EP0755041A1 - Dispositif de signalisation - Google Patents

Dispositif de signalisation Download PDF

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Publication number
EP0755041A1
EP0755041A1 EP96110778A EP96110778A EP0755041A1 EP 0755041 A1 EP0755041 A1 EP 0755041A1 EP 96110778 A EP96110778 A EP 96110778A EP 96110778 A EP96110778 A EP 96110778A EP 0755041 A1 EP0755041 A1 EP 0755041A1
Authority
EP
European Patent Office
Prior art keywords
elements
lighting elements
light elements
switches
light
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Withdrawn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
EP96110778A
Other languages
German (de)
English (en)
Inventor
Arthur Windisch
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.)
Siemens Schweiz AG
Original Assignee
Siemens Integra Verkehrstechnik AG
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 Siemens Integra Verkehrstechnik AG filed Critical Siemens Integra Verkehrstechnik AG
Publication of EP0755041A1 publication Critical patent/EP0755041A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2085—Special arrangements for addressing the individual elements of the matrix, other than by driving respective rows and columns in combination
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
    • G09G3/06—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources
    • G09G3/12—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources using electroluminescent elements
    • G09G3/14—Semiconductor devices, e.g. diodes

Definitions

  • the present invention relates to a device according to the preamble of patent claim 1.
  • a character from a defined character set In traffic engineering, in particular for rail traffic, signaling devices are increasingly required which allow the optional display of a character from a defined character set.
  • these characters are displayed using a matrix consisting of lighting elements.
  • matrices with 5 x 7 or 7 x 9 lighting elements are common.
  • a driver level assigned to the matrix is e.g. a data byte is supplied, which is converted into corresponding signals for the control of the lighting elements.
  • a disadvantage of these devices is that display errors can occur both during the transmission and implementation of the data and as a result of the failure of lighting elements.
  • a forward channel which is provided for the transmission of control instructions from a computer via control modules to mosaic modules containing lighting elements
  • a return channel from the mosaic modules to the computer is also provided, through which the command and message paths can be checked.
  • the lighting elements themselves are functional.
  • control instructions are supplied to the mosaic modules in a preferred embodiment of the device according to WO 90/07447 (see FIG. 4) divided over two forward channels.
  • the two complementary control instructions are switched between the channels by means of a changeover switch, which means that if a transmission error occurs within the two forward channels, the display flashes.
  • a changeover switch which means that if a transmission error occurs within the two forward channels, the display flashes.
  • a changeover switch is also required, which is actuated regularly and is therefore heavily loaded. If the switch fails, an unsafe situation could occur. If e.g. the switch and at least partially one of the channels could fail, a non-flashing character is displayed that is difficult to distinguish from one of the characters contained in the intended character set.
  • the present invention is therefore based on the object of specifying a safe signal device according to the preamble of patent claim 1, which can be produced with little effort and contains only a few parts which have a safety-relevant error probability.
  • a safe signal device according to the preamble of patent claim 1
  • all elements of the signal device in particular also the lighting elements, should also be taken into account. Errors that are caused by the failure or malfunction of any elements of the signal device should therefore always be recognizable.
  • the signal device according to the invention has a reduced probability of error. Safety-critical situations when errors occur within the signal device are practically completely avoided by the measures according to the invention. If errors occur, the display of characters that can be confused with characters from the specified character set is avoided.
  • Fig. 1 shows a signal device with a matrix DA of lighting elements D1, ..., Dn, which can be activated by switches S1, ..., Sn and via connecting lines a11, a12, a21, a22 ..., an1, an2 with a Power supply unit SSU are connected.
  • the switches S1, ..., Sn are connected to the outputs of a memory circuit M, from which control signals st1, ..., stn are emitted.
  • the memory circuit M e.g. is designed as a shift register, data Din can be fed by a computer. To avoid critical errors, the measures described below can be applied independently of one another, but preferably cumulatively.
  • Light-emitting diodes are preferably used as lighting elements D1, ..., Dn. Via an output of the memory circuit M, the data Dout could also be read back for control purposes in a known manner.
  • LED Light-emitting diodes
  • control signals st1, ..., stn are supplied from the memory circuit M to the control inputs of the switches S1, ..., Sn in such a way that if the control information is incorrectly transmitted or read in, a character is displayed which differs from the characters in the specified character set distinguishes as much as possible. If, for example, a data string has been inserted one position too far into the shift register, the character should not be shifted or distorted, which can lead to misinterpretations, but a character should be shown that is recognized as a false indication.
  • the control signals st are therefore to be mixed in such a way that there is a high average distance between the lighting elements D, which are driven by adjacent control lines st (q), st (q + 1), st (q + 2),.
  • the advantage of this measure is particularly evident when instead of an individual Shift registers multiple memory chips can be used.
  • n / x memory modules could be used, each of which drives x light elements D. If one of these n / x memory modules fails, then x adjacent lighting elements D would not be switched on or off, but x lighting elements D would be switched on or off, which are not suitable for forming a new character due to the maximum distribution within the matrix DA.
  • a displayed character would therefore be less affected by the occurrence of the error.
  • the viewer on the other hand, would find that an error has occurred by the appearance of additional illuminated dots distributed over the display.
  • the irregular distribution of the control lines to the lighting elements D which, for example, are all connected in parallel to a voltage source in the present application, must be taken into account when forming the control data.
  • n / x groups of x light elements D are formed, each of which is connected to one of n / x voltage sources Q. 1-3, 7 groups each with 5 lighting elements D are provided, each group being connected to one of 7 voltage sources Q1,..., Q7.
  • the voltage sources Q1, ..., Q7 are designed such that they only emit a certain maximum voltage or a certain maximum current.
  • the number of lighting elements D per group that can be switched on at the same time is kept at a certain value.
  • the ratio of y / x is preferably in the range from 03, ..., 0.7.
  • the existing lighting elements D1, ..., Dn are Assign n / x groups in such a way that there is a high average distance between the lighting elements D of a group.
  • the memory area of the memory unit M can be divided into n / x blocks with x adjacent memory locations, each of which is one of the n / x groups can be assigned. This is permissible since the lighting elements D of each group are already at a maximum distance.
  • This connection of the n / x groups of x light elements D is shown in FIGS. 1-3. For example, a group from the Illuminated elements D1, D4, D17, D28 and Dn are formed, which are connected in series (FIG. 2) or in parallel (FIG. 3) to the voltage source Q2.
  • the lighting elements D1, D4, D17, D28 and Dn are activated or deactivated by opening or closing a switch S1, S4, S17, S28 and Sn connected in parallel with the lighting elements D1, D4, D17, D28 and Dn . If all switches S1, S4, S17, S28 and Sn are closed, all lighting elements D1, D4, D17, D28 and Dn are switched off. In this case, the current emitted by the voltage source Q2 is limited by the resistor Rb. When switches S1, S17 and S28 are open, the lighting elements D1, D17 and D28 light up.
  • the voltage required for the lighting of the lighting elements D1, D17, D28 and D4 or Dn is undershot, so that all lighting elements D1, D4, D17, D28 and Dn remain deactivated.
  • light emitting diodes are used for the light elements D1, ..., Dn, which require a minimum threshold voltage.
  • the lighting elements D1, D4, D17, D28 and Dn are connected in parallel by closing the switches S1, S4, S17, S28 and Sn. If all switches S1, S4, S17, S28 and Sn are open, all lighting elements D1, D4, D17, D28 and Dn are switched off.
  • switches S1, S17 and S28 When switches S1, S17 and S28 are closed, the lighting elements D1, D17 and D28 light up. If an additional switch S4 or Sn is closed due to a malfunction, the value of the current required by the lighting elements D1, D17, D28 and D4 or Dn exceeds the value of the maximum current that can be supplied by the voltage source Q2, so that all lighting elements D1, D4, D17, D28 and Dn remain deactivated.
  • the connecting lines vl20, vl21, ..., vl25 and vl21a vl21b, ..., vl25b can be seen, through which the lighting elements D1, D4, D17, D28 and Dn within the power supply unit are grouped together.
  • These connecting lines vl20, vl21, ..., vl25 or vl21a, vl21b, ..., vl25b can be hard-wired or optionally switchable by a switching matrix.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)
EP96110778A 1995-07-17 1996-07-04 Dispositif de signalisation Withdrawn EP0755041A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2090/95 1995-07-17
CH209095 1995-07-17

