JPH0113599B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates generally to road condition display devices, and more particularly to road traffic condition display devices.

More specifically, information about road traffic displayed on road traffic status display boards installed in traffic control centers in major cities in Japan is transmitted in a modular format, which is then received using a receiver.
The present invention relates to an in-vehicle or fixed road condition display device that can reproduce and display part or all of the road condition display device.

Currently, traffic congestion in major cities has become a major social problem. Problems caused by traffic congestion include (1) increased mental and physical burden on drivers, (2) concerns about traffic safety, (3) loss of energy resources, (4) air pollution, Examples include: In order to deal with these problems, wide-area traffic control is becoming necessary.

The first clue to solving this problem is that the driver
The objective is to make it possible to obtain accurate information regarding the traffic conditions, degree of congestion, etc. regarding the roads around the current location of the vehicle being driven and the roads leading to the destination.

This issue has been approached from many angles, but the methods described below are: (1) Saving capital investment, (2) Utilizing current equipment, and (3) Making it possible to obtain information over a wide area. It can be said that it is the most excellent method in terms of performance, etc.

Road traffic status display boards have already been installed at the Metropolitan Police Department and National Police Agency in each major city, allowing them to view the traffic and road congestion conditions within their jurisdiction.

The information displayed on this road traffic status display board is
The information is collected using vehicle detectors installed at intersections, monitor television cameras, helicopters, patrol cars, etc., and is the most up-to-date and accurate information currently available.

In addition to being used to control traffic lights, this type of information is also communicated to drivers by means such as display on signboards or display boards, traffic control and guidance using motorcycles, and radio broadcasts.

However, a means by which a driver can arbitrarily obtain information about a place or region that he or she needs, whenever necessary, has not yet been developed, and the development of such a means is desired.

The present invention was made in response to the above-mentioned demand, and the information displayed on the road traffic status display board is repeatedly broadcast using radio broadcasting or the like, and the information is stored in a storage device connected to a receiver. The present invention provides a road condition display device that records information and allows a driver or the like to visually display information about a required area in a timely manner.

Since this type of road condition display system has not yet been put into practical use, it is unlikely that a sufficient understanding will be gained by only explaining the parts directly related to the device of the present invention, so first we will explain the entire system. An overview of the general configuration and operation is explained below.

FIG. 1 is a block diagram of the entire system.

The purpose of this system is to display information displayed on a road traffic status display board installed at the Metropolitan Police Department, for example, on a display device installed at the user's side.

Therefore, the source of information used in the present invention is the original road traffic status display board device 1 shown in FIG.
This is the information. This system is based on the dashed line 12 in Fig.
It is expected that most of the demand will be for use as an in-vehicle display device configured by the block diagram surrounded by .

Therefore, the electric circuit generally indicated by the reference numeral 12 in FIG. 1 must be as simple as possible, and must also be simple to operate.

As a means to satisfy these requirements, in this system, the information from the original road traffic condition display board device 1 shown in FIG. 1 is re-inputted into the display memory 3 via a modularization circuit. Since this modularization method is the basis of this system, it will be explained in detail below.

The road map used on the road traffic status display board of the Metropolitan Police Department is a representation close to the actual map, as shown in FIG. On the other hand, the modularized road traffic status display board of this system is a representation in which roads are transformed (modularized) into a checkerboard shape, as shown in FIG.

In these figures, the alphanumeric characters surrounded by circles are intersection identification codes, and the same alphanumeric characters represent the same intersections. Fourth
The intersections on the map of the modular road traffic status display board shown in the figure are located on the intersections of vertical and horizontal lines drawn in a grid pattern at equal intervals (for example, 14 in Figure 2), as shown in Figure 2. As such, roads are also promised to coincide on vertical or horizontal lines.

In other words, in the map on the display board in FIG. 4, the distance between adjacent intersections is modularized so that it is an integral multiple of a certain reference value.

In addition, on the road traffic status display board installed at the Metropolitan Police Department, lamps that emit light in three different hues are installed on each road on the road map as shown in Figure 3, and two adjacent intersections are displayed. The structure is such that the degree of vehicle congestion on the connecting roads is displayed by changing the color of the emitted light.

For this reason, in the memory of the original road traffic status display board device 1 shown in FIG. remembered as a group.

In other words, taking intersection G in Figure 3 as an example, there are four types of cars: 1. Vehicles heading from intersection G to F. 2. Vehicles heading from intersection G to H. 3. Vehicles heading from intersection G to I. 4. Vehicles heading from intersection G to S. Either the information is grouped into one group, or the four types of information are grouped into one group: 1. Cars heading from intersection F to G. 2. Cars heading from intersection H to G. 3. Cars heading from intersection I to G. 4. Cars heading from intersection S to G. Either you do it.

