FR2551241A1 - LUMINOUS DISPLAY DEVICE FOR INFORMATION MESSAGES - Google Patents

Abstract

THE PRESENT INVENTION CONCERNS A DEVICE FOR LUMINOUS DISPLAY OF INFORMATION MESSAGES IN PLACES OF PUBLIC EVENTS. ACCORDING TO THE INVENTION, THE DISPLAY DEVICE1 INCLUDES AN ELECTRONIC CIRCUIT CONTROLLED BY AN IMPACT DETECTOR AND FIXED BEHIND A BASKETBALL PANEL2 TO DISPLAY TO THE DISPLAY SYSTEM10 ANY INFORMATION WHEN THE BASKETBALL PANEL HITS BASKETBALL. THE PRESENT INVENTION IS APPLIED IN PARTICULAR TO THE DISPLAY OF ADVERTISING MESSAGES IN STADIUMS INCLUDING AT LEAST ONE BASKETBALL FIELD.

Description

The present invention relates to a luminous display device of

  information messages in places of public events including sports

such as basketball stadiums.

  There are known light display devices used in basketball stadiums to visualize the mark between two teams in play and the countdown

  the duration of the game stops before the end of the game.

  However, the location of such display devices, generally in the back of the stadium hall for the display device of the mark and on the table where is the timekeeper for the time display device remaining to play, does not always allow players to know where is the mark 15 and know the time remaining to play The information to the players of this information is very important to the extent o the result of a basketball game -ball is often definitive only at the last

second of this match.

  The present invention aims to eliminate the above disadvantages by providing a display device immediately informing the basketball players on the mark and the time remaining to play the game. For this purpose, the invention proposes a device for the luminous display of information messages in places of shows and public events, especially sports events such as stadiums or the like, the device being characterized in that it comprises at least one generatrix. coded characters of each message associated with the

display system.

  According to one characteristic of the invention, the light display is effected through at least one

  transparent basketball boards.

  According to another characteristic of the invention, the luminous display is triggered each time the basketball enters a predetermined space part, in particular adjacent to the basketball board, for example in the goal area, or each time that the balloon cuts a directional wave beam emitted for this purpose

  and established for example at the entrance of the basket.

  According to yet another characteristic of

  Invention, the display is triggered by each shock of the balloon on the basketball board.

  According to one characteristic of the invention, the coded character generator is a programmable read only memory in which several multi-character words corresponding to the displayed messages are stored. The device according to the invention is not limited to the display of the mark and the remaining time to play a basketball game lease but also may display

  sequentially advertising messages.

  The invention will be better understood and other purposes, details, features and advantages thereof

  will become clearer during the description

  explanatory text which follows with reference to the accompanying schematic drawings given solely by way of example illustrating several embodiments of the invention; And wherein: Fig. 1 is a perspective view of a hanging basket panel of the suspended type, behind which is mounted the display device according to the invention; FIG. 2 is an electronic block diagram of the display device according to the invention; FIG. 3 represents another mode of

  realization of the display device according to the invention.

  FIG. 1 represents the display device 1 according to the invention having the shape of a parallelepipedic box located behind a basketball panel 2, of the suspended type, supporting the basket basket 3 is made of a rigid transparent material such that The display device 1 comprises, inside the parallelepipedic box, an electronic circuit which will be detailed later, and a display system 10 characters such as letters, numbers, points, etc. The parallelepipedic box is fixed behind panel 2 so that the display of the characters of the message appears in a rectangle

  substantially above the upper half of the panel 2 and parallel to the upper longitudinal edge of this panel.

  In addition, the housing of the display device is fixed so that the display system is located at a distance for example of about 50 mm prohibiting any contact during smashes or violent aggression on the basket 15 or on the panel. heard, the display device

  can be fully integrated into the basketball board.

  In the present case, the display system consists of a number of displays, for example 10, with points, these displays being designated in FIG. 1 by the references 10a to 1Oj. Each 35-point display consists of a Of course, the present invention is not limited to the dot matrix display system and other display systems, for example of the liquid crystal type, luminescent iodine, laser, fiber

  optical, etc .; can be used.

  The electronic circuit located in the parallelepipedic box of the display device is connected via cables to a power supply device 30 of energy of the device located in a position

  geometric fit for every basketball event.

