EP0054451B1 - Dispositif d'affichage à segments et à points, particulièrement applicable à l'écriture arabe - Google Patents

Dispositif d'affichage à segments et à points, particulièrement applicable à l'écriture arabe Download PDF

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Publication number
EP0054451B1
EP0054451B1 EP81401784A EP81401784A EP0054451B1 EP 0054451 B1 EP0054451 B1 EP 0054451B1 EP 81401784 A EP81401784 A EP 81401784A EP 81401784 A EP81401784 A EP 81401784A EP 0054451 B1 EP0054451 B1 EP 0054451B1
Authority
EP
European Patent Office
Prior art keywords
segments
basic pattern
display device
dots
points
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
EP81401784A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0054451A1 (fr
Inventor
Jean-Michel Lefebure
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0054451A1 publication Critical patent/EP0054451A1/fr
Application granted granted Critical
Publication of EP0054451B1 publication Critical patent/EP0054451B1/fr
Expired legal-status Critical Current

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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
    • G09F9/302—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 characterised by the form or geometrical disposition of the individual elements
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G9/00—Visual time or date indication means
    • G04G9/08—Visual time or date indication means by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques

Definitions

  • the invention relates to a display device with segments and dots, particularly applicable to a simplified writing of the Arabic language.
  • Devices for viewing stylized alpha-numeric symbols by displaying line segments are known.
  • the control means of these display devices comprise a limited number of on-off commands which allow simultaneous display of all the symbols of a writing line.
  • These devices include light emitting diodes or liquid crystals which are electrically controlled by two-state signals. These diodes or liquid crystals are arranged in matrices repeating a certain number of times a basic pattern comprising all the segments which can be used to form these alpha-numeric symbols.
  • the simplest conventional display devices comprise matrices, formed by the repetition of the basic pattern with seven segments for the digital display, and fourteen segments for the alpha-numeric display these basic patterns repeated being disjointed. Because the basic pattern is made up of line segments, the curvilinear aspect of classical writing is not rendered, but the graphics are understandable.
  • the subject of the invention is a display device with segments and dots, in particular applicable to the writing of the Arabic language, comprising a matrix formed by the repetition of a simple basic pattern. All the stylized letters of the Arabic alphabet can be written in this matrix.
  • a segment and dot display device comprising a display matrix formed by the repetition, on a writing line, of a basic pattern comprising several line segments and several points and a device of command controlling each of these elements, segment or point, independently, is characterized in that the repetition of the basic pattern is without space, and in that these line segments are three vertical segments located end to end and three or four segments straight horizontal overlapping and of the same length each having a common end with at least one vertical segment, however two points are placed on a horizontal line in the upper third of the basic pattern and two other points are placed on a horizontal line in the lower third of this same basic pattern.
  • the stylized characters displayable in a segment and dot matrix corresponding to the curvilinear Arabic characters must be such that they use a minimum of segments, horizontal segments and vertical segments so that the structure of the resulting matrix is as simple as possible.
  • all characters must be able to be distinguished from each other and can be possibly written in several ways. Indeed, in Arabic writing, letters are often written differently depending on whether they are placed at the beginning, in the middle or at the end of the word or whether they are isolated.
  • Fig. represents a suite of stylized Arabic characters, this stylized suite with simplifications of writing used in Arab countries and understood by their inhabitants.
  • a letter is represented by the same symbol, whatever its position in the word.
  • the letters are stylized into vertical segments of height equal to one third of the maximum height of a letter and into horizontal segments of the width of this pattern, having common ends with the first segments.
  • the points necessary for understanding the letters are placed in the upper third or in the lower third of the height used. In general, these points are placed in relation to the segments in the same way as in classical writing except for two of these letters where the points are inside a square while they are found in classical writing above the loop symbolized by this square.
  • FIGS. 2a and 2b This first embodiment of the basic pattern and the corresponding matrix are represented in FIGS. 2a and 2b.
  • This pattern shown in fig. 2a comprises three vertical segments end to end and four superimposed horizontal segments having a common end with an end of at least one vertical segment. These segments therefore separate the space of a basic pattern into three squares. Two points are placed side by side in the upper square and two other points are placed side by side in the lower square.
  • the matrix shown on. fig. 2b consists of a succession of these basic patterns joined to each other, with no space between them.
  • the stylization of the upper letters which also include dots above is carried out in a different manner.
  • the simplification then consists in representing them with a reduced height, the points then being suitably placed when, as before they are placed in the upper third of the height.
  • the corresponding figuration is shown in parentheses next to the first figuration mode.
  • This figuration brings a simplification in the basic pattern compared to the previous one because the letters which, in the first mode of figuration, include a horizontal segment at the upper limit of the height of the space used are figured differently. Consequently, this segment can be deleted in the basic pattern and each basic pattern only requires ten commands instead of eleven.
  • the basic pattern corresponding to this second figuration and the corresponding matrix are represented in FIGS. 3a and 3b, the matrix being constructed from the basic pattern as for the first embodiment.
  • fig. 4a represents the writing in classical Arabic of the translation of "our book”
  • fig. 4b represents its writing in the display matrices described above.
  • the arrays can be produced for example with light-emitting diodes, with electrically controlled liquid crystals or even for mechanically controlled display devices with double-sided plates capable of being turned over. .
  • the control devices associated with these different types of display matrices are known.
  • the invention is not limited to the figuration of the letters, in the embodiments of the display matrix precisely described, according to the table in FIG. 1.
  • the different letters can be lengthened and stylized on more basic patterns than what has been shown in this figure and can be modified, provided that the modifications introduced are in one or the other of the two embodiments of matrices described and that there is no ambiguity in the writing of these letters.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
EP81401784A 1980-12-02 1981-11-10 Dispositif d'affichage à segments et à points, particulièrement applicable à l'écriture arabe Expired EP0054451B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8025558 1980-12-02
FR8025558A FR2495364A1 (fr) 1980-12-02 1980-12-02 Dispositif d'affichage a segments et a points et systeme de visualisation comportant un tel dispositif

