EP0298390A1 - Matching a multi-working mode monitor with a personal computer - Google Patents

Matching a multi-working mode monitor with a personal computer Download PDF

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Publication number
EP0298390A1
EP0298390A1 EP88110539A EP88110539A EP0298390A1 EP 0298390 A1 EP0298390 A1 EP 0298390A1 EP 88110539 A EP88110539 A EP 88110539A EP 88110539 A EP88110539 A EP 88110539A EP 0298390 A1 EP0298390 A1 EP 0298390A1
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EP
European Patent Office
Prior art keywords
horizontal
vertical
monitor
values
operating
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Granted
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EP88110539A
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German (de)
French (fr)
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EP0298390B1 (en
Inventor
Gérard Morizot
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Deutsche Thomson Brandt GmbH
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Deutsche Thomson Brandt GmbH
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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
    • 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
    • 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
    • G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G09G5/006—Details of the interface to the display terminal
    • 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
    • G09G1/06—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 using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows
    • G09G1/14—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 using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows the beam tracing a pattern independent of the information to be displayed, this latter determining the parts of the pattern rendered respectively visible and invisible
    • G09G1/16—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 using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows the beam tracing a pattern independent of the information to be displayed, this latter determining the parts of the pattern rendered respectively visible and invisible the pattern of rectangular co-ordinates extending over the whole area of the screen, i.e. television type raster
    • G09G1/165—Details of a display terminal using a CRT, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G09G1/167—Details of the interface to the display terminal specific for a CRT
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/08—Arrangements within a display terminal for setting, manually or automatically, display parameters of the display terminal

Definitions

  • the large number of different personal computers and monitors has resulted in different operating modes being created for the input signals required by the monitors. This circumstance has hitherto prevented any monitors from being easily operated on the same personal computers. Rather, a separate adapter card had to be used for each operating mode.
  • the operating modes differ essentially by their line frequency, image frequency, number of lines, the horizontal and vertical amplitude as well as by their formats that can be used within the screen format.
  • the invention has for its object to provide a method which evaluates operating mode-specific features from the signal of the personal computer intended for the monitor in order to bring about an automatic adaptation of the monitor.
  • the operating values of frequently recurring operating modes are stored. This can be done, for example, by prior setting with test signals, after the end of which the operating values then obtained are transferred to the memory provided for this purpose.
  • the operating values are stored under operating mode-specific addresses, so that when one of the addresses is selected, all required operating values can be tapped at the output of the memory. If it succeeds by evaluating the horizontal and vertical synchronizing signals of the personal computer, the Be clearly to determine the operating mode, the address assigned to this operating mode can be addressed and the operating mode can be set by the corresponding control signals reaching the horizontal and vertical deflection stage of the monitor. Since the setting takes place immediately after the reception of horizontal and vertical synchronizing signals, the required setting time is hardly noticeable for the user.
  • the period duration of the horizontal synchronizing signals is determined by measuring several periods and dividing by the number of synchronizing signals. In this way it is possible to achieve a high measuring accuracy despite the clock frequency of the microprocessor which is in the same order of magnitude as the horizontal frequency, without additional circuits being required.
  • a video test signal is provided to enable an exact setting when the operating values are set for the first time or when the multi-mode monitor is used, which does not require any corrections later. So it is certain that the entire dynamic range can be used by the analog / digital converter. Since the video test signal is essentially used to adjust the amplitude and phase of the horizontal and vertical deflection, a simple structure of the test signals is sufficient for this. It is only important that the corresponding markings are created at precisely defined times, so that there is a connection between the test signals visible on the screen and the specification of the operating values.
  • the video test signals are generated as a serial data stream and are taken from a serial output of a microprocessor.
  • the data stream can be generated by a shift register which was previously loaded in a subroutine in accordance with the intended image pattern and which is started after a main program has been interrupted. The normal program flow can then be continued during the serial data stream. It is enough from restarting the video signal periodically in a subroutine loop after each horizontal synchronizing signal.
  • the invention further relates to a device for adapting a multi-mode monitor to a personal computer.
  • the microprocessor enables the storage of all necessary operating values for the operating modes in question and is also able to evaluate the horizontal and vertical synchronizing signals of the personal computer as a criterion for which operating values are to be set. This can be done by storing the values for the horizontal and vertical synchronizing signal period in a memory and comparing these values with the measured ones. If there is a match, then memory locations can be addressed which contain predetermined operating values and whose addressing causes control signals for setting the operating values to be transmitted to the horizontal and vertical deflection stage of the monitor.
  • the dynamic digital / analog converters provided according to a further development for converting the digital signals into analog signals can be constructed in a very simple manner and can be particularly well connected to microprocessors with normal single output.
  • the process sequence shown in FIG. 1 in the form of a flow chart begins with start 1. After start 1, a decision is made in 2 as to whether the signal arrives at the TTL input. If this is the case, the method is continued in FIG. 3 with the measurement of the horizontal and the vertical frequency. If this is not the case, switch from the TTL input to the analog input in 4 and check in 5 whether the signal now reaches the analog input. If this is the case, the process step under 3 continues, if this is not the case, the TTL input is switched to the analog input in FIG. 6 and the process jumps back to the decision in FIG. 2.
  • the frequency is displayed in FIG. 7 and compared with stored operating values in FIG. It is now checked in FIG. 9 whether an operating value pair has been recognized. If this is the case, the corresponding memories are addressed in FIG. 10 and the memory contents are read out. After a digital-analog conversion of the stored data carried out in FIG. 11, the horizontal and vertical stages are actuated in FIG. 12 by means of corresponding analog control signals.
  • a check 13 is made to determine whether the operating signal has changed. If this is the case, the system jumps back to the start and the process steps described are repeated. If the operating signal is not changed, the keyboard is then scanned in 14 in order to take into account desired values for brightness, contrast, horizontal or vertical amplitude and horizontal or vertical position. Subsequently, it is checked in FIG. 15 whether a video test signal is desired. If this is the case, a video test routine is called in 16 and jumped back to 14 in order to change the corresponding values using the keyboard. If no video test signal is desired, the program jumps back after 13.
  • FIG. 17 If an operating value pair is not recognized in FIG. 9, a branch is made to FIG. 17, where it is checked whether the new pair of horizontal and vertical frequencies should be stored. If this is the case, the storage locations for the deflection stage and the operating values are stored and prepared in FIG. If this is not the case, there is a jump to 13.
  • FIG. 2 From personal computers 20, 21, of which one 20 has a TTL adapter card and the other 21 has an analog adapter card, the signals intended for the monitor reach inputs 22 and 23 of the device 24.
  • the signals are transmitted by a switch 24 and a signal conversion circuit to a microcomputer 25.
  • Video components of the signal also reach a monitor 27 directly via a video stage 26.
  • a control line 28 leads from the microcomputer 25 back to the changeover switch 24, which makes it possible to adapt TTL signals and analog signals to the microcomputer 25 and the monitor 27.
  • the microcomputer 25 includes a CPU 28, a ROM 29 and a RAM 30. In the RAM 30, memory locations are available for different operating modes.
  • the digital / analog converters 31 to 37 pass on control signals to a video stage 26 or a horizontal deflection stage 39 or a vertical deflection stage 40.
  • a display unit 41 and an input unit 42 are also connected to the microcomputer 25. The horizontal and vertical amplitude, the horizontal and vertical position as well as brightness and contrast can be set via the input unit 42.
  • a video test signal can also be activated. If there is interest in holding a pair of frequency values, this can be stored in the RAM 30 using a memory command key.
  • a personal computer with the appropriate operating mode can then be automatically adapted to the other operating modes on the monitor using the pair of values from the horizontal and vertical frequencies.
  • the signals at the input of the microcomputer 25 intended for the monitor are evaluated by the microcomputer 25 with regard to the period of their horizontal and vertical synchronizing signals.
  • This pair of values is compared with pairs of values stored in RAM 30, and if the same pairs of values are identified, the associated memory locations are addressed and then read out.
  • the stored values representing the corresponding operating values are then converted via the digital / analog converters 31 to 37 into corresponding control signals, specifically the control signals of the digital / analog converter 31 determining the brightness and the contrast, those of the analog / digital converters 32 and 35 the horizontal or vertical frequency, those of the digital / analog converters 33 and 36 the horizontal and vertical amplitude and those of the digital / analog converters 34 and 37 the phase position of the horizontal or vertical deflection.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Remote Sensing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)
  • Details Of Television Scanning (AREA)
  • Debugging And Monitoring (AREA)
  • Selective Calling Equipment (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

