JPS6084594A - Luminous display for information message - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

TECHNICAL FIELD The present invention relates to an apparatus for the luminescent display of informational messages in public fairgrounds, particularly at sporting events such as basketball stadiums.

BACKGROUND ART A basketball player is used to display the score between two teams during a competition and to subtract the timeout period before the end of the competition.
Luminescent displays for use in ball stadiums are known.

However, the location of the score display and the remaining playing time, generally at the edge of the stadium room and at the table where the timekeeping referee is seated, ensures that the players always know the score and the remaining playing time, respectively. Such information is very important to the players, as the result of a basketball game is often not final until the very last moment. OBJECTS OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned deficiencies by providing a display device that immediately informs basketball players of the score and remaining game time.

SUMMARY OF THE INVENTION To this end, the present invention provides a luminescent display device for informational messages in places of entertainment and public events, in particular places of sporting events such as stadiums, which device is a display device and characterized in that it comprises at least one generator of encoded characters of each associated message.

According to one feature of the invention, the luminescent display of at least one
The ball is hit through two transparent basketball back boards.

According to another feature of the invention, the luminous display is displayed each time the ball enters a predetermined spatial location, in particular near the back board, e.g. the goal area, or for this location, e.g. is initiated at each intersection with a directional ray generated at the entrance level of the ray.

According to a further feature of the invention, the display is initiated on each impact of the ball against the back board.

According to another feature of the invention, the encoded character generator is a programmable read-only memory in which a number of words in a number of characters corresponding to the displayed message are stored. The device of the present invention is not limited to displaying only the score or remaining playing time in a basketball game, but can also display promotional messages in sequence.

(13) DESCRIPTION OF THE EMBODIMENTS The present invention, together with other objects, details, features and advantages, will become more apparent as the description proceeds with reference to the drawings, which are given by way of example only and which illustrate several embodiments of the invention. Let's become.

FIG. 1 shows a representation of the invention in the form of a parallelepiped placed behind a hanging basketball back board 2 supporting a basket 3 and made from the transparent rigid material of Plexiglas. Device 1 is shown. This display device 1 includes, in a parallelepiped housing, an electronic circuit, which will be described in detail below, and a device 10 for displaying characters such as letters, numbers, dots, etc. This parallelepiped casing is
fixed behind the back board 2 such that the display of message characters appears within a rectangle disposed substantially above the top half of the back board 2 and parallel to the longitudinal edges of its top; The housing of this display device is arranged such that the display system is placed at a distance of, for example, (14) 50 meters from the basket or back board so that it can come into contact with the basket or back board when subjected to violent motions such as smashes. is fixed.

In theory, this display device can be completely integrated with the back board.

In the above case, the present display system displays a certain number, for example 10
This display is shown in FIG. 1 by reference numbers 10a to 10j. Each 35 point display is constituted by an array of lamps arranged in a matrix of 5 columns by 7 rows. In theory, the present invention is not limited to a 35-point matrix display system; other display systems such as liquid crystal, light emitting diode, laser, fiber optic, and other types can also be used.

The electronic circuits arranged in the parallelepiped housing of this display device are connected via cables to the general energy supply of the device, which is placed in a geometrical position suitable for each basketball game. connected to the device.

Reference numeral D in FIG. 1 indicates an impact transducer connected to the display electronics, the function of which will be explained later.

The display device 1 of the present invention uses each back board of a basketball to display promotional messages, scores as the game progresses, and information regarding the remaining game time at the end of each game and at appropriate times. The manner in which such information may be displayed will be explained following the description of the electronic circuitry of the display device shown in FIG.

Such a circuit includes an impulse transducer D, the output of which is connected to the input of a monostable circuit M1, the output Q of which circuit is connected to an AND/A N D ,/gate 1 (ETI) with two inputs, The second input of that gate is connected to the general purpose clock H.

The output of the impulse transducer D is also connected to the input of a monostable circuit M2 of inhibited operation, whose output Q is connected to the transducer D, the function of which will be explained later.

The output Q of this monostable circuit M1 is such that its second input is AN
The second input of D-gate 1 (ETI) is therefore connected to one input of AND/AND gate 2 (ET2), which is connected to clock H.

The output of AND gate 1 is connected to a programmable divider DVI, which is actually a programmable counter, connected in divide mode by a NAND gate NDI. Programmable divider DVI e.g. BCD
The outputs in the code are connected to a BCD decoder circuit that generates address signals at, for example, six outputs.

