CN113524918B

CN113524918B - Ink box chip, ink box and ink-jet printer

Info

Publication number: CN113524918B
Application number: CN202110694751.8A
Authority: CN
Inventors: 文冠果
Original assignee: Print Rite Technology Development Co Ltd of Zhuhai
Current assignee: Print Rite Technology Development Co Ltd of Zhuhai
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2023-05-02
Anticipated expiration: 2041-06-22
Also published as: CN113524918A

Abstract

The invention provides an ink box chip, an ink box and an ink-jet printer, wherein the ink box chip comprises a substrate, a memory and a plurality of connecting terminals are arranged on the substrate, the plurality of connecting terminals comprise a plurality of first terminals electrically connected with the memory, and the plurality of connecting terminals also comprise at least one high-voltage terminal; the substrate is provided with a first energy storage device, the first energy storage device supplies power to the memory through a first switching device, and the first switching device is controlled to be on-off by a second switching device; the substrate is also provided with a high-voltage driving circuit which receives a high-voltage signal from at least one high-voltage terminal and supplies power to the memory. The ink box chip is arranged on the side wall of the box body of the ink box, and the ink box can be installed on the ink-jet printer. The invention can avoid the damage of the memory caused by the over-high voltage, and can also avoid the situation that the memory cannot work due to the abnormal work of the storage battery, thereby ensuring the normal power supply of the memory.

Description

Ink box chip, ink box and ink-jet printer

Technical Field

The invention relates to the field of printing consumables, in particular to an ink box chip, an ink box with the ink box chip and an ink-jet printer.

Background

The electronic imaging device is used as common office equipment, great convenience is provided for modern office, common electronic imaging devices comprise printers, copiers and the like, the existing printers are divided into ink-jet printers and laser printers, and the ink-jet printers use ink cartridges containing ink as ink cartridges to jet ink to paper so as to form characters or patterns to be printed on the paper; the laser printer uses a toner cartridge containing toner as an ink cartridge to form text or patterns on a medium to be printed.

Referring to fig. 1, a conventional color inkjet printer has a housing 11, and the inkjet printer shown in fig. 1 omits a pallet of the housing 11. The housing 11 is provided with a cartridge 12 for an ink jet printer and a slide along which a carriage 14 reciprocates under the drive of a motor (not visible in fig. 1). An adapter plate (not visible in fig. 1) is provided in the carriage 14, and communicates with the movement 12 via a flat cable 13.

The carriage 14 is detachably provided with a plurality of ink cartridges 15, and different ink cartridges 15 contain different colors of ink. The structure of the ink cartridge 15 is shown in fig. 2. The ink cartridge 15 has a cartridge body 16, the cartridge body 16 encloses a chamber for accommodating ink, an ink outlet 17 is provided at the lower end of the chamber, and ink in the chamber flows out through the ink outlet 17 and is supplied to an ink supply needle of the carriage 14.

A chip 18 is mounted on the outer wall of the case 16 of the ink cartridge 15, the chip 18 having a substrate, and a plurality of connection terminals 19 are provided on one side of the substrate for electrical connection with the adapter plate. The other side of the substrate is provided with a memory (not visible in fig. 2), typically a non-volatile memory, such as an EEPROM or FLASH, which stores information related to the ink cartridge, including variable information, which is information that is continuously variable with the printing operation, such as information of the ink margin, the printing duration, the number of printing sheets, etc., and invariable information, which is information that is not variable with the printing operation, such as the type of the ink cartridge, the type of the applicable inkjet printer, the color of the ink, etc.

After the ink cartridge 15 is mounted to the carriage 14 of the ink jet printer, the ink jet printer powers up the chip 18 and reads data stored in the memory of the chip 18 to determine whether the type of the ink cartridge 15 is appropriate, whether the amount of ink remaining in the ink cartridge 15 is sufficient, and the like. The ink jet printer can perform a printing job only after the ink cartridge 15 is judged to be of a proper type and sufficient ink is contained in the ink cartridge 15.

Referring to fig. 3, a conventional chip 18 has 9 connection terminals on one surface of a substrate 20, and the connection terminals are arranged in two rows, namely, an upper row including four

connection terminals

21, 22, 23, 24, respectively, and a lower row including five

connection terminals

25, 26, 27, 28, 29, respectively. These connection terminals are divided into three groups, the first group of connection terminals being connection terminals electrically connected to the memory, typically located in the middle of each row of connection terminals,

e.g. connection terminals

22, 23, 26, 27, 28 being connection terminals for connection to the memory, wherein connection terminal 26 is a power terminal and connection terminal 27 is a ground terminal. The two

connection terminals

21, 24 at both ends of the first row are detection terminals, and the two connection terminals at both ends of the second row are

high voltage terminals

25, 29.