PCT No. PCT/EP88/00581 Sec. 371 Date Mar. 1, 1989 Sec. 102(e) Date Mar. 1, 1989 PCT Filed Jul. 1, 1988 PCT Pub. No. WO89/00325 PCT Pub. Date Jan. 12, 1989.An adapter for a multiple operating mode monitor automatically controls the horizontal and vertical deflection circuits of the monitor cathode ray tube depending upon the characteristics of the video source to which the monitor is connected. The adapter has a digital memory for storing sets of monitor operating parameters for each of a plurality of predetermined operating modes at selectively addressable locations. A processor evaluates horizontal and vertical synchronizing signals from a video source to which the monitor is connected to identify one of the plurality of predetermined operating modes corresponding to the synchronizing signals. The operating mode may be evaluated and identified by measuring the period of the horizontal and vertical synchronizing signals form the video source. The memory location corresponding to the identified mode of operation is selectively addressed, the selected set of operating parameters, which may be in parallel format, being available as an output to a plurality of dynamic digital to analog converters. The digital to analog converters, which may be synchronized with the vertical frequency, provide analog control signals for the horizontal and vertical deflection circuits. The horizontal and vertical deflection circuits are adjusted responsive to the analog control signals to correspond to the selected set of operating parameters. The operating parameters may include horizontal and vertical frequency, horizontal and vertical amplitude, horizontal and vertical deflection phase position, brightness and contrast.

Description

Die Vielzahl unterschiedlicher Personal Computer und Monitore hat zur Folge gehabt, daß unterschiedliche Betriebs­arten für die von den Monitoren benötigten Eingangssignalen geschaffen wurden. Dieser Umstand hat bisher verhindert, daß beliebige Monitore ohne weiteres an denselben Personal Compu­tern betrieben werden konnten. Vielmehr mußte für jede Be­triebsart eine gesonderte Adapterkarte verwendet werden. Die Betriebsarten unterscheiden sich im wesentlichen durch ihre Zeilenfrequenz, Bildfrequenz, Anzahl der Zeilen, die Hori­zontal- und Vertikalamplitude sowie durch ihre innerhalb des Bildschirmformats nutzbaren Formate.The large number of different personal computers and monitors has resulted in different operating modes being created for the input signals required by the monitors. This circumstance has hitherto prevented any monitors from being easily operated on the same personal computers. Rather, a separate adapter card had to be used for each operating mode. The operating modes differ essentially by their line frequency, image frequency, number of lines, the horizontal and vertical amplitude as well as by their formats that can be used within the screen format.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zu schaffen, welches aus dem für den Monitor bestimmten Signal des Personal Computers betriebsartenspezifische Merkmale aus­wertet, um eine automatische Anpassung des Monitors herbeizu­führen.The invention has for its object to provide a method which evaluates operating mode-specific features from the signal of the personal computer intended for the monitor in order to bring about an automatic adaptation of the monitor.