In the display board 4 or 13 in which the present invention is implemented, in order to correspond to the display method of the original road traffic status display board device described above, (1) the LED light emitters emitting light in the shape of an arrow are replaced with the LED light emitting bodies shown in FIG. (2) The light emitting devices 21 are arranged in opposite directions and in pairs along the vertical and horizontal lines as shown in FIG. (3) The road map panel 20 is modularized and positioned as described above with respect to Figure 4, and is printed so that the road portion is transparent; Therefore, a memory 10 for storing data for control, and (4) means for reading the data in the memory to control the light emission of each of the arrow-shaped light emitters are provided. As is clear, the road map panel in FIG. 6 corresponds to that in FIG.

Therefore, by overlaying the road map panel 20 of FIG. 6 on the light emitting device 21 of FIG. The light emitter becomes visible as shown in FIG. FIG. 7 is an enlarged view of the portion circled in FIGS. 5 and 6. FIG.

This light emitter can emit light in three colors according to the principle described later, and the direction of the arrow matches the direction of the flow of cars. FIG. 13 is a sectional view taken along line MM in FIG. 7.

As a specific example of the light emitting device 21 suitable for the present invention, as shown in FIG. Light emitter unit 1 as shown in Figure 8
5 and make it into a mosaic (for example, 40 vertically)
50 pieces horizontally) are arranged tightly on the same surface.

In addition, in FIG. 8, 16 to 19 are arrow-shaped light emitters arranged along each side of the rectangular surface.
As is clear from the figure, the direction of each arrow is such that it circulates in one direction inside the periphery of the rectangle, but this is not necessary; for example,
The arrows 16 and 18 may be directed in opposite directions. That is, the directions of the arrows need only be opposite to each other on the two opposing sides.

In this system, the arrow-shaped light emitters 16 to 19 as described above emit light in correspondence with the display lamps of the road traffic condition display device of the Metropolitan Police Department.

The display memory 3 (Fig. 1) which gives display commands to the road traffic status display board 4 which has been made into a module in this way has a light emitter unit including four arrow-shaped light emitters as shown in Fig. 8. It is convenient to treat this as one unit electrically and to store information as data on how to make the four light emitters of one unit emit light.

The modularization circuit 2 in FIG. 1 re-edits the road information for the original road traffic status display board device 1, which stores data for each intersection as one group, into data for each light emitting unit as described above. , and serves to store it in the display memory 3.

In this case, the correspondence between the position where the above-mentioned light emitter unit is arranged and the address of the memory may be any correspondence as long as it is known, but here, for convenience of explanation, it is determined in advance as follows. It is assumed that

For example, in a light emitting device 21 constituted by the light emitting units 15 arranged vertically and 50 horizontally, one vertical row of light emitting units arranged at the left end is defined as the first column, and the light emitting units 15 are sequentially arranged. 2nd column to the right...name it 50th column. In addition, the group of light emitting units arranged in one horizontal row at the top is the first row, and the second row goes downward, and so on...40th row.
Name it row.

Data regarding the light emission of the light emitter unit located in the first column and first row is input to the address "1" of the memory 3. For the light emitter unit in the first column and second row, the address is input to "address 2". Hereafter, the data related to the light emitting units in the 1st column and up to the 40th row will be sent to the address "40".
Please input each by.

Next, for the second column as well, input the addresses ``41 to 80'' from the 1st row to the 40th row.

In this way, from the unit located in the 1st column, 1st row to the unit located in the 50th column, 40th row,
For each of the 2000 light emitting units, input corresponding to an address "1 to 2000".

Next, when transferring or transmitting data, the display memory 3 is searched in the order of addresses 1, 2, . . . 2000, and the data is read.

The read data is stored in the receiving side's main memory (9 in FIG. 1) via the transmitter 5 and receiver 6.
The address is input so that it is the same as the display memory 3 on the sending side.

If you do this, the main memory 9 in Figure 1
It is clear that when a fixed road traffic status display board 13 having the same structure as the modular road traffic status display board 4 is connected to the above, it is possible to display exactly the same information on the display board 13. It is.

In the case of large display boards to be installed and used inside buildings, the purpose is achieved by the method described above, but display boards intended for use in vehicles (11 in Figure 1) In this case, the practical size is limited to the size of 10 vertically and 10 horizontally arranged light emitting units 15 shown in FIG.