The

detection terminals

21, 24 may have various functions, the first being for detecting whether the ink cartridge 15 is mounted in place, and if the

detection terminals

21, 24 are electrically connected to the corresponding connection terminals on the side of the inkjet printer, the ink cartridge may be considered to be mounted in place. The second function is to realize the identification of the capacity of the ink cartridge, for example, the

detection terminals

21, 24 may be connected differently from the power supply terminal and the ground terminal, and the ink jet printer determines the type of the ink cartridge 15 by detecting the level of the

detection terminals

21, 24, thereby knowing the capacity information of the ink cartridge 15.

A sensor may be provided in the ink cartridge 15 for detecting the remaining amount of ink, but a relatively high voltage needs to be applied when the sensor is operating, and thus the

high voltage terminals

25, 29 are used to receive a high voltage pulse signal provided by the inkjet printer and are loaded at both ends of the sensor. However, if there is ink drop between the plurality of connection terminals, a phenomenon of short-circuiting between the plurality of connection terminals occurs, for example, ink drop between the

connection terminals

21, 25, 26, and once the high voltage terminal 25 is loaded with a higher voltage, the voltage on the connection terminal 26 will be also higher. If the connection terminal 26 is a connection terminal for supplying electric power to the memory, also called a power supply terminal, since the operating voltage of the memory is usually around 3.3 volts, if the connection terminal 26 is loaded with a higher voltage, the memory will burn out and even affect the operation of the inkjet printer.

For this reason, a detection circuit is provided in the cartridge of the ink jet printer, and the voltage of the

detection terminals

21, 24 is detected to determine whether an abnormality occurs, for example, ink drops fall between the

connection terminals

21, 25, 26, and when the high voltage terminal 25 is applied with a high dc voltage, the voltage of the detection terminal 21 increases, and when the ink jet printer detects that the voltage of the detection terminal 21 is too high, the high voltage terminal 25 is disconnected from being applied with a high dc voltage, thereby avoiding damage to the memory due to the high voltage of the connection terminal 26.

However, since the detection circuit is provided in the cartridge of the inkjet printer, the electrical signal of the detection terminal 21 needs to be transmitted to the inkjet printer, and the inkjet printer can determine the level of the detection terminal 21 and then disconnect the power supply to the high-voltage terminal 25. In general, it often takes several milliseconds from the detection of the level of the detection terminal 21 being too high to the disconnection of the power supply to the high-voltage terminal 25, possibly resulting in memory damage. Further, if abnormality of the detection terminal 21 or abnormality of the detection circuit is detected, the abnormality is not detected in time when the high voltage terminal 25 and the connection terminal 26 are short-circuited, and the memory is easily subjected to excessively high voltage for a long period of time, resulting in memory damage.

In order to solve the above-mentioned technical problem, another ink cartridge chip is known, which employs a battery to supply power to a memory, and is provided with a plurality of connection terminals on one surface of a substrate 40, as shown in fig. 4, the plurality of connection terminals are arranged in two rows, wherein a first row located above includes four connection terminals, respectively,

connection terminals

41, 42, 43, 44, and a second row located below also includes four connection terminals, respectively,

connection terminals

45, 47, 48, 49. Referring to fig. 5, a memory 50 is provided on the other side of the substrate 40.

Since the ink jet printer needs to load a high voltage signal to the

high voltage terminals

45, 49 for a short time before reading the data from the memory 50 or writing the data to the memory 50, the existing ink cartridge chip uses the high voltage signal loaded for a short time to control the power supply to the memory 50.

Referring to fig. 5, the memory 50 is powered by a battery, the cartridge chip controls discharge of the battery through a fet T1, the fet T1 is a high-level conductive fet, the drain thereof is connected to the battery, the source thereof is connected to the memory 50, and the gate thereof is connected to a fet T2. The field effect transistor T2 is a low-level conductive device, and its drain is connected to the gate of the field effect transistor T1. In addition, the drain of the field effect transistor T2 is also connected to a resistor R2. The source of the fet T2 is connected to the capacitor C4, and when the fet T2 is turned on, the capacitor C4 can discharge to the resistor R2.

The gate of the field effect transistor T2 is connected to the capacitor C3 and the resistor R1, and a diode D1 is connected between the capacitor C3 and the capacitor C4, the anode terminal of the diode D1 is connected to the capacitor C3, and the cathode terminal of the diode D1 is connected to the capacitor C4. The high voltage terminal 45 may supply power to the capacitor C3 through the diode D2, the anode terminal of the diode D2 is connected to the high voltage terminal 45, the cathode terminal is connected to one end of the resistor R3, and the other end of the resistor R3 is connected to the resistor R1.

