TW201725126A - Inkjet control circuit - Google Patents

Abstract

An inkjet control circuit is disclosed and is for receiving a power signal, a turn-on control signal, a reverse turn-on control signal which is opposite to the turn-on control signal, and the inkjet control circuit connects to a common ground point. The inkjet control circuit comprises a controlled driving unit, a first switch, a second switch, a third switch which receives the turn-on control signal, and a fourth switch which receives the reverse turn-on control signal. When the turn-on control signal complies with a high-voltage signal, the third switch is turned on and drives the second switch to turn on, and the controlled driving unit is operated. When the turn-on control signal complies with a low-voltage signal, and the reverse turn-on control signal complies with a high-voltage signal, the fourth switch is turned on and drives the first switch to turn on, thereby the controlled driving unit does not be operated.

Description

Inkjet control circuit

This case relates to a control circuit, especially an inkjet control circuit.

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.

In general, the inkjet printer has an inkjet wafer, wherein the inkjet wafer is mainly composed of a high-potential circuit, and with the continuous innovation of the inkjet wafer fabrication technology in the inkjet printer, the conventional inkjet is overcome. There can only be a problem of high-potential circuits in the ink wafer, so that the current ink-jet wafer can have both a high-potential circuit and a low-potential circuit. The high-potential circuit is mainly used as a switch of the controlled driving unit in the wafer, and is low. The potential circuit is primarily used as a mode of operation for the controlled drive unit within the wafer.

However, conventional inkjet wafers require a more complicated circuit design method to integrate a high-potential circuit and a low-potential circuit, resulting in a wider circuit layout area, thereby increasing the cost of the wafer. Therefore, how to develop a low-complexity and low-cost inkjet control circuit is an urgent problem to be solved.

The purpose of the present invention is to provide an ink jet control circuit that does not require integration of a high potential circuit and a low potential circuit by a complicated circuit design, thereby reducing the circuit layout area and reducing the cost of the wafer.

In order to achieve the foregoing objective, a preferred embodiment of the present invention provides an inkjet control circuit that receives a power supply signal, a conduction control signal, and a reverse conduction control signal that is opposite to the conduction control signal. Connected to the terminal, comprising: a controlled driving unit, receiving the power signal and connected to a ground, and connected to the common terminal, and having a first control terminal to control whether the controlled driving unit is Operating a first switch, receiving the power signal, and having a control terminal for connection with a first control terminal of the controlled drive unit; a second switch for receiving the power signal, and the controlled drive The first control terminal of the unit is connected and has a control end and is connected with the first switch to form a second control end point; a third switch receives the conduction control signal and is connected to a common terminal Connecting, and connecting to the second control terminal connected to the first switch and the second switch; and a fourth switch receiving the reverse conduction control signal and cooperating with a common terminal Connecting, and connecting to the first control terminal of the controlled driving unit; thereby, when the conduction control signal is a high potential signal, the third switch is turned on, causing the second switch to be turned on, the controlled driving unit The first control terminal is controlled to operate at a high potential. If the conduction control signal is a low potential signal, the reverse conduction control signal is a high potential signal, causing the fourth switch to be turned on, and the first switch is turned on. The first control endpoint of the controlled drive unit is low and the control is not operational.

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 drawings are intended to be illustrative and not limiting.

Please refer to FIG. 1 , 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 embodiment provides an inkjet control circuit that receives a power signal P, a conduction control signal A, and a reverse The conduction control /A signal is connected to a common terminal COM, wherein the conduction control signal A and the reverse conduction control signal /A are in an inverse relationship with each other.

The inkjet control circuit 1 of the present invention is mainly composed of a controlled driving unit 11, a first switch M1, a second switch M2, a third switch M3, and a fourth switch M4.

The controlled driving unit receives a power signal P and is connected to a ground, and has a first control terminal W1 to control whether the controlled driving unit 11 operates, when the first control terminal W1 of the controlled driving unit 11 is high. At the potential, the controlled drive unit 11 will be caused to operate, and when the first control terminal W1 of the controlled drive unit 11 is at a low potential, the controlled drive unit 11 will be rendered inoperative.

The first switch M1 receives the power signal P and has a control terminal for connecting to the first control terminal W1 of the controlled driving unit 11. The first switch M1 can be a MOS transistor or a BJT transistor. However, it is not limited thereto, and is mainly controlled by the control terminal of the first switch M1. When the control terminal of the first switch is low, the first switch M1 is turned on.

The first switch M1 has a gate, a drain and a source, the source receives the power signal P, the drain is connected to the second switch M2, and the gate is connected to the control terminal to control the Whether the first switch M1 is turned on.

