EP0491848A1 - Grid-correction device for television sets - Google Patents

Grid-correction device for television sets

Info

Publication number
EP0491848A1
EP0491848A1 EP90914731A EP90914731A EP0491848A1 EP 0491848 A1 EP0491848 A1 EP 0491848A1 EP 90914731 A EP90914731 A EP 90914731A EP 90914731 A EP90914731 A EP 90914731A EP 0491848 A1 EP0491848 A1 EP 0491848A1
Authority
EP
European Patent Office
Prior art keywords
cursor
stripes
brightness
grid
correction
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.)
Ceased
Application number
EP90914731A
Other languages
German (de)
French (fr)
Inventor
Günter Gleim
Jacques Chauvin
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
Publication of EP0491848A1 publication Critical patent/EP0491848A1/en
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/16—Picture reproducers using cathode ray tubes
    • H04N9/28—Arrangements for convergence or focusing

Definitions

  • the invention is based on a device for raster correction in a television set according to the preamble of claim 1.
  • Such a device is basically used to correct parameters in the raster deflection, e.g. for correcting north / south, east / west distortions, cushion lists, for non-linearity in the deflection and other geometry errors in the horizontal or vertical direction.
  • a particular area of application is the convergence correction in a television projection device in which the monochromatic images are projected from three picture tubes onto an image surface.
  • a television set is understood to mean any device with electronic raster image display.
  • the device can be fed by a television broadcast signal or as a pure monitor by an RGB signal, a composite signal or separately with the luminance signal and the color carrier from any video signal source.
  • the cursor fulfills two tasks ben. The first task is to use its position to mark the part of the image for which the correction is to be made. The second task is to indicate whether a correction is necessary or not and to what extent the correction must be carried out.
  • the cursor set at a point of intersection of the strips is congruent with the horizontal and vertical strips. On the other hand, however, the cursor has to stand out from the stripes so that the operator can recognize his respective position within the grid pattern. It is therefore known to select the brightness of the cursor to be greater than the brightness of the strips themselves. B. only in R, G, B is not possible, because then an adjustment of the convergence by means of the cursor would no longer be possible.
  • the invention has for its object to provide a better definition for the cursor.
  • the invention is based on the following knowledge. So far it has been assumed that an increased brightness of the cursor is advantageous and necessary because the cursor can also only be displayed in white and, on the other hand, must differ from the white stripes of the grid pattern. It was de meanwhile found that a reduced brightness of the cursor compared to the stripes is advantageous. It is also possible to distinguish the cursor from the stripes of the grid pattern by reducing the brightness. The reduced brightness, on the other hand, results in an increased sharpness of the displayed cursor and thus a subjectively more pleasant and, in the end result, better correction of the convergence.
  • the brightness of the cursor can preferably be adjusted manually in order to enable adaptation to different boundary conditions and to the subjective feeling of the operator. So far it was assumed that the stripes and the cursor are shown in white. However, it is also possible to use a mixed color instead of white for assessing the deflection parameter and for determining the correction value.
  • Fig. 1 shows a Pro ection area with that shown
  • the projection surface 1 shows the projection surface 1, onto which a grid pattern of horizontal light stripes SH and vertical light stripes SV is imaged with three monochromatic picture tubes for the primary colors R, G, B.
  • the stripes SH are approximately the width of a line.
  • the strips SH and SV also have the same width.
  • the cross-shaped cursor C1 can be jumped to the individual crossing points K using a handle, for example a remote control, the four legs of the cursor Cl being congruent with the stripes SH and SV.
  • the sub The cursor Cl is separated from the stripes SH and SV in order to recognize the respective position of the cursor Cl in a known manner in that the brightness of the cursor Cl is greater than the brightness of the stripes SH, SV.
  • FIG. 1 additionally shows a cursor C2, the brightness of which, in contrast to the cursor C1, is not greater but less than the brightness of the stripes SH and SV, as indicated by the dashed lines. This reduced brightness results in a better edge sharpness of the individual legs of the cursor C2 and thus improves the control and correction of the convergence.
  • FIG. 2 shows an enlarged representation of a horizontal stripe SH and a vertical stripe SV in the area of an intersection point K.
  • the cursor C2 is set to the intersection point K and is congruent with the stripes SH and SV.
  • the hatching indicates that the brightness of the cursor C2 is lower than the brightness of the stripes SH, SV.
  • the brightness of the cursor C2 can be adjusted manually. As a result, an adaptation to various parameters such as the brightness of the strips SH, SV, the ambient brightness and the subjective feeling of the operator can be achieved.
  • the grid pattern described from the horizontal stripes SH and the vertical stripes SV other patterns can also be used. It is also possible to display horizontal stripes and vertical stripes one after the other on the image area 1, instead of the intersection point K only depicting crosses with a horizontal branch and a vertical branch, to produce diagonal stripes on the image area 1 or in some other way specific punk ⁇ te or areas of the image area 1 to mark the can be approached with the cursor C in order to determine the correction values for the deflection parameter.

