GB1331677A - Colour television tubes - Google Patents

Colour television tubes

Info

Publication number
GB1331677A
GB1331677A GB3872771A GB3872771A GB1331677A GB 1331677 A GB1331677 A GB 1331677A GB 3872771 A GB3872771 A GB 3872771A GB 3872771 A GB3872771 A GB 3872771A GB 1331677 A GB1331677 A GB 1331677A
Authority
GB
United Kingdom
Prior art keywords
layer
opaque material
coating
pva
cathode ray
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
Application number
GB3872771A
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.)
CBS Corp
Original Assignee
Westinghouse Electric 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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB1331677A publication Critical patent/GB1331677A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • H01J9/22—Applying luminescent coatings
    • H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
    • H01J9/2278—Application of light absorbing material, e.g. between the luminescent areas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • H01J9/22—Applying luminescent coatings
    • H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
    • H01J9/2271—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by photographic processes

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

1331677 Cathode ray tubes WESTING- HOUSE ELECTRIC CORP 18 Aug 1971 [18 June 1971] 38727/71 Heading H1D A cathode ray tube using a shadow mask 22 for colour selection is provided with a coating 40 of opaque material, such as Aquaday (Registered Trade Mark), extending from the periphery of the picture area back along the skirt 34 of the face plate 32. The coating may be applied by applying a layer of PVA to the screen, exposing through the shadow mask and treating the layer to remove all except the picture area, covering with the opaque material then removing the PVA with the overlying opaque material to leave the desired peripheral coating. The phosphor layer 24 and an aluminium layer 28 are then applied in the conventional way.
GB3872771A 1971-06-18 1971-08-18 Colour television tubes Expired GB1331677A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15440871A 1971-06-18 1971-06-18

Publications (1)

Publication Number Publication Date
GB1331677A true GB1331677A (en) 1973-09-26

Family

ID=22551244

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3872771A Expired GB1331677A (en) 1971-06-18 1971-08-18 Colour television tubes

Country Status (4)

Country Link
JP (1) JPS5143749B1 (en)
AT (1) AT310266B (en)
DE (1) DE2141592A1 (en)
GB (1) GB1331677A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2277831A (en) * 1993-05-03 1994-11-09 Philips Electronics Nv Reducing scattered light in projection television tubes

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7406378A (en) * 1974-05-13 1975-11-17 Philips Nv METHOD OF MANUFACTURING A SHADOW MASK TUBE FOR DISPLAYING COLORED IMAGES AND TUBE MADE IN ACCORDANCE WITH THIS METHOD.
JPS5316750U (en) * 1976-07-23 1978-02-13
DE2903735A1 (en) * 1979-02-01 1980-08-07 Standard Elektrik Lorenz Ag Conductive cathode ray tube layer - applied after coating bare areas with lacquer film
DE19619972C1 (en) * 1996-05-17 1997-10-23 Daimler Benz Ag Conductive edge coating on phosphor at rear of cathode ray tube screen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2277831A (en) * 1993-05-03 1994-11-09 Philips Electronics Nv Reducing scattered light in projection television tubes
GB2277831B (en) * 1993-05-03 1996-12-11 Philips Electronics Nv Reducing scattered light in projection television tubes

Also Published As

Publication number Publication date
JPS5143749B1 (en) 1976-11-24
AT310266B (en) 1973-09-25
DE2141592A1 (en) 1972-12-21
AU4243772A (en) 1973-11-22

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee