EP0518249B1 - Ensemble d'un masque et d'un cadre pour tube à rayons cathodique couleur - Google Patents

Ensemble d'un masque et d'un cadre pour tube à rayons cathodique couleur Download PDF

Info

Publication number
EP0518249B1
EP0518249B1 EP92109633A EP92109633A EP0518249B1 EP 0518249 B1 EP0518249 B1 EP 0518249B1 EP 92109633 A EP92109633 A EP 92109633A EP 92109633 A EP92109633 A EP 92109633A EP 0518249 B1 EP0518249 B1 EP 0518249B1
Authority
EP
European Patent Office
Prior art keywords
mask
frame
shroud
welding
points
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 - Lifetime
Application number
EP92109633A
Other languages
German (de)
English (en)
Other versions
EP0518249A3 (fr
EP0518249A2 (fr
Inventor
Rolf Dipl.-Ing. Reidinger
Rolf Dipl.-Ing. Schmidt
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.)
Panasonic Holdings Corp
Original Assignee
Nokia Deutschland 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 Deutschland GmbH filed Critical Nokia Deutschland GmbH
Publication of EP0518249A2 publication Critical patent/EP0518249A2/fr
Publication of EP0518249A3 publication Critical patent/EP0518249A3/fr
Application granted granted Critical
Publication of EP0518249B1 publication Critical patent/EP0518249B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01J2229/0727—Aperture plate
    • H01J2229/0766—Details of skirt or border

