JPH0128391B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric display panel that displays predetermined characters, symbols, etc. by selectively controlling lamps arranged in a matrix to turn on or off in rows.

As a conventional technology, as shown in Fig. 1,
51-3189 (IC memory type electronic display board), etc.

To briefly explain this, row 13 and column 1
4 to form a matrix, a resistor 16 is connected to the intersection of the row 13 and column 14, a current is passed in the direction from the row 13 to the column 14, and a voltage is generated in the resistor 16. However, the thyristor 17 is triggered.

Moreover, two lamps 15A and 15B are installed on one side of this thyristor 17, and two rectifiers 1 are installed on the other side.
4A and 14B are connected, and a first voltage having a waveform obtained by half-wave rectification of the commercial frequency voltage is applied to both ends of the series circuit consisting of the lamp 15A and the rectifier 14A, and a first voltage having a waveform obtained by half-wave rectification of the commercial frequency voltage is applied to both ends of the series circuit consisting of the lamp 15B and the rectifier 14B. A second voltage having a similar half-wave rectified waveform and having a phase shift of 180 degrees from the first voltage is applied.

Although not shown, in this technology,
The first and second voltages are phase controlled by another thyristor, allowing dimming control of the lamp 15.

Furthermore, in this technique, row 13 and column 14
These are controlled by separate control systems, that is, a row control circuit 11 and a column control circuit 10 (different names in the above-mentioned Japanese Patent Application Laid-Open No.

Further consideration of the above-mentioned prior art shows that as a technical means to optimize the dimming of lamps, phase conversion control of the commercial frequency voltage is carried out, and control of turning on and off of lamps arranged in rows and columns is carried out. The control structure is complicated because it is performed using a separate control system.

Furthermore, JP-A-53-114698, JP-A-53-
As disclosed in No. 34087, during normal times when predetermined characters/symbols, etc. are displayed, as a measure to ensure the normality of the device, it is necessary to detect a broken core of the lamp, or to turn on or off the lamp. It can be said that no checks were made on the control system that controls lights out.

Therefore, as a technical means to eliminate these drawbacks, the present invention aims to simplify the control by narrowing down the lamps arranged in a matrix on the display board to one column control, and also to reduce the core breakage of the lamps. It is an object of the present invention to provide an electronic display panel that performs a confirmation check or a check to confirm the normality of the control system of the lamp and stores the results in a control device, which facilitates maintenance.

Next, the basic configuration of the present invention will be described with reference to FIGS. 2 to 4 and the left side diagram of FIG. 5, and an embodiment embodying the same will be described with reference to FIG. 5 as a whole, including its operation mode.

As shown in FIG. 2, the present invention includes a control device 100
and a display device 200 that is controlled under instructions from the control device 100, and the display device 200 is equipped with a plurality of display boards 210, . . . 210.

The display board 210 is composed of a display board 210A and a display board 210B. As shown in FIG. 3, the display board 210A has lamps 230 arranged in a matrix, and the display board 210B has
As shown in FIG. 3, corresponding to the lamp 230,
A plurality of lamp control circuits 240 for controlling lighting or extinguishing of the lamps 230 are housed.

Next, the details of the configuration of the lamp control circuit 240 will be explained with reference to FIG.

This lamp control circuit 240 includes a data storage circuit 244 that temporarily stores write data, which is information for controlling lighting or turning off of the lamp 230, which is received at an input terminal of the lamp control circuit 240.
a gate circuit 245 that is connected to the output of 44, receives the write data from the output, and is activated when a drive setting input is applied to its control input terminal to close its gate (not shown); , a drive circuit 246 that operates by receiving a control current from the gate of this gate circuit 245, and this drive circuit 246.
A lamp 230 whose one end is connected to the output of
and an AC power source 243, one of which is connected to the power terminal of the drive circuit 246 and the other connected to the other end of the lamp 230;
A first DC power supply 241 that applies an output voltage to the other of the lamps 230, a second DC power supply 242 that is generated by lowering the output of the first DC power supply 241, and the lamp 230 and drive circuit 246. When connected to a connection point and a control signal is applied to its control terminal,
Breaking of the lamp 230 and the drive circuit 2
a monitoring circuit 248 that monitors the operating state of 46 and outputs the monitoring result; and the data storage circuit 244.
a first output terminal for instructing to write the write data; a second output terminal for stopping the output of the gate circuit 245 when the control signal is received; When a control signal is received, the output of the gate circuit 245 is stopped, as in the case of the drive setting, and a third output terminal is provided for supplying a control current to the input of the drive circuit 246. It is composed of a circuit 247.

Note that the power supply used for the data storage circuit 244, gate circuit 245, setting circuit 247, and drive circuit 246 described above is the first DC power supply 241.