The second switch M2 receives the power signal P and is connected to the control terminal W of the controlled driving unit 11 and the first switch M1. The second switch M2 can be a MOS transistor or a BJT transistor, but not The control terminal is connected to the first terminal M1 to form a second control terminal W2, and is mainly controlled by the control terminal of the second switch M2, when the second switch is used. When the control terminal of M2 is at a low potential, the second switch M2 is turned on, and the power signal P is conducted to the first control terminal W1 of the controlled driving unit 11.

The second switch M2 has a gate, a drain and a source. The source receives the power signal P, and the drain is connected to the control terminal W of the controlled driving unit 11, and the gate is connected. At the control end, the drain of the first switch M1 is connected to the second control terminal W2, and the gate is controlled by the gate to control whether the second switch M2 is turned on.

The third switch M3 has a control terminal, receives the conduction control signal A, and is connected to a common terminal COM, a first switch M1 and a second switch M2, and the third switch M3 can be a MOS transistor or a BJT The crystal, but not limited thereto, mainly controls whether the third switch M3 is turned on by the conduction control signal A. When the conduction control signal A is at a high potential, the third switch M3 is turned on.

The third switch M3 has a gate, a drain and a source. The gate of the third switch M3 receives the conduction control signal A, and the conduction control signal A controls whether the third switch M3 is turned on. One of the third switches M3 is connected to the second control terminal W2, and is connected to the drain of the first switch M1 and the gate (control terminal) of the second switch M2. The source of the third switch M3 The pole is connected to the common terminal COM.

And a fourth switch M4 having a control terminal for receiving the reverse conduction control signal /A and connected to a common terminal COM, the first control terminal W1 of the controlled driving unit 11 (ie, the first The switch M1 and the second switch M2 are connected, and the fourth switch M4 can be a MOS transistor or a BJT transistor, but not limited thereto, and is mainly controlled by the reverse conduction control signal /A, when reversed When the conduction control signal /A is at a high potential, the fourth switch M4 is turned on.

It can be seen from the above description that, in a specific implementation, when the conduction control signal A is a high potential signal, the third switch M3 is turned on, and causes the control terminal of the second switch M2 connected to the second control terminal W2 to be pulled down to a low potential. The second switch M2 is turned on, and the first switch M1 and the fourth switch M4 are not turned on. At this time, by the conduction of the second switch M2, the first control terminal W1 of the controlled driving unit 11 receives the power signal P, so that The first control terminal W1 of the controlled drive unit 11 is at a high potential to control operation. When the conduction control signal A is a low potential signal (that is, the third switch M3 is not turned on), the reverse conduction control signal /A is a high potential signal, and the fourth switch M4 is turned on, and causes the control unit 11 to be turned on. The control terminal of the first switch M1 connected to the control terminal W2 is pulled down to a low potential, so that the first switch M1 is turned on, and the second switch M2 and the third switch M3 are not turned on, and the fourth switch M4 is turned on. The potential of the first control terminal W1 of the controlled drive unit 11 is pulled down to a low level and the control does not operate.

In some embodiments, the power signal P of the present invention is a high potential signal, which may be, but not limited to, 12 volts or more, and the conduction control signal A is a low potential signal, which may be, but not limited to, 0 volts, 1.8 volts, 3.3 volts, or 5 volts, in this case, the control signal of the smaller potential can be used to control the controlled driving unit 11, thereby making the control mode more efficient and convenient, and directly controlling the controlled driving unit 11 through the control signal of the smaller potential to avoid the extra design. The drive circuit or an additional drive signal source is used to drive the controlled drive unit 11, which can reduce the circuit layout area and reduce the cost of the wafer.

In some embodiments, the inkjet control circuit of the present invention can be, but is not limited to, applied to the heating of the ink and the inkjet head. FIG. 2 is a schematic structural view of the heating type controlled driving unit. As shown in FIGS. 1 and 2, in the case of heating the ink and the ink jet head, the controlled driving unit 11 of FIG. 1 is the heating type controlled driving unit 2 of FIG. 2, and the heating type controlled driving is performed. The power signal P of the unit 2 is a power signal P1, and the heating type controlled driving unit 2 further includes a heating resistor 21 and a driving transistor 22, which may be, but not limited to, a MOS transistor or a BJT transistor. .

When the first control terminal W1 of the controlled driving unit 2 is at a high potential, the driving transistor 22 is turned on, and the power signal P1 flows through the heating resistor 21 to generate thermal energy, and the thermal energy is used to ink and ink. The head is heated, and when the first control terminal W1 of the controlled drive unit 2 is at a low level, the drive transistor 22 is rendered non-conductive, so that the heated controlled drive unit 2 will not operate.

