EP0264116B1 - Schattenmasken-Bildröhre - Google Patents

Schattenmasken-Bildröhre Download PDF

Info

Publication number
EP0264116B1
EP0264116B1 EP87115003A EP87115003A EP0264116B1 EP 0264116 B1 EP0264116 B1 EP 0264116B1 EP 87115003 A EP87115003 A EP 87115003A EP 87115003 A EP87115003 A EP 87115003A EP 0264116 B1 EP0264116 B1 EP 0264116B1
Authority
EP
European Patent Office
Prior art keywords
shadow
picture tube
fact
mask
tube according
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
EP87115003A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0264116A2 (de
EP0264116A3 (en
Inventor
Eberhard Nill
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 Unterhaltungselektronik 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 Unterhaltungselektronik Deutschland GmbH filed Critical Nokia Unterhaltungselektronik Deutschland GmbH
Publication of EP0264116A2 publication Critical patent/EP0264116A2/de
Publication of EP0264116A3 publication Critical patent/EP0264116A3/de
Application granted granted Critical
Publication of EP0264116B1 publication Critical patent/EP0264116B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the invention relates to a shadow mask picture tube with a square glass trough and a glass cone, which are connected to one another via molded-on outer flanges.
  • both the trough and the cone can consist of laminated glass.
  • the shadow mask must be fastened very precisely in the glass body of a shadow mask picture tube, so that the holes in the mask are arranged in exact optical correspondence with the phosphor dots on the screen and also remain during operation. To make matters worse, the mask has to be removed from the tub several times during the manufacturing process of a color picture tube and reinserted into it without the optical correspondence being allowed to suffer. To attach the mask, it was previously provided with a frame and hung up using springs, spring holders and pins.
  • the object of the invention is to simplify and cheapen a shadow mask picture tube and its production.
  • holding plates for the shadow mask are arranged in the picture tube in the region of the corners between the flanges, which are made of a material that has a thermal expansion coefficient matched to the glass material.
  • the shadow mask can be hung up in a simple but reliable and reproducible manner without a mask frame, spring and spring holder being required as before.
  • the invention is based on a glass trough and a glass cone, which are provided with outer flanges 3, 4 (FIG. 2) for connecting the two parts.
  • Fig. 1 a part of the tub 1 is shown seen from the inside.
  • the tub flange 3 has a recess 5 in the corner, in which a holding plate 7 is fastened.
  • the holding plate 7 consists of a material which has a thermal expansion coefficient which is matched to the glass material of the trough.
  • the holding plate 7 is preferably made of ceramic material or an iron-nickel alloy. It is fastened in the recess 5 of the tub flange 3 by means of a suitable, heat-resistant adhesive or by means of a glass frit.
  • the holding plate 7 has a bore into which a fastening pin 9 engages and with which the edge 11 of the mask 10 is fastened to the holding plate 7.
  • edge 11 of the mask 10 is provided with corresponding holes, for example.
  • perforated plates can also be arranged on the mask corners, as described with reference to FIG. 3, reference numeral 14. These platelets can be made of any suitable material.
  • fastening means which permit the mask 10 to be replaced can be used.
  • Other fastening means such as e.g. Rivets, used.
  • FIG. 2 shows a longitudinal section through the trough with the cone attached along the section line A-B from FIG. 1.
  • the holding plate 7 is fastened in the recess 5 of the tub flange 3 by means of a suitable fastening material 15, such as, for example, glass frit. It can be expedient, as shown in FIG. 2, to also provide the cone flange 4 with a corresponding recess 6.
  • the mask 10, which has a window at 12, is fastened in the bore 8 of the holding plate 7 by means of a fastening pin 9.
  • This fastening pin 9 can be designed as a tubular rivet or as a blind rivet.
  • the holding plate 7 can be used at the same time for fastening the shielding cap 13.
  • the attachment shown in FIGS. 1 and 2 is provided at all four corners of the picture tube.
  • the invention results in a significant simplification and cost reduction in the production of the shadow mask picture tube. Since this also results in a reduction in weight, it is particularly advantageous to use the invention in picture tubes whose trough and cone consist of laminated glass, since this results in an overall reduction in weight of the picture tube by approximately 40%.

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)
EP87115003A 1986-10-16 1987-10-14 Schattenmasken-Bildröhre Expired - Lifetime EP0264116B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863635187 DE3635187A1 (de) 1986-10-16 1986-10-16 Schattenmasken-bildroehre
DE3635187 1986-10-16

Publications (3)

Publication Number Publication Date
EP0264116A2 EP0264116A2 (de) 1988-04-20
EP0264116A3 EP0264116A3 (en) 1988-11-30
EP0264116B1 true EP0264116B1 (de) 1990-09-19

Family

ID=6311816

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87115003A Expired - Lifetime EP0264116B1 (de) 1986-10-16 1987-10-14 Schattenmasken-Bildröhre

Country Status (5)

Country Link
US (1) US4806819A (ja)
EP (1) EP0264116B1 (ja)
JP (1) JPS63105435A (ja)
CA (1) CA1277362C (ja)
DE (2) DE3635187A1 (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5162694A (en) * 1989-10-25 1992-11-10 Zenith Electronics Corporation Segmented shadow mask support structure for flat tension mask color crt
WO2000067079A1 (fr) * 1999-04-28 2000-11-09 Citizen Watch Co., Ltd. Horloge electronique et procede de commande de cette horloge

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE532034A (ja) * 1953-10-02
NL150946B (nl) * 1967-06-02 1976-09-15 Philips Nv Kleurentelevisieweergeefbuis.
US3873874A (en) * 1974-02-20 1975-03-25 Gte Sylvania Inc Shield attached by sealing to panel sidewall of cathode ray tube
JPS52152157A (en) * 1976-06-14 1977-12-17 Toshiba Corp Cathode-ray tube
JPS5941793B2 (ja) * 1979-09-10 1984-10-09 凸版印刷株式会社 化粧板の製造方法
US4483452A (en) * 1981-12-07 1984-11-20 Corning Glass Works Television bulb
GB2133210A (en) * 1983-01-07 1984-07-18 Philips Electronic Associated Envelope for a cathode-ray tube
US4593225A (en) * 1984-08-31 1986-06-03 Zenith Electronics Corporation Tension mask colar cathode ray tube

Also Published As

Publication number Publication date
US4806819A (en) 1989-02-21
CA1277362C (en) 1990-12-04
DE3635187A1 (de) 1988-04-21
EP0264116A2 (de) 1988-04-20
EP0264116A3 (en) 1988-11-30
JPS63105435A (ja) 1988-05-10
DE3765075D1 (de) 1990-10-25
JPH05811B2 (ja) 1993-01-06

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