WO2022017350A1

WO2022017350A1 - Ink cartridge chip, ink cartridge and ink-jet printer

Info

Publication number: WO2022017350A1
Application number: PCT/CN2021/107255
Authority: WO
Inventors: 文冠果; 付志平; 车秩柳; 罗寿杰
Original assignee: 珠海天威技术开发有限公司
Priority date: 2020-07-22
Filing date: 2021-07-20
Publication date: 2022-01-27

Abstract

The present invention relates to the field of printing consumables. Specifically, provided are an ink cartridge chip, an ink cartridge and an ink-jet printer. The ink cartridge chip comprises a substrate, wherein the substrate is provided with a memory and a plurality of connecting terminals, the plurality of connecting terminals comprising a plurality of first terminals that are electrically connected to the memory, and the plurality of connecting terminals further comprising at least one high-voltage terminal; and the substrate is provided with a first energy storage device, the first energy storage device supplying power to the memory by means of a first switch device, and the first switch device being turned on within a first pre-set time after a high-level signal outputted by the high-voltage terminal is converted into a low-level signal, and being cut off within a second pre-set time in which the high-level signal outputted by the high-voltage terminal is converted into a low-level signal. The ink cartridge chip is arranged on a side wall of the cartridge body of the ink cartridge, and the ink cartridge can be installed in the ink-jet printer.

Description

Ink cartridge chips, ink cartridges and inkjet printers

technical field

The invention relates to the field of printing consumables, in particular to an ink cartridge chip, an ink cartridge having the above ink cartridge chip, and an inkjet printer.

Background technique

As a common office equipment, electronic imaging equipment provides great convenience for modern office. Common electronic imaging equipment includes printers, copiers, etc. The existing printers are divided into inkjet printers and laser printers. The ink cartridge used as an ink cartridge ejects ink to the paper to form the text or pattern to be printed on the paper; the laser printer uses the toner cartridge containing the toner as an ink cartridge to form the text or pattern to be printed on the medium.

Referring to FIG. 1 , a conventional color inkjet printer has a casing 11 , and the inkjet printer shown in FIG. 1 omits the support plate of the casing 11 . The casing 11 is provided with the core 12 of the inkjet printer, and is provided with a sliding rod. The printing carriage 14 reciprocates along the sliding rod driven by the motor (not visible in FIG. 1 ). An adapter plate (not visible in FIG. 1 ) is arranged in the printing carriage 14 , and the adapter plate communicates with the movement 12 through the cable 13 .

A plurality of ink cartridges 15 are detachably mounted on the print carriage 14, and different ink cartridges 15 contain inks of different colors. The structure of the ink cartridge 15 is shown in FIG. 2 . The ink cartridge 15 has a box body 16, and the box body 16 encloses a cavity for accommodating ink. The lower end of the cavity is provided with an ink outlet 17. The ink in the cavity flows out through the ink outlet 17 and is supplied to the ink supply needle of the printing carriage 14. Ink supply.

A chip 18 is mounted on the outer wall of the box body 16 of the ink cartridge 15. The chip 18 has a substrate, and one side of the substrate is provided with a plurality of connection terminals 19 for electrical connection with the adapter board. The other side of the substrate is provided with a memory (not visible in Figure 2), usually, the memory is a non-volatile memory, such as EEPROM or FLASH, which stores information related to the ink cartridge, including variable information and constant information, Variable information is information that changes with printing operations, such as ink remaining, printing time, and number of printed sheets. Constant information is information that does not change with printing operations, such as ink cartridge model, applicable inkjet printer model, etc. , ink color, etc.

After the ink cartridge 15 is installed in the print carriage 14 of the inkjet printer, the inkjet printer powers up the chip 18 and reads the data stored in the memory of the chip 18 to determine whether the model of the ink cartridge 15 is suitable and whether the remaining ink amount in the ink cartridge 15 is not. Sufficient and so on. Only after it is determined that the ink cartridge 15 is of a suitable model and that there is sufficient ink in the ink cartridge 15, the inkjet printer can perform the printing job.

Referring to FIG. 3 , a surface of a substrate 20 of an existing chip 18 is provided with 9 connection terminals, and the plurality of connection terminals are arranged in two upper and lower rows, wherein the first row located above includes four connection terminals, which are respectively The connection terminals 21 , 22 , 23 , and 24 , and the second row located below includes five connection terminals, which are the connection terminals 25 , 26 , 27 , 28 and 29 respectively. These connection terminals are divided into three groups. The first group of connection terminals is the connection terminals that are electrically connected to the memory, usually located in the middle of each row of connection terminals. connection terminals, wherein the connection terminal 26 is a power supply terminal, and the connection terminal 27 is a ground terminal. The two connection terminals 21 and 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 and 29 .

The detection terminals 21 and 24 can have multiple functions. The first function is to detect whether the ink cartridge 15 is installed in place. If the detection terminals 21 and 24 are electrically connected to the corresponding connection terminals on the inkjet printer side, it can be considered that the ink cartridge has been installed in place. . The second function is used to identify the capacity of the ink cartridge. For example, the detection terminals 21 and 24 can be connected in different ways with the power terminal and the ground terminal. The inkjet printer determines the level of the ink cartridge 15 by detecting the levels of the detection terminals 21 and 24 model, so as to know the capacity information of the ink cartridge 15.

A sensor can be provided in the ink cartridge 15 to detect the remaining ink level, but a higher voltage needs to be applied when the sensor is working. Therefore, the high-voltage terminals 25 and 29 are used to receive the high-voltage pulse signal provided by the inkjet printer and load it on the sensor. both ends. However, if ink droplets fall between the multiple connection terminals, it will cause a short circuit between the multiple connection terminals. For example, ink droplets fall between the connection terminals 21, 25, and 26. Loading with a higher voltage will result in a higher voltage on the connection terminal 26 as well. If the connection terminal 26 is a connection terminal for supplying power to the memory, it is also called a power supply terminal. Since the working voltage of the memory is usually about 3.3 volts, if the connection terminal 26 is loaded with a higher voltage, it will cause the memory to burn, and even affect the The work of an inkjet printer.

To this end, a detection circuit is installed in the core of the inkjet printer, and the voltage of the detection terminals 21, 24 is detected to determine whether there is an abnormal phenomenon, such as ink droplets falling between the connection terminals 21, 25, 26, when the high voltage When the terminal 25 is loaded with a high DC voltage, the voltage of the detection terminal 21 will increase. Once the inkjet printer detects that the voltage of the detection terminal 21 is too high, it will disconnect the high-voltage DC power supply to the high-voltage terminal 25 to avoid the connection of the terminal 26. The high voltage can damage the memory.

