EP0533965A1 - Elément semi-conducteur pour contrôler un affichage à matrice, p.e. pour un ordinateur de bord d'un véhicule - Google Patents

Elément semi-conducteur pour contrôler un affichage à matrice, p.e. pour un ordinateur de bord d'un véhicule Download PDF

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Publication number
EP0533965A1
EP0533965A1 EP91115775A EP91115775A EP0533965A1 EP 0533965 A1 EP0533965 A1 EP 0533965A1 EP 91115775 A EP91115775 A EP 91115775A EP 91115775 A EP91115775 A EP 91115775A EP 0533965 A1 EP0533965 A1 EP 0533965A1
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EP
European Patent Office
Prior art keywords
characters
patterns
lines
line
column
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Withdrawn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
EP91115775A
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German (de)
English (en)
Inventor
Karl-Heinz Dipl.-Ing. Strobel
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Siemens AG
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Siemens AG
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Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP91115775A priority Critical patent/EP0533965A1/fr
Publication of EP0533965A1 publication Critical patent/EP0533965A1/fr
Withdrawn legal-status Critical Current

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    • 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

Definitions

  • the semiconductor module according to the invention serves to display any messages by means of characters in a display matrix having row lines and column lines in the form of a matrix.
  • the characters to be displayed are generally set. composed of several segments, ie of more or less large and more or less regularly shaped pixels. These segments, which lie at the intersection of the row lines and column lines of the display matrix, can generally. are individually controlled in each case by means of the row signals fed to the row lines and, at the same time, the column signals fed to the column lines so that the characters formed from such segments are displayed. Multiple such character fields next to each other allow a readable message of several characters to be displayed.
  • the display matrix to be controlled therefore contains more or less matrix-like character fields which are divided into segments.
  • These segments can be, for example, the known 7-segment structure for characters, but also any other segment structure of characters, the segments of which are each can be controlled via the row lines and the column lines of the display matrix. It can therefore also be a matter of segments arranged in a matrix-like manner according to FIG. 1.
  • those lines of the display matrix are referred to as "line lines" which are in the display matrix along the direction of the text line to be displayed run. Therefore, the display matrix generally points towards a line of text. much more column lines than row lines.
  • the circuit arrangement of the integrated semiconductor module according to the invention contains a memory, e.g. a read-only memory.
  • This stores pattern data, namely the data for generating the segment patterns of the various characters to be displayed on the character fields.
  • the stored sample data thus correspond to the arrangement of the segments to be controlled within the character fields.
  • the addressing unit of the memory When the addressing unit of the memory receives a character address corresponding to a single character, the memory supplies the pattern data corresponding to this character, specifically for each line line the respective "patterns" which are used to generate the corresponding column signals along this line line. If these patterns, line by line, are read from the memory, then these read pattern data each represent a “sequence” of the individual patterns assigned to the character.
  • all address addresses of the desired characters are therefore sent to the addressing unit in the appropriate order, as a result of which the memory writes the pattern data of these characters into the memory locations of the register unit in the appropriate order. Thereafter, this register unit supplies, while one after the other row line by row line of the display matrix is activated corresponding column signal patterns to the column lines of the display matrix.
  • the register unit attached to the output of the memory can contain as many memory locations as the total number of controllable segments of the display matrix, which means that such a register unit previously loaded from the memory even sequentially quickly and all of the column signal patterns belonging to the characters to be displayed, based on the single currently activated row line of the display matrix, can deliver in parallel.
  • the invention was initially developed for an on-board computer of a motor vehicle, specifically for the display of characters in two Lines of text in an LCD display matrix using a single integrated semiconductor component.
  • the meaning of the invention goes far beyond the original development goal, namely that it can also be applied to other arrangements falling under the generic term mentioned:
  • the invention is namely e.g. can also be used for the control of displays on display matrices which do not represent an LCD display matrix, but which, for example, Lamps are attached at intersections of row lines and column lines controlled in a matrix-like manner.
  • the invention is therefore not limited to use in an on-board computer of a motor vehicle.
  • the invention allows messages to be displayed in which the "line of text", and thus also the "line lines” for this line of text, are not horizontal, but - similarly, for example, as is customary in certain Asian countries - vertically, or at any angle, in relation to the Above and below the individual characters displayed, for example related to the top and bottom of letters and numbers.
  • the invention also allows, intentionally, e.g. for artistic reasons, to display both normal and mirror-inverted characters in the same line of text, or, if necessary, to display only inverted characters.
  • the integrated semiconductor module according to the invention thus contains a circuit arrangement, insofar as the known semiconductor modules, cf. 3, with a memory G, which e.g. a read-only memory G can be.
  • this memory G stores pattern data which represent sequences of patterns from data for generating the sequences of the column signal patterns.
  • a register unit UX, CO, RS is located at the output of the memory G.
  • the semiconductor module according to the invention should, however, also be able to control the LCD display matrix shown in FIG. 2, even if it has character fields constructed exactly in the form of a matrix, each with 8 character lines and 5 character columns.
  • the circuit arrangement shown thus serves to control the display of one or more characters of a message in a total of 40 character fields A0 ... A19, B0 ... B19 of the display matrix.
