EP0003307A2 - Dispositif de commande pour l'affichage de textes qui se lisent de gauche à droite ou de droite à gauche - Google Patents

Dispositif de commande pour l'affichage de textes qui se lisent de gauche à droite ou de droite à gauche Download PDF

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Publication number
EP0003307A2
EP0003307A2 EP79100111A EP79100111A EP0003307A2 EP 0003307 A2 EP0003307 A2 EP 0003307A2 EP 79100111 A EP79100111 A EP 79100111A EP 79100111 A EP79100111 A EP 79100111A EP 0003307 A2 EP0003307 A2 EP 0003307A2
Authority
EP
European Patent Office
Prior art keywords
control unit
image control
display
handed
bst
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.)
Granted
Application number
EP79100111A
Other languages
German (de)
English (en)
Other versions
EP0003307A3 (en
EP0003307B1 (fr
Inventor
Martin Heinrich
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 AG
Original Assignee
Siemens 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 AG filed Critical Siemens AG
Publication of EP0003307A2 publication Critical patent/EP0003307A2/fr
Publication of EP0003307A3 publication Critical patent/EP0003307A3/xx
Application granted granted Critical
Publication of EP0003307B1 publication Critical patent/EP0003307B1/fr
Expired 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
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/16—Display of right-to-left language
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G1/00—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data
    • G09G1/04—Deflection circuits ; Constructional details not otherwise provided for

Definitions

  • the invention relates to a circuit arrangement for viewing devices with clockwise writing for the generation of left-handed writing, in particular Semitic writing, which have a display unit and an image control unit that controls this display unit and includes a symbol memory, and in which the image control unit is connected to a data memory.
  • Data display devices e.g. described in German Patent P 25 51 787, are primarily designed for right-handed typefaces.
  • Right-handed font representations are fonts such as the Latin script, in which the writing direction is from left to right.
  • the object of the invention is to provide a circuit arrangement for viewing devices with right-handed writing, which makes it possible in a simple manner to use left-handed writing, e.g. Arabic script.
  • This object is achieved according to the invention in that, in the case of display devices with electron beam deflection, the connections of the image control unit to the horizontal deflection device of the display device are exchanged in such a way that the direction of the horizontal deflection is reversed, and that the information stored in the symbol memory of the image control unit is adapted to this reversed horizontal deflection.
  • the sequence control of the image columns is changed such that the control sequence of the image columns is reversed, the information stored in the symbol memory of the image control unit being adapted to this reversed control device.
  • the invention has the great advantage that the characters of the left-handed Arabic script as the characters of the Latin script can now be stored in the same memory in the data storage.
  • This enables all functions to be implemented in the display device and that relate to a specific organization of the data storage remain unchanged.
  • To change the writing direction it is only necessary to change the device which displays the data storage content on the screen in such a way that the writing direction is reversed.
  • the connections of the horizontal deflection coil are interchanged with magnetic storage on a picture tube.
  • the horizontal deflection plates are interchanged.
  • display devices which operate according to the matrix principle, such as liquid crystal displays, it is only necessary to change the control of the vertical connections, ie the control of the image columns, in such a way that the control sequence is reversed.
  • the data display device DSG shown in FIG. 1 for displaying right-handed Latin fonts contains a display unit AZ for displaying characters.
  • the display unit AZ is provided with a cathode ray tube provided with a screen BS and with deflection amplifiers and control units for brightness control.
  • the data display device DSG contains an image control unit BST with an image generator BG and a symbol memory SYR for generating the shapes of the characters and for formatting the image on the screen BS.
  • the image control unit BST periodically calls up data words assigned to the characters to be displayed from a data memory DSP via a channel with direct memory access. The data words with random access are stored in the data memory DSP.
  • the data memory DSP is connected via a data bus DB to a function control unit FST, which controls the chronological sequence of a representation of characters on the screen, to a transmission channel control unit UK and to an output control unit EA.
  • the transmission channel control unit UK enables the data display device to be connected via various transmission paths, for example via a long-distance line FL, to a central point which is equipped with a data processing system.
  • Various input or output devices such as a keyboard TA or a printer DR, can be connected to the input / output control unit EA.
  • this data display device designed to display right-handed writings for the display of left-handed writings, as e.g. Arabic writings are to be changed.
  • a switching device SE1 is arranged between the image control unit BST and the display unit AZ, which in this case consists of an electron beam tube.
  • the display unit AZ which in this case consists of an electron beam tube.
  • a further symbol memory SYL for the Arabic script is now arranged in the image control unit in addition to the symbol memory SYR for the Latin script.
  • This additional Spmbol memory can be switched on via a further switching device SE2 instead of the symbol memory SYR for Latin fonts.
  • the information stored in the symbol memory for the individual character symbols must of course be adapted to the reverse deflection of the electron beam tube within the symbol memory. For this purpose, the symbols are stored in the symbol memory SYL mirror-inverted.
  • the switches SE1 and SE2 can be operated externally via a switching control unit SS.
  • This switching control unit SS in connection with the switches makes it possible to switch between right-handed and left-handed representation of the text.
  • a display device AZ such as a liquid crystal cell, which is controlled according to the matrix principle.
  • This matrix cell MZ has control units for controlling the image columns BSP and control units for control control of the picture lines BZ.
  • control unit for the image columns via the switch SE1 it is necessary here to control the control unit for the image columns via the switch SE1 in such a way that there is a reversal in the control sequence of the image columns BSP.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
EP19790100111 1978-01-25 1979-01-15 Dispositif de commande pour l'affichage de textes qui se lisent de gauche à droite ou de droite à gauche Expired EP0003307B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2803184 1978-01-25
DE19782803184 DE2803184C3 (de) 1978-01-25 1978-01-25 Schaltungsanordnung für Sichtgeräte mit rechtsläufiger Schriftdarstellung zur Erzeugung von linksläufigen Schriften