Therefore, the fixed road traffic status display board 1 in Figure 1
It is difficult to display all of the information displayed in step 3 at once, so it is difficult to display all of the information displayed in 3.
A structure that allows partial information to be displayed becomes necessary.

A specific example is a rectangular screen of a light emitting device made by arranging 11 light emitting units 15 vertically and 11 horizontally, as shown in FIG. It is possible to cut out and display any part of the fixed road traffic status display boards 13 that are lined up.

A device whose purpose is to display local road traffic information in this way is shown in Figure 1 with reference numeral 11.
This is an in-vehicle road traffic status display board shown in . In order to enable information display on the vehicle-mounted road traffic status display board 11, the display area selection switch 7, control circuit 8, and sub-memory 10 shown in FIG. 1 are provided. Note that the operating principles of these circuits will be described later.

Below, the structure and operation of each part constituting this system will be explained in detail.

1 Regarding the vehicle-mounted road traffic status display board device The vehicle-mounted road traffic status display board device of the present system is comprised of the portion surrounded by the broken line 12 in FIG. 1, as described above. FIG. 9 is an exploded perspective view showing a schematic configuration of the vehicle-mounted road traffic status display board device according to an embodiment of the present invention.

Road map panel 20 and light emitting device 21 in the figure
constitutes the in-vehicle road traffic status display board 11. The circuits of the receiver 6, control circuit 8, main memory 9, and sub memory 10 shown in FIG. 1 can be mounted on the board 22.

Further, 23 and 24 in the figure are phototransistors, and 25 and 26 are lamps.As will be explained in detail later, in combination with the hole 27 provided in the road map panel 20, It functions as a display area selection switch 7. Note that 33 is a front panel, and 34 is a back cover.

FIG. 10 is a detailed representation of an example of the road map panel 20 shown in FIG. 9. A large number of road map panels 20 are prepared with maps of different divisions printed on them, and are designed to be dropped from above and stacked on the front surface of the light emitting device 21 shown in FIG. 9.

Furthermore, this road map panel 20 has a symbol 2.
Small punch holes as shown by 7R and 27L are provided on both sides, and by stacking the panel by dropping it onto the light emitting device from above, the phototransistors 23 and 24 in FIG. By activating a photoelectric switch constituted by lamps 25 and 26 provided on the panel, the section of the map printed on the panel can be identified.

The signal generated by this photoelectric switch activates the control circuit 8, and from among the data stored in the main memory 9, a display corresponding to the currently installed road map panel 20 is displayed on the vehicle road traffic situation. Only the data necessary for displaying on the display board 11 can be written into the secondary memory 10.

The reason why such a structure is necessary is as follows.

Taking the Tokyo Metropolitan Police Department's road traffic status display device as an example, this display board device provides information on congestion conditions near each major intersection in Tokyo and major intersections in the suburbs, as well as entrance regulations on the Metropolitan Expressway. The amount of information is over 500, including the number of intersections and entrances to the Metropolitan Expressway.

On the other hand, since the in-vehicle road traffic status display board device of this system is intended for in-vehicle use, there are dimensional restrictions, and the number of intersections that can be displayed is limited at most.
It is about 100. Furthermore, for the driver of a specific vehicle, it is sufficient to know the surrounding situation of his or her current location, and there is no need to display the entire area.

Therefore, it becomes necessary to display the case where an arbitrary part of the entire map is cut out.

2 Regarding the method of road traffic status display board The road map panel 20 of the present invention shown in FIG. 10 has a road map printed on it so that road portions are transparent or translucent, as described above with reference to FIG. There is. Portions other than the road are made opaque by printing characters and other characters.

Therefore, when the road map panel 20 is stacked on the light emitting device 21 in the state shown in FIG. 9, as is clear from the above description regarding FIGS. At least two arrow-shaped light emitters will be visible in parallel and opposite directions on the road section between them.

A concrete example of such a display method is given in the 11th section.
12, 13, and 14. 1st
FIG. 1 is an example of the road map panel 20 of the present invention, the first
FIG. 2 also shows an example of the light emitting device 21 of the present invention. FIG. 13 is a sectional view when the road map panel 20 is stacked on the light emitting device 21, and FIG.
It is a front view showing a state where it is visible as a map.

Reference numerals 28 and 30 in FIG. 14 represent intersections, and the directions of the arrows of the arrow-shaped light emitters 29 and 31 represent the flow of automobiles.

Each arrow-shaped light emitter is configured to be able to emit light in three colors as described above, so each color corresponds to the degree of road congestion, and each arrow-shaped light emitter is configured to emit light in one color. By emitting light, it is possible to display the degree of congestion in the flow of cars from one intersection to another adjacent intersection.

