EP0214257A1 - Concept alimentation electrique-balayage pour postes de television - Google Patents

Concept alimentation electrique-balayage pour postes de television

Info

Publication number
EP0214257A1
EP0214257A1 EP86901856A EP86901856A EP0214257A1 EP 0214257 A1 EP0214257 A1 EP 0214257A1 EP 86901856 A EP86901856 A EP 86901856A EP 86901856 A EP86901856 A EP 86901856A EP 0214257 A1 EP0214257 A1 EP 0214257A1
Authority
EP
European Patent Office
Prior art keywords
network
deflection
power supply
circuit
line
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
EP86901856A
Other languages
German (de)
English (en)
Inventor
Uwe Hartmann
Udo Mai
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 EP0214257A1 publication Critical patent/EP0214257A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/18—Generation of supply voltages, in combination with electron beam deflecting
    • H04N3/185—Maintaining DC voltage constant

Definitions

  • the invention is based on a deflection power supply concept for television sets, in which the various operating voltages for the television receiver are generated from the line transformer and the losses of the horizontal deflection circuit during the line flyback and part of the first half of the forward run are compensated for by a switching power supply which uses periodic energy Closing an electronic switch in series with the primary winding of a transformer and the magnetic energy stored in the primary winding is then transferred to the primary inductance of the line transformer during the open phase of the electronic switch, the parallel to the same electronic switch via a isolating diode Primary winding of the line transformer of the television receiver is connected, to which the horizontal deflection winding is connected, the positive deflection flowing through the deflection winding str ⁇ m flows through the same electronic switch and the negative deflection current flows through a diode connected in parallel with the deflection winding and the generated operating voltages are stabilized in the event of mains voltage fluctuations in that the leading phase of the electronic switch is pulse-width modulated by a control circuit, so that at
  • the demand for a separation of the television sets has only arisen in recent years; because these devices are increasingly being used as monitors, for example for playing video recordings, for connecting to video game devices, as output devices for home computers. Disconnection from the mains is also an essential requirement for connecting headphones. Since the connections for such peripheral devices relate exclusively to the signal-processing parts of the television set, complete disconnection from the mains is not necessary, so that it is sufficient if only these parts of the device are disconnected from the mains.
  • the invention is based on the task of ensuring a grid separation using the cost-effective concept of the circuit constructed according to the preamble of the patent claim. This object is achieved by the invention specified in the patent claim.
  • the invention has the advantage that no expensive additional components are required.
  • Figure 1 shows a first arrangement for implementing the invention
  • Figure 2 shows a variant of Figure 1 with integrated circuits.
  • An operating voltage U0 rectified from the AC voltage source 1 is connected via an inductor 2 to a switch 3 which is periodically opened and closed by a driver circuit 4 at the line frequency.
  • the switch 3 is used to generate the operating voltages U1 to Un for the television receiver and to generate the deflection current through the line deflection winding 5.
  • This circuit is described in detail in DE-PS 21 30 902.
  • the magnetic energy stored in the inductor 2 at the time the switch 3 is switched off is transmitted via a winding 6 and via a diode 7 into a winding 8 of the line transformer 9. From this, the various on the secondary side of the line transformer 9. Tensioner.
  • U1 to Un are generated, such as the operating voltages for the various signal processing stages and the high voltage, Focus voltage, screen grid voltage, the stand-by voltage and the supply voltage for the sound part.
  • a winding 10 is also provided, which can be used to extract energy from a switched vertical stage.
  • the control for switch 3 is removed on the secondary side and via a mains isolating coupling element, e.g. a small pulse transformer 12 is transmitted to the primary side.
  • a mains isolating coupling element e.g. a small pulse transformer 12 is transmitted to the primary side.
  • an optocoupler can also be used. Because the control of the switch 3 is isolated from the mains, the masses on the mains-connected and the mains-separated side are no longer galvanically connected. While the horizontal deflection winding is connected to the network, the vertical deflection circuit is network separated. The network separation therefore also runs through the deflection unit.
  • the line separation is symbolically indicated by line 15.
  • the control circuit 11 is also arranged on the network side and is controlled by a line oscillator located on the network-separated side via a network-separating coupling element 12. If the actual value of the control is taken from the network-separated side and the control circuit is also arranged there, the control information for controlling the driver circuit 4 must take place via the network-separating coupling element 12 in the form of pulse-width-modulated signals.
  • the network separating coupling element 12 is shown in the figure as a transformer.
  • a protective circuit 13 is also arranged on the network side, which provides information tapped at a sensing element 14 Overloading the switching power supply receives and the driver circuit 4 is put out of operation.
  • the circuit shown in FIG. 2 represents an optimized solution that works with two integrated circuits (21, 22).
  • the following functions are arranged on the network-connected side:
  • Start-up circuit 16 for starting the circuit with pulses of increasing width, control 11 by pulse width modulation, driver circuit 4 for actuating switch 3 and the protective circuit 13.
  • This concept has the advantage of precise control because the actual value can be obtained directly from the system voltage U syst .
  • the protective circuit is simple and safe because the charging and discharging current is only queried in relation to a single ground point. This ground point is also the reference point of the regulated actual value.
  • the pulse transmitter 12 can have a small dimension since only a wide pulse signal is transmitted without control information.
  • the standby transformer 21 can also be small.
  • the receiver is switched on by applying the operating voltage to the H oscillator 17 with output stage 20.
  • the switch-on process can be done with the help a microprocessor via a remote control.
  • Control circuit 11 controls the pulse width control.
  • the dividing line of the device runs in such a way that the primary power supply, the horizontal deflection circuit with horizontal deflection winding, the horizontal driver circuit with voltage supply is on the side connected to the mains, while all signal-processing parts of the device, the high-voltage supply connected with the Line transformer connected supply voltage rails, the vertical deflection circuit with vertical deflection winding, the line oscillator are arranged with the synchronization circuit.
  • the standby transformer, the diode split line transformer and an isolating transformer or an optocoupler for the transmission of the control signals from the secondary side to the primary side serve as network isolating coupling links between the two sides.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Details Of Television Scanning (AREA)
  • Dc-Dc Converters (AREA)
  • Television Receiver Circuits (AREA)