Diese Aufgabe wird bei einem Verfahren nach dem Oberbegriff des Anspruchs 1 durch die im kennzeichnenden Teil angegebe­nen Merkmale gelöst.This object is achieved in a method according to the preamble of claim 1 by the features specified in the characterizing part.

Bei dem erfindungsgemäßen Verfahren werden die Betriebswerte häufig wiederkehrender Betriebsarten gespeichert. Dies kann z.B. durch vorausgehende Einstellung mit Testsignalen erfol­gen, nach deren Beendigung die dann erhaltenen Betriebswerte in den dafür vorgesehenen Speicher übernommen werden. Die Betriebswerte sind unter betriebsartenspezifischen Adressen gespeichert, so daß bei Anwahl einer der Adressen alle benö­tigten Betriebswerte am Ausgang des Speichers abgreifbar sind. Gelingt es, durch Auswertung der Horizontal- und Verti­kalsynchronsignale des Personal Computers eindeutig die Be­ triebsart zu ermitteln, so kann die dieser Betriebsart zuge­ordnete Adresse angesprochen und die Betriebsart dadurch ein­gestellt werden, das entsprechende Steuersignale an die Ho­rizontal- und Vertikalablenkstufe des Monitors gelangen. Da die Einstellung sofort nach dem Empfang von Horizontal- und Vertikalsynchronsignalen erfolgt, ist die benötigte Einstell­zeit für den Benutzer kaum wahrnehmbar. Dadurch ist es sogar möglich, einen Monitor im laufenden Betrieb einfach auf ei­nen anderen Personal Computer umzuschalten, ohne daß der Be­nutzer sich darum zu kümmern braucht, ob dieser Personal Com­puter die gleiche oder eine andere Betriebsart benutzt. Die Zahl der möglichen Betriebsarten, die in der erfindungsgemä­ßen Art automatisch eingestellt werden können, ist prinzipi­ell unbegrenzt. In der Praxis ist sie jedoch von dem Umfang des Speichers abhängig, der zur Speicherung der Betriebswer­te vorgesehen wird.In the method according to the invention, the operating values of frequently recurring operating modes are stored. This can be done, for example, by prior setting with test signals, after the end of which the operating values then obtained are transferred to the memory provided for this purpose. The operating values are stored under operating mode-specific addresses, so that when one of the addresses is selected, all required operating values can be tapped at the output of the memory. If it succeeds by evaluating the horizontal and vertical synchronizing signals of the personal computer, the Be clearly to determine the operating mode, the address assigned to this operating mode can be addressed and the operating mode can be set by the corresponding control signals reaching the horizontal and vertical deflection stage of the monitor. Since the setting takes place immediately after the reception of horizontal and vertical synchronizing signals, the required setting time is hardly noticeable for the user. As a result, it is even possible to simply switch a monitor during operation to another personal computer without the user having to worry about whether this personal computer uses the same or a different operating mode. The number of possible operating modes that can be set automatically in the manner according to the invention is in principle unlimited. In practice, however, it depends on the amount of memory that is provided for storing the operating values.

Durch die gemäß einer Weiterbildung vorgenommene gemeinsame Auswertung der Horizontal- und Vertikalsynchronsignale kön­nen auch solche Betriebsarten unterschieden werden, die in einem der Werte übereinstimmen. Eine praktische Ausführung sieht vor, die Bestimmung der Periodendauer der Horizontal­synchronsignale durch Messung mehrerer Perioden und Division durch die Anzahl der Synchronsignale erfolgen zu lassen. Auf diese Weise ist es möglich, eine hohe Meßgenauigkeit trotz der in derselben Größenordnung wie die Horizontalfrequenz liegenden Taktfrequenz des Mikroprozessors zu erreichen, oh­ne daß Zusatzschaltungen erforderlich sind.By means of the joint evaluation of the horizontal and vertical synchronizing signals carried out in accordance with a further development, it is also possible to distinguish between operating modes which correspond in one of the values. A practical embodiment provides for the period duration of the horizontal synchronizing signals to be determined by measuring several periods and dividing by the number of synchronizing signals. In this way it is possible to achieve a high measuring accuracy despite the clock frequency of the microprocessor which is in the same order of magnitude as the horizontal frequency, without additional circuits being required.

Besonders vorteilhaft ist es, die Steuersignale für die Ho­rizontal- und Vertikalablenkstufen des Monitors über dynami­sche Digital/Analog-Wandler laufen zu lassen, da hierdurch eine Ansteuerung über den seriellen Ausgang eines Mikropro­zessors möglich ist. Der mit dieser Art von Digital/Analog-­Wandlern verbundene Nachteil, daß bei Abweichungen der Hori­ zontal- oder Vertikalfrequenz von der Umwandlungsfrequenz ein Flimmern oder ein ungleichmäßig helles Bild erzeugt wird, kann dadurch beseitigt werden, daß die dynamischen Di­gital/Analog-Wandler mit der Vertikalfrequenz synchronisiert werden, indem gemäß einer bevorzugten Ausführung bei jeder Periode eine konstante Schrittzahl eingehalten wird.It is particularly advantageous to run the control signals for the horizontal and vertical deflection stages of the monitor via dynamic digital / analog converters, since this enables control via the serial output of a microprocessor. The disadvantage associated with this type of digital / analog converter is that in the event of deviations in the Hori Zontal- or vertical frequency from the conversion frequency, a flickering or an unevenly bright image can be eliminated in that the dynamic digital / analog converters are synchronized with the vertical frequency by maintaining a constant number of steps for each period according to a preferred embodiment.

