EP0366523B1 - Tube à masque pour la visualisation, notamment la télévision en couleurs - Google Patents

Tube à masque pour la visualisation, notamment la télévision en couleurs Download PDF

Info

Publication number: EP0366523B1
Authority: EP; European Patent Office
Prior art keywords: heavy metal; silicate; mask; mainly; tube
Prior art date: 1988-10-25
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

EP89402864A

Other languages

German (de)

English (en)

French (fr)

Other versions

EP0366523A1 (fr

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.)

1988-10-25

Filing date

1989-10-17

Publication date

1993-08-11

1989-10-17 Application filed by Thomson Tubes and Displays SA filed Critical Thomson Tubes and Displays SA

1990-05-02 Publication of EP0366523A1 publication Critical patent/EP0366523A1/fr

1993-08-11 Application granted granted Critical

1993-08-11 Publication of EP0366523B1 publication Critical patent/EP0366523B1/fr

2009-10-17 Anticipated expiration legal-status Critical

Status 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
- 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 on color television in which the face of the iron-based mask opposite the screen is covered with a heavy metal or a heavy metal compound of number atomic greater than 70.
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
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.
FIG. 1 is a view with an electron microscope of the surface of a mask of a color television tube covered with bismuth using a conventional technique
FIG. 2 is a similar view but with use of the invention, that is to say, in this example, a mask surface view covered with a mixture of potassium silicate and bismuth.

Landscapes

Electrodes For Cathode-Ray Tubes (AREA)
Chemical Treatment Of Metals (AREA)

EP89402864A 1988-10-25 1989-10-17 Tube à masque pour la visualisation, notamment la télévision en couleurs Expired - Lifetime EP0366523B1 (fr)

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 EP0366523A1 (fr)	1990-05-02
EP0366523B1 true EP0366523B1 (fr)	1993-08-11

Family

ID=9371243

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP89402864A Expired - Lifetime EP0366523B1 (fr)	1988-10-25	1989-10-17	Tube à masque pour la visualisation, notamment la télévision en couleurs

Country Status (11)

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

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE4118734A1 (de) *	1991-06-07	1992-12-10	Nokia Deutschland Gmbh	Schattenmaske fuer bildroehren
US5451833A (en) *	1993-10-28	1995-09-19	Chunghwa Picture Tubes, Ltd.	Shadow mask damping for color CRT
TW305051B (tr) *	1995-09-18	1997-05-11	Hitachi Ltd
DE19654613C2 (de) *	1996-12-20	2001-07-19	Samsung Display Devices Co Ltd	Schattenmaske mit Dämmschicht und Verfahren zu ihrer Herstellung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3125075C2 (de) *	1980-07-16	1987-01-15	N.V. Philips' Gloeilampenfabrieken, Eindhoven	Farbbildröhre
JPS6050845A (ja) *	1983-08-31	1985-03-20	Toshiba Corp	カラ−受像管の製造方法
NL8400806A (nl) *	1984-03-14	1985-10-01	Philips Nv	Kleurenbeeldbuis.
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

1988
- 1988-10-25 FR FR8813912A patent/FR2638282B1/fr not_active Expired - Lifetime
1989
- 1989-10-17 EP EP89402864A patent/EP0366523B1/fr not_active Expired - Lifetime
- 1989-10-17 ES ES89402864T patent/ES2044179T3/es not_active Expired - Lifetime
- 1989-10-17 DE DE89402864T patent/DE68908338T2/de not_active Expired - Lifetime
- 1989-10-23 TR TR89/0910A patent/TR25751A/tr unknown
- 1989-10-23 KR KR1019890015179A patent/KR0130199B1/ko not_active Expired - Fee Related
- 1989-10-24 RU SU894742256A patent/RU2035791C1/ru active
- 1989-10-24 CA CA002001321A patent/CA2001321C/en not_active Expired - Lifetime
- 1989-10-24 PL PL1989281970A patent/PL161192B1/pl unknown
- 1989-10-25 TN TNTNSN89115A patent/TNSN89115A1/fr unknown
- 1989-10-25 JP JP1276188A patent/JPH02297841A/ja active Pending

Also Published As

Publication number	Publication date
KR900007033A (ko)	1990-05-09
CA2001321C (en)	2000-12-19
FR2638282B1 (fr)	1996-04-05
FR2638282A1 (fr)	1990-04-27
JPH02297841A (ja)	1990-12-10
EP0366523A1 (fr)	1990-05-02
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