  In D in Figure 1 is designated a shock detector connected to the electronic circuit of the display device

  and whose role will be explained later.

  It is understood that by the display device 1 of the invention, it is possible to display through each basketball board advertising messages, brand information following the progress of the match, and at the end of each match whenever it is useful

the time remaining to play.

  How are visualized such

  information will be explained later after description

  of the electronic circuit of the display device 1 10 shown in FIG.

  Such a circuit comprises the shock detector D, the output of which is connected to the input of a monostable circuit M 1 having its output Q connected to an AND gate E 1 with two inputs, the second input being connected to a general clock H. The output of the detector D is also connected to the input of another monostable muting circuit M 2, the role of which will be explained below, and having its output Q connected to the detector D. The Q output of the monostable circuit M 1 is connected to an input of an AND gate AND 2 having its second input connected to the second input of the AND gate 1 and thus to the clock H The output of the AND gate 2 is connected to a

  programmable divider DV 1 which is in fact a programmable counter 25 connected to a divider by the NAND gate ND 1.

  The output of the programmable divider DV 1, for example in BCD code, is connected to a BCD decoder circuit DC 1 generating address signals for example on six outputs This decoder DC 1 is connected by its outputs to a programmable read only memory 3 G ME 1 in which are loaded several words of messages with several characters The number of these

  stored message words may for example be equal to 40.

  An encoder wheel system RC is also connected to the programmable memory ME 1 to select in a desired order and determined by the signals from the decoder DC 1 the successive call of the corresponding message words stored in the programmable read-only memory ME 1 and this automatically or manually by an operator. The read-only memory ME 1 serially generates the characters of each message word to be displayed. The output of this read-only memory is connected via a switch CM 1, the role of which will be explained later, to a series-to-series conversion circuit. parallel CV 1 As shown, the conversion circuit CV 1 provides on this

  line the current ASCII code in computer science.

  The seven output lines of the converter CV 1 are applied to a holding circuit MA 1 constituted by seven flip-flops, for example of the type D having their outputs 1 connected via inverters IV 1 to IV 7 to a decoding circuit. A character of the word of the message to be displayed. This decoding circuit comprises five programmable dead memories ME 2 to ME 6, each of these memories attacking on its seven output lines the seven lamps L forming a luminous point of a column of an amplifier. Of course, as is known in itself, the display of a character of a matrix will be done, in this case, by scanning by columns, so horizontally and therefore in five execution times The 25 dead memories PE 2 to ME 6 are of the type capable of decoding the ASCII code available at the output of the holding circuit MA 1. The output of the AND gate 1 is connected to a second divider DV 2, the output of which is connected via the intermediate of 'a first entry NND ND 2 at the clock input

  flip-flops D of the holding circuit MA 1.

  The programmable read-only memory M E1 simultaneously transmits with each coded character an identification signal of this character, this identification signal appearing via a switch CM 2 at the input of a second serial conversion circuit. -parallel CV 2 having

  four output lines providing a BCD coded signal.

  The four output lines of the CV 2 conversion circuit are connected to a BCD decoder with 16 bits of output and referenced by DC 2. As shown in FIG. 2, the 16 output terminals of the decoder DC 2 are available and can be connected. by means of jumpers with sixteen other output terminals connected in common to the second input of the NAND gate ND 2 It is understood that by placing jumpers appropriately on some of the sixteen terminals facing each other, the Decoder DC 2 identifies the BCD code appearing at output di, CV conversion circuit 2 and corresponding to the character number to be displayed. It is understood that other circuits comprising circuits identical to the circuits MA 1, IV 1-IV 7, ME 2-ME 6 are connected to the seven output lines of the conversion circuit CV 1 Thus, since the display system comprises ten 35-point displays, there will be nine other circuits identical to those mentioned above connected to the outputs of the CV conversion circuit 1 Similarly, there will be nine other decoders identical to the DC decoders 2 connected to the four output lines of the conversion circuit CV 2. FIG. 2 also shows the existence of an alphanumeric keyboard CL delivering signals in ASCII code to a programmable random access memory ME 7 also connected to the six output lines of the decoder circuit DC 1 The random access memory ME 7 generates in series ASCII coded characters and applied via the switch CM 1 to the conversion circuit CV 1 The RAM ME 7 also generates, simultaneously with each coded character, a signal bi The identification code applied via the CM switch 2 to the input of the CV conversion circuit 2. It should be noted the presence of two display screens EC 1 and EC 2 serving respectively to display the characters in the process of to be struck on the CL keyboard and the message displayed on the displays at 35

points of the display system.