Um bei der erstmaligen Einstellung der Betriebswerte oder bei Ingebrauchnahme des Mehrbetriebsartenmonitors eine exak­te Einstellung zu ermöglichen , die später keiner Korrektu­ren bedarf, wird ein Videotestsignal vorgesehen. So ist es sicher, daß die ganze Dynamik vom Analog/Digital-Wandler nutzbar ist. Da das Videotestsignal im wesentlichen zur Ein­stellung der Amplitude und Phase der Horizontal- und Verti­kalablenkung dienen soll, reicht hierfür ein einfacher Auf­bau der Testsignale aus. Wesentlich ist nur, daß die entspre­chenden Markierungen zu exakt festgelegten Zeiten entstehen, damit ein Zusammenhang zwischen den auf den Bildschirm sicht­baren Testsignalen und der Vorgabe der Betriebswerte ent­steht.A video test signal is provided to enable an exact setting when the operating values are set for the first time or when the multi-mode monitor is used, which does not require any corrections later. So it is certain that the entire dynamic range can be used by the analog / digital converter. Since the video test signal is essentially used to adjust the amplitude and phase of the horizontal and vertical deflection, a simple structure of the test signals is sufficient for this. It is only important that the corresponding markings are created at precisely defined times, so that there is a connection between the test signals visible on the screen and the specification of the operating values.

Besonders einfach ist es, als Testsignale Balken zu erzeu­gen, die den nutzbaren Bildschirmbereich horizontal und ver­tikal begrenzen. Zur Einstellung der Geometrie können zusätz­liche Balken erzeugt werden. Um auch dies zweckmäßig in ei­nem auch für andere Aufgaben vorgesehenen Mikroprozessor durchführen zu können, werden die Videotestsignale als serieller Datenstrom erzeugt und einem seriellen Ausgang ei­nes Mikroprozessors entnommen. Der Datenstrom kann dabei durch ein Schieberegister erzeugt werden, das vorher in ei­nem Unterprogramm entsprechend dem vorgesehenen Bildmuster geladen wurde und nach Unterbrechung eines Hauptprogramms gestartet wird. Während des seriellen Datenstrom kann dann der normale Programmablauf fortgesetzt werden. Es reicht aus, das Videosignal in einer Unterprogrammschleife peri­odisch nach jedem Horizontalsynchronsignal neu zu starten.It is particularly easy to generate bars as test signals that limit the usable screen area horizontally and vertically. Additional bars can be created to set the geometry. In order to be able to carry this out expediently in a microprocessor which is also provided for other tasks, the video test signals are generated as a serial data stream and are taken from a serial output of a microprocessor. The data stream can be generated by a shift register which was previously loaded in a subroutine in accordance with the intended image pattern and which is started after a main program has been interrupted. The normal program flow can then be continued during the serial data stream. It is enough from restarting the video signal periodically in a subroutine loop after each horizontal synchronizing signal.

Die Erfindung betrifft ferner eine Vorrichtung zur Anpassung eines Mehrbetriebsartenmonitors an einem Personal Computer.The invention further relates to a device for adapting a multi-mode monitor to a personal computer.

Diesbezüglich liegt ihr die Aufgabe zugrunde, eine Vorrich­tung zu schaffen, welche unter Auswertung von Merkmalen des für den Monitor vorgesehenen, dem Personal Computer entstam­menden Signals eine von mehreren wiederkehrenden Betriebsar­ten automatisch einstellt.In this regard, it is the task of her to create a device which automatically adjusts one of several recurring operating modes by evaluating features of the signal provided for the monitor and originating from the personal computer.

Diese Aufgabe wird bei einer Vorrichtung nach dem Oberbe­griff des Anspruchs 17 durch die im kennzeichnenden Teil an­gegebenen Merkmale gelöst.This object is achieved in a device according to the preamble of claim 17 by the features specified in the characterizing part.

Der Mikroprozessor ermöglicht zusammen mit dem Speicher die Speicherung aller erforderlichen Betriebswerte für die infra­ge kommenden Betriebsarten und ist zusätzlich in der Lage, die Horizontal- und Vertikalsynchronsignale des Personal Com­puters als Kriterium dafür auszuwerten, welche Betriebswerte eingestellt werden sollen. Dies kann dadurch geschehen, daß in einem Speicher die Werte für die Horizontal- und Vertikal­synchronsignalperiodendauer gespeichert sind und diese Werte mit den gemessenen verglichen werden. Bei Übereinstimmung können dann Speicherplätze adressiert werden, die vorgegebe­ne Betriebswerte enthalten und durch ihre Adressierung veran­laßt werden, Steuersignale zur Einstellung der Betriebswerte an die Horizontal- und Vertikalablenkstufe des Monitors zu übermitteln.Together with the memory, the microprocessor enables the storage of all necessary operating values for the operating modes in question and is also able to evaluate the horizontal and vertical synchronizing signals of the personal computer as a criterion for which operating values are to be set. This can be done by storing the values for the horizontal and vertical synchronizing signal period in a memory and comparing these values with the measured ones. If there is a match, then memory locations can be addressed which contain predetermined operating values and whose addressing causes control signals for setting the operating values to be transmitted to the horizontal and vertical deflection stage of the monitor.