However, since the detection circuit is arranged in the core of the inkjet printer, the electric signal of the detection terminal 21 needs to be transmitted to the inkjet printer, so that the inkjet printer can judge the level of the detection terminal 21, and then disconnect the high voltage Power supply to terminal 25. Usually, it often takes several milliseconds from the detection of the detection terminal 21 being too high to the disconnection of the power supply of the high voltage terminal 25, which may cause damage to the memory. In addition, once the detection terminal 21 is abnormal, or the detection circuit is abnormal, and the high-voltage terminal 25 and the connection terminal 26 are short-circuited and not detected in time, it is easy to cause the memory to be loaded with an excessively high voltage for a long time, resulting in memory damage. Therefore, the substrate The power terminals on 20 are loaded with too high voltage is the main cause of memory damage.

technical problem

The first object of the present invention is to provide an ink cartridge chip that can effectively prevent the memory from being loaded with an excessively high voltage.

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

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

technical solutions

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 arranged on the substrate, and the plurality of connection terminals include a plurality of first terminals electrically connected to the memory, and the plurality of connection terminals. It also includes at least one high-voltage terminal; wherein, the substrate is provided with a first energy storage device, the first energy storage device supplies power to the memory through the first switching device, and the first switching device outputs a high-level signal at the high-voltage terminal to convert to a low level It is turned on within the first preset time after the signal, and turned off during the second preset time when the high-level signal output by the high-voltage terminal is converted into a low-level signal.

A preferred solution is that the first switching device is controlled on and off by the second switching device, the second switching device is connected between the second energy storage device and the control terminal of the first switching device, and the control terminal of the second switching device is connected with a The third energy storage device.

A further solution is that a first diode is connected between the third energy storage device and the second energy storage device, the anode end of the first diode is connected to the third energy storage device, and the cathode end of the first diode is connected to the third energy storage device. connected to the second energy storage device.

In a further solution, the third energy storage device is further connected with the first energy consumption device and the third energy storage device charging control device.

A further solution is that a second diode is connected between the high voltage terminal and the charging control device of the third energy storage device, the high voltage terminal is connected to the anode end of the second diode, and the cathode end of the second diode is connected to the second diode. The third energy storage device charge control device.

In a further solution, the third energy storage device is connected with the first energy dissipation device and the second diode, and the second diode is also connected with the third energy storage device charging control device.

A further solution is that a second diode is connected between the third energy storage device charging control device and the third energy storage device, the high-voltage terminal is connected to one end of the third energy storage device charging control device, and the third energy storage device The other end of the charging control device is connected to the anode end of the second diode, and the cathode end of the second diode is connected to the third energy storage device.

In a further solution, the second switching device is further connected with a second energy consuming device, and the second energy storage device discharges to the second energy consuming device through the second switching device.

In a further solution, the first switching device is a high-level conducting device, and the second switching device is a low-level conducting device.

Another ink cartridge chip provided by the present invention includes a substrate, a memory and a plurality of connection terminals are arranged 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 And, the substrate is provided with a first energy storage device, the first energy storage device supplies power to the memory through the first switching device, and the first switching device is controlled by the second switching device on-off; The drive circuit receives the high voltage signal from the at least one high voltage terminal and supplies power to the memory.

A preferred solution is that the high voltage drive circuit includes a resistor connected between the high voltage terminal and the memory.

In a further solution, the high-voltage driving circuit further includes a third diode, the anode terminal of the third diode is connected to the resistor, and the cathode terminal of the third diode is connected to the memory.

In a further solution, the high-voltage driving circuit further includes a fourth energy storage device, and one end of the fourth energy storage device is connected to the resistor and the anode end of the third diode.

Another ink cartridge chip provided by the present invention includes a substrate, a memory and a plurality of connection terminals are arranged 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 ; wherein, a high-voltage drive circuit is also provided on the substrate, the high-voltage drive circuit receives a high-voltage signal from at least one high-voltage terminal, and supplies power to the memory, wherein the high-voltage drive circuit supplies power to the memory through a first switching device, and the first switching device is powered by the second The switching device controls the on-off.

In order to achieve the second objective above, the ink cartridge provided by the present invention includes a box body, the box body encloses a accommodating cavity, and the above-mentioned ink cartridge chip is arranged on the outer wall of the box body.

In order to achieve the third object above, the inkjet printer provided by the present invention includes a body, and the above-mentioned ink cartridge is installed in the body.

beneficial effect

In the ink cartridge chip of the present invention, the memory is powered by the first energy storage device, and within a period of time after the high-level signal is output from the high-voltage terminal and converted into a low-level signal, the second switch device is turned on, thereby controlling the first switch The device is turned on, and the first energy storage device supplies power to the first switching device. That is to say, 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 will not supply power to the memory, avoiding The power of the first energy storage device is rapidly consumed. Furthermore, since the memory is not powered by the first connection terminal, even if the first connection terminal is loaded with a higher voltage, the memory will not be damaged.

In addition, the present invention changes the voltage of the second energy storage device and the third energy storage device through the charge-discharge relationship between the third energy storage device and the second energy storage device, thereby changing the on-off state of the second switching device. The on-off time of the second switching device can be controlled.

In addition, the present invention can prevent the current from flowing from the second energy storage device to the third energy storage device through the first diode, thereby ensuring that the current can only flow in one direction and meeting the control requirements of the second switching device.

In addition, the discharge of the third energy storage device is realized by the first energy consuming device, so as to change the voltage of the third energy storage device and realize the change of the on-off state of the second switching device.

The high-voltage terminal of the present invention supplies power to the third energy storage device through the second diode, so that the level signal output from the high-voltage terminal can control the charge and discharge of multiple energy storage devices, thereby realizing the on-off of the two switching devices. state control.

In addition, the present invention can realize the discharge of the second energy storage device through the second energy consuming device, so as to avoid the second energy storage device being in a high-level state for a long time, thereby avoiding the problem that the electricity of the first energy storage device is released too quickly.

In another ink cartridge chip provided by the present invention, since a high-voltage driving circuit is also provided on the substrate, and the high-voltage driving circuit receives the high-voltage signal output by the high-voltage terminal and supplies power to the memory, therefore, once the first energy storage device cannot supply power to the memory , the high-voltage driving circuit will supply power to the memory, so as to ensure that the memory can still work normally when the first energy storage device cannot be powered normally.

In addition, after the voltage received by the high-voltage terminal passes through the resistor, the voltage is adjusted so that the voltage loaded into the memory is the rated working voltage of the memory, thereby ensuring the normal operation of the memory.

In addition, through the energy storage function of the first energy storage device, the high-voltage driving circuit can still supply power to the memory within a period of time when the high-voltage signal disappears, ensuring that the memory can maintain stable operation for a period of time. In addition, the capacitor has the functions of filtering and voltage regulation, and can also ensure the stability of the voltage loaded into the memory.

In addition, through the unidirectional conduction performance of the third diode, it is possible to prevent the first energy storage device from outputting voltage to the high-voltage terminal, and also prevent the fourth energy storage device from supplying power to the fourth energy storage device, ensuring that the first energy storage device only supplies power to the high voltage terminal. memory supply.

