JPH1115439A - Led display system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten changing time by performing the changing of display while interrupting a sequence control program performing a display operation thereby reducing the amount of communication information and the load of a central control unit and a communication channel. SOLUTION: A central control unit 25 outputs the display of an LED display device 10, a command controlling the device and display data from a control means 26 to an I/O part 30. The I/O port 30 transmits a codingly modulated interruption signal S25 coming from the control means 26 to an I/O busses 35. An I/O port 15 fetches this and outputs an interruption decoded signal S15 to be obtained by decoding the signals 25 to a control means 16, which outputs a confirmation signal S16 to the I/O port 15 in order to inform the completion of a processing to the central unit 25. The confirmation signal S15 candidly modulated at here is transmitted to the I/O busses 35 and it is received at the I/O 30 and the control means 26 confirms that the interruption signal S25 is processed in the display device 10 to complete the transmitting of the signal S25 and the unit 25 is liberated from the LED display device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for providing guidance and information service to a user at a station, an airport, a road, or the like, and performs a display operation in a predetermined order by an interrupt signal from a central control device. The present invention relates to an LED display system capable of interrupting a sequence to be performed and displaying an interrupt.

[0002]

2. Description of the Related Art As a conventional LED display system, a central control device and an LED display device installed at a station, an airport, a road, or the like, and a basic program for displaying characters and characters on the LED display device are stored. ROM (Read
There is known an LED display device that includes a character and a character based on a command and display data transmitted from a central control device.

[0003]

However, in the conventional LED display system, each time the LED display device receives a display change instruction from the central control device, a RAM (Random Accumulator) is used.
Since the display data stored in the ess memory is rewritten, when the display is changed, the central control device polls the display device each time the plurality of display devices change the display, and the plurality of display devices perform the respective display operations. Command and display data must be transmitted, and L
The control of the ED display device becomes complicated, the amount of communication information increases, a load is placed on a communication line, a change time is required, and appropriate display cannot be easily performed.

The present invention has been made to solve the above-mentioned problems of the prior art, and has as its object to provide a sequence control program for performing a display operation of each display device by an interrupt signal from a central control device. An object of the present invention is to provide an LED display system capable of reducing the amount of communication information for change to reduce the load on the central control device and the communication line, shortening the change time, and displaying an interrupt.

[0005]

In order to solve the above problems, an LED display system (1) according to the present invention comprises a central controller (25) for managing and controlling the entire system, and a central controller (25). LED that displays based on the instruction of
A display device (10A to 10N), and in particular a LED display device (10A to 10N) storing a basic program for displaying and a program for processing an interrupt signal from the central control device (25); 17), control means (16) for decoding the interrupt signal (S25) sent from the central control device (25) and performing control for displaying based on the interrupt signal (S25); 25)
(18) for storing the display data (S25) sent from the control unit (16), and a control signal (S16) from the control means (16).
LE that displays character information and characters based on E)
A D unit (14) is provided, and a display corresponding to an interrupt signal from the central control device (25) can be performed.

Therefore, the LED display system (1) can interrupt the sequence control program for performing the display operation of each display device, which has been executed by the interrupt signal from the central control device, to perform the change display. The amount of information is reduced, the load on the central control unit and the communication path is reduced, and a change display with a shorter change time can be performed.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an overall block configuration diagram of the LED display system according to the present invention. In FIG. 1, the LED display system 1 includes an LED display device (10A to 10N) including a box 11, a window 12, a cover member 13, and an LED unit 14, and a control unit 26, a display 27, a keyboard 28, and a memory 29. And a central control device 25.

A window 12 is formed on the front side of the hollow box 11, and the window 12 is provided with a cover member 13 for waterproofing. The cover member 13 is made of a transparent member. Inside the box 11, a plurality of LEDs in which a large number of LED light emitting elements are arranged in a matrix are provided.
The ED units (14, 14) are provided on the window 12 side.

The LED display devices (10A to 10N) display character information and characters in accordance with a program stored in a ROM of the device itself, and are connected to a central control device 25 by a bus 35.
The character information and the character are displayed based on the interrupt signal from No. 5.

FIG. 2 is a block diagram of a main part of the LED display system according to the present invention. In FIG. 2, the LED display system 1 includes a central control device 25 including a control unit 26, a display 27, a keyboard 28, a memory 29, and an I / O (Input / Output) port 30, and an I / O port 1
5, control means 16, memory 17, memory 18, memory 1
9, an LED display device 10 including an LED driver 20 and an LED unit 14, and an I / O bus 35.

