KR101141291B1 - System for preventing loss output data of power interruption print - Google Patents

Abstract

PURPOSE: A printer output data missing prevention system is provided to increase data storage time by implementing low power consumption and reducing costs. CONSTITUTION: A non-power switching circuit(30) controls the supply of a general power which is applied to a power conversion circuit(40) from an SMPS(Switched Mode Power Supply)(10). If the supply of the general power is abnormally interrupted, the non-power switching circuit blocks the reverse current. A power-stop detecting module applies a recognition signal to a printer control module. A USB(Universal Serial Bus) current control module(50) applies USB power to a logic power control module(60).

Description

Printer output data loss prevention system in case of power failure {SYSTEM FOR PREVENTING LOSS OUTPUT DATA OF POWER INTERRUPTION PRINT}

The present invention relates to a system for preventing printer output data loss during a power failure, and more particularly, a work data holding circuit, a USB power control circuit using an existing Rocker switch even in a non-powered state, and a SMPS (switching mode power supply) reverse current during a power failure. The present invention relates to a technology for maintaining output data of a printer in case of a power failure by using a separate backup power supply device through a power down prevention circuit.

The Auto ID system uses a printer for label printing. Most printers for this purpose employ computer output printing. In addition, there is no prevention function due to data communication interruption when power loss occurs in an industrial printer.

Therefore, in order to prevent power loss in advance, an expensive uninterruptible power supply (UPS) must be provided. It replaces the function of the UPS and prevents power failure by using peripheral devices (such as a laptop). Implementing data retention and loss prevention by adding a backup battery inside the printer is a cost-effective complement.

Various research and development has been made in the industry in order to improve this problem, and a number of other than the Republic of Korea Patent Publication No. 2006-0084276 (data processing apparatus having a backup power supply) is disclosed.

1, a memory unit for storing data and a program for processing the data; A CPU that executes a stored program to perform data processing operations; And a backup power supply unit supplying backup power PB to the memory unit and the CPU to complete the data processing operation when the main power PS supplied to the memory unit and the CPU is interrupted during the data processing operation. .

As such, the method including the backup power supply unit may be extended to other industrial printers. For example, in case of mobile printer, if 8.4V falls to the standard low voltage when 4.2V battery is used for backup as well as basic 8.4V battery, printing operation is stopped and TPH (Thermal Printing Head) and motor drive system are stopped by 4.2V backup power. In addition, data storage and loss prevention are possible using the processor logic power supply.

However, the conventional uninterruptible power supply (UPS) is a method that maintains the AC power for a period of time and 24V power in case of power failure, the size of the battery is large and heavy, difficult to manufacture, and high cost to purchase When applied to industrial printers, the time required to maintain high power output such as TPH and motor is short, and the possibility of data loss is also great.

The present invention has been made to solve the above problems, by automatically supplying a replacement power (USB power or battery power) when a power failure occurs, it is not known that the output data of the printer is lost due to the power supply interruption The purpose is to prevent.

In addition, an object of the present invention is to provide a printer output data loss prevention system in case of power failure to improve the data retention time according to low power consumption of less than 5V / 200mA, while easy to implement the circuit.

In addition, by designing a circuit that operates as a power on / off switch even in a non-power (0V) state to be applied to the conventional UPS mass production of the present invention, by controlling the alternate power (USB power) to enter the power failure mode, the logic power is turned on / Off purpose is to control.

Also, by preventing the power down phenomenon due to reverse current caused by SMPS internal GND resistance during power failure, the SMPS potential is biased to GND instead of floating state, and is applied as backup power during power failure. Even if a certain time (10 minutes) after the purpose of improving the disadvantage that the power down phenomenon occurs.