This decoder is connected via its output to a programmable read-only memory MEI loaded with a number of mesenji words from a number of letters. The number of words of these stored messages is equal to 40, for example.

The code wheel RC also has an arrangement for selecting successive recalling of the words of the corresponding message stored in the programmable read-only memory MEI in a desired order determined by the signals emitted by the decoder DC1. Program (17) is connected to the enable memory MEI, and this call can be made automatically or manually by the operator.

Said programmable memory MEI sequentially generates the letters of each message word to be displayed. The output of this read-only memory is connected to a serial/parallel converter CVI via a switch CMI whose function will be explained later. As shown, the conversion circuit CVI sends on this line the ASCII code currently used in data processing.

The seven output lines of the converter CVI are, for example, 7 of the D type.
A holding circuit MAI consisting of seven flip-flops is provided, the output of which is connected via inverters IVI to IV7 to a circuit for decoding the letters of the words of the message to be displayed. This decoding circuit energizes seven lamps L, each of which constitutes a column of light spots in a matrix of 35 points on its seven output lines. As is known per se, the display of a character of a matrix is carried out in the present example (18) by column or horizontal scanning, and thus in five execution steps. The read-only memories ME2 to ME6 are of a type capable of decoding the ASCII code that can be used at the output side of the holding circuit MAI.

The output of AND gate 2 (ET2) is the second divider DV2
and its output is connected to the clock input of the D-type flip-flop of the holding circuit MAI via the first NAND input of ND2.

The programmable read-only memory MEI emits, simultaneously with each encoded character, an identification signal for this character, and the identification signal is connected to a second
appears on the input side of the serial-to-parallel conversion circuit CV2 via the switch CM2. The four output lines of this conversion circuit CV2 are connected to a 16-bit output BCD decoder indicated by EC2. As shown in Figure 2, the 16 output terminals of the decoder DC2 are available for use and the 16 other output terminals are connected together via jumpers etc. to the second input of the NAND gate (ND2). can be connected. By placing jumpers appropriately on some of the 16 mutually opposite terminals, the decoder DC2 identifies the B BCD code that appears at the output of the conversion circuit CV2 and corresponds to the number of characters to be displayed.

Thermal theory, circuits MAI, IVI~IV7, other circuits containing the same circuits as ME2~ME6 are connected with the 7 output lines of the conversion circuit Cv1. Thus, the display device has 10
Since there are 35 point displays, there are 9 other circuits connected to the outputs of the conversion circuit Cv1, same as above. There are 9 other decoders same as DC2. As is clear from Figure 2, this is also the decoding circuit DCI.
An alphanumeric keyboard CL is also provided which provides ASCII code signals to a programmable random access memory ME7 connected to the six output lines of the computer. Random access memory ME7 is switch CM
1 to the conversion circuit CV1 via
Generate I encoded characters sequentially. This random access memo IJ-ME7 also generates, at the same time as each coded character, an identifying binary signal which is applied to the input side of the conversion circuit CV2 via the switch CM2.

Shown are two display screens EC1 and EC2 which are arranged to respectively display the characters being typed on the keyboard CL and the messages respectively displayed on the 35-point display of the display system.

The operation of the display device of the invention is partly suggested by the previous description of the electronic circuitry, and other features of the invention are briefly explained below.

The display device of the present invention is triggered when the ball impacts the back board.The impact is detected by transducer D which provides a trigger pulse to monostable circuit M1, the output of which is clocked. is placed in state 1 for a short time to pass the clock pulse from H through AND gates 1 and 2. The pulse sent by transducer D (21) also triggers monostable circuit M2, whose output being placed low cuts off power to transducer D, which could prevent transducer D from displaying the message. It should be understood that certain further impacts are prevented from being detected.

A programmable divider DV 1 divides the clock signal appearing at the output of the AND gate 1 and delivers at its output a BCD signal, which signal is divided according to the selected order of presentation of the words of the message to be displayed. Memo I
An address signal indicating the display order of the words of the displayed message of the code wheel RC for selecting the words of the encoded message in J-MEI is applied to each output thereof.

Instead of using six code wheels corresponding to the display of six consecutive messages, as shown in Figure 2, it is also possible to use a larger number of code wheels, but in this case. , it is necessary to provide the corresponding number of output lines of the decoder DC1.

(22) At this time, the characters of each word of the ASCII encoded message are transferred to each holding circuit MA 1 (the number of characters is 1) via the conversion circuit CVI.
0) is given to the input side.