Next, details of the configuration of the control device 100 will be explained with reference to the diagram on the left side of FIG. 5.

As shown in FIG. 5, the control device 100 includes a control circuit 110, a stored data output circuit 120 that outputs display data stored in advance based on control instructions from the control circuit 110, and this stored data output circuit. 120 to block address information of a 4-bit binary signal for designating the display board 210,
A display board designation circuit 150 that simultaneously receives signals for all display boards 210, 210, and this display board designation circuit 1.
In addition to receiving the block address information inputted to the display board 50, the display board 210 receives the column address information of a binary signal of 4 bits for specifying a column for each display board 210 from the storage data output circuit 120.
Under the control of the column designation circuit 140 which simultaneously receives information from all the display boards 210, . Write pulse information for instructing the data storage circuit 244 of the control circuit 240 to write the write data, turn-off check information for checking whether the lamp is turned off, and lighting check information for checking whether the lamp is turned on. , read information for checking whether the output of the monitoring circuit 248 of the lamp control circuit 240 is normal, output information of the column designation circuit 140, etc., and display only relevant information as necessary. Each board 210, corresponding display board 2
A switching circuit 180 receives the read information in units of 10 columns and outputs only the corresponding information to the lamp control circuits 240, . . . 240 accommodated in the column; When outputting to the control circuit 240, the monitoring data information corresponding to the read information is sent to the monitoring circuit 130, which receives it from the monitoring circuit 248 of the lamp control circuit 240, and to this monitoring circuit 130. On the other hand, there is a read command circuit 160 that outputs a sampling pulse to instruct to read the monitoring data, and a read command circuit 160 that is in a relative relationship with the light-off check information or light-on check information, and is also used to control the lighting or extinguishment of the lamp 230 during normal times. , a setting circuit 247 of the lamp control circuit 240
Zero-cross pulse generation circuit 1 that outputs a zero-cross pulse signal that is setting information for operating the
It consists of 70.

Next, the operational aspects of the present invention will be explained in detail based on the embodiment shown in FIG. The operational aspects of the present invention include display control, status monitoring, and checking for lighting or turning off.

In order to clarify these operating modes, we will further explain how the control device 100 and the display device 200 are specifically connected in the embodiment, and then explain the above-mentioned operating modes. Explain.

B Connection Overview The control device 100 and the display device 200 are connected directly to the display board 21 of the display device 200 from the storage data output circuit 120 of the control device 100, as shown in FIG.
An LP line for transmitting write data, which is information regarding each 0, each column, and each lamp 230, that is, information regarding each lamp 230, to the data storage circuit 244 of the lamp control circuit 240, and a switching circuit from the storage data output circuit 120. Display board 21 via 180
The information line, that is, the above-mentioned write line, is used to simultaneously transmit information necessary for display control to all the lamp control circuits 240 provided in each lamp 230 housed in the column in each column. A WP line for transmitting a write pulse, which is a setting command for data writing, and a monitoring circuit 2 of the lamp control circuit 240 when the lamp 230 is turned on or off.
The OK line and the NK line are used to transmit ON check information or OFF check information, which is information for checking whether or not there is an output of 48, and the ON check information or OFF check information is connected to the OK line or NK line. At the same time as being transmitted on the NK line, read information, which is information for starting, is transmitted to the monitoring circuit 248 of the lamp control circuit 240 in order to receive response information to the lighting check information or the lighting check information. and an RD line for receiving monitoring data, which is return information for the read information transmitted through the RD line, from the monitoring circuit 248 of the lamp control circuit 240 in the monitoring circuit 130 of the control device 100.
In order to turn on or off the SD line and the lamp 230, one or more circuits among the data storage circuit 244, gate circuit 245, and drive circuit 246 of the lamp control circuit 240 are set to turn on or off the lamp. for transmitting a zero-cross pulse signal, which is necessary setting information, to the setting circuit 247 of the lamp control circuit 240 for control.
Connected with ZP line.

(b) Display control The control device 100 and the display device 200 are connected to the LP line, WP line, OK line, as explained in the connection overview above.
First, the storage data output circuit 120 and the monitoring circuit 130 are activated from the control circuit 110 of the control device 100. Then,
The monitoring circuit 130 includes a lamp 230 formed by the monitoring circuit 248 of the lamp control circuit 240 described above;
It stands by for monitoring the state of the drive circuit 246 or controlling the lamp control circuit 240 to check whether the lamp is turned on or off.

On the other hand, the stored data output circuit 120 outputs preset and stored data to the arithmetic unit (not shown) through the control information lines DT1, DT.
5. The information is transmitted to the display device 200 via DT6 and the aforementioned information lines, LP, WP, and ZP lines.

