EP0235724B1 - Colour picture tube - Google Patents

Colour picture tube Download PDF

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Publication number
EP0235724B1
EP0235724B1 EP87102569A EP87102569A EP0235724B1 EP 0235724 B1 EP0235724 B1 EP 0235724B1 EP 87102569 A EP87102569 A EP 87102569A EP 87102569 A EP87102569 A EP 87102569A EP 0235724 B1 EP0235724 B1 EP 0235724B1
Authority
EP
European Patent Office
Prior art keywords
shadow mask
picture tube
pins
trough
colour picture
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
EP87102569A
Other languages
German (de)
French (fr)
Other versions
EP0235724A1 (en
Inventor
Walter Kornaker
Horst Ruopp
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.)
Nokia Deutschland GmbH
Original Assignee
Nokia Graetz 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 Nokia Graetz GmbH filed Critical Nokia Graetz GmbH
Publication of EP0235724A1 publication Critical patent/EP0235724A1/en
Application granted granted Critical
Publication of EP0235724B1 publication Critical patent/EP0235724B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/06—Screens for shielding; Masks interposed in the electron stream
    • H01J29/07—Shadow masks for colour television tubes
    • H01J29/073—Mounting arrangements associated with shadow masks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/07—Shadow masks
    • H01J2229/0722—Frame

Definitions

  • the invention relates to a color picture tube according to the preamble of claim 1.
  • Such a color picture tube is known from DE-OS 33 37 825.
  • the pins for holding the shadow mask are arranged approximately in the middle of each side wall of the screen trough.
  • Each pin has a cylindrical base and ends in a frusto-conical tip.
  • the retaining springs are attached, in the free ends of which holes are provided, so that the ends can rest on the frustoconical tips.
  • a spacer element is provided at its free end, which sits with its opening on the tip of the pin in order to achieve a firm fit.
  • the invention has for its object to provide a color picture tube with a simple suspension of its shadow mask, which allows easy insertion and removal of the shadow mask during the manufacture of the color picture tube and which is held by external forces on the pins.
  • Fig. 1 only the screen trough 1 with the shadow mask 2 is shown from a conventional color picture tube.
  • the x-axis, the y-axis and the diagonals D1 and D2 are shown in this representation.
  • the axis of symmetry of the color picture tube is perpendicular to the plane of the drawing at the intersection of the x-axis with the y-axis.
  • the screen trough 1 carries the luminescent layer, not shown, on its inside.
  • pins 5 are arranged which support the shadow mask 2 via retaining springs 6.
  • the retaining springs 6 are attached to the edge 7 of the shadow mask 2 near its corners.
  • the enlarged top view of the lower left corner of the screen trough 1 is shown.
  • An auxiliary angle 8 is welded onto the edge 7 of the shadow mask 2 to reinforce the corner.
  • a bimetallic part 9 is fastened, with which one end of the retaining spring 6 is welded.
  • the retaining spring 6 extends approximately parallel to the edge 7 of the shadow mask 2 and its other free end extends into the corner of the shield trough 1.
  • the pin 5 is embedded in the side wall 4, the free end 10 of which is spherical .
  • the free end of the retaining spring 6 is bent such that its surface is perpendicular to the longitudinal axis of the pin 5.
  • the longitudinal axis of the pin 5 also forms the diagonal D1.
  • a hole is provided with which the retaining spring encompasses the spherical end 10 of the pin 5.
  • FIG. 3 shows a section along the line 111/111, which coincides with the diagonal D1.
  • the small width of the retaining springs 6 can be seen from this figure.
  • the retaining springs 6 can spring in two planes, tangentially and like a torsion bar.
  • the resulting movements of the retaining springs are made possible by the spherical ends 10 of the pins 5 and no forces occur which would lift the retaining springs from the pins. For this reason, it is not necessary to provide a position lock for the retaining springs. Automated insertion and removal of the shadow mask is also possible thanks to the special design of the pins and retaining springs.
  • FIGS. 4a to 4f only the shadow mask 2, the retaining springs 6 and the pins 5 are shown schematically.
  • two retaining springs 6 are attached to the opposite narrow sides of the shadow mask 2.
  • Fig. 4b it is shown that two retaining springs 6 are attached to the opposite long sides of the shadow mask 2.
  • a retaining spring 6 are arranged on the narrow sides and two retaining springs 6 on the lower long side of the shadow mask 2.
  • two retaining springs 6 are provided on the left narrow side and one retaining spring 6 each on the long sides of the shadow mask 2.
  • FIG. 4e it is shown that on the upper long side there are two retaining springs 6 and one retaining spring 6 each on the right narrow side and on the lower long side of the shadow mask 2.
  • the fastening locations shown in FIG. 4f, in which two retaining springs 6 are arranged on the right narrow side and one retaining spring 6 each on the left narrow side and on the lower long side of the shadow mask 2, are possible.

