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EP0142200B1 - Anordnung zur Elektrodenspannungsregelung für Kathodenstrahlröhren - Google Patents

Anordnung zur Elektrodenspannungsregelung für Kathodenstrahlröhren Download PDF

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Publication number
EP0142200B1
EP0142200B1 EP84201569A EP84201569A EP0142200B1 EP 0142200 B1 EP0142200 B1 EP 0142200B1 EP 84201569 A EP84201569 A EP 84201569A EP 84201569 A EP84201569 A EP 84201569A EP 0142200 B1 EP0142200 B1 EP 0142200B1
Authority
EP
European Patent Office
Prior art keywords
pipe
cable
resistive layer
layer
winding
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
EP84201569A
Other languages
English (en)
French (fr)
Other versions
EP0142200A2 (de
EP0142200A3 (en
Inventor
Francis Societe Civile S.P.I.D. Faye
Georges Societe Civile S.P.I.D. Prigent
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.)
LA RADIOTECHNIQUE PORTENSEIGNE
Koninklijke Philips NV
Original Assignee
LA RADIOTECHNIQUE PORTENSEIGNE
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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
Priority claimed from FR8317650A external-priority patent/FR2554635B1/fr
Priority claimed from FR8407954A external-priority patent/FR2565025B1/fr
Application filed by LA RADIOTECHNIQUE PORTENSEIGNE, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical LA RADIOTECHNIQUE PORTENSEIGNE
Publication of EP0142200A2 publication Critical patent/EP0142200A2/de
Publication of EP0142200A3 publication Critical patent/EP0142200A3/fr
Application granted granted Critical
Publication of EP0142200B1 publication Critical patent/EP0142200B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/30—Adjustable resistors the contact sliding along resistive element
    • H01C10/38—Adjustable resistors the contact sliding along resistive element the contact moving along a straight path
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/42—Flyback transformers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/42—Flyback transformers
    • H01F2038/423—Flyback transformers with adjusting potentiometers

