JPH07146664A - Display controlling and monitoring device - Google Patents

Abstract

PURPOSE:To increase the efficiency of a maintanance and checking and to prevent the display continuation of information till now while turning off all light emitting elements when a fault in display processing means is generated by isolating and discriminating easily and at early stage display processing means in which a fault is generated. CONSTITUTION:An MPU 32 identifies two channels (monitor starting control data) of a mode-data transmitted from a main control device to a display unit with a TDMA processing and sends out display data and a clock signal generated by a timming generator 35 to a shift register 22 and discriminates a operating state by comparing the display data with a returned display data and transmits a returning data signal in which display fault information and a self-address are added based on next three channels (monitor content transmitting control data) to the main control device and then the main control device isolates the generation of a fault in display parts 15a to 15n based on the address and specifies the display part. Further, when the MPU 32 identifies the display fault, all of light emitting elements in an LED part 30 are turned off through a one-shot multivibrator driving circuit 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display system used in a road traffic control system or the like for displaying information such as characters and figures in a dot matrix. The present invention relates to a display control monitoring device that collects and monitors data transmission such as (time division multiplex transmission).

[0002]

2. Description of the Related Art Recently, a traffic control system has been constructed in which the traffic volume of a vehicle is detected on a highway or the like to grasp the traffic state, and the grasped traffic state is broadcast or displayed on a display device installed on the road. There is. In the display control and monitoring device used in this traffic control system, characters and figures indicating traffic congestion and weather conditions are displayed with a plurality of light-emitting elements (LEDs) arranged in a matrix and lit in a plurality of colors.

FIG. 10 is a block diagram showing a schematic structure of a conventional display control / monitoring device. In FIG. 10, this display control monitoring device has a main control device 2 connected to a host device (host computer) in a traffic control system through a communication interface (I / F) circuit 1. In the system 1 of the main controller 2, there are 16 rows of LEDs that are lit in either red, green or yellow in which red and green are lit at the same time.
Display unit 4 arranged with 6 rows (256 pieces)
a, 4b ... 4n are detachably connected by a cable and a connector (not shown).

Further, in the system 2, the display units 5a, 5b ...
5n are connected. In addition, the display unit N is connected to the system N.
a, Nb ... Nn are connected, and display units 4a to N are provided with serial data of characters and figures output from the main controller 2.
The LED in n is turned on or off integrally in red, green or yellow to display characters and figures.

FIG. 11 is a block diagram showing a detailed structure of each of the display units 4a to Nn. In FIG. 11, a cable F on the input / output side is connected to the display units 4a to Nn by connectors Ta and Tb, and an enable signal for setting the light emission amount of the LED is input to the drive circuit 8 through the buffer 6a. Further, a latch signal for switching the screen is input to the shift register 7 through the buffer 6b.

The clock signal is also input to the shift register 7 through the buffer 6c. Further, a data signal indicating whether each LED is turned on or off is input to the shift register 7 through the buffer 6d. The shift register 7 outputs data for turning on or off the LEDs, and this output is arranged through the drive circuit 8 in 16 rows and 16 rows (256 pieces) of LEDs having built-in light emitting elements of two colors, for example, red and green. It is input to the LED unit 9 that is turned on. The cable F and the connectors Ta and Tb may be provided with connection lines, connection terminals, etc. for power supply voltage and ground which are not shown.

In FIG. 10, the system 1 of the main controller 2 is
Display units 4a to 4n and 5a to 2 and N, respectively.
5n, Na to Nn are connected, and the final stage display unit 4
The data signals from n, 5n and Nn are returned to the main controller 2, respectively. The failure of the display units 4a to Nn is detected by comparing the returned data signal with the sending data signal corresponding to the returning data signal. The details of the failure are transmitted to the host device through the communication I / F circuit 1. This failure occurs when the display units 4a to 4n, 5a to 5n, and Na to Nn connected to the systems 1, 2 and N are continuously connected by the cable F, the connectors Ta and Tb are disengaged, and the processing path is disconnected. There is a malfunction of the shift register 7 which is a part.

[0008]

In the conventional display control and monitoring apparatus as described above, the display units (4a to 4N) are connected to each system 1, 2 and N by using cables and connectors.
In one of n), if the connector is disconnected, the shift register 7 path malfunctions, etc., the system (1, 2,
All of the display units (4a to Nn) in N) or all of the display units connected so that the data signal is transmitted from the failed display unit malfunction. In this case, there is a disadvantage that the display unit (4a to Nn) in which the data signal is not returned to the main control device 2 and the failure has occurred, that is, the so-called separation time becomes long and maintenance and inspection take time.