Legal Events

Date	Code	Title	Description
1990-03-17	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
1990-05-02	AK	Designated contracting states	Kind code of ref document: A1 Designated state(s): DE ES GB IT NL
1990-12-05	17P	Request for examination filed	Effective date: 19901011
1993-01-20	17Q	First examination report despatched	Effective date: 19921208
1993-06-16	RAP1	Party data changed (applicant data changed or rights of an application transferred)	Owner name: THOMSON TUBES & DISPLAYS SA
1993-06-25	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1993-08-11	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): DE ES GB IT NL
1993-09-16	REF	Corresponds to:	Ref document number: 68908338 Country of ref document: DE Date of ref document: 19930916
1993-09-21	ITF	It: translation for a ep patent filed
1993-10-13	GBT	Gb: translation of ep patent filed (gb section 77(6)(a)/1977)	Effective date: 19930915
1994-01-01	REG	Reference to a national code	Ref country code: ES Ref legal event code: FG2A Ref document number: 2044179 Country of ref document: ES Kind code of ref document: T3
1994-06-11	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1994-06-11	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1994-08-03	26N	No opposition filed
2001-09-26	REG	Reference to a national code	Ref country code: GB Ref legal event code: 746 Effective date: 20010830
2002-01-01	REG	Reference to a national code	Ref country code: GB Ref legal event code: IF02
2003-10-31	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: NL Payment date: 20031031 Year of fee payment: 15
2005-05-01	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: 20050501
2005-07-01	NLV4	Nl: lapsed or anulled due to non-payment of the annual fee	Effective date: 20050501
2008-12-31	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: GB Payment date: 20080929 Year of fee payment: 20
2009-01-30	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: DE Payment date: 20081024 Year of fee payment: 20
2009-02-27	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: ES Payment date: 20081121 Year of fee payment: 20
2009-03-31	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: IT Payment date: 20081028 Year of fee payment: 20
2009-11-11	REG	Reference to a national code	Ref country code: GB Ref legal event code: PE20 Expiry date: 20091016
2009-12-30	REG	Reference to a national code	Ref country code: ES Ref legal event code: FD2A Effective date: 20091019
2010-01-29	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 EXPIRATION OF PROTECTION Effective date: 20091019
2010-04-30	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 EXPIRATION OF PROTECTION Effective date: 20091016

Publication	Publication Date	Title
US4784627A (en)	1988-11-15	Method of forming a glass layer onto a shadow mask
EP0366523B1 (fr)	1993-08-11	Tube à masque pour la visualisation, notamment la télévision en couleurs
US4884004A (en)	1989-11-28	Color cathode-ray tube having a heat dissipative, electron reflective coating on a color selection electrode
US3878427A (en)	1975-04-15	Apertured-mask cathode-ray tube having half-tone array of heat-absorbing areas on target surface
US4565946A (en)	1986-01-21	Color cathode ray tube with infrared emitting phosphor in screen
US5942848A (en)	1999-08-24	Color display device with phosphor regions for emitting red, blue and green light through red-blue color-filler layers and apertures in a black-matrix layer
KR100777270B1 (ko)	2007-11-20	칼라음극선관의 스크린 구조
US3547675A (en)	1970-12-15	Color picture tube
JPS61224245A (ja)	1986-10-04	カラ−受像管
JPS5931826B2 (ja)	1984-08-04	カラ−表示管
KR860000438B1 (ko)	1986-04-19	수 상 관
KR100256314B1 (ko)	2000-08-01	칼라음극선관의 형광면 조성물
US4996459A (en)	1991-02-26	Cathode ray tube for color display
JPS6091534A (ja)	1985-05-22	カラ−受像管の製造方法
KR100228786B1 (ko)	1999-11-01	칼라브라운관의 형광면
US5839935A (en)	1998-11-24	Method for making shadow mask for color picture tube
JPS62283526A (ja)	1987-12-09	シヤドウマスク用電子反射被膜の形成方法
JP2986866B2 (ja)	1999-12-06	陰極線管用黒鉛塗布スラリー液及び陰極線管
JPH0775145B2 (ja)	1995-08-09	カラ−受像管
JPS6340231A (ja)	1988-02-20	シヤドウマスクの表面処理方法
JP2001167712A (ja)	2001-06-22	コントラスト改良カラーｃｒｔとその製造方法
JPS63184237A (ja)	1988-07-29	カラ−受像管およびその製造方法
JPS6261239A (ja)	1987-03-17	カラ−受像管の製造方法
JPS6352422B2 (tr)	1988-10-19
JPH06243805A (ja)	1994-09-02	陰極線管