JP3297893B2 - Information display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information display device,
In particular, the present invention relates to an information display device that displays various kinds of information composed of patterns such as characters and figures by light emitting diodes forming a vertical and horizontal matrix.

[0002]

2. Description of the Related Art In general, this type of information display device has a configuration in which a display section is divided into a plurality of display units as shown in FIG. 8 in consideration of maintainability, manufacturing efficiency and the like. FIG. 8 is an explanatory diagram showing a general information display device.

In FIG. 1, reference numeral 1 denotes an information display device, and 2 denotes a display unit comprising a large number of light emitting diodes arranged as a display element in a matrix. The display unit 2 includes a plurality of display units 2. Reference numeral 81 denotes a display unit of the display unit 2 in which a failure has occurred for some reason, and is used in the following description.

FIG. 9 is an explanatory view showing the structure of the display unit 2. In FIG. 9, reference numeral 3 denotes light emitting diodes (hereinafter, referred to as LEDs) arranged in a matrix as display elements. In this case, one display unit 2 has 256 dots arranged in a 16 × 16 dot matrix.
It is composed of three LEDs 3.

Conventionally, such an information display device 1 is configured to transfer display data to be displayed on each display unit by serial display data. FIG. 12 is a block diagram showing a conventional information display device 1. In FIG. 12, reference numeral 10 denotes a control circuit for controlling each display unit 2, and a display symbol storage circuit 12 for storing a plurality of display symbols as display data. And a display symbol processing circuit 11 that reads out predetermined display data from the display symbol storage circuit 12, divides the display data, and outputs the divided display data to the corresponding display units 2 as serial display data.

The LED 3 of the display unit 2 is driven in accordance with the serial display data supplied from the control circuit 10 via the terminal 23 and the output enable signal supplied via the terminal 24.

FIG. 12 is a block diagram showing a display drive circuit inside a conventional display unit 2. In FIG.
Reference numeral 1 denotes a shift register circuit that outputs serial display data input from a terminal 23 as parallel display data and sequentially outputs serial display data to the next stage. Reference numeral 22 denotes a shift register circuit 21 based on an output enable signal input from a terminal 24. And a latch / drive circuit that drives the LED 3 in accordance with the parallel display data from the CPU.

If each display unit 2 has a 16 × 16 dot matrix LED 3 as shown in FIG. 9, each display unit 2 has 16 shift register circuits 21 and 16 latch / drive circuits 22 each. Thus, each latch / drive circuit 22 is provided with 16 LEDs 3.

Now, the display data read from the display symbol storage circuit 12 is divided by the display symbol processing circuit 11 based on the display area corresponding to each display unit 2, converted into serial data, and then converted into serial data. Display unit 2
Sent to In addition, control signals (not shown) such as a shift signal for shifting the serial display data and a latch signal for conversion to the parallel display data are output from the display symbol processing circuit 11 in synchronization with the serial display data. Is done.

The shift register circuit 2 of each display unit 2
Reference numeral 1 reads serial display data supplied via a terminal 23 based on a shift signal, sequentially shifts the serial display data to the next-stage shift register circuit 21, and converts the read serial display data into parallel display data.

The latch / drive circuit 22 latches the parallel display signal output from the shift register circuit 21 in response to the latch signal, and then latches in response to the output enable signal supplied via the terminal 24. Each LED 3 is driven based on the parallel display signal.
As a result, the symbols divided by the display symbol processing circuit 11 are displayed on the LED 3 of each display unit 2.

[0012]

Therefore, in such a conventional information display device, a large number of shift register circuits 21 are provided in each display unit 2 so that serial display data corresponding to each LED 3 is transferred. Therefore, when a failure occurs in any of the shift register circuits 21 or the wiring for transferring serial display data, the serial display data is not transferred to the shift register circuit 21 at the subsequent stage after the failure, and the corresponding LED 3 has a symbol. Was not displayed properly.

Further, depending on the installation environment of the information display device, etc.,
When a connector or the like between the control circuit 10 and the display unit 2 is deteriorated and a connection failure occurs, there is a problem that no pattern is displayed on the display unit 2 corresponding to the connector. Display unit 81 shown in
If a failure occurs, the symbol displayed on the information display device 1 is difficult to recognize until the maintenance is exchanged, and there is a problem that the displayed content may be erroneously recognized.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and provides a highly reliable information display device capable of accurately displaying the original information content even when a failure occurs in any of the display units. It is intended to provide.

