EP0142200A2 - Anordnung zur Elektrodenspannungsregelung für Kathodenstrahlröhren - Google Patents

Anordnung zur Elektrodenspannungsregelung für Kathodenstrahlröhren Download PDF

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Publication number
EP0142200A2
EP0142200A2 EP84201569A EP84201569A EP0142200A2 EP 0142200 A2 EP0142200 A2 EP 0142200A2 EP 84201569 A EP84201569 A EP 84201569A EP 84201569 A EP84201569 A EP 84201569A EP 0142200 A2 EP0142200 A2 EP 0142200A2
Authority
EP
European Patent Office
Prior art keywords
pipe
resistive layer
cable
voltage
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.)
Granted
Application number
EP84201569A
Other languages
English (en)
French (fr)
Other versions
EP0142200B1 (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
Radiotechnique SA
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, Radiotechnique SA, 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 to supply at least one voltage, and a hollow part called a "pipe" in which is introduced at least one electric cable and in which the latter is connected with the winding.
  • 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 supply 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 inside said pipe is arranged at least one resistive layer, one end of which is connected at a point in the winding, in that the electric cable is provided with means for making contact with said layer, and in that the insertion of the cable into the pipe is adjustable.
  • the potentiometer track is formed by means of a resistive layer disposed inside the very outlet pipe of the concentration voltage, and the potentiometer cursor by means of the end of the cable.
  • high tension introduced into the said pipe being able to slide in this pipe to regulate 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 are constituted by 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 comprises two housings, for two cables, Housing 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 comprises a prominent and hollow part 10 called a "pipe", into which an electric cable 9 is introduced and into which the latter is placed in connection with the winding 20.
  • a resistive layer 2 is arranged, one end of which is connected by the 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.
  • the other end of the resistive layer 2 is connected, for example by means of a clip 12, to a conductor 11.
  • FIG. 2A where we find the winding 20 and The resistive layer 2, shows that said other end is connected by the conductor 11 to a heel resistor 23, itself connected to ground.
  • This diagram is the one usually used. It 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” published by 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 shows 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 remove the conductor 11 and the resistance 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 Figure 3A has a resistive layer 2 cut directly to the interior of 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 Figure 3B is provided with a prefabricated internal part 100.
  • This piece has a rai nure 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, the whole 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 adapted to 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 relative to the inner wall of the pipe, thus still constituting a groove in which the penetration of the end 13 of the cable into contact with the bar, thus preventing the cable from rotating around its axis LongitudinaL.
  • 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 passes 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 supplies a voltage of approximately 8 kV by a conductor 33 at one end of a resistive track 2 on which the cable 9 contacting the electrode contacts focusing, track followed by a track 23 forming resistance-heel, and a resistive track 28 on which the contactor
  • the 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 0.5kv; it could also be brought back to ground 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 respectively 13, 30 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 13, 30 to pass.
  • 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 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 resistance-heel portion 23 which extends Track 28 is offset laterally so that, in the event of insufficient penetration of the cable, the latter is no longer in contact with the resistance, so that the second grid cannot be brought to too high a voltage.
  • the plate 32 Before being placed in the pipe 10, the plate 32 is turned back to back against the plate 31, as indicated by arrow 37, and one then obtains the set of bars represented by FIG. 8B.
  • 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.
  • FIG. 6A represents 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.
  • Figures 6A and D show a pipe to a cable, it is obvious that the means described with reference to these figures and more particularly to 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)
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 true EP0142200A2 (de) 1985-05-22
EP0142200A3 EP0142200A3 (en) 1985-06-19
EP0142200B1 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987003737A1 (fr) * 1985-12-13 1987-06-18 Orega Electronique Et Mecanique Dispositif de connexion haute tension, en particulier pour transformateur haute tension

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (3)

* 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
US3886434A (en) * 1973-09-07 1975-05-27 Warwick Electronics Inc Flyback transformer
US3936719A (en) * 1972-11-20 1976-02-03 Matsushita Electric Industrial Co., Ltd. High voltage generator for a television receiver

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Patent Citations (3)

* 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
US3936719A (en) * 1972-11-20 1976-02-03 Matsushita Electric Industrial Co., Ltd. High voltage generator for a television receiver
US3886434A (en) * 1973-09-07 1975-05-27 Warwick Electronics Inc Flyback transformer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987003737A1 (fr) * 1985-12-13 1987-06-18 Orega Electronique Et Mecanique Dispositif de connexion haute tension, en particulier pour transformateur haute tension
FR2591794A1 (fr) * 1985-12-13 1987-06-19 Orega Electro Mecanique Transformateur haute tension sans cables de sortie haute tension et a bloc potentiometrique amovible, en particulier pour un tube cathodique trichrome
EP0236642A1 (de) * 1985-12-13 1987-09-16 OREGA ELECTRONIQUE & MECANIQUE Hochspannungsanschlussvorrichtung, insbesondere für Hochspannungstransformator
US4810899A (en) * 1985-12-13 1989-03-07 Orega Electronique Et Mecanique High-voltage connection device, especially for a high-voltage transformer, without lead-out cables and with detachable potentiometer set

Also Published As

Publication number Publication date
ES537380A0 (es) 1985-09-16
AU565369B2 (en) 1987-09-10
CA1246244A (en) 1988-12-06
EP0142200B1 (de) 1988-05-11
ES8600566A1 (es) 1985-09-16
AU3512084A (en) 1985-05-16
US4596949A (en) 1986-06-24
EP0142200A3 (en) 1985-06-19
DE3471195D1 (en) 1988-06-16

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