A programmable divider DV2 which divides the signal appearing at the output of the AND gate 2 determines the display time of each word of the message and divides these flip-flops into the outputs of the respective flip-flops via the NAND gate ND2. acts on the clock input of the D-type flip-flop of each holding circuit MA1 to maintain the logic state given to the input of the holding circuit MA1. D flip-flop ASCII
The code 10 then acts on each matrix of 35 points so as to display the letters of the word of the encoded message at the input of each holding circuit MA1.
It is decoded by J-ME2 to ME6.

As already mentioned, notes IJ-ME accompany each letter.
The identification signal sent by l is applied to a conversion circuit CV2 to be decoded by a decoder DC2 which determines the position of the character on the display of the display device.

(23) Therefore, a cycle of displaying promotional messages in the manner described above automatically occurs. At the input of the monostable circuit M1 there is indicated the presence of a pushbutton BP which allows the operator to manually act on the display cycle of the promotional message.

The display time of each message can be adjusted by operating the potentiometer P1 of the monostable circuit M1, for example, from 01 to 3 seconds. The duration of the inhibit signal appearing at the output of the monostable circuit M2 can be adjusted to a value equal to at least twice the display time of each message, this adjustment being effected by the potentiometer P2.

It will be appreciated that the display cycle of the promotional message may be initiated other than by the detection of the impact of the basketball against the back board. For example, by using a proximity detector for this purpose, a promotional message can be displayed each time the ball enters a predetermined spatial area adjacent to the back board, e.g. the goal area (24). . A luminous indicator can also be activated each time the ball intersects a directional light beam emitted for this purpose and generated, for example, at the level of the entrance to the basket 30.

The advertiser may also request keyboard C at the request of other personnel.
Directly displaying promotional messages formed in L;
This can be stored in a programmable random access memory ME7. Therefore, random
Characters generated by the access memory ME7 can be transferred to the read-only memory ME7 by simply toggling switches CM1 and 0M2, overriding the automatic mode.
1, it is possible to display the words of the message that cannot be used with light emitting light.

As shown in FIG. 2, an auxiliary input designated AUX is also provided which is intended for information from an external synchronization source. External synchronization of electronic timekeeping of the type used in basketball may also be used for purposes of displaying remaining playing time. Switching to timekeeping mode has priority (25) and has priority over other information in either automatic or manual mode. Such switching operations, which will be obvious to those skilled in the art, must be operable from the scoring officer's table.

Of course, the code appearing in the auxiliary link must be an ASCII code.

This auxiliary tap provides information about the instantaneous score during the game, but such information also has priority over all other information. - Shows electronic circuitry for the display of promotional messages at predetermined locations in the ball stadium. Such displays may be provided by lamps or other solid light emitting elements, each lamp being supported, for example, above the heads of the audience. The light emitting elements are distributed at the predetermined locations and arranged to form the characters of the promotional message. For example, to form a message character, the number of light emitting elements would be 35 for at least 10 message characters. Of course, it is possible to provide a different number of message characters so that the promotional message (26) is visible when the light emitting element is energized with sufficient power.

Certain elements of the electronic circuit of FIG. 1 are the same as those used in the electronic circuit of FIG. 2 and are identified by the same reference numbers.

Ml is the pushbutton BP that triggers the monostable circuit M2
monostable circuit M1, but the output Q of circuit M2 inhibits further operation of the pushbutton, for example via relay contact r, during the display of the words of the message.

The output of the monostable circuit M1 is connected to a programmable divider circuit DV1 via an AND gate 1 which also receives pulses sent by the clock H. The divider DV1 provides an address signal to the programmable read-only memory M1 via a decoder DC1 representing the order of presentation of the words of the message stored in this memory. Denoted RC is a code wheel having, for example, six elements.

During each display cycle initiated by manual actuation of the pushbutton BP, the memory ME1 sequentially transmits, on the one hand, the letters of the word of each message to be displayed, and, on the other hand, the memory associated with each letter emitted. Sends an identification signal.

The serial/parallel conversion circuit CVI is a memo IJ on which characters appear.
- It is connected to the output side of MEI, but the conversion circuit CV2 is 1
each identification signal associated with one character is received from the memory ME1.

The serial-to-parallel converter CV 1 sends out signals encoded, for example, in an ASCII code on seven lines at its output, whereas the serial-to-parallel converter CV 2 sends out signals encoded in a BCD code at its output. generate a signal.

