FR2425717A1 - COLOR IMAGE TUBES WITH SLOTTED TYPE PERFORATED MASK - Google Patents

COLOR IMAGE TUBES WITH SLOTTED TYPE PERFORATED MASK

Info

Publication number
FR2425717A1
FR2425717A1 FR7909694A FR7909694A FR2425717A1 FR 2425717 A1 FR2425717 A1 FR 2425717A1 FR 7909694 A FR7909694 A FR 7909694A FR 7909694 A FR7909694 A FR 7909694A FR 2425717 A1 FR2425717 A1 FR 2425717A1
Authority
FR
France
Prior art keywords
mask
color image
ribs
type perforated
perforated mask
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.)
Withdrawn
Application number
FR7909694A
Other languages
French (fr)
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.)
RCA Corp
Original Assignee
RCA Corp
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 RCA Corp filed Critical RCA Corp
Publication of FR2425717A1 publication Critical patent/FR2425717A1/en
Withdrawn legal-status Critical Current

Links

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
    • H01J29/076—Shadow masks for colour television tubes characterised by the shape or distribution of beam-passing apertures

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

TUBE IMAGE COULEUR COMPORTANT UN MASQUE PERFORE DU TYPE A FENTES DANS LEQUEL LES FENTES DE CE MASQUE SONT DISPOSEES EN COLONNES VERTICALES ET LES FENTES DE CHAQUE COLONNE SONT SEPAREES VERTICALEMENT PAR DES NERVURES ET DANS LEQUEL L'OUVERTURE LA PLUS REDUITE DE CHAQUE FENTE PERMETTANT LE PASSAGE D'UN FAISCEAU ELECTRONIQUE EST DEFINIE COMME ETANT LA GORGE DE LA FENTE, CE TUBE IMAGE COULEUR ETANT CARACTERISE EN CE QUE LES PAROIS DE LA NERVURE, SUR UN COTE AU MOINS DESDITES NERVURES, SONT ORIENTEES PARALLELEMENT A LA DIRECTION DE L'INCIDENCE DU FAISCEAU ELECTRONIQUE, PAR RAPPORT AUDIT MASQUE, EN CE QUE LA PENTE DESDITES PAROIS PAR RAPPORT A UNE SURFACE DU MASQUE SUR CE COTE AU MOINS DESDITES NERVURES FAISANT FACE A UN AXE HORIZONTAL DE SYMETRIE H-H DUDIT MASQUE, CHANGE LORSQUE CHANGE LA DISTANCE PAR RAPPORT A CET AXE HORIZONTAL DE SYMETRIE ET EN CE QUE TOUTES LES PARTIES DES GORGES DES PENTES SONT PLUS RAPPROCHEES D'UNE SURFACE DU MASQUE QUE DU CENTRE DE L'EPAISSEUR DU MASQUE.COLOR IMAGE TUBE INCLUDING A SLOT-TYPE PERFORATED MASK IN WHICH THE SLOTS OF THIS MASK ARE ARRANGED IN VERTICAL COLUMNS AND THE SLOTS OF EACH COLUMN ARE VERTICALLY SEPARATED BY RIBS AND IN WHICH THE SMALLEST OPENING OF EACH SLIT PASSED. OF AN ELECTRONIC BEAM IS DEFINED TO BE THE THROAT OF THE SLIT, THIS COLOR IMAGE TUBE CHARACTERIZED IN THAT THE WALLS OF THE RIB, ON ONE SIDE AT LEAST OF THE SAID RIBS, ARE ORIENTED IN PARALLEL TO THE DIRECTION OF THE HARNESS INCIDENCE ELECTRONIC, IN RELATION TO THE MASK AUDIT, IN THAT THE SLOPE OF THE SAID WALLS IN RELATION TO A SURFACE OF THE MASK ON THIS SIDE AT LEAST OF THE SAID RIBS FACING A HORIZONTAL AXIS OF SYMMETRY HH OF THE SAID MASK, CHANGES WHEN THE DISTANCE IS CHANGED FROM THIS AXIS HORIZONTAL IN SYMMETRY AND IN THAT ALL PARTS OF THE SLOPES OF THE SLOPES ARE CLOSER TO A MASK SURFACE THAN THE CENTER OF THE THICKNESS OF THE MASK.

FR7909694A 1978-05-10 1979-04-18 COLOR IMAGE TUBES WITH SLOTTED TYPE PERFORATED MASK Withdrawn FR2425717A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US90454378A 1978-05-10 1978-05-10

Publications (1)

Publication Number Publication Date
FR2425717A1 true FR2425717A1 (en) 1979-12-07

Family

ID=25419335

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7909694A Withdrawn FR2425717A1 (en) 1978-05-10 1979-04-18 COLOR IMAGE TUBES WITH SLOTTED TYPE PERFORATED MASK

Country Status (9)

Country Link
JP (1) JPS54147775A (en)
BR (1) BR7902434A (en)
DD (1) DD144621A5 (en)
DE (1) DE2914839A1 (en)
FI (1) FI791257A (en)
FR (1) FR2425717A1 (en)
GB (1) GB2020892A (en)
IT (1) IT1112302B (en)
PL (1) PL215496A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2906611C2 (en) * 1979-02-21 1985-05-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Method of manufacturing a color selection mask for a color cathode ray tube
US4293792A (en) * 1979-12-18 1981-10-06 Rca Corporation Color picture tube having improved slit type shadow mask
JPS577041A (en) * 1980-05-12 1982-01-14 Buckbee Mears Co Structure with visual sense opening line and method of manufacturing same
CA1175876A (en) * 1980-05-12 1984-10-09 Roland Thoms Television picture tubes and hole technology
US4429028A (en) * 1982-06-22 1984-01-31 Rca Corporation Color picture tube having improved slit type shadow mask and method of making same
US4632726A (en) * 1984-07-13 1986-12-30 Bmc Industries, Inc. Multi-graded aperture mask method
JPH07320652A (en) * 1994-05-27 1995-12-08 Toshiba Corp Manufacture of color picture tube and shadow mask
TW378334B (en) * 1994-10-14 2000-01-01 Thomson Consumer Electronics Method of forming an enhanced resolution shadow mask

Also Published As

Publication number Publication date
DE2914839A1 (en) 1979-11-15
IT7921930A0 (en) 1979-04-17
DD144621A5 (en) 1980-10-22
PL215496A1 (en) 1980-03-24
GB2020892A (en) 1979-11-21
IT1112302B (en) 1986-01-13
FI791257A (en) 1979-11-11
JPS54147775A (en) 1979-11-19
BR7902434A (en) 1979-12-11

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Legal Events

Date Code Title Description
ST Notification of lapse