GB1359948A - Method of manufacturing fluorescent screens of colour picture tubes - Google Patents

Method of manufacturing fluorescent screens of colour picture tubes

Info

Publication number
GB1359948A
GB1359948A GB3562472A GB3562472A GB1359948A GB 1359948 A GB1359948 A GB 1359948A GB 3562472 A GB3562472 A GB 3562472A GB 3562472 A GB3562472 A GB 3562472A GB 1359948 A GB1359948 A GB 1359948A
Authority
GB
United Kingdom
Prior art keywords
mask
picture tubes
colour picture
exposure
aperture
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
GB3562472A
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of GB1359948A publication Critical patent/GB1359948A/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
    • H01J9/2271—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by photographic processes
    • 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
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/14—Manufacture of electrodes or electrode systems of non-emitting electrodes
    • H01J9/142—Manufacture of electrodes or electrode systems of non-emitting electrodes of shadow-masks for colour television tubes

Landscapes

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

Abstract

1359948 Colour television tubes HITACHI Ltd 31 July 1972 [9 Aug 1971] 35624/72 Heading H1D A shadow mask of a colour television tube is coated with an organic, transparent, high molecular weight substance 14 so that in each aperture 11 of the mask there is formed a concave lens 14a which reduces the effective diameter of the aperture when the mask is used in the exposure to light of a screen on which a multi-dot phosphor layer is to be formed. The organic substance can be polyvinyl alcohol or polyisobutyl methacrylate. The film is made uniform by spinning the coated mask. After the exposure is complete the film is removed by a solvent or by heat. Reference has been directed by the Comptroller to Specification 1,304,133.
GB3562472A 1971-08-09 1972-07-31 Method of manufacturing fluorescent screens of colour picture tubes Expired GB1359948A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5958371A JPS4826363A (en) 1971-08-09 1971-08-09

Publications (1)

Publication Number Publication Date
GB1359948A true GB1359948A (en) 1974-07-17

Family

ID=13117379

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3562472A Expired GB1359948A (en) 1971-08-09 1972-07-31 Method of manufacturing fluorescent screens of colour picture tubes

Country Status (4)

Country Link
JP (1) JPS4826363A (en)
DE (1) DE2238546A1 (en)
FR (1) FR2148573A1 (en)
GB (1) GB1359948A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5331485B2 (en) * 1974-03-23 1978-09-02
US4680196A (en) * 1985-08-22 1987-07-14 Zenith Electronics Corporation Method for shadow mask protection during manufacture
JPH0764643B2 (en) * 1986-09-17 1995-07-12 ランキサイド テクノロジー カンパニー エル ピー Manufacturing method of self-supporting ceramic containing body

Also Published As

Publication number Publication date
FR2148573A1 (en) 1973-03-23
DE2238546A1 (en) 1973-02-22
JPS4826363A (en) 1973-04-06

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed