EP0676739A1 - Lichtleitfaser-Anzeigematrix, bei der die Fasern mittels Scheiben mit einer Vielzahl von Sektoren verdeckt werden - Google Patents

Lichtleitfaser-Anzeigematrix, bei der die Fasern mittels Scheiben mit einer Vielzahl von Sektoren verdeckt werden Download PDF

Info

Publication number
EP0676739A1
EP0676739A1 EP95400502A EP95400502A EP0676739A1 EP 0676739 A1 EP0676739 A1 EP 0676739A1 EP 95400502 A EP95400502 A EP 95400502A EP 95400502 A EP95400502 A EP 95400502A EP 0676739 A1 EP0676739 A1 EP 0676739A1
Authority
EP
European Patent Office
Prior art keywords
disc
display
light
control device
discs
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.)
Withdrawn
Application number
EP95400502A
Other languages
English (en)
French (fr)
Inventor
Philippe R. Migny
Pierre A. Passet
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.)
Securite et Signalisation SAS
Ses Inc
Original Assignee
Securite et Signalisation SAS
Ses Inc
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 Securite et Signalisation SAS, Ses Inc filed Critical Securite et Signalisation SAS
Publication of EP0676739A1 publication Critical patent/EP0676739A1/de
Withdrawn legal-status Critical Current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
    • G09F9/305—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 the ends of optical fibres
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S385/00—Optical waveguides
    • Y10S385/901—Illuminating or display apparatus

