JPH04344924A - printer device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates primarily to computer peripheral equipment and printer devices in POS systems.

0002

[Prior Art] Conventionally, this type of technology has been developed when the power supply to the main power supply is cut off due to an external factor while the printer is printing.
If the power supply is restored after that, the data backed up in each buffer section will be printed after the power supply to the main power supply was cut off, and then the data will be printed after the power supply is restored.
It was of a type in which the data backed up in each buffer section was printed continuously.

The operation of a conventional printer device will be explained based on the flowchart shown in FIG. In Figure 4, 4
1 is power-on to the main power supply, 42 is a power-up detection and judgment to detect whether the power supplied to the main power supply is normal, 43 is to judge whether data is backed up inside each buffer, 44 is each If it is determined that the data has not been backed up in the buffer, 45 will print the backed up data if it is determined that the data has been backed up in each buffer, and 47 will print the next data after all processing is completed. Indicates the data waiting state.

[0004] When the main power supply 17 of the printer device is turned on 4
1, first, power-up detection and judgment 42 is performed. If it is determined that the power-on of the main power source is normal, then a check 43 is performed to see if data has been backed up in each buffer section. If it is determined that data is not backed up in each buffer section 44, a normal data waiting state 47 occurs. In addition, if it is determined that data is backed up in each buffer section45, the data remaining in each buffer section will be printed following the printing that was done before the power supply to the main power supply was cut off due to an external factor. Let's do it. In such a case, as shown in FIG. 5, it is difficult to distinguish between printing before the power is cut off and printing after the power is restored. Furthermore, it is not possible to easily detect missing data when data is being sent from the image buffer section 14 to the printing mechanism section 15. In FIG. 5, 51 indicates printing in the normal state;
Reference numeral 52 indicates that the power supply to the main power supply is cut off due to an external factor, and then the power supply to the main power supply is restored, and data backed up in each buffer section is printed.

[0005]

[Problems to be Solved by the Invention] In this way, in the above-mentioned prior art, when the power supply to the main power supply is cut off due to an external factor while the printer is printing, and then the power supply is restored, the There was a problem in that all data was backed up and it was not possible to distinguish whether all data was printed or where it occurred.

The present invention has been made to solve such problems, and its purpose is to prevent data from being stored in each buffer section after the power supply to the main power source is cut off due to an external factor. To provide a printer that can clearly indicate that backed-up data exists by displaying it before printing the data if it has been backed up.

[0007]

[Means for solving the problem] An I/F unit that transmits and receives data to and from a host computer, a data buffer unit that temporarily holds data sent from the host, and data that decodes and prints the data. , the image buffer section that temporarily holds the converted data, the printing mechanism section that prints the data, and the main power supply section that supplies power to each of these sections. In a printer device that has a backup section that supplies power to each buffer section and backs up data in order to retain data in each buffer section even when the power supply to the main power supply is cut off due to an external factor, A printer device characterized by having means for displaying, if data remains in each buffer section when power supply is restored, before printing the data.

[0008]

Embodiment FIG. 1 is a hardware block diagram in an embodiment of the present invention. In FIG. 1, 11 is an interface unit (hereinafter abbreviated as I/F unit) that transmits and receives data to and from the host computer, 12 is a data buffer unit that temporarily holds data sent from the host computer, and 1
3 is a control unit that decodes the data sent from the data buffer section, converts the data for printing, and causes the data from the image buffer section 14 to be actually printed by the printing mechanism section 15; 14 is for printing. 15 is a printing mechanism section for actually printing data; 16 is an image buffer section for temporarily storing converted data; 16 is an image buffer section for temporarily storing converted data; 16 is an image buffer section for temporarily storing converted data; , a backup section for supplying power to the data buffer section 12 and the image buffer section 14 for temporarily storing data in both buffer sections, and a main power supply section 17 for supplying +5V and +24V to each section. .

Next, the conventional example and the present invention will be explained regarding the embodiment having the above configuration.