Furthermore, if the display unit (4a to Nn) is malfunctioning, for example, if the shift register 7 and the drive circuit 8 which are part of the processing path in FIG. Keeps lighting up. In this case, if the past traffic congestion and weather information is continuously lit and displayed, the driver will be confused by the old display information. For example, even though it is clear now due to an obstacle,
There is a drawback that the information on the rainy weather up to now continues to be lit and displayed, or that the traffic light is continuously lit and displayed even though the traffic jam is resolved.

The present invention solves the above-mentioned drawbacks of the prior art, facilitates continuous connection of a plurality of display units, and causes a failure in a host device that controls the device from a remote location. The generated display unit can be easily and early cut and discriminated to improve the efficiency of maintenance and inspection, improve the display quality by matching the light emission timing of the light emitting elements, and reduce the power consumption. An object of the present invention is to provide a display control / monitoring device capable of turning off all the light emitting elements when a failure occurs in the display unit so as not to continue displaying information until now.

[0011]

In order to achieve the above object, a display control and monitoring apparatus according to claim 1 receives display data by data transmission from a transmission line, and displays the display data based on the processing of the display data. A plurality of display processing means having a processing path for blinking a plurality of light-emitting elements constituting the same and a self-address is set, and a determination means for determining an operation failure of the processing path, and each determination means. The communication control means for transmitting the failure occurrence data including the self address to the connection line by serial data transmission according to the determination of the operation failure of the processing path, and the operation failure based on the address of the failure occurrence information received through the connection line. And a display control identification unit for identifying the display processing unit in which the occurrence has occurred.

According to another aspect of the display control / monitoring apparatus of the present invention, display data is input by serial data transmission including an address from a transmission line, and a plurality of light emitting elements forming a display section are blinked based on the processing of the display data. A plurality of display processing means each having a processing path for setting the self-address, receiving means for receiving an enable signal defining the light emitting period of the light emitting element from the transmission line, and display data from the processing path from the receiving means. Driving means for outputting to the display unit at a timing based on the enable signal, discrimination means provided for each display processing means and discriminating an operation fault of the processing path, and discrimination means provided for each discrimination means for discriminating an operation fault of the processing path Communication control means for sending fault occurrence data including self address to the transmission line by serial data transmission, A display control identifying means for identifying the display processing means in which the operation failure has occurred based on the address of the failure occurrence information received through the communication, and for sending an enable signal to the transmission line for each of the plurality of display processing means I am trying.

In the display control monitoring apparatus according to the present invention, the determining means determines the operation failure of the processing path in response to the input of the monitoring start control data transmitted from the display control identifying means to the communication control section, and The communication control means sends the determination result of the determination means to the display control identification means in accordance with the monitoring content transmission control data transmitted from the display control identification means.

In the display control monitoring apparatus according to the present invention, the discriminating means generates data to be transmitted based on the input of the display data and transmits the data to the processing path, and the processing means to process and output the data. It is configured to include a comparison / determination unit that compares the output data and the transmission data to determine the operation failure of the processing path.

In the display control monitoring device according to the present invention, the display control identification means gives a sound when the occurrence of a failure in the processing path is identified, and / or displays a screen so as to indicate the processing path in which the failure has occurred. And a notification display means.

In the display control monitoring apparatus according to the sixth aspect, the display control identification means is provided with a storage means capable of storing the data transmitted from the communication control section.

In the display control monitoring apparatus according to the seventh aspect, the display control identification means comprises a transmission means for transmitting the display data and the failure occurrence data to the host device.

In the display control monitoring apparatus according to claim 8, when the discriminating means determines that an operation failure has occurred in the processing path, all the light emitting elements of the display section of the display processing means provided with the discriminating means are turned off. It is configured to include an extinguishing control means for turning on.

In the display control monitoring apparatus according to claim 9, when one of the intermittent signals output by the determining means upon the determination that the operation failure of the processing path is generated is input to the light-off control means, the next input is made. A one-shot multivibrator is provided which supplies an output signal set to a time constant exceeding the signal to the drive means to turn off all the light emitting elements of the display section of the display processing means.