In the conventional cartridge chip, the high voltage signal received by the high voltage terminal 45 in a short time is used to turn on the fet T1 in a short time after the high voltage signal disappears, so that the battery supplies power to the memory 50 through the fet T1 in a short time. When the high voltage terminal 45 is applied with a high voltage signal for a long time, the fet T1 is turned off, and the memory 50 is prevented from being damaged by an excessively high voltage. In addition, since the electric power used by the memory 50 is supplied from the storage battery, there is no need to provide a power supply terminal for receiving the direct-current voltage outputted from the inkjet printer and directly supplying the electric power to the memory 50 on the substrate 40, and there is a problem in that the memory 50 is damaged due to the power supply terminal being excessively high in voltage.

However, since the cartridge chip needs to be powered by a battery, the battery is usually installed in a battery holder, but the battery is easy to fall off from the holder or is in poor contact with an electrical contact of the battery due to the condition that vibration is easy to occur in the process of transporting and installing the cartridge, so that the battery cannot supply power to the memory 50 or is in poor power supply to the memory 50, which causes that the memory 50 cannot work normally, and then the normal work of the cartridge or even the ink-jet printer is affected.

Disclosure of Invention

A first object of the present invention is to provide a cartridge chip capable of effectively avoiding the memory from being loaded with an excessively high voltage and ensuring the memory to be powered.

A second object of the present invention is to provide an ink cartridge using the ink cartridge chip.

A third object of the present invention is to provide an ink jet printer having the above ink cartridge.

In order to achieve the first object of the present invention, the ink cartridge chip provided by the present invention includes a substrate, a memory and a plurality of connection terminals are provided on the substrate, the plurality of connection terminals include a plurality of first terminals electrically connected to the memory, and the plurality of connection terminals further include at least one high voltage terminal; the substrate is provided with a first energy storage device, the first energy storage device supplies power to the memory through a first switching device, and the first switching device is controlled to be on-off by a second switching device; the substrate is also provided with a high-voltage driving circuit which receives a high-voltage signal from at least one high-voltage terminal and supplies power to the memory.

According to the scheme, the memory is powered by the first energy storage device, and the second switching device is conducted within a period of time after the high-voltage terminal outputs the high-voltage signal and is converted into the low-level signal, so that the first switching device is controlled to be conducted, and the first energy storage device supplies power to the memory. On the one hand, when the high-voltage terminal is in a high-level state for a long time or in a low-level state for a long time, the second switching device is non-conductive, so that the first energy storage device does not supply power to the memory, and the rapid consumption of the electric quantity of the first energy storage device is avoided. In addition, since the memory is not supplied with power from the first connection terminal, even if the first connection terminal is loaded with a high voltage, the memory is not damaged.

On the other hand, because the substrate is also provided with the high-voltage driving circuit, and the high-voltage driving circuit receives the high-voltage signal output by the high-voltage terminal and supplies power to the memory, once the first energy storage device cannot supply power to the memory, the high-voltage driving circuit supplies power to the memory, so that the memory can still work normally when the first energy storage device cannot supply power normally.

In a preferred embodiment, the high voltage drive circuit comprises a resistor connected between the high voltage terminal and the memory.

Therefore, after the voltage received by the high-voltage terminal passes through the resistor, the voltage is adjusted, so that the voltage loaded to the memory is the rated working voltage of the memory, and the normal working of the memory is ensured.

The high-voltage driving circuit further comprises a second energy storage device, and one end of the second energy storage device is connected with the resistor. Preferably, the second energy storage device is a capacitor.

Therefore, the high-voltage driving circuit can still supply power to the memory in a period of time when the high-voltage signal disappears through the energy storage function of the second energy storage device, so that the memory can keep stable operation in a period of time. In addition, the capacitor has the functions of filtering and stabilizing voltage, and can ensure the stability of the voltage loaded to the memory.

Further, the high-voltage driving circuit further comprises a first diode, wherein an anode terminal of the first diode is connected to the resistor, and a cathode terminal of the first diode is connected to the memory.

Therefore, through the unidirectional conduction performance of the first diode, the first energy storage device can be prevented from outputting voltage to the high-voltage terminal, the first energy storage device is prevented from supplying power to the second energy storage device, and the first energy storage device is ensured to supply power to the memory only.

In a further scheme, the second switching device is connected between the third energy storage device and the control end of the first switching device, and the control end of the second switching device is connected with the fourth energy storage device.