The seven output lines of the conversion circuit CVI are connected to seven circuits G1 to G7, each of which generates a signal of a certain frequency. When the generator G1 receives a signal of HΦ level from the output line of the circuit eV1, it sends out a signal of a certain frequency F1. Similarly, generators G2 to G7 produce frequencies F2 to F7, respectively, at their outputs.

The four output lines of the conversion circuit CV2 are connected to four generators G8 to Gll of a certain frequency.

When generator G8 receives a signal of level No. from the corresponding output line of conversion circuit Cv2, it produces a signal of frequency F8 at its output side, and generators G9 to Gll produce a signal of frequency F9 to Fil, respectively, at their output side. generate a signal.

In theory, when a low level signal appears on one of the inputs of a generator G1 to Gll, the generator in question produces no output signal.

These outputs of the generators G1 to Gll are applied to a multiplexing circuit MX1 whose output is connected to the light emitting element EM. The signals of different frequencies appearing at the output of the multiplexing circuit MX1 are processed in a manner known per se so as to emit a signal representing the code of the character and, by modulation, such as amplitude modulation or frequency modulation, the code of the identification signal of each character. modulate the carrier wave at

In the right-hand part of FIG. 3, a group of N identical receiving elements (29) is shown, each receiving a modulated signal from a light emitting element EM. Each receiving element includes signal processing circuitry to energize the light emitting element, as described below.

Although only one group of receiving elements is shown in FIG. 3, it will be appreciated that there are as many receiving device groups as there are characters in the message to be displayed.

Thus, for example, each group has 35 (1
It has N receiving devices equal to 35 light-emitting elements of one letter).

The modulated signal received by each receiving device delivers at its output a frequency signal defining the code of a character on the one hand and a frequency signal defining the code of the identification signal associated with this character on the other hand. Detection and decoding circuit DE
M is given through a bandpass filter F.

The conversion circuits CV3 to CV9 are respectively 7 of the circuit DEM.
It is connected to one output line and converts each received frequency signal into a high level signal, and the low level signal is sent out at the output of the conversion circuit that does not receive the signal. In this way, the ASCII code of the character to be displayed on the output side of the conversion circuits (30) CV3 to CV9 is generated. This encoded signal is transmitted to a holding circuit M, which is composed of many D-type flip-flops, for example, the same as that used in the circuit of FIG.
A' to the detector DEC. In this case, the detector DEC is a 35-point ASCII detector whose output is an ASCII detector appearing at the input side of the decoding circuit.
According to the code, the light emitting element is connected to be energized via the drive circuit CA.

Four conversion circuits cvio to CV13 are connected to the output of the circuit DEM, which delivers identification signals associated with the characters to be displayed. Each conversion circuit converts the frequency it receives into a high level signal (if no signal of a certain frequency is presented to it, a low level signal is sent out in each conversion circuit). , an identification signal encoded in a BCD code appears at the output of the four converter circuits cvio to CV13.This encoded signal is for example a programmable read-only signal whose output is connected to the monostable circuit M3. Memory ME 8
, which controls a holding circuit MA' via the clock input of a D flip-flop, which corresponds to the display time of the light emitting element if it is activated. It takes place at a certain time.

Thermal theory, read-only memory ME 8 is the holding circuit MA'
is programmed to produce an output signal only when it receives a BCD signal corresponding to a coded character appearing at its input. All read-only memories ME 8 of the group of receivers shown in the figure are programmed in the manner described above. For example, if the first letter of the word to be displayed is E, the input side of the holding circuit MA', and hence the input side of the decoding circuit DEC, has an ASCII code corresponding to the letter E.
When the code appears and is the same as the encoded signal in the read-only memo IJ-MK8, the BCD signal will display the number of characters to be displayed, ie character number 1. Furthermore, the decoders DEC of each group of receiving devices have their outputs connected to different states, for example via jumpers, so as to energize the light-emitting elements of the characters to be displayed.

Each memory of the other group of receiving devices is programmed to indicate to the associated decoder holding circuit the number of letters of the word to be displayed. Ideally, under these conditions, each decoder receives one ASCII code for the other letters of the word to be displayed.

It is also possible to associate the keyboard CL and the random access memory ME 7 shown in FIG. 2 with the electronic circuit of FIG. 3, for example in order to directly display promotional messages at the request of an advertiser. .