Definitions

  • the invention relates to an adjustable voltage generator device for supplying at least one electrode of a cathode ray tube, device comprising a transformer provided with a winding for supplying at least one voltage to at least one potentiometer on the cursor of which is collected.
  • the invention finds its main application in color television receivers.
  • a special potentiometer capable of supporting a voltage of several kilovolts across its terminals is used to supply the adjustable voltage.
  • Such a potentiometer is present for example in the catalog of the PHILIPS Company under the name "FOCUS POTENTIOMETER UNIT”.
  • Such a potentiometer is bulky, difficult to connect, and above all expensive to manufacture because of the insulation constraints required by the high voltages present.
  • the invention provides a solution to avoid the use of such a specific element, its attachment to the transformer and its connection to the voltage generator element.
  • the generating devices include a transformer provided with a winding to provide a voltage, and a hollow part called a "pipe" into which an electric cable is introduced and in which the latter is connected to the winding.
  • the device according to the invention is remarkable in that the potentiometer is produced inside the pipe, the cable directly collecting the adjustable tension therein, because inside said pipe.
  • pipe is arranged at least one resistive layer forming a potentiometer, one end of which is connected to the winding, that the electric cable is provided with means connected to its conductive core for making contact with said layer, and that the insertion of the cable into the pipe is adjustable, thereby moving the point of contact with the resistive layer.
  • the potentiometer track is constituted by means of a resistive layer placed inside the very pipe of the output of the concentration voltage, and the potentiometer cursor by means of the end of the cable. high voltage introduced into said pipe which can slide in this pipe to adjust the tension.
  • the other end of the resistive layer is advantageously connected to another point of the winding.
  • the means for making contact with the layer consist of the end of the conductive core of the cable folded over its insulating sheath.
  • the device according to the invention it is possible to provide an adjustable high voltage by using only extremely simple and inexpensive means.
  • the device according to the invention advantageously applies to the supply of the concentration voltage as well as to the bias voltage of the second grid of the cathode-ray tube, and for this purpose, its hollow part has two housings, for two cables, housings each provided with a resistive layer.
  • a high voltage television transformer is shown.
  • the latter is usually provided with several windings, or windings, providing various voltages, placed around a ferrite core 8.
  • the winding 20 which provides the focusing voltage is shown.
  • the transformer has a protruding and hollow part 10 called a "pipe", into which an electrical cable 9 is introduced and into which the latter is connected to the winding 20.
  • a resistive layer 2 is arranged, one end of which is connected by connection 7 to a point of the winding.
  • the electric cable 9 is provided with means for making contact with said layer and its insertion into the pipe is adjustable by hand or by some mechanical means which is easy to carry out.
  • FIG. 2A where the winding 20 and the resistive layer 2 are found, shows that said other end is connected by the conductor 11 to a heel resistor 23, itself connected to ground.
  • This diagram also includes rectifier diodes not described here, which can be connected in different ways, described for example in the book “The new guide to color television” at Editions CHIRON in Paris, pages 229 to 240 These diodes are generally incorporated in the molding of the winding, for example in the manner described by patent FR 2 146 419. A diode can thus be placed in series in connection 7.
  • FIG. 2B represents another possibility of connecting the potentiometer.
  • This possibility is not used in the prior art because it requires the presence of a second pipe to ensure the connection, at point 22, of the other end of the potentiometer.
  • This connection is on the other hand advantageous in the context of the invention since it makes it possible to eliminate the conductor 11 and the resistor 23.
  • the two ends of the resistive layer, located in the same pipe 10, are connected to the sockets 21, 22 of the 'winding.
  • the pipe of FIG. 3A comprises a resistive layer 2 deposited directly inside the pipe. This deposition can be carried out under plasma, this well-known technique making it possible to metallize inaccessible surfaces.
  • a conductive layer is deposited by masking the central part of the layer 2 during the deposition. The conductive pads 5, 6 allow the connection with, respectively, the connection 7 and the clip 12.
  • the pipe of FIG. 3B is provided with an internal prefabricated part 100.
  • This part has a groove 4 in which is fixed an insulating strip covered with a resistive layer.
  • FIG. 4 represents such a bar covered with the resistive layer 2 on one side, a conductive layer 1, 3 being deposited at each end. These layers are preferably deposited by screen printing in a thick layer on a ceramic substrate which has a large quantity of bars and which is then cut into unitary bars. On the end layers 1 and 3, connections 7 and 70 are fixed, the connection 70 being for example folded behind the bar. The bar is then fixed in the part 100, the connections 7, 70 passing through the holes 24, then the connections 7, 70 are connected to the winding 20 and, finally, all of the winding and the part 100 is overmolded to form a block provided with the pipe 10.
  • the cable 9 of FIG. 5A is provided at its end with a ferrule 14 welded to the central conductor 13 of the cable.
  • This tip comprises one or more stamped cutout (s) each constituting an elastic blade 25 intended to ensure good contact with the resistive layer.
  • FIG. 5B the end of the rigid central conductor 13 of the cable is folded over its insulating sheath to ensure contact with the resistive layer. This arrangement is suitable for the pipe shown in FIG.
  • the groove 4 then being deeper than the thickness of the bar, so that after fixing it in the bottom of the groove, the resistive layer remains in shrinkage with respect to the inner wall of the pipe, thus further constituting a groove into which the end 13 of the cable enters into contact with the bar, thus preventing the cable from turning around its longitudinal axis.
  • a narrow bar housed in the groove it is also possible to use a relatively wide bar, housed in a suitable recess next to the housing intended for the cable, with a slot between said recess and said housing, slot through which the conductive end of the cable, such an arrangement is represented by FIGS. 7A, B, C which will now be described.
  • the pipe seen in perspective in FIG. 7A comprises two housings for two cables 9, 29, housings each provided with a resistive layer.
  • the winding 20 provides a voltage of approximately 8 kV via a conductor 33 at one end of a resistive track 2 on which the cable 9 supplying the electrode contacts. focusing, track followed by a track 23 forming resistance-heel, and a resistive track 28 on which makes contact with cable 29 supplying the second grid of the cathode-ray tube.
  • the end, opposite to track 23, of track 28 is connected by a conductor 36 to an outlet of the transformer winding, outlet providing approximately 0.5 kV; it could also be brought back to earth via a heel resistance.
  • Figure 7B is a cross section through the pipe of Figure 7A. It shows two cables 9, 29 in two cylindrical housings, and two bars 31, 32 with which the ends 13, 30 respectively of the cables 9, 29 are in contact.
  • the bars 31, 32 are placed together in a suitable recess 27 placed between the two housings for the cables, and passages parallel to the axes of the cables make said housings communicate with said recess 27 by allowing the ends of the cables to pass 13.30.
  • a contact tip like that shown in Figure 5A could as well be used here.
  • FIG. 7C which is a perspective view in section along C of the pipe of FIG. 7A, makes it possible to perfectly understand the arrangement of the cables 9, 29, and the bars 31, 32.
  • FIG. 8a represents bars 31 and 32 seen from the side which carries the resistive tracks 2 and 28 and conductive connecting tracks 33 to 36.
  • the bars are cut from an alumina plate and the tracks are produced according to the so-called “technique”. in thick layers "by screen printing and baking.
  • Track 28 is wider than track 2, because for the same cable sliding length, it must provide a voltage variation of approximately 400 volts, while track 2 provides a variation of approximately 2 kilovolts.
  • the Resis part heel counter 23 which extends the track 28 is offset laterally so that, in the event of insufficient penetration of the cable, it is no longer in contact with the resistor, so that the second grid cannot be brought to a tension too high.
  • a clip 26 provides the electrical connection between the conductive tracks 34 and 35 of FIG. 8A, and the tracks 33 and 36 are connected to taps of the winding as explained above with reference to FIG. 9.
  • Figure 6A shows the outer end of a pipe provided with slots 15 around a cable passage.
  • the slots 15 allow tightening by constriction.
  • a plug 17 shown in Figure 6B screwed onto the thread 16 of the pipe, so as to cause tightening.
  • a ring 18 shown in Figure 6C forced into the frustoconical end of the pipe.
  • a transverse screw 19 as shown in FIG. 6D, to tighten the cable.
  • FIGS. 6A and D represent a pipe with a cable, it is obvious that the means described with reference to these figures and more particularly in FIG. 6D apply equally well to a pipe with two cables.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Details Of Television Scanning (AREA)
  • Adjustable Resistors (AREA)