[0020]

According to the display control and monitoring device of the present invention, the operation failure of the processing path to which the display data is input is discriminated for each display processing means, and the display processing means in which the operation failure occurs. The failure occurrence data including the address is sent to the display control identifying means, and the display processing means in which the operation failure has occurred is identified based on the address. Therefore, even if a plurality of display processing means are continuously connected, it becomes easy, and the display processing means in which a failure has occurred can be easily and early discriminated and determined.

According to a second aspect of the present invention, in the display control monitoring device, the operation failure data of the processing path to which the display data is input by serial data transmission including the address is sent to the display control identification means by the serial data transmission to the transmission line together with the self address. Then, the display processing means in which the operation failure has occurred is identified based on the address. Further, display data is sent to the display unit based on an enable signal that determines the light emission start timing of the light emitting elements of the display unit for each of the plurality of display processing means. Therefore, the plurality of display processing means can be easily connected continuously, and the display processing means in which a failure has occurred can be easily and early discriminated and determined, and the light emission timings of the light emitting elements match.

According to another aspect of the present invention, the display control and monitoring device gives a sound when the occurrence of a failure is identified, and / or displays it on the screen so as to show the processing route in which the failure has occurred. The display control monitoring device according to the sixth aspect can store the data transmitted from the communication control unit. The display control monitoring device according to claim 7 transmits the display data and the failure occurrence data to the host device. Therefore, in the host device that controls the device from a remote location or the like, the display processing means in which the failure has occurred is early discriminated and determined.

The display control monitoring device according to claims 8 and 9 comprises:
When the discriminating means discriminates the operation failure of the processing path, the driving means is driven to turn off all the light emitting elements. At this time, when one signal indicating the operation failure is inputted, the next input signal An output signal set to a time constant exceeding 0 is supplied to the driving means to turn off all the light emitting elements of the display section of the display processing means. Therefore, it is possible to prevent the information display up to now from continuing, and to prevent the light emitting element from turning on and off when a failure occurs.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the display control and monitoring device of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the first embodiment. In FIG. 1, the display control and monitoring device includes a serial display data signal of characters and figures that are traffic information, an enable signal that defines a light emission period for setting the light emission amount of an LED, a latch signal for screen switching, and a clock. A main controller 9 is provided as a display control identifying means for transmitting and receiving a signal and a return data signal which is display failure data by TDMA (time division multiplex transmission) processing, and sending out a power supply voltage for display and control. There is.

Further, the main controller 9 receives a display control signal and a display data signal from a host device (host computer) (not shown) through the transmission line L, and transmits information relating to a failure to the host device. (I / F) circuit 10, memory 11 for storing information related to failure occurrence, and indicator 12 for displaying the content of operation failure
And have.

The main control unit 9 is detachably connected to the cable Fa with a connector, and is arranged in a matrix.
The ED has display units 14a, 14b, ... 14n of the system 1 which are lit in red, green or red, green or yellow to display characters or figures such as traffic information. Similarly, it is detachably connected to the cable Fb with a connector to display characters and figures such as traffic information on the display units 14a to 14n of the system 1.
Display unit 16 of system 2 that integrally displays with
a, 16b ... 16n and a cable Fn which are detachably connected with a connector to display characters and figures such as traffic information on the display units 14a to 14n and 16a to 16n of the systems 1 and 2.
Display unit 18 of system N that integrally displays with
a, 18b ... 18n.

Each of the display units 14a to 14n has 16 rows and 16 rows (256 pieces) of LEDs that are lit in red, green or yellow in which red and green are lit at the same time. 15n for displaying figures, an enable signal from the main controller 9, a latch signal, a clock signal, and a monitor control signal for controlling the determination of occurrence of a failure, and return data which is display failure data. It has display processing means 17a, 17b ... 17n provided in the MPU 32, which will be described later, having a communication control means for transmitting a signal to the main control device 9 through the cable Fa by TDMA (time division multiplex transmission).

The display units 16a to 16n of the system 2 connected by the cable Fb and the display units 18a to 18n of the system N connected by the cable Fn are also provided with a display unit and display processing means (not shown), respectively. There is.

FIG. 2 is a block diagram showing the detailed construction of the display units 15a to 15n and the display processing means 17a to 17n. The display units 16a to 16n and the display unit 1
The same applies to the configurations of the display unit and display processing means (not shown) in 8a to 18n. In FIG. 2, the display unit 14a-
An input / output side cable Fa of 14n is connected by a connector Ta.

