of the ink jet head is integral rather than only for one single ink jet hole, only a few ink jet holes are used. The heat that is preheated is quickly taken away by the entire heated wafer, which will cause the preheating temperature of the inkjet head to be insufficient, thereby affecting the print quality.

Therefore, how to develop an inkjet control circuit that can improve the above-mentioned conventional technology is an urgent problem to be solved.

The main purpose of the present invention is to provide an inkjet control circuit which, when the printing data signal and the heating control signal are high-potential signals, causes the heater to heat part of the ink and generate bubbles, thereby pushing the ink out of the heating. The ink ejection hole of the wafer; when the printing data signal is a low potential signal and the preheating control signal and the preheating data signal are high potential signals, the control heater preheats part of the ink and the inkjet head to make it The preheating temperature of the inkjet head is easy to control and the preheating efficiency is improved. The conventional technique only preheats a part of the ink and the inkjet head in the inkjet driving circuit for printing the column data, thereby causing the inkjet head. The preheating temperature is insufficient, which in turn affects the printing quality and other disadvantages.

Another object of the present invention is to provide an inkjet control circuit. At the same time, only the heater controlled by the preheating data signal An-1 is preheated, thereby avoiding the problem of excessive power consumption and overheating of the wafer; When the time is printed, it will be preheated at the time of An-1, that is, preheating is performed before the An time is printed, and the inkjet effect before the inkjet is reached. Therefore, even when the printing is not performed, the preheating control signal and the preheating data signal can be surely preheated, thereby achieving the effect of maintaining the temperature of the wafer, thereby ensuring the printing quality, and the efficiency of the inkjet head preheating temperature control can be improved. Achieve the effect of increasing the printing speed.

Another object of the present invention is to provide an ink jet control circuit that can reduce power and promote efficiency by using various control signals of the printer control system to be a small voltage signal of about 3.3 volts. At the same time, since the driving transistor transmits the power signal to the heater control terminal through the second switching circuit, and then uses the power signal to control the driving transistor to be turned on, the control signal of the smaller voltage can also be used for control, thereby making the control method more For effective and convenient.

In order to achieve the above object, a preferred embodiment of the present invention provides an inkjet control circuit suitable for heating a wafer in an inkjet head, which receives a power signal, a printed data signal, a preheated data signal, a preheating control signal, a reverse warming control signal, a heating control signal, a reverse heating control signal and connected to a common terminal for preheating a portion of the ink and the inkjet head, or Heating a portion of the ink and generating a bubble, thereby pushing the ink out of one of the inkjet holes of the heating wafer, comprising: a heater receiving the power signal and connecting to the common terminal; a switching circuit that receives the power signal and is connected to the heater; a second switching circuit that receives the power signal and is connected to the heater and the first switching circuit; and a third switching circuit that receives The heating control signal and the printed data signal are connected to the common terminal, the first switching circuit and the second switching circuit; a fourth switching circuit receives the warm-up control signal and Warming up the data signal and connecting with the common terminal, the first switch circuit, the second switch circuit and the third switch circuit; a fifth switch circuit receiving the reverse heating control signal and the And printing a material signal, and is connected to the common terminal, the first switch circuit, the second switch circuit and the heater; and a sixth switch circuit receiving the reverse warm-up control signal and the Warming up the data signal and connecting with the common terminal, the first switch circuit, the second switch circuit, the fifth switch circuit and the heater; wherein, the preheating control signal and the preheating data When the signal is a high potential signal, the second switch circuit and the fourth switch circuit are turned on, and the power signal is transmitted to the heater by the second switch circuit, so that the heater is in part to the ink and the ink head Preheating; when the printing data signal and the heating control signal are high potential signals, the second switching circuit and the third switching circuit are turned on, and the power signal is transmitted to the heater by the second switching circuit Make this Heat on the part of the ink is heated and bubbles are generated, thereby pushing the ink out of the ink ejection orifice of the heated wafer.