As is clear from the above description, the feature of the road condition display device to which the present invention is applied is that it can display multiple types of maps printed with different divisions by just preparing one light emitting device. By preparing a road map panel, it is possible to selectively display a wide range of road traffic conditions.

3 Regarding the structure of the road map panel In the center of the road map panel 20 used in the present invention, a road map is printed in which road portions are transparent or semi-transparent and other portions are opaque (Fig. 10). ).

The map printed here is a modular map as described above with respect to FIG.

Further, punch holes 27R and 27L are provided in a vertical line along the left and right side edges of the panel 20, respectively. . In the example of FIG. 10, on the right side there are m punch holes 27R of the same diameter so as to maintain equal intervals I.
Also, on the left side, n holes 27L having the same diameter are provided.

However, the above n is an arbitrary integer satisfying o≦n≦m, and the distance between the holes 27L provided on the left side must be an integral multiple of l.
As long as the above conditions are satisfied, the holes on the right side and the holes on the left side may be interchanged.

These holes transmit signals that identify which region the map printed on the panel is from.
This is for sending to the control circuit 8 in FIG. The reason why this hole is necessary is as follows.

That is, this panel can be used to display road traffic conditions only on a portion of the road traffic condition display boards installed at the Metropolitan Police Department. Therefore, when displaying the road map panel 20 over the light emitting device 21, the light emitting device must emit light corresponding to the road map printed on the panel.

As mentioned above, there are many road map panels with different maps printed on them, so if, for example, the switch operation to instruct the light to match the map is left to the user's hands, the road map panel After stacking the panel 20 on the light emitting device 21,
After looking at the separately prepared comparison table, etc., you can learn how to operate the switch to make the light emit according to the panel.
need to be executed.

Such operations are not only troublesome for the user, but must also be unnecessary for in-vehicle equipment from the standpoint of preventing danger. The holes 27L and 27 provided in the road map panel 20
R is essential for automatically performing the above operations.

4 Regarding identification method of road map panel Fig. 15 shows road map panel 2 suitable for the present invention.
FIG. 2 is a detailed explanatory diagram of 0 punch holes 27L and 27R. 2
7R has approximately 10 holes with a diameter of about 2 mm arranged in a vertical line on the right edge of the panel. The holes are named H-1...H-m in order from the top, and the dimensions from the bottom edge of the panel to the center of each hole H-1...H-m are respectively l-1...l-m.

27L are punch holes arranged in a vertical line on the left side edge of the panel 20, and in order from the top, D-1...D
-n, each hole D-1 from the bottom edge of the panel.
...The dimension to the center of D-n is l-1...
Make it l−n. In this example, the 15th
As you can see from the figure, each extraction hole 2 from the bottom edge of the panel.
The dimensions up to 7L are positioned to be equal to any of the punch holes 27R on the right side edge.

FIG. 16 is a sectional view of the road map panel 20 viewed from the direction of arrow XX in FIG.
5, 26 and phototransistors 23, 24, and insert these and each hole 27L, 27 in the panel 20.
This shows the positional relationship with R. Also, the first
FIG. 7 is a sectional view taken along the line Y--Y in FIG. 15.

When the road map panel 20 is inserted from top to bottom as shown by the arrow in FIG.
The hole 27R is connected between the phototransistor 24 and the
-m...It will pass in the order of H-1. On the other hand, the extraction holes 27L are in the order of D-n...D-1,
It passes between the lamp 25 and the phototransistor 23.

In this case, as explained above, each hole 27L
is bored at the same height as any of the holes 27R, so the holes D-n...D-1 pass between the lamp 25 and the phototransistor 23 at the holes H-m...H- 1 passes between lamp 26 and phototransistor 24 at the same time.

Therefore, when the road map panel 20 is passed between the lamp and the phototransistor in the direction indicated by the arrow in FIG. 17, the output is as shown in FIG. 18. However, in this example, it is assumed that m is 10 and n is 5. In FIG. 18, 41 is the output waveform of the phototransistor 24, and 42 is the output waveform of the phototransistor 23.

These outputs 41 and 42 are supplied to input terminals 43 and 44 of an AND gate 45, respectively, as shown in FIG. The output of the AND gate 45 is input to the input terminal 46 of a shift register 93 composed of flip-flops FF1 to FF10. The output 41 is also simultaneously input to the clock terminal Cp of each flip-flop.