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)

Description

Die Erfindung bezieht sich auf eine Farbbildröhre gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a color picture tube according to the preamble of claim 1.

Eine derartige Farbbildröhre ist aus der DE-OS 33 37 825 bekannt. Bei dieser Farbbildröhre sind die Stifte zur Halterung der Schattenmaske etwa in der Mitte jeder Seitenwand der Schirmwanne angeordnet. Jeder Stift hat eine zylindrische Basis und endet in einer kegelstumpfförmigen Spitze. Etwa in der Mitte jeder Seite an einem die Schattenmaske tragenden Rahmen sind die Haltefedern befestigt, in deren freien Enden Löcher vorgesehen sind, so daß die Enden auf den kegelstumpfförmigen Spitzen aufsitzen können. An mindestens einer Haltefeder ist an ihrem freien Ende ein Distanzelement vorgesehen, das mit seiner Öffnung auf der Spitze des Stiftes aufsitzt, um einen festen Sitz zu erreichen.Such a color picture tube is known from DE-OS 33 37 825. In this color picture tube, the pins for holding the shadow mask are arranged approximately in the middle of each side wall of the screen trough. Each pin has a cylindrical base and ends in a frusto-conical tip. Approximately in the middle of each side on a frame carrying the shadow mask, the retaining springs are attached, in the free ends of which holes are provided, so that the ends can rest on the frustoconical tips. On at least one retaining spring, a spacer element is provided at its free end, which sits with its opening on the tip of the pin in order to achieve a firm fit.

Der Erfindung liegt die Aufgabe zugrunde, eine Farbbildröhre mit einer einfachen Aufhängung ihrer Schattenmaske anzugeben, die ein leichtes Einsetzen und Herausnehmen der Schattenmaske während der Fertigung der Farbbildröhre gestattet und die bei Krafteinwirkung von außen auf den Stiften gehalten wird.The invention has for its object to provide a color picture tube with a simple suspension of its shadow mask, which allows easy insertion and removal of the shadow mask during the manufacture of the color picture tube and which is held by external forces on the pins.

Die Lösung dieser Aufgabe erfolgt mit den im Anspruch 1 genannten Mitteln. Vorteilhafte Ausgestaltungen sind in den Ansprüchen 2 bis 4 enthalten.This object is achieved with the means mentioned in claim 1. Advantageous embodiments are contained in claims 2 to 4.

Die Erfindung wird anhand von einem in den Figuren gezeigten Ausführungsbeispiel näher erläutert. Es zeigen:

  • Fig. 1 die Draufsicht auf eine Schirmwanne mit einer eingesetzten Schattenmaske;
  • Fig. 2 die Draufsicht auf eine Ecke der Schirmwanne mit der eingesetzten Schattenmaske;
  • Fig. 3 einen Schnitt entlang der Linie 111/111 in Fig. 2 und
  • Fig. 4a bis 4f schematisch sechs weitere Möglichkeiten für die Befestigungsorte der Haltefedern.
The invention is explained in more detail using an exemplary embodiment shown in the figures. Show it:
  • Figure 1 is a plan view of an umbrella pan with a shadow mask inserted.
  • 2 shows the top view of a corner of the screen trough with the shadow mask inserted;
  • Fig. 3 shows a section along the line 111/111 in Fig. 2 and
  • 4a to 4f schematically six other options for the mounting locations of the retaining springs.