Naturally, the present invention is not limited to the above-described circuit configuration in any case, and other modifications may be made without departing from the scope of the present invention. For this reason, in the case of display devices on basketball backboards, they are usually placed on the diagonal of the basketball (33) court in order to display the remaining time to the players of the team before a shot at the goal. Display devices located at directionally opposite corners can be fixed above this back board. The remaining time for a shot can also be displayed on a display device located behind the basketball back board by a counter controlled by a clock operated by the referee, and by a subtracting counter. A signal from the auxiliary input AUX of FIG. 2 can also be applied to the auxiliary input AUX of FIG. It is also possible to record on Auxiliary human power AUX will be used again in such applications.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a hanging basketball back board on which the display device of the present invention is mounted; FIG. 2 is an electronic cover diagram of the display device of the present invention; and FIG. The figure shows another embodiment of the display device according to the invention. (34) 1... Display device, 2... Back board, 3...
・Basket, D...Impact transducer, ■
...General-purpose clock, M1-M3...monostable circuit,
DVI, DV2...programmable divider, NDl,
ND2...NAND gate, ME 1~ME6゜ME
8...Programmable read-only memory, CM
1. CM 2 ・, (itch, Cv1~C■13...
・Serial-to-parallel conversion circuit, MA 1...Holding number, IVI
~IV7...Inverter, DCI, DC2...Decoder, ME7...Programmable random access memory, EC1, EC2...Display screen, CL...Keyboard, RC...Code e-wheel , Pl...potentiometer, L...light emitting element, BP...push button, 01~Gll...
Generator circuit, MX 1...Multiplex circuit, EM
...Light emitting element, DEC...Decoder, AUX...
...Auxiliary input. (5 others) (35)

Claims (1)