Some exemplary embodiments embodying the features and advantages of the present invention are described in detail in the following description. It is to be understood that the present invention is capable of various modifications in the various aspects of the present invention, and the description and illustration are in the nature of

In general, the heating wafer disposed inside the ink jet head structure has a plurality of ink ejection holes arranged on the heating wafer, and each of the ink ejection holes has an ink ejection control circuit for controlling the ink ejection. Whether the hole is ink-jetted or not, since the ink-jet head has a plurality of ink-jet holes to be controlled, a plurality of ink-jet control circuits are required to heat the wafer. Hereinafter, a single ink-jet control circuit will be described as an example, but This is limited.

Please refer to FIG. 3, which is a schematic structural diagram of an inkjet control circuit according to a preferred embodiment of the present invention. As shown in the figure, the inkjet control circuit 3 of the present invention is mainly applied to a heating chip (not shown) of an inkjet head, and Receiving power signal, printing data signal PD, preheating data signal PFD, preheating control signal PF, reverse warming control signal PF-N, heating control signal MF, reverse heating control signal MF-N and common terminal The point COM is connected to preheat a portion of the ink and the ink jet head, or to heat a portion of the ink and generate bubbles, thereby pushing the ink out of one of the ink jet holes of the heating wafer.

The preheating control signal PF and the reverse warming control signal PF-N are in an inverse relationship with each other, and the heating control signal MF and the reverse heating control signal MF-N are in an inverse relationship with each other. In some embodiments, the preheat control signal PF and the heating control signal MF may be inverted into a reverse warm-up control signal PF-N and a reverse heating control signal MF by two inverters (not shown), respectively. -N.

The inkjet control circuit 3 of the present invention is mainly composed of a first switch circuit 31, a second switch circuit 32, a third switch circuit 33, a fourth switch circuit 34, a fifth switch circuit 35, a sixth switch circuit 36 and a heater 37. Wherein the heater 37 can include a heating resistor 371 and a drive transistor 372, and has a heater control terminal H that controls whether the heater 37 is heated or warmed up primarily by heating the control terminal H, when the heater controls the endpoint When H is at a high potential, the control drive transistor 372 is turned on, and the heating resistor 371 receives the power signal of the power supply terminal P for heating or warming up.

The second switch circuit 32 can be connected between the power supply terminal P and the heating control terminal H, which is composed of the second switching element M2, and can be an MOS transistor or a BJT transistor, but not limited thereto. The plurality of switching elements are composed in parallel, and have a second switching circuit control terminal H2, and the second switching circuit 32 is controlled to be turned on mainly by the second switching circuit control terminal H2, and the second switching circuit controls the terminal end H2 to be low. When the second switching circuit 32 is turned on, the power signal of the power terminal P is conducted to the heating control terminal H.

The second switching element M2 has a gate, a drain and a source, the source receives a power signal, the drain is connected to the heater control terminal H, and the gate is connected to the second switching circuit control terminal H2.

The first switch circuit 31 can be connected between the power supply terminal P and a second switch circuit control terminal H2, which is composed of the first switching element M1, and can be an MOS transistor or a BJT transistor, but not Alternatively, a plurality of switching elements may be connected in parallel, and have a first switching circuit control terminal H1 connected to the heater control terminal H, and the first switching circuit 31 is controlled to be turned on mainly by the first switching circuit control terminal H1. When the first switching circuit controls the terminal H1 to be low, the first switching circuit 31 is turned on, and the power signal of the power terminal P is conducted to the second switching circuit control terminal H2.

The first switching element M1 has a gate, a drain and a source, the source of the first switching element M1 receives a power signal, the drain of the first switching element M1 is connected to the gate of the second switching element, and the first switching element M1 The gate is connected to the heater control terminal H.

The third switch circuit 33 is connectable between the second switch circuit control terminal H2 and the common terminal COM, which is composed of the third switch element M3 and the fourth switch element M4 in series and receives the heating control signal MF and the column respectively. The printed data signal PD can control whether the third switching circuit 33 is turned on by the printing data signal PD and the heating control signal MF. When the print data signal PD and the heating control signal MF are at a high potential, the third switch circuit 33 is turned on.