Definitions

  • the invention relates to a mask-frame combination for a color picture tube, i. H. an arrangement with an approximately rectangular mask frame and a mask which is connected to the frame via welding points.
  • Masks for color picture tubes are drawn from special sheets that are provided with elongated holes. When pulling a mask shirt is formed and the mask surface is bulged.
  • the mask shirt is connected to the frame in color picture tubes from about 51 cm (20 ⁇ ) screen diagonal at twelve single welding points or eight double welding points by means of electrical spot welding.
  • connection between the mask and the frame on the one hand, high rigidity is desired so that the mask does not deform in the event of impacts and so that it is affected by sound waves, such as those emitted by a loudspeaker within, for. B. a television can be transmitted, little to vibrations is excited.
  • a loose coupling is desired, in particular because of the different expansion behavior of the mask and frame during thermal production processes of a color picture tube and when operating such a picture, especially with high beam currents.
  • US-A-3 808 493 discloses an Invar® mask and an iron frame. The mask is attached to the frame with welded-on elastic members, which compensates for differences in thermal expansion.
  • This combination differs from that known from DE 31 15 799 in two respects.
  • the two external welding points are closer to the center welding point than to the corner welding points, which is the case with the known combination mentioned, since the distance D / 4.5 to D / 2.4 applies.
  • there are cutouts in the mask shirt. Recesses in the form of decoupling slots are known per se, e.g. B. from DE 39 19 674. Such decoupling slots enable the mask shirt areas to move relatively freely around the welding spots. This property is also brought about by the cutouts in the combination according to the invention, but this leads to a further effect which is decisive for the function of the combination according to the invention.
  • the recesses are not merely decoupling slots adjacent to a welding point, but they extend between two welding points and additionally also adjacent to the external welding points. This leads to a weakening of the mask shirt over the entire recess length. This weakening, together with the aforementioned choice of the location of the welding spots, means that the mask can deform in the area of the mask shirt during the combination cooling processes during the production process in a highly elastic manner without permanent deformations occurring.
  • Invar® is preferably used as the mask material.
  • This material has an expansion coefficient of less than 10 ⁇ 6 / ° C up to about 60 ° C, while that of iron is slightly more than a factor of 10 higher. Above a temperature between about 200 and 240 ° C, which largely depends on the Invar alloy used, the expansion of Invar is essentially the same as that of iron, so that there is no longer any longitudinal expansion at uniform temperatures from this temperature.
  • the mask-frame combination 10 shown in FIGS. 1 and 2 for a color picture tube has a frame 11 and a curved mask 12 with a bent mask shirt 13. Elongated holes 14 are present in the mask 12, through which electron beams can penetrate so that they can excite luminescent materials, which are applied in strips on a front trough (not shown), for emitting light.
  • the mask shirt 13 is connected to the frame 11 via twelve welding points 15.1 to 15.12, four of which (15.2, 15.4, 15.8 and 15.10) sit in the corners of the combination, four (15.3, 15.6, 15.9 and 15.12) in the middle of the sides sit, hereinafter referred to as center welding spots, and two (15.11 and 15.1 or 15.5 and 15.7) each sit on the long sides to the two sides of a respective center welding spot 15.12 and 15.6.
  • These welding spots are called external welding spots in the following.
  • holders (not shown) are provided on the frame 11, which are used to connect the combination 10 to the front tub of the tube.
  • the connection is made via pins in the front tub, which are attached approximately in the middle of each side of the tub.
  • the center welding points 15.3, 15.6, 15.9 and 15.12 essentially serve to press the mask shirt 13 close to the frame 11 in those areas in which the pins protrude from the bent edges of the front tub. Since the pens mentioned are usually not exactly in the middle of each page, but are offset from the center by a few millimeters to a few 10 millimeters, the center welding points mentioned are not exactly in the middle of each frame side, but are somewhat offset according to the position of the pins in relation to the respective center.
  • the diameter of the mask 12 is somewhat larger than that of the frame 11, so that there is a play S between the mask and the frame in the region of the bending of the mask.
  • This game is dimensioned such that the mask shirt 13 comes into contact with the frame 11 in the most unfavorable linear expansion conditions during manufacture, not just in the welding points.
  • a mask-frame combination 10 is heated in the course of the manufacture of a color picture tube in a stabilizing oven or a deep-frying oven, the frame 11 made of iron initially expands relatively strongly, starting from room temperature, while the mask 12 made of Invar® scarcely expands undergoes a change in length. From about 200 ° C, the coefficient of expansion of Invar® becomes noticeable, and from about 300 ° C the mask and frame expand approximately the same amount with every further temperature increase; the Invar then passed its Curie point. The temperature range between room temperature and about 250 ° C. is therefore problematic with regard to different changes in length. The conditions at the exit of a furnace become particularly critical when the mask, which has only low heat capacity, cools down very quickly, whereas the much more massive frame only slowly lowers its temperature.
  • the differences in length changes between room temperature and about 250 ° C or vice versa have the consequence that the danger there is permanent deformation of the mask.
  • the mask In order to counteract the danger, the mask has to be weakened in terms of its stiffness so that it can elastically compensate for differences in length during thermal production processes, but on the other hand it has to be so stable that it can withstand mechanical stresses.
  • the combination according to FIGS. 1 and 2 satisfies these different requirements due to the special position of the external welding spots 15.11 and 15.1 or 15.5 and 15.7 adjacent to the center welding spots 15.12 and 15.6 on the long sides, as well as due to recesses 17 in the mask shirt 13 between the welding spots and then to the respective outer welding points mentioned.
  • the distance A of a respective outer welding point from the respectively associated center welding point was D / 11 in one exemplary embodiment, where D is the length of the frame diagonal. Satisfactory manufacturing results were achieved at intervals between D / 14 and D / 9.
  • Each of the outer welding points is as close as possible to the lower edge of the mask shirt 13.
  • the distance P of the welding points from the lower edge was 2 mm in the exemplary embodiment.
  • the cutouts mentioned are present between the welds, as a result of which tabs 19 are formed in the area of the welds.
  • These flaps have a width B such that the connection between mask 12 and frame 11 is mechanically stable. In the exemplary embodiment, the width was 9 mm.
  • the length L of the recesses between two welding points is predetermined by the distance between the welding points and the width B of the tabs 19.
  • the recesses are formed with a similar length, which adjoin the outside welding points 15.11, 15.1, 15.5 and 15.7.
  • the length L is preferably between about 40 and 60 mm.
  • the depth of each recess 17 is selected so that the mask shirt is reduced from a height H of typically approximately 12 mm to a shortened height K of 6 mm. It it has been found that the shortened height K should not be longer than about 7 mm, if it is to be ensured that the mask is sufficiently flexible to be able to yield elastically to the maximum length change differences occurring in manufacturing processes.
  • a circumferential bead 18 is present in its top along its edge, which corresponds to a measure that has been known for a long time.

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)
  • Color Television Image Signal Generators (AREA)
  • Details Of Garments (AREA)

Claims (4)

