DE1754956U - CONTROL CIRCUIT ON A TV. - Google Patents

CONTROL CIRCUIT ON A TV.

Info

Publication number
DE1754956U
DE1754956U DET8546U DET0008546U DE1754956U DE 1754956 U DE1754956 U DE 1754956U DE T8546 U DET8546 U DE T8546U DE T0008546 U DET0008546 U DE T0008546U DE 1754956 U DE1754956 U DE 1754956U
Authority
DE
Germany
Prior art keywords
brightness
photocell
room
contrast
control circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DET8546U
Other languages
German (de)
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.)
Metz Transformatoren & App
Original Assignee
Metz Transformatoren & App
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 Metz Transformatoren & App filed Critical Metz Transformatoren & App
Priority to DET8546U priority Critical patent/DE1754956U/en
Publication of DE1754956U publication Critical patent/DE1754956U/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/44Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57Control of contrast or brightness
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H04N21/4318Generation of visual interfaces for content selection or interaction; Content or additional data rendering by altering the content in the rendering process, e.g. blanking, blurring or masking an image region
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/44Receiver circuitry for the reception of television signals according to analogue transmission standards
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/44Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57Control of contrast or brightness
    • H04N5/58Control of contrast or brightness in dependence upon ambient light

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Receiver Circuits (AREA)

Description

R*$<lß$haltun an cin<m ? ynewh$w&t lwm « NW*Uc* m Moderne Parasehgeräte sind nach einmaliger Einstellung der- artstbilt doB Ztilw BUd und Xanlfininatllung k<mm mehr eiade Die Tätigkeit den Stautzere könnte aieh otMf Dxükn der Eia und Aase$halttt&ete besohränken, wenn nicht den tagauber auftroteaden Schwankimgea deu Rau » lieh- twa bzw* <mtNp<aihend dem Ch&ytktr d « r au<enbliokliehen Sen- düngRolltgkeit und XozLtraat naobgeregelt worden mutene MitErhöhung dfy Hellikwit wird der Kontrast rtiv g<- ringen. mit Veretärkung dwa Kontraatwa nimmt di$ Helligkeit ab. Es gibt eine Reihe Ton Löengwn di< twi Änderung dwr KontrMt- einattllung ei** satsprtohende ilber-m fletig mMhMt wie zB di'HlikwitBKatomatik't <e<hri<bwn im Oradio. * » ator* 8/57# 8*522 oder die Automatik",b<Behyi$b$n im adiMntay 8/57 8*494. Beibeiden Zdeungen verbleibt bei Inderungen den Raumlichtes dieNotwendigkeit der Reglertätigang duroh den Benutzer dee ? ernaeher&te Daw Veh&ltnia Kontrakt <u yondhalligkwit wird durohdie"Automatik, eiM geg « M$itigw BinfluBaung der an Wohnelt-Zylinder und Katode do* Bildrhr anggtn Spwnnnngwa aufreeht rh&lt<n* Ala Kaohtil iBt dnbwi f tzuattllwn, daS durch diw Betätigung dww H$iigk<it<r<glwrw di< Rwgtlatilheit be Es ist auoh wkannt, mitt$l< Potozeltcn Slligkwit und Kontrakt ein « ? <rnsehg<rät$N <n beeinflussen und ggf. abhängig vom Raumlt o ioa Je 0** 5X, a. 89 « 95) DieN*u$ruag siht win Eiatllung von elligkit und XontrMt, g, stro=t naob dem individuellen Genehmaok den Benutteres fort Dieses konstant bleibende Verhältnis wird dann abhängig von der Amplitude der Synchronimpulse und der Raumhelligkeit gesteuert* Die Sßh der Synchronamplituden wieder ist abhängig von der Verstärkung des Bild-Signal-Gemisches, also vom Kontrast. Die @elligkeit ergibt sich aus der Spannungsdifferenz zwischen Wehnelt-Zylinder und Katode der Bildröhre, die über ein besonderes Röhrensystem aus der Gittervorspannung, der Steuerung durch die Spannung der Fotozelle und die aus der Diode gewonnene Spannung des Bildaussteuerungswertes entsteht. R * $ <let $ stop at cin <m? ynewh $ w & t lwm «NW * Uc * m After a one-off setting of the artstbilt doB Ztilw BUd and Xanlfininatllung k <mm more eiade The activity the Stautzere could aieh otMf Dxükn der Eia and Aase $ halttt & ete besoänken, if not the day magical Schwankimgea deu Rau »borrowed partly or * <mtNp <according to the Ch & ytktr d «r external Fertilizer roll-out and XozLtraat have been regulated With increasing dfy Hellikwit the contrast becomes rtiv g <- wrestle. with reinforcement dwa Kontraatwa decreases the brightness away. There are a number of tone Löengwn di <twi change dwr KontrMt- Filling of ice-sparkling silver-m necessary mmhMt such as di'HlikwitBKatomatik't <e <hri <bwn in the Oradio. * »Ator * 8/57 # 8 * 522 or the Automatic ", b <Behyi $ b $ n in adiMntay 8/57 8 * 494. Both connections remain with changes in the room light the need for control activity by the user dee ? closer & te Daw Veh & ltnia contract <u yondhalligkwit will during the "automatic", if there is a possibility of influencing the Wohnelt cylinder and cathode do * Bildrhr anggtn Spwnnnngwa aufreeht rh & lt <n * Ala Kaohtil iBt dnbwi f tzuattllwn, daS by diw actuation dww H $ iigk <it <r <glwrw di <Rwgtlatilheit be It is also known by means of Potocelty Slligkwit and Contract a " ? <rnsehg <advises $ N <n influence and possibly depending on the Raumlt o ioa 0 ** 5X each, a. 89 « 95) DieN * u $ ruag sees the creation of elligkit and XontrMt, g, stro = t naob the individual approval of the user This ratio, which remains constant, is then controlled as a function of the amplitude of the synchronizing pulses and the brightness of the room. The brightness results from the voltage difference between the Wehnelt cylinder and the cathode of the picture tube, which is created via a special tube system from the grid pretension, the control by the voltage of the photo cell and the voltage of the image control value obtained from the diode.