  The operation of the display device of

  the invention already stems in part from the description made

  above the electronic circuit and will be explained

  briefly below with reference to other features of the invention.

  The display device of the invention is triggered when the basketball comes to hit the basketball panel The shock is detected by the detector D which emits a tripping pulse of the monostable circuit M 1 The output of this circuit monostable 15 passes for a fixed and short duration in state 1 so as to let the clock pulses of the clock H through the AND gates 1 and ET 2 It should be noted that the pulse from the detector D also triggers the monostable circuit M 2 whose output goes low, switches off the power supply of the detector D, thus preventing the detector D from detecting other shocks

  following messages may disturb the display of the message.

  The programmable divider DV 1 divides the clock signals appearing at the output of the AND gate 1 and outputs a BCD binary signal decoded by the decoder DC 1 which emits at each of its outputs an address signal indicative of the order of appearance of the message words to be displayed, RC rouescodeuses selecting the message word encoded in the memory ME 1 according to the order of appearance 30 chosen words messaaes visualize It is understood au' instead of use as shown on FIG. 2, six coding wheels corresponding to the visualization of the six successive messages, a larger number of wheels

  The encoders may be chosen. It will then be necessary to provide a corresponding number of output lines of the decoder DC 1.

  The characters of each word of messages coded in ASCII are then applied via the conversion circuit CV 1 to the inputs of each of the holding circuits MA 1 (10 in number). The programmable divider DV 2 dividing the signal appearing as output of the AND gate 2 determines the display time of each of the message words and, through the NANDND gate 2, acts on the clock input of the D flip-flops of each holding circuit MA 1 so as to maintain output 10 of each of the latches D the logic state applies to the inputs of these flip-flops The ASCII code 10 of the flip-flops D is then decoded by the memories ME 2 to ME 6 which attack each of the 35-point matrices to display bs characters of the word of message coded at the input of each holding circuit MA 1 As already explained above, the identification signal-accompanying each character and coming from the memory M Em is applied to the conversion circuit CV 2 " to be decoded by the decoder DC 2 which

  determines the position of the character on the display of the display system.

  The advertisement display cycle in the manner described above is thus carried out automatically. It should be noted the presence, at the input of the monostable circuit M 1, of a BP push button enabling an operator to act manually. on the display cycle

advertising messages.

  The display time of each message is adjustable by acting for example on the potentiometer Pl of the monostable circuit M 1 from 0.1 to 3 seconds. The duration of the inhibition signal appearing at the output of the monostable circuit M 2 can be performed as being equal to at least twice the viewing time of each

  message and this via the potentiometer P 2.

  It should be noted that the triggering of the advertising display cycle can be effected otherwise than by the detection of a shock on the basketball panel. Thus, it is possible to display advertisements whenever the basketball gets into a predetermined space portion adjacent to the basketball board for example in

  the goal area, using a proximity detector.

  The illuminated display can also be triggered each time the balloon cuts a directional beam.

  issued for this purpose and established, for example, at the entrance to the basket 3.

  It is possible, at the request of an advertiser or other requestor, to view a composite advertising message live from the keyboard CL and store it in the random access memory ME 7. The characters generated by the random access memory ME 7 can then be prioritized, by simply switching the switches CM 1 and CM 2, to the automatic mode to broadcast and view the words of messages not available in the

ROM 1 ME.

  FIG. 2 also shows the presence of an auxiliary input designated by AUX which is intended for information coming from external synchronization sources. Such an external synchronization, of the electronic chronometer type used in basketball, may serve the purpose of visualizing the time remaining. to play in the game Switching to the passage stopwatch takes precedence, taking priority over any other information in automatic or manual mode This switch, to the port'ede the person skilled in the art, must be able to be made from 30 table official mark Of course, the code

  appearing at the auxiliary link must be in ASCII.

