EP0366523A1 - Schattenmaskenröhre für die Bilderzeugung, insbesondere fürs Farbfernsehen - Google Patents

Schattenmaskenröhre für die Bilderzeugung, insbesondere fürs Farbfernsehen Download PDF

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Publication number
EP0366523A1
EP0366523A1 EP89402864A EP89402864A EP0366523A1 EP 0366523 A1 EP0366523 A1 EP 0366523A1 EP 89402864 A EP89402864 A EP 89402864A EP 89402864 A EP89402864 A EP 89402864A EP 0366523 A1 EP0366523 A1 EP 0366523A1
Authority
EP
European Patent Office
Prior art keywords
heavy metal
silicate
mask
compound
tube
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
EP89402864A
Other languages
English (en)
French (fr)
Other versions
EP0366523B1 (de
Inventor
Franco Bucci
Gabriele Giancaterini
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.)
Thomson Tubes and Displays SA
Original Assignee
Thomson Tubes and Displays SA
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 Thomson Tubes and Displays SA filed Critical Thomson Tubes and Displays SA
Publication of EP0366523A1 publication Critical patent/EP0366523A1/de
Application granted granted Critical
Publication of EP0366523B1 publication Critical patent/EP0366523B1/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
    • 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
    • H01J2229/0777—Coatings

Definitions

  • the invention relates to a mask tube for viewing, in particular color television.
  • a mask-type color television tube is formed by a glass bulb ending in a screen panel on which phosphors are deposited which, when struck by electrons, produce a generally red, green light radiation or blue. These phosphors are arranged on the screen in triads, a triad comprising a green phosphor, a red phosphor and a blue phosphor, each phosphor being excited by a corresponding electron beam.
  • a mask In front of the tube is placed a mask having holes of dimensions and arrangements such that in each triad the phosphor of a determined color is only excited by the electron beam assigned to this color.
  • the invention overcomes this drawback.
  • the heavy metal or the compound of heavy metal is mixed with an alkali silicate, the ratio between the weight of heavy metal, or compound of heavy metal, and the weight of silicate, being between 7 and 17, and preferably equal to 12.
  • the alkali silicate is for example chosen from at least one of the following silicates: potassium silicate, lithium silicate, sodium silicate.
  • an alkaline silicate for example potassium silicate
  • an alkaline silicate allows good adhesion to the metal mask as well as good homogeneity of the mixture of the heavy metal, or of the heavy metal compound, with this silicate.
  • the amount of heavy metal deposited per unit area is greater than with the known technique.
  • the chosen proportion of silicate is sufficiently low so as not to substantially disturb the effect of reduction of heating produced by the heavy metal.
  • this ratio between the weight of heavy metal, or compound of heavy metal, and the weight of silicate ensures optimum adhesion to the metal mask and makes it possible to produce the coating with spraying or spraying equipment.
  • the alkali silicate is stable at high temperature, above 400 ° C, which allows it to withstand the heat treatment undergone by the mask during the manufacture of the tube.
  • the mixture of heavy metal, or of heavy metal compound, with the alkali silicate be formed of grains with dimensions of the order of 0.5 to 0.8 ⁇ m.

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)
  • Chemical Treatment Of Metals (AREA)
EP89402864A 1988-10-25 1989-10-17 Schattenmaskenröhre für die Bilderzeugung, insbesondere fürs Farbfernsehen Expired - Lifetime EP0366523B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8813912A FR2638282B1 (fr) 1988-10-25 1988-10-25 Tube a masque pour la visualisation, notamment la television en couleurs
FR8813912 1988-10-25

Publications (2)

Publication Number Publication Date
EP0366523A1 true EP0366523A1 (de) 1990-05-02
EP0366523B1 EP0366523B1 (de) 1993-08-11

Family

ID=9371243

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89402864A Expired - Lifetime EP0366523B1 (de) 1988-10-25 1989-10-17 Schattenmaskenröhre für die Bilderzeugung, insbesondere fürs Farbfernsehen

Country Status (11)