Abstract

Le concept ci-décrit fonctionne sur le principe de Wessel. Le circuit de balayage horizontal comportant le bobinage de balayage, le circuit excitateur, les inductances de mémoire correspondent au côté relié avec le réseau, tandis que les bobinages permettent de produire les hautes tensions et les tensions de fonctionnent ainsi que l'oscillateur horizontal avec le comparateur de phase et les bobines de balayage vertical avec leurs circuits d'excitation sont séparés du réseau. Les informations permettant la régulation de l'alimentation électrique de commutation disposée sur le côté relié au réseau sont prélevées sur un circuit de régulation séparé du réseau et transmises via un circuit de couplage permettant la séparation du réseau.
EP86901856A 1985-03-08 1986-03-08 Concept alimentation electrique-balayage pour postes de television Ceased EP0214257A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3508267 1985-03-08
DE19853508267 DE3508267A1 (de) 1985-03-08 1985-03-08 Ablenk-netzteil-konzept fuer fersehgeraete

Publications (1)

Publication Number Publication Date
EP0214257A1 true EP0214257A1 (fr) 1987-03-18

Family

ID=6264599

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86901856A Ceased EP0214257A1 (fr) 1985-03-08 1986-03-08 Concept alimentation electrique-balayage pour postes de television

Country Status (5)

Country Link
US (1) US4727464A (fr)
EP (1) EP0214257A1 (fr)
JP (1) JPS62502015A (fr)
DE (1) DE3508267A1 (fr)
WO (1) WO1986005345A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3707915A1 (de) * 1987-03-12 1988-09-22 Thomson Brandt Gmbh Fernsehempfaenger mit einem netztrennenden geregelten schaltnetzteil
US4823248A (en) * 1987-04-07 1989-04-18 Murata Manufacturing Co., Ltd. High voltage generator
DE3731645A1 (de) * 1987-09-19 1989-03-30 Thomson Brandt Gmbh Schaltnetzteil
DE3733010A1 (de) * 1987-09-30 1989-04-13 Thomson Brandt Gmbh Stand-by - schaltung in verbindung mit getakteter vertikalendstufe
DE3844210A1 (de) * 1988-12-29 1990-07-05 Electronic Werke Deutschland Schaltnetzteil mit ueberlastschutz
DE4005168C2 (de) * 1990-02-17 1993-09-30 Jungheinrich Ag Stromrichter für höhere Frequenzen
JPH04957A (ja) * 1990-04-18 1992-01-06 Sharp Corp ファクシミリ装置
DE4117891A1 (de) * 1991-05-31 1992-12-03 Thomson Brandt Gmbh Schaltnetzteil
DE19912627A1 (de) * 1999-03-20 2000-09-28 Thomson Brandt Gmbh Schaltung zur Stabilisierung einer Hochspannung

