EP0167445B1 - Anzeigevorrichtung mit, von einer Diodenmatrix, einzeln elektrisch steuerbaren Elementen - Google Patents

Anzeigevorrichtung mit, von einer Diodenmatrix, einzeln elektrisch steuerbaren Elementen Download PDF

Info

Publication number
EP0167445B1
EP0167445B1 EP85401258A EP85401258A EP0167445B1 EP 0167445 B1 EP0167445 B1 EP 0167445B1 EP 85401258 A EP85401258 A EP 85401258A EP 85401258 A EP85401258 A EP 85401258A EP 0167445 B1 EP0167445 B1 EP 0167445B1
Authority
EP
European Patent Office
Prior art keywords
display
diode
display device
diodes
short
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85401258A
Other languages
English (en)
French (fr)
Other versions
EP0167445A1 (de
Inventor
Jacques Le Gars
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
D'etudes Pour Le Developpement Des Productions Electroniques SA Ste
Original Assignee
D'etudes Pour Le Developpement Des Productions Electroniques SA Ste
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by D'etudes Pour Le Developpement Des Productions Electroniques SA Ste filed Critical D'etudes Pour Le Developpement Des Productions Electroniques SA Ste
Priority to AT85401258T priority Critical patent/ATE39193T1/de
Publication of EP0167445A1 publication Critical patent/EP0167445A1/de
Application granted granted Critical
Publication of EP0167445B1 publication Critical patent/EP0167445B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/37—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements
    • G09F9/375—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements the position of the elements being controlled by the application of a magnetic field

Definitions

  • the present invention relates to display devices which consist of unitary electrically controlled display elements which are selectively supplied via a matrix array of diodes; these unitary display elements are for example constituted by pads mounted to pivot between a display position and a rest position, their pivoting being controlled by a relay preferably with double effect; these display elements can also be constituted by light devices.
  • the invention applies more particularly to display panels or devices which are placed in places which are difficult to access or in places which can only be accessed for short and infrequent periods. This is the case in particular, display panels used on motorways and more particularly on motorways or busy urban roads for which interruption of traffic for maintenance reasons risks creating problems and must therefore be limited in duration and frequency.
  • the invention therefore relates to a display device of the type described above in which any failure concerning a display element does not cause disturbances for the rest of the display device and in particular in which the setting short circuit of a control diode does not create stray current in the other display elements.
  • the display device is notably remarkable in that each display element is supplied for each direction of the control current, by two diodes in series and in that, during maintenance operations, the elements of display are supplied at a sufficiently low voltage so that the display elements are not activated and at least equal to a few times the direct voltage drop of a diode and the absorbed current is measured to detect the diodes in short circuit.
  • the maintenance operations are carried out without activating the display devices, which makes it possible to avoid the display of an erroneous or illegible message on the panel during the maintenance operations.
  • the operation of detecting short-circuit diodes is carried out automatically during periods of non-operation of the display device and the result of this operation is recorded.
  • the operation for detecting diodes in short circuit is controlled and controlled by this microprocessor.
  • the display device is part of a set of display devices controlled by a central station to which they are connected by a telecommunications network
  • the result of the operation for detecting diodes in short circuit is forwarded to said central station.
  • the faulty display panels being known in advance, it will suffice to intervene on these faulty devices only, which will further reduce the duration of the necessary interventions.
  • FIG. 1 the diagram of part of the electrical circuit of a display device with electromechanical display elements such as articulated pads (not shown) which can take two positions, one of display in which they are visible on the display panel and the another rest in which they are erased and invisible on the display panel.
  • the movement of these display pads is controlled in both directions, namely towards the display position and towards the rest position by means of a winding (1) supplied by a matrix array of diodes so as to allow the passage of a current in one or the other direction.
  • This network comprises vertical “column” conductors (2) to each of which are connected one of the terminals of the coils (1) of the same column and horizontal “line” conductors (3 and 4); the horizontal conductors (3) are each connected to the second terminal of the coils (1) of the same line by means of a first control diode (5), each of the diodes (5) being connected by the same electrode (for example the anode in the example shown) to the coil (1).
  • each of the conductors (4) is connected to the second terminal of the coils (1) of the same line by means of a diode (6) connected in the opposite direction, that is to say with its cathode connected to the coil (1).
  • Figure (2) which is a diagram similar to that of Figure (1) of a device according to the invention, a second diode is introduced in series with each diode two diodes in series having the same direction of direct conduction.
  • each activation of the display element is controlled by means of two diodes in series, namely the diodes (5 ) and (5 ') for one of the movements and the diodes (6) and (6') for the reverse movement.
  • the voltage 30 V is replaced by a voltage of 5 V, that is to say a voltage equal to approximately 7 times the direct voltage drop of a diode
  • the increase in current resulting from the short-circuiting of a diode and consequently from the suppression of the direct voltage drop of this diode is of the order of 20%, which can easily be detected.
  • the operation for detecting diodes in short circuit is carried out while the device or display panel is not in operation; this operation can be carried out automatically by means of a control device successively testing all the display devices, the result of these tests being recorded so that when the display device can be accessed there is no 'Only replace the defective display elements.
  • this operation of detecting diodes in short circuit can be controlled by this microprocessor.
  • a certain number of display devices are part of a set controlled by a central station to which they are connected by a telecommunication system, this is for example the case of all the display panels motorway or expressway.