  • the semiconductor module according to the invention - in so far as the known semiconductor modules - generates at least some of the characters in such a way that the semiconductor module first delivers the pattern data corresponding to the characters to be displayed to the register unit UX, CO, RS.
  • the column control contained in the register unit, cf. RS contains not only a register, but also amplifiers, which match the column signals with those for an LCD display matrix can deliver necessary levels. After loading the memory locations of the column controller RS, these memory locations deliver, as soon as a row line - for example O from Z1 or O from Z - is activated by a row signal on the display matrix, via their amplifiers the associated column signal patterns to the relevant column lines L of the display matrix, to control the segments associated with the row line concerned.
  • the column controller RS sequentially supplies the remaining column signal patterns belonging to the characters to be displayed.
  • the circuit arrangement according to the invention has one or more reversing units, cf. UY, UX, which allow the sequences of the column signal patterns belonging to one or more characters, and / or each of these patterns themselves, either "normally", namely in the corresponding order as stored in the memory G, or in reverse to the mirror image Display matrix. In this way, the characters can be displayed normally or reversed, depending on requirements.
  • the memory G has an addressing unit RR / UY, which, triggered by an address of a character to be displayed - for example for the character field B1 - by means of a counter, which is, for example, directly in the reversing unit UY belonging to the addressing unit or directly attached to the memory G, supplies the associated patterns from the memory G to the register unit UX, CO, RS one after the other.
  • this reversing unit UY can determine the counting direction of the counter differently - forwards or backwards.
  • the reversing unit UX attached to the output of the memory G allows the individual patterns read from the memory G to be reversed in mirror image, whereas the reversing unit UY can only reverse the sequence of these patterns, but not the respective patterns in themselves, in mirror image.
  • This reversing unit UX can also be seen as a component of the register unit attached to the memory output, cf. UX, CO, RS.
  • the reversing unit UX can, through this mirror-inverted reversal of the patterns in itself, display the relevant characters - or if necessary also the relevant blocks of characters - also mirror-inverted around the axis on the display matrix which lies in the direction of the relevant column lines (!) , - which is vertical if the text line in question can be read horizontally!
  • both the reversing unit UY and the reversing unit UX can be attached in the semiconductor module, the invention is not limited to a mirror image reversal alone about a horizontal axis from top to bottom or about a vertical axis from left to right. If both reversing units UX and UY perform mirror-inverted reversals, the characters to be displayed are reversed in a mirror-inverted manner in two respects, namely both about the vertical and about the horizontal axis - i.e. the characters can then be rotated by 180 ° and turned upside down!
  • each is an LCD display matrix, which contains two text lines T1, T2, each with 20 matrix-like character fields B0 ... B19 and A0 ... A19, each controlled by 8 Row lines 0 ... 7, cf. also Z1 / Z2 in FIG. 1 and Z in FIG. 2, as well as controlled via m + 1 column lines 0 ... m, cf. also S1 / S2 or L in FIGS. 1 and 2.
  • the segments are located at those points where row lines Z1, Z2 or Z and column lines L intersect.
  • the segments of each individual character field are therefore always controlled via 5 row lines Z1 or Z2 or Z, and 8 column lines L, at least as long as these characters, as is usually the case, are to be displayed by means of a maximum of eight row lines.
  • the individual character which according to the invention can be displayed by means of a single character address by means of the memory, can in itself also extend over more than a single 8 * 5 character field: for example, it can also extend over four such character fields, eg if this 1 character represents a four-digit text (eg "km / h"). However, it can also only extend over a fraction of such a character field (cf. ",”).
  • the principle of the invention is therefore not only suitable for semiconductor modules which, with each character address, can display a single character completely only in a single character field of a predetermined size - here 8 * 5 as an example.
  • the column lines S1, S2, cf. L should not cross each other, considered individually, on the panes of the LCD display matrix, and likewise the row lines Z1, Z2 and Z, viewed individually - because, depending on the characters to be displayed, different control signals are applied individually these lines Z1, Z2, Z, S1 and S2 or L must be delivered. But the segments are where the row lines intersect with the column lines. Accordingly, the connections V shown in FIG. 2, via which the line lines of the two lines of text are connected to one another in this new configuration of an LCD display matrix, do not intersect each other.
  • FIG. 2 is an LCD display matrix with two text lines T1, T2, the line lines Z of the first text line T1 being connected in a conductive manner via the connections V to the line lines Z of the second text line T2 with a mirror image reversal of their sequence, that the outermost line, cf. 7, the first line of text T1 conducting with the outermost line, cf. 7, the second line of text T2 is connected, further the second outermost line, corresponding to 6, the first line of text with the second outermost line, corresponding to 6, the second line of text, etc.
  • This LCD display matrix according to FIG. 2 can be labeled with particularly little effort in its two text lines with a single semiconductor module according to the invention, although relatively long pulse durations for controlling the segments are possible in spite of the necessary repetition frequency, compared to the LCD display matrix according to FIG. 1
  • the characters to be displayed can have a particularly strong contrast.
  • the characters to be displayed can optionally be "normal" in both lines of text instead of being upside down in at least one of these two lines of text, for example, by displaying all characters normally in one line of text as stored in memory , but reversed in the other line of text in a mirror image.
  • All of the characters to be displayed, or even a part of these characters, if required, can also be intentionally displayed in reverse mirror image. Likewise, all characters, or if necessary only a part of the characters, can be deliberately reversed in reverse in two respects, namely so that they are upside down for the reader of the message.
  • FIG. 2 appeared to be particularly advantageous, since it has particularly few line signal connections.