The display units 15a to 15n are supplied with enable signals, latch signals, clock signals, and display data signals from the display processing means 17a to 17n, respectively. The display processing means 17a to 17n have an MPU 32, and this MP
U32 has a determination means for determining the occurrence of a failure in the processing path of the display units 15a to 15n. Display units 15a to 1
5n has a shift register 22 to which various signals from the display processing means 17a to 17n are input, and outputs display data of lighting or extinguishing to the LED, and MPU 32 (discriminating means) of the display processing means 17a to 17n. Return display data to. The processing route is the display processing means 17a.
The path of the display data from the MPU 32 of ~ 17n to the shift register 22 is shown.

The display units 15a to 15n are provided with a drive circuit 2 as a drive means to which the display data signal from the shift register 22 and the enable signal from the MPU 32 are input.
3 and a drive data signal from the drive circuit 23 are input, for example, an LE having a built-in light emitting element of two colors of red and green.
D has 16 rows and 16 LED sections 30 arranged in 16 rows (256 pieces).

The display processing means 17a to 17n send an enable signal, a latch signal and a clock signal to the cable F, respectively.
The operation of the processing path of the display units 15a to 15n is determined based on the monitoring control signal from the main controller 9 and the return data signal which is the display failure data of this result is transmitted to the TDMA (time division multiplexing). Microprocessor (MPU) 32 for processing by transmission), ROM 34 in which a program for communication control and self addresses of the display units 14a to 14n are stored, and RAM 3 for working
3 and 3.

Further, in order to judge the occurrence of a failure in the display portions 15a to 15n, a data generating and transmitting means for generating a clock signal and a data signal based on a supervisory control signal from the main control unit 9 and transmitting them to the shift register 22 through the MPU 32. Timing generator 35 and cable Fa
And a transmission / reception interface (I / F) circuit 36 such as RS-485 interface processing for receiving a data signal from the device and transmitting a return data signal which is display failure information. The connector Ta to which the cable Fa is connected is also provided with a power supply voltage (not shown), for example, a control voltage of 5 volts (V), a display voltage of 3 V, and a grounding connection line and a connection terminal.

FIG. 3 is a circuit diagram showing a detailed configuration example of the shift register 22 and the drive circuit 23 in the display units 15a to 15n. In FIG. 3, the shift register 22 is MP
The display data Ta in the serial data signal of characters and figures, which is the traffic information captured by the U32 through the transmission / reception interface (I / F) circuit 36, the latch signal Dl for switching the screen, and the clock signal Cka are transferred, and Processing display data D1, D2, D3 shown in FIG.
A flip-flop (F / F) circuit that outputs Dn is connected and configured.

The drive circuit 23 is provided with an inverter supplied with an enable signal De for defining the light emitting period of the LED section 30 taken in by the MPU 32 through the transmission / reception interface (I / F) circuit 36, and the shift register 22.
AND circuit to which the display data from the F / F circuit is input is connected, and further, the inverter to which the display data from the AND circuit is input and the LEDs of the LED section 30.
Is connected with a resistor for driving the device with a constant current.

Next, the operation of the first embodiment will be described. The main controller 9 receives the display control signal, which is input from the host device through the communication I / F circuit 10 and the serial data signal of the character and the figure indicating the traffic information, from the lines 1 to N.
Of the cables Fa to Fn. At the same time enable signal, latch signal, clock signal, display unit 1
A supervisory control signal and a power supply voltage for controlling the determination of occurrence of a fault in 4a to 14n are sent.

FIG. 4 is a diagram showing a format of a data signal transmitted by the TDMA processing. In FIG. 4, this format includes a start data part, a mode data part corresponding to the monitor control signal, a source address data part, a destination address data part, and a display data part. The mode data part, the source address, and the destination address are, for example, 1 byte each, and the display data is 64 bytes.