Next, the procedure for transmitting the various data information mentioned above will be explained.

The data storage circuit 24 of all the lamp control circuits 240 forming a column by the information line LP stores write data, which is lighting information for each lamp 230, which is one display element for displaying characters, symbols, etc.
4, the block address information, which is the designation information for each display board 210, is transmitted to the display board designation circuit 150 as a bundle for each display board 210 in a 4-bit configuration, and for each column of each display board 210. 4 column address information for specifying the column.
Due to the bit configuration, data is simultaneously transmitted as a bundle to the column designating circuit 140 on a column-by-column basis on each display board 210 via control information lines DT6 and DT5, respectively.

At this time, the display board designation circuit 150 immediately transmits the received block address information to the column designation circuit 140 via the control information line DT7.

Then, the column designation circuit 140 uses the 4-bit block address information and column address information as follows.
The information is converted into column-by-column information for each display board 210 and transmitted as a bundle via the control information line DT8 to the switching circuit 180 provided for each display board 210.

With the above procedure, the stored data output circuit 120
When the sending of block address information and column address information is completed, the write data has already been transferred to the information line.
244 of the lamp control circuit 240 corresponding to the column, the write data is sent to the data storage circuit 244. ，
...244, the write pulse information is bundled by the control information line DT1 and sent to the display board 2.
The signal is transmitted to the switching circuit 180 provided every 10 times.

Then, the display board 210 is provided with
This switching circuit 180 receives the column-by-column address information and the write pulse information for each display board 210 converted into the column-by-column information, and is a setting circuit for each lamp control circuit 240 constituting the column. 247, this information is output via the control line WP.

Upon receiving the output, the setting circuit 247 instructs the data storage circuit 244 to write the write data that has already been transmitted.

On the other hand, since the zero-cross pulse generation circuit 170 of the control device 100 always generates a zero-cross pulse signal every time the AC voltage passes through the zero point, this zero-cross pulse signal is always transmitted via the information line ZP to the above-mentioned setting. It is received by circuit 247.

Therefore, by writing the write data in the data storage circuit 244 and closing the gate of the gate circuit 245 by the output of the setting circuit 247 based on the reception of the zero-cross pulse signal, the control current is applied to the output of the gate circuit 245. appears, and the control current causes a current to flow to the gate electrode of the bidirectional silicon-controlled rectifier 246 used as the drive circuit 246, and the bidirectional silicon-controlled rectifier 2
46 is activated.

In this way, when the bidirectional silicon-controlled rectifying element 246 operates, the lamp 230 lights up and the characters, symbols, etc. to be displayed are formed.

C. Status Monitoring This operation mode also applies to the above-mentioned display control, in which some characters or symbols are specified on the display board 210 by the control device 100.
All lamps 230, ...230 in the corresponding column for each,
Bidirectional silicon-controlled rectifier elements 246, .
For each of 246, the state is monitored to see what state it is in at the time of the designation.

First, the switching circuit 180 of the control device 100
reads read information, which is information for status monitoring, from the storage data output circuit 120 via the control information line DT4,
Furthermore, when the control information line DT8 receives address information generated by the column designation circuit 140 based on the column address information and block address information, all the differential operational amplifiers 24 of the corresponding column of the corresponding display board 210
8, the lamp 230 is connected via the information line RD.
Then, the bidirectional silicon controlled rectifier 246 is activated in order to read its operating status.

The differential operational amplifier 248 checks to see how the lamp 230 and the silicon-controlled rectifying element 246 are operating as a result of the activation.

This confirmation method takes the voltage at the connection point between the lamp 230 and the bidirectional silicon-controlled rectifier 246 as the positive input of the differential operational amplifier 248, and supplies it as the negative input of the differential operational amplifier 248. The comparison output (monitoring data) is sent to the monitoring circuit 130 of the control device 100 from the information line SD.

On the other hand, in the monitoring circuit 130 of the control device 100, when the read information is sent out, the read command circuit 160 operates in response to the information, and generates a sampling pulse signal every negative cycle of AC. The sampling pulse signal is sent to the monitoring circuit 130 via the control information line DT9.

Therefore, the monitoring circuit 130 of the control device 100 receives the monitoring data and the sampling pulse signal, and sequentially reads the monitoring data column by column.

The contents of this monitoring data will be further explained in the section on turning on or turning off the light, which will be described later.

(d) Check for turning on or off This operation mode is based on the above-mentioned display control, and sequentially disconnects the lamps 230 in rows on the display board 210 on which some characters or symbols are displayed, and the bidirectional silicon-controlled rectifier 246 This is done to check for short circuits or open circuits.