The third switching element M3 and the fourth switching element M4 have a gate, a drain and a source, and the gate of the third switching element M3 receives the heating control signal MF, and controls whether the third switching element M3 is turned on by the heating control signal MF. The gate of the fourth switching element M4 receives the printed data signal PD, and controls whether the fourth switching element M4 is turned on by the printing data signal PD, and the drain of the third switching element M3 is connected to the drain of the first switching element M1. The source of the third switching element M3 is connected to the drain of the fourth switching element M4, and the source of the fourth switching element M4 is connected to the common terminal COM.

The fourth switch circuit 34 is also connected between the second switch circuit control terminal H2 and the common terminal COM, which is composed of a fifth switch element M5 and a sixth switch element M6 connected in series and respectively receives the preheat control signal PF and The preheating data signal PFD mainly controls whether the fourth switching circuit 34 is turned on by the preheating control signal PF and the preheating data signal PFD. When the preheating data signal PFD and the warm-up control signal PF are at a high potential, the fourth switching circuit 34 is turned on.

The fifth switching element M5 and the sixth switching element M6 have a gate, a drain and a source, and the gate of the fifth switching element M5 receives the warm-up control signal PF, and the fifth switching element M5 is controlled by the warm-up control signal PF Is it turned on, the gate of the sixth switching element M6 receives the preheating data signal PFD, and the sixth switching element M6 is controlled to be turned on by the preheating data signal PFD, and the drain of the fifth switching element M5 is connected to the first switching element M1. The drain of the fifth switching element M5 is connected to the drain of the sixth switching element M6, and the source of the sixth switching element M6 is connected to the common terminal COM.

The fifth switch circuit 35 is connected between the heater control terminal H and the common terminal COM, which is composed of the seventh switching element M7 and the eighth switching element M8 in series and respectively receives the reverse heating control signal MF-N The printed data signal PD controls whether the fifth switching circuit 35 is turned on mainly by the reverse heating control signal MF-N and the printed data signal PD. When the reverse heating control signal MF-N and the print data signal PD are at a high potential, the fifth switching circuit 35 is turned on.

The seventh switching element M7 and the eighth switching element M8 have a gate, a drain and a source, and the gate of the seventh switching element M7 receives the reverse heating control signal MF-N, which is controlled by a reverse heating control signal MF-N Whether the seventh switching element M7 is turned on, the gate of the eighth switching element M8 receives the printed material signal PD, and the eighth switching element M8 is controlled to be turned on by the printing material signal PD, and the drain of the seventh switching element M7 is connected to the first The drain of the second switching element M2, the source of the seventh switching element M7 is connected to the drain of the eighth switching element M8, and the source of the eighth switching element M8 is connected to the common terminal COM.

The sixth switch circuit 36 is also connected between the heater control terminal H and the common terminal COM, which is composed of the ninth switching element M9 and the tenth switching element M10 in series and respectively receives the reverse warm-up control signal PF- N and the preheating data signal PFD mainly control whether the sixth switching circuit 34 is turned on by the reverse warming control signal PF-N and the preheating data signal PFD. When the warm-up data signal PFD and the reverse warm-up control signal PF-N are at a high potential, the sixth switching circuit 36 is turned on.

The ninth switching element M9 and the tenth switching element M10 have a gate, a drain and a source, and the gate of the ninth switching element M9 receives the reverse warm-up control signal PF-N, by the reverse warm-up control signal PF- N controls whether the ninth switching element M9 is turned on, the gate of the tenth switching element M10 receives the preheating data signal PFD, and controls whether the tenth switching element M10 is turned on by the preheating data signal PFD, and the ninth switching element M9 is connected to the drain The drain of the second switching element M2 is connected to the drain of the tenth switching element M10, and the source of the tenth switching element M10 is connected to the common terminal COM.

Of course, the third to tenth switching elements M3 to M10 may be MOS transistors or BJT transistors, but not limited thereto, any electronic components that can achieve the same purpose and function are protected by the present invention.