Die gemäß einer Weiterbildung für eine Umwandlung der Digi­talsignale in Analogsignale vorgesehenen dynamische Digi­tal/Analog-Wandler können sehr einfach aufgebaut sein und lassen sich signalmäßig besonders gut an Mikroprozessoren mit normalem einzelnen Ausgang anschließen.The dynamic digital / analog converters provided according to a further development for converting the digital signals into analog signals can be constructed in a very simple manner and can be particularly well connected to microprocessors with normal single output.

Weiterbildungen und vorteilhafte Ausführungsformen ergeben sich aus den Ansprüchen, der Beschreibung und der Zeichnung, die ein Ausführungsbeispiel der Erfindung veranschaulicht.

  • Fig. 1 zeigt als Diagramm den Verfahrensablauf nach einem Ausführungsbeispiel der Erfindung,
  • Fig. 2 zeigt ein Blockschaltbild einer erfindungsgemäßen Schaltungsanordnung.
Further developments and advantageous embodiments result from the claims, the description and the drawing, which illustrates an embodiment of the invention.
  • 1 shows a diagram of the process sequence according to an embodiment of the invention,
  • 2 shows a block diagram of a circuit arrangement according to the invention.

Der in Fig. 1 in Form eines Flußdiagramms dargestellte Ver­fahrensablauf beginnt mit Start 1. Nach dem Start 1 wird in 2 eine Entscheidung getroffen, ob das Signal auf den TTL-­Eingang gelangt. Ist das der Fall, wird das Verfahren in 3 mit der Messung der Horizontal und der Vertikalfrequenz fort­gesetzt. Ist das nicht der Fall, wird in 4 vom TTL-Eingang auf den Analogeingang umgeschaltet und in 5 geprüft, ob das Signal nun auf den Analogeingang gelangt. Ist das der Fall, geht es mit dem unter 3 genannten Verfahrensschritt weiter, ist das nicht der Fall, wird vom TTL-Eingang auf den Analog­eingang in 6 umgeschaltet und zurück zur Entscheidung in 2 gesprungen.The process sequence shown in FIG. 1 in the form of a flow chart begins with start 1. After start 1, a decision is made in 2 as to whether the signal arrives at the TTL input. If this is the case, the method is continued in FIG. 3 with the measurement of the horizontal and the vertical frequency. If this is not the case, switch from the TTL input to the analog input in 4 and check in 5 whether the signal now reaches the analog input. If this is the case, the process step under 3 continues, if this is not the case, the TTL input is switched to the analog input in FIG. 6 and the process jumps back to the decision in FIG. 2.

Nach der Messung der Frequenzen in 3 wird die Frequenz in 7 angezeigt und in 8 mit gespeicherten Betriebswerten vergli­chen. In 9 wird nun überprüft, ob ein Betriebswertepaar er­kannt wurde. Ist das der Fall, werden in 10 die entsprechen­den Speicher adressiert und der Speicherinhalt ausgelesen. Nach einer in 11 vorgenommenen Digital-Analog-Umwandlung der gespeicherten Daten erfolgt in 12 die Ansteuerung der Hori­zontal- und Vertikalstufen durch entsprechende analoge Stell­signale.After measuring the frequencies in FIG. 3, the frequency is displayed in FIG. 7 and compared with stored operating values in FIG. It is now checked in FIG. 9 whether an operating value pair has been recognized. If this is the case, the corresponding memories are addressed in FIG. 10 and the memory contents are read out. After a digital-analog conversion of the stored data carried out in FIG. 11, the horizontal and vertical stages are actuated in FIG. 12 by means of corresponding analog control signals.

Nach Abschluß dieses Verfahrensschrittes wird in einer Abfra­ge 13 geprüft, ob das Betriebssignal geändert ist. Ist das der Fall, wird zum Start zurückgesprungen und die beschriebe­nen Verfahrensschritte erneut durchlaufen. Ist das Betriebs­signal nicht geändert, wird anschließend in 14 die Tastatur abgetastet, um gewünschte Werte für Helligkeit, Kontrast, Horizontal- oder Vertikalamplitude und Horizontal- oder Ver­tikallage zu berücksichtigen. Nachfolgend wird in 15 ge­prüft, ob ein Videotestsignal gewünscht ist. Ist dies der Fall, wird in 16 eine Videotestroutine aufgerufen und nach 14 zurückgesprungen, um die entsprechenden Werte über die Tastatur zu ändern. Ist kein Videotestsignal gewünscht, wird nach 13 zurückgesprungen.After completion of this step, a check 13 is made to determine whether the operating signal has changed. If this is the case, the system jumps back to the start and the process steps described are repeated. If the operating signal is not changed, the keyboard is then scanned in 14 in order to take into account desired values for brightness, contrast, horizontal or vertical amplitude and horizontal or vertical position. Subsequently, it is checked in FIG. 15 whether a video test signal is desired. If this is the case, a video test routine is called in 16 and jumped back to 14 in order to change the corresponding values using the keyboard. If no video test signal is desired, the program jumps back after 13.

Wird in 9 ein Betriebswertepaar nicht erkannt, so wird nach 17 verzweigt, wo geprüft wird, ob eine Speicherung des neuen Paares der Horizontal- und Vertikalfrequenz erfolgen soll. Ist das der Fall, so wird in 18 eine Speicherung und eine Vorbereitung der Speicherplätze für die Ablenkstufe und die Betriebswerte vorgenommen. Ist das nicht der Fall, erfolgt ein Sprung zu 13.If an operating value pair is not recognized in FIG. 9, a branch is made to FIG. 17, where it is checked whether the new pair of horizontal and vertical frequencies should be stored. If this is the case, the storage locations for the deflection stage and the operating values are stored and prepared in FIG. If this is not the case, there is a jump to 13.