First, data received by the I/F unit 11 is temporarily held in a data buffer unit 12. Next, the data is transmitted from the data buffer section 12 to the control section 13, where it is decoded and converted into data for printing, and temporarily stored in the image buffer section 14. The data held in the image buffer section 14 is again sent to the printing mechanism section 15 via the control section 13, where actual printing is performed.

[0011] In this series of steps, during printer printing,
When the power supply to the main power supply 17 is cut off due to an external factor, the power supply switches to the main power supply 17, and power is supplied from the backup unit 16 to the data buffer unit 12 and image buffer unit 14, temporarily saving data. can be retained.

Next, the printer device according to the present invention will be explained based on the flowchart shown in FIG. Figure 2
In the process, 21 turns on the power to the main power supply, 22 detects and judges whether the power turned on to the main power supply is normal, and 23 judges whether data is backed up inside each buffer. , 24, when it is determined that data is not backed up in each buffer, 25, when it is determined that data is backed up in each buffer section, and 26, when it is determined that data is backed up inside each buffer. In this case, 27 indicates the printing of the backed up data, and 28 indicates the state of waiting for the next data after all processing is completed.

[0013] When the main power supply 17 of the printer device is turned on 2
1, first, power-up detection and judgment 22 is performed. If it is determined that the power-up of the main power source is normal, a check 23 is then performed to see if data has been backed up in each buffer section. If it is determined that the data is not backed up in each buffer section 24, a normal data waiting state 28 occurs. In addition, if it is determined that the data has been backed up in each buffer section 25, a display 26 is displayed here to distinguish between the printing that was performed before the main power was cut off due to an external factor and the printing that will be performed from now on. . ■ Wavy lines,
Performs printing such as double lines and overprinting. ■ Make a sound such as an alarm. ■ Blink (light up) the LED, etc. etc.

After displaying any of the above items, the data backed up in each buffer section is printed 27. After these prints are completed, the printer device returns to normal operation and enters the next data waiting state 28. An example of printing by this printer device is shown in FIG. In Fig. 3, 31 indicates printing in a normal state, and 32 indicates printing to be performed in the future when the power supply to the main power supply is cut off due to an external factor and it is determined that data has been backed up in each buffer section. This is an example of a display means for doing so. 33 indicates printing of backed up data.

[0015]

Effects of the Invention As described above, according to the present invention, when the power supply to the main power supply is cut off due to an external factor and the power supply is restored to normal, it can be distinguished from normal printing performed up to now. Since the printer device has a means to display this information, it is possible to instantly check whether or not the power supply has been cut off as described above during printing, and whether there is any data loss when the power is cut off. This has the effect that it can be easily determined, and data can be easily confirmed when such a situation occurs.

[Brief explanation of drawings]

FIG. 1 is a hardware block diagram showing one embodiment of the present invention.

FIG. 2 is a flowchart diagram showing an embodiment of the present invention.

FIG. 3 is an example of printing according to the present invention.

FIG. 4 is a flowchart diagram illustrating an example of a conventional technique.

FIG. 5 is an example of printing by conventional technology.

[Explanation of symbols]

11 I/F section 12 Data buffer section 13 Printer control section 14 Image buffer section 15 Printing mechanism section 16 Backup section 17 Main power supply section

Claims (1)

[Claims] Claim 1: An I/F unit that transmits and receives data to and from a host computer, a data buffer unit that temporarily holds data sent from the host, and a control unit that decodes the data and converts it into data for printing. an image buffer section that temporarily holds converted data, a printing mechanism section that prints data, a main power supply section that supplies power to each of these sections, and a main power supply section that supplies power to each of these sections. Supply power to each buffer section to hold data in the section.
In a printer device that has a backup section for backup, if the power supply to the main power supply is cut off due to an external factor and then the power supply is restored, if data remains in each buffer section, the data will not be printed. Before doing
A printer device characterized by having means for displaying this.