EP0298390B1 - Anpassung eines Mehrbetriebsarten-Monitors an einen Personal Computer - Google Patents

Anpassung eines Mehrbetriebsarten-Monitors an einen Personal Computer Download PDF

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Publication number
EP0298390B1
EP0298390B1 EP88110539A EP88110539A EP0298390B1 EP 0298390 B1 EP0298390 B1 EP 0298390B1 EP 88110539 A EP88110539 A EP 88110539A EP 88110539 A EP88110539 A EP 88110539A EP 0298390 B1 EP0298390 B1 EP 0298390B1
Authority
EP
European Patent Office
Prior art keywords
horizontal
vertical
monitor
accordance
values
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 - Lifetime
Application number
EP88110539A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0298390A1 (de
Inventor
Gérard Morizot
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.)
Deutsche Thomson Brandt GmbH
Original Assignee
Deutsche Thomson Brandt GmbH
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 Deutsche Thomson Brandt GmbH filed Critical Deutsche Thomson Brandt GmbH
Priority to AT88110539T priority Critical patent/ATE80959T1/de
Publication of EP0298390A1 publication Critical patent/EP0298390A1/de
Application granted granted Critical
Publication of EP0298390B1 publication Critical patent/EP0298390B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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 the operating mode is unambiguously successful, the horizontal and vertical synchronizing signals from the personal computer are evaluated To determine, 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 together with the memory, enables the storage of all required 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 those measured by the personal computer. 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.
  • FIG. 1 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, it continues with the method step mentioned under 3, if this is not the case, the TTL input is switched to the analog input in FIG. 6 and the system 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 runs through the described process steps again. 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.

Landscapes

  • 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)
  • Digital Computer Display Output (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
EP88110539A 1987-07-04 1988-07-01 Anpassung eines Mehrbetriebsarten-Monitors an einen Personal Computer Expired - Lifetime EP0298390B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88110539T ATE80959T1 (de) 1987-07-04 1988-07-01 Anpassung eines mehrbetriebsarten-monitors an einen personal computer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3722169 1987-07-04
DE3722169A DE3722169C2 (de) 1987-07-04 1987-07-04 Verfahren und Vorrichtung zur Durchführung des Verfahrens zur Anpassung eines Mehrbetriebsarten-Monitors an einen Personal Computer

Publications (2)

Publication Number Publication Date
EP0298390A1 EP0298390A1 (de) 1989-01-11
EP0298390B1 true EP0298390B1 (de) 1992-09-23

Family

ID=6330926

Family Applications (2)

Application Number Title Priority Date Filing Date
EP88110539A Expired - Lifetime EP0298390B1 (de) 1987-07-04 1988-07-01 Anpassung eines Mehrbetriebsarten-Monitors an einen Personal Computer
EP88905792A Pending EP0322435A1 (de) 1987-07-04 1988-07-01 Anpassung eines mehrbetriebsarten-monitor an einen personal computer

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP88905792A Pending EP0322435A1 (de) 1987-07-04 1988-07-01 Anpassung eines mehrbetriebsarten-monitor an einen personal computer

Country Status (12)

Country Link
US (1) US5031118A (enrdf_load_stackoverflow)
EP (2) EP0298390B1 (enrdf_load_stackoverflow)
JP (1) JP2598503B2 (enrdf_load_stackoverflow)
KR (1) KR970005119B1 (enrdf_load_stackoverflow)
AT (1) ATE80959T1 (enrdf_load_stackoverflow)
DE (2) DE3722169C2 (enrdf_load_stackoverflow)
ES (1) ES2035170T3 (enrdf_load_stackoverflow)
FI (1) FI95084C (enrdf_load_stackoverflow)
GR (1) GR3006652T3 (enrdf_load_stackoverflow)
HK (1) HK79394A (enrdf_load_stackoverflow)
SG (1) SG58193G (enrdf_load_stackoverflow)
WO (1) WO1989000325A1 (enrdf_load_stackoverflow)

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Also Published As

Publication number Publication date
EP0298390A1 (de) 1989-01-11
DE3722169C2 (de) 1997-06-05
SG58193G (en) 1993-07-09
JPH01503816A (ja) 1989-12-21
KR890702173A (ko) 1989-12-23
HK79394A (en) 1994-08-19
EP0322435A1 (de) 1989-07-05
FI891041A7 (fi) 1989-03-03
FI891041A0 (fi) 1989-03-03
JP2598503B2 (ja) 1997-04-09
DE3722169A1 (de) 1989-01-12
FI95084B (fi) 1995-08-31
KR970005119B1 (ko) 1997-04-12
GR3006652T3 (enrdf_load_stackoverflow) 1993-06-30
DE3874823D1 (de) 1992-10-29
ATE80959T1 (de) 1992-10-15
WO1989000325A1 (en) 1989-01-12
FI95084C (fi) 1995-12-11
US5031118A (en) 1991-07-09
ES2035170T3 (es) 1993-04-16

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