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO123469B (fr) * 1970-06-23 1971-11-22 Jan Wessels Radiofabrikk Radio
DE2313961C2 (de) * 1973-03-21 1975-05-07 Philips Patentverwaltung Gmbh, 2000 Hamburg Zeilenablenk-Schaltungsanordnung für Kathodenstrahlröhren
GB1481518A (en) * 1973-10-23 1977-08-03 Rca Corp Power supply and line deflection circuit for television receivers
FR2294600A1 (fr) * 1974-12-13 1976-07-09 Blaupunkt Werke Gmbh Recepteur de television comportant des raccordements prevus pour des appareils supplementaires
DE2525122C3 (de) * 1975-06-05 1981-11-26 Standard Elektrik Lorenz Ag, 7000 Stuttgart Speiseschaltung für eine Thyristor-Horzontalablenkstufe eines Fernsehempfängers
US3947632A (en) * 1975-07-23 1976-03-30 Rca Corporation Start-up power supply for a television receiver
GB1551013A (en) * 1975-11-07 1979-08-22 Rca Corp Power supply arrangement with minimum interaction between plural loads
DE2606351A1 (de) * 1976-02-18 1977-08-25 Loewe Opta Gmbh Chassis fuer fernsehempfangsgeraete mit vom netzpotential getrennten empfaengerschaltungen
JPS6031297B2 (ja) * 1977-04-18 1985-07-22 株式会社日立製作所 高圧保護装置
US4176304A (en) * 1978-05-09 1979-11-27 Rca Corporation Regulating television horizontal deflection arrangement
US4188568A (en) * 1978-08-14 1980-02-12 Gte Sylvania Incorporated Power saving circuit
US4321514A (en) * 1980-11-07 1982-03-23 Rca Corporation Commutated SCR regulator for a horizontal deflection circuit
US4398133A (en) * 1981-01-26 1983-08-09 Zenith Radio Corporation High frequency computer terminal power supply with isolation
FR2519485A1 (fr) * 1981-12-31 1983-07-08 Thomson Brandt Dispositif d'alimentation regulee a decoupage notamment pour appareil de visualisation et appareil le comportant
DE3210908C2 (de) * 1982-03-25 1984-05-30 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig & Co KG, 8510 Fürth Synchronisiertes Schaltnetzteil mit netzgetrennter Horizontal-Endstufenschaltung in Fernsehempfängern
DE3227152C2 (de) * 1982-07-21 1984-09-06 Standard Elektrik Lorenz Ag, 7000 Stuttgart Wandlernetzteil mit Netztrennung für Fernsehgeräte
ATE30095T1 (de) * 1983-06-01 1987-10-15 Telefunken Fernseh & Rundfunk Schaltnetzteil fuer ein geraet mit bereitschaftsbetrieb, insbesondere fuer einen fernsehempfaenger.
JPS604628A (ja) * 1983-06-23 1985-01-11 Daikin Mfg Co Ltd 薄肉型ダンパ−デイスク
GB8334372D0 (en) * 1983-12-23 1984-02-01 Gen Electric Co Plc Dc-dc converter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8605345A1 *

Also Published As

Publication number Publication date
DE3508267A1 (de) 1986-09-11
US4727464A (en) 1988-02-23
JPS62502015A (ja) 1987-08-06
WO1986005345A1 (fr) 1986-09-12

Similar Documents

Publication Publication Date Title
DE69722625T2 (de) Eintakt-durchflussumrichter für gleichstrom-gleichstrom-umwandlung mit verbesserter rücksetzung für synchrongleichrichtung
EP0373670B1 (fr) Disposition de circuit pour un onduleur ou un convertisseur de courant continu
EP0396125B1 (fr) Conventisseur direct
CH698835B1 (de) Eigenstromversorgung für Stromrichterschaltertreiber.
WO1996038829A1 (fr) Systeme de transmission a isolement galvanique d'energie auxiliaire (tension continue) et d'informations a une unite electronique
EP1976108A2 (fr) Convertisseur, en particulier pour une turbine à ions
DE4108259C2 (fr)
DE69510903T2 (de) Leistungsbegrenzender Regler
WO1986005345A1 (fr) Concept alimentation electrique-balayage pour postes de television
EP0099596B1 (fr) Circuit d'alimentation en courant électrique
DE2647146A1 (de) Spannungsregler
DE3419792A1 (de) Schaltnetzteil nach dem sperrwandlerprinzip fuer den wahlweisen betrieb an netz- oder einer batteriespannung
EP0197045B1 (fr) Arrangement d'un circuit pour l'alimentation d'un recepteur de television
DE69714753T2 (de) Aktive gleichrichterschaltung
DE3501052A1 (de) Wandlerschaltung
DE3736800C2 (fr)
EP0941571B1 (fr) Unite d'alimentation a mode de commutation et a regulation de la tension de sortie
EP0223171B1 (fr) Bloc d'alimentation à découpage
DE3049020C2 (de) Regelbarer Gleichspannungswandler für Leistungsschaltnetzteile
EP2562918A1 (fr) Ensemble circuit avec un commutateur électronique
EP0228582B1 (fr) Circuit pour la génération d'une tension de fonctionnement et d'un courant de déflection horizontal
DE3722451C2 (fr)
DE3707915A1 (de) Fernsehempfaenger mit einem netztrennenden geregelten schaltnetzteil
DE3622986A1 (de) Schaltnetzteil zur erzeugung mehrerer netzgetrennter betriebsspannungen
EP0309900B1 (fr) Alimentation de puissance à découpage

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19861008

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17Q First examination report despatched

Effective date: 19881202

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19890731

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MAI, UDO

Inventor name: HARTMANN, UWE