JPH0430079B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display system using power line transport.

Conventionally, this type of display system has a plurality of display lamps 2 on the display unit 1 side, as shown in FIG.
₁ , 2 ₂ ..., and this indicator lamp 2
Confirmation lamps 3 ₁ , 3 ₂ corresponding to ₁ , 2 ₂ ...
... are provided on the operation unit 4 side, and operation switches 5 ₁ , 5 ₂ ... provided on the operation unit 4 side.
The respective display lamps 2 ₁ , 2 _{2 .} . . and confirmation lamps 3 ₁ , 3 ₂ .
However, in this case, as many wires as the number of display lamps are required between the operation unit 4 and the display unit 1, and as the number of displays increases, the number of wires also increases. There is a drawback that the number of switches increases, making it difficult to expand the number of switches.Also, since the display only has two options, either on or off, there is a drawback that there is little information to be displayed.

The present invention has been made in view of the above-mentioned drawbacks.
The purpose of this is to require only a power line to connect the operating unit and the display unit.
The number of wiring is small, existing power lines can be used as is, and the installation location is not restricted, and the corresponding confirmation lamp on the operating unit side is driven in response to the return signal sent back from the display unit simultaneously with the display operation of the display unit. We have developed a display system using power line distribution that can ensure the confirmation of the display status on the display unit side, and can also make the display lamp blink in addition to turning it on and off, increasing the amount of displayed information. It is on offer.

The present invention will be explained below with reference to Examples.

FIG. 2 shows a schematic configuration diagram of a system according to an embodiment of the present invention. In the figure, 4 is an operating unit, 1 is a display unit, and these units 4 and 1 are connected via a two-wire power line 6. , each power source is obtained by the alternating current flowing through the power line 6, and the power line 6
Carrier signals are transmitted and received via the . The operating unit 4 includes a keyboard 7 having a numeric keypad and function keys, and display lamps 2 ₁ , 2 ₂ provided on the display unit 1 side.
Confirmation lamps 5 ₁ , 5 ₂ . . . corresponding to the display unit 1 and a display section 8 for displaying the numbers assigned to the display lamps 2 ₁ , 2 ₁ . , is equipped with a computer section 9 and a transmission unit 11, which will be described later. On the other hand, the display unit 1 is provided with a transparent panel on its surface, and this transparent panel is provided with display frames each having a number from "1" to a predetermined number.
Indicator lamps 2 ₁ , _{2 2 .} These display lamps 2 ₁ , 2 ₂ ...
It has a built-in control circuit section for display control, and a transmitting and receiving circuit section for transmitting and receiving carrier signals. Of course, the display lamps 2 ₁ , 2 ₂ . . . may be directly exposed for display.

FIG. 3 shows a schematic circuit block diagram of the operating unit 4, and the computer section 9 in the figure consists of a personal computer, a dedicated microcomputer, etc., and input data from the keyboard 7 and is transmitted via the parallel interface 10. Constantly monitors input commands input from unit 11,
If there is input data from the keyboard 7, an output command is determined and selected from the input data from a command table stored in the memory 12 in advance, and the output command is given to the transmission unit 11 via the parallel interface 10. An input command input from the ace 10 is determined from the command table, and confirmation lamps 5 ₁ , 5 ₂ .
It is now possible to create control data to select and control. Reference numeral 14 denotes a keyboard interface, and the keyboard interface 14 is used to create a signal corresponding to the input of each key via the key matrix of the keyboard 7 and provide it to the computer section 9 as the input data. The display interface 13 includes a confirmation lamp 5 ₁ , such as a light emitting diode connected to the matrix.
5 ₂ ... based on control data from the computer section 9.

The transmission unit 11 has a configuration as shown in FIG. 4, for example. In other words, 15 is a modem, and this modem 15 modulates and demodulates the carrier signal.
16 counts the received carrier signal frequency,
This is a frequency testing section that tests the presence or absence of a carrier signal during a predetermined testing period. Reference numeral 17 denotes a zero-cross detection section. This zero-cross detection section 17 detects the zero-cross point of the power supply voltage waveform and generates a zero-cross pulse. This zero-cross pulse is input to the timing signal generation section 18. The timing signal generator 18 is for generating signals and carrier signals for timing the operations of all the circuits shown in FIG. 4, using the reference signal from the reference signal generator 19 and the zero cross pulse. Reference numeral 20 denotes a signal processing logic circuit section which is the core of the transmission unit 11. This signal processing logic circuit section 20 judges output commands from the computer section 9 via the parallel data interface 10, creates transmission data, and also generates transmission data. The received data is reproduced from the signal verified by the frequency verification section 16, and when the address of the received data matches the own address, an input command is created based on the returned data and sent to the computer section 9 via the parallel data interface 10. It is to be sent to.