As a result, all the holes 27R and 27L are connected to the lamps 25, 26 and the phototransistors 23, 2.
4, the following outputs are obtained at the output terminals Q-1 to Q-10 of the shift register 93.

Q-1=1, Q-2=0, Q-3=1, Q-4=0, Q-5=0, Q-6=1, Q-7=1, Q-8=0, Q- 9=0, Q-10=1, As is clear, the above operation utilizes the hole 27R in the panel 20 of FIG. 15 as a synchronization pulse signal source, and the other hole 27L as a serial data pulse signal source. The presence or absence of the hole D-1...D-n at each corresponding position of H-1 to H-m is determined by the output "1" of the electrical output Q-1...Q-10,
This is to obtain a result that corresponds to "0".

Output Q-1 of each stage of the shift register 93...
...Q-10 can obviously be used as a control signal and makes it possible to electrically identify the road map panel. When n is 10, 2 to the 10th power is 1024, so it is possible to replace the identification codes of 1024 types of panels with electrical outputs.

5 About the light-emitting unit The light-emitting unit 15, as shown in FIG.
Inside the synthetic resin case (width: 12 mm, thickness: approximately 7 mm),
Four sets of two LED elements are arranged along each side of a rectangular surface when viewed from the front to create an arrow-shaped display.

For each arrow, the corresponding LED elements can be made to emit light individually or simultaneously (or alternately and sequentially), thereby making it possible to emit light in three different colors. It is being done.

As can be seen from FIGS. 20 and 23, this light emitting unit 15 is made by combining an outer case 15A shown in FIG. 21 and a chip-on-board 15B shown in FIG. .

As can be seen from FIGS. 21 and 23, the outer case 15A is provided with four arrow-shaped holes 61 along the four sides of a rectangle seen from the front.

On the other hand, the chip onboard 15B has eight
Four sets of two LED elements 53 to 60 are attached.

As can be seen from the cross-sectional view shown in FIG. 23 and the top view of FIG. They are arranged so that one set is housed in each arrow-shaped hole 61 of the case 15A.

After combining the outer case 15A and the chip-on-board 15B, by filling the arrow-shaped hole 61 with a translucent (e.g., epoxy) resin, the LED element is no longer directly visible from the front. Instead, the light emitted from the LED element is diffused, making the entire arrow-shaped surface appear to be emitting light.

Note that, as described above, instead of processing the punching hole 61 itself so that its cross section is arrow-shaped, the punching hole is bored to have a rectangular cross section, and an opaque hole having an arrow-shaped transparent or semi-transparent part is formed on the outside front surface. A sheet may also be attached.

Of the eight LED elements, 53, 54, 5
5 and 56 emit light of the same color A. In addition, other LED elements 57, 58, 59, 60
emits color B, which is different from color A.

Therefore, LED elements 53, 54, 55, 5
6 emits light, the arrow-shaped surfaces 16, 17,
18 and 19 (Figure 8) are LEDs that emit color A.
When the elements 57, 58, 59, and 60 emit light, they emit color B.

Next, either make the two LED elements in the same hole 61 emit light at the same time, or make each LED
When the elements are made to emit light alternately at a repetition rate of approximately 50 times or more per second, the third color C, which is a mixture of colors A and B, appears to the human eye.

Note that the color C can be adjusted to some extent by changing the ratio of the luminescence time and/or the ratio of the luminescence intensity of the color A and the color B.

FIG. 25 is an example of an electric circuit for driving a light emitter unit. In the figure, the part surrounded by the chain line 61A is the LED element part, and 47 to 52 are the 20th
This is the terminal shown in the figure. Also, 62, 63, 6
4 and 65 are input terminals for specifying the emission color; 66,
Reference numerals 67, 68, and 69 are input terminals for specifying the position of the arrow-shaped light emitter.

The input data to each terminal is specified as "high" or "low", and input terminal 6 for specifying luminescent color
If only the signal to terminal 62 among the signals to terminals 2 to 65 is high, the emitted color is color A, and the signal to terminal 63 is high.
If only the signal to is high, the emitted color is color B.

Further, when only the signal to the terminal 64 is high, the emitted color is color C, that is, color A and color B are emitted alternately. Further, when only the signal to the terminal 65 is high, all the LED elements are turned off.

On the other hand, input terminals 66 to 69 for specifying the position of the light emitting body
When only the signal to the terminal 66 among the signals to the terminal 66 is high, the arrow-shaped light emitter 16 emitted by the LED elements 56 and 60 emits light in the color designated by the color designation signal.