  • the starting point of the problem according to the invention therefore originally assumed that the semiconductor module according to the invention should also be able to control an LCD display matrix according to FIG. 2, but which known semiconductor modules cannot readily do this:
  • the configurations of LCD display matrices shown in FIGS. 1 and 2 can in principle be controlled by a single semiconductor module if only the column signal connections of the semiconductor module are connected in an appropriate sequence to the connections of the column signals, and if the column signal patterns emitted by the semiconductor module in each case match the mode of line signal generation.
  • the aim of the invention was to use a single semiconductor module even if the message is to be displayed in two text lines T1, T2, for example.
  • the semiconductor module described in the publication NEC alone controls the display in the two text lines T1, T2 of the LCD display matrix according to FIG. 1, in which the connections W are inserted, cf. H1.
  • a disadvantage of this arrangement is that the semiconductor module H1 must then supply the column signal patterns for 16 row lines Z1, Z2 each with that repetition frequency, that is to say with pulse durations halved compared to 8 row lines Z1, Z2, as a result of which the display contrast suffers.
  • the invention should therefore permit the display to be controlled in two text lines even with a single semiconductor component if the connections W between the column lines S1 and S2 are missing, but instead the connections V are applied between the line lines of the two text lines T1, T2 , and if this avoids that twice as much line signals are to be supplied via separate LDC connections for the line lines, namely for 16 instead of 8 line lines each, cf. Z1, Z2 in FIG. 1 with Z in FIG. 2.
  • the semiconductor module according to the invention should be able to spend more time per segment of a two-line message than if the semiconductor module controls a two-line LCD display matrix according to FIG. 1.
  • the invention therefore aimed to also be able to control a configuration of an LCD display matrix according to FIG. 2: in this configuration, the connections V are in fact attached to the text line end, which is opposite the line signal connections Z, as a result of which this configuration has only a few line signal connections Z.
  • the known semiconductor module which, due to the repetition frequency, can already cause problems in generating a sufficient contrast of a display on an LCD display matrix which has the connections W according to FIG. 1, but is also for an LCD display matrix according to the figure 2 not cheap: Because in the case of the LCD display matrix according to FIG. 2, the sequence of the line lines Z in the first text line T1 is mirror-inverted as in the second text line T2, for example in the case of a message to be read horizontally, the bottom (!) character line O of the first, top text line T1 is simultaneously with the top (!) character line O the lower text line T2 activated.
  • the semiconductor module then simultaneously delivers its corresponding column signal patterns to the column lines, that is to say, for example, exclusively to the column lines S2 with its m + 1 connections 0 ... m, both rows T1, T2, then either the characters of the characters in the upper text line T1 normal, but the one in the lower text line T2 upside down if the same stored pattern data of the characters would be used for both text lines T1, T2.
  • the known module mentioned above is used to control the display and if only a single set of sample data is stored for each character, then as described, one of the two text lines shown in FIG. 2 is upside down. When the LCD display matrix shown in FIG. 2 is controlled, the known semiconductor module would have to store two sets of pattern data for each character to be displayed in order to be able to display all characters of both text lines T1, T1 "normally".
  • FIG. 3 contains further elements that are often useful for displaying the characters: Via the control input D, which is symbolically represented here by only a single line, a string register can be entered RR a sequence of codes, eg immediately the sequence of character addresses, can be entered, which defines the sequence of characters to be displayed one after the other.
  • a control command for each character to be displayed can be entered into a first register RX via the control input D, which control the changeover unit UX as required so that this changeover unit UX reverses the patterns read from the memory G in mirror image or leaves normal.
  • a control command can be entered for each character to be displayed via the control input D in a second register RY, which control the reversing unit UY as required so that this reversing unit UY mirrors the sequence of patterns read from the memory G. reverses or leaves normal.
  • this semiconductor module also contains the sequential control system CC, which coordinates all processes on the semiconductor module, in particular by means of the various multiplexers MUX, each clockable via the clock input CL and controllable via the ENABLE input EN, and, if necessary, also controllable via a synchronization input SY, for example if the the clock input CL input clock should also be re-synchronized with other processes.
  • the sequential control system CC which coordinates all processes on the semiconductor module, in particular by means of the various multiplexers MUX, each clockable via the clock input CL and controllable via the ENABLE input EN, and, if necessary, also controllable via a synchronization input SY, for example if the the clock input CL input clock should also be re-synchronized with other processes.
  • the semiconductor module also contains the row controller RZ, which generates the row signals with suitable levels, and the column controller RS already discussed, which here has 2m + 1 outputs as an example, but maybe even many more outputs than is necessary for the display matrix to be controlled - then this semiconductor device can be used for a multiplicity of different LCD display matrix types.
  • the first reversing unit UY and the second reversing unit UX can have one closely located on the chip , Form a complex reversing unit UY / UX, which acts both on the addressing unit RR / UY and on the register unit UX, CO, RS.
  • the second reversing unit UX together with the register unit UX, CO, RS can form an output unit UX, CO, RS which is spatially closely attached to the chip and which forms a register - cf.
  • RS - contains the memory locations, controlled by switches assigned to the individual memory locations, which deliver the column signals stored there either either normally or in a mirror-inverted manner to the column lines L of the display matrix.
  • the display matrix can also be divided into several sectors in the case of the invention, the displays in each sector being able to be controlled by a separate semiconductor device according to the invention, and then by the way also those Lessons can be applied to which of the above publication - WO-A1-91 / 03807 are removable.