[Scope of Claims] (1) A device for the luminescent display of information messages in places of public entertainment and entertainment, especially sports events such as stadiums, in which at least one of the coded characters of each message associated with the display device is provided. A device comprising one generator. 2. The apparatus of claim 1, wherein said luminescent display is provided through at least one transparent basketball back board for a stadium including at least one basketball court. 3. A device according to claim 1, wherein the luminous display is initiated each time the ball enters a predetermined spatial position, in particular adjacent to the back board, for example in the goal area. (4) Each time the ball intersects the directional light beam emitted for the display, the light emitting display starts at the level of (1) the entrance of the basket, for example on the back board. The device according to item 1. (5) The device according to claim 1, wherein the light emitting display is initiated each time a ball collides with a back board. (6) The encoded character generator is a programmable read-only memory in which a number of words derived from the characters corresponding to the message to be displayed are stored. Device. (7) The apparatus according to claim 6, further comprising a selection circuit connected to said memory and selecting in a certain order words to be displayed successively on a display device. (8) the selection circuit is controlled by a clock to select at least one code wheel for selecting the coded word to be displayed and the output of the memory of the coded word to be displayed; 7. Apparatus according to claim 7, including a programmable divider for generating address signals indicative of the order in which they appear. (9) said continuous display of the words of the message is automatically carried out by triggering a first monostable circuit, the output of said circuit being connected at its output side to said programmable divider; 2. The apparatus of claim 1, wherein the clock is connected to an input side of an AND gate, the other input of the AND gate being connected to the output side of the clock. 01. The apparatus of claim 9, wherein said first monostable circuit is triggered by a transducer sensitive to impact of a ball against a basketball backboard. 11. The device of claim 1, further comprising a push button for manual triggering of the first monostable circuit. .alpha.'4 Apparatus according to claim 1, further comprising a second monostable circuit connected to the output of the shock-sensitive transducer for inhibiting operation of the transducer for a predetermined period of time. (The first monostable circuit (3
) and a second programmable divider connected to the output of the clock for determining the display time of each word of the message. ←◆ The device according to claim 12, wherein said predetermined prohibition time is longer than said display time, for example equal to twice the display time. (1) The apparatus of claim 1, wherein the generator also generates a character identification signal simultaneously with each encoded character. 2. The apparatus of claim 1, wherein the apparatus is decoded by a circuit comprising a decoding read-only memory for energizing the alpha power so that each encoded character is 17. The apparatus of claim 16, wherein the apparatus is provided to the decoding circuit via a holding circuit for receiving a character identification signal.
) The device according to claim 1, wherein the identification signal is sequentially emitted. 0. The apparatus of claim 1, wherein said encoded characters sequentially emitted by said generator are applied to each holding circuit via a serial-to-parallel conversion circuit. Each identification signal of each coded character is provided to several decoding circuits via a serial-to-parallel conversion circuit, each decoding circuit also receiving a signal from said second programmable divider. 18. The apparatus of claim 17, connected to each holding circuit via a NAND gate receiving the output. Qυ Device according to claim 1, wherein the light emitting display device is constituted by several matrices of 35 light emitting points. (221) The device according to claim 16, wherein the number of read-only memories in each of the decoding circuits is five, each of which energizes seven light emitting points in one column of the matrix. Each of the holding circuits has a clock input of the (5
18. The device according to claim 17, comprising a D-type flip-flop connected to the output side of a NAND gate. 04) A second generator of encoded characters constituted by a keyboard and an associated random access memory for forming and directly displaying a message mode in a display device. The device according to paragraph 1. 25. The apparatus of claim 24, wherein: (c) said random access memory of said second generator is connected in parallel with said generator. 3. The apparatus of claim 2, further comprising an auxiliary input capable of receiving information regarding the score and remaining playing time of a basketball game. (1) The device according to claim 1, wherein the light emitting display is performed by discrete light emitting elements each supported above the heads of the spectators at a predetermined location in the stadium area where the spectators are present. c) The encoded character generator is a programmable read-only memory in which a number of words consisting of a number of letters corresponding to the message to be displayed (6) are stored. The device according to item 1. 2. The apparatus according to claim 1, further comprising a selection circuit connected to said read-only memory for selecting in a certain order the words to be displayed successively. (a) said selection circuit is connected to at least one code wheel for selecting the encoded words to be displayed and to the output side of the memory of the encoded words to be displayed; 30. The apparatus of claim 29, including a programmable divider for generating address signals indicative of the order of appearance. 0. Said continuous display of the words of the message is carried out automatically by triggering a first monostable circuit, the output of said circuit being connected at its output to said programmable divider. 31. The device of claim 30, wherein the input side of the AND gate is connected to the input side of the AND gate, and the other (7) input of the AND gate is connected to the output side of the clock. 32. The device of claim 31, further comprising a push button for manual triggering of the first monostable circuit. 0'3. The device of claim 32, further comprising a second monostable circuit triggered by the pushbutton and inhibiting further manual operation of the pushbutton during the display of each word of the message. Device. 2. The apparatus of claim 1, wherein said generator also produces one character identification signal at the same time for each character. 0→ The identification signal associated with each word of the message and each encoded letter of this word is received by several groups of receiving devices transmitted in an airborne or Hertzian oscillation mode, and each such group of receiving devices receives a certain letter of the message word and an identification signal associated with this letter and energizes some of the light-emitting elements for displaying the letter of the message word. Device. (c) two serial-to-parallel conversion circuits are connected to the output side of the generator, each sending out on its output line the code of each character of the word to be displayed and the code of the identification signal associated with each character; Each output line of the two serial-to-parallel conversion circuits is connected to a circuit that generates a frequency determined by the output level of the associated line, and the frequencies of the generators are different from each other. Apparatus described in section. 0η The output of the generator is connected to one matrix, and the output of the matrix is connected to a transmitting device for modulating and transmitting a signal of a predetermined frequency applied to this matrix. 37. The apparatus of claim 36. (to) Claim 35, wherein each receiving device of each group of receiving devices includes a detection and demodulation circuit for transmitting a signal of a predetermined frequency corresponding to the character to be displayed and the identification signal associated therewith. (9) Device described in Section. 39. The apparatus of claim 38, wherein: (a) each output line of said detection and demodulation circuit is connected to a circuit which converts a predetermined frequency appearing therein to a certain logic level. 40. The apparatus of claim 39, wherein the output line on which the character code appears is connected via a drive circuit to a decoding circuit for driving a light emitting display element. (/4]) A holding circuit constituted by, for example, a D-type 7 lip-flop is inserted between the decoding circuit and the conversion circuit, and the holding circuit is used to generate an encoded signal for character identification appearing on the output side of the conversion circuit. 41. The apparatus of claim 40, which is controlled by: 42. The apparatus of claim 41, wherein said encoded identification signal is provided to a programmable read-only memory whose output is connected to a monostable circuit controlling said holding circuit. @1 Patent (10) The device according to claim 42, wherein the monostable circuit is connected to the clock input side of a D-type flip-flop of the holding circuit. θ→ The number of the light emitting display elements of each character is 35,
28. The apparatus according to claim 27, wherein each group of receiving devices comprises 35 receiving devices. 36. The device according to claim 35, wherein the number of receiving devices in the group is 10. 16. The device according to claim 15, wherein the code of each character is an ASCII code, and the code of each identification signal is a BCD code.