Description of drawings

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

FIG. 2 is a structural diagram of a conventional ink cartridge.

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

FIG. 4 is a structural diagram of the first embodiment of the ink cartridge chip of the present invention.

FIG. 5 is an electrical schematic diagram of the first embodiment of the ink cartridge chip of the present invention.

6 is an electrical schematic diagram of the second embodiment of the ink cartridge chip of the present invention.

FIG. 7 is an electrical schematic diagram of the third embodiment of the ink cartridge chip of the present invention.

FIG. 8 is an electrical schematic diagram of the fourth embodiment of the ink cartridge chip of the present invention.

The present invention will be further described below with reference to the accompanying drawings and embodiments.

Embodiments of the present invention

The ink cartridge of the present invention is an ink cartridge installed on an inkjet printer, and the present invention will be described in detail below with reference to each embodiment.

The first embodiment of the ink cartridge chip:

The ink cartridge chip of this embodiment is an ink cartridge chip installed in an ink cartridge for an inkjet printer, and has a substrate 40. One side of the substrate 40 is provided with a plurality of connection terminals. As shown in FIG. 4, the plurality of connection terminals are arranged in two rows. The first row above includes four connection terminals, which are connection terminals 41, 42, 43, and 44, and the second row below also includes four connection terminals, which are connection terminals 45, 47, 48, and 49. Referring to FIG. 5 , a memory 50 is provided on the other side of the substrate 40 , and the memory 50 is a non-volatile memory such as EEPROM or FLASH.

In this embodiment, the plurality of connection terminals on the substrate 40 are divided into three groups, the first group of connection terminals is the first connection terminals 42, 43, 47, 48, and the first connection terminals include the chip select terminal CS, the clock terminal CLK, The ground terminal GND, the data terminal DAT, etc., the first connection terminal is electrically connected to the memory 50 . It can be seen from FIG. 4 that these connection terminals are located in the middle of each row of connection terminals. In this embodiment, the four first terminals do not include a power terminal that receives the DC voltage output by the inkjet printer and is directly used to supply power to the memory 50 .

The second group of connection terminals are the two connection terminals 41 and 44 at both ends of the first row, the connection terminals 41 and 44 are the detection terminals, and the third group of connection terminals are the two connection terminals 45 and 49 at both ends of the second row. One connection terminal is a high voltage terminal.

A device with a relatively high operating voltage is arranged in the ink cartridge, for example, a sensor for detecting the remaining amount of ink, such as a piezoelectric sensor, and the high-voltage terminals 45 and 49 are respectively connected to both ends of the sensor. When the inkjet printer needs to detect the remaining amount of ink, a relatively high high-voltage pulse is applied to the high-voltage terminals 45 and 49 to make the piezoelectric sensor generate an oscillating signal. However, since the detection of the ink remaining amount is not carried out in real time, it is usually carried out before the start of a printing operation or after the printing operation is completed. Therefore, the high-voltage terminals 45 and 49 are not loaded with high-voltage pulses in real time, but It is only at a specific moment that a higher high-voltage pulse is loaded. Usually, the highest voltage of the high-voltage pulse loaded by the inkjet printer to the high-voltage terminals 45 and 49 can usually reach more than 25 volts. In the prior art, a power terminal is provided on the ink cartridge chip. If the high-voltage terminal is short-circuited with the power terminal, the higher voltage The DC voltage will be directly loaded on the power supply pin (VCC pin) of the memory, thereby causing damage to the memory, which is also the main reason for the damage to the memory of the existing ink cartridge chip.

In addition, before the inkjet printer needs to read the data of the memory 50 or write data to the memory 50, it is often necessary to load a high-voltage signal to the high-voltage terminals 45 and 49 for a short time, for example, to load a high-voltage pulse above 25V. For example, the short-time loaded high-voltage pulse signal can be used to control the power supply of the memory 50 .

Referring to FIG. 5 , the memory 50 is powered by a storage battery. The storage battery in this embodiment is a non-rechargeable storage battery, that is, after being packaged in the ink cartridge chip, it cannot be charged, but can only be discharged. Due to the small area of the ink cartridge chip, and the space for installing the ink cartridge chip on the ink cartridge is also very small, a large battery cannot be installed on the ink cartridge chip. Therefore, the electric energy stored in the battery is limited, and the discharge time of the battery needs to be strictly controlled. The battery supplies the memory 50 with a DC voltage of 3.3V, which is VDD in FIG. 5 .

In this embodiment, the discharge of the battery is controlled by the field effect transistor T1 as the first switching device. The field effect transistor T1 is a high-level conducting field effect transistor, its drain is connected to the battery, and its source is connected to the memory 50 , and the gate as the control terminal is connected to the field effect transistor T2. As the second switching device of this embodiment, the field effect transistor T2 is a low-level conducting device, and the drain of the field effect transistor T2 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 the resistor R2.

The source of the field effect transistor T2 is connected to the capacitor C4. In this embodiment, the capacitor C4 is the second energy storage device, and the resistor R2 is the second energy consumption device. When the field effect transistor 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 as the third energy storage device, and is also connected to the resistor R1 as the first energy dissipation device, and a diode as the first diode is connected between the capacitor C3 and the capacitor C4 D1, 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.

In addition, the high voltage terminal 45 can supply power to the capacitor C3 through a diode D2 as a second diode, 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 , the resistor R3 is the third energy storage device charging control device, its function is to control the charging speed of the high-voltage terminal 45 when charging the capacitor C3, and form a voltage divider circuit together with the resistor R1 to avoid the voltage loaded on the capacitor C3 is too high As a result, capacitor C3 is broken down.

When the inkjet printer does not load a high-level signal to the high-voltage terminal 45, the high-voltage terminal 45 outputs a low-level signal, that is, no current flows through the diode D2. At this time, point A is in a low-level state, and due to the capacitor C3 and capacitor C4 It is not charged, and point B is also in a low level state, so the field effect transistor T2 is also in an off state, and point C is pulled down to a low level state by the resistor R2, so the field effect transistor T1 is in an off state, and the battery cannot transfer to the memory 50. powered by.

When the inkjet printer loads a high-voltage pulse signal to the high-voltage terminal 45, for example, the inkjet printer loads a high-voltage pulse signal to the high-voltage terminal 45 for a long period of time, the high-voltage pulse signal of the high-voltage terminal 45 passes through the diode D2 and the resistor R3. Charging, at this time, point A is in a high level state, and the gate of the field effect transistor T2 is in a high level and is in an off state. Since point A is in a high state, current will flow through diode D1 and charge capacitor C4, so the voltage at point B is also gradually increasing. However, after the capacitors C3 and C4 are fully charged, since the voltages at point A and point B only differ by the voltage drop VD of the diode D1, and VD<VGS, the field effect transistor T2 is still in the off state, and the current cannot pass through the field effect. The tube T2 flows to the resistor R2, the point C is still in a low level state, the field effect transistor T1 is still turned off, and the battery cannot supply power to the memory 50.