Publications (1)

Publication Number Publication Date
EP0755041A1 true EP0755041A1 (fr) 1997-01-22

Family

ID=4225666

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96110778A Withdrawn EP0755041A1 (fr) 1995-07-17 1996-07-04 Dispositif de signalisation

Country Status (2)

Country Link
EP (1) EP0755041A1 (fr)
NO (1) NO962962L (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2919225A1 (fr) * 2007-08-02 2015-09-16 Koninklijke Philips N.V. Dispositif d'émission de lumière

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3030058A1 (de) * 1980-08-08 1982-03-11 Vdo Adolf Schindling Ag, 6000 Frankfurt Schaltungsanordnung einer leuchtdiodenanzeige
EP0109473A1 (fr) * 1982-11-23 1984-05-30 K-TRON Patent AG Elément optique d'affichage
EP0221786A2 (fr) * 1985-09-30 1987-05-13 Centre D'automatismes Et De Recherches Electroniques Centaure Sarl Panneau d'affichage à matrice de diodes électroluminescentes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3030058A1 (de) * 1980-08-08 1982-03-11 Vdo Adolf Schindling Ag, 6000 Frankfurt Schaltungsanordnung einer leuchtdiodenanzeige
EP0109473A1 (fr) * 1982-11-23 1984-05-30 K-TRON Patent AG Elément optique d'affichage
EP0221786A2 (fr) * 1985-09-30 1987-05-13 Centre D'automatismes Et De Recherches Electroniques Centaure Sarl Panneau d'affichage à matrice de diodes électroluminescentes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2919225A1 (fr) * 2007-08-02 2015-09-16 Koninklijke Philips N.V. Dispositif d'émission de lumière

Also Published As

Publication number Publication date
NO962962D0 (no) 1996-07-15
NO962962L (no) 1997-01-20

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