Publications (2)

Publication Number Publication Date
EP0054451A1 EP0054451A1 (fr) 1982-06-23
EP0054451B1 true EP0054451B1 (fr) 1985-05-22

Family

ID=9248574

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81401784A Expired EP0054451B1 (fr) 1980-12-02 1981-11-10 Dispositif d'affichage à segments et à points, particulièrement applicable à l'écriture arabe

Country Status (4)

Country Link
US (1) US4447810A (enExample)
EP (1) EP0054451B1 (enExample)
DE (1) DE3170642D1 (enExample)
FR (1) FR2495364A1 (enExample)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58162190U (ja) * 1982-04-22 1983-10-28 ブラザー工業株式会社 表示装置
JPH0560953A (ja) * 1991-09-03 1993-03-12 Sumitomo Electric Ind Ltd 光伝送用ガラスフアイバ
US7075317B2 (en) * 2004-08-06 2006-07-11 Waters Investment Limited System and method for measurement of small-angle or small-displacement
US7135874B2 (en) * 2004-08-06 2006-11-14 Waters Investments Limited System and method for enhanced measurement of rheological properties
US7292248B2 (en) * 2005-02-01 2007-11-06 Mellema John T Technique for storing and displaying computer text
USD614689S1 (en) 2008-09-02 2010-04-27 Erbe Elektromedizin Gmbh Multi segment display

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1135344A (en) * 1911-06-20 1915-04-13 Gen Engineering And Construction Company Ltd Printing-telegraph alphabet.
FR554133A (fr) * 1922-03-03 1923-06-05 Ets Edouard Belin Alphabet spécial pour messages téléphotographiés
DE2739817A1 (de) * 1977-07-15 1979-01-25 Bbc Brown Boveri & Cie Anzeigevorrichtung
US4271497A (en) * 1977-12-16 1981-06-02 Terzian Berj A Quadri-balanced digital time displays
JPS5571984A (en) * 1978-11-25 1980-05-30 Casio Comput Co Ltd Electronic watch
US4237459A (en) * 1978-12-21 1980-12-02 Eric F. Burtis Visual display with illuminable elements arranged in vertically aligned sections
US4283723A (en) * 1979-05-29 1981-08-11 Motorola Inc. Apparatus and method for providing digital and/or bar graph displays of measured quantities

Also Published As

Publication number Publication date
FR2495364A1 (fr) 1982-06-04
DE3170642D1 (en) 1985-06-27
EP0054451A1 (fr) 1982-06-23
US4447810A (en) 1984-05-08
FR2495364B1 (enExample) 1984-05-04

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