Claims (10)

1. Regelspannungsgenerator zum Speisen wenigstens einer Elektrode einer Kathodenstrahlröhre mit einem Transformator, der eine'Wicklung zum Anlegen wenigstens einer Spannung an wenigstens ein Potentiometer (2), dessen Schleifer mit einer regelbaren Spannung verbunden ist, und einen Hohlteil (10) mit der Bezeichnung "Schnabel" enthält, in den wenigstens ein elektrisches Kabel (9) eingeführt wird und dieses Kabel im Schnabel mit der Wicklung verbunden wird, dadurch gekennzeichnet, dass das Potentiometer im Schnabelinneren angeordnet ist, in dem das Kabel die regelbare Spannung direkt aufnimmt, indem im Schnabelinneren wenigstens eine Widerstandsschicht (2) zur Bildung des Potentiometers angebracht ist, von dem ein Ende mit der Wicklung (20) verbunden ist, dass das elektrische Kabel mit seinem leitenden Kern verbundene Mittel zum Kontaktieren der Widerstandsschicht enthält, und dass die Eindringtiefe des Kabels in dem Schnabel einstellbar ist und auf diese Weise die Kontaktstelle mit der Widerstandsschicht verschoben wird.
2. Generator nach Anspruch 1, dadurch gekennzeichnet, dass die Mittel zum Kontaktieren der Widerstandsschicht aus dem Ende (13) des über seine Isolierhülle zurückgebogenen, leitenden Kernes des Kabels bestehen.
3. Generator nach Anspruch 1, dadurch gekennzeichnet, dass die Mittel zum Kontaktieren der Widerstandsschicht aus einem Kabelansatz (14) mit wenigstens einer Federlamelle bestehen.
4. Generator nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Widerstandsschicht sich in einer Rille in der Wand des Schnabels befindet.
5. Generator nach einem oder mehteren der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das andere Ende der Widerstandsschicht mit einer anderen Stelle der Wicklung (20) verbunden ist.
6. Generator nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, dass wenigstens ein Isolierstreifen, auf dem eine Widerstandsschicht angebracht ist, im Schnabel angeordnet ist.
7. Generator nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Widerstandsschicht direkt auf der Innenwandlung des Schnabels angebracht ist.
8. Generator nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, dass sein Hohlteil zwei Aufnahmeräume für zwei Kabel (9, 29) enthält, wobei diese Räume mit je einer Widerstandsschicht versehen sind, die die Fokussierungsspannung bzw. die zweite Gitterspannung der Kathodenstrahlröhre verschaffen.
9. Generator nach einem oder mehreren der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass sein Hohlteil zwei Aufnahmeräume für zwei Kabel enthält, wobei die Räume je einen Isolierstreifen (31, 32) enthalten, auf dem eine Widerstandsschicht (2, 28) angebracht ist, und dass die Isolierstreifen mit ihren Rückseiten gegeneinander zwischen den Aufnahmeräumen angeordnet sind und ihre Widerstandsschichten in Serie geschaltet sind.
10. Generator nach einem oder mehreren der vorangehenden Ansprüche, dadurch gekennzeichnet, dass er Mittel zum Festsetzen des Kabels enthält.
EP84201569A 1983-11-07 1984-10-31 Anordnung zur Elektrodenspannungsregelung für Kathodenstrahlröhren Expired EP0142200B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8317650A FR2554635B1 (fr) 1983-11-07 1983-11-07 Dispositif de reglage de concentration pour tube a rayons cathodiques
FR8317650 1983-11-07
FR8407954 1984-05-22
FR8407954A FR2565025B1 (fr) 1984-05-22 1984-05-22 Dispositif de reglage de tension d'electrode pour tube a rayons cathodiques