Similarly, when only the signal to terminal 67 is high, the arrow-shaped light emitter 17 is activated, and when only the signal to terminal 68 is high, the arrow-shaped light emitter 18 is activated, and only the signal to terminal 69 is high. In this case, the arrow-shaped light emitters 19 each emit light in a designated color.

In addition, in the case of this circuit example, the terminals 66, 6
If 7, 68, and 69 become high at the same time, it will not be possible to designate an independent color for each of the arrow-shaped light emitters 16, 17, 18, and 19. Therefore, in this embodiment, the terminals 66, 67, 68,
A circuit is required to control so that only one of 69 goes high sequentially.

The circuit for achieving this purpose is a multiplexer comprised of an oscillator 75, a 1/4 frequency divider/logic circuit 70 fed with its output, and analog switches 71-74. The oscillator 75 outputs a rectangular wave pulse whose repetition frequency is preferably about 50 Hz to 1 KHz.

FIG. 26 is a waveform diagram of each part in FIG. 25. 7
9 is the output waveform of the oscillator 75;
0 and 81 are collector voltage waveforms of transistors 77 and 78, respectively. 82, 83, 84, 85
shows the signal waveforms supplied from the 1/4 frequency division/logic circuit 70 to each of the analog switches 71, 72, 73, and 74.

When the signal waveforms 82 to 85 are high, the corresponding analog switch is in a low impedance, ie, conductive state, and when it is low,
High impedance, that is, in a cut-off state.

As is clear from the above explanation, 8-bit data can be input to the 8 terminals of the circuit shown in FIG. Accordingly, the four arrow-shaped light emitters 1 of the light emitter unit 15
It is possible to independently control the presence or absence of light emission in 6 to 19 and control the three types of light emission colors.

6 Regarding the data transfer method from the main memory for wide area road traffic information to any sub-memory for limited area Read only the road traffic information for an arbitrarily limited area from the large capacity main memory that stores road traffic information for a wide area. The data import device for importing data into the sub memory corresponds to the control circuit 8, the main memory 9, and the sub memory 10 in FIG.

Note that the word "data" used in the following description means an 8-bit signal input to the input terminals 62 to 69 of the driver circuit of the light emitter unit described in the previous section.

As mentioned above, the fixed road traffic condition display board 13 shown in FIG. 1 is for wide area use, and the light emitting unit 15 shown in FIG.
50 pieces arranged side by side, tightly arranged. The 27th conceptual illustration of this situation is
It is a diagram.

As shown in the figure, for each light emitting unit used, the one in the first column and the first row is U(1,1), and the one in the first column and the second row is U(1,1).
Name it (1, 2).

Hereafter, in the same way, the 40th row of the 1st column is changed to U
(1,40), second column, first row and second
column and 40th row are U(2,1)U(2,
40). In this way, for the 40th column and 50th row, U (40, 50), etc.
Name all 2000 light emitter units.

Also, in the main memory 9, from address 1 to address 2000, data of U (1, 1),
Data of U(1,2), ...Data of U(1,40), Data of U(2,1), ...U(40,
It is assumed that the data of 1), .

Now, as shown in Fig. 28, b light emitting units are arranged vertically and a number horizontally (a and b are integers satisfying 50>a>1 and 40>b>1, respectively). A light emitting device 21 for a limited area that is being manufactured -- that is, a road traffic status display board 1 for use in a vehicle.
1, the road traffic situation in an arbitrary partial area of the fixed road traffic situation display board 13 shown in FIG. 27 is displayed.

Here, a constituting the light emitting device in FIG.
For ×b light emitter units, the first column, the first
The data in the row is U(x, y), the data in the first column, row b is U(x, y+b-1), the data in the a-th column, first row is U(x+a-1, y), Let the a-th column and b-th row be U(x+a-1, y+b-1),
Name all units.

Note that the above x and y are as shown in FIGS. 27 and 28.
It is the same in the figure and is an integer that satisfies the following two conditions: x+a-1≦50 and y+b-1≦40. In other words, the light emitting unit U(x,y) in FIG. 27 and the
The light emitting unit U(x,y) shown in the figure has the same display.

Next, FIG. 29 is a block diagram specifically showing the control circuit indicated by reference numeral 8 in FIG. 1. C.P.
The waveform of the clock pulse input to the terminal is
It is indicated by reference numeral 97 in FIG.

When counter/reset circuit 38 is started by the start trigger signal, analog switch 37 is closed. This causes the clock pulse 97 to cause the main memory addressing counter 8 to
9 and is input to a programmable down counter 87 and a read/write selection pulsing circuit 88 .

As described above, this programmable down counter 87 has parallel pulse outputs Q-1 to
Q-10 is preset.