  On this auxiliary socket, information relating to the provisional mark may be brought to the progress of the match, such information becoming

  also have priority over all other information.

  FIG. 3 represents an electronic circuit for displaying advertising messages in a predetermined zone of the region of the basketball stadium where the public is located. This display is made from lamps or other discrete luminous elements L, each lamps being supported for example by the head of a spectator The luminous elements are dispersed in the predetermined area and are arranged to form the characters of an advertisement As an example the luminous elements to form a character of the message there are 35 with up to ten characters of messages Of course, it is possible to provide different numbers of characters of messages provided that an advertising message is visible

  when the appropriate light elements are excited.

  Some elements of the electronic circuit

  of FIG. 1 are identical to elements used in the electronic circuit of FIG. 2 and are designated by the same references.

  Thus, there is, designated by M 1, the monostable circuit M 1 triggered by the push button BP which also triggers the monostable circuit M 2 whose output Q inhibits any further action of the push button, for example via a contact of

  relay r, during display of the message word.

  The output of the monostable circuit M 1 is connected to the programmable divider circuit DV 1 via the AND gate 1 which also receives pulses 30 from the clock H The divider DV 1 provides, via the decoder DC 1 , address signals to the programmable read only memory ME 1 representative of the display order of the message words stored in

  This memory is also found, referenced RC 35, the encoder wheel comprising for example six elements.

  During each display cycle triggered by manual action on the BP push button, the memory ME 1 delivers in series, on the one hand, the characters of each message word to be displayed and, on the other hand, the signal of identification associated with each transmitted character A serial-parallel conversion circuit CV 1 is connected to the output of the memory ME 1 on which the characters appear while a conversion circuit CV 2 receives from the memory ME 1 each signal of associated identification

to a character.

  The serial-parallel conversion circuit CV 1 transmits at its output on seven lines a coded signal for example in

  ASCII while the series-parallel conversion circuit CV 2 produces at its output the identification signal encoded in BCD (decimal binary code).

  The seven output lines of the conversion circuit CV 1 are respectively connected to seven generator circuits G 1 to G 7 of a signal of a determined frequency. The generator

  G 1 delivers a signal of a frequency f 1 when it receives from 2 C the output line of the circuit C Vi a high level signal.

  Likewise, the generators G 2 to G 7 respectively produce at their outputs signals of frequencies f 2 to f 7. The four output lines of the conversion circuit CV 2 are respectively connected to four generators G 8 to G11 of a determined frequency The generator G 8 produces at its output a signal of a frequency f 8 when it receives from the corresponding output line of the conversion circuit CV 2 a high level signal, the generators G 9 to G 11

  producing respectively at their outputs signals of frequencies f 9 to f 11.

  Of course, when a low level signal

  appears at one of the inputs of the generators G 1 to G 11, the generator in question produces no output signal.

  These outputs of the generators G 1 to G 11 are applied to an MX multiplexer circuit 1 whose output is connected to an emitter device EM The signals of different frequencies appearing at the output of the multiplexer MX 1 modulate, in a manner known per se, a carrier wave , so as to transmit the signals representative of the character code and the code of the identification signal of each character by modulation, such as for example

  amplitude or frequency modulation.

  On the right-hand side of FIG. 3, there is shown a group of N identical receiving devices each receiving the modulated signal from the transmitter EM. Each receiving device comprises a signal processing circuit for driving a light element L as it will be.

described below.

  In FIG. 3, only a single array of receivers has been shown, but it is understood that there are as many groups of receivers as there are characters of messages to display. for example, each group of receiving devices has a number N of receiving devices equal to 35

  (which corresponds to the 35 luminous elements of a character).

  The modulated signals received by each receiver device are applied, via a band-pass filter F, to a detection and demodulation circuit DEM which delivers at its outputs, on the one hand, the frequency signals defining the code of a character and, on the other hand, the determined frequency signals defining the code of the associated identification signal

to character.