In order to achieve the above technical problem, a system for preventing printer output data loss during a power failure according to a first embodiment of the present invention controls the supply of general power applied to a power switching circuit from a switching mode power supply device through on / off switching. A non-power switch control circuit that cuts off reverse current when the power supply from the switching mode power supply is abnormally interrupted (when a power failure occurs);
A power failure detection module for applying a power failure recognition signal automatically detected when the power failure is grounded between the switching mode power supply and the non-power switch control circuit to a printer control module;
A power switching circuit that receives general power from the switching mode power supply device and applies a USB power supplied from a notebook connected through a USB current control module to a logic power control module when a power failure occurs;
A USB current control module receiving USB power from the notebook and applying the USB power to the power switching circuit when a potential difference occurs in the power switching circuit due to a power failure;
A Logic power control module for supplying the general power or the USB power applied from the power switching circuit to a printer control module and a nonvolatile memory; And
The printer receives the USB data for the printer output from the notebook and performs printing. When the power failure detection signal is received from the power failure detection module, the printer stops printing and simultaneously stores the USB data in the nonvolatile memory. A module;
When the power failure occurs, the USB power is supplied from the notebook connected through the USB current control module to the power switching circuit according to a potential difference generated by stopping the power supply from the non-power switch control circuit to the power switching circuit. Characterized in that the power source.

In addition, the printer output data loss prevention system in case of power failure according to the second embodiment of the present invention, while controlling the supply of the general power applied to the power switching circuit from the switching mode power supply through the on / off switching, switching mode power A non-power switch control circuit that cuts off a reverse current when the supply of the general power supply from the supply device is abnormally interrupted (when a power failure occurs); A power failure detection module for applying a power failure recognition signal automatically detected when the power failure is grounded between the switching mode power supply and the non-power switch control circuit to the printer control module; A power switching circuit configured to receive general power from a switching mode power supply, and to apply a battery power supplied from a backup battery connected through a current limit circuit to a logic power control module when a power failure occurs; Logic power control module for supplying the general power or battery power supplied from the power switching circuit to the printer control module and the nonvolatile memory; A printer control module configured to perform printing by receiving USB data for outputting a printer from a PC and to stop printing when the power failure recognition signal is received from the power failure detection module and to store the USB data in a nonvolatile memory; And a current limit circuit provided between the power switching circuit and the backup battery, and applying a battery power to the power switching circuit when a potential difference occurs in the power switching circuit due to a power failure.

According to the present invention as described above, there are shortcomings such as high cost, difficulty of implementation with battery size, weight, and when applied to an industrial printer, a short time to maintain high power output such as TPH and motor, and the likelihood of data loss and In contrast, the printer output data loss prevention system in case of power failure, the circuit implementation is easy and the cost is reduced, and the data retention time due to low power consumption of less than 5V / 200mA is improved.

In addition, according to the present invention, it is used as a power on / off Rocker switch that is 24V Control in the SMPS power input state, but by improving the disadvantage of the conventional UPS that does not operate the Rocker switch control according to the 24V power supply is interrupted during power outage, The circuit design operates as a power on / off switch even in a non-powered (0V) state so that it can be applied to a UPS mass production product. It has the effect of turning on / off the logic power by controlling the alternative power (USB power) even when the power failure mode is entered.

In addition, according to the present invention, the power down phenomenon is prevented from occurring due to a reverse current due to the internal GND resistance of the SMPS during a power failure. Even if it is applied as backup power at the time, there is an effect of improving the disadvantage that the power down phenomenon occurs after a certain time (10 minutes).

1 is a block diagram showing a data processing apparatus having a conventional backup power supply unit.
2 is a block diagram showing a printer output data loss prevention system during power failure according to the first embodiment of the present invention.
Figure 3 is a block diagram showing a printer output data loss prevention system during power failure according to a second embodiment of the present invention.

Specific features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, terms and words used in the present specification and claims are to be interpreted in accordance with the technical idea of the present invention based on the principle that the inventor can properly define the concept of the term in order to explain his invention in the best way. It should be interpreted in terms of meaning and concept. It is to be noted that the detailed description of known functions and constructions related to the present invention is omitted when it is determined that the gist of the present invention may be unnecessarily blurred.

2 is a block diagram illustrating a system for preventing printer output data loss during a power failure according to a first embodiment of the present invention. As shown in FIG. 2, the system S of preventing loss of printer output data according to a first embodiment of the present invention includes a switching mode power supply (SMPS) 10 and a non-power switch control circuit. 20, including the power failure detection module 30, the power switching circuit 40, the USB current control module 50, the Logic power control module 60, the printer control module 70, and the nonvolatile memory 80. It is composed.

Specifically, the switching mode power supply device 10 supplies AC power (hereinafter referred to as 'general power') to the connected printer 1.