When the printer control system (not shown) is to perform an ink ejection operation, the heater 37 is controlled by transmitting a power signal, a print data signal, a heating control signal, and a warm-up control signal to the ink-jet control circuit 3. Heat or preheat. Please refer to FIG. 4 and FIG. 5 , which are respectively a schematic structural view of an inkjet control circuit according to another preferred embodiment of the present invention, and a heating control signal, a preheating control signal, a preheating data signal, and a column shown in FIG. 4 . The signal signal of the printed data signal and the printed data. As shown in Figures 4 and 5, the printed data signal in this case can be the printed data signal DiAn, and the preheated data signal can be the preheated data signal An-1, so that the signal An can be matched with different printed materials. Data1, Data2, Data3, ..., Data15, etc. generate a print data signal DiAn and a warm-up data signal An-1 through an AND circuit, for example, print data generated by the print data Data1 and the signal A1 via an AND circuit (not shown) The signal D1A1, the printed data Data3 and the signal A2 are printed by the AND circuit (not shown), and the like, but not limited thereto. In some embodiments, if the heating of the heater 37 is controlled by the printing data signal DiAn and the heating control signal MF, the warming up of the heater 37 is controlled by the warm-up control signal PF and the preheating data signal An-1.

In other words, when the print data signal DiAn is a high potential signal, the voltage signal level of the heater control terminal H is controlled by the heating control signal MF to control the heating of the heater 37; otherwise, when the preheating data signal An-1 is high At the potential signal, the voltage signal of the heater control terminal H is controlled by the preheat control signal PF to control the heater 37 to warm up. That is, when the printer control system performs the ink ejection operation, if the printing data, that is, the printing data signal DiAn and the heating control signal MF are high, the printer control system causes the heater to be heated by the heating control signal MF. 37 part of the ink is heated and generates bubbles, and then the ink is pushed out of the ink-jet hole of the heating chip; if the data is not printed, the printing data signal DiAn is low, and the preheating data signal An-1 and the preheating The control signal PF is at a high potential, so the printer control system controls the heater 37 to preheat some of the ink and the ink jet head by preheating the data signal An-1.

After the inkjet printing is completed, when the heating control signal MF is a low potential signal, the first switching circuit 31 and the fifth switching circuit 35 will be turned on, while the other switching circuits are not turned on, and the fifth switching circuit 35 can be used. The heater control terminal H potential pulls down to a low potential, so that the heater 37 stops heating; and when the print data signal DiAn is a low potential signal and the warm-up control signal PF is a high potential signal, the second switch circuit 32 and the The four switch circuit 34 will also be turned on, and the other switch circuits will not be turned on. The power signal can be transmitted to the heater 37 by the second switch circuit 32, so that the heater 37 preheats part of the ink and the head.

After the warm-up is completed, when the warm-up control signal PF is a low-potential signal, the first switch circuit 31 and the sixth switch circuit 36 are turned on, the other switch circuits are not turned on, and the heater is controlled by the sixth group switch circuit 36. The potential of the terminal H is pulled down to a low potential to stop the heater 37 from warming up.

According to the concept of the present case, the control signals of the printer control system, that is, the printing data signal DiAn, the preheating data signal An-1, the heating control signal MF and the preheating control signal PF, the voltage magnitudes will vary according to the printer model. There are differences, in some embodiments, about 3.3 volts to achieve power savings and efficiency. Similarly, the driving transistor 372 of the present case transmits the power signal to the heater control terminal H through the second switching circuit 32, and then controls the driving transistor 372 to be turned on by using the power signal, so the present invention can use the control of the smaller voltage. The signal controls the driving transistor 372, which makes the control method more efficient and convenient.

In summary, the inkjet control circuit of the present invention is disposed on a heating wafer inside the inkjet head structure for heating a portion of the ink and generating bubbles, thereby pushing the ink out of the inkjet hole of the heating wafer, at the same time. Only the heater controlled by the preheating data signal An-1 will be preheated, so there is no problem of excessive power consumption and overheating of the wafer; and when printing at An time, it will be preheated at An-1 time. And achieve the preheating effect before inkjet. Even when it is not printed, it can be surely preheated to achieve the effect of maintaining the temperature of the wafer, thereby ensuring print quality, and the efficiency of the inkjet head preheating temperature control can also increase the printing speed.