In Fig. 1 ist von einer üblichen Farbbildröhre nur die Schirmwanne 1 mit der eingesetzten Schattenmaske 2 dargestellt. Es sind in diese Darstellung die x-Achse, die y-Achse und die Diagonalen D1 und D2 eingezeichnet. Die Symmetrieachse der Farbbildröhre steht im Schnittpunkt der x-Achse mit der y-Achse senkrecht auf der Zeichenebene. Die Schirmwanne 1 trägt auf ihrer Innenseite die nicht dargestellte Leuchtschicht. Im Schnittpunkt der Diagonalen D1 und D2 mit den Seitenwänden 4 der Schirmwanne 1 sind Stifte 5 angeordnet, die über Haltefedern 6 die Schattenmaske 2 tragen. Die Haltefedern 6 sind am Rand 7 der Schattenmaske 2 in der Nähe ihrer Ecken angebracht.In Fig. 1 only the screen trough 1 with the shadow mask 2 is shown from a conventional color picture tube. The x-axis, the y-axis and the diagonals D1 and D2 are shown in this representation. The axis of symmetry of the color picture tube is perpendicular to the plane of the drawing at the intersection of the x-axis with the y-axis. The screen trough 1 carries the luminescent layer, not shown, on its inside. At the intersection of the diagonals D1 and D2 with the side walls 4 of the screen trough 1, pins 5 are arranged which support the shadow mask 2 via retaining springs 6. The retaining springs 6 are attached to the edge 7 of the shadow mask 2 near its corners.

In Fig. 2 ist die vergrößerte Draufsicht auf die linke untere Ecke der Schirmwanne 1 dargestellt. Am Rand 7 der Schattenmaske 2 ist zur Eckenversteifung ein Hilfswinkel 8 angeschweißt. An dem rechten Ende des Hilfswinkels 8 ist ein Bimetallteil 9 befestigt, mit dem das eine Ende der Haltefeder 6 verschweißt ist. Die Haltefeder 6 erstreckt sich etwa parallel zum Rand 7 der Schattenmaske 2 und ihr anderes freies Ende reicht bis in die Ecke der Schirmwanne 1. In der Ecke der Schirmwanne 1 ist in der Seitenwand 4 der Stift 5 eingelassen, dessen freies Ende 10 kugelförmig ausgebildet ist. Das freie Ende der Haltefeder 6 ist derart abgebogen, daß seine Fläche senkrecht auf der Längsachse des Stiftes 5 steht. Die Längsachse des Stiftes 5 bildet gleichzeitig die Diagonale D1. Im freien Ende der Haltefeder 6 ist ein Loch vorgesehen, mit dem die Haltefeder das kugelförmige Ende 10 des Stiftes 5 umfaßt.2, the enlarged top view of the lower left corner of the screen trough 1 is shown. An auxiliary angle 8 is welded onto the edge 7 of the shadow mask 2 to reinforce the corner. At the right end of the auxiliary bracket 8, a bimetallic part 9 is fastened, with which one end of the retaining spring 6 is welded. The retaining spring 6 extends approximately parallel to the edge 7 of the shadow mask 2 and its other free end extends into the corner of the shield trough 1. In the corner of the shield trough 1, the pin 5 is embedded in the side wall 4, the free end 10 of which is spherical . The free end of the retaining spring 6 is bent such that its surface is perpendicular to the longitudinal axis of the pin 5. The longitudinal axis of the pin 5 also forms the diagonal D1. In the free end of the retaining spring 6, a hole is provided with which the retaining spring encompasses the spherical end 10 of the pin 5.