The central control unit 25 sends L
The display of the ED display device 10, a command for controlling the display, and display data are output to the I / O port 30. The I / O port 30 sends an encoded and modulated interrupt signal S25 from the control means 26 to the I / O bus 35.

I / O port 15 of LED display device 10
Takes in the interrupt signal S25 on the I / O bus 35 and outputs an interrupt decoded signal S15 obtained by decoding to the control means 16.

The control means 16 includes a CPU (Central Processes).
sor unit), decodes the interrupt decoded signal S15, and outputs display data S16C obtained by performing signal processing based on the decoding to the memory 18. Then, the control means 16 receives the interrupt signal S25 sent from the central control device to the I / O bus 35 by the LED display device 10, and outputs a confirmation signal S16F to the central control device 25 to inform the central control device 25 that the processing has been completed. Output to the / O port 15.

The I / O port 15 converts the acknowledgment signal S16F from the control means 16 into an I / O signal by encoding and modulating the acknowledgment signal S15.
It is sent to the bus 35. The central control unit 25 receives the confirmation signal S15 sent to the I / O bus 35 at the I / O port 30, and confirms that the interruption signal S25 has been processed by the LED display device 10 by the control means 26, and outputs the interruption signal. The transmission of S25 is completed, and the device is released from the LED display device.

The memory 17 is composed of a ROM or the like, and stores a basic program for displaying characters and characters and a program for processing an interrupt signal from the central control unit 25. The memory 18 includes a RAM or the like, and stores the display data S15 decoded based on the control signal S16C from the control unit 16. The control means 16 controls the display data S15 stored in the memory 18 based on the program and the display data stored in the memory 17.
Is output to the display memory (RAM) 19.

A display memory (RAM) 19 converts the display signal S19 obtained by sequentially reading the display signal S16E into an LE.
The information is output to the LED unit 14 via the D driver 20 to display character information and characters.

As described above, the LED display system 1 includes a central control unit 25 including the control means 26, the display 27, the keyboard 28, the memory 29, and the I / O (Input / Output) port 30, the I / O port 15, Control means 1
6, an LED display device 10 including a memory 17, a memory 18, a memory 19, an LED driver 20, and an LED unit 14, and an I / O bus 35;
Sends a command and display data to each LED display device (10A to 10N) from the
It is released from the ED display device (10A to 10N).

Therefore, the LED display system 1 transmits an interrupt signal from the central control unit 25 to each of the display devices (10A to 10N) when performing a change display by an interrupt, and the designated display device (10) interrupts. The signal is fetched, interrupted by the sequence control program being executed, and the LED display device itself controls the change display, so that the amount of communication information is reduced to the central control device 25 and the communication path (I / O bus). Can reduce the load on the display and display interrupts with a reduced change time.

FIG. 3 is an explanatory diagram of an interrupt signal format. In FIG. 3, the interrupt signal format includes M bytes of a transmission flag, a destination address, an interrupt command, data, and an end flag (Eed Of Transmission).

The transmission flag is transmitted from the central controller 25 to the I / O
The exclusive use of the bus 35 is indicated by the LED display device (10
A to 10N). The destination address is
The destination of the interrupt signal S25 sent from the central control device 25 is designated, and the designated LED display device (10A
To 10N) receive the interrupt signal S25.

The interrupt command is sent to the LED display device (10A to 10A).
10N). Data is,
This is information related to display such as character information and characters displayed by an interrupt command, or display position information, color information, display count, display time, and display format (alternate display, floating display, simultaneous display, etc.).

The end flag is determined by the LED display device (10A to 10A).
10N) to notify the end of the interrupt signal train from the central control unit 25.

FIG. 4 is an explanatory diagram of an interrupt display according to the present invention. FIG. 4 shows that the display A and the display B are alternately displayed in the LED unit 14 by the program and the display data stored in the memory 17 until time t1.

From the time t1 to the time t2, the LED unit 14 shows the flow display C by the interrupt signal S25 from the central control unit 25. At time t2 or at the end of the flow, the display by the interrupt signal S25 ends, and at time t2
2, or after the end of the flow, the display returns to the display based on the program and the display data stored in the memory 17 again, and the display A and the display B are alternately displayed (t2 to t3).

The flow display C (t3 to t3) is received again after t1 seconds until the release of the interrupt display is received from the central control unit 25.
4) is displayed. FIG. 4 shows the sink display, but the display may be alternate display or simultaneous display.

FIG. 5 is a flow chart of a communication program of the LED display device according to the present invention.