Country Link
EP (1) EP0366523B1 (de)
JP (1) JPH02297841A (de)
KR (1) KR0130199B1 (de)
CA (1) CA2001321C (de)
DE (1) DE68908338T2 (de)
ES (1) ES2044179T3 (de)
FR (1) FR2638282B1 (de)
PL (1) PL161192B1 (de)
RU (1) RU2035791C1 (de)
TN (1) TNSN89115A1 (de)
TR (1) TR25751A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0522273A1 (de) * 1991-06-07 1993-01-13 Nokia (Deutschland) GmbH Schattenmaske für Bildröhren
EP0682807A4 (de) * 1993-10-28 1996-09-04 Chungwha Picture Tubes Ltd Schattenmaskdämpfungfür kathodenstrahl röhre.
GB2320608A (en) * 1996-12-20 1998-06-24 Samsung Display Devices Co Ltd A shadow mask having an insulating layer and a process for the production of same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW305051B (de) * 1995-09-18 1997-05-11 Hitachi Ltd

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4442376A (en) * 1980-07-16 1984-04-10 U.S. Philips Corporation Color display tube having heavy metal coating on color selection electrode
EP0156427A1 (de) * 1984-03-14 1985-10-02 Koninklijke Philips Electronics N.V. Farbbildwiedergaberöhre

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6050845A (ja) * 1983-08-31 1985-03-20 Toshiba Corp カラ−受像管の製造方法
JPS62281225A (ja) * 1986-05-29 1987-12-07 Mitsubishi Electric Corp カラ−陰極線管の製造方法
JPS62281241A (ja) * 1986-05-29 1987-12-07 Mitsubishi Electric Corp 陰極線管
JPS62283526A (ja) * 1986-05-31 1987-12-09 Mitsubishi Electric Corp シヤドウマスク用電子反射被膜の形成方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4442376A (en) * 1980-07-16 1984-04-10 U.S. Philips Corporation Color display tube having heavy metal coating on color selection electrode
EP0156427A1 (de) * 1984-03-14 1985-10-02 Koninklijke Philips Electronics N.V. Farbbildwiedergaberöhre

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 12, no. 168 (E-611)[3015], 20 mai 1988, page 147 E 611; & JP-A-62 281 241 (MITSUBISHI ELECTRIC CORP.) 07-12-1987 *
PATENT ABSTRACTS OF JAPAN, vol. 9, no. 178 (E-330)[1901], 23 juillet 1985, page 131 E 330; & JP-A-60 50 845 (TOSHIBA K.K.) 20-03-1985 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0522273A1 (de) * 1991-06-07 1993-01-13 Nokia (Deutschland) GmbH Schattenmaske für Bildröhren
EP0682807A4 (de) * 1993-10-28 1996-09-04 Chungwha Picture Tubes Ltd Schattenmaskdämpfungfür kathodenstrahl röhre.
GB2320608A (en) * 1996-12-20 1998-06-24 Samsung Display Devices Co Ltd A shadow mask having an insulating layer and a process for the production of same
NL1007628C2 (nl) * 1996-12-20 1998-08-11 Samsung Display Devices Co Ltd Schaduwmasker met een isolerende laag, alsmede een werkwijze voor de vervaardiging ervan.
DE19654613C2 (de) * 1996-12-20 2001-07-19 Samsung Display Devices Co Ltd Schattenmaske mit Dämmschicht und Verfahren zu ihrer Herstellung
GB2320608B (en) * 1996-12-20 2001-11-07 Samsung Display Devices Co Ltd A shadow mask having an insulating layer and a process for the production of same

Also Published As

Publication number Publication date
KR900007033A (ko) 1990-05-09
CA2001321C (en) 2000-12-19
EP0366523B1 (de) 1993-08-11
FR2638282B1 (fr) 1996-04-05
FR2638282A1 (fr) 1990-04-27
JPH02297841A (ja) 1990-12-10
DE68908338D1 (de) 1993-09-16
PL161192B1 (pl) 1993-05-31
KR0130199B1 (ko) 1998-04-07
ES2044179T3 (es) 1994-01-01
RU2035791C1 (ru) 1995-05-20
CA2001321A1 (en) 1990-04-25
DE68908338T2 (de) 1993-12-16
TNSN89115A1 (fr) 1991-02-04
TR25751A (tr) 1993-07-26

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