The mode data section comprises three channels (CH), and one channel (CH) controls display of characters and figures indicating traffic information, that is, a normal display operation is performed by the display unit 1.
Normal display operation control data for instructing 4a to 18n is stored. Channels 2 and 3 correspond to the supervisory control signal, and channel 2 (CH) is the display processing means 15a to 15n in the display units 14a to 18n.
Stored is the monitoring start control data for the main controller 9 to determine whether the operation of n is normal or a failure has occurred. The three channels (CH) are MPU signals indicating the processing result when the display processing means 17a to 17n process the failure occurrence determination in the display units 14a to 18n based on the monitoring control data.
The monitoring content transmission control data is stored so that the instruction 32 is transmitted through the transmission / reception I / F circuit 36 and the cable Fa.

The data signal of this format is TDMA
It is transmitted by time division in the processing. That is, channels 1, 2, and 3 (normal display operation control data, monitoring start control data, monitoring content transmission control data) of the mode data section are not transmitted as data signals at the same time but are transmitted from the main control device 9 in a time division manner.

FIG. 5 shows the display processing means 17a to 17a shown in FIG.
17n is a timing chart showing processed signals in the display units 15a to 15n shown in FIG. Display unit 1 through cable Fa
The enable signal, the latch signal, the clock signal, and the data signal transmitted to 4a to 18n are received by the display processing means 17a to 17n through the connector Ta in FIG. 2, and the display processing means 17a to 17n as shown in FIG. The data signal (display data) Da, the latch signal Dl, and the clock signal Cka are sent to the display units 15b to 15n. Further, the enable signal De is sent to the drive circuit 23.

In the display units 15b to 15n, the shift register 22 causes the drive circuit 2 to output the LED turn-on data or turn-off data based on the display data according to the display data signal in FIG.
Output to 3. An enable signal De defining the light emitting period of the LED is input to the drive circuit 23, and characters and figures based on the display data from the shift register 22 are displayed at timings based on the enable signal De.
The LED unit 30 in 15n is turned on or off for display.

At this time, the LED portions 30 of the display portions (15a to 15n) of the display units 14a to 18n blink so that characters or figures such as integrated or continuous traffic information are displayed as a whole.

Next, from the main controller 9 to the display unit 14a
The case where the monitoring control of ~ 18n is performed will be described. The MPU 32 in the display units 14a to 18n identifies two channels (monitoring start control data) of the mode data portion in the data signal shown in FIG. The discriminating means of the MPU 32 outputs the 512-bit display data Db and the clock signal Ckb corresponding to the lighting information of the green or red light emitting element, which is generated by the timing generator 35 as the data generating and transmitting means, to the display data Da and the clock signal Cka. Is sent to the shift register 22 as pseudo display data instead of. Display data Do output from the shift register 22
Is input to the discriminating means of the MPU 32. The comparing means of the judging means compares the sent display data Da with the shift register 2
The display data Do returned after passing 2 is compared to determine whether the shift register 22 operates normally.

Failures in the shift register 22 include, for example, malfunction of the shift register 22 and MPU3.
There is a failure in the processing path from 2 to the shift register 22. That is, the display processing means 17a to 17n and the display unit 15
There is disconnection of the connector when connecting a to 15n with a cable or connector, contact failure of the connection terminal (contact), and the like.

Return data, which is the display failure data of the determination result, is sent to the main controller 9. In this case, the main control unit 9 controls the 3 of the mode data portion in the data signal shown in FIG.
Channels (monitoring content transmission control data) are transmitted to the cable Fa by TDMA processing, and these three channels (monitoring content transmission control data) are transmitted to M in the display units 14a to 18n.
PU 32 identifies. The MPU 32 displays the display unit 14a to 1 stored in the ROM 34 in advance together with the display failure information.
The return data signal to which the self address of 8n is added is sent to the main controller 9 through the transmission / reception I / F circuit 36 and the cable Ta.

The main controller 9 identifies and specifies the display failure data in the return data sent through the cable Ta and the failure occurrence in the display units 15b to 15n based on the address. That is, the malfunction of the shift register 22 in the display portions 15b to 15n and the shift register 2
Recognize the occurrence of a failure in the second processing path. The information of the display units 15a to 15n, which has determined the occurrence of the failure, is stored in the memory 11 under the control of the main controller 9, and an alarm sound is emitted by the display device 12 to notify the user, and the display unit 1 in which the failure has occurred
The display units (14a to 18n) in which a failure has occurred are displayed on the screen by showing numbers 5a to 15n or lines 1 to N and the like. Further, the information of normality or failure occurrence of the display units 14a to 18n is transmitted to a host device (not shown) through the communication I / F circuit 10 and the communication line L. The host device can grasp the operation status of the display control monitoring device installed at a remote place.