ST (step) 1 includes a central control unit 25
It is determined whether the transmission flag F of the interrupt signal S25 has been transmitted to the I / O bus 35 (F = 1) or not (F = 0).
= 1), the process proceeds to ST2, and if (F = 0), the process returns to the start and enters the standby state. ST2 receives (takes in) the interrupt signal S25 sent from the central control device 25 to the I / O bus 35 at the I / O port 15, performs a decoding process, and transitions to ST3.

In step ST3, the interrupt decoding signal S15 decoded by the control means 16 is decoded, and the process proceeds to step ST4. ST
In step 4, the control means 16 determines whether the destination address (A) is the LED display device (10) (A = 1) or not (A = 0). And (A = 0)
If so, it returns to the start and enters the standby state.

In ST5, the control means 16 decodes the interrupt instruction to determine whether the interrupt instruction is an instruction (YES) or not (NO). If (YES), the process proceeds to ST6. Transition to ST8.

ST6 is an LED designated for interrupt processing.
A confirmation signal S15 is sent from the display device (10) to the central control device 25 to inform the central control device 25 of the interrupt processing, and the process proceeds to ST7. In step ST7, the fact that the interrupt processing is instructed is stored (I = 1), and the process returns to the start.

In ST8, the control means 16 decodes the interrupt command and determines whether the interrupt command is released (YES) or not (NO). If (YES), the process proceeds to ST9; if (NO), Return to start. In step ST9, the LED display device (10) for which the interrupt process has been designated transmits a confirmation signal S15 to the central controller 25 to inform the central controller 25 that the interrupt process has been canceled, and the process proceeds to ST10. ST1
0 stores the cancellation of the interrupt processing (I = 0) and returns to the start.

FIG. 6 is a flow chart of a display program of the LED display device according to the present invention. ST11 displays the character information and the character on the LED unit 14 and performs ST12.
Transitions to.

In ST12, the control means 16 sets (I = 1), and whether or not the display count has been achieved (YES) (NO).
Is determined, and if (YES), the process proceeds to ST13.
If (NO), return to start. In ST13, the control means 16 performs an interrupt display process and returns to the start.

[0034]

According to the present invention, the following effects are exhibited by the above configuration. The LED display system according to the present invention includes a central control device that manages and controls the entire system, and an LED display device that performs display based on a signal from the central control device,
In particular, the LED display device decodes the interrupt signal sent from the central control device, and performs control for executing signal processing based on the interrupt signal. From the central control device based on the control signal of the control device, A memory for storing display data of the transmitted interrupt signal, and an LED for displaying character information and characters based on a control signal from the control means
Unit, and can perform a signal processing function corresponding to an interrupt signal from the central control unit. Therefore, the unit can interrupt a sequence control program for performing a display operation of each display device by the interrupt signal from the central control unit. In addition, it is possible to reduce the amount of communication information for interrupt processing to reduce the load on the central control device and the communication path, shorten the change time, display interrupts, and improve reliability.

[Brief description of the drawings]

FIG. 1 is an overall block configuration diagram of an LED display system according to the present invention.

FIG. 2 is a block diagram of a main part of the LED display system according to the present invention.

FIG. 3 is an explanatory diagram of an interrupt signal format.

FIG. 4 is an explanatory diagram of an interrupt display according to the present invention.

FIG. 5 is a flowchart of a communication program of the LED display device according to the present invention.

FIG. 6 is a flow chart of a display program of the LED display device according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 LED display system 10 LED display device 14 LED unit 15 I / O port 15 16 control means 17 memory 18 memory 19 memory 20 LED driver 25 central control device 26 control means 27 display 28 keyboard 29 memory 30 I / O port 35 I / O bus

Claims (1)

[Claims] 1. A central control device (25) for managing and controlling the entire system, and an LED display device (10A to 10A) for displaying based on a command from the central control device (25).
N), the LED display device (10A to 10N) includes a basic program for displaying and a program for processing an interrupt signal (S25) from the central control device (25). A memory (17) for storing, and a control means (16) for decoding an interrupt signal (S25) transmitted from the central control device (25) and performing control for displaying based on the interrupt signal (S25). And an interrupt signal (S2) transmitted from the central control unit (25) based on the control signal (S16C) of the control means (16).
Memory (18) for storing display data (S25) of 5)
And an LED unit (14) for displaying character information and characters based on a control signal (S16E) from the control means (16). An interrupt signal (S25) from the central control device (25) is provided. LED with corresponding display
Display system.