When the inkjet printer is powered on but does not enter the sleep mode, and does not need to write data to the memory 50 or read data from the memory 50, it will always load a high-voltage pulse signal to the high-voltage terminal 45 to detect ink cartridges of all colors Whether it is installed in place, and the high-voltage terminal 45 will transition to a low-level signal in advance when the inkjet printer is ready to communicate with the memory 50, and the duration from the transition to the low-level signal to the start of communication with the memory 50 is often only tens of milliseconds to hundreds of milliseconds.

During the time period when the high-voltage terminal 45 is loaded with the high-voltage pulse signal, although the capacitor C3 will discharge through the resistor R1 when the pulse signal is low, but due to the high speed of the pulse signal, the capacitor C3 will not be fully discharged before the next discharge. The high-level pulse signal is sent to C3 to continue charging. Therefore, although the level signal at point A changes, it is always in a high-level state. VA-VB<VGS, the FET T2 is turned off, and the FET T1 is turned off. The gate is also pulled down to a low level state by the resistor R2 all the time and is turned off, and the battery cannot discharge to the memory 50 .

During a period of time after the high-voltage pulse signal output by the high-voltage terminal 45 is converted into a low-level signal, since the capacitor C3 continues to discharge, the point A maintains a high-level state for a period of time. At this time, the capacitor C3 discharges through the resistor R1. During a period of time when the discharge starts, because VA-VB<VGS, the field effect transistor T2 remains in the cut-off state, and the capacitor C4 will not discharge. As the capacitor C3 continues to discharge, the voltage at point A will gradually decrease. When the difference between the voltage at point A and the voltage at point B reaches the opening threshold VGS of the field effect transistor T2, the field effect transistor T2 is turned on, and the capacitor C4 passes through the field effect transistor. T2 discharges to the resistor R2, at this time, a voltage is formed on the resistor R2, the point C is in a high level state, the field effect transistor T1 is turned on, and the battery supplies power to the memory 50.

Due to the limited power stored by capacitor C4, the capacitor C4 will be discharged after a period of time, and the high level state of point C can only be maintained for a short time, such as only one or two seconds. Therefore, the FET T1 The on-time can only be maintained for a short time. Since the communication between the inkjet printer and the memory 50 is usually completed in a very short time, the on-time of the FET T1 can meet the needs of the inkjet printer to read and write data to the memory 50 .

When the capacitor C4 is discharged, the point C becomes a low level state, the field effect transistor T1 returns to the off state again, and the battery cannot supply power to the memory 50, thereby preventing the battery from supplying power to the memory 50 for a long time and causing the battery's power to be too fast. After the consumption is completed, ensure that the electric energy of the battery can be used for a long time. The length of time that the battery discharges to the storage 50 each time depends on the length of the discharge time of the capacitor C4. Therefore, a capacitor C4 with a suitable capacity and a resistor R2 with a suitable resistance value can be set according to actual requirements to meet the discharge requirements of the storage battery 50.

It can be seen that if the high-voltage terminal 45 is in a low-level state for a long time, or is in a high-level state for a long time, the field effect transistors T1 are all turned off, and only in a very short time when the high-voltage terminal is loaded with a high level and converted to a low level , the field effect transistor T1 will be turned on, and the battery will supply power to the memory 50, which can prevent the battery from being consumed too quickly and ensure that the ink cartridge chip can be used for a long time.

In this embodiment, the power used by the memory 50 is provided by a battery, so it is not necessary to set a power supply terminal on the substrate 40 that receives the DC voltage output by the inkjet printer and is directly used to provide power to the memory 50, therefore, no There is a problem that the memory 50 is damaged due to the excessively high voltage being applied to the power supply terminals.

It should be noted that, in the above embodiments, a battery is used as the first energy storage device. In practical application, a rechargeable battery or a Farad capacitor can be used as the first energy storage device.

Since the ink cartridge chip of the first embodiment needs to be powered by a battery, usually, the battery is installed in a battery cartridge, but since the printing carriage will drive the ink cartridge to move together during the printing process, vibration is prone to occur, resulting in the battery being easily removed from the clamp. If the box falls off or is in poor contact with the electrical contacts of the battery, the battery cannot supply power to the memory, or the power supply to the memory is poor, causing the memory to not work properly, which in turn affects the normal operation of the ink cartridge and even the inkjet printer. Therefore, the present invention further improves the ink cartridge chip of the first embodiment.

The second embodiment of the ink cartridge chip:

The ink cartridge chip of this embodiment has a substrate, one side of the substrate is provided with a plurality of connection terminals, the plurality of connection terminals are arranged in two rows, including four first connection terminals connected to the memory, two detection terminals and two high-voltage terminals , the arrangement of the plurality of connection terminals is the same as that of the first embodiment, and will not be repeated.

Referring to FIG. 6 , the battery as the first energy storage device in this embodiment supplies power to the storage 70 . Preferably, the battery is a non-rechargeable battery, that is, after being packaged in the ink cartridge chip, it cannot be charged but can only be discharged. Due to the small area of the ink cartridge chip, and the space for installing the ink cartridge chip on the ink cartridge is also very small, a large battery cannot be installed on the ink cartridge chip. Therefore, the electric energy stored in the battery is limited, and the discharge time of the battery needs to be strictly controlled.

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

The source of the field effect transistor T12 is connected to the capacitor C13, and the resistor R13 is an energy dissipation device. When the field effect transistor T12 is turned on, the capacitor C13 can discharge to the resistor R13. The gate of the field effect transistor T12 is connected to the capacitor C14, and is also connected to the resistor R12 as an energy dissipation device, and a diode D12 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 of the diode D12 is connected. The terminal is connected to capacitor C13.

In addition, the high voltage terminal 45 can supply power to the capacitor C14 through the diode D13, the anode terminal of the diode D13 is connected to the high voltage terminal 45, the cathode terminal is connected to one end of the resistor R14, the other end of the resistor R14 is connected to the resistor R12, and the function of the resistor R14 is to control The charging speed of the high-voltage terminal 45 when charging the capacitor C14, together with the resistor R12, forms a voltage divider circuit to prevent the capacitor C14 from being broken down due to excessive voltage loaded on the capacitor C14.

In addition, this embodiment also provides a high-voltage drive circuit. The high-voltage drive circuit includes a resistor R11, a capacitor C12 as a fourth energy storage device, and a diode D11 as a third diode. The high-voltage terminal 45 charges the capacitor C12 through the resistor R11, and the diode The anode terminal of D11 is connected to the resistor R11 , and the cathode terminal supplies power to the memory 70 . In this way, when the high-voltage terminal 45 receives the high-voltage signal, the capacitor C12 is charged through the resistor R11, and power is supplied to the memory 70 through the diode D11.