This case has been modified by people who are familiar with the technology, but it is not intended to be protected by the scope of the patent application.

1. . . Inkjet drive circuit

11. . . Heating resistor

12. . . Drive transistor

Vr. . . Heating the voltage across the resistor

D, P. . . Input endpoint

COM. . . Common endpoint

P1. . . Preheating pulse voltage

P2. . . Heating pulse voltage

3. . . Inkjet control circuit

31. . . First switching circuit

32. . . Second switching circuit

33. . . Third switching circuit

34. . . Fourth switching circuit

35. . . Fifth switch circuit

36. . . Sixth switch circuit

37. . . Heater

371. . . Heating resistor

372. . . Drive transistor

M1. . . First switching element

M2. . . Second switching element

M3. . . Third switching element

M4. . . Fourth switching element

M5. . . Fifth switching element

M6. . . Sixth switching element

M7. . . Seventh switching element

M8. . . Eighth switching element

M9. . . Ninth switching element

M10. . . Tenth switching element

P. . . Power endpoint

PD, DiAn. . . Print data signal

MF. . . Heating control signal

PF. . . Preheat control signal

H1. . . First switching circuit control endpoint

H. . . Heater control endpoint

PFD, An-1. . . Preheating data signal

H2. . . Second switching circuit control terminal

PF-N. . . Reverse warm-up control signal

MF-N. . . Reverse heating control signal

Data1~Data15. . . Print data

An. . . signal

Figure 1 is a schematic diagram of an ink jet drive circuit for controlling the operation of a single heating resistor in a conventional heating wafer.

Figure 2 is a waveform diagram of the voltages of the conventional input terminals P, D and the voltage across the heating resistor Vr.

Figure 3 is a schematic view showing the structure of an ink jet control circuit of the preferred embodiment of the present invention.

Figure 4 is a schematic view showing the structure of an ink jet control circuit of another preferred embodiment of the present invention.

Figure 5 is a voltage signal waveform diagram of the heating control signal, the preheating control signal, the preheating data signal, the printing data signal, and the printing data shown in Fig. 4.

P. . . Power endpoint

COM. . . Common endpoint

PD. . . Print data signal

H1. . . First switching circuit control endpoint

MF. . . Heating control signal

PF. . . Preheat control signal

PFD. . . Preheating data signal

MF-N. . . Reverse heating control signal

PF-N. . . Reverse warm-up control signal

H2. . . Second switching circuit control terminal

3. . . Inkjet control circuit

31. . . First switching circuit

32. . . Second switching circuit

33. . . Third switching circuit

34. . . Fourth switching circuit

35. . . Fifth switch circuit

36. . . Sixth switch circuit

37. . . Heater

371. . . Heating resistor

372. . . Drive transistor

M1. . . First switching element

M2. . . Second switching element

M3. . . Third switching element

M4. . . Fourth switching element

M5. . . Fifth switching element

M6. . . Sixth switching element

M7. . . Seventh switching element

M8. . . Eighth switching element

M9. . . Ninth switching element

M10. . . Tenth switching element

H. . . Heater control endpoint

Claims (9)