Zur Erläuterung einer erfindungsgemäßen Vorrichtung wird nun auf Fig. 2 Bezug genommen. Von Personal Computern 20, 21, von denen der eine 20 eine TTL-Adapterkarte und der andere 21 eine Analog-Adapterkarte besitzt, gelangen die für den Monitor bestimmten Signale zu Eingängen 22 und 23 der Vorrichtung 24. Die Signale werden von einem Umschalter 24 und einer Signalumwandlungsschaltung zu einem Mikrocomputer 25 geführt. Videoanteile des Signals gelangen auch direkt über eine Videostufe 26 an einen Monitor 27. Vom Mikrocomputer 25 führt eine Steuerleitung 28 zurück zum Umschalter 24, der es ermöglicht, wahlweise TTL-Signale und Analog-Signale an den Mikrocomputer 25 und den Monitor 27 anzupassen. Der Mikrocomputer 25 umfaßt eine CPU 28, ein ROM 29 und ein RAM 30. In dem RAM 30 stehen für verschiedene Betriebsarten Speicherplätze zur Verfügung. Diese Speicher­plätze können adressiert werden und der Speicherinhalt dann an Digital/Analog-Wandler 31 bis 37 weitergegeben werden. Die Digital/Analog-Wandler 31 bis 37 geben Steuersignale wei­ter an eine Videostufe 26 oder eine Horizontalablenkstufe 39 bzw. eine Vertikalablenkstufe 40. Mit dem Mikrocomputer 25 ist außerdem eine Anzeigeeinheit 41 sowie eine Eingabeeinheit 42 verbunden. Über die Eingabeeinheit 42 kön­nen die Horizontal- und Vertikalamplitude, die Horizontal-­und Vertikalposition sowie Helligkeit und Kontrast einge­stellt werden. Ferner kann ein Videotestsignal aktiviert wer­den. Besteht Interesse ein Frequenzwertepaar festzuhalten, so kann dieses über eine Speicherbefehlstaste in dem RAM 30 gespeichert werden. Ein Personal Computer mit der entspre­chenden Betriebsart kann dann an Hand des Wertepaares aus der Horizontal- und der Vertikalfrequenz automatisch mit den übrigen Betriebsarten auf den Monitor angepaßt werden.To explain a device according to the invention, reference is now made to FIG. 2. From personal computers 20, 21, of which one 20 has a TTL adapter card and the other 21 has an analog adapter card, the signals intended for the monitor reach inputs 22 and 23 of the device 24. The signals are transmitted by a switch 24 and a signal conversion circuit to a microcomputer 25. Video components of the signal also reach a monitor 27 directly via a video stage 26. A control line 28 leads from the microcomputer 25 back to the changeover switch 24, which makes it possible to adapt TTL signals and analog signals to the microcomputer 25 and the monitor 27. The microcomputer 25 includes a CPU 28, a ROM 29 and a RAM 30. In the RAM 30, memory locations are available for different operating modes. These memory locations can be addressed and the memory content can then be passed on to digital / analog converters 31 to 37. The digital / analog converters 31 to 37 pass on control signals to a video stage 26 or a horizontal deflection stage 39 or a vertical deflection stage 40. A display unit 41 and an input unit 42 are also connected to the microcomputer 25. The horizontal and vertical amplitude, the horizontal and vertical position as well as brightness and contrast can be set via the input unit 42. A video test signal can also be activated. If there is interest in holding a pair of frequency values, this can be stored in the RAM 30 using a memory command key. A personal computer with the appropriate operating mode can then be automatically adapted to the other operating modes on the monitor using the pair of values from the horizontal and vertical frequencies.

Die am Eingang des Mikrocomputers 25 anliegenden, für den Monitor bestimmten Signale, werden vom Mikrocomputer 25 hin­sichtlich der Periodendauer ihrer Horizontal- und Vertikal­synchronsignale ausgewertet. Dieses Wertepaar wird mit im RAM 30 gespeicherten Wertepaaren verglichen und bei erkann­ten gleichen Wertepaaren werden die zugehörigen Speicherplät­ze adressiert und anschließend ausgelesen. Die entsprechen­den Betriebswerte darstellenden gespeicherten Werte werden dann über die Digital/Analog-Wandler 31 bis 37 in entspre­chende Steuersignale umgewandelt und zwar bestimmen die Steu­ersignale des Digital/Analog-Wandlers 31 die Helligkeit und den Kontrast, diejenigen der Analog/Digital-Wandler 32 und 35 die Horizontal- bzw. Vertikalfrequenz, diejenigen der Di­gital/Analog-Wandler 33 und 36 die Horizontal- und Vertikal­amplitude und diejenigen der Digital/Analog-Wandler 34 und 37 die Phasenlage der Horizontal- bzw. Vertikalablenkung.The signals at the input of the microcomputer 25 intended for the monitor are evaluated by the microcomputer 25 with regard to the period of their horizontal and vertical synchronizing signals. This pair of values is compared with pairs of values stored in RAM 30, and if the same pairs of values are identified, the associated memory locations are addressed and then read out. The stored values representing the corresponding operating values are then converted via the digital / analog converters 31 to 37 into corresponding control signals, specifically the control signals of the digital / analog converter 31 determining the brightness and the contrast, those of the analog / digital converters 32 and 35 the horizontal or vertical frequency, those of the digital / analog converters 33 and 36 the horizontal and vertical amplitude and those of the digital / analog converters 34 and 37 the phase position of the horizontal or vertical deflection.