By setting the resistor R11 with a suitable resistance value, the voltage loaded to the memory 70 can be the rated working voltage, so as to prevent the memory 70 from being damaged due to excessive voltage. On the other hand, since the capacitor C12 has the functions of energy storage, filtering and voltage regulation, it avoids the occurrence of spikes or instantaneous changes in the voltage loaded to the memory 70 .

When the inkjet printer does not load a high-voltage signal to the high-voltage terminal 45, the high-voltage terminal 45 outputs a low-level signal, that is, no current flows through the diode D13. At this time, the point A1 is in a low-level state, and the capacitor C14 and capacitor C13 are not After being charged, the B1 point is in the low level state, so the FET T12 is also in the off state, and the C1 point is pulled down to the low level state by the resistor R13, so the FET T11 is in the off state, and the battery cannot supply power to the memory 70. Also, since no current flows through the diode D11, the high-voltage driving circuit does not supply power to the memory 70 either. When the inkjet printer loads the high voltage pulse signal to the high voltage terminal 45, for example, the inkjet printer loads the high voltage pulse signal to the high voltage terminal 45 for a long period of time, the pulse signal of the high voltage terminal 45 passes through the diode D13 and the resistor R14, and then charges the capacitor C14. , at this time, the A1 point is in a high level state, and the gate of the field effect transistor T12 is in a high level and is in an off state. Since the A1 point is in a high state, the current will flow through the diode D12 and charge the capacitor C13, so the voltage at the B1 point is also gradually increasing. However, after the capacitor C13 and the capacitor C14 are fully charged, since the voltage between the A1 point and the B1 point only differs by the voltage drop VD of the diode D12, and VD<VGS, the FET T12 is still in the off state, and the current cannot pass through the field. The effect transistor T12 flows to the resistor R13, the point C1 is still in a low level state, the field effect transistor T11 is still turned off, and the battery cannot supply power to the memory 70.

At the same time, the high voltage terminal 45 charges the capacitor C12 through the resistor R11. Since the voltage of the capacitor C12 cannot change abruptly, the voltage loaded into the memory 70 rises slowly. In addition, due to the existence of the resistor R11, the voltage loaded into the memory 70 will not be too high to cause the memory 70 to be damaged.

When the inkjet printer is powered on but does not enter the sleep mode, and does not need to write data to the memory 70 or read data from the memory 70, it will always load a high-voltage pulse signal to the high-voltage terminal 45 to detect ink cartridges of all colors Is it installed in place, and the high-voltage terminal 45 will transition to a low-level signal in advance when the inkjet printer is ready to communicate with the memory 70, and the duration from the transition to the low-level signal to the start of communication with the memory 70 is often only tens of milliseconds to hundreds of milliseconds.

During the time period when the high-voltage terminal 45 is loaded with the high-voltage pulse signal, although the capacitor C14 will discharge through the resistor R12 when the pulse signal is low, but due to the high speed of the pulse signal, the capacitor C14 will not be fully discharged before the next discharge. The high-level pulse signal is sent to C14 to continue charging. Therefore, although the level signal at point A1 changes, it is always in a high-level state. VA1-VB1<VGS, the FET T12 is turned off, and the FET T11 is in the high-level state. The gate is also pulled down by the resistor R13 to a low level state and turned off, and the battery cannot discharge to the memory 70 .

During a period of time after the high-voltage pulse signal output by the high-voltage terminal 45 is converted into a low-level signal, since the capacitor C14 continues to discharge, the point A1 maintains a high-level state for a period of time. At this time, the capacitor C14 discharges through the resistor R12. During a period of time when the discharge starts, because VA1-VB1<VGS, the field effect transistor T12 remains in the cut-off state, and the capacitor C13 will not discharge. As the capacitor C14 continues to discharge, the voltage at point A1 will gradually decrease. When the difference between the voltage at point A1 and the voltage at point B1 reaches the opening threshold VGS of the FET T2, the FET T12 is turned on, and the capacitor C13 passes through the FET. T12 discharges to the resistor R13, at this time, a voltage is formed on the resistor R13, the point C1 is a high level signal, the field effect transistor T11 is turned on, and the battery supplies power to the memory 70.

Because the power stored by capacitor C13 is limited, the capacitor C13 will be discharged after a period of time, and the high level state of point C1 can only be maintained for a short time, such as only one or two seconds. Therefore, the FET T11 The on-time can only be maintained for a short time. Since the communication between the inkjet printer and the memory 70 is usually completed in a very short time, the on-time of the FET T11 can meet the needs of the inkjet printer to read and write data to the memory 70 .

When the capacitor C13 is discharged, the C1 point becomes a low level state, the FET T11 returns to the off state again, and the battery cannot supply power to the memory 70, so as to prevent the battery from supplying power to the memory 70 for a long time. After the consumption is completed, ensure that the electric energy of the battery can be used for a long time. The length of time that the battery discharges to the storage 70 each time depends on the length of the discharge time of the capacitor C13. Therefore, a capacitor C13 of suitable capacity and a resistor R13 of suitable resistance can be set according to actual needs to meet the discharge requirements of the storage battery to the storage 70.

Similarly, when the high-voltage terminal 45 receives a high-voltage signal in a short time, the high-voltage driving circuit also supplies power to the memory 70 in a short time to ensure the operation of the memory 70 .

It can be seen that if the high-voltage terminal 45 is in a low-level state for a long time, or is in a high-level state for a long time, the field effect transistor T11 is turned off, and only in a very short time when the high-voltage terminal is loaded with a high level and converted to a low level , the field effect transistor T11 will be turned on, and the battery will supply power to the memory 70, which can prevent the battery from being consumed too quickly and ensure that the ink cartridge chip can be used for a long time.

In this embodiment, the condition for the memory 70 to obtain electric power is that the high-voltage terminal 45 receives a high-voltage signal. Therefore, the memory 70 can be understood as a device that is driven to work when the inkjet printer outputs a high-voltage signal to the high-voltage terminal 45 , that is, the memory 70 The work is based on high voltage signals.

In addition, the memory 70 of this embodiment adopts two different power supply modes. Even if the battery box of the battery is loose and the battery cannot supply power to the memory 70, a high-voltage drive circuit can be used to supplement the power supply, which can ensure the stable power supply of the memory 70 and ensure the memory 70 works fine.

The third embodiment of the ink cartridge chip:

Referring to FIG. 7 , a high-voltage drive circuit is provided in this embodiment. The high-voltage drive circuit includes a resistor R21, a capacitor C21 and a diode D21. The high-voltage terminal 45 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 is connected to the resistor R21. The memory 70 is powered. In this way, when the high-voltage terminal 45 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 conducting FET, its drain is connected to the cathode terminal of the diode D21 , its source is connected to the memory 70 , and its gate serving as a control terminal is connected to the FET T22 . As the second switching device of this embodiment, the field effect transistor T22 is a low-level conducting device, and the drain of the field effect transistor T22 is connected to the gate of the field effect transistor T21. In addition, the drain of the field effect transistor T22 is also connected to the resistor R23.