  CV 3 to CV 9 conversion circuits are respectively connected to the seven output lines of the DEM circuit and each converts the received frequency signals into a high level signal, a low level signal being emitted at the output of the converters receiving no signal. Thus, at the output of the converters CV 3 to CV 9, the ASCII code of the character to be displayed is displayed. This coded signal is applied to a decoder DEC by means of a holding circuit MA 'identical to that used in the circuit of FIG. FIG. 2 and constituted for example by D-type flip-flops. In the present case, the decoder DEC is an ASCII-35-point decoder whose outputs are connected so as to excite the light element L via the driver circuit. CA according to

  ASCII code appearing at the inputs of the decoder circuit.

  Four CV-to-CV converters 13 are connected to the outputs of the DEM circuit delivering the identification signal associated with the character to be displayed. Each converter converts the frequency it receives into a high level signal (a low level signal is emitted to each converter if no signal of a given frequency 15 is sent to it). Thus, at the output of the four conversion circuits CV 10-CV 13, the identification signal coded in BCD This coded signal is applied to a decoding circuit formed by for example by a programmable memory ME 8 whose output is connected to a monostable 20 M 3 controlling, through the clock inputs of the D flip-flops, the holding circuit MA 'and for a determined duration corresponding to the display time

  d the light element if excited.

  It goes without saying that the ROM ROM 8 is programmed so as to output an output signal only when it receives only the coded signal BCD corresponding to the coded character appearing at the inputs of the holding circuit MA '. All the dead memories ME 8 of the group of receptive devices shown in FIG. 30 are programmed in the aforementioned manner. For example, assuming that the first character of the word to be displayed is an E, it will appear at the inputs of the holding circuit MA 'and therefore at the inputs of the decoder circuit DEC the ASCII code corresponding to the character E and the coded signal BCD, when identical to the signal encoded in the read-only memory ME 8, will indicate the number of the character to be displayed is the character number 1 In addition, the decoders DEC of the receiving devices of each group have their outputs connected differently, for example by means of jumpers, so as to excite the luminous elements

the character to display.

  The memories of each of the other groups of the receiving devices are programmed so as to indicate aixcircuits for holding the decoders associated with the number of the character of the word to be displayed Of course, under these conditions, each decoder receives the AS CII code of

  one of the other characters of the word to display.

  It is also possible to associate with the electronic circuit of FIG. 3 the keyboard CL and the live memory ME 7 shown in FIG. 2 for displaying, live, at the request of, for example, an advertisement, an advertising message. Of course, the invention is not limited to the arrangement of the circuit described above and other modifications can be made without departing from the scope of the invention. Thus, in the case of the display device on the basketball panel, it is possible to fix above this panel each viewing device, normally located at the diagonal of the basketball court 25 indicating the time remaining to the players of a team before shooting the goal This time remaining for pulling can also be displayed to the display device behind the basketball panel using a timer controlled by a clock operated by a referee judge and the downcounter signals can be applied to the auxiliary input

AUX of Figure 2.

  It is also possible to provide the tape recording of one or more lines of writing to display by scrolling to the display device of Figures 2 and 3 of the commercials Once again, the auxiliary input AUX will be used in this application.

Claims (44)