Claims (17)

1. Verfahren zur Anpassung eines Mehrbetriebsarten-Moni­tors an einen Personalcomputer, dadurch gekennzeichnet, daß Betriebswerte für die Horizontal- und Vertikalfre­quenz, die Horizontal- und Vertikalamplitude sowie für die Horizontal- und Vertikallage mehrerer häufig wieder­kehrender Betriebsarten unter betriebsartenspezifischen Adressen gespeichert werden, daß für die Ansteuerung des Monitors vorgesehene Horizontal- und Vertikalsyn­chronsignale des Personalcomputers ausgewertet werden und daß bei Erkennung der den Synchronsignalen zugeord­neten Betriebsarten die betriebsartenspezifischen Adres­sen aufgerufen und vorgegebene Steuersignale zur Ein­stellung der Betriebswerte an die Horizontal- und Verti­kalablenkstufe des Monitors übermittelt werden.1. A method for adapting a multi-mode monitor to a personal computer, characterized in that operating values for the horizontal and vertical frequency, the horizontal and vertical amplitude and for the horizontal and vertical position of several frequently recurring operating modes are stored under mode-specific addresses, that for the Control of the monitor provided horizontal and vertical synchronizing signals of the personal computer are evaluated and that when the operating modes assigned to the synchronizing signals are recognized, the operating mode-specific addresses are called up and predetermined control signals for setting the operating values are transmitted to the horizontal and vertical deflection stage of the monitor. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Periodendauer der Horizontal- und Vertikalsynchron­signale gemessen wird, daß die gemessenen Wertepaare mit einer der wählbaren Betriebsarten zugeordneten, vor­gegebenen Wertepaaren verglichen werden und daß bei Übereinstimmung mit einem dieser Wertepaare die diesen Werten zugeordneten betriebsartspezifischer Adressen aufgerufen wird.2. The method according to claim 1, characterized in that the period of the horizontal and vertical synchronizing signals is measured, that the measured pairs of values are compared with one of the selectable modes of operation, predetermined pairs of values and that if these correspond to one of these pairs of values Mode-specific addresses assigned to values is called. 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Periodendauer der Horizontalsynchronsignale durch Messung mehrerer Perioden und Division durch die Anzahl der Synchronsignale erfolgt.3. The method according to claim 2, characterized in that the period of the horizontal synchronizing signals is carried out by measuring several periods and dividing by the number of synchronizing signals. 4. Verfahren nach Anspruch 2 oder 3, dadurch gekennzeich­net, daß die Vergleichswerte bei einer erstmaligen Aus­wertung der Horizontal- und Vertikalsynchronsignale ge­speichert werden.4. The method according to claim 2 or 3, characterized in that the comparison values are stored when the horizontal and vertical synchronization signals are evaluated for the first time. 5. Verfahren nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß zusätzlich Betriebswerte für die Horizontal- und Vertikalsynchronsignale bezüg­lich ihrer Phasenwinkel ebenfalls unter den betriebsar­tenspezifischen Adressen gespeichert werden.5. The method according to one or more of claims 1 to 4, characterized in that additional operating values for the horizontal and vertical synchronizing signals with respect to their phase angle are also stored under the mode-specific addresses. 6. Verfahren nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die aus dem Speicher den Horizontal- und Vertikalablenkstufen des Monitors zuge­führten Steuersignale serielle Digital/Analog-Wandler durchlaufen.6. The method according to one or more of claims 1 to 5, characterized in that the control signals supplied from the memory to the horizontal and vertical deflection stages of the monitor pass through serial digital / analog converters. 7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß der Zyklus der Digital/Analog-Umwandlungen mit der Ver­tikalfrequenz synchronisiert ist.7. The method according to claim 6, characterized in that the cycle of the digital / analog conversions is synchronized with the vertical frequency. 8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß die in einer Periode des Vertikalsynchronsignals vorkom­mende Schrittzahl für die Analog/Digital-Umwandlung der Signale an den Analog/Digital-Wandlern konstant gehal­ten wird.8. The method according to claim 7, characterized in that the number of steps occurring in a period of the vertical synchronizing signal for the analog / digital conversion of the signals at the analog / digital converters is kept constant. 9. Verfahren nach einem oder mehreren der Ansprüche 2 bis 8, dadurch gekennzeichnet, daß als Zeitbasis für Mes­sung der Periodendauer der Horizontalsynchronsignale die Periodendauer der Vertikalsynchronsignale dient.9. The method according to one or more of claims 2 to 8, characterized in that the period of the vertical synchronizing signals is used as the time base for measuring the period of the horizontal synchronizing signals. 10. Verfahren nach einem oder mehreren der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß zur Vorgabe der Steuersi­gnale zur Einstellung der Betriebswerte ein Videotestsi­gnal erzeugt wird, welches aus horizontalen und vertikalen, die Grenzen des ausnutzbaren Bildschirmbe­reichs des Monitor darstellenden Balken gebildet ist.10. The method according to one or more of claims 1 to 9, characterized in that for specifying the control signals for setting the operating values, a video test signal is generated, which is formed from horizontal and vertical, the limits of the exploitable screen area of the monitor bar. 11. Verfahren nach Anspruch 10, dadurch gekennzeichnet, daß zur Vorgabe von Steuersignalen zur Einstellung der Bild­geometrie zusätzliche vertikale und/oder horizontale Balken innerhalb des nutzbaren Bildschirmbereichs er­zeugt werden.11. The method according to claim 10, characterized in that additional vertical and / or horizontal bars are generated within the usable screen area for specifying control signals for setting the image geometry. 12. Verfahren nach Anspruch 10 oder 11, dadurch gekennzeich­net, daß zusätzliche Horizontal- und/oder Vertikalsyn­chronsignale erzeugt werden.12. The method according to claim 10 or 11, characterized in that additional horizontal and / or vertical synchronizing signals are generated. 13. Verfahren nach einem oder mehreren der Ansprüche 10 bis 12, dadurch gekennzeichnet, daß das zur Erzeugung der Balken dienende Videotestsignal als serieller Daten­strom einem seriellen Ausgang eines Mikroprozessors ent­nommen wird.13. The method according to one or more of claims 10 to 12, characterized in that the video test signal used to generate the bars is taken as a serial data stream from a serial output of a microprocessor. 14. Verfahren nach Anspruch 13, dadurch gekennzeichnet, daß das Videotestsignal in einer Unterprogrammschleife, ins­besondere in einer seriellen Unterbrechung (Serial interrupt) der Unterprogrammschleife, periodisch nach jedem Horizontalsynchronsignal neu gestartet wird.14. The method according to claim 13, characterized in that the video test signal in a subroutine loop, in particular in a serial interrupt (serial interrupt) of the subroutine loop, is restarted periodically after each horizontal synchronizing signal. 15. Verfahren nach Anspruch 13 oder 14, dadurch gekennzeich­net, daß der Programmablauf zum Zeitpunkt des Starten des Videotestsignals unterbrochen und anschließend fort­gesetzt wird.15. The method according to claim 13 or 14, characterized in that the program flow is interrupted at the time of starting the video test signal and then continued. 16. Vorrichtung zur Anpassung eines Mehrbereichsarten-Moni­tors an einen Personal Computer, gekennzeichnet durch einen Betriebswerte für die Horizontal- und Vertikalfre­quenz, die Horizontal- und Vertikalamplitude sowie für die Horizontal- und Vertikallage mehrerer häufig wieder­kehrender Betriebsarten aufnehmenden Speicher (RAM 30), einer Auswerteschaltung (Mikrocomputer 25) zur Auswer­tung von für die Ansteuerung des Monitors vorgesehener Horizontal- und Vertikalsynchronsignale, einer Adressierschaltung (Mikrocomputer 25) zur Adressierung der die ausgewerteten Betriebsarten beinhaltenden Spei­cher sowie durch eine Steuerschaltung zur Einstellung der Betriebswerte aus gespeicherten Werten an der Hori­zontal- und Vertikalablenkstufe des Monitors.16. Device for adapting a multi-range type monitor to a personal computer, characterized by an operating value for the horizontal and vertical frequency, the horizontal and vertical amplitude and for the horizontal and vertical position of several frequently recurring operating modes, memory (RAM 30), an evaluation circuit (Microcomputer 25) for evaluating the horizontal and vertical synchronizing signals provided for the control of the monitor, an addressing circuit (microcomputer 25) for addressing the memory containing the evaluated operating modes and a control circuit for setting the operating values from stored values at the horizontal and vertical deflection stage of the Monitors. 17. Vorrichtung nach Anspruch 16, dadurch gekennzeichnet, daß als Ausgang für die Steuersignale der serielle Aus­gang eines Mikrocomputers (25) sowie parallele Ausgänge dienen und daß in den Signalwegen zur Einstellung der Betriebswerte an den Horizontal- und Vertikalablenkstu­fen des Monitors serielle, insbesondere dynamische Digi­tal/Analog-Wandler liegen.17. The apparatus according to claim 16, characterized in that the serial output of a microcomputer (25) and parallel outputs serve as an output for the control signals and that serial, in particular dynamic digital, in the signal paths for setting the operating values at the horizontal and vertical deflection stages of the monitor / Analog converter are lying.
EP88110539A 1987-07-04 1988-07-01 Matching a multi-working mode monitor with a personal computer Expired - Lifetime EP0298390B1 (en)