The source of the field effect transistor T22 is connected to the capacitor C23. When the field effect transistor T22 is turned on, the capacitor C23 can discharge to the resistor R23. The gate of the FET T22 is connected to the capacitor C24 and also 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 .

In addition, the high voltage terminal 45 can supply power to the capacitor C24 through the diode D23, the anode terminal of the diode D23 is connected to the high voltage terminal 45, the cathode terminal is connected to one end of the resistor R24, the other end of the resistor R24 is connected to the resistor R22, and the function of the resistor R24 is to control The charging speed of the high-voltage terminal 45 to the capacitor C24, together with the resistor R22, forms a voltage divider circuit, which prevents the capacitor C24 from being broken down due to excessive voltage loaded on the capacitor C24.

When the inkjet printer does not load a high-voltage signal to the high-voltage terminal 45, the high-voltage terminal 45 outputs a low-level signal, that is, the diode D23 has no current passing through it. After being charged, the B2 point is in the low level state, so the FET T2 is also in the off state, and the C2 point is pulled down to the low level state by the resistor R2, so the FET T21 is in the off state, and the high voltage drive circuit cannot supply power to the memory 70 .

When the inkjet printer loads a high-voltage pulse signal to the high-voltage terminal 45, for example, the ink-jet printer loads a high-voltage pulse signal to the high-voltage terminal 45 for a long period of time, the high-voltage pulse signal of the high-voltage terminal 45 passes through the diode D23 and the resistor R24. When charging, at this time, the A2 point is a high level signal, and the gate of the field effect transistor T22 is a high level and is in an off state. Since the A2 point is in the high state, the current will flow through the diode D22 and charge the capacitor C23, so the voltage of the B2 point is also gradually increasing. However, after the capacitor C23 and the capacitor C24 are fully charged, since the voltage between points A2 and B2 only differs by a voltage drop VD of the diode D22, and VD<VGS, the field effect transistor T22 is still in the off state, and the current cannot pass through the field effect. The tube T22 flows to the resistor R23, the point C2 is still in a low level state, the field effect transistor T21 is still turned off, and the high-voltage driving circuit still cannot supply power to the memory 70.

During the time period when the high-voltage terminal 45 is loaded with the high-voltage pulse signal, although the capacitor C24 will discharge through the resistor R22 when the pulse signal is low, but due to the high speed of the pulse signal, the capacitor C24 will not be fully discharged before the next discharge. The high-level pulse signal is sent to C24 to continue charging. Therefore, although the level signal at point A2 changes, it is always in a high-level state. VA2-VB2<VGS, the FET T22 is turned off, and the FET T21 is in the high-level state. The gate is also pulled down by the resistor R23 to a low level state and turned off, and the battery cannot discharge to the memory 70 .

During a period of time after the high-voltage pulse signal output by the high-voltage terminal 45 is converted into a low-level signal, since the capacitor C24 continues to discharge, the point A2 maintains a high-level state for a period of time. At this time, the capacitor C24 discharges through the resistor R22. During a period of time when the discharge starts, because VA2-VB2<VGS, the field effect transistor T22 remains in the cut-off state, and the capacitor C23 will not discharge. As the capacitor C24 continues to discharge, the voltage at point A2 will gradually decrease. When the difference between the voltage at point A2 and the voltage at point B2 reaches the opening threshold VGS of the FET T22, the FET T22 is turned on, and the capacitor C23 passes through the FET. T22 discharges to the resistor R23, at this time, a voltage is formed on the resistor R23, the point C2 is a high-level signal, the field effect transistor T21 is turned on, and the high-voltage drive circuit supplies power to the memory 70, that is, the energy stored in the capacitor C21 is used to supply power to the memory 70 .

Since the communication between the inkjet printer and the memory 70 is usually completed in a very short time, the on-time of the FET T21 can meet the needs of the inkjet printer to read and write data to the memory 70 . After the capacitor C23 is discharged, the point C2 becomes a low level signal, the field effect transistor 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, it is not necessary to supply power to the memory 70 through the battery, and the electrical energy required by the memory 70 comes entirely from the high-voltage signal received by the high-voltage terminal 45 . Therefore, there is no reason that the memory 70 cannot be powered by the battery. The problem of not working properly, and the ink cartridge chip does not need to be provided with a battery, and the production cost is lower. In addition, since the electrical energy used by the memory 70 comes entirely from the high-voltage signal received by the high-voltage terminal 45 , the memory 70 can be understood as a device driven to work when the inkjet printer outputs the high-voltage signal to the high-voltage terminal 45 , that is, the memory 70 The work is realized based on high-voltage signals, and there is no need to set a low-voltage power supply on the ink cartridge chip.

In addition, when the high voltage terminal 45 receives a high voltage signal for a long time, the field effect transistor T21 is in an off state, which can prevent the memory 70 from being damaged by receiving an excessively high voltage.

The fourth embodiment of the ink cartridge chip:

Referring to FIG. 8 , the battery as the first energy storage device in this embodiment supplies power to the storage 70 . Preferably, the battery is a non-rechargeable battery, that is, after being packaged in the ink cartridge chip, it cannot be charged but can only be discharged. Due to the small area of the ink cartridge chip, and the space for installing the ink cartridge chip on the ink cartridge is also very small, a large battery cannot be installed on the ink cartridge chip. Therefore, the electric energy stored in the battery is limited, and the discharge time of the battery needs to be strictly controlled.

In this embodiment, the discharge of the battery is controlled by the field effect transistor T31 as the first switching device. The field effect transistor T31 is a high-level conducting field effect transistor, its drain is connected to the battery, and its source is connected to the memory 70 , and the gate as the control terminal is connected to the field effect transistor T32. As the second switching device of this embodiment, the field effect transistor T32 is a low-level conducting device, and the drain of the field effect transistor T32 is connected to the gate of the field effect transistor T31. In addition, the drain of the FET T32 is also connected to the resistor R33.

The source of the field effect transistor T32 is connected to the capacitor C33, and the resistor R33 is an energy-consuming device. When the field effect transistor T32 is turned on, the capacitor C33 can discharge to the resistor R33. The gate of the field effect transistor T32 is connected to the capacitor C34, and is also connected to the resistor R35 as an energy dissipation device, and a diode D32 is connected between the capacitor C33 and the capacitor C34, the anode end of the diode D32 is connected to the capacitor C34, and the cathode of the diode D32 is connected. The terminal is connected to capacitor C33.

In addition, the high voltage terminal 45 can supply power to the capacitor C34 through the resistor R34 and the diode D33. One end of the resistor R34 is connected to the high voltage terminal 45, the other end is connected to the anode of the diode D33, the cathode of the diode D33 is connected to the capacitor C34, and the resistor R34 is used as the first The three energy storage device charging control device is used to control the charging speed of the high voltage terminal 45 when charging the capacitor C34, and form a voltage divider circuit together with the resistor R32 to prevent the capacitor C34 from being broken down due to excessive voltage loaded on the capacitor C34. .

