CN2902705Y

CN2902705Y - Ink box chip

Info

Publication number: CN2902705Y
Application number: CN 200620060165
Authority: CN
Inventors: 林东宁; 张强
Original assignee: Print Rite Technology Development Co Ltd of Zhuhai
Current assignee: Print Rite Technology Development Co Ltd of Zhuhai
Priority date: 2006-06-07
Filing date: 2006-06-07
Publication date: 2007-05-23
Anticipated expiration: 2016-06-07

Abstract

The utility model relates to an ink box chip, including an electric contact, MCU, an oscillation resistance R1, an oscillation resistance R2, an oscillation capacitance C1, a transistor Q1, as well as a Zener diode D1. One end of the oscillation resistance R1 is connected with the VCC end of the MCU; the other end is connected with the oscillation crus PB3 of the MCU. The oscillation capacitance C1 is connected between the other end of the oscillation resistance R1 and the ground. The transistor Q1 is parallel connected with the oscillation resistance R1, after series connecting with the oscillation resistance R2. Cathode of the Zener diode D1 is connected to the base electrode of the transistor Q1, anode connected to the ground. The utility model could automatically switch to the high speed high power state or low speed low power state according to the voltage level provided by the ink jet printer.

Description

Ink box chip

Technical field

The utility model relates to a kind of chip that is exclusively used in the information of transmitting with ink-jet printer on the print cartridge that is installed in.

Background technology

Mostly install on the print cartridge and can carry out the chip that signal transmits and has information storage function with ink-jet printer, thereby make ink-jet printer can read the information that is stored in the ink box chip, for example, the type information that ink-jet printer can read from ink box chip corresponding to print cartridge compares identification, can also write the relevant information of reflection print cartridge state in the ink box chip.Therefore, if when being installed to a dissimilar print cartridge on the ink-jet printer mistakenly, ink-jet printer can detect this print cartridge and be installed mistakenly, and provides the prompting of setup error.In addition, the quantity that ink-jet printer can have been printed according to this print cartridge, the use history of print cartridge is written in the ink box chip, make the producer can from the ink box chip that the user returns, read the relevant historical information of using, thus, can carry out inspection, unit replacement work in the regeneration processing exactly, increase work efficiency.

Fig. 1 has disclosed a kind of internal circuit connection layout of existing ink box chip 1.It comprises the electric contact a that is electrically connected with the ink-jet printer chip contacts, b, c, d and e, with electric contact a, b, c, the MCU that d is connected with e (microcontroller) 2, oscillation resistance R1 and oscillating capacitance C1, electric contact a links to each other with the voltage end of inkjet printing machine chip, electric contact b links to each other with the ground end of inkjet printing machine chip, electric contact c, d links to each other with the FPDP of inkjet printing machine chip with e, the VCC end of MCU2 links to each other with electric contact a, the GND end links to each other with electric contact b, the end of oscillation resistance R1 links to each other with the VCC of MCU2 end, the other end links to each other with the PB3 end of MCU2, and oscillating capacitance C1 is connected between the other end and ground of oscillation resistance R1.When ink box chip 1 and inkjet printing machine chip electrically conducting, oscillation resistance R1, oscillating capacitance C1 produce operating frequency with the internal oscillator circuit (not shown) of MCU2, and this operating frequency is offered MCU2.The size decision of oscillation resistance R1 and oscillating capacitance C1 offers the operating frequency size of MCU2, and when capacitance one timing of oscillating capacitance C1, the resistance size of the size of operating frequency and oscillation resistance R1 is inversely proportional to, that is, the big more operating frequency of resistance is more little.

Yet, because the resistance of oscillation resistance R1 is fixed, can't adjust the power consumption state of MCU2 automatically, promptly, because the resistance value of oscillation resistance R1 is fixed, therefore, oscillation resistance R1, oscillating capacitance C1 produces operating frequency with the internal oscillator circuit (not shown) of MCU2 and fixes, make the power consumption state of MCU2 not adjust automatically, when the voltage that provides when the inkjet printing machine chip was higher, MCU2 can not adjust to the high power consumption state of corresponding high speed, when the voltage that provides when the inkjet printing machine chip is low, MCU2 can not adjust to corresponding low speed low power consumpting state, thereby makes that ink box chip 1 can't operate as normal.

Therefore, real necessity that belongs to of ink box chip of a kind of power consumption state that can automatically switch is provided.

Summary of the invention

The purpose of this utility model provides a kind of ink box chip of the power consumption state that can automatically switch.

For achieving the above object, the ink box chip that the utility model relates to comprises the electric contact that is electrically connected with the ink-jet printer chip contacts, the MCU that is connected with electric contact, oscillation resistance R1, oscillating capacitance C1, transistor Q1, oscillation resistance R2, current-limiting resistance R3 and Zener diode D1, the end of oscillation resistance R1 links to each other with the voltage end VCC of MCU, the other end links to each other with the vibration pin PB3 of MCU, oscillating capacitance C1 is connected between the other end and ground of oscillation resistance R1, the emitter stage of transistor Q1 links to each other with the voltage end VCC of MCU, the colelctor electrode of transistor Q1 is with in parallel with oscillation resistance R1 again after oscillation resistance R2 is connected in series, the end of current-limiting resistance R3 links to each other with the base stage of transistor Q1, the other end links to each other with the negative pole of Zener diode D1, the plus earth of Zener diode D1.