[0015]

In order to achieve the above object, an information display device according to the present invention comprises: an abnormality detecting means for individually detecting an abnormality of each display unit; and an abnormality detecting means for detecting the abnormality from the abnormality detecting means. When a display symbol is hung on an abnormal display unit in which an abnormality is detected in accordance with the output, while performing a display symbol conversion process of converting the display symbol into a new display symbol using a display unit other than the abnormal display unit, Display symbol conversion means for stopping the display of the abnormal display unit, and a display symbol conversion process of the display symbol conversion means.
To reduce the space between characters or figures contained in the display symbol.
Move to a display unit other than the abnormal display unit
Process to convert to a new display symbol
It is a thing .

[0016]

Further, another information display device according to the present invention comprises:
Abnormality detecting means for detecting abnormalities of each display unit individually
And an abnormality according to the abnormality detection output from the abnormality detection means.
When a display symbol hangs on the abnormal display unit where is detected
Is displayed on the display unit other than the abnormal display unit.
Display symbol conversion process for converting to a new display symbol using
And stop displaying the error display unit
Display symbol conversion means, and a display pattern of the display symbol conversion means.
As the pattern conversion process, the size of the display symbol hanging on the abnormal display unit among the display symbols in a predetermined unit in the horizontal direction, the vertical direction,
Alternatively, processing for converting into a new display symbol reduced in the horizontal and vertical directions is performed.

Further, another information display device according to the present invention comprises:
Abnormality detecting means for detecting abnormalities of each display unit individually
And an abnormality according to the abnormality detection output from the abnormality detection means.
When a display symbol hangs on the abnormal display unit where is detected
Is displayed on the display unit other than the abnormal display unit.
Display symbol conversion process for converting to a new display symbol using
And stop displaying the error display unit
Display symbol conversion means, and a display pattern of the display symbol conversion means.
As a design conversion process, when a graphic is included in a display symbol, a process of deleting the graphic and converting the graphic into a new display symbol using the empty space generated thereby is performed.

Further, another information display device according to the present invention comprises:
Abnormality detecting means for detecting abnormalities of each display unit individually
And an abnormality according to the abnormality detection output from the abnormality detection means.
When a display symbol hangs on the abnormal display unit where is detected
Is displayed on the display unit other than the abnormal display unit.
Display symbol conversion process for converting to a new display symbol using
And stop displaying the error display unit
Display symbol conversion means, and a display pattern of the display symbol conversion means.
As a design conversion process, a process of converting a display symbol into a new display symbol having a display unit equivalent to the meaning of the display symbol in a predetermined unit and having a small display amount of the display symbol itself is performed.

[0020]

According to the present invention, when a display symbol is applied to an abnormality display unit according to an abnormality detection output from the abnormality detection means,
The display symbol conversion unit of the display symbol conversion unit converts the display symbol into a new display symbol using a display unit other than the abnormal display unit, and outputs it to a display unit other than the abnormal display unit. At that time, the display symbol conversion means
Display design conversion process, characters included in the display design
Or, reduce the space between figures and display
Is converted to a new display symbol that has been moved to the display unit.
Output to display units other than the normal display unit.

[0021]

Also, the abnormality detection output from the abnormality detection means is
Accordingly, when the display symbol hangs on the abnormal display unit
Is displayed by the display symbol conversion means of the display symbol conversion means.
New design using a display unit other than the abnormal display unit
It is converted to a shelf display pattern and displays other than the abnormal display unit
Output to the unit. At this time, the display symbol conversion processing by the display symbol conversion means is converted into a new display symbol in which the size of the display symbol applied to the abnormal display unit is reduced in a predetermined unit in the horizontal direction, the vertical direction, or the horizontal and vertical directions. Are output to display units other than the abnormal display unit.

The abnormality detection output from the abnormality detecting means is
Accordingly, when the display symbol hangs on the abnormal display unit
Is displayed by the display symbol conversion means of the display symbol conversion means.
New design using a display unit other than the abnormal display unit
It is converted to a shelf display pattern and displays other than the abnormal display unit
Output to the unit. At this time, if the display symbol includes a graphic, the display symbol conversion processing in the display symbol conversion means deletes the graphic and converts it into a new display symbol using the generated empty space, and displays an abnormal display unit. Output to other display units.