In some embodiments, the inkjet control circuit of the present invention can be, but is not limited to, applied to the control of the identification signal. FIG. 3 is a schematic diagram of the structure of the control identification signal type controlled driving unit of the present invention, as shown in Figures 1 and 3. In the context of controlling the identification signal, the controlled driving unit 11 of FIG. 1 is the control identification signal type controlled driving unit 3 of FIG. 3, and the power signal P of the control signal type controlled driving unit 3 is controlled to be one. The signal P2 is identified, and the control identification signal type controlled driving unit 3 further includes a fuse 31 and a driving transistor 32, which may be, but not limited to, a MOS transistor or a BJT transistor.

When the first control terminal W1 of the controlled driving unit 3 is at a high potential, the driving transistor 32 is caused to be turned on, and the identification signal P2 flows through the fuse 31 to cause the fuse 31 to be blown, when the controlled driving unit 3 is first. When the control terminal W1 is at a low potential, the driving transistor 32 is rendered non-conductive, so that the fuse 31 will not be blown. Further, if the identification signal P2 is to be read, the potential of the identification signal P2 can be changed to not The read potential that causes the fuse 31 to blow.

In summary, the present invention provides an inkjet control circuit that can control a controlled driving unit using a control signal of a small potential, thereby making the control mode more efficient and convenient, and directly controlling the controlled signal through a small potential. The driving unit can eliminate the need to additionally design a driving circuit or additionally add a driving signal source to drive the controlled driving unit, thereby reducing the circuit layout area and reducing the cost of the wafer.

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 control circuit
11‧‧‧Controlled drive unit
M1‧‧‧ first switch
M2‧‧‧ second switch
M3‧‧‧ third switch
M4‧‧‧fourth switch
2‧‧‧Heating controlled drive unit
21‧‧‧heating resistor
22‧‧‧Drive transistor
3‧‧‧Control identification signal type controlled drive unit
31‧‧‧Fuse
32‧‧‧Drive transistor
P‧‧‧Power signal
P1‧‧‧ power signal
P2‧‧‧ identification signal
COM‧‧‧Combined endpoint
A‧‧‧ conduction control signal
/A‧‧‧Reverse conduction control signal
W1‧‧‧First Control Endpoint
W2‧‧‧First Control Endpoint

Figure 1 is a schematic view showing the structure of an ink jet control circuit of the preferred embodiment of the present invention. The second figure is a schematic diagram of the structure of the heating type controlled driving unit implemented in the present case. The third figure is a schematic diagram of the structure of the controlled identification signal type controlled driving unit implemented in the present case.

1‧‧‧Inkjet control circuit

11‧‧‧Controlled drive unit

M1‧‧‧ first switch

M2‧‧‧ second switch

M3‧‧‧ third switch

M4‧‧‧fourth switch

P‧‧‧Power signal

COM‧‧‧Combined endpoint

A‧‧‧ conduction control signal

/A‧‧‧Reverse conduction control signal

W1‧‧‧First Control Endpoint

W2‧‧‧second control endpoint

Claims (7)

An inkjet control circuit for receiving a power signal, a conduction control signal, a reverse conduction control signal opposite to a conduction control signal, and connected to a common terminal, comprising: a controlled drive The unit receives the power signal and is connected to a ground, and is connected to the common terminal, and has a first control terminal to control whether the controlled driving unit operates; a first switch receives the power signal, and a control terminal is connected to the first control terminal of the controlled driving unit; a second switch receives the power signal and is connected to the first control terminal of the controlled driving unit, and has a a control terminal connected to the first switch to form a second control terminal; a third switch receiving the conduction control signal and connected to a common terminal, and the first switch and the second switch a second control terminal connected to the connection; and a fourth switch receiving the reverse conduction control signal and connected to a common terminal, and to the controlled drive unit a control terminal is connected; thereby, when the conduction control signal is a high potential signal, the third switch is turned on, causing the second switch to be turned on, and the first control terminal of the controlled driving unit is controlled to be high Operation, if the conduction control signal is a low potential signal, the reverse conduction control signal is a high potential signal, causing the fourth switch to be turned on, and the first switch is turned on, and the first control terminal of the controlled driving unit is Low potential and control does not work. The inkjet control circuit of claim 1, wherein the controlled driving unit is connected in series by a heating resistor and a driving transistor, and one end of the controlled driving unit receives the power signal, The other end is grounded to form a circuit. The inkjet control circuit of claim 1, wherein the controlled driving unit is composed of a fuse and a driving transistor. The inkjet control circuit of claim 1, wherein the first switch, the second switch, the third switch, and the fourth switch are each a switch of a MOS transistor. The inkjet control circuit of claim 1, wherein the power signal is 12 volts or more. The inkjet control circuit of claim 1, wherein the conduction control signal is 0 volts, 1.8 volts, 3.3 volts, or 5 volts. The inkjet control circuit of claim 1, wherein the reverse conduction control signal is 0 volts, 1.8 volts, 3.3 volts, or 5 volts.