When performing a light-off check, the light-off check information, block address information, column address information, and read information are sent to the columns on the display board 210 from the storage data output circuit 120 via the switching circuit 180 in the same manner as described above. lamp control circuit 240
It is output to all setting circuits 247, . . . 247.

Then, each setting circuit 247 controls the gate circuit 245 to prevent the control current from flowing to the gate circuit 245 that is supplying the control current to the gate electrode of the bidirectional silicon controlled rectifier 246. Apply a control signal to the input terminal.

This operation turns off the lamps 230 in the column. At this time, the monitoring circuit 130 of the control device 100
, the above-mentioned condition monitoring is controlled, and the monitoring data outputted from the monitoring circuit 248 of the lamp control circuit 240 is read, and the lamp 230 is
or bidirectional silicon controlled rectifier element 24
Know the short circuit of 6.

In this way, all the display boards 210, . . .
210, a confirmation check is performed for each column.

Note that when performing this control, all display boards 210,...
...210, the corresponding column is turned off for only one cycle of the AC frequency voltage. Therefore, there is no effect on the display state.

When performing a lighting check, the lighting check information, block address information, column address information, and read information are sent from the storage data output circuit 120 to the columns of the display board 210 via the switching circuit 180 in the same manner as described above. All configuration circuits 24
7,... Output to 247.

Then, a control current is supplied to the gate electrode of the bidirectional silicon-controlled rectifying element 246 via the setting circuit 247 in response to the reception of the zero-cross pulse signal, and the lamps in the corresponding column are lit for only one cycle of the AC frequency voltage. do.

At this time, by performing the above-mentioned state monitoring control and reading the monitoring data, it is possible to know whether the bidirectional silicon-controlled rectifying element 246 is open.

This concludes the explanation of the operation of the present invention.

As can be seen from the above-mentioned matters, the present invention can control each display board mounted on an electronic display panel in units of rows.

Also, in each row or lamp, the lamp and
Regarding the control system that controls whether to turn on or turn off the lamp, it is possible to check whether the lamp is on or off only in one cycle when the zero-cross pulse signal is output, so the status can be monitored without affecting the lighting status of the display board. can.

Therefore, the present invention can be effectively used to control an electric display panel in which lamps are arranged in a matrix, a signal light installed on a road, and the like.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the prior art, Fig. 2 is a configuration diagram of the present invention, Fig. 3 is an explanatory diagram of the configuration of the display board in Fig. 2, and Fig. 4 is a control for turning on or off the lamp according to the present invention. The left side of FIG. 5 is a block diagram of a lamp control circuit, and the left side of FIG. 5 is a block diagram of a control device according to the present invention, and the overall block diagram is a general block diagram according to an embodiment of the present invention. In the figure, 10 indicates a control device, 110, 12
0,130,140,150,160,170,
Reference numeral 180 indicates a control circuit, storage data output circuit, monitoring circuit, column designation circuit, display board designation circuit, reading command circuit, zero cross pulse generation circuit, and switching circuit controlled by the control device 100, 200 designates a display device, and 210 220 is a display board mounted on the display device 200, and 220 is a display board 210A and a display board 210B.
230 is the lamp, 240 is the lamp control circuit, and 241 to 248 are the first DC power supplies that constitute the lamp control circuit 240, respectively.
A second DC power supply, AC power supply, data storage circuit, gate circuit, drive circuit, setting circuit, and monitoring circuit are shown.

Claims (1)

[Scope of Claims] 1. A control device, and a lamp control circuit for controlling lamps arranged in a matrix to turn on or off lamps arranged in a matrix based on control instructions from the control device, so that a desired set of lamps can be controlled by the lamp control circuit of the lamps. a display device having a plurality of display boards displaying characters, symbols, etc.; display data sent to the lamp control circuit;
A storage data output circuit that presets and stores various control information necessary for display control and outputs the same as appropriate; From this storage data output circuit, 4-bit block address information, which is display board designation information for each display board, is output. and a display board designation circuit that receives the block address information from the display board designation circuit, and 4-bit column address information that is designation information of the columns forming the display board from the storage data output circuit. and a column designation circuit that outputs address information converted into decimal based on the received address information, the output information of the column designation circuit and the lamp control information from the storage data output circuit. Based on this, the NK line is used to check if the lamp is turned off, the OK line is used to check if the lamp is turned on, the WP line is used to write data, and the read information is used to monitor the lamp status of the lamp control circuit. a switching circuit that switches between the RD line and the RD line to output the data to the lamp control circuit; and a switching circuit that outputs the data written to the lamp control circuit, the NK line, and the OK line in synchronization with the AC power supply that lights the lamp and a zero-crossing pulse generation circuit that generates a zero-crossing pulse signal for controlling the lamp for one cycle of an alternating frequency voltage. Board.