Also, the abnormality detection output from the abnormality detection means is
Accordingly, when the display symbol hangs on the abnormal display unit
Is displayed by the display symbol conversion means of the display symbol conversion means.
New design using a display unit other than the abnormal display unit
It is converted to a shelf display pattern and displays other than the abnormal display unit
Output to the unit. At that time, by the display symbol conversion process in the display symbol conversion means, the display symbol is converted into a new display symbol in a predetermined unit equivalent to the meaning of the display symbol and the display amount of the display symbol itself is small, and other than the abnormal display unit. Is output to the display unit.

[0025]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of an information display device according to one embodiment of the present invention. In the figure, the same or equivalent parts as those described above are denoted by the same reference numerals.

In FIG. 1, reference numeral 16 indicates an abnormality of each display unit 2 by comparing the monitor data received via the terminal 25 with the display data read from the display symbol storage circuit 12 and responds to the abnormality detection. An abnormality detection circuit 15 for outputting an abnormality detection signal by outputting serial display data to each display unit 2 and performing a display symbol change process in accordance with the abnormality detection signal from the abnormality detection circuit 16 It is.

FIG. 2 is a block diagram showing the display unit 2. In FIG. 2, serial display data supplied from the display symbol processing circuit 15 is output from a terminal 25 as monitoring data.

Next, the operation of the present invention will be described with reference to FIGS. Now, the display data read out from the display symbol storage circuit 12 is divided by the display symbol processing circuit 15 based on the display area corresponding to each display unit 2, converted into serial data, and then converted into the corresponding display unit 2.
Sent to

The shift register 21 of each display unit 2
Reads serial display data supplied via a terminal 23 based on a shift signal (not shown), sequentially shifts the serial display data to the next-stage shift register circuit 21, and converts the read serial display data into parallel display data. I do.

The latch / drive circuit 22 latches the parallel display data output from the shift register circuit 21 in response to a latch signal (not shown), and then outputs an output enable signal supplied via a terminal 24. , Each LE based on the latched parallel display data.
D3 is driven. Thereby, the LE of each display unit 2 is
The symbols divided by the display symbol processing circuit 15 are output to D3.

Further, the serial display data is shifted in response to the shift signal, and is sequentially output from the last-stage shift register circuit 21 via the terminal 25 as monitoring data for determining whether or not the display unit 2 is normal. Is done.

Therefore, when the serial display signal supplied to each display unit 2 is normally shifted by each shift register circuit 21, the monitor data becomes equal to the original display data and is not normally shifted due to a failure or the like. In such a case, the monitoring data and the original display data are different.

The abnormality detection circuit 16 compares the monitor data from each display unit 2 with the original display data read from the display symbol storage circuit 12 and, if the monitor data and the original display data are different, displays the display data. It is determined that some trouble has occurred in the unit 2 and the fact is output to the display symbol processing circuit 15 as an abnormality detection signal.

In response to the abnormality detection signal, the display symbol processing circuit 15 uses the display unit 2 other than the display unit in which the failure has occurred to normally display symbols to be displayed thereafter. The following display symbol change processing is performed on the display data read out from.

FIGS. 3 to 6 are explanatory diagrams showing a display symbol changing process as one embodiment according to the present invention. In the figure,
31, 41, 51, 61 are respectively provided with the abnormality detection circuit 16.
Is a display unit for which a failure has been detected.

In FIG. 3A, a symbol corresponding to the failure of the display unit 31 and the symbol "advance" of "entry prohibited" is not normally displayed. In this case, there are fifteen display units 2 on the right side of the display unit 31 in which the failure has occurred in the horizontal direction.
If it is displayed on the × 3 display unit 2, this is 5
The display symbol processing circuit 15 shifts the display start position of “entry prohibited” to the right side of the display unit 31 and reduces the display character interval. The display data is converted to display data and output to each display unit 2.

Accordingly, the display pattern of FIG.
As shown in (b), the display is performed while avoiding the display unit 31 in which the failure has occurred. The transmission of the display data to the failed display unit 31 is stopped, and all the LEDs 3 of the display unit 31 are turned off.