Therefore, the voltage of the third energy storage device and the voltage of the fourth energy storage device are changed through the charge-discharge relation between the fourth energy storage device and the third energy storage device, so that the on-off state of the second switching device is changed, and the on-off time of the second switching device can be controlled.

In a further scheme, a second diode is connected between the fourth energy storage device and the third energy storage device, the anode end of the second diode is connected to the fourth energy storage device, and the cathode end of the second diode is connected to the third energy storage device.

Therefore, the second diode can prevent current from flowing from the third energy storage device to the fourth energy storage device, so that the current can flow unidirectionally, and the control requirement of the second switching device is met.

The invention provides another ink box chip which comprises a substrate, wherein a memory and a plurality of connecting terminals are arranged on the substrate, the plurality of connecting terminals comprise a plurality of first terminals electrically connected with the memory, and the plurality of connecting terminals also comprise at least one high-voltage terminal; the high-voltage driving circuit is further arranged on the substrate, receives a high-voltage signal output by the high-voltage terminal and supplies power to the memory, wherein the high-voltage driving circuit supplies power to the memory through the first switching device, and the first switching device is controlled to be on-off by the second switching device.

On the one hand, the high-voltage driving circuit receives the high-voltage signal output by the high-voltage terminal and supplies power to the memory, so that the memory does not need to be supplied with power by using a battery, and the problem that the memory cannot work due to poor contact between the battery and the memory is solved. On the other hand, because the high-voltage driving circuit does not directly supply power to the memory, but supplies power to the memory through the first switching device, when the high-voltage terminal outputs a high-voltage signal and converts the high-voltage signal into a low-level signal, the second switching device is conducted for a period of time, so that the first switching device is also conducted, the high-voltage driving circuit can supply power to the memory, namely, when the high-voltage driving circuit supplies power to the memory, the high-voltage driving circuit does not receive the high-voltage signal, and the high-voltage signal is not directly loaded on the memory, so that the memory is prevented from being damaged.

In order to achieve the second object, the ink cartridge provided by the invention comprises a cartridge body, wherein the cartridge body encloses a containing cavity, and the outer wall of the cartridge body is provided with the ink cartridge chip.

In order to achieve the third object, the present invention provides an inkjet printer comprising a machine body, wherein the ink cartridge is installed in the machine body.

Drawings

Fig. 1 is a structural diagram of a conventional ink jet printer.

Fig. 2 is a structural view of a conventional ink cartridge.

Fig. 3 is a structural diagram of a conventional ink cartridge chip.

Fig. 4 is a structural diagram of another conventional ink cartridge chip.

Fig. 5 is an electrical schematic of an embodiment of a prior art cartridge chip.

Fig. 6 is a block diagram of a first embodiment of the ink cartridge chip of the present invention.

Fig. 7 is an electrical schematic of a first embodiment of the ink cartridge chip of the present invention.

Fig. 8 is an electrical schematic of a second embodiment of the ink cartridge chip of the present invention.

The invention is further described below with reference to the drawings and examples.

Detailed Description

The ink cartridge of the present invention is an ink cartridge mounted on an ink jet printer, and the present invention will be described in detail with reference to examples.

Cartridge chip first embodiment:

as shown in fig. 6, the ink cartridge chip of the present embodiment is mounted on an ink cartridge for an inkjet printer, and has a substrate 60, one surface of the substrate 60 is provided with a plurality of connection terminals, and the plurality of connection terminals are arranged in two rows, wherein the first row located above includes four connection terminals, respectively,

connection terminals

61, 62, 63, 64, and the second row located below also includes four connection terminals, respectively, connection terminals 65, 67, 68, 69. Referring to fig. 7, a memory 70 is provided on the other surface of the substrate 60, and the memory 70 is a nonvolatile memory such as EFFROM or FLASH.

In this embodiment, the plurality of connection terminals on the substrate 60 are divided into three groups, the first group of connection terminals is the

first connection terminals

62, 63, 67, 68, and the first connection terminals include the chip select terminal CS, the clock terminal CLK, the ground terminal GND, the data terminal DAT, and the like, and the first connection terminals are electrically connected to the memory 70. As can be seen from fig. 6, these connection terminals are located in the middle of each row of connection terminals. In the present embodiment, the four first terminals do not include a power supply terminal that receives the direct-current voltage output from the inkjet printer and is directly used to supply power to the memory 70.

The second set of connection terminals are two

connection terminals

61, 64 at both ends of the first row, the

connection terminals

61, 64 are detection terminals, the third set of connection terminals are two connection terminals 65, 69 at both ends of the second row, these two connection terminals are high voltage terminals.