In addition, this embodiment also provides a high-voltage drive circuit. The high-voltage drive circuit includes a resistor R31, a capacitor C32 as a fourth energy storage device, and a diode D31 as a third diode. The high-voltage terminal 45 charges the capacitor C32 through the resistor R31, and the diode The anode terminal of D31 is connected to resistor R31 and the cathode terminal supplies power to the memory 70 . In this way, when the high voltage terminal 45 receives the high voltage signal, the capacitor C32 is charged through the resistor R31, and the memory 70 is supplied with power through the diode D31.

By setting the resistor R31 with a suitable resistance value, the voltage loaded to the memory 70 can be made the rated working voltage, so as to prevent the memory 70 from being damaged due to excessive voltage. On the other hand, since the capacitor C32 has the functions of energy storage, filtering and voltage regulation, it avoids the occurrence of spikes or instantaneous changes in the voltage loaded into the memory 70 .

When the inkjet printer does not load a high-voltage signal to the high-voltage terminal 45, the high-voltage terminal 45 outputs a low-level signal, that is, no current flows through the diode D33. At this time, the point A3 is in a low-level state, and since the capacitor C34 and capacitor C33 are not After being charged, point B3 is in the low level state, so the FET T32 is also in the off state, and the point C3 is pulled down to the low level state by the resistor R33, so the FET T31 is in the off state, and the battery cannot supply power to the memory 70. Also, since no current flows through the diode D31, the high-voltage driving circuit does not supply power to the memory 70 either.

When the inkjet printer loads the high voltage pulse signal to the high voltage terminal 45, for example, the inkjet printer loads the high voltage pulse signal to the high voltage terminal 45 for a long period of time, the pulse signal of the high voltage terminal 45 will charge the capacitor C34 after passing through the diode D33 and the resistor R34. , at this time, the A3 point is in a high level state, and the gate of the field effect transistor T32 is in a high level and is in an off state. Since the A3 point is in a high state, the current will flow through the diode D32 and charge the capacitor C33, so the voltage at the B3 point is also gradually increasing. However, after the capacitor C33 and the capacitor C34 are fully charged, since the voltages at points A3 and B3 only differ by the voltage drop VD of the diode D32, and VD<VGS, the FET T32 is still in the off state, and the current cannot pass through the field. The effect transistor T32 flows to the resistor R33, the point C3 is still in a low level state, the field effect transistor T31 is still turned off, and the battery cannot supply power to the memory 70.

At the same time, the high voltage terminal 45 charges the capacitor C32 through the resistor R31. Since the voltage of the capacitor C32 cannot change abruptly, the voltage loaded into the memory 70 rises slowly. In addition, due to the existence of the resistor R31, the voltage loaded into the memory 70 will not be too high to cause the memory 70 to be damaged.

During the time period when the high-voltage terminal 45 is loaded with the high-voltage pulse signal, although the capacitor C34 will discharge through the resistor R35 when the pulse signal is low, but due to the high speed of the pulse signal, the capacitor C34 will not be fully discharged before the next discharge. The high-level pulse signal is sent to C34 to continue charging. Therefore, although the level signal of point A3 changes, it is always in a high-level state. VA3-VB3<VGS, the FET T32 is turned off, and the FET T31 is in the high-level state. The gate is also pulled down by the resistor R33 to a low level state and turned off, and the battery cannot discharge to the memory 70 .

During a period of time after the high-voltage pulse signal output by the high-voltage terminal 45 is converted into a low-level signal, since the capacitor C34 continues to discharge, the point A3 maintains a high-level state for a period of time. At this time, the capacitor C34 discharges through the resistor R35. During a period of time when the discharge starts, because VA3-VB3<VGS, the field effect transistor T32 is still in the cut-off state, and the capacitor C33 will not discharge. As the capacitor C34 continues to discharge, the voltage at point A3 will gradually decrease. When the difference between the voltage at point A3 and the voltage at point B3 reaches the opening threshold VGS of the FET T2, the FET T32 is turned on, and the capacitor C33 passes through the FET. T32 discharges to the resistor R33, at this time, a voltage is formed on the resistor R33, the point C3 is a high level signal, the field effect transistor T31 is turned on, and the battery supplies power to the memory 70.

Since the power stored by capacitor C33 is limited, the capacitor C33 will be discharged after a period of time, and the high level state of point C3 can only be maintained for a short time, for example, only for one or two seconds. Therefore, the FET T31 The on-time can only be maintained for a short time. Since the communication between the inkjet printer and the memory 70 is usually completed in a very short time, the on-time of the FET T31 can meet the needs of the inkjet printer to read and write data to the memory 70 .

When the capacitor C33 is discharged, the C3 point becomes a low level state, the FET T31 returns to the off state again, and the battery cannot supply power to the memory 70, thereby preventing the battery from supplying power to the memory 70 for a long time. After the consumption is completed, ensure that the electric energy of the battery can be used for a long time. The length of time that the battery discharges to the memory 70 each time depends on the length of the discharge time of the capacitor C33. Therefore, a capacitor C33 with a suitable capacity and a resistor R33 with a suitable resistance value can be set according to actual needs to meet the discharge requirements of the battery to the memory 70.

It can be seen that if the high-voltage terminal 45 is in a low-level state for a long time, or is in a high-level state for a long time, the field effect transistor T31 is turned off, and only in a very short time when the high-voltage terminal is loaded with a high level and converted to a low level , the field effect transistor T31 will be turned on, and the battery will supply power to the memory 70, which can prevent the battery from being consumed too quickly and ensure that the ink cartridge chip can be used for a long time.

In practical applications, the researchers found that some models of inkjet printers were woken up in the sleep state, before preparing to communicate with the memory 70, for example, the user sent a printing task to the inkjet printer when it was in the sleep state, and the inkjet printer woke up Afterwards, only a very short period of high-voltage pulse signal is loaded to the high-voltage terminal 45 to start communication with the memory 70. For example, only N (N<5) high-voltage pulse signals are loaded, and the high-level state of each high-voltage pulse signal only lasts. hundreds of microseconds. In this case, if the circuit of the second embodiment is still used, due to the short charging time, after the inkjet printer stops applying the high-voltage pulse signal to the high-voltage terminal 45, the capacitor C34 and the capacitor C33 are not fully charged, resulting in A3 The voltage difference between the point and point B3 is always smaller than the threshold voltage VGS of the FET T22, the FET T22 is always in the cut-off state, which also causes the point C3 to always be in a low level state, and the FET T31 cannot be turned on. The battery cannot power the memory 70 . Or the voltage difference of VA3-VB3 is greater than the threshold voltage VGS of FET T22 in a very short period of time, and the FET T22 is also turned on for a very short period of time, but because the capacitor C33 is far from being fully charged, After the FET T22 is turned on, the capacitor C33 starts to discharge through the resistor R33, but after a short time of discharge, the voltage difference between the points A3 and B3 will be less than the threshold voltage VGS of the FET T22, the field effect The tube T22 is turned off, the point C3 is pulled back to a low level state by the resistor R33, and the FET T31 is turned off after being turned on for a very short period of time, which cannot meet the needs of the memory 70 to work. At the same time, due to the extremely short charging time, the capacitor C32 of the high-voltage driving circuit is far from being fully charged, and cannot provide the memory 70 with power required for operation. Therefore, if the circuit of the second embodiment continues to be used, the memory 70 may work abnormally on some models of inkjet printers.