In this case, since the data signal and the return data are transmitted by TDMA processing, as described above,
It is not necessary to provide a connection line for returning data, and continuous connection between the display units 14a to 18n becomes easy. Further, since the display unit (14a to 18n) in which the failure has occurred can be identified early and surely, maintenance and inspection are facilitated.

Next, the second embodiment will be described. In the second embodiment, the systems 1, 2, ... N from the main controller 9 are
The enable signal transmission timing is determined for each. FIG. 6 is a block diagram showing the configuration of the second embodiment. In FIG. 6, the display processing means 17a to 17n in the display units 14a to 18n are provided with a reception interface (I / F) circuit 40 connected to the enable signal transmission line in the cable Fa through the connector Ta. The other structure is the same as that of the first embodiment.
32, ROM 34, RAM 33, timing generator 35, and transmission / reception I / F circuit 36. The display units 15a to 15n have the same configuration as that of the first embodiment, and have a shift register 22, a drive circuit 23, and an LED unit 30.

Next, the operation of the configuration of the second embodiment will be described. The operations of the display processing means 17a to 17n and the display units 15a to 15n are basically the same as those of the first embodiment. Here, as shown in FIG. 7, the enable signal from the main control unit 9 changes the transmission timings t1 and tn for each system 1, 2, ... N. The enable signal is received by the reception I / F circuit 40 through the cable Fa and the connector Ta, and is transmitted through the inverter shown in FIG. 3 in the drive circuit 23 in the display units 15a to 15n.
It is input to the D circuit. The amount of light emitted from the LED section 30 is determined by the enable signal De.

In this case, the enable signal De is the system 1,
The transmission timings t1 and t2 change every 2 ... N, and the transmission timings t1 and t2 are supplied with the display data to the drive circuit 23 in consideration of the shift in the transmission time of the data signal to the systems 1, 2 ... N. It is decided to match the timing to be done. Other operations are the same as the operations in the first embodiment.

As a result, when the power is turned on, the drive circuit 2
The lighting of all the LED sections 30 based on the display data supplied to No. 3 is determined based on the enable signal supplied through the reception I / F circuit 40. That is, system 1,2 ...
The lighting timing of the LED unit 30 at N is the same. Therefore, during display control, the LED section 30 does not light up with the maximum light emission amount, and an excessive rush current does not flow. In addition, since there is no difference in the amount of light emitted from each LED unit 30 in the display units 14a to 18n, blinking when visually recognizing displayed characters and figures is reduced. In addition,
Other advantages are similar to those of the first embodiment. Note that the enable signal does not need to be transmitted by time division multiplex transmission as in the present embodiment, and a transmission line according to another transmission method is provided separately,
It may be connected to each display unit.

Next, the third embodiment will be described. In the third embodiment, when a failure occurs in the display unit, all the light emitting elements are turned off to prevent the past traffic congestion and weather information from being continuously displayed and displayed. Figure 8
FIG. 7 is a block diagram showing a configuration of a third embodiment. 8, this example is based on the display units 15a to 15n shown in FIG.
A one-shot multivibrator 50 is provided for stopping the sending of the lighting signal from the drive circuit 23 to the LED unit 30 when a failure occurs in the shift register 22 in the above. This one-shot multi-vibrator 50
Is provided with a resistor R and a capacitor C for delaying an output signal from one failure occurrence signal intermittently input from the MPU 32 to a width exceeding the next failure occurrence signal and setting a time constant thereof. ing. Further, the lighting drive circuit 23 is connected to an AND circuit having three input terminals to which the enable signal De, the shift register 22, and the data from the one-shot multivibrator 50 are input. Other configurations are similar to those of FIG.

Next, the operation of the third embodiment will be described. The enable signal, the latch signal, the clock signal and the data signal which are respectively transmitted to the display units 14a to 18n through the cable Fa are received by the display processing means 17a to 17n through the connector Ta, and the data signals are received from the display processing means 17a to 17n. (Display data) D
a, the latch signal Dl, and the clock signal Cka are displayed on the display unit 15.
b to 15n. Further, the enable signal De is sent to the drive circuit 23.