In the ink cartridge, there is provided a device having a high operating voltage, for example, a sensor for detecting the remaining amount of ink, such as a piezoelectric sensor, and high-voltage terminals 65, 69 are connected to both ends of the sensor, respectively. When the ink jet printer needs to detect the ink residual quantity, a high-voltage pulse signal is loaded to the high-voltage terminals 65 and 69 so that the piezoelectric sensor generates an oscillation signal. However, since the detection of the remaining ink is not performed in real time, and is usually performed before the start of a printing operation or after the completion of the printing operation, the high voltage terminals 65 and 69 are not loaded with high voltage pulse signals in real time, but are loaded with high voltage pulse signals at specific timing. In general, the highest voltage of the high-voltage pulse signal applied to the high-voltage terminals 65 and 69 by the inkjet printer can be 25v or more, and therefore, the high-voltage terminals 65 and 69 receive the high-voltage signal output from the inkjet printer.

In addition, since the ink jet printer often needs to load a high voltage signal, for example, a high voltage pulse signal of 25V or more, to the high voltage terminals 65, 69 for a short time before the data of the memory 70 is required to be read or before the data is written into the memory 70, the present embodiment can control the power supply of the memory 70 by using the high voltage pulse signal loaded for a short time.

Referring to fig. 7, the storage battery as the first energy storage device of the present embodiment supplies power to the memory 70, and preferably, the storage battery is a non-chargeable storage battery, i.e., it will not be chargeable and only dischargeable after being packaged in the cartridge chip. Because the ink box chip area is very small, and the space for installing the ink box chip on the ink box is very small, the storage battery with larger volume cannot be arranged on the ink box chip, therefore, the electric energy stored in the storage battery is limited, and the discharging time of the storage battery needs to be strictly controlled.

In this embodiment, the discharge of the battery is controlled by the fet T11 as the first switching device, the fet T11 is a high-level conductive fet, the drain thereof is connected to the battery, the source thereof is connected to the memory 70, and the gate thereof as the control terminal is connected to the fet T12. The fet T12 is a second switching device of the present embodiment, which is a low-level conductive device, and the drain of the fet T12 is connected to the gate of the fet T11. In addition, the drain of the field effect transistor T12 is also connected to a resistor R13.

The source of the fet T12 is connected to the capacitor C13, in this embodiment, the capacitor C13 is a third energy storage device, the resistor R13 is an energy dissipation device, and when the fet T12 is turned on, the capacitor C13 can discharge to the resistor R13.

The grid electrode of the field effect transistor T12 is connected to a capacitor C14 serving as a fourth energy storage device and is also connected to a resistor R12 serving as an energy consumption device, a diode D12 serving as a second diode is connected between the capacitor C13 and the capacitor C14, the anode end of the diode D12 is connected to the capacitor C14, and the cathode end of the diode D12 is connected to the capacitor C13.

Further, the high voltage terminal 65 may supply power to the capacitor C14 through the diode D13 as a third diode, an anode terminal of the diode D13 is connected to the high voltage terminal 65, a cathode terminal is connected to one end of the resistor R14, and the other end of the resistor R14 is connected to the resistor R12.

In addition, the present embodiment further provides a high-voltage driving circuit including a resistor R11, a capacitor C12 as a second energy storage device, and a diode D11 as a first diode, the high-voltage terminal 65 charges the capacitor C12 through the resistor R11, the anode terminal of the diode D11 is connected to the resistor R11, and the cathode terminal supplies power to the memory 70. Thus, when the high voltage terminal 65 receives a high voltage signal, the capacitor C12 is charged through the resistor R11, and the memory 70 is supplied with power through the diode D11.

By setting the resistor R11 having a suitable resistance value, the voltage applied to the memory 70 can be set to the rated operating voltage, and the memory 70 can be prevented from being damaged by an excessively high voltage. On the other hand, the capacitor C12 has the functions of energy storage, filtering and voltage stabilization, so that the voltage loaded into the memory 70 is prevented from being spiked or instantaneously changed.

When the ink jet printer does not load the high voltage signal to the high voltage terminal 65, the high voltage terminal 65 outputs a low level signal, that is, the diode D13 is not turned on, and at this time, the point A1 is the low level signal, and the fet T12 is in a conductive state. However, since the capacitor C14 and the capacitor C13 are not charged, the point B1 is also a low-level signal, the capacitor C13 cannot discharge to the resistor R13, the point C1 is also a low-level signal, the field effect transistor T11 is in an off state, and the battery cannot supply power to the memory 70. Also, since the diode D11 is also non-conductive, the high voltage driving circuit does not supply power to the memory 70.