Publications (3)

Publication Number Publication Date
EP0142200A2 EP0142200A2 (de) 1985-05-22
EP0142200A3 EP0142200A3 (en) 1985-06-19
EP0142200B1 true EP0142200B1 (de) 1988-05-11

Family

ID=26223661

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84201569A Expired EP0142200B1 (de) 1983-11-07 1984-10-31 Anordnung zur Elektrodenspannungsregelung für Kathodenstrahlröhren

Country Status (6)

Country Link
US (1) US4596949A (de)
EP (1) EP0142200B1 (de)
AU (1) AU565369B2 (de)
CA (1) CA1246244A (de)
DE (1) DE3471195D1 (de)
ES (1) ES8600566A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2591794B1 (fr) * 1985-12-13 1989-01-13 Orega Electro Mecanique Transformateur haute tension sans cables de sortie haute tension et a bloc potentiometrique amovible, en particulier pour un tube cathodique trichrome
US4714068A (en) * 1986-05-29 1987-12-22 Toyota Jidosha Kabushiki Kaisha Method and device for controlling fuel injection quantity of electronic control diesel engine
NL9001351A (nl) * 1990-06-14 1992-01-02 Philips Nv Inrichting met een van een afdichting voorzien aansluitorgaan voor een hoogspanningskabel.
US6639507B1 (en) * 2002-04-29 2003-10-28 Vladimir Tubaltsev Plated precision potentiometer

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2481682A (en) * 1948-09-13 1949-09-13 Viron E Payne Adjustable resistor
GB1449646A (en) * 1972-11-20 1976-09-15 Matsushita Electric Ind Co Ltd High voltage generator for television apparatus
US3886434A (en) * 1973-09-07 1975-05-27 Warwick Electronics Inc Flyback transformer
DE2830957C2 (de) * 1978-07-14 1982-11-04 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig & Co KG, 8510 Fürth Eingangsübertrager
JPS5532083U (de) * 1978-08-24 1980-03-01

Also Published As

Publication number Publication date
EP0142200A2 (de) 1985-05-22
AU3512084A (en) 1985-05-16
ES537380A0 (es) 1985-09-16
ES8600566A1 (es) 1985-09-16
US4596949A (en) 1986-06-24
DE3471195D1 (en) 1988-06-16
EP0142200A3 (en) 1985-06-19
CA1246244A (en) 1988-12-06
AU565369B2 (en) 1987-09-10

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