In addition, the non-power switch control circuit 20 controls the supply of the general power applied from the switching mode power supply 10 to the power switching circuit 40 through the on / off switching, switching mode power supply 10 If the power supply from the power supply is abnormally interrupted (hereinafter referred to as 'outage'), the reverse current is cut off.

In addition, the power failure detection module 30 is grounded between the switching mode power supply device 10 and the non-power switch control circuit 20, when a power failure occurs, the power failure detection signal automatically detected by the printer control module 70 Is authorized.

In addition, the power failure detection module 30 applies a power resume recognition signal automatically detected when the supply of the general power is resumed from the switching mode power supply 10 after a power failure occurs to the printer control module 70. .

In addition, the power switching circuit 40 receives the general power from the switching mode power supply 10 connected through the switching of the non-power switch control circuit 20, when the power failure occurs, the USB current control module 50 The USB power supplied from the notebook 2 connected through the power is applied to the Logic power control module 60.

In addition, when the power supply switching circuit 40 resumes the supply of the general power from the switching mode power supply 10 after a power failure, the general power is applied to the Logic power control module 60 and the USB power being supplied is The supply is interrupted according to the potential difference from the general power supply.

Here, the USB power is supplied from the notebook computer 2 connected through the USB current control module 50 in accordance with the potential difference generated when the power supply from the non-power switch control circuit 20 to the power switching circuit 40 is stopped when a power failure occurs. It is preferable to understand the power supplied to the power switching circuit 40.

In addition, the USB current control module 50 is provided between the power switching circuit 40 and the notebook 2 to receive the USB power from the notebook 2, the potential difference occurs in the power switching circuit 40 in accordance with the power outage In this case, the USB power is applied to the power switching circuit 40.

In addition, the logic power supply control module 60 supplies general power or USB power applied from the power switching circuit 40 to the printer control module 70 and the nonvolatile memory 80.

In addition, the printer control module 70 receives printing data (hereinafter referred to as 'USB data') from the notebook computer 2 to perform printing, and receives a power failure recognition signal from the power failure detection module 30. In this case, the printing is stopped and the USB data is stored in the nonvolatile memory 80.

In addition, when receiving the power restart recognition signal from the power failure detection module 30, the printer control module 70 indexes the USB data stored in the nonvolatile memory 80 to perform the stopped printing.

The nonvolatile memory 80 stores USB data received from the printer control module 70, and deletes the pre-stored USB data when printing of the USB data is completed.

That is, according to the configuration as described above, the printer output data loss prevention system according to the present invention according to the present invention, the power supply to replace the general power supply in accordance with the power failure recognition signal that automatically recognizes the power failure generated during the print job as the instant power failure USB It automatically converts to a power source and keeps the USB communication from being disconnected. At the same time as the power failure recognition signal is applied, work data is stored and managed in a nonvolatile memory.

At this time, as long as the alternative power is maintained, there is no data loss during the power failure, and the processor enters the print standby state and indicates that the power failure is indicated by a separate LED display.

In addition, when the power failure is restored, it automatically recognizes the return of the power failure and automatically switches from the USB power supply to the general power supply according to the circuit implementation, and the USB power supply (alternative power supply) is automatically cut off. At that moment, the processor receives a power-up recognition signal to indicate that the main power is turned on by the LED status indication, and informs the user that the data output standby mode has been entered. Therefore, the USB power supply (alternative power supply) is not used in the non-interruption state, and is used only during a power failure.

Meanwhile, referring to FIG. 3, a system for preventing printer output data loss during power failure according to a second embodiment of the present invention will be described below.

According to the second embodiment of the present invention, in the event of a power failure, the first USB power supplied from the notebook computer 2 to which the USB current control module 50 of the printer 1 is connected is applied to the power switching circuit 40. Unlike the embodiment, when a power failure occurs, the battery power of the backup battery 100 which is provided inside the printer 1 and is charged is applied to the power switching circuit 40 through the current limit circuit 90.

That is, the configuration according to the second embodiment is the switching mode power supply 10, the non-power switch control circuit 20, the power failure detection module 30, the power switching circuit 40, the logic power control module 60, the printer The control module 70, the nonvolatile memory 80, the current limit circuit 90, the backup battery 100, and the battery charger IC 110 are configured to be included.