When the ink jet printer loads a high voltage signal to the high voltage terminal 65, for example, the ink jet printer loads the high voltage signal to the high voltage terminal 65 for a long period of time, the dc voltage of the high voltage terminal 65 charges the capacitor C14 after passing through the diode D13 and the resistor R14, at this time, the point A1 is a high level signal, and the gate of the fet T12 is high level and is in a cut-off state. Since point A1 is high, current will flow through diode D12 and charge capacitor C13. However, since the fet T12 is in the off state, current cannot flow through the fet T12 to the resistor R13, the point C1 is still in the low-level state, the signal received by the gate of the fet T11 is a low-level signal, the fet T11 is still off, and the battery cannot supply power to the memory 70.

At the same time, the high voltage terminal 65 charges the capacitor C12 through the resistor R11, and the voltage applied to the memory 70 gradually rises because the voltage of the capacitor C12 cannot be suddenly changed. In addition, the voltage applied to the memory 70 is not excessively high due to the resistor R11, which may cause damage to the memory 70.

Before the ink jet printer needs to write data to the memory 70 or read data from the memory 70, the ink jet printer loads the high voltage signal to the high voltage terminal 65 for a short time and immediately changes to the low level signal after loading the high voltage signal, and the high voltage signal has a duration of often only several tens milliseconds to several hundreds milliseconds.

After the high voltage terminal 65 is loaded with the high voltage signal, the capacitor C14 starts to charge, but since the high level duration is short, the amount of charge of the capacitor C13 is very small, and thus the point B1 is still in the low level state. In the period in which the high voltage terminal 65 is applied with the high voltage signal, the point A1 is the high level signal, the fet T12 is turned off, the gate of the fet T11 is also the low level signal and is turned off, and the battery cannot discharge to the memory 70.

When the point A1 remains high for a while since the capacitor C14 is continuously discharged for a while after the level signal output from the high voltage terminal 65 is converted into the low level signal, the capacitor C14 is discharged through the resistor R12 and the current of the capacitor C14 can be charged to the capacitor C13 through the diode D12. Since the fet T12 is kept in the off state, the capacitor C13 is not discharged, and thus the B1 point voltage drop gradually increases. As the capacitor C14 continues to discharge, the voltage at the point A1 will gradually decrease, and when the voltage at the point A1 is lower than the voltage at the point B1 (or the voltage at the point A1 decreases to a low level state), the fet T12 is turned on, the capacitor C13 discharges to the resistor R13 through the fet T12, at this time, a voltage is formed on the resistor R13, the point C1 is a high level signal, the fet T11 is turned on, and the battery supplies power to the memory 70.

Because the amount of electricity stored in the capacitor C13 is limited, the capacitor C13 is discharged for a period of time, and the high level state at the point C1 can be maintained for a short period of time, for example, only for one or two seconds, so that the on time of the fet T11 can be maintained for a short period of time. Since the communication between the inkjet printer and the memory 70 is often completed in a very short time, the on-time of the fet T11 can satisfy the need of the inkjet printer to read and write data to and from the memory 70.

After the capacitor C13 is discharged, the point C1 becomes a low level signal, the fet T11 returns to the off state again, and the battery cannot supply power to the memory 70, so as to avoid the battery from supplying power to the memory 70 for a long time and causing the electric energy of the battery to be consumed too quickly, and ensure that the electric energy of the battery can be used for a long time. The time of each discharge of the storage battery to the memory 70 depends on the discharge time of the capacitor C13, so that the capacitor C13 with a suitable capacity can be set according to the actual requirement to meet the requirement of the discharge of the storage battery to the memory 70.

Similarly, when the high voltage terminal 65 receives the high voltage signal for a short time, the high voltage driving circuit supplies power to the memory 70 for a short time, thereby ensuring the operation of the memory 70.

Therefore, if the high voltage terminal 65 is in the low level state for a long time or in the high level state for a long time, the fet T11 is turned off, and the fet T11 is turned on only in a very short time when the high voltage terminal is converted into the low level after being loaded with the high level, and the storage battery supplies power to the memory 70, so that the too fast consumption of the electric quantity of the storage battery can be avoided, and the long-time use of the ink cartridge chip can be ensured.

Since in the present embodiment, the condition that the memory 70 obtains the electric power is that the high voltage terminal 65 receives the high voltage signal, the memory 70 can be understood as a device that is driven to operate when the inkjet printer outputs the high voltage signal to the high voltage terminal 65, that is, the operation of the memory 70 is realized based on the high voltage signal.