In FIG. 4A, a symbol corresponding to the failure of the display unit 41, that is, the word "advance" of "prohibition of fire entry" is not normally displayed in FIG. In this case, according to the same method as described above, the number of the display units 2 on the right side of the display unit 41 in which the failure has occurred is only 10 characters in the horizontal direction, that is, only 3.3 characters.
Since the character “entry prohibited” cannot be displayed, the size of the normally displayed character is reduced and displayed within the limit of visibility.

That is, in order to display four characters in ten horizontal spaces, one display unit 2 must be 16 ×
If it is assumed that 16 dots are required and that the space between the characters adjacent to the horizontal character normally requires 9 dots from the viewpoint of visibility, one character is (16 × 1
0) It suffices to display the image with $ 4-9 = 31 dots.

FIGS. 7A and 7B are explanatory diagrams showing an example of character reduction. FIG. 7A shows a normal character having 39 dots in the horizontal direction, and FIG. 7B shows a reduced character in which the horizontal direction is reduced to 31.
Thus, the display symbol processing circuit 15 moves the display start position of “entry prohibited” to the right side of the display unit 41, converts the display start position into new display data using reduced characters, and outputs the display data to each display unit 2.

Therefore, the display pattern of FIG.
As shown in (b), the display is performed while avoiding the display unit 41 in which the failure has occurred. Note that several types of reduced characters may be prepared in advance and stored in a memory or the like, or may be reduced to an appropriate size by calculation each time. The size may be reduced not in the horizontal direction but in the vertical direction or in both the vertical and horizontal directions.

Further, the "tunnel ahead" in FIG.
Is displayed as reduced characters with a width of 31 dots, but for characters that are more visible than kanji, such as hiragana, katakana or numbers, characters such as half-width characters for full-width characters on PCs and word processors, etc. It is also possible to use one that has been reduced at a higher rate than kanji.

In FIG. 5 (a), a symbol corresponding to the failure of the display unit 51, that is, "entrance prohibited" is not normally displayed. In this case, according to the same method as described above, the display unit 2 on the right side of the display unit 51 in which the failure has occurred.
There are only 3.6 characters in the horizontal direction, that is, reduced characters (31 dots) close to the visibility limit, and it is not possible to display four characters "entry prohibited".

Here, this display symbol is composed of characters and figures, and even if this figure is deleted, the main contents of the information, that is, "entry prohibited" can be notified by the characters. What is necessary is just to delete this figure and display a character in the empty space.

That is, the display symbol processing circuit 15 deletes the figure and displays “in the tunnel” from the left end, and evenly sets “prohibition of entry” in the spaces on both sides of the display unit 41 so as not to be hung on the display unit 41 having the obstacle. Is converted into new display data arranged in the display unit 2 and output to each display unit 2.

Therefore, the display pattern of FIG.
As shown in (b), the display is performed while avoiding the display unit 51 in which the failure has occurred.

In FIG. 6 (a), a symbol corresponding to the failure of the display unit 61, that is, "middle" of "caution during operation" is not normally displayed in FIG. 6 (a). In this case, since the characters are displayed in reduced characters (31 dots) from the beginning, and no graphics are included in the display symbols, they cannot be displayed in the same manner as described above.

Here, display contents having a high degree of importance are replaced with display patterns having the same meaning of display information and a small number of characters, that is, display patterns having a small display amount, so as to avoid the display unit 61 having a failure. It can be displayed.

In other words, the display symbol processing circuit 15 displays the display symbols “working in the tunnel” and “running attention” with a small number of characters prepared in advance according to the meaning of the display symbol “running attention in the tunnel ahead”. Select and display "Working in tunnel" from the upper left corner, and convert "Caution" into new display data evenly arranged in both sides of the space so as not to be hung on display unit 61 with obstacles. Output to unit 2.

Therefore, the display pattern of FIG.
As shown in (b), the display is performed while avoiding the display unit 61 in which the failure has occurred. For display contents with high importance, proper nouns such as place names are deleted to reduce the number of characters, and several kinds of display symbols are prepared in advance as common display patterns for all information display devices 1 and stored in a memory or the like. By
It is possible to easily select and display according to the abnormality detection of the display unit 2.

In the above description, the control circuit 10
An abnormality of each display unit 2 is detected by the abnormality detection circuit 16 and the display symbol processing circuit 1 is operated in accordance with the abnormality detection signal.
5, the case where the display data read from the display symbol storage circuit 12 is configured to be converted is described.
These circuits can be realized by a micro CPU and software other than the logic circuit.