Claims (4)

1. Anzeigevorrichtung, insbesondere für schwer zugängliche Einbaustellen, mit elektrisch steuerbaren Einheits-Anzeigeelementen, die über eine Diodenmatrixschaltung selektiv mit Strom versorgbar sind, dadurch gekennzeichnet, dass die Stromversorgung jedes Anzeigeelements (1) in jeder Steuerstromrichtung über zwei in Serie geschaltete Diode (5, 5'), (6, 6') erfolgt und dass bei einem Wartungsvorgang die Anzeigeelemente (1) mit einer Spannung beaufschlagt sind, die so schwach ist, dass die Einheits-Anzeigelemente (1) nicht aktiviert werden, und die mindestens gleich einem Mehrfachen des direkten Spannungsabfalls einer Diode ist derart, dass die bei Kurzschluss einer Diode auftretende Stromzunahme detektiert werden kann.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das Detektieren der kurzgeschlossenen Dioden automatisch während der Ruhezeiten der Anzeigevorrichtung erfolgt und dass das Ergebnis dieses Vorgangs registriert wird.
3. Anzeigevorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass bei einem vorhandenen Mikroprozessor zur Steuerung der Vorrichtung das Detektieren der kurzgeschlossenen Dioden von dem Mikroprozessor gesteuert und durchgeführt wird.
4. Vorrichtung nach einem der Ansprüche 2 oder 3, dadurch gekennzeichnet, dass falls die Anzeigevorrichtung Teil einer Gesamtheit von Anzeigevorrichtungen ist, die von einer Zentralstelle, mit der sie durch ein Telekommunikationsnetz verbunden sind, gesteuert werden, das Detektierungsergebnis an diese Zentralstellung übertragen wird.
EP85401258A 1984-06-25 1985-06-24 Anzeigevorrichtung mit, von einer Diodenmatrix, einzeln elektrisch steuerbaren Elementen Expired EP0167445B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85401258T ATE39193T1 (de) 1984-06-25 1985-06-24 Anzeigevorrichtung mit, von einer diodenmatrix, einzeln elektrisch steuerbaren elementen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8409978 1984-06-25
FR8409978A FR2566565B1 (fr) 1984-06-25 1984-06-25 Dispositif d'affichage comportant des elements unitaires a commande electrique commandes par un reseau matriciel a diodes

Publications (2)

Publication Number Publication Date
EP0167445A1 EP0167445A1 (de) 1986-01-08
EP0167445B1 true EP0167445B1 (de) 1988-12-07

Family

ID=9305394

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85401258A Expired EP0167445B1 (de) 1984-06-25 1985-06-24 Anzeigevorrichtung mit, von einer Diodenmatrix, einzeln elektrisch steuerbaren Elementen

Country Status (5)