In addition, the memory 70 of the embodiment adopts two different power supply modes, and even if the storage battery cannot supply power to the memory 70 due to loosening of the storage battery clamping box of the storage battery, the high-voltage driving circuit can be used for supplying power, so that stable power supply of the memory 70 can be ensured, and normal operation of the memory 70 is ensured.

Cartridge chip second embodiment:

the ink cartridge chip of this embodiment has a base plate, and the one side of base plate is equipped with a plurality of connecting terminals, and a plurality of connecting terminals arrange into two rows, including four first connecting terminals, two detection terminals and two high-voltage terminals that are connected with the memory, and the arrangement of a plurality of connecting terminals is the same with first embodiment, and the description is omitted.

Referring to fig. 8, the present embodiment is provided with a high-voltage driving circuit including a resistor R21, a capacitor C21, and a diode D21, the high-voltage terminal 65 charges the capacitor C21 through the resistor R21, the anode terminal of the diode D21 is connected to the resistor R21, and the cathode terminal supplies power to the memory 70. In this way, when the high voltage terminal 65 receives the high voltage signal, the capacitor C21 is charged through the resistor R21, and the high voltage driving circuit supplies power to the memory 70 through the field effect transistor T21 of the first switching device.

The fet T21 is a high-level conductive fet, the drain of which is connected to the cathode terminal of the diode D21, the source of which is connected to the memory 70, and the gate serving as the control terminal of which is connected to the fet T22. The fet T22 is a low-level on device as the second switching device of the present embodiment, and the drain of the fet T22 is connected to the gate of the fet T21. In addition, the drain of the field effect transistor T22 is also connected to a resistor R23.

The source of the fet T22 is connected to the capacitor C23, and when the fet T22 is turned on, the capacitor C23 can discharge to the resistor R23. The gate of the field effect transistor T22 is connected to the capacitor C24 and is also connected to the resistor R22, and a diode D22 is connected between the capacitor C23 and the capacitor C24, the anode terminal of the diode D22 is connected to the capacitor C24, and the cathode terminal of the diode D22 is connected to the capacitor C23.

Further, the high voltage terminal 65 may supply power to the capacitor C24 through the diode D23, the anode terminal of the diode D23 is connected to the high voltage terminal 65, the cathode terminal is connected to one end of the resistor R24, and the other end of the resistor R24 is connected to the resistor R22.

When the high voltage terminal 65 is not applied with a high voltage signal by the inkjet printer, the high voltage terminal 65 outputs a low level signal, that is, the diode D23 is not turned on, and at this time, the point A2 is a low level signal, and the fet T22 is in a conductive state. However, since the capacitor C24 and the capacitor C23 are not charged, the point B2 is also a low-level signal, the capacitor C23 cannot discharge to the resistor R23, the point C2 is also a low-level signal, the field effect transistor T21 is in an off state, and the high-voltage driving circuit cannot supply power to the memory 70. In addition, since the diode D21 is also non-conductive.

When the ink jet printer loads a high voltage signal to the high voltage terminal 65, for example, the ink jet printer loads the high voltage signal to the high voltage terminal 65 for a long period of time, the dc voltage of the high voltage terminal 65 charges the capacitor C24 after passing through the diode D23 and the resistor R24, at this time, the point A2 is a high level signal, and the gate of the fet T22 is high level and is in a cut-off state. Since point A2 is high, current will flow through diode D22 and charge capacitor C23. However, since the fet T22 is in the off state, current cannot flow through the fet T22 to the resistor R23, the point C2 is still in the low-level state, the signal received by the gate of the fet T21 is a low-level signal, the fet T21 is still off, and the high-voltage driving circuit cannot supply power to the memory 70.

After the high voltage terminal 65 is loaded with the high voltage signal, the capacitor C24 starts to charge, but since the high level duration is short, the amount of charge of the capacitor C23 is very small, and thus the point B2 is still in the low level state. In the period in which the high voltage terminal 65 is applied with the high voltage signal, the point A2 is the high level signal, the fet T22 is turned off, the gate of the fet T21 is also the low level signal and turned off, and the high voltage driving circuit cannot discharge to the memory 70. In addition, after the high voltage terminal 65 is briefly applied with a high voltage signal, the capacitor C21 is charged. However, since the fet T21 is in the off state, the capacitor C21 is not discharged to the memory 70.