Specifically, the switching mode power supply 10 supplies general power to the connected printer 1.

In addition, the non-power switch control circuit 20 controls the supply of the general power applied from the switching mode power supply device 10 to the power switching circuit 40 through the on / off switching, but cut off the reverse current in the event of a power failure do.

In addition, the power failure detection module 30 is grounded between the switching mode power supply device 10 and the non-power switch control circuit 20, when a power failure occurs, the power failure detection signal automatically detected by the printer control module 70 When the supply of the general power is resumed from the switching mode power supply 10 after the power failure occurs, the power resume recognition signal is automatically sensed and applied to the printer control module 70.

In addition, the power switching circuit 40 receives the general power from the switching mode power supply device 10 connected through the switching of the non-power switch control circuit 20, if a power failure occurs, through the current limit circuit 90 The battery power supplied from the connected backup battery 100 is applied to the logic power control module 60.

In addition, when the supply of the general power from the switching mode power supply 10 resumes after a power failure, the power switching circuit 40 applies the general power to the Logic power control module 60 and the battery power being supplied is The supply is interrupted according to the potential difference from the general power supply.

In addition, the logic power control module 60 supplies general power or battery power applied from the power switching circuit 40 to the printer control module 70 and the nonvolatile memory 80.

In addition, the printer control module 70 receives the USB data for the printer output from the PC (3) to perform printing, when receiving the power failure recognition signal from the power failure detection module 30, and at the same time stops printing The USB data is stored in the nonvolatile memory 80.

In addition, when receiving the power restart recognition signal from the power failure detection module 30, the printer control module 70 indexes the USB data stored in the nonvolatile memory 80 to perform the stopped printing.

In addition, the current limit circuit 90 is provided between the power switching circuit 40 and the backup battery 100, when a potential difference occurs in the power switching circuit 40 according to the occurrence of power failure, the battery power supply circuit ( 40).

When the power failure occurs, the backup battery 100 charges the battery power for supplying battery power to the power switching circuit 40, and the power switching circuit 40 under the control of the battery charger IC 110. Control the backup battery 100 to apply the battery power.

In addition, the operating aspects of the printer output data loss prevention system in case of power failure of the present invention will be described as follows.

In the power failure prevention system according to the present invention, the timing at which power is switched is changed every time the power failure occurs, that is, during printing, feeding, cutting, or normal standby mode, respectively, power failure (instantaneous power failure) Function), the main power down timing changes according to the print operation load conditions.

In addition, the main power up timing changes according to the variation of the inrush circuit or the power circuit block even when the power failure returns. This timing varies from several nsec to several msec, and the printer control module 70 of the present invention synchronizes different timings and prevents processor reset and data loss through the nonvolatile memory 80.

Therefore, it maintains AC power for a certain period of time and maintains 24V power in case of power failure, and has disadvantages such as battery size, weight, high cost, and difficulty of implementation, and it is time to maintain high output such as TPH and motor when applied to industrial printer. Unlike the conventional UPS method, which is short and has a high possibility of data loss, the printer output data loss prevention system in case of power failure according to the present invention is easy to implement a circuit and saves cost, and also has a longer data retention time due to low power consumption of less than 5V / 200mA. long.

In addition, the present invention improves the disadvantages of the conventional UPS which is used as a 24V controlled power on / off Rocker switch in the SMPS power input state, but the Rocker switch control does not operate due to the interruption of the 24V power supply in case of power failure, the conventional UPS mass production The circuit design operates as a power on / off switch even in a non-powered (0V) state so that the logic power can be turned on / off by controlling an alternative power supply (USB power supply) even when the power failure mode is entered. That is, it is designed as a simultaneous use circuit that controls the on / off of the general power supply (24V) during non-interruption and the on / off of the USB power supply during the power failure (non-power supply).

In addition, the present invention is to improve the disadvantage that the power down phenomenon occurs after a certain time (10 minutes) even when applied to the backup power supply in case of power failure because SMPS potential is not floating state, but shifted to GND, SMSM power interruption (interruption) It is configured to prevent power down due to reverse current caused by SMPS internal GND resistance during power failure.