Therefore, as will be described later, the clock pulses from the time when the clock pulse starts inputting to the main memory addressing counter 89 via the CP terminal and the analog switch 37 until the output pulse from the read/write selection pulsing circuit 88 starts to appear. The number can be controlled.

By providing the hole 27L on the left side of the road map panel 20 so that the number of clock pulses becomes {40×(x-1)+y} shown at the left end of FIG. From address 1 of memory 9 to address {40×(x-1)+y-1}
While specifying up to, the selection pulse generation circuit 88
The output pulse of can be prevented from starting.

To this end, as shown in FIG. 31, an AND gate 88A is provided in the read/write selection pulsing circuit 88, which is opened by the output of the programmable down counter 87 and receives the clock pulse 97.

The output pulse of AND gate 88A is input to first and second counters 88B and 88C.
When the first counter 88B counts b clock pulses (where b is not greater than 40), it inverts its output from low to high.

In addition, the second counter 88C has 40 pieces (27th
After counting clock pulses (equal to the number of light emitter units in the vertical direction of the figure), the output is inverted from low to high and the first counter 88B is cleared. The output of the first counter 88B is inverted by an inverter 88D, and becomes the output pulse of the selective pulsing circuit 88.

That is, the output of the read/write selection pulsing circuit 88 is the first Cb pulse of the 40 clock pulses, as shown by waveform 98 in FIG.
This is a repeated pulse in which only one pulse is high.

This output pulse 98 is supplied to the secondary memory 10 as a write enable input signal, and
It is supplied as a read enable input signal to the main memory 9 via an inverter 86 and is further applied to the secondary memory 10 as a write enable input signal.

Therefore, the data read out from the main memory 9 when the output pulse 98 is high is stored in the sub memory 10.
will be forwarded to.

For example, {40×(x-1)+y} shown in FIG.
The data corresponding to the light emitting units U(x, y) to U(x, y+b-1) in FIG. 27 is transferred by the b pulses immediately following these pulses. Depending on the b pulses generated at , data corresponding to the light emitting unit U(x+1, y) to U(x+1, y+b-1) is transferred.

On the other hand, since the AND gate 96 is opened by the output pulse 98, each of the b pulse groups (shown by a waveform 99 in FIG. 30) is input to the sub-memory address designation counter 90.

As can be seen from the above explanation, the address of the main memory 9 storing the display data of the light emitting unit U(x,y) shown in FIG. 27 {40×(x-1)+
y} is stored at address 1 of the sub-memory for displaying the light emitting unit U(x,y) shown in FIG.

Subsequent b consecutive clock pulses are supplied to the sub-memory addressing counter 90, and the sub-memory 10 is addressed in accordance with the count value. During this time, data transfer from the main memory 9 to the sub memory 10 is continuously executed.

As a result, among the light emitting units on the display board in FIG.
-1) Vertical data up to the row is stored in secondary memory 1
The information is sequentially edited and stored from address 1 of address 0 to address b.

Next, as is clear from the waveform 98 in FIG. 30, addressing of the sub memory 10 is not performed during (40-b) pulses after the b consecutive clock pulses. , data transfer from the main memory 9 to the sub memory 10 is also not performed.

In this way, from then on, addressing of the submemory 10 and data transfer from the main memory 9 to the submemory 10 are performed for the first b clock pulses, followed by (40-b) clock pulses. The operation of pausing is repeated.

On the other hand, the counter/reset circuit 38 is
The number of falling edges of the output pulse 98 of the selection pulse forming circuit 88 is counted, and at the a-th falling edge, the analog switch 37 is opened (placed in a high impedance state).

Therefore, as soon as data input from address 1 to address (a×b) in the sub memory 10 is completed, the programmable down counter 8
7. Clock pulse input to selection pulsing circuit 88 and main memory addressing counter 89 is inhibited.

As a result of the above operations, data for driving the light emitter units in the part surrounded by thick lines among the light emitter units in FIG. 27 are transferred from the main memory 9 to the address 1 to address (a
The data will be sequentially stored in the storage areas up to b).

Therefore, the display of each light emitting unit shown in FIG. 28 is the same as that of the unit with the same name in the group of light emitting units shown in FIG. 27.

As is clear from the above description, according to the present invention, only desired information can be arbitrarily selected from among the road traffic information displayed on the road traffic status display board set in a traffic control center or the like. You can easily select and display local road traffic conditions, and by preparing various local road map panels, you can easily display local road traffic conditions using a single light emitting device. Traffic conditions can be displayed.