Publications (3)

Publication Number Publication Date
EP0003307A2 true EP0003307A2 (fr) 1979-08-08
EP0003307A3 EP0003307A3 (en) 1979-08-22
EP0003307B1 EP0003307B1 (fr) 1981-08-12

Family

ID=6030355

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790100111 Expired EP0003307B1 (fr) 1978-01-25 1979-01-15 Dispositif de commande pour l'affichage de textes qui se lisent de gauche à droite ou de droite à gauche

Country Status (2)

Country Link
EP (1) EP0003307B1 (fr)
DE (1) DE2803184C3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988008603A1 (fr) * 1987-04-30 1988-11-03 Ncr Corporation Procede et appareil pour inverser le balayage recurrent d'un tube cathodique

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2301875A1 (fr) * 1975-02-20 1976-09-17 Omron Tateisi Electronics Co Appareil pour l'affichage d'informations de valeur numerique
FR2320607A1 (fr) * 1975-08-07 1977-03-04 Ibm Agencement de commutation d'un panneau d'affichage porteur de caracteres mobiles

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE849340A (fr) * 1976-12-13 1977-04-01 Ensemble de commande de visualisation de caracteres alphanumeriques

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2301875A1 (fr) * 1975-02-20 1976-09-17 Omron Tateisi Electronics Co Appareil pour l'affichage d'informations de valeur numerique
FR2320607A1 (fr) * 1975-08-07 1977-03-04 Ibm Agencement de commutation d'un panneau d'affichage porteur de caracteres mobiles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988008603A1 (fr) * 1987-04-30 1988-11-03 Ncr Corporation Procede et appareil pour inverser le balayage recurrent d'un tube cathodique

Also Published As

Publication number Publication date
EP0003307A3 (en) 1979-08-22
DE2803184B2 (de) 1979-12-06
DE2803184C3 (de) 1980-08-14
EP0003307B1 (fr) 1981-08-12
DE2803184A1 (de) 1979-07-26

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