JPH09230817A - Synchronizing display method for display board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a expansion characteristic without the deviation of display content each board by performing circulation synchronizing display. SOLUTION: Display data is transmitted from an information display board 1 in which data can be stored to an expansion board 2 in which data can be stored, data is stored in memory area of both boards 1, 2, power sources 3, 4 for display of the both board 1, 2 are simultaneously turned off, and a trigger signal S1 for switching display is outputted from the information display board 1 to the expansion board 2. Receiving this trigger signal, the display data is displayed on the expansion board 2 as well as the information display board 1, power sources 3, 4 for display of both boards are turned on, and synchronizing display is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synchronous display method for a display board capable of performing cyclic synchronous display between an information display board and an expansion board.

[0002]

2. Description of the Related Art Although it is possible to add an expansion board to a conventional information display board, it is not possible to perform cyclic synchronization display between the information display board and the expansion board.

[0003]

In the above-mentioned conventional example, since the cyclic synchronization display cannot be performed, the display contents are biased for each board, and the expandability is not so high.

[0004]

In order to solve the above problems, the method of the present invention solves the above-mentioned problems by expanding an information display board 1 capable of storing data as shown in FIG.
Display data is stored in the memory areas of both boards 1 and 2 and the display power supplies 3 and 4 of both boards are turned off at the same time. A trigger signal _St is output, and after the trigger signal is received, the display data is displayed on the expansion board 2 together with the information display board 1, and the display power supplies 3 and 4 of both boards are turned on to perform synchronous display. And

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory diagram showing the configuration of an embodiment of the method of the present invention. In FIG. 1, 1 is an information display board, 2 is an expansion board, 3 and 4 are display power sources for the boards 1 and 2, 5 and 6 are master boards of the boards 1 and 2, processing boards on the slave side, and 7, Reference numerals 8 are display units each including a fluorescent display tube or the like. In this embodiment, the display data is transmitted from the processing board 5 constituting the information display board 1 on the master side to the processing board 6 constituting the expansion board 2 on the slave side connected thereto by the interface RS485 I / F. Send. The processing board 6 on the slave side that received the display data stores the data in the memory area. The master side processing board 5 also stores master side data in the memory area. The display power source 4 of the fluorescent display tube 8 on the slave side from the master side is turned off. At the same time, the display power supply 3 on the master side is also turned off. To processing board 6 on the slave side from the processing board 5 on the master side outputs a trigger signal S _t for switching the display. After receiving the trigger signal, the slave side displays the data received by the processing board 6 on the fluorescent display tube 8. The fluorescent display tube 7 on the master side also displays data. After the display process is completed,
The display power supplies 3 and 4 for the fluorescent display tubes 7 and 8 on the slave side are turned on. All the screens are displayed at the same time, and the display is in the circular synchronization display.

In the above-described embodiment, the circular synchronous display can be performed, and therefore, the lines can be connected and displayed. Since the master side manages the display menu, the memory capacity of the slave side is only 2 screens. Since up to 8 units can be connected, multi-function display can be performed.

[0007]

As described above, according to the present invention, it is possible to perform the cyclic synchronization display, the display contents are not biased for each board, and the expandability can be enhanced.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a configuration of an embodiment of a method of the present invention.

[Explanation of symbols]

 1 Information display board 2 Expansion board 3,4 Display power supply 5,6 Processing board 7,8 Display unit (fluorescent display tube)

Claims (1)

[Claims] 1. Information is transmitted from an information display board capable of storing data to an expansion board capable of storing data, the data is stored in a memory area of both boards, and the display power supply of both boards is turned off at the same time. A trigger signal for display switching is output from the display board to the expansion board, and after this trigger signal is received, the display data is displayed together with the information display board on the expansion board, and the display power of both boards is turned on to display synchronously. A method for synchronously displaying a display board, characterized by performing.