Bei unveränderter Regelsteilheit der Hilfsröhre wird für jeden Wert des Kontrastes bei konstanter Raumhelligkeit und Potentiometereinstellung eine verstärkte Helligkeit gesteuert, also eine Dynamikdehnung vorgenommen.If the control slope of the auxiliary tube remains unchanged, for each value the contrast with constant room brightness and potentiometer setting an increased Controlled brightness, so made a dynamic expansion.

Abbildung 1 und 2 zeigen zwei verschiedene Ausftthrungsbeispiele der Neuerung. Am Potentiometer x, das auf eine Stufe des ZF-Vers@ärkers wirkte wird die Verstärkung des Bild-Signal-Gemisches eingestellt. Am Widerstand r bildet sich ein mittlerer Spannungsabfall und damit zu dieser Kontrasteinstellungeine bestimmte Potentialdifferenz zwischen der Katode der Bildröhre und dem Wehnelt-Zylinder, also Helligkeit, aus. Durch Regulierung des Potentiometers g läßt sich der Arbeitspunkt der Hilfsrohre b und damit der Spannungsabfall am Widerstand e ändern.Figures 1 and 2 show two different exemplary embodiments of the Innovation. At the potentiometer x, which acts on one stage of the ZF amplifier the amplification of the image-signal mixture is set. At the resistance r is formed an average voltage drop and thus a certain value for this contrast setting Potential difference between the cathode of the picture tube and the Wehnelt cylinder, that is Brightness, off. By regulating the potentiometer g, the working point of the auxiliary pipes b and thus the voltage drop across the resistor e.

Die durch die Vorspannung am Spannungsteiler 1/m gesperrte Diode k wird durch die Zeilen-Vergleichsimpulse z geöffnet.The diode k blocked by the bias at the voltage divider 1 / m is opened by the line comparison pulses z.

Dadurch wird ein vom Bildin@halt unabhängiger Teil des Bildgemisches y gleichgerichtet und nach Passieren eines Glättungsgliedes h/i In Serie mit der Fotozellenspannung der Zelle o die Hilfsröhre b ausgesteuert.This creates a part of the mixed picture that is independent of the picture content y rectified and after passing a smoothing element h / i in series with the Photocell voltage of the cell o controlled by the auxiliary tube b.

