JPH04267174A - Printing device - Google Patents

Abstract

PURPOSE:To improve the reliability of a printing device by preventing the printing device from data missing. CONSTITUTION:The printing device is composed of a power supply turn ON/ OFF switch 2, a main control part 3 which controls the activation of a printing device 1, a power supply control part 4 which turns the power supply ON/OFF in accordance with a command from the main control part 3, a page buffer 5 which stores print data, a memory device 6 which stores information to determine whether unprinted data is stored in the page buffer 5, and an alarm 7 which sounds an alarm for warning if the unprinted data is stored in the page buffer 5, when the switch 2 is turned OFF once.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus, and more particularly to a printing apparatus for ensuring data integrity when the printing apparatus is turned off with unprinted data remaining inside the printing apparatus.

0002

[Prior Art] When the power switch of a conventional printing device is turned off while receiving data from a host device or holding unprinted data, an unconditional error occurs even though the printing device holds unprinted data. I had already turned off the power to the printer.

0003

[Problems to be Solved by the Invention] In the conventional printing device described above, when the power switch is turned off even though unprinted data is held, the power to the printing device is unconditionally turned off. However, there was a problem in that unprinted data held inside the printer was erased due to the operator's carelessness in turning off the power switch.

0004

[Means for Solving the Problems] The printing device of the present invention includes a power supply cutoff switch, a main control unit that controls the operation of the printing device, and a power supply that turns on/off the power according to a command from the main control unit.
A power supply control unit that controls the FF, a page buffer that stores print data, a memory that stores information as to whether or not unprinted data is stored in the page buffer, and the power supply cutoff switch that is turned off once. A warning device is provided which, when turned off, sounds an alarm when unprinted data is stored in the page buffer.

[0005]

[Operation] In the present invention, while the printing device is operating, information on the presence or absence of unprinted data in the page buffer is always detected, and this information is stored in the memory. When the power supply cutoff switch of the printing device is turned OFF once in the retained state, the main control unit detects that the power supply cutoff switch is turned OFF and searches for the presence/absence information of unprinted data stored in the memory. If unprinted data exists, an alarm will sound to notify the outside.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of the present invention. In FIG. 1, 1 is a printing device, and this printing device 1 includes a power supply disconnection switch 2 that can be operated from the outside, a main control section 3 that controls the operation of the printing device 1, and a main control section 3 that controls the operation of the printing device 1. A power control unit 4 that controls power ON/OFF based on commands, a page buffer 5 that stores print data, and a memory 6 that stores information as to whether unprinted data is stored in this page buffer 5. , a warning device 7 that sounds a warning alarm when unprinted data is stored in the page buffer 5 when the power supply cutoff switch 2 is turned off once, a character drawing control unit 8 that controls drawing, and a printing It is comprised of a device control section 9 that controls the device section of the apparatus 1, and a printing section 10 that actually performs printing and ejection. 11 is a host device.

Next, the operation of the embodiment shown in FIG. 1 will be explained. First, while the printing apparatus 1 is operating, the main control section 3 always detects the presence or absence of unprinted data in the page buffer 5 and stores this information in the memory 6. Then, while receiving data from the host device 11 or holding unprinted data, turn off the power supply cutoff switch 2 of the printing device 1 once.
When set to F, the main control unit 3 detects this and the power supply control unit 4
Let me know. This power supply control unit 4 recognizes that the power supply cutoff switch 2 is turned off once, but the printing device 1
Do not turn off the power.

Next, the main control section 3 detects the unprinted data presence/absence information stored in the memory 6 and confirms whether or not unprinted data is stored in the page buffer 5. If unprinted data is stored, the main control section 3 issues a command to the warning device 7, and the warning device 7 sounds an alarm to notify the user. At this time, if the power supply cutoff switch 2 is turned on, the power supply control section 4 recognizes that the power supply cutoff switch 2 is turned on again, and operates the character drawing control section 8 and the device control section 9. Then, the unprinted data is printed and discharged from the printing unit 10. Further, when the power supply cutoff switch 2 is turned off, the power supply control unit 4 turns off the power supply cutoff switch 2 for the second time.
FF is recognized and the power of the printing device 1 is completely turned off.

[0009]

As explained above, the printing device of the present invention constantly detects the presence or absence of unprinted data in the page buffer while the printing device is in operation, stores this information in memory, and stores the information in the memory so that it can be accessed from the host device. If you turn off the power supply cutoff switch of the printing device once while receiving data or holding unprinted data, the main control unit detects that the power supply cutoff switch is turned off and deletes the unprinted data stored in the memory. If the print data presence/absence information is searched and unprinted data exists, a warning device will sound to notify the outside, so that when the power is forced off due to an abnormal operation, the user will be able to detect if there is unprinted data inside the printing device. Since it can be confirmed that the data exists, it is possible to eliminate data omissions, which has the effect of improving the reliability of the printer device.

[Brief explanation of the drawing]

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

[Explanation of symbols]

1 Printing device 2 Power supply cutoff switch 3 Main control section 4 Power control section 5 Page buffer 6 Memory 7 Warning device 8 Character drawing control section 9 Device control section 10 Printing Department

Claims (1)

[Claims] Claim 1: In a printing device, a power supply cut-off switch, a main control unit that controls the operation of the printing device, a power supply control unit that controls ON/OFF of the power supply based on commands from the main control unit, and a power supply control unit that controls the power supply and print data. a page buffer for storing unprinted data; a memory for storing information as to whether unprinted data is stored in the page buffer; and a memory for storing information as to whether unprinted data is stored in the page buffer; 1. A printing device comprising: a warning device that sounds a warning alarm when the printer is stored.