Abstract

Pour vérifier et corriger des paramètres de déflexion, notamment la convergence, un quadrillage est formé sur le champ d'image (1). Les points d'intersection du quadrillage sont repérés à l'aide d'un curseur (C) afin de vérifier le paramètre et de déterminer les valeurs de correction. Le but est d'améliorer la netteté du curseur (C) pour la correction de trame. La luminosité du curseur (C) est inférieure à celle des lignes du quadrillage (SH, SV). Application notamment à la correction de convergence dans un téléviseur à grande surface de projection.To check and correct deflection parameters, in particular convergence, a grid is formed on the image field (1). The intersection points of the grid are marked with a cursor (C) in order to check the parameter and determine the correction values. The aim is to improve the sharpness of the cursor (C) for the field correction. The brightness of the cursor (C) is lower than that of the grid lines (SH, SV). Application in particular to the correction of convergence in a television set with a large projection surface.

Description

Einrichtung zur Rasterkorrektur in einem Fernsehgerät Device for raster correction in a television set
Die Erfindung geht aus von einer Einrichtung zur Rasterkor- rektur in einem Fernsehgerät gemäß dem Oberbegriff des An¬ spruchs 1.The invention is based on a device for raster correction in a television set according to the preamble of claim 1.
Eine derartige Einrichtung dient grundsätzlich zur Korrektur von Parametern in der Rasterablenkung, z.B. zur Korrektur von Nord/Süd-, Ost/West-Verzeichnungen, Kissenverzeichnun¬ gen, für Nichtlinearität in der Ablenkung und sonstige Geome¬ triefehler in horizontaler oder vertikaler Richtung. Ein be¬ sonderes Anwendungsgebiet ist die Konvergenzkorrektur bei einem Fernseh-Projektionsgerät, bei dem die monochromati¬ schen Bilder von drei Bildröhren auf eine Bildfläche proji- ziert werden. Unter Fernsehgerät wird dabei jedes Gerät mit elektronischer rasterweiser Bildwiedergabe verstanden. Das Gerät kann von einem Fernseh-Rundfunksignal oder auch als reiner Monitor von einem RGB-Signal, einem FBAS-Signal oder getrennt mit dem Leuchtdichtesignal und dem Farbträger von einer beliebigen Videosignalquelle gespeist sein.Such a device is basically used to correct parameters in the raster deflection, e.g. for correcting north / south, east / west distortions, cushion lists, for non-linearity in the deflection and other geometry errors in the horizontal or vertical direction. A particular area of application is the convergence correction in a television projection device in which the monochromatic images are projected from three picture tubes onto an image surface. A television set is understood to mean any device with electronic raster image display. The device can be fed by a television broadcast signal or as a pure monitor by an RGB signal, a composite signal or separately with the luminance signal and the color carrier from any video signal source.
Für die Beurteilung des jeweiligen Ablenkparameters für ei¬ nen bestimmten Punkt des Bildes und die Ermittlung des ent¬ sprechenden Korrekturwertes ist es bekannt, mit einem einge¬ blendeten Cursor jeweils bestimmte Kreuzungspunkte des Git¬ termusters zu markieren. Der Cursor erfüllt dabei zwei Aufga- ben. Die erste Aufgabe besteht darin, durch seine Lage den Teilbereich des Bildes zu markieren, für den die Korrektur vorgenommen werden soll. Die zweite Aufgabe besteht in der Anzeige, ob eine Korrektur erforderlich ist oder nicht und in welchem Umfang die Korrektur durchgeführt werden muß.For the assessment of the respective deflection parameter for a particular point of the image and the determination of the corresponding correction value, it is known to mark particular intersection points of the grating pattern with a faded-in cursor. The cursor fulfills two tasks ben. The first task is to use its position to mark the part of the image for which the correction is to be made. The second task is to indicate whether a correction is necessary or not and to what extent the correction must be carried out.