  1. Combinaison masque-cadre pour un tube image en couleurs comprenant :
    - un cadre de masque (11) sensiblement rectangulaire en fer,
    - un masque (12) avec une chemise (13) recourbée, constitué d'une tôle perforée en un matériau présentant un faible coefficient de dilatation,
    - et des points de soudure (15. 1 à 15.12) qui relient la chemise de masque et partant, le masque, au cadre,
    caractérisée par le fait que
    - la chemise de masque (13) prend appui contre le côté extérieur du cadre (11),
    - les points de soudure (15.1 à 15.12) sont placés sur chacun des longs côtés de sorte qu'un point de soudure central (15. 12 ou 15.6) se trouve chaque fois pour l'essentiel à proximité du milieu d'un long côté et qu'un point de soudure extérieur (15.11 et 15.1 ou 15.5 et 15.7) se trouve chaque fois des deux côtés du point de soudure central considéré en en étant écarté de D/14 à D/9, D étant le diamètre du cadre dans la diagonale,
    - et que la chemise de masque comporte des échancrures (17) entre les points de soudure présentant les écartements mentionnés et au voisinage des points de soudure extérieurs.
  2. Combinaison masque-cadre selon la revendication 1, caractérisée par le fait que la chemise de masque (13) présente, dans la région des échancrures, une hauteur réduite (K) d'environ 7 mm au maximum.
  3. Combinaison masque-cadre selon l'une des revendications 1 ou 2, caractérisée par le fait que chaque point de soudure (15.1 à 15.12) est placé aussi près que possible sur le bord libre de la chemise de masque (13).
  4. Combinaison masque-cadre selon l'une des revendications 1 à 3, caractérisé par le fait que le masque (12) est réalisé en Invar® et que les diamètres du masque (12) sont plus grands que ceux du cadre (11), et ce d'autant pour que la chemise de masque (13) touche contre le cadre (11) lorsque le masque (12) présente une température entre environ 200 et 240°C et que la température du cadre (11) est identique ou supérieure de quelques 10°C, à celle-ci.
EP92109633A 1991-06-13 1992-06-09 Ensemble d'un masque et d'un cadre pour tube à rayons cathodique couleur Expired - Lifetime EP0518249B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4119481 1991-06-13
DE4119481A DE4119481A1 (de) 1991-06-13 1991-06-13 Masken-rahmen-kombination fuer eine farbbildroehre

Publications (3)

Publication Number Publication Date
EP0518249A2 EP0518249A2 (fr) 1992-12-16
EP0518249A3 EP0518249A3 (fr) 1992-12-30
EP0518249B1 true EP0518249B1 (fr) 1995-09-13

Family

ID=6433845

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92109633A Expired - Lifetime EP0518249B1 (fr) 1991-06-13 1992-06-09 Ensemble d'un masque et d'un cadre pour tube à rayons cathodique couleur

Country Status (6)

Country Link
US (1) US5359259A (fr)
EP (1) EP0518249B1 (fr)
JP (1) JP3261738B2 (fr)
AT (1) ATE127956T1 (fr)
DE (2) DE4119481A1 (fr)
ES (1) ES2079737T3 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6703565B1 (en) * 1996-09-06 2004-03-09 Matsushita Electric Industrial Co., Ltd. Printed wiring board
EP0858094B1 (fr) * 1997-01-30 2002-04-17 Matsushita Display Devices (Germany) GmbH Tube image couleur avec un ensemble masque-cadre
TW367519B (en) * 1997-05-27 1999-08-21 Matsushita Electric Ind Co Ltd Shielding plate body, shielding plate and color picture tube
JP3482872B2 (ja) 1998-05-15 2004-01-06 松下電器産業株式会社 カラー陰極線管
SG86345A1 (en) 1998-05-14 2002-02-19 Matsushita Electric Ind Co Ltd Circuit board and method of manufacturing the same
US6565954B2 (en) 1998-05-14 2003-05-20 Matsushita Electric Industrial Co., Ltd. Circuit board and method of manufacturing the same
KR100335090B1 (ko) * 2000-05-30 2002-05-04 구자홍 칼라 브라운관의 섀도우마스크
KR100335091B1 (ko) * 2000-05-30 2002-05-04 구자홍 칼라 브라운관의 섀도우마스크
KR100418549B1 (ko) * 2000-07-31 2004-02-11 가부시끼가이샤 도시바 컬러음극선관
US6518514B2 (en) 2000-08-21 2003-02-11 Matsushita Electric Industrial Co., Ltd. Circuit board and production of the same