  1 Display device for displaying information messages in places of spectabl Eset public events, including sports such as stadiums or the like, characterized in that it comprises at least one generator (ME 1); (CL, SE 7) coded characters of each   message and associated with the display system (10).   2 Device according to claim 1, for a stadium comprising at least one basketball court, characterized in that the aforementioned illuminated display   takes place through at least one of the transparent basketball panels.   3 Device according to claim 1 or 2, characterized in that said illuminated display is triggered whenever the basketball ball enters a predetermined portion of space adjacent to the basketball panel (2) for example in the goal area.   4 Device according to one of the claims   preceding, characterized in that the aforementioned light display is triggered each time the basketball cuts a directional beam emitted for this purpose, established for example at the entrance of the basket (3) basketball sign.   Device according to one of claims 1 to 3, characterized in that the above-mentioned illuminated display   is triggered by each shock of the basketball on the basketball board (2).   6 Device according to one of the claims   preceding, characterized in that the aforementioned coded character generator is a programmable read only memory ME 1 in which are stored several words to several   characters corresponding to the messages to be displayed.   7 Device according to claim 6, characterized in that it comprises a selection circuit (TRC, DV 1, DC 1) 35 connected to the above-mentioned memory (ME 1) for choosing in a predetermined order the words to be displayed successively at display system (10).   8 Apparatus according to claim 7, characterized in thatthe aforementioned selection circuit comprises at least one encoder wheel (RC) selecting the code word to be displayed and a programmable divider (DV 1) controlled by a clock (H) and generating signals d address indicative of the order of appearance at the exit of the   memory (ME 1) of the coded words to be displayed.   9 Device according to one of the claims   preceding, characterized in that the successive display of the message words is performed automatically by triggering a first monostable circuit (M 1) whose output is connected to the input of an AND gate (ET 1) having its output connected to the aforesaid programmable divider (DV 1), the other input of the AND gate (ET 1) being connected   at the output of the clock (H) above.   Device according to claim 9,   characterized in that said first monostable circuit (M 1) is triggered by a shock detector (D) of the   basketball ball on the basketball board (2).   11 Device according to one of the claims   preceding, characterized in that it comprises a button   pusher (BP) for manually tripping the first monostable circuit (M 1).   12 Device according to one of the claims   preceding, characterized in that it comprises a second monostable circuit (M 2) connected at the output of the detector of   said shock (D) and inhibiting the operation of the detector E for a predetermined time.   13 Device according to one of the preceding claims,   characterized in that it comprises a second programmable divider (DV 2) connected to the outputs of the first circuit   said monostable (M 1) and clock (H) through an AND gate (ET 2) to determine the display time of each of said message words. 2551241 i   Device according to one of the claims   preceding, characterized in that the aforementioned predetermined inhibition time is greater than the aforementioned display time and is for example equal to twice that. Device according to one of the preceding claims, characterized in that the aforementioned generator (ME 1) also produces, simultaneously with each   encoded character, a character identification signal.   Device according to one of the claims   1 C above, characterized in that each coded character of the generator (ME 1) is decoded by a dead-decode memory circuit (M E 2) (i E 3), (ME 4), MES), (ME 6) attacking the display system (10).   Device according to one of the claims   preceding, characterized in that each coded character is applied to the aforementioned decoding circuit via a holding circuit (MA 1) also receiving the output of the second programmable divider (DV 2) and   the identification signal of said character.   Device according to one of the claims   preceding, characterized in that the coded characters of the generator (ME 1) and the identification signal of each character are issued in series.   Device according to one of the preceding claims, characterized in that the coded characters   series emitted from the generator (ME 1) are applied to each holding circuit (M Al) via a circuit   Serial-to-parallel conversion (CV 1).   Device according to one of the claims   preceding, characterized in that each identification signal of each of the coded characters is applied via a serie-parallel conversion circuit (CV 2) to several decoder circuits (DC 2) each connected to each holding circuit (MA 1) via a NAND'ND gate 2 also receiving the output of the second   programmable divider (DV 2).   21 Device according to one of the claims   preceding, characterized in that said illuminated display system (10) is constituted by   several matrices (10 to 10 j) with 35 light points.   Device according to one of the claims   preceding, characterized in that the abovementioned memory memories of each aforementioned decoding circuit are five in number and each attack seven light points of a column of a aforementioned matrix.   Device according to one of the claims   preceding, characterized in that each said holding circuit (MA 1) is constituted by type D flip-flops whose clock inputs are connected to the output of the aforementioned NAND carrier.   24 Device according to one of the claims   previous, characterized in that it comprises a second generator (CL); Coded characters constituted by a random access memory (ME 7) associated with a keyboard (CL) for   compose and directly display a message mode 20 to the display system (10).   Device according to one of the claims   preceding, characterized in that the aforementioned random access memory of the second generator is connected in parallel with the aforementioned generator (ME 1).   