Der jeweils auf einen Kreuzungspunkt der Streifen eingestell¬ te Cursor ist deckungsgleich mit den waagerechten und senk¬ rechten Streifen. Andererseits muß sich jedoch der Cursor von den Streifen abheben, damit der Bedienende seine jeweili¬ ge Position innerhalb des Gittermusters erkennen kann. Es ist daher bekannt, die Helligkeit des Cursors größer zu wäh¬ len als die Helligkeit der Streifen selbst. Eine einfarbige Ausführung des Cursors, z. B. nur in R, G, B, ist nicht mög¬ lich, weil dann eine Einstellung der Konvergenz mittels des Cursors nicht mehr möglich wäre.The cursor set at a point of intersection of the strips is congruent with the horizontal and vertical strips. On the other hand, however, the cursor has to stand out from the stripes so that the operator can recognize his respective position within the grid pattern. It is therefore known to select the brightness of the cursor to be greater than the brightness of the strips themselves. B. only in R, G, B is not possible, because then an adjustment of the convergence by means of the cursor would no longer be possible.
Es hat sich gezeigt, daß durch die erhöhte Helligkeit des Cursors durch Defokussierung eine Unscharfe auftreten kann, daß es gewissermaßen zu einem "Ausblühen" des Cursors kommt, wodurch die genaue Einstellung der Konvergenz durch Betrach¬ tung des Cursors erschwert wird.It has been shown that the increased brightness of the cursor can result in a blurring due to defocusing, that the cursor "blooms" to a certain extent, which makes it difficult to set the convergence precisely by observing the cursor.
Der Erfindung liegt die Aufgabe zugrunde, für den Cursor ei¬ ne bessere Darstellungsschärfe zu schaffen.The invention has for its object to provide a better definition for the cursor.
Diese Aufgabe wird durch die im Anspruch 1 angegebene Erfin¬ dung gelöst. Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.This object is achieved by the invention specified in claim 1. Advantageous developments of the invention are specified in the subclaims.
Die Erfindung beruht auf folgender Erkenntnis. Bisher wurde angenommen, daß eine erhöhte Helligkeit des Cursors vorteil¬ haft und notwendig ist, weil der Cursor ebenfalls nur in weiß dargestellt werden kann und sich andererseits von den weißen Streifen des Gittermusters unterscheiden muß. Es wur- de indessen herausgefunden, daß eine gegenüber den Streifen verringerte Helligkeit des Cursos vorteilhaft ist. Die Unter¬ scheidung des Cursors von den Streifen des Gittermusters ist durch eine verringerte Helligkeit ebenfalls möglich. Die ver¬ ringerte Helligkeit andererseits bewirkt eine erhöhte Schär¬ fe des abgebildeten Cursors und damit eine subjektiv angeneh¬ mere und im Endergebnis bessere Korrektur der Konvergenz. Vorzugsweise ist die Helligkeit des Cursors manuell einstell¬ bar, um eine Anpassung an unterschiedliche Randbedingungen und an das subjektive Empfinden des Bedienenden zu ermögli¬ chen. Bisher wurde angenommen, daß die Streifen und der Cursor in weiß dargestellt werden. Es ist jedoch auch mög¬ lich, statt weiß eine Mischfarbe für die Beurteilung des Ab¬ lenkparameters und die Ermittlung des Korrekturwertes zu ver¬ wenden.The invention is based on the following knowledge. So far it has been assumed that an increased brightness of the cursor is advantageous and necessary because the cursor can also only be displayed in white and, on the other hand, must differ from the white stripes of the grid pattern. It was de meanwhile found that a reduced brightness of the cursor compared to the stripes is advantageous. It is also possible to distinguish the cursor from the stripes of the grid pattern by reducing the brightness. The reduced brightness, on the other hand, results in an increased sharpness of the displayed cursor and thus a subjectively more pleasant and, in the end result, better correction of the convergence. The brightness of the cursor can preferably be adjusted manually in order to enable adaptation to different boundary conditions and to the subjective feeling of the operator. So far it was assumed that the stripes and the cursor are shown in white. However, it is also possible to use a mixed color instead of white for assessing the deflection parameter and for determining the correction value.
Die Erfindung wird anhand der Zeichnung am Beispiel der Kon¬ vergenzeinstellung für ein Projektions-Fernsehgerät erläu¬ tert. Darin zeigen Fig. 1 eine Pro ektionsfläche mit dem abgebildetenThe invention is explained with reference to the drawing using the example of the convergence setting for a projection television set. In it, Fig. 1 shows a Pro ection area with that shown
Gittermuster und Fig. 2 in vergrößerter Darstellung den Cursor an einemGrid pattern and Fig. 2 in an enlarged view the cursor on a
Kreuzungspunkt des Gittermusters.Crossing point of the grid pattern.