Country Link
EP (1) EP0167445B1 (de)
AT (1) ATE39193T1 (de)
CA (1) CA1249890A (de)
DE (1) DE3566744D1 (de)
FR (1) FR2566565B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0438614A1 (de) * 1990-01-23 1991-07-31 Alternative Energy Research Center Inc. Vorrichtung und Methode zur Anzeige von Informationen
DE4024499C1 (de) * 1990-08-02 1991-09-26 Dambach-Werke Gmbh, 7560 Gaggenau, De

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH516204A (de) * 1970-01-21 1971-11-30 Fok Gyem Finommech Elekt Einrichtung zur bildlichen Informationsübertragung, insbesondere zur Information von Reisenden
FR2517999B1 (fr) * 1981-12-15 1985-06-21 Peugeot Outillage Elect Perceuse portative a plusieurs vitesses

Also Published As

Publication number Publication date
ATE39193T1 (de) 1988-12-15
DE3566744D1 (en) 1989-01-12
FR2566565B1 (fr) 1986-11-28
FR2566565A1 (fr) 1985-12-27
CA1249890A (en) 1989-02-07
EP0167445A1 (de) 1986-01-08

Similar Documents

Publication Publication Date Title
EP0955619A1 (de) Verkehrssignalisierungsverwaltungsverfahren
EP0687051B1 (de) Telefonleitungs-Interface-Schutz
EP0244284A1 (de) Statischer Momentanauslöser für einen begrenzenden Leistungsschalter
FR2769988A1 (fr) Transistor a effet de champ de detection ayant une pluralite de pastilles formant source de detection
EP0665479A1 (de) Zusammengesetzter Sicherheitsschalter
FR2484740A1 (fr) Circuit de protection pour un transistor de commutation et son procede de realisation
EP0975025B1 (de) Integrierte schaltungsanordung für photoelektrische umwandlung
EP0167445B1 (de) Anzeigevorrichtung mit, von einer Diodenmatrix, einzeln elektrisch steuerbaren Elementen
FR2552246A1 (de)
FR2541008A1 (fr) Systeme pour controler le fonctionnement des transducteurs de sortie d'une unite centrale de commande et de controle pour des machines et/ou des dispositifs utilisables dans des lignes de production et/ou des lignes d'emballage de produits
FR2821932A1 (fr) Procede et dispositif de detection de defaillance pour un reseau de capteurs
EP0080425A1 (de) Gerät zur Steuerung, Sicherung und Diagnose des elektrischen Netzes eines Kraftfahrzeugs
EP0895671B1 (de) Statisches relais mit zustandserkennung
EP0554195B1 (de) Selbsttätig geschütztes Halbleiterschutzelement
EP0464049A1 (de) Elektrische löschschaltung.
FR2518838A1 (fr) Module de protection pour circuits logiques de telephonie
EP0342101A1 (de) Testschaltung für eine Sicherung eines Geräts zur Messung der Stromstärke
FR2817972A1 (fr) Systeme de detection de defaillance d'un cable dans un reseau arborescent
FR2644259A1 (fr) Dispositif de detection des pannes pour un equipement electronique
FR2548413A1 (fr) Procedes et dispositifs pour eviter des fraudes sur un taxi equipe d'un repetiteur lumineux
FR2772140A1 (fr) Cellule photoelectrique configurable
CA1213007A (fr) Circuit logique "et" a securite intrinseque
FR2770073A1 (fr) Dispositif pour l'affichage de defauts d'un repartiteur telephonique
EP0399983B1 (de) "Not-Aus"-Einrichtung für Industrieinstallation
BE1010688A7 (fr) Interrupteur differentiel.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19860304

17Q First examination report despatched

Effective date: 19871022

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE GB IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19881207

Ref country code: SE

Effective date: 19881207

REF Corresponds to:

Ref document number: 39193

Country of ref document: AT

Date of ref document: 19881215

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3566744

Country of ref document: DE

Date of ref document: 19890112

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19890630

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19910521

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19910531

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19910614

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19910628

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19910630

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19910821

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19920624

Ref country code: GB

Effective date: 19920624

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19920630

Ref country code: CH

Effective date: 19920630

Ref country code: LI

Effective date: 19920630

BERE Be: lapsed

Owner name: SOC. D'ETUDES POUR LE DEVELOPPEMENT DES PRODUCTIO

Effective date: 19920630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19930101

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19920624

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19930302