FIG. 10 shows a micro C
9 is a flowchart showing a display symbol process in the micro CPU when configured by a PU. In this case, display permission / inhibition is preferentially determined from a symbol having good visibility.

FIG. 11 is an explanatory view showing a pattern of a symbol display position. In FIG. 11, reference numerals 111 to 113 denote symbol display positions when a failure occurs in any of the display units 2 in the first column from the left. Where 111 is a four-character display, 112 is a five-character display, 113
Indicates the case of displaying six characters. Also, 12
Similarly, 1 to 123 and 131 to 133 are patterns indicating the symbol display positions corresponding to the number of characters when the abnormal display unit 2 is in the second column and the third column, respectively, from the left.

If a failure occurs in any of the display units 2 and a display symbol to be displayed on the display unit 2 is applied, first, all the Ls of the failed display unit 2 are displayed.
The ED 3 is turned off (step 101).

Next, it is determined whether or not the symbol is moved to the abnormal display unit 2 by moving the display position of the symbol (step 102). In this case, the determination may be made based on whether or not the number of characters of the symbol to be displayed is equal to or less than a predetermined number of characters.

If the display can be performed by moving the display position (step 102: YES), the symbol is moved to a display position where the symbol to be displayed does not cover the abnormal display unit 2 (step 103).

Here, when the display position of the destination is determined, as shown in FIG. 11, a pattern indicating the display position is prepared in advance according to each column position of the abnormal display unit 2 and each number of display symbols. Thereby, the display position determination processing can be simplified.

For example, as shown in FIG. 3A, when the abnormal display unit 31 is the unit in the third column from the left and the displayed symbol is the four characters "entry prohibited", 131 in FIG. Is based on the pattern, "Shin" is the fourth column from the left,
"On" is the 8th column from the left, "Prohibited" is the 12th column from the left,
"Stop" should be displayed in the 16th column from the left, respectively, and is displayed in the same manner as in FIG. 3B.

If the display cannot be performed by moving the display position (step 102: NO), it is determined whether or not the display symbol does not cover the abnormal display unit 2 by reducing the display characters (step 104). Also in this case, the determination may be made based on whether or not the number of characters of the symbol to be displayed is equal to or less than a predetermined number of characters different from the above.

If the display can be performed by using the reduced characters (step 104: YES), the display characters are switched to the reduced characters and the pattern is displayed (step 105), as shown in FIG.

In this case as well, the display position of each reduced character can be determined based on each pattern shown in FIG. Since reduced characters are used, the display position does not correspond to the row of the display unit.

If the display is not possible even if the reduced characters are used (step 104: NO), it is determined whether or not a graphic is included in the display symbol (step 106). (Step 106: YES), the figure is switched to character display and displayed as in FIG. 5 (Step 107).

Further, when no graphic is included in the display symbol (step 106: NO), the display is switched to a new display symbol with a small display amount, as shown in FIG. (Step 108).

In the above description, a case has been described in which the shift register circuit 21 and the latch / drive circuit 22 are provided as the display unit 2 to display display data supplied as serial signals. It is also possible to assign an address to each display unit 2 and supply display data by a parallel signal.

[0065]

As described above, according to the present invention, an abnormality detection circuit for detecting an abnormality of each display unit and a display symbol processing circuit for converting an original display symbol are provided. Move the pattern, reduce the character spacing or character size, delete the figure, or perform a conversion process such as replacing it with a display pattern with a small display amount. Is displayed.

Therefore, in the information display device for displaying various information, even if a failure occurs in any one of the display units, the original content of the information can be accurately displayed and the high reliability can be obtained. To play.

[Brief description of the drawings]

FIG. 1 is a block diagram of an information display device according to an embodiment of the present invention.

FIG. 2 is a block diagram of a display unit in FIG.

FIG. 3 is an explanatory diagram showing a display symbol conversion process according to one embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a display symbol conversion process according to another embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a display symbol conversion process according to another embodiment of the present invention.

FIG. 6 is an explanatory diagram showing a display symbol conversion process according to another embodiment of the present invention.

FIG. 7 is an explanatory diagram showing dot configurations of normal characters and reduced characters.

FIG. 8 is an external view showing a general information display device.

FIG. 9 is an explanatory diagram showing a general display unit.

FIG. 10 is a flowchart showing a display symbol conversion process using a micro CPU.