When the point A2 remains high for a while since the capacitor C24 is continuously discharged for a while after the level signal output from the high voltage terminal 65 is converted into the low level signal, the capacitor C24 is discharged through the resistor R22 and the current of the capacitor C24 can be charged to the capacitor C23 through the diode D22. Since the fet T22 is kept in the off state, the capacitor C23 is not discharged, and thus the B2 point voltage drop gradually increases. As the capacitor C24 continues to discharge, the voltage at the point A2 will gradually decrease, and when the voltage at the point A2 is lower than the voltage at the point B2, the fet T22 is turned on, the capacitor C23 discharges to the resistor R23 through the fet T22, at this time, a voltage is formed on the resistor R23, the point C2 is a high level signal, the fet T21 is turned on, and the high voltage driving circuit supplies power to the memory 70, that is, supplies power to the memory 70 using the electric energy stored in the capacitor C21.

Since the communication between the inkjet printer and the memory 70 is often completed in a very short time, the on-time of the fet T21 can satisfy the need of the inkjet printer to read data from and write data to the memory 70. After the capacitor C23 is discharged, the point C2 becomes a low level signal, the fet T21 returns to the off state again, and the high voltage driving circuit cannot supply power to the memory 70.

It can be seen that, in this embodiment, the storage 70 is not required to be powered by the battery, and the electrical energy required by the storage 70 is completely derived from the high voltage signal received by the high voltage terminal 65, so that the problem that the storage 70 cannot work normally due to the fact that the storage battery cannot supply power to the storage 70 is avoided, and the storage battery is not required to be arranged on the ink cartridge chip, so that the production cost is lower. In addition, since the electric power used by the memory 70 is entirely derived from the high voltage signal received by the high voltage terminal 65, the memory 70 can be understood as a device driven to operate when the inkjet printer outputs the high voltage signal to the high voltage terminal 65, i.e., the operation of the memory 70 is realized based on the high voltage signal, and no low voltage power supply is required on the cartridge chip.

In addition, since the fet T21 is in the off state when the high voltage terminal 65 receives the high voltage signal for a long time, it is possible to prevent the memory 70 from being damaged by receiving an excessively high voltage.

Ink cartridge embodiment:

the embodiment is provided with a shell, the shell encloses a cavity for containing ink, an ink outlet communicated with the cavity is arranged below the cavity, and the ink in the cavity can flow out through the ink outlet. And, a cartridge chip according to the above-described embodiment of the present invention is detachably mounted on one outer wall of the housing.

Inkjet printer embodiment:

the ink jet printer of this embodiment is provided with a body in which a housing chamber for housing the ink cartridge is formed.

Finally, it should be emphasized that the invention is not limited to the embodiments described above, that the switching devices used are not necessarily field effect transistors, that instead of field effect transistors, a triode may be used, and that these modifications shall also be included in the scope of the claims of the invention.

Claims

1. An ink cartridge chip comprising:

a substrate, on which a memory and a plurality of connection terminals are arranged, wherein the plurality of connection terminals comprise a plurality of first terminals electrically connected with the memory, and the plurality of connection terminals further comprise at least one high-voltage terminal;

the method is characterized in that:

the substrate is also provided with a high-voltage driving circuit, the high-voltage driving circuit receives a high-voltage signal from at least one high-voltage terminal and supplies power to the memory, the high-voltage driving circuit supplies power to the memory through a first switching device, and the first switching device is controlled to be on-off by a second switching device;

the memory is only powered by the high voltage drive circuit;

the high-voltage driving circuit is provided with a first capacitor connected between the high-voltage terminal and the first switching device, the grid electrode of the second switching device is connected with a fourth capacitor, the source electrode of the second switching device is connected with a third capacitor, a diode is connected between the third capacitor and the fourth capacitor, the anode of the diode is connected with the fourth capacitor, the cathode of the diode is connected with the third capacitor, the drain electrode of the second switching device is connected with the grid electrode of the first switching device, and the source electrode of the second switching device is connected with the third capacitor;

the first capacitor is charged when the high-voltage terminal is transiently loaded with a high-voltage signal, and after the high-voltage terminal is transiently loaded with the high-voltage signal and after a period of time after the level signal output by the high-voltage terminal is converted into a low-level signal, when the grid electrode of the first switching device is at a high level, the first switching device is conducted, so that the high-voltage terminal supplies power to the memory.

2. The cartridge chip of claim 1, wherein:

the high voltage drive circuit includes a resistor connected between the high voltage terminal and the memory.

3. An ink cartridge, comprising:

the box body encloses a containing cavity;

the method is characterized in that:

the cartridge chip as claimed in claim 1 or 2 is provided on the outer wall of the cartridge body.

4. An ink jet printer comprising a body, wherein the ink cartridge according to claim 3 is mounted in the body.