In Fig. 3 ist ein Schnitt entlang der Linie 111/111, die mit der Diagonalen D1 zusammenfällt, gezeigt. Aus dieser Figur ist die geringe Breite der Haltefedern 6 ersichtlich. Die Haltefedern 6 können in zwei Ebenen federn und zwar tangential und wie ein Drehstab. Die dabei entstehenden Bewegungen der Haltefedern werden durch die kugelförmigen Enden 10 der Stifte 5 ermöglicht und es treten keine Kräfte auf, die die Haltefedern von den Stiften heben würden. Aus diesem Grund ist es nicht nötig, eine Lagesicherung für die Haltefedern vorzusehen. Auch ein automatisierbares Einsetzen und Herausnehmen der Schattenmaske ist durch die besondere Ausbildung der Stifte und Haltefedern möglich.3 shows a section along the line 111/111, which coincides with the diagonal D1. The small width of the retaining springs 6 can be seen from this figure. The retaining springs 6 can spring in two planes, tangentially and like a torsion bar. The resulting movements of the retaining springs are made possible by the spherical ends 10 of the pins 5 and no forces occur which would lift the retaining springs from the pins. For this reason, it is not necessary to provide a position lock for the retaining springs. Automated insertion and removal of the shadow mask is also possible thanks to the special design of the pins and retaining springs.

In Fig. 4a bis Fig. 4f sind schematisch jeweils nur die Schattenmaske 2, die Haltefedern 6 und die Stifte 5 dargestellt. In Fig. 4a sind jeweils zwei Haltefedem 6 an den sich gegenüberliegenden schmalen Seiten der Schattenmaske 2 befestigt. In Fig. 4b ist gezeigt, daß jeweils zwei Haltefedern 6 an den sich gegenüberliegenden langen Seiten der Schattenmaske 2 befestigt sind. In Fig. 4c sind je eine Haltefeder 6 an den schmalen Seiten und zwei Haltefedem 6 an der unteren langen Seite der Schattenmaske 2 angeordnet. In Fig. 4d sind zwei Haltefedern 6 an der linken schmalen Seite und je eine Haltefeder 6 an den langen Seiten der Schattenmaske 2 vorgesehen.In FIGS. 4a to 4f only the shadow mask 2, the retaining springs 6 and the pins 5 are shown schematically. In Fig. 4a two retaining springs 6 are attached to the opposite narrow sides of the shadow mask 2. In Fig. 4b it is shown that two retaining springs 6 are attached to the opposite long sides of the shadow mask 2. In Fig. 4c, a retaining spring 6 are arranged on the narrow sides and two retaining springs 6 on the lower long side of the shadow mask 2. 4d, two retaining springs 6 are provided on the left narrow side and one retaining spring 6 each on the long sides of the shadow mask 2.

In Fig. 4e ist gezeigt, daß an der oberen langen Seite zwei Haltefedern 6 und je eine Haltefeder 6 an der rechten schmalen Seite und an der unteren langen Seite der Schattenmaske 2 vorhanden sind. Auch die in Fig. 4f dargestellten Befestigungsorte, bei denen zwei Haltefedern 6 an der rechten schmalen Seite und je eine Haltefeder 6 an der linken schmalen Seite und an der unteren langen Seite der Schattenmaske 2 angeordnet sind, sind möglich.In Fig. 4e it is shown that on the upper long side there are two retaining springs 6 and one retaining spring 6 each on the right narrow side and on the lower long side of the shadow mask 2. The fastening locations shown in FIG. 4f, in which two retaining springs 6 are arranged on the right narrow side and one retaining spring 6 each on the left narrow side and on the lower long side of the shadow mask 2, are possible.