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DE3722169A DE3722169C2 (en) 1987-07-04 1987-07-04 Method and device for carrying out the method for adapting a multi-mode monitor to a personal computer
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EP0607778A1 (en) * 1993-01-05 1994-07-27 Nec Corporation Apparatus for driving liquid crystal display panel for small size image
US5442372A (en) * 1993-01-05 1995-08-15 Nec Corporation Apparatus for driving liquid crystal display panel for small size image
EP0609843A1 (en) * 1993-02-01 1994-08-10 Nec Corporation Apparatus for driving liquid crystal display panel for different size images
US5406308A (en) * 1993-02-01 1995-04-11 Nec Corporation Apparatus for driving liquid crystal display panel for different size images
EP0766220A1 (en) * 1994-06-14 1997-04-02 Nanao Corporation Video monitor adjusting system
EP0766220A4 (en) * 1994-06-14 1998-01-21 Nanao Corp Video monitor adjusting system
US5990940A (en) * 1994-06-14 1999-11-23 Nanao Corporation Video monitor system with video monitor adjustment messages overlaid on the video monitor

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DE3874823D1 (en) 1992-10-29
EP0298390B1 (en) 1992-09-23
ATE80959T1 (en) 1992-10-15
ES2035170T3 (en) 1993-04-16
WO1989000325A1 (en) 1989-01-12
FI891041A (en) 1989-03-03
HK79394A (en) 1994-08-19
EP0322435A1 (en) 1989-07-05
FI95084C (en) 1995-12-11
DE3722169A1 (en) 1989-01-12
FI95084B (en) 1995-08-31
FI891041A0 (en) 1989-03-03
KR890702173A (en) 1989-12-23
SG58193G (en) 1993-07-09
DE3722169C2 (en) 1997-06-05
GR3006652T3 (en) 1993-06-30
KR970005119B1 (en) 1997-04-12
JP2598503B2 (en) 1997-04-09
JPH01503816A (en) 1989-12-21
US5031118A (en) 1991-07-09

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