In this embodiment, the format of the carrier signal sent from the transmission unit 11 is as shown in FIG. In other words, it consists of a start mark, address data, mode data, and end mark. For example, the start mark is 1 bit, and the mode data is the display lamps ₂₁ to _216.
2 bits are provided to provide three modes of on, off and blinking, further 8 bits are provided as address data, and 1 bit is provided for the end mark. FIG. 6 shows an example of a carrier signal sent from the transmission unit 11 based on the above-mentioned format, and FIG. Waveform diagram of cross pulse, c is waveform diagram of carrier signal pulse, d
shows the waveform diagram of the frequency verification timing pulse,
In this example, one bit of the carrier signal is assigned to one period of the zero cross pulse, and the falling edge of this zero cross pulse is divided into four, and depending on whether or not there is a carrier signal in each divided section, (0101) is set as the start mark. ,
(0111) is data “1”, (0100) is data “0”,
(0110) is assigned to each end mark.
However, since the address data is 8 bits,
256 addresses can be accessed.
FIG. 7 shows the circuit configuration on the display unit 1 side, which includes a modem 21, a zero cross detection section 22, and a zero cross detection section 23.
24 timing signal generation units, 24 frequency verification units,
Each of the reference signal generating units 25 is equivalent to that of the transmission unit 11, and the signal processing logic circuit unit 26 reproduces the received data and determines which display lamps 2 ₁ to 2 ₁₆ are controlled based on the address data. and the mode data, output section 2
A control signal is output to 7. At the same time, reply data is created, and a reply signal corresponding to the control mode of the address is sent to the modem 21 as a carrier signal similar to the format shown in FIG. 5 after the received carrier signal ends.
It is now possible to send it via . Output section 27
For example, selects a predetermined display lamp 2 ₁ . Alternatively, a signal is output to control the lamp drive circuit 28 ₁ . . . to turn off or blink.

However, now the confirmation lamp 5 ₁ of the operation unit 4
~5 ₁₆ and each indicator lamp 2 ₁ ~ 2 ₁₆ of display unit 1
The display lamps 2 ₁ to 2 ₁₆ are arranged in one-to-one correspondence with each other.
Assign respective addresses to confirmation lamps 5 ₁ to 5 ₁₆ ,
When the system is started in FIG. 2, the operation unit 4 performs initial settings and sequentially transmits carrier signals to the display unit 1 to turn off the display lamps 2 ₁ to 2 ₂ , and displays the status and operation of the display unit 1. Initialize the confirmation lamps ₅₁ to ₅₁₆ of the unit 4. When the initial settings are completed, the computer section 9 of the operation unit 4 determines whether there is a key input, whether there is an output request for an output command, and whether there is an input command, and the confirmation lamp 5 is turned on.
_{1 .} . . and performs drive control operations for the display section 8. If there is a key input, the key input processing operation is performed, and if there is an output request for an output command, the transmission unit 11
If there is an input command, it processes the input command, and controls the drive of the confirmation lamp 5 ₁ . . . and the display section 8.

Now, if you select "Light" among the function keys on the keyboard 7 of the operating unit 4, insert the numeric keypad, and specify the address of the display lamp, for example ₂₁ , in decimal format, the display section 8 The address is displayed in decimal format, for example.
The computer section 9 of the operating unit 4 creates a predetermined output command in response to this key input and sends it to the transmission unit 1 via the parallel interface 10.
Send to 1. The transmission unit 11 creates transmission data based on the output command, that is, transmission data whose mode data is on and whose address data corresponds to the display lamp ₂₁ , and transmits it as a carrier signal. The display unit 1 determines the address data and mode data in the carrier signal, creates a corresponding control signal, and outputs it to the output section 27. At the same time, it creates reply data corresponding to lighting and sends the return signal to the operation unit 4. do. Output section 27
Then, based on the control signal, the lamp drive circuit 28 ₁ is operated to light a predetermined display lamp 2 ₁ . After the operation unit 4 finishes transmitting the carrier signal, if there is a carrier signal with address data assigned corresponding to the confirmation lamp 5 ₁ ... 5 ₁₆ of the operation unit 4, that is, a return signal from the display unit 1, the mode of the return signal is changed. Based on the data and address data, it is confirmed that the display lamp ₂₁ of a predetermined address is lit, and in accordance with the confirmation judgment, a predetermined input command is created and sent via the parallel data interface 10. and sends it to the computer section 9.
Based on the input command, the computer section 9 turns on the confirmation lamp ₅₁ corresponding to the display lamp ₂₁ via the display interface 13, and resets the display on the display section 8.

In this way, in the operation unit 4, any of the display lamps 2 ₁ to 2 ₁₆ can be turned on, turned off, or blinked using the function key and the numeric keypad, and the operating status of each display lamp 2 ₁ to 2 ₁₆ can be turned on or off. This can be confirmed by checking the status of the confirmation lamps ₅₁ to ₅₁₆ , which turn on, go out, and blink based on the return signal from the display unit 1 side. Incidentally, FIG. 8 shows a flowchart of the computer section 9.