Claims (4)

1. Colour picture tube with a cone with collar and a trough-shaped screen in which there is situated a shadow mask that is supported - by means of strip- shaped holding springs attached to its edges and running more or less parallel to the said edge - on pins arranged in the side walls of the trough-shaped screen, characterized in that the pins (5), which terminate in a ball (10) at their free end, are arranged in the corners of the side walls (4) of the trough-shaped screen (1) and that the holding springs (6) are attached close to the corners of the edge (7) of the shadow mask (2) and in such a manner that their free ends reach as far as the pins (5) in the corners of the trough-shaped screen (1) and form a right angle with the longitudinal axis of the said pins.
2. Colour picture tube according to Claim 1, characterized in that the corners of the edge (7) of the shadow mask (2) are provided with auxiliary angle sections (8) and that the holding springs (6) are attached to these auxiliary angle sections (8).
3. Colour picture tube according to Claim 2, characterized in that two holding springs (6) are arranged on each of the two shorter sides of the shadow mask (2).
4. Colour picture tube according to Claim 2, characterized in that two holding springs (6) are arranged on each of the two longer sides of the shadow mask (2).
EP87102569A 1986-02-28 1987-02-24 Colour picture tube Expired EP0235724B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863606469 DE3606469A1 (en) 1986-02-28 1986-02-28 COLORED PIPES
DE3606469 1986-02-28

Publications (2)

Publication Number Publication Date
EP0235724A1 EP0235724A1 (en) 1987-09-09
EP0235724B1 true EP0235724B1 (en) 1989-08-16

Family

ID=6295120

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87102569A Expired EP0235724B1 (en) 1986-02-28 1987-02-24 Colour picture tube

Country Status (4)

Country Link
US (1) US4884005A (en)
EP (1) EP0235724B1 (en)
JP (2) JPS62206971A (en)
DE (2) DE3606469A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8903035A (en) * 1988-12-31 1990-07-16 Samsung Electronic Devices SUPPORT CONSTRUCTION FOR SHADOW MASK FROM COLOR IMAGE TUBE WITH FLAT SCREEN.
US5256937A (en) * 1989-04-07 1993-10-26 Nokia (Deutschland) Gmbh Flat panel fluorescent screen display tube
US5021707A (en) * 1989-11-17 1991-06-04 Rca Licensing Corporation Color picture tube having shadow mask with improved support
IT1245379B (en) * 1991-03-28 1994-09-20 Videocolor Spa COLOR IMAGE REPRODUCTION TUBE EQUIPPED WITH A PERFECTED SUPPORT OF THE SHADOW-FRAME MASK COMPLEX
US5327043A (en) * 1992-07-15 1994-07-05 Rca Thomson Licensing Corporation Internal magnetic shield-frame mounting means
KR20010089620A (en) * 1999-11-26 2001-10-06 요트.게.아. 롤페즈 Color display tube with improved suspension of the color selection electrode
EP1151461A1 (en) * 1999-11-26 2001-11-07 Koninklijke Philips Electronics N.V. Color display tube with improved suspension of the color selection electrode
JP2003532984A (en) * 2000-05-02 2003-11-05 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Color display tubes with improved suspension of color selection electrodes

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3912963A (en) * 1973-09-07 1975-10-14 Zenith Radio Corp Color crt having shadow mask with forwardly directed, outwardly flared skirt
US4315189A (en) * 1979-02-14 1982-02-09 Toshiba Corporation Support structure for shadow mask of color cathode ray tube
US4317064A (en) * 1979-10-15 1982-02-23 Zenith Radio Corporation Shadow mask suspension system
US4300071A (en) * 1979-12-10 1981-11-10 Zenith Radio Corporation Four-corner shadow mask suspension system for television cathode ray tubes
NL8004173A (en) * 1980-07-21 1982-02-16 Philips Nv COLOR IMAGE TUBE.
JPS57152646A (en) * 1981-03-17 1982-09-21 Nec Corp Color cathode ray tube
DE3411330A1 (en) * 1984-03-28 1985-10-10 Standard Elektrik Lorenz Ag, 7000 Stuttgart COLORED PIPES
US4572983A (en) * 1984-03-29 1986-02-25 Rca Corporation Color picture tube having an improved support structure for a color selection electrode

Also Published As

Publication number Publication date
US4884005A (en) 1989-11-28
JPH04110077U (en) 1992-09-24
DE3606469A1 (en) 1987-09-03
JPS62206971A (en) 1987-09-11
EP0235724A1 (en) 1987-09-09
DE3760461D1 (en) 1989-09-21

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