JPH0933897A - Printer operation panel display controller - Google Patents

Abstract

(57) Abstract: An LCD display on an operation panel is guaranteed. An LCD display content is automatically displayed even when the LCD controller changes to a data unreceivable state due to static electricity noise by an LCD and a control program that initializes the LCD controller with a soft command within a fixed time by a hard timer. Returns.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation panel display control device for a printing device.

[0002]

2. Description of the Related Art Conventionally, an operation panel display control device for a printing apparatus of this type has an erroneous display on a liquid crystal display (hereinafter referred to as an LCD) on the operation panel due to static electricity noise and an LCD.
When the controller cannot be received, the same contents as the contents displayed on the LCD are overwritten on the LCD again for a certain period of time or at a certain timing, so that the LC on the operation panel
The D display was refreshing.

[0003]

Since the high-speed printing apparatus runs the paper at a high speed, friction and peeling electrification are likely to occur, and the apparatus may malfunction due to electrostatic noise.
In particular, the operation panel, which is often installed far from the printer control unit mainly composed of a microcomputer, is often erroneously displayed, and the display of the operation panel is garbled even though the printer control unit is operating normally. It often happens that they are left alone. In this case, the print result is guaranteed, but the display on the operation panel is garbled, so
There is an inconvenience that the operator is distrusted and the subsequent operations cannot be performed.

However, the conventional technique has a drawback in that when the LCD controller is changed to the data unreceivable state due to static electricity noise, the display may not be restored no matter how many overwrite processes are performed.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to display the operation panel of a printing apparatus, which restores the operation panel display within a fixed time (automatically) even when the LCD controller cannot receive data due to static electricity noise. This is accomplished by providing a controller.

[0006]

According to the present invention, the operation panel display control device of the printing apparatus configured as described above can automatically (automatically) within a fixed time even when the LCD controller is in a data unreceivable state due to electrostatic noise. It operates so that the LCD display on the operation panel is restored.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a flowchart of a refresh process according to an embodiment of the present invention, FIG. 2 is a flowchart of an LCD display update process, and FIG. 3 is a device configuration diagram.

In FIG. 3, reference numeral 87 is an operation panel,
A lamp 81, a latch circuit 82, an LCD 83, an LCD controller 84, a switch 85, and a driver 86 are mounted.

A printer controller 94 includes a microcomputer 91, a main memory 92, and a work memory 93. The microcomputer 91 has a built-in interval timer 95.

The operation panel 87 and the printer control unit 94 are
I / O port 88, I / O port 89, I / O port 9
0 is connected.

The present invention will now be described with reference to FIGS.

FIG. 2 shows a switch 85 on the operation panel 87.
9 is a flowchart showing a program executed when the display of LCD 83 is updated by pressing or by the data from the host computer.

That is, the LCD 83 on the operation panel 87
2 is executed, the data displayed on the LCD 83 on the operation panel 87 (contents to be displayed by the control device, hereinafter referred to as data A) is always stored in the main memory 92. Can be saved.

FIG. 1 is a flow chart showing a program for executing refresh processing.

First, the contents displayed on the LCD 83 on the operation panel 87 (hereinafter referred to as data B) are written from the LCD controller 84 to the work memory 93 of the microcomputer 91 (step 10).

Next, the data A stored in the main memory 92 and the data B in the work memory 93 are compared (step 20). In the comparison operation in step 20, it is also possible to detect and display that the LCD display is garbled due to external factors such as electrostatic noise.

If the comparison result of the data A and the data B matches, the data A in the main memory 92 is set to L.
The data is displayed on the CD 83 (step 30) and the refresh operation is completed.

On the other hand, if the comparison result of the data A and the data B does not match, an initial setting command is issued to the LCD controller 84 (step 40).

Next, the data A stored in the main memory 92 is displayed on the LCD 83 (step 30), and the refresh process is completed.

As described above, by executing the program of FIG. 1 by the interval timer 95 at regular intervals, L
The display of the CD can be guaranteed.

[0022]

According to the operation panel display control device of the printing apparatus of the present invention, the display contents can be automatically restored even when the LCD is erroneously displayed or the LCD controller is in a state in which data cannot be received due to static electricity noise. I can.

[Brief description of drawings]

FIG. 1 is a flowchart showing a program for executing a refresh process according to the present invention.

FIG. 2 is a flowchart of an LCD display update process according to the present invention.

FIG. 3 is a block diagram showing an embodiment of an operation panel display control device according to the present invention.

[Explanation of symbols]

81 is a lamp, 82 is a latch circuit, 83 is an LCD, 84
Is an LCD controller, 85 is a switch, 86 is a driver, 87 is an operation panel, 88 is an I / O port 1, 89 is an I / O port 2, 90 is an I / O port 3, 91 is a microcomputer, and 92 is a main memory. , 93 is a work memory, 94 is a printer controller, and 95 is an interval timer.

Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location G09G 3/18 B41J 29/00 T

Claims (2)

[Claims] 1. A printer having an operation panel having a liquid crystal display, the printer comprising a timer for engraving a fixed time period, and a control program means for initializing an LCD controller by a software command for each period of the timer. Operation panel display controller. 2. In a printing apparatus having an operation panel having a liquid crystal display, a program means for marking a certain section of a page to be printed, and a control program means for initially setting an LCD controller by a software command for each certain section of the page. An operation panel display control device of a printing apparatus including the.