FIG. 11 is an explanatory diagram showing a pattern of a symbol display position.

FIG. 12 is a block diagram of a conventional information display device.

FIG. 13 is a block diagram of a conventional display unit.

[Explanation of symbols]

 Reference Signs List 1 information display device 10 control circuit 11 display symbol storage circuit 15 display symbol processing circuit 16 abnormality detection circuit 2 display unit 21 shift register circuit 22 latch drive circuit 23 to 25 terminal 3 light emitting diode (LED) 111 to 133 pattern

Continuing from the front page (73) Patent holder 390010054 Koito Industry Co., Ltd. 100, Maeda-cho, Totsuka-ku, Yokohama-shi, Kanagawa-ken 72) Inventor Kazuhisa Murata 492 Minosho-cho, Yamatokoriyama-shi, Nara Pref. Hiroshi Miwa-machi, Kaifu-gun, Aichi Prefecture Oita, Shinoda-ku 29-2, Nagoya Denki Kogyo Co., Ltd.Miwa Plant Document JP-A-5-108021 (JP, A) JP-A-6-289805 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G09G 3/20 G08B 23/00 510 G09F 9 / 33

Claims (4)

(57) [Claims] 1. A display device comprising a plurality of display elements arranged in a vertical and horizontal matrix and a drive circuit for driving the display elements. A plurality of display units are controlled. An information display device that displays a display symbol comprising: an abnormality detection unit that individually detects an abnormality of each of the display units; and an abnormality display unit that detects an abnormality according to an abnormality detection output from the abnormality detection unit. When the display symbol conversion process to convert the display symbol to a new display symbol using a display unit other than the abnormal display unit, and to stop the display of the abnormal display unit, comprising a display symbol conversion process of the display symbol converting means, said display
Reduce the space between characters or figures included in the pattern
New unit moved to a display unit other than the abnormal display unit
An information display device, which is a process of converting a display pattern into a simple display symbol . 2. A large number of tables arranged in a vertical and horizontal matrix.
Display unit comprising a display element and a drive circuit for driving the display element
To control these display units.
Displays a display pattern consisting of characters and figures in dot display.
In the information display device shown, an abnormality detecting means for individually detecting an abnormality of each of the display units.
And an abnormality is detected in accordance with the abnormality detection output from the abnormality detection means.
When the displayed symbol is applied to the issued error display unit
Displays the display symbols on display units other than the abnormal display unit.
Display design conversion to convert to new display design using knit
Process and stop displaying the error display unit.
Display symbol conversion means for stopping, the display symbol conversion processing of the display symbol conversion means,
The size of the display symbol on the abnormal display unit
Size in specified units horizontally, vertically, or horizontally and vertically
An information display device, which is a process of converting a new display symbol reduced in direction . 3. A large number of tables arranged in a vertical and horizontal matrix
Display unit comprising a display element and a drive circuit for driving the display element
To control these display units.
Displays a display pattern consisting of characters and figures in dot display.
In the information display device shown, an abnormality detecting means for individually detecting an abnormality of each of the display units.
And an abnormality is detected in accordance with the abnormality detection output from the abnormality detection means.
When the displayed symbol is applied to the issued error display unit
Displays the display symbols on display units other than the abnormal display unit.
Display design conversion to convert to new display design using knit
Process and stop displaying the error display unit.
Display symbol conversion means for stopping, the display symbol conversion processing of the display symbol conversion means,
If the design includes a figure, delete the figure
New display pattern using the empty space generated by
An information display device, characterized in that the information display device converts the information into an information. 4. A large number of tables arranged in a vertical and horizontal matrix
Display unit comprising a display element and a drive circuit for driving the display element
To control these display units.
Displays a display pattern consisting of characters and figures in dot display.
In the information display device shown, an abnormality detecting means for individually detecting an abnormality of each of the display units.
And an abnormality is detected in accordance with the abnormality detection output from the abnormality detection means.
When the displayed symbol is applied to the issued error display unit
Displays the display symbols on display units other than the abnormal display unit.
Display design conversion to convert to new display design using knit
Process and stop displaying the error display unit.
Display symbol conversion means for stopping, the display symbol conversion processing of the display symbol conversion means,
A symbol is displayed in a predetermined unit, which is equivalent to the meaning of the display symbol.
Convert to a new display design with a small amount of display of the design itself
An information display device characterized by processing.