Device according to one of the claims   previous, characterized in that it comprises an auxiliary input (AUX) able to receive information relating to the mark and the time remaining to play the match of basketball.   Device according to Claim 1, characterized in that the aforementioned luminous display is effected in a predetermined zone of the region of the stage where the public is located via elements   discrete luminous (L) each of which is supported by the head 35 of a spectator.   Device according to Claim 1 or 27, characterized in that the coded character generator is a programmable read-only memory (ME 1) in which several multi-character words corresponding to the messages to be displayed are stored.   Device according to one of the claims   1, 27 and 28, characterized in that it comprises a selection circuit (RC), (DV 1), (DC 1) connected to the above-mentioned read only memory (ME 1) so as to choose in a predetermined order the 10 words to be display successively.   Device according to Claim 29, characterized in that the aforementioned selection circuit comprises at least one coding wheel (RC) selecting the coded word to be displayed and a programmable divider (DV 1) controlled by a clock (H) and generating address signals indicative of the order of appearance at the output of the memory coded words to display.   31 Device according to one of the claims   1, 27 to 30, characterized in that the successive display 20 of the message words is performed automatically by triggering a first monostable circuit (Mi) whose output is connected to the input of a gate ETET 1 having its output connected to the aforementioned programmable divider (DV 1),   the other input of the AND gate 1 being connected at the output 25 of the clock (H) above.   Apparatus according to one of claims 1,   27 to 31, characterized in that it comprises a pushbutton (BP) for the manual release of the first said monostable circuit (M 1).   33 Device according to one of claims 1,   27 to 32, characterized in that it comprises a second monostable circuit M 2 triggered by the aforementioned push-button (BP) and inhibiting any subsequent manual action   of this pushbutton during the display of each of the message words.   34 Apparatus according to one of claims 1,   27 to 33, characterized in that the generator (ME 1) also simultaneously produces with each character a character identification signal   Apparatus according to one of claims 1,   27 to 34, characterized in that each message word and the identification signal associated with each coded character of the word are transmitted by air or air and received by a plurality of groups of receiving devices, each of the groups of receiving devices receiving a message. character of the message word and the identification signal associated with this character and exciting some of the light elements (L) to display the character of the word of the message.   36 Device according to one of the claims   1, 27 to 35, characterized in that two seriesparallel conversion circuits (CV 1); (CV 2) are connected to the output of the aforementioned generator (ME 1) and respectively deliver on their output lines the code of each character of the word to be displayed and the code of the identification signal associated with each character, each of the output lines of the two series-parallel conversion circuits being connected to a circuit (G 1 -G 10) generating a determined frequency according to the output level of the associated line, the frequencies of said generators being different from each other   37 Apparatus according to one of the claims   1, 27 to 36, characterized in that the outputs of the aforementioned generators are connected to a multiplexer (MX 1) whose output is connected to a transmitter device (EM) for the transmission by modulation of the frequency signals   determined on the multiplexer.   38 Device according to one of claims 1,   27 to 37, characterized in that each of the receiving devices of each group of receiving devices comprises a detection and demodulation circuit (DEM) delivering the determined frequency signals corresponding to the character to be displayed and the identification signal associated therewith. 39 Apparatus according to claim 38, characterized in that each of the output lines of the aforementioned detecting and demodulating circuit (DEM) is connected to a conversion circuit (CV 3); (CV 4); (CV 5);   (CV 6); (CV 7); (CV 8); (C Vg); (CV 10) (CV 11); (CV 12); (CV 13) of the determined frequency appearing in a logic level.   Device according to one of claims 1,   27 to 39, characterized in that the output lines on which the character code appears are connected   an attacking decoder circuit (DC 3), via a driver circuit (CA), a display light element.   41 Device according to claim 40, characterized in that between said decoder circuit (DC 3) and the conversion circuits (CV 3-CV 9) is interposed a holding circuit (MA ') constituted for example by latches of the type (D), said holding circuit being controlled by the coded identification signal of the   character appearing at the outputs of the converters (CV 10 (CV 13).   42 Apparatus according to claim 41, characterized in that the aforementioned coded identification signal is applied to a programmable read-only memory whose output is connected to a monostable circuit (M 3) controlling   the holding circuit (MA ') mentioned above.   43 Apparatus according to claim 42, characterized in that the aforementioned monostable circuit (M 3) is connected to the clock inputs of the latches (D) of the   holding circuit (MA ') mentioned above.   44 Device according to one of the claims   1, 27 to 43, characterized in that the aforementioned display light elements L) of each character are 35 in number, each group of receiving devices thus comprising 35 receiving devices.   Device according to one of the claims   1, 27 to 44, characterized in that the groups of the device   aforementioned receiver are 10 in number.   46 Apparatus according to one of the preceding claims 10, characterized in that the code of each   character is in (ASCII) and in that the code of each   identification signal is in (BCD).