In the display units 15b to 15n, the shift register 22 outputs the LED turn-on data or turn-off data based on the display data to the drive circuit 23. An enable signal De designating the amount of light emitted from the LEDs is input to the drive circuit 23, and based on the enable signal De, characters and figures based on the data signal from the shift register 22 are displayed on the LED unit 30 in the display units 15a to 15n. Turns on or off,
Display units (15a-) in the display units 14a-18n
15n), the LED unit 30 turns on and off the characters and figures such as traffic information integrally and continuously, and the images are displayed one by one.

In this case, when a failure occurs in which the display data Do is not returned from the shift register 22 to the MPU 32, the MPU 32 causes the one-shot multi-vibrator 50.
As shown in FIG. 9A, the fault occurrence signal is intermittently sent to the input terminal (D) of. Each time this intermittent failure occurrence signal is input, the one-shot multivibrator 50
The signal is delayed from the time constant of the resistor R and the capacitor C and sent from the output terminal (Q). This delay delays the output signal from one fault occurrence signal input intermittently to a width exceeding the next fault occurrence signal. The lighting drive circuit 2 outputs the delayed signal.
Input to the AND circuit of 3 and LE through this AND circuit
The signal transmission to the D section 30 is stopped, and all the LED sections 30 are
Turns off.

In this case, the one-shot multivibrator 50 delays an output signal having a width exceeding the next failure occurrence signal from one failure occurrence signal intermittently input from the output terminal (Q). Even if the fault occurrence signal is erroneously operated to indicate lighting, a signal for turning off the LED unit 30 is sent to the AND circuit of the lighting drive circuit 23, so that the light emitting element of the LED unit 30 is turned on and off when a fault occurs. Blinking can be prevented, and the LED section 30 is surely turned off.

As a result, the traffic congestion and weather display information that has been displayed until now does not continue to light up, and the driver will not be confused by the old display information. For example, although the weather is currently clear due to an obstacle, information about rainy weather continues to be displayed with the display unit (15a to 15n) lit up until now. Is not lit up and continues to be displayed.

[0058]

As is apparent from the above description, the display control monitoring device according to the first aspect of the present invention determines the operation failure of the processing path to which the display data is input for each display processing means. ing. Since the failure occurrence data including the address of the display processing means in which the operation failure has occurred is transmitted to the display control identification means by the connection line, and the display processing means in which the operation failure has occurred is identified based on the address, a plurality of The continuous connection of the display processing means becomes easy, and the display unit in which a failure has occurred can be easily and early separated and determined,
This has the effect of improving the efficiency of maintenance and inspection.

According to another aspect of the present invention, there is provided a display control / monitoring device, which sends operation fault data of a processing path, to which display data is input by serial data transmission including an address, to a transmission line together with its own address, and based on the address. The display processing means in which the operation failure has occurred is identified. Further, since the display data is sent to the display unit based on the enable signal that determines the light emission start timing of the plurality of light emitting elements of the display unit for each of the plurality of display processing units, continuous connection of the plurality of display units becomes easy, In addition, the display unit in which the failure has occurred can be easily and early separated and discriminated to improve the efficiency of its maintenance and inspection, and the light emission timings of the light emitting elements are matched to improve the display quality, and all the display units are improved. This has the effect of reducing the cost of the power supply that supplies all the power supplies.

The display control / monitoring apparatus according to the fifth aspect of the present invention can display a screen to indicate by sound when the occurrence of a failure is identified and / or indicate a processing route in which the failure has occurred. The display control monitoring device according to the sixth aspect can store the data transmitted from the data communication control unit. The display control monitoring device according to claim 7 transmits the display data and the failure occurrence data to the host device. Therefore, in the host device that controls the device from a remote location or the like, there is an effect that the display processing means in which the failure has occurred is early discriminated and discriminated.

The display control monitoring device according to claims 8 and 9 is
When the discriminating means discriminates the operation failure of the processing path, the driving means is driven to turn off all the light emitting elements. At this time, when one signal indicating the operation failure is inputted, the next input signal Since the output signal set to a time constant that exceeds the above is supplied to the driving means to turn off all the light emitting elements of the display unit of the display processing means, it is possible to prevent the information display up to now from continuing. In addition, it has an effect that it is possible to reliably prevent blinking in which the light emitting element is turned on and off when a failure occurs.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration in a first embodiment of a display control monitoring device of the present invention.

FIG. 2 is a block diagram showing a detailed configuration of a display unit and a display processing unit in FIG.