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram showing the overall configuration of a road traffic condition display device to which the present invention is applied, and FIG. 2 is a road map that allows a general road map to be used in the road traffic condition display device of FIG. Fig. 3 is a plan view showing an example of a general road map, and Fig. 4 is a schematic plan view for explaining the method of modularizing the road map. A plan view showing an example of a modular road map, FIG. 5 is a plan view of a light emitting device suitable for use in the road condition display device of the present invention, and FIG. 6 is a plan view showing an example of a modularized road map.
FIG. 7 is a plan view showing an example of a modular road map panel used over the light emitting device shown in FIG. 5; FIG. A partially enlarged plan view showing the state in which modularized road map panels are stacked, Figure 8 is the 5th
FIG. 9 is an exploded perspective view showing an example of an on-vehicle road condition display device to which the present invention is applied.
Figure 0 is a plan view showing a specific example of a road map panel printed with a modularized map, and Figure 11 is a
Perspective view of a road map panel similar to Figure 10, 1st
2 is a perspective view showing an example of the light emitting state of the light emitting device shown in FIG. 9, FIG. 13 is a sectional view taken along line M-M in FIG. 7, and FIG. A partially enlarged view showing an example in which arrow-shaped light emitters emit light to display road congestion when the map panel is used as a road traffic status display board by superimposing it on the light emitting device shown in FIG. 12. , FIG. 15 is a plan view of a road map panel for explaining the function of a hole provided in the panel for identification of a large number of prepared road map panels, and FIG. 17 is a sectional view taken along the Y-Y line in FIG. 15, FIG. FIG. 19 is a block diagram showing a specific example of a circuit for converting the electrical signal pulse shown in FIG. 18 into a pulse output signal for identifying a road map panel in parallel rows, and FIG. FIG. 21 is a cutaway perspective view of the outer case of the light emitting unit, FIG. 22 is a perspective view of the chip-on-board constituting the light emitting unit, and FIG. 23 is FIG. 24. Fig. 24 is a plan view of the light emitting unit, Fig. 25 is a cross-sectional view taken along the Q-Q line.
26 is a diagram showing a specific example of a circuit for specifying the emitted light color of the light emitter unit and selecting the emitted light arrow. FIG. 26 is a waveform diagram for explaining the operation of the circuit shown in FIG. 25. FIG. This is a concept showing an example of how to identify and address each unit in a light-emitting device constructed by arranging 40 light-emitting units vertically and 50 horizontally in a matrix as shown in Fig. 8. 28 shows a case where an arbitrary partial rectangular area is cut out from the light emitting device shown in FIG. 27, which is formed by tightly arranging b light emitting unit units vertically and a number horizontally in a matrix. , a conceptual diagram showing an example of how to identify and address each light emitting unit;
Figure 29 is a block diagram of the control circuit in Figure 1;
Figure 0 is a waveform diagram for explaining the operation of Figure 29,
FIG. 31 is a detailed block diagram of the read/write selection pulsing circuit of FIG. 29. DESCRIPTION OF SYMBOLS 1... Original road traffic condition display board device, 2... Modular circuit, 3... Display memory, 4... Modularized road traffic condition display board, 5... Transmitter, 6
...Receiver, 7...Display area selection switch, 8...
...Control circuit, 9...Main memory, 10...Sub-memory, 11...In-vehicle road traffic status display board, 12...
...In-vehicle display device, 15...Light emitter unit, 1
5A...outer case, 15B...chip on board, 16-19...arrow-shaped light emitting body, 20...road map panel, 21...light emitting device, 22...board,
27L, 27R...Blank hole, 87...Programmable down counter, 88...Read/write selection pulsing circuit, 89...Main memory address designation counter, 90...Sub memory address designation counter, 93...Shift register.

Claims (1)

[Claims] 1. Light emitting device 21 for display board and road map panel 2
0, a memory 10, and a control means, the display board light emitting device 21 has a plurality of light emitting units 15 arranged in a matrix, each of which emit light. The body unit 15 has a rectangular surface, and arrow-shaped light emitters 16 are arranged along each side of the surface.
- 19 are arranged, the memory 10 has a number of memory addresses corresponding to the total number of the light emitting units 15, and the control means drives the reading means and the arrow-shaped light emitters 16 to 19. the reading means reads data stored in the memory 10; the road map panel 20 is disposed in front of the display board light emitting device 21; and the control means. The arrow-shaped light emitter 1 that constitutes the light emitter unit 15 reads the data stored in the memory 10 in the order of the memory address.
A road condition display device characterized by driving and controlling light emitting states 6 to 19.