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  • 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)
EP91115775A 1991-09-17 1991-09-17 Elément semi-conducteur pour contrôler un affichage à matrice, p.e. pour un ordinateur de bord d'un véhicule Withdrawn EP0533965A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP91115775A EP0533965A1 (fr) 1991-09-17 1991-09-17 Elément semi-conducteur pour contrôler un affichage à matrice, p.e. pour un ordinateur de bord d'un véhicule

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91115775A EP0533965A1 (fr) 1991-09-17 1991-09-17 Elément semi-conducteur pour contrôler un affichage à matrice, p.e. pour un ordinateur de bord d'un véhicule

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EP0533965A1 true EP0533965A1 (fr) 1993-03-31

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2732496A1 (fr) * 1995-03-31 1996-10-04 Sgs Thomson Microelectronics Procede d'affichage de symboles sur un ecran

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3821730A (en) * 1973-06-14 1974-06-28 Lektromedia Ltd Method and apparatus for displaying information on the screen of a monitor
GB2110857A (en) * 1981-11-10 1983-06-22 Sharp Kk Dot matrix display
EP0124718A1 (fr) * 1983-03-12 1984-11-14 Deutsche Thomson-Brandt GmbH Clavier pour terminaux de vidéotextes et appareils éditeurs
WO1991003807A1 (fr) * 1989-08-31 1991-03-21 Siemens Aktiengesellschaft Circuit integre faisant fonction d'element d'amorçage synchronise d'une matrice d'affichage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3821730A (en) * 1973-06-14 1974-06-28 Lektromedia Ltd Method and apparatus for displaying information on the screen of a monitor
GB2110857A (en) * 1981-11-10 1983-06-22 Sharp Kk Dot matrix display
EP0124718A1 (fr) * 1983-03-12 1984-11-14 Deutsche Thomson-Brandt GmbH Clavier pour terminaux de vidéotextes et appareils éditeurs
WO1991003807A1 (fr) * 1989-08-31 1991-03-21 Siemens Aktiengesellschaft Circuit integre faisant fonction d'element d'amorçage synchronise d'une matrice d'affichage

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN, Band 32, Nr. 9B, Februar 1990, Seiten 158-160, New York, US; "Serial printer bidirectional data-handling technique" *
IBM TECHNICAL DISCLOSURE BULLETIN. Bd. 29, Nr. 5, Oktober 1986, NEW YORK US Seiten 1900 - 1902 'Displaying Overstruck Characters using Programmed Symbols' *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2732496A1 (fr) * 1995-03-31 1996-10-04 Sgs Thomson Microelectronics Procede d'affichage de symboles sur un ecran

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