GB804958A - Processing phosphor screens for cathode ray tubes - Google Patents

Processing phosphor screens for cathode ray tubes

Info

Publication number
GB804958A
GB804958A GB19782/56A GB1978256A GB804958A GB 804958 A GB804958 A GB 804958A GB 19782/56 A GB19782/56 A GB 19782/56A GB 1978256 A GB1978256 A GB 1978256A GB 804958 A GB804958 A GB 804958A
Authority
GB
United Kingdom
Prior art keywords
layer
exposed
developed
phosphor
screen
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
GB19782/56A
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.)
GTE Sylvania Inc
Original Assignee
Sylvania Electric Products Inc
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 Sylvania Electric Products Inc filed Critical Sylvania Electric Products Inc
Publication of GB804958A publication Critical patent/GB804958A/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
    • 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
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/187—Luminescent screens screens with more than one luminescent material (as mixtures for the treatment of the screens)

Abstract

804,958. Processing luminescent screens. SYLVANIA ELECTRIC PRODUCTS, Inc. June 26, 1956 [June 27, 1:955], No. 19782/56. Class 39(1). In a radiant energy printing operation for forming a phosphor pattern on the screen of a cathode ray tube, the powdered phosphor material is applied to a layer of undeveloped radient energy sensitive material, which may itself be mixed with the phosphor material, whilst that layer is still tacky. The layer is thereafter exposed and developed. Alternatively a first sensitive layer may be applied to the screen and thereafter a second layer on to which the powdered phosphor is dusted whilst the second layer is still tacky. The first layer may be exposed and developed, exposed but not developed, or neither exposed nor developed before application of the second layer. The second layer is exposed and developed after the application of the phosphor powder but if the first layer is only exposed and not developed the exposure of the second layer is