FIG. 9 shows an embodiment of a display system for a gift corner of a department store using the present invention.
₁ , a display unit 1 placed so that it can be clearly seen by customers, and an operation unit ₄₂ equivalent to the above operation unit ₄₁ placed at the product packaging site. and hand over the number tag and the keyboard 7 of the operating unit 4 ₁ .
Enter the number corresponding to the number (this number corresponds to the number of display lamp 2 ₁ ...) and the reception function key (this corresponds to the lighting mode of display lamp 2 ₁ ...). .
The display unit 1 lights up the display lamps 2 _{1 .} . . in response to a conveyance signal from the operating unit 4 ₂ . When a return signal is transmitted from the display unit 1 at the same time as this lighting, the transmitted return signal is received by each operating unit 4 ₁ , 4 ₂ and the corresponding confirmation lamp 5 ₁ . . . lights up. At the packaging site, when the packaging of the product is completed, the operation unit 4 installed at the site
From the keyboard 7 of ₂ , enter the number corresponding to the product and
When the completion function key (flashing mode in this case) is input, a carrier signal is sent from the operating unit ₄₂ to the display unit 1, which causes the display lamp ₂₁ to blink and at the same time sends a return signal. is transmitted to each operating unit 4 ₁ , 4 ₂ to cause the confirmation lamp 5 ₁ . . . corresponding to each blinking display lamp 2 _{1 .} . . to blink. At the reception desk, the display lamp 2 ₁ ... of the display unit 1 flashes to inform the customer that the product packaging has been completed, and at the same time, the confirmation lamp 5 ₁ ... of the operation unit 4 ₁ flashes to inform the customer that the packaging of the product with the corresponding number has been completed. The receptionist will know what you have done. Now, when the customer exchanges the number tag and the product, at the reception desk, he inputs the number and the end function key on the keyboard 7 of the operation unit ₄₁ , and then the display lamp 2 of the number is displayed on the operation unit ₄₁ . A carrier signal is transmitted to turn off the display lamps _{2 1 ,} . The confirmation lamp _{2 1} ... corresponding to the corresponding display lamp 2 ₁ ... of No. 2 is turned off.

Note that it is of course possible to transmit and receive carrier signals between the operating unit 4 and the display unit 1 using signal formats other than those in the above-mentioned embodiments.
The signal format shown in FIGS. 6 and 6 is not limited to this.

Since the present invention includes the operating unit and the display unit configured as described above, the operating unit and the display unit can be easily installed anywhere there is a power line. Even if the number of lamps is increased, only two power lines are needed for wiring, making wiring construction easy.Furthermore, by providing a control mode, it is possible to increase the amount of display information such as turning the indicator lamp on, off, and blinking. Furthermore, it becomes possible to know the status of the display lamp by checking the status of the confirmation lamp provided on the operation unit side by the return signal from the display unit.
This has the effect of being very useful for displaying arrival and departure, calling display, and other confirmation displays.

[Brief explanation of drawings]

Fig. 1 is a schematic block diagram of a conventional example, Fig. 2 is a schematic block diagram of an embodiment of the present invention, Fig. 3 is a circuit block diagram of the same operating unit, and Fig. 4 is a circuit block diagram of the same transmission unit. 5 is a configuration diagram of the carrier signal used in the above, FIG. 6 is a waveform diagram for explaining the carrier signal in the above, FIG. 7 is a circuit block diagram of the display unit in the same, and FIG. 8 is a diagram of the computer in the same as the above. 9 is a schematic diagram of an embodiment of the present invention, 1 is a display unit, 2 ₁ ... is a display lamp,
4 is an operation unit, 5 ₁ ... is a confirmation lamp, and 6 is a power line.

Claims (1)

[Claims] 1.Equipped with a means for receiving a carrier signal to be superimposed on a power line, and a transmitting means for superimposing a carrier signal on a power line, a plurality of indicator lamps are provided, each indicator lamp is given a different number, and the received carrier signal is display control means for controlling a display lamp designated based on address data of the received carrier signal based on mode data of the received carrier signal; and a display control means for creating and receiving return data indicating that the display lamp has performed a predetermined operation. A display unit includes a control operation based on the carrier signal and a return means for returning the carrier signal as a carrier signal by the transmitting means, a means for receiving the carrier signal to be superimposed on the power line, a transmitting means for superimposing the carrier signal on the power line, control means for creating address data and mode data for controlling a predetermined display lamp of the display unit using a number specified by the control mode and a function input for specifying a control mode, and causing the transmission means to transmit the data as a carrier signal; display control means for determining the data of the incoming carrier signal and controlling a confirmation lamp provided in one-to-one correspondence with the display lamp of the display unit in a mode similar to the control mode of the display lamp. A display system using power line transport, characterized by comprising an operation unit.