Compared with the prior art, ink box chip provided by the utility model has increased a transistor Q1, an oscillation resistance R2 and a Zener diode D1, because transistor Q1 and Zener diode D1 can or end according to the height conducting of voltage, the resistance of the feasible external circuit that links to each other with the internal oscillator circuit of MCU2 reduces or increases, operating frequency correspondingly increases or reduces, and then causes the size automatic switchover duty of MCU2 according to operating frequency.

Description of drawings

Fig. 1 is the electrical schematic diagram of existing ink box chip;

Fig. 2 is the electrical schematic diagram of ink box chip described in the utility model.

Be described in further detail below in conjunction with embodiment and accompanying drawing thereof.

The specific embodiment

As shown in Figure 2, ink box chip 3 comprises the electric contact a that is electrically connected with the ink-jet printer chip contacts, b, c, d and e, with electric contact a, b, c, the MCU2 that d is connected with e, oscillation resistance R1, oscillating capacitance C1, transistor Q1, oscillation resistance R2, current-limiting resistance R3 and Zener diode D1, electric contact a links to each other with the voltage end of inkjet printing machine chip, electric contact b links to each other with the ground end of inkjet printing machine chip, electric contact c, d links to each other with the FPDP of inkjet printing machine chip with e, the VCC end of MCU2 links to each other with electric contact a, the GND end links to each other with electric contact b, the end of oscillation resistance R1 links to each other with the VCC of MCU2 end, the other end links to each other with the PB3 pin of MCU2, oscillating capacitance C1 is connected between the other end and ground of oscillation resistance R1, the emitter stage of transistor Q1 links to each other with the voltage end VCC of MCU2, the colelctor electrode of transistor Q1 is with in parallel with oscillation resistance R1 again after oscillation resistance R2 is connected in series, the end of current-limiting resistance R3 links to each other with the base stage of transistor Q1, the other end links to each other with the negative pole of Zener diode D1, the plus earth of Zener diode D1.

When ink-jet printer when ink box chip 3 provides low voltage, promptly, when the voltage that ink-jet printer provides is lower than the voltage sum of the base stage of the breakdown voltage of Zener diode D1 and transistor Q1 and emitter stage, Zener diode D1 is operated in reverse state, transistor Q1 is operated in cut-off state, at this moment, only oscillation resistance R1, oscillating capacitance C1 produce operating frequency with the internal oscillator circuit of MCU2, the operating frequency of the bigger generation of resistance is less, makes ink box chip 3 automatically switch to the low speed low power consumpting state; When ink-jet printer provides high voltage, promptly, when the voltage that ink-jet printer provides is higher than the voltage sum of the base stage of the breakdown voltage of Zener diode D1 and transistor Q1 and emitter stage, Zener diode D1 reverse breakdown, transistor Q1 is operated in conducting state, at this moment, oscillation resistance R1, oscillation resistance R2, oscillating capacitance C1 produces operating frequency with the internal oscillator circuit of MCU2, because oscillation resistance R1 is less with oscillation resistance R2 resistance in parallel, thereby make that the operating frequency that produces is higher, and make ink box chip 3 automatically switch to the high power consumption state of high speed

Obviously, because ink box chip 3 provided by the utility model has increased a transistor Q1, an oscillation resistance R2 and a Zener diode D1, because transistor Q1 and Zener diode D1 can or end according to the height conducting of voltage, the resistance of the feasible external circuit that links to each other with the internal oscillator circuit of MCU2 reduces or increases, operating frequency correspondingly increases or reduces, and then causes the size automatic switchover duty of MCU2 according to operating frequency.

For the professional and technical personnel, the utility model also exists the simple malformation of other.Therefore, the utility model is not limited to shown in above-mentioned detailed description and the embodiment with regard to its more wide form.In addition, just as appended technical scheme and equivalent limit, many distortion can also be arranged and do not depart from the aim of total invention.

Claims

1, ink box chip comprises

The electric contact that is electrically connected with the inkjet printing machine chip;

The MCU that is connected with electric contact;

Oscillation resistance (R1), the one end links to each other with the voltage end (VCC) of MCU, and the other end links to each other with the vibration pin (PB3) of MCU;

Oscillating capacitance (C1), it is connected between the other end and ground of oscillation resistance (R1);

It is characterized in that:

Described ink box chip further comprises:

Transistor (Q1), its emitter stage links to each other with the voltage end (VCC) of MCU;

Oscillation resistance (R2), its with the collector series connection of transistor (Q1) after in parallel with oscillation resistance (R1) again;

Current-limiting resistance (R3), the one end links to each other with the base stage of transistor (Q1);

Zener diode (D1), its negative pole links to each other plus earth with the other end of current-limiting resistance (R3).