Duroh die Verwendung der getrennten Gleichrichtung in einer besonderen Diode wird die Regelsteilheit der Hilfsröhre von einer zusätzlichen Beeinflussung freigehalten. Die gleichzeitige Einschaltung der Fotozelle yeran) ßt die Kontrast-Helligkeits-Steuerung entsprechend dem augenblicklich herrschenden Raumlioht. Abbildung 2 zeigt eine zweite Ausführungsform. Anstelle des Potentiometers g mit seinem hohen Vorschaltwiderstand t. einer Kombination, die aber die Diode k zum Spa@nungsteiler 1/m parallel geschaltet ist, tritt das niederohmige Potentiometer w am Fußpunkt der Diodenschaltung.By using the separate rectification in a special diode, the control slope of the auxiliary tube is kept free from any additional influence. The simultaneous activation of the photocell yeran) ß the contrast-brightness control according to the current room light. Figure 2 shows a second embodiment. Instead of the potentiometer g with its high Series resistor t. a combination, but the diode k is connected in parallel to the voltage divider 1 / m, the low-resistance potentiometer w occurs at the base of the diode circuit.

Claims (2)

Schutzansprüche ============-.Protection claims ============ -. 1) Regelschaltung an einem Fernsehgerät mit direkter Ankoppelung der Bildröhre (a) an die Video-Endröhre (d) mit Kompensation bzw . Überkompensation der gegenseitigen Beeinflussung von Helligkeit und Kontrast und zusätzlicher Berücksichtigung der Raumhelligkeit durch eine Fotozelle (c), dadurch gekennzeichnet, daß die vom Bildinhalt unab@ängige Amplitude der Synchronimpulse zusammen mit der du@ch die fotozelle (c) festgestellten Raumhelligkeitdio lielligkeit der Bildröhre (a) dern Kontrast und dieser Ramahelligkeit anpassen.1) Control circuit on a television set with direct coupling of the Picture tube (a) to the video output tube (d) with compensation or. Overcompensation the mutual influence of brightness and contrast and additional consideration the room brightness by a photocell (c), characterized in that the from Image content independent amplitude of the sync impulses together with the du @ ch die photocell (c) determined room brightness di lielligkeit of the picture tube (a) Adjust contrast and this rama brightness. 2) Anordnung nach 1), dadurch gekennzeichnet, daß die Fotozelle(c), die der Berücksichtigung des herrschenden Raumlichtes diente ausschaltbar ist. 3) Anordnung nach 1) dadurch gekennzeichnett daß die
Fotozelle (0) am Gerät gegen eine Fotozelle mit Verbindungskabel und verstellbarer Blende auswechselbar ist, die dann der Fernbedienung der Helligkeit dient.
2) arrangement according to 1), characterized in that the Photocell (c) that takes account of the prevailing The room light can be switched off. 3) arrangement according to 1) characterized in that the
The photocell (0) on the device can be exchanged for a photocell with a connecting cable and adjustable panel, which is then used to remotely control the brightness.
DET8546U 1957-08-22 1957-08-22 CONTROL CIRCUIT ON A TV. Expired DE1754956U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DET8546U DE1754956U (en) 1957-08-22 1957-08-22 CONTROL CIRCUIT ON A TV.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET8546U DE1754956U (en) 1957-08-22 1957-08-22 CONTROL CIRCUIT ON A TV.

Publications (1)

Publication Number Publication Date
DE1754956U true DE1754956U (en) 1957-10-31

Family

ID=32795208

Family Applications (1)

Application Number Title Priority Date Filing Date
DET8546U Expired DE1754956U (en) 1957-08-22 1957-08-22 CONTROL CIRCUIT ON A TV.

Country Status (1)

Country Link
DE (1) DE1754956U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1177675B (en) * 1958-01-25 1964-09-10 Saba Gmbh Arrangement for the automatic, room light-dependent regulation of the contrast and the image brightness of television receivers
DE1201398B (en) * 1959-11-27 1965-09-23 Nordmende Device for the combined, independent, room-light-dependent and remote-controlled setting of the contrast and / or the brightness of the image on a television receiver
DE1277308B (en) * 1958-04-18 1968-09-12 Philips Patentverwaltung Circuit arrangement in a television receiver with a device for generating an automatic gain control voltage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1177675B (en) * 1958-01-25 1964-09-10 Saba Gmbh Arrangement for the automatic, room light-dependent regulation of the contrast and the image brightness of television receivers
DE1277308B (en) * 1958-04-18 1968-09-12 Philips Patentverwaltung Circuit arrangement in a television receiver with a device for generating an automatic gain control voltage
DE1201398B (en) * 1959-11-27 1965-09-23 Nordmende Device for the combined, independent, room-light-dependent and remote-controlled setting of the contrast and / or the brightness of the image on a television receiver

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