An inkjet control circuit is suitable for heating a wafer by one of the inkjet heads, which receives a power signal, a printed data signal, a preheating data signal, a preheating control signal, a reverse warming control signal, and a Heating a control signal, a reverse heating control signal and connecting to a common terminal for preheating a portion of the ink and the inkjet head, or heating a portion of the ink to generate a bubble, thereby pushing the ink out of the Heating one of the inkjet holes of the wafer, the system comprising:
a heater that receives the power signal and is connected to the common terminal;
a first switching circuit that receives the power signal and is connected to the heater;
a second switching circuit that receives the power signal and is connected to the heater and the first switching circuit;
a third switching circuit that receives the heating control signal and the printed data signal, and is connected to the common terminal, the first switching circuit and the second switching circuit;
a fourth switching circuit that receives the preheating control signal and the preheating data signal, and is connected to the common terminal, the first switching circuit, the second switching circuit, and the third switching circuit;
a fifth switching circuit that receives the reverse heating control signal and the column printing signal, and is connected to the common terminal, the first switching circuit, the second switching circuit, and the heater; a sixth switching circuit that receives the reverse warm-up control signal and the preheating data signal, and the common terminal, the first switching circuit, the second switching circuit, the fifth switching circuit, and the heating Connected to each other;
When the warm-up control signal and the warm-up data signal are high-potential signals, the second switch circuit and the fourth switch circuit are turned on, and the power signal is transmitted to the heater by the second switch circuit. , the heater is preheated to a portion of the ink and the inkjet head;
When the printing data signal and the heating control signal are high potential signals, the second switching circuit and the third switching circuit are turned on, and the second switching circuit transmits the power signal to the heater, so that the The heater heats a portion of the ink and creates bubbles that push the ink out of the ink jet orifice of the heated wafer. The inkjet control circuit of claim 1, wherein the heater comprises a heating resistor and a driving transistor. The inkjet control circuit of claim 1, wherein the heater has a heater control terminal, and the first switch circuit, the second switch circuit, the fifth switch circuit, and the sixth switch A circuit is connected to control whether the heater is heated or warmed up by the heating control terminal. The inkjet control circuit of claim 3, wherein the first switching circuit comprises a first switching element, the first switching element has a gate, a drain and a source, the source Receiving the power signal, the drain is connected to the second switch circuit, the gate is connected to the heater control end point, and the first switch element is controlled to be turned on by the gate. The ink-jet control circuit of claim 4, wherein the second switching circuit comprises a second switching element, the second switching element has a gate, a drain and a source, the source Receiving the power signal, the drain is connected to the heater control terminal, the gate is connected to the drain of the first switching element, and the gate is controlled by the gate to control whether the second switching element is turned on. The ink-jet control circuit of claim 4, wherein the third switching circuit comprises a third switching element and a fourth switching element connected in series, and one of the third switching elements receives the heating a control signal, wherein the third switching element is controlled to be turned on by the heating control signal, and one of the gates of the fourth switching element receives the printed data signal, and the printed data signal controls whether the fourth switching element is turned on, One of the third switching elements is connected to the drain of the first switching element, and one source of the third switching element is connected to one of the drains of the fourth switching element, and one source of the fourth switching element The pole is connected to the common terminal. The inkjet control circuit of claim 4, wherein the fourth switching circuit comprises a fifth switching element and a sixth switching element connected in series, and one of the fifth switching elements receives the preheating And controlling, by the preheating control signal, whether the fifth switching element is turned on, and one of the sixth switching elements receives the preheating data signal, and the preheating data signal controls whether the sixth switching element is turned on. One of the fifth switching elements is connected to the drain of the first switching element, and one of the fifth switching elements is connected to one of the drains of the sixth switching element, and one of the sixth switching elements The source is connected to the common terminal. The inkjet control circuit of claim 5, wherein the fifth switching circuit comprises a seventh switching element and an eighth switching element connected in series, and one of the seventh switching elements receives the reverse Heating a control signal, controlling whether the seventh switching element is turned on by the reverse heating control signal, a gate of the eighth switching element receiving the column printing signal, and controlling the eighth switching element by the column printing signal Is conductive, one of the seventh switching elements is connected to the drain of the second switching element, and one of the seventh switching elements is connected to one of the eighth switching elements, the eighth switching element One source is connected to the common terminal. The inkjet control circuit of claim 5, wherein the sixth switching circuit comprises a ninth switching element and a tenth switching element connected in series, and one of the ninth switching elements receives the reverse a preheating control signal, wherein the ninth switching element is controlled to be turned on by the reverse warming control signal, and one of the tenth switching elements receives the preheating data signal, and the tenth is controlled by the preheating data signal Whether the switching element is turned on, one of the ninth switching elements is connected to the drain of the second switching element, and one of the ninth switching elements is connected to one of the tenth switching elements, the tenth One of the switching elements is connected to the common terminal.