Fig. 1 zeigt die Projektionsfläche 1, auf die mit drei mono¬ chromatischen Bildröhren für die Grundfarben R, G, B ein Git¬ termuster aus waagerechten hellen Streifen SH und senkrech¬ ten hellen Streifen SV abgebildet wird. Die Streifen SH ha¬ ben etwa die Breite einer Zeile. Die Streifen SH und SV ha¬ ben überdies gleiche Breite.1 shows the projection surface 1, onto which a grid pattern of horizontal light stripes SH and vertical light stripes SV is imaged with three monochromatic picture tubes for the primary colors R, G, B. The stripes SH are approximately the width of a line. The strips SH and SV also have the same width.
Der kreuzförmige Cursor Cl ist durch eine Handhabe, z.B. ei¬ ne Fernbedienung, sprungartig auf die einzelnen Kreuzungs¬ punkte K einstellbar, wobei die vier Schenkel des Cursors Cl deckungsgleich mit den Streifen SH und SV liegen. Die Unter- Scheidung des Cursors Cl von den Streifen SH und SV zur Er¬ kennung der jeweiligen Position des Cursors Cl erfolgt in bekannter Weise dadurch, daß die Helligkeit des Cursors Cl größer ist als die Helligkeit der Streifen SH, SV.The cross-shaped cursor C1 can be jumped to the individual crossing points K using a handle, for example a remote control, the four legs of the cursor Cl being congruent with the stripes SH and SV. The sub The cursor Cl is separated from the stripes SH and SV in order to recognize the respective position of the cursor Cl in a known manner in that the brightness of the cursor Cl is greater than the brightness of the stripes SH, SV.
Fig. 1 zeigt zusätzlich einen Cursor C2, dessen Helligkeit im Gegensatz zum Cursor Cl nicht größer, sondern geringer ist als die Helligkeit der Streifen SH und SV, wie durch die gestrichelten Linien angedeutet ist. Durch diese verringerte Helligkeit wird eine bessere Randschärfe der einzelnen Schen¬ kel des Cursors C2 erreicht und somit die Kontrolle und Kor¬ rektur der Konvergenz verbessert.1 additionally shows a cursor C2, the brightness of which, in contrast to the cursor C1, is not greater but less than the brightness of the stripes SH and SV, as indicated by the dashed lines. This reduced brightness results in a better edge sharpness of the individual legs of the cursor C2 and thus improves the control and correction of the convergence.
Fig. 2 zeigt in vergrößerter Darstellung einen waagerechten Streifen SH und einen senkrechten Streifen SV im Bereich ei¬ nes Kreuzungspunktes K. Der Cursor C2 ist auf den Kreuzungs¬ punkt K eingestellt und deckungsgleich mit den Streifen SH und SV. Durch die Schraffur ist angedeutet, daß die Hellig¬ keit des Cursors C2 geringer ist als die Helligkeit der Streifen SH, SV.2 shows an enlarged representation of a horizontal stripe SH and a vertical stripe SV in the area of an intersection point K. The cursor C2 is set to the intersection point K and is congruent with the stripes SH and SV. The hatching indicates that the brightness of the cursor C2 is lower than the brightness of the stripes SH, SV.
Die Helligkeit des Cursors C2 ist manuell einstellbar. Da¬ durch kann eine Anpassung an verschiedene Parameter wie z.B. die Helligkeit der Streifen SH, SV, an die Umgebungshellig¬ keit und das subjektive Empfinden des Bedienenden erreicht werden. Statt des beschriebenen Gittermusters aus den waage¬ rechten Streifen SH und den senkrechten Streifen SV können auch andere Muster verwendet werden. Es ist ebenso möglich, zeitlich nacheinander waagerechte Streifen und senkrechte Streifen auf der Bildfläche 1 abzubilden, anstelle der Kreu¬ zungspunkt K nur Kreuze mit einem waagerechten Ast und einem senkrechten Ast abzubilden, auf der Bildfläche 1 diagonale Streifen zu erzeugen oder auf sonstige Weise bestimmte Punk¬ te oder Flächenbereiche der Bildfläche 1 zu markieren, die mit dem Cursor C zwecks Ermittlung der Korrekturwerte für den Ablenkparameter angefahren werden können. The brightness of the cursor C2 can be adjusted manually. As a result, an adaptation to various parameters such as the brightness of the strips SH, SV, the ambient brightness and the subjective feeling of the operator can be achieved. Instead of the grid pattern described from the horizontal stripes SH and the vertical stripes SV, other patterns can also be used. It is also possible to display horizontal stripes and vertical stripes one after the other on the image area 1, instead of the intersection point K only depicting crosses with a horizontal branch and a vertical branch, to produce diagonal stripes on the image area 1 or in some other way specific punk ¬ te or areas of the image area 1 to mark the can be approached with the cursor C in order to determine the correction values for the deflection parameter.