As described above and described with reference to a preferred embodiment for illustrating the technical idea of the present invention, the present invention is not limited to the configuration and operation as shown and described as described above, it is a deviation from the scope of the technical idea It will be understood by those skilled in the art that many modifications and variations can be made to the invention without departing from the scope of the invention. Accordingly, all such suitable changes, modifications, and equivalents should be considered to be within the scope of the present invention.

S: Printer output data loss prevention system in case of power failure
1: printer 2: notebook
3: PC 10: Switching Mode Power Supplies
20: no power switch control circuit 30: power failure detection module
40: power switching circuit 50: USB current control module
60: Logic Power Control Module 70: Printer Control Module
80: nonvolatile memory 90: current limit circuit
100: backup battery 110: battery charger IC

Claims (5)

In the printer output data loss prevention system in case of power failure,
When the normal power supply from the switching mode power supply to the power switching circuit is controlled through on / off switching, but the normal power supply from the switching mode power supply is abnormally interrupted (when a power failure occurs), A non-power switch control circuit for blocking reverse current;
A power failure detection module for applying a power failure recognition signal automatically detected when the power failure is grounded between the switching mode power supply and the non-power switch control circuit to a printer control module;
A power switching circuit that receives general power from the switching mode power supply device and applies a USB power supplied from a notebook connected through a USB current control module to a logic power control module when a power failure occurs;
A USB current control module receiving USB power from the notebook and applying the USB power to the power switching circuit when a potential difference occurs in the power switching circuit due to a power failure;
A Logic power control module for supplying the general power or the USB power applied from the power switching circuit to a printer control module and a nonvolatile memory; And
The printer receives the USB data for the printer output from the notebook and performs printing. When the power failure detection signal is received from the power failure detection module, the printer stops printing and simultaneously stores the USB data in the nonvolatile memory. module;
Including;
When the power failure occurs, the USB power is supplied from the notebook connected through the USB current control module to the power switching circuit according to a potential difference generated by stopping the power supply from the non-power switch control circuit to the power switching circuit. Printer output data loss prevention system, characterized in that the power supply.
The method of claim 1,
A power failure detection module applying a power resume recognition signal automatically detected when the supply of general power is resumed from the switching mode power supply after the power failure occurs;
After the power failure, when the supply of the general power is resumed from the switching mode power supply device, the power supply is applied to the logic power control module and the power supply to the USB power supply which is already supplied is stopped according to the potential difference with the general power supply. Circuit;
A printer control module for controlling the printing to be continued after indexing the USB data stored in the nonvolatile memory when the power resume detection signal is received from the power failure detection module; And
And a non-volatile memory for storing the USB data received from the printer control module and deleting the pre-stored USB data when printing of the USB data is completed.
delete In the printer output data loss prevention system in case of power failure,
Controlling the supply of general power applied from the switching mode power supply to the power switching circuit through the on / off switching, but when the general power supply from the switching mode power supply is abnormally interrupted (when a power failure occurs) A non-power switch control circuit for blocking a current;
A power failure detection module for applying a power failure recognition signal automatically detected when the power failure is grounded between the switching mode power supply and the non-power switch control circuit to a printer control module;
A power switching circuit configured to receive general power from the switching mode power supply device and to supply a battery power supplied from a backup battery connected through a current limit circuit to a logic power control module when a power failure occurs;
A Logic power control module for supplying general power or battery power supplied from the power switching circuit to a printer control module and a nonvolatile memory;
A printer control module which receives USB data for printer output from a PC and performs printing, and stops printing when the power failure recognition signal is received from the power failure detection module and stores the USB data in a nonvolatile memory; And
A current limit circuit provided between the power switching circuit and the backup battery and applying a battery power to the power switching circuit when a potential difference occurs in the power switching circuit according to a power failure. Data loss prevention system.
The method of claim 4, wherein
A power failure detection module applying a power resume recognition signal automatically detected when the supply of general power is resumed from the switching mode power supply after the power failure occurs;
After the power failure, when the supply of the general power is resumed from the switching mode power supply, the general power is supplied to the Logic power control module, and the battery power that is being supplied is interrupted according to the potential difference with the general power. Circuit;
A printer control module for controlling the printing to be continued after indexing the USB data stored in the nonvolatile memory when the power resume detection signal is received from the power failure detection module; And a non-volatile memory storing USB data received from the printer control module and deleting the stored USB data when printing of the USB data is completed.

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