Definitions

  • the invention relates to a display matrix formed by the downstream ends of a set of optical fibers, the upstream ends of which are arranged to receive light from a light source, of the type in which the downstream ends of the optical fibers are associated.
  • individually or by very small assemblies with occultation discs arranged on the front of the downstream end of the fibers concerned and having a plurality of sectors capable of coming to interpose on the light path in order to modify the color and / or the intensity of the light emitted towards the front of the matrix each of said discs being driven step by step in rotation by an irreversible motor with two stable equilibrium positions whose rotation is controlled by pulses, and in which it is provided a display control device connected to said motors in order to selectively control the rotation of the discs so as to transform will display.
  • the motor comprises a rotor constituted by a small magnet with two poles oriented radially with respect to the axis of rotation, and a stator formed by a magnetizable circuit by impulse in a material with good remanence and having two poles diametrically opposite with respect to the axis of the rotor, the stator comprising near each of its poles an indexing element not aligned with the poles of the stator and intended to destabilize the position of the rotor at the time of a pulse.
  • the stator when the stator receives a pulse opposite to the previous pulse, the rotor turns half a turn, and when the stator receives two successive pulses in the same direction, the second pulse has no effect.
  • the disc When the disc alternately has concealed sectors and identical sectors intended to transmit light, it is connected to the motor shaft by a reduction gear. Light blocking occurs when the motor receives a pulse in a specific direction and light transmission takes place when the pulse is in the opposite direction.
  • the object of the present invention is to provide a display matrix of the type in which the disks can generate several states, which meets this requirement.
  • each occultation disc is associated with at least one device for detecting at least one angular position of said disc, and by the fact that each motor is associated with a activation connected to the display control device via a consistency control device, said consistency control device receiving signals from said detection device and acting on said activation device in the event of a discrepancy between the signals received from the display control device and the signals transmitted by said detection device.
  • Each display element of the matrix thus has its own control member which ensures consistency between the angular position displayed by the corresponding disc and the desired angular position and which controls the rotation of said disc in the event of disagreement.
  • the detection device comprises at least one reflecting element disposed on a concealed sector of the disc and a photoelectric sensor receiving the light reflected by said reflecting element when said concealed sector is in the path of the light emitted by said photoelectric sensor.
  • FIG. 1 represents a display panel element 1 in the form of a display matrix of 7 ⁇ 5 cells, each cell having approximately 28 mm in side.
  • a complete display panel includes several elements 1.
  • each cell ends the downstream end 2 of a light conductor 3 made of optical fiber, fixed by a conventional end piece 4 in part 5, constituting the body of each cell.
  • a concealment disc 6 can rotate on an axis 20 parallel to the axis of the end piece 4.
  • On this disc are arranged a plurality of openings 8, 9, 10 centered on a circumference passing through the axis of the end piece 4 of the light conductor during the rotation of the disc 6.
  • the openings can be provided with colored filters according to the desired result, or free.
  • a plate 11 pierced with holes 12 in the axis of the ends 4 of the conductors 3 can be placed at the front of each cell or of a set of several cells to protect the discs 6.
  • At each cell of the element panel can lead where appropriate the ends of a very small set of optical fibers (for example three or four) coming from one or more light sources which may or may not be lit, associated with the same concealment disc 6, the rotation and the openings of which are calculated as a function of the arrangement of said ends and of the aims sought.
  • Providing several fibers for a disc 6 makes it possible to increase the brightness of the message by increasing the number of light ends operating as a same point of the message, and / or to increase safety in the event of a lamp failure, and / or to provide colored fibers upstream of the fibers and thus to increase the possibilities of changing the color of the message displayed.
  • the occultation disc 6 is rotated about the axis 20 by the rotor of an angular positioning motor 13 with two stable positions.
  • the rotor of the motor 13 is constituted by a small magnet 14 with a high coercive field, magnetized with two poles arranged radially with respect to the axis of rotation 7.
  • the axis 7 drives by a reducing gear 21 the axis 20 of the disc d 'occultation 6.
  • the small magnet 14 can be constituted, in practice, by a small cylinder of diametrically magnetized plastoferrite.
  • the stator 15 consists of a magnetic circuit made of a material with good remanence but a low coercive field. It can have the shape that one wishes, provided that its two poles 16, 17 are presented diametrically relative to the axis 7 of the rotor, at the level of the magnet 14.
  • indexing pins 18, 19 which are two small parts, made of non-retentive magnetic material. They are also located in the plane of rotation of the magnet 14 of the rotor, diametrically opposite, and offset relative to the diameter joining the poles 16 and 17.
  • the short current pulses (typically less than 1 ms) sent by the control unit in one direction or the other in the coil 22 have the effect of stably magnetizing the stator 15, thanks to its remanence.
  • the rotor therefore tends to be positioned so that its N and S poles correspond respectively to the S and N poles of the stator 15.
  • the stable equilibrium position of the rotor is 180 ⁇ from the previous one.
  • a new pulse of a current of the same direction does not modify anything.
  • a new pulse of reverse current again turns the rotor 180 ⁇ in the same direction.
  • the concealment disc 6 is thus driven step by step and always in the same direction by the motor 13.
  • the occultation disc 6 comprises for example several colored sectors 8, referenced from A to E and an occulted sector referenced F and shown in dotted lines.
  • each cell there is provided in each cell, a device for checking the consistency of the angular position of the concealment disc 6 with respect to the desired angular position.
  • FIG. 5 is represented by the reference 30 the device for controlling the display of all the cells, and by the reference 31 the device for activating the coil 22.
  • the consistency control device 32 is interposed between the display control device 30 and the activation device 31.
  • This consistency control device 32 is also connected to a device 33 for detecting the angular position of the occultation disc 6 relative to the end piece 4 of the light conductor.
  • the coherence control device 32 electronically compares the state which the cell must take, with the actual angular position supplied by the detection device 33.
  • the signal at the output of the detection device 33 is coded to represent the state of the disk 6.
  • the activation of the cell is considered good, when there is correspondence between this signal and the image of the requested state which is stored in the electronic memory of the consistency check device 32.
  • the detection device 33 can for example be an electromagnetic device with position coding.
  • This system allows absolute control of the disc position6. This can be obtained from three sensors allowing, by combination, to identify eight positions.
  • a first embodiment may consist in equipping the secondary shaft 20 which drives the concealment disc 6 with three cams judiciously distributed to allow the opening or closing of miniature electrical contacts during the rotation of the shaft 20. The state of the contacts at the end of the rotation gives the image of the position of the disc 6.
  • the detection device 33 can also be produced by introducing into each cell at least one photoelectric component, transmitter and receiver, consisting of a photoelectric sensor 35 which ensures the detection of reflective elements 36 affixed to the back of the disc 6.
  • the reflective elements are advantageously affixed to the occultation sectors F of the disk 6, and the sensor 35 is arranged opposite a disk sector in the stopped position.
  • FIG. 6 there is shown a cell 40 divided into six zones arranged opposite the six sectors of a concealment disc 6.
  • the reference 41 represents the position of the motor 13
  • the references 42 and 43 represent the possible positions of two photoelectric sensors 35 and the references 44, 45 and 46 the possible positions of the downstream ends of the light conductors.
  • the disc 6 comprises two obscured sectors 50, 60 diametrically opposite, two sectors 51, 61 of color 1 also diametrically opposite and two sectors 52, 62 of color 2.
  • the positions 42 and 43 are arranged 120 ⁇ from each other with respect to the axis of rotation 20 of the disc 6.
  • the position control is imperfect, because there are two positions of the disc 6 which give a different display and that the sensor 35 cannot differentiate.
  • each angular position is identified by conjunction of the states of these two sensors.
  • the disc 6 has four colored sectors 70, 71, 72, 73 and two obscured sectors 50, 60 provided with reflective elements and separated by 120 ⁇ from each other , and two photoelectric sensors 35 are provided in the positions 42 and 43 of the cell 40. It is possible to unambiguously identify three positions of the disc 6, the other three positions resulting in absence of detection.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Optical Transform (AREA)
EP95400502A 1994-04-07 1995-03-09 Lichtleitfaser-Anzeigematrix, bei der die Fasern mittels Scheiben mit einer Vielzahl von Sektoren verdeckt werden Withdrawn EP0676739A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9404106 1994-04-07
FR9404106A FR2718555B1 (fr) 1994-04-07 1994-04-07 Matrice d'affichage à fibres lumineuses oscultables par des disques à plusieurs secteurs.