Therefore, this embodiment improves the circuit of the second embodiment. Compared with the second embodiment, the main difference of this embodiment is that the first energy dissipation resistor R35 for discharging the capacitor C34 is added. The function of the resistor R32 is to It forms a charging voltage divider circuit with R34, which no longer discharges the capacitor C34; at the same time, the diode D33 is set between the resistor R32 and the capacitor C34 to prevent the capacitor C34 from passing through the capacitor C34 when the high voltage terminal 45 becomes low. Resistor R32 discharges.

Considering the charging speed and charging voltage of the high voltage terminal 45 to the capacitor C34, the resistance values of the charging speed control resistor R34 and the voltage dividing resistor R32 must be moderate. , the capacitor C34 and the capacitor C33 must be fully charged as soon as possible, and the discharge time of the capacitor C34 and the capacitor C33 must remain unchanged. Therefore, the capacities of the capacitor C34 and the capacitor C33 in this embodiment are much smaller than those of the capacitor C14 and the capacitor C13 in the second embodiment, and the energy dissipation resistor R35 for discharging the capacitor C34 and the energy dissipation resistor for discharging the capacitor C33 The resistance value of R33 is much larger than that of the resistor R12 and the resistor R13 in the second embodiment.

Examples of cartridges:

This embodiment has a casing, the casing encloses a cavity for accommodating ink, an ink outlet communicated with the cavity is provided below the cavity, and the ink in the cavity can flow out through the ink outlet. Moreover, an ink cartridge chip according to the above-mentioned embodiment of the present invention is detachably mounted on an outer wall of the casing.

Examples of inkjet printers:

The inkjet printer of this embodiment is provided with an organic body, and an accommodating cavity for accommodating the ink cartridge is formed in the body.

Finally, it should be emphasized that the present invention is not limited to the above-mentioned embodiments, and the switching devices used are not necessarily FETs, but triodes can be used instead of FETs, and these changes should also be included in the protection scope of the claims of the present invention.

Industrial Applicability

The ink cartridge chip of the present invention can be installed on the side wall of the ink cartridge, the ink cartridge can be installed on the inkjet printer, and the first switch device and the second switch device can be arranged to avoid damage to the memory caused by the high voltage output by the high voltage terminal.

Claims

Cartridge chips, including:

a substrate, the substrate is provided with a memory and a plurality of connection terminals, 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;

It is characterized by:

A first energy storage device is arranged on the substrate, and the first energy storage device supplies power to the memory through a first switching device, and the first switching device outputs a high-level signal at the high-voltage terminal and converts it into a low-voltage It is turned on within a first preset time after the high-level signal, and turned off within a second preset time when the high-level signal output by the high-voltage terminal is converted into a low-level signal.
ink cartridge chip according to claim 1, is characterized in that:

On-off of the first switching device is controlled by a second switching device, the second switching device is connected between the second energy storage device and the control end of the first switching device, and the control end of the second switching device A third energy storage device is connected.
The ink cartridge chip according to claim 2, wherein:

A first diode is connected between the third energy storage device and the second energy storage device, an anode end of the first diode is connected to the third energy storage device, and the first and second energy storage devices are connected to each other. The cathode end of the pole tube is connected to the second energy storage device.
The ink cartridge chip according to claim 2 or 3, characterized in that:

The third energy storage device is connected with a first energy consumption device and a third energy storage device charging control device.
ink cartridge chip according to claim 4, is characterized in that:

A second diode is connected between the high voltage terminal and the third energy storage device charging control device, the high voltage terminal is connected to the anode end of the second diode, and the cathode end of the second diode connected to the third energy storage device charging control device.
The ink cartridge chip according to claim 2 or 3, characterized in that:

The third energy storage device is connected with a first energy consumption device and a second diode, and the second diode is also connected with a third energy storage device charging control device.
ink cartridge chip according to claim 6, is characterized in that:

A second diode is connected between the third energy storage device charging control device and the third energy storage device, the high voltage terminal is connected to one end of the third energy storage device charging control device, and the third energy storage device is connected to one end of the charging control device. The other end of the three energy storage device charging control device is connected to the anode end of the second diode, and the cathode end of the second diode is connected to the third energy storage device.
The ink cartridge chip according to claim 2 or 3, characterized in that:

The second switching device is further connected with a second energy consumption device, and the second energy storage device discharges to the second energy consumption device through the second switching device.
The ink cartridge chip according to claim 2 or 3, characterized in that:

The first switching device is a high-level conducting device, and the second switching device is a low-level conducting device.
Cartridge chips, including:

a substrate, the substrate is provided with a memory and a plurality of connection terminals, 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;

It is characterized by:

A first energy storage device is provided on the substrate, and the first energy storage device supplies power to the memory through a first switching device, and the first switching device is controlled on and off by a second switching device;

A high-voltage driving circuit is further provided on the substrate, and the high-voltage driving circuit receives a high-voltage signal from at least one of the high-voltage terminals, and supplies power to the memory.
The ink cartridge chip according to claim 10, wherein:

The high voltage drive circuit includes a resistor connected between the high voltage terminal and the memory.
The ink cartridge chip according to claim 11, wherein:

The high-voltage driving circuit further includes a third diode, an anode terminal of the third diode is connected to the resistor, and a cathode terminal of the third diode is connected to the memory.
The ink cartridge chip according to claim 12, wherein:

The high-voltage driving circuit further includes a fourth energy storage device, and one end of the fourth energy storage device is connected to the resistor and the anode end of the third diode.
Cartridge chips, including:

a substrate, the substrate is provided with a memory and a plurality of connection terminals, 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;

It is characterized by:

A high-voltage driving circuit is further provided on the substrate, the high-voltage driving circuit receives a high-voltage signal from at least one of the high-voltage terminals, and supplies power to the memory, wherein the high-voltage driving circuit supplies the memory to the memory through a first switching device Power is supplied, and the first switching device is controlled on and off by the second switching device.
Ink cartridges, including:

a box body, the box body encloses an accommodating cavity;

It is characterized by:

The ink cartridge chip according to any one of claims 1 to 14 is arranged on the outer wall of the box body.
The inkjet printer is characterized by comprising a body in which the ink cartridge according to claim 14 is installed.