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3516147A (en) * 1967-07-17 1970-06-23 A P Seedorff & Co Inc Method of fabrication of metallic frames
JPS4853668A (fr) * 1971-11-08 1973-07-27
DE2549789A1 (de) * 1975-11-06 1977-05-18 Licentia Gmbh Lochmasken-farbbildkathodenstrahlroehre
DE3115797A1 (de) * 1981-04-18 1982-12-30 Sartorius GmbH, 3400 Göttingen Schaltungsanordnung zur ansteuerung einer fluoreszenzanzeige
DE3115799C2 (de) * 1981-04-18 1985-05-30 Standard Elektrik Lorenz Ag, 7000 Stuttgart Farbauswahlelektrode für Farbfernsehröhren und Verfahren zu ihrer Herstellung
US4467242A (en) * 1982-10-18 1984-08-21 Rca Corporation Color selection electrode mounting structure having an off-set washer
FR2555807B1 (fr) * 1983-11-25 1986-04-11 Videocolor Masque d'ombre pour tube d'image en couleurs et tube d'image le comportant
DE3411330A1 (de) * 1984-03-28 1985-10-10 Standard Elektrik Lorenz Ag, 7000 Stuttgart Farbbildroehre
US4824412A (en) * 1986-02-21 1989-04-25 Zenith Electronics Corporation Method for mounting a tension mask color cathode ray tube
JPH0736317B2 (ja) * 1986-03-31 1995-04-19 株式会社東芝 カラ−受像管の製造方法
US5218265A (en) * 1989-06-16 1993-06-08 Nokia (Deutschland) Gmbh Combined mask-frame with double spot welds

Also Published As

Publication number Publication date
DE4119481A1 (de) 1992-12-17
JPH05242822A (ja) 1993-09-21
JP3261738B2 (ja) 2002-03-04
US5359259A (en) 1994-10-25
ATE127956T1 (de) 1995-09-15
EP0518249A3 (fr) 1992-12-30
ES2079737T3 (es) 1996-01-16
DE59203638D1 (de) 1995-10-19
EP0518249A2 (fr) 1992-12-16

Similar Documents

Publication Publication Date Title
DE602005001816T2 (de) Farbbildröhre
DE3851811T2 (de) Farbbildröhre.
EP0518249B1 (fr) Ensemble d'un masque et d'un cadre pour tube à rayons cathodique couleur
DE69113753T2 (de) Schattenmaskenstruktur einer Farbkathodenstrahlröhre.
DE2661071C2 (fr)
DE69400361T2 (de) Farbkathodenstrahlröhre
DE3650388T2 (de) Farbbildröhre.
DE69400119T2 (de) Farbkathodenstrahlröhre
DE2611335C2 (de) Kathodenstrahlröhre
DE69820530T2 (de) Schattenmaske und Farbkathodenstrahlröre
DE4132781C2 (de) Farbbildröhre mit verbessertem Schattenmaskenrahmen
DD267592A5 (de) Kathodenstrahlroehre mit einer schattenmaske mit niedrigen "overscan"
DE60023865T2 (de) Farbbildröhre mit einer gespannten maske niedrigerer ausdehnung verbunden mit einem rahmen höherer ausdehnung
DE69111491T2 (de) Farbbildröhre mit Schattenmaske/Rahmenträger.
DE2827690A1 (de) Kathodenstrahlroehre mit abgestufter lochmaske
DE1462908B2 (de) Lochmasken farbbildroehre
DE60034773T2 (de) Farbkathodenstrahlröhre mit einer gespannten schattenmaske mit niedrigem ausdehnungskoeffizienten auf einer rahmenstruktur mit höherem ausdehnungskoeffizienten
DE69821051T2 (de) Kathodenstrahlröhre mit Befestigungselementen für den Schattenmaskenrahmen
DD238473A5 (de) Schlitzmaskenelektronenkanone fuer katodenstrahlroehren
DE69931319T2 (de) Schattenmaske für eine Farb-Kathodenstrahlröhre
DE60219457T2 (de) Entspannungslochmaskenrahmen für eine kathodenstrahlröhre
DE602004006754T2 (de) Rahmen-/maskenbaugruppe für eine kathodenstrahlröhre
DE3322250A1 (de) Farbbildroehre mit verbesserter schlitzmusterartiger schattenmaske und verfahren zu deren herstellung
EP0858094B1 (fr) Tube image couleur avec un ensemble masque-cadre
DE60023277T2 (de) Farbbildröhre mit einer an einem rahmen angebrachten gespannten maske

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

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT DE ES GB IT NL

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT DE ES GB IT NL

17P Request for examination filed

Effective date: 19930211

17Q First examination report despatched

Effective date: 19940811

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE ES GB IT NL

REF Corresponds to:

Ref document number: 127956

Country of ref document: AT

Date of ref document: 19950915

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

REF Corresponds to:

Ref document number: 59203638

Country of ref document: DE

Date of ref document: 19951019

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19951025

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2079737

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

NLS Nl: assignments of ep-patents

Owner name: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20050728

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20060604

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20060607

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20060613

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20060630

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20060713

Year of fee payment: 15

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20070609

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070609

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20080101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080101

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070609

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20070611

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070611

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070609