Publications (1)

Publication Number Publication Date
EP0676739A1 true EP0676739A1 (de) 1995-10-11

Family

ID=9461849

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95400502A Withdrawn EP0676739A1 (de) 1994-04-07 1995-03-09 Lichtleitfaser-Anzeigematrix, bei der die Fasern mittels Scheiben mit einer Vielzahl von Sektoren verdeckt werden

Country Status (5)

Country Link
US (1) US5555339A (de)
EP (1) EP0676739A1 (de)
AU (1) AU681007B2 (de)
CA (1) CA2146513A1 (de)
FR (1) FR2718555B1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6113281A (en) * 1997-01-22 2000-09-05 Davis; James M. Fiberoptic cable apparatus with adjustable filter
US6430666B1 (en) * 1998-08-24 2002-08-06 Motorola, Inc. Linked list memory and method therefor
US6283623B1 (en) 1999-10-27 2001-09-04 Visteon Global Tech., Inc. Method and apparatus for remote lighting
ES2188425B1 (es) * 2001-12-11 2004-10-16 Andar, S.L. Panel matricial de señalizacion vial.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0109328A1 (de) * 1982-11-05 1984-05-23 Securite Et Signalisation Anzeigematrix mit Lichtfasern
GB2148570A (en) * 1982-12-24 1985-05-30 Mitsubishi Rayon Co Illuminated display apparatus
US4794391A (en) * 1983-10-31 1988-12-27 Securite Et Signalisation Display matrix incorporating light-conducting fibers and light-occulting shutters

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3962702A (en) * 1974-03-01 1976-06-08 Jenaer Glaswerk Schott & Gen. Optical fiber display device
US4524271A (en) * 1983-04-21 1985-06-18 Cilco, Inc. Laser blocking shutter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0109328A1 (de) * 1982-11-05 1984-05-23 Securite Et Signalisation Anzeigematrix mit Lichtfasern
GB2148570A (en) * 1982-12-24 1985-05-30 Mitsubishi Rayon Co Illuminated display apparatus
US4794391A (en) * 1983-10-31 1988-12-27 Securite Et Signalisation Display matrix incorporating light-conducting fibers and light-occulting shutters

Also Published As

Publication number Publication date
CA2146513A1 (en) 1995-10-08
US5555339A (en) 1996-09-10
FR2718555B1 (fr) 1996-06-28
FR2718555A1 (fr) 1995-10-13
AU1634195A (en) 1995-10-19
AU681007B2 (en) 1997-08-14

Similar Documents

Publication Publication Date Title
CH690463A5 (fr) Codeur optique incrémental.
JP3205569B2 (ja) 表示装置及びリードスイツチ
EP0210913B1 (de) Anzeigezelle für eine Auszugstafel bestehend aus einer Punktmatrix
EP0109328B1 (de) Anzeigematrix mit Lichtfasern
FR2588386A1 (fr) Commutateur optique a commande electromagnetique
EP0115765A1 (de) Drehschalter für optische Wellenführungsschaltung
FR2729493A1 (fr) Dispositif d'affichage electromagnetique et circuits pour sa commande
EP0676739A1 (de) Lichtleitfaser-Anzeigematrix, bei der die Fasern mittels Scheiben mit einer Vielzahl von Sektoren verdeckt werden
EP0046091B1 (de) Datenanzeigevorrichtung
FR2633114A1 (fr) Machine electrique du type moteur electrique sans collecteur comportant un capteur optique
CH690632A5 (fr) Moteur électromagnétique à deux rotors coaxiaux.
FR2820252A1 (fr) Systeme de controle de moteurs sans balais
CA1266973A (fr) Dispositif d'affichage lumineux
FR2829610A1 (fr) Dispositif d'affichage
EP0072303A1 (de) Scheinwerfer mit auf Scheiben montierten Farbschirmen
EP4034929A1 (de) Optische vorrichtung sowie modul mit einer solchen optischen vorrichtung für eine beleuchtungsvorrichtung zur erzeugung von lichteffekten
FR2586129A1 (fr) Dispositif d'affichage et de signalisation a fibres optiques
EP0169116B1 (de) Optisches System mit einem schnellen optischen Kanalwahlschalter
BE1016311A3 (fr) Dispositif d'illumination d'une jante d'un vehicule.
EP0485264B1 (de) Kreiselsystem zum Vermessen der Neigung der Ebene der Achsen des Primaeren und des sekundären Rahmens in Bezug auf die Kreiselackse
BE902443A (fr) Procede pour verifier les donnees d'un dispositif d'affichage et dispositif d'affichage mettant en oeuvre ledit procede.
FR2664728A1 (fr) Dispositif d'occultation de rayon lumineux sans axes mecaniques pour panneaux a messages variables.
WO2024052509A1 (fr) Dispositif lumineux pour projeter une image sur le sol autour d'un véhicule
FR2484098A1 (fr) Obturateur rapide pour camera a fente
EP0022395A1 (de) Permanentmagnet für ein bistabiles Element und bistabiles Element und mit mindestens einem dieser Elemente ausgestattete Datenanzeigeeinheiten

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

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES GB GR IT LI LU MC NL PT SE

17P Request for examination filed

Effective date: 19960318

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 19970129

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19971216