3 is a circuit diagram showing a detailed configuration example of a shift register and a drive circuit of the display section shown in FIG.

FIG. 4 is a diagram showing a format of a data signal transmitted by TDMA processing in the embodiment.

FIG. 5 is a timing chart showing processing signals and timings of the display processing means and the display unit in the embodiment.

FIG. 6 is a block diagram showing an overall configuration of a second embodiment.

FIG. 7 is a timing chart showing an enable signal transmission timing in the second embodiment.

FIG. 8 is a block diagram showing a configuration of a third exemplary embodiment.

9 is a timing chart showing operation timings of the one-shot multivibrator shown in FIG.

FIG. 10 is a block diagram showing a schematic configuration of a conventional display control monitoring device.

FIG. 11 is a block diagram showing a detailed configuration of a display unit in a conventional example.

[Explanation of symbols]

9 Main control devices as display control identification means 14a to 18n ... Display units 15a to 15n
Display section 17a to 17n ... Display processing means 22 Shift register 23 ... Drive circuit as drive means 30 LED section 32 ... MPU 35 as discrimination means and communication control means 35 Timing generator 36 ... Transmission / reception I /
F circuit 50 One-shot multivibrator R Resistor C ... Capacitor

Claims (9)

[Claims] 1. A plurality of display data are input by data transmission from a transmission line, and a plurality of light-emitting elements forming a display section are blinked on the basis of the processing of the display data and self-addresses are set. Display processing means, discrimination means provided for each of the display processing means and for discriminating an operation failure of the processing path, and provided for each of the discrimination means, and a self-address is provided along with the discrimination of the operation failure of the processing path. Communication control means for sending out fault occurrence data including serial data transmission to the connection line, and display control identification means for identifying the display processing means in which the operation failure has occurred based on the address of the fault occurrence information received through the connection line. And a display control monitoring device. 2. Display data is input by serial data transmission including an address from a transmission line, and a processing path for blinking a plurality of light emitting elements forming a display portion based on processing of the display data is provided and self-address is provided. A plurality of set display processing means, a receiving means for receiving an enable signal defining the light emitting period of the light emitting element from the transmission line, and a display data from the processing path based on the enable signal from the receiving means. Drive means for outputting to the display section, a determination means provided for each of the display processing means and for determining an operation failure of the processing path, and a determination means provided for each of the determination means for determining an operation failure of the processing path. Along with this, communication control means for sending fault occurrence data including self address to the transmission line by serial data transmission, Display control identifying means for identifying the display processing means in which the operation failure has occurred based on the address of the failure occurrence information received through the line, and sending an enable signal to the transmission line for each of the plurality of display processing means. Display control monitoring device. 3. The determination means determines the operation failure of the processing path in response to the input of the monitoring start control data transmitted from the display control identification means to the communication control section, and the monitoring transmitted from the display control identification means. 3. The display control monitoring device according to claim 1, wherein the communication control means sends the determination result of the determination means to the display control identification means along with the content transmission control data. 4. The discriminating means compares the data generating and transmitting means for generating the transmission data based on the input of the display data and transmitting the data to the processing path, and the output data processed and output in the processing path and the transmission data. 4. The display control monitoring device according to claim 1, further comprising: a comparison / determination unit that determines an operation failure of the processing path. 5. The display control identification means includes a notification display means for notifying by sound when a failure occurrence in the processing path is identified and / or displaying on the screen so as to show the processing path in which the failure has occurred. 5. Any one of claims 1 to 4
Display control monitoring device described. 6. The display control monitoring device according to claim 1, wherein the display control identification unit includes a storage unit capable of storing the data transmitted from the communication control unit. 7. The display control monitoring device according to claim 1, wherein the display control identification means includes a transmission means for transmitting the display data and the failure occurrence data to a higher-level device. 8. An extinguishing control means for extinguishing all the light emitting elements of the display unit of the display processing means provided with the discrimination means when the discrimination means judges the occurrence of the operation failure of the processing path. The display control monitoring device according to any one of claims 1 to 7, characterized in that: 9. An output set to a time constant exceeding the next input signal when one of the intermittent signals output by the determination means upon occurrence of an operation failure in the processing path is input to the turn-off control means. 9. The display control monitoring device according to claim 8, further comprising a one-shot multivibrator which supplies a signal to the driving unit to turn off all the light emitting elements of the display unit of the display processing unit.