Claims

P a t e n t a n s p r u c h Patent claim
1. Einrichtung zur Rasterkorrektur in einem Fernsehgerät, bei der auf der Bildfläche (1) ein Gittermuster aus waa¬ gerechten und senkrechten Streifen ( SH, SV) und ein auf die Kreuzungspunkte (K) der Streifen einstellbarer Cursor (C) abgebildet werden, dadurch gekennzeichnet, daß die Helligkeit des Cursors (C2) geringer ist als die Helligkeit der Streifen (SH, SV).1. Device for raster correction in a television set, in which a grid pattern of horizontal and vertical stripes (SH, SV) and a cursor (C) which can be set on the crossing points (K) of the stripes are depicted on the image area (1), thereby characterized in that the brightness of the cursor (C2) is less than the brightness of the stripes (SH, SV).
2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß auf der Bildfläche (1) zeitlich nacheinander zu¬ nächst waagerechte Streifen (SH) und dann senkrechte Streifen (SV) abgebildet werden.2. Device according to claim 1, characterized in that on the image surface (1) temporally one after the other horizontal stripes (SH) and then vertical stripes (SV) are imaged.
3. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Helligkeit des Cursors (C2) manuell einstellbar ist. 3. Device according to claim 1, characterized in that the brightness of the cursor (C2) is manually adjustable.
EP90914731A 1989-09-19 1990-09-11 Grid-correction device for television sets Ceased EP0491848A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3931154A DE3931154A1 (en) 1989-09-19 1989-09-19 DEVICE FOR GRID CORRECTION IN A TELEVISION
DE3931154 1989-09-19

Publications (1)

Publication Number Publication Date
EP0491848A1 true EP0491848A1 (en) 1992-07-01

Family

ID=6389680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90914731A Ceased EP0491848A1 (en) 1989-09-19 1990-09-11 Grid-correction device for television sets

Country Status (6)

Country Link
US (1) US5214499A (en)
EP (1) EP0491848A1 (en)
JP (1) JPH05500591A (en)
AU (1) AU6514790A (en)
DE (1) DE3931154A1 (en)
WO (1) WO1991004638A1 (en)

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Publication number Priority date Publication date Assignee Title
DE4016886A1 (en) * 1990-05-25 1991-11-28 Thomson Brandt Gmbh DEVICE FOR GRID CORRECTION IN A TELEVISION
US5565897A (en) * 1994-01-14 1996-10-15 Elonex Technologies, Inc. Interactive system for calibration of display monitors
KR960003448A (en) * 1994-06-09 1996-01-26 김광호 Test pattern display method for TV screen adjustment and device therefor
JP2916753B2 (en) * 1996-04-30 1999-07-05 株式会社ナナオ Video monitor adjustment system
US6285397B1 (en) 1997-01-16 2001-09-04 Display Laboratories, Inc. Alignment of cathode ray tube video displays using a host computer processor
US5969486A (en) * 1997-01-16 1999-10-19 Display Laboratories, Inc. Detecting horizontal blanking time in cathode ray tube devices
US6437829B1 (en) 1997-01-16 2002-08-20 Display Laboratories, Inc. Alignment of cathode ray tube displays using a video graphics controller
DE19735681A1 (en) * 1997-08-19 1999-02-25 Thomson Brandt Gmbh Convergence correction unit for color television apparatus
US6583814B1 (en) 1997-08-19 2003-06-24 Thomson Licensing Sa System for correction of convergence in a television device related application
DE19839676A1 (en) * 1998-09-01 2000-03-02 Heidelberger Druckmasch Ag Setup and method for calibrating a monitor

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US3609749A (en) * 1969-06-16 1971-09-28 Teletype Corp Character display system having negative image cursor
US4467322A (en) * 1982-08-30 1984-08-21 Sperry Corporation Digital shade control for color CRT background and cursors
FR2579051B1 (en) * 1985-03-15 1988-06-24 Loire Electronique CONVERGENCE ADJUSTING DEVICE FOR VIDEO PROJECTOR
US4987527A (en) * 1987-10-26 1991-01-22 Hitachi, Ltd. Perspective display device for displaying and manipulating 2-D or 3-D cursor, 3-D object and associated mark position

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Title
See references of WO9104638A1 *

Also Published As

Publication number Publication date
AU6514790A (en) 1991-04-18
US5214499A (en) 1993-05-25
DE3931154A1 (en) 1991-03-28
JPH05500591A (en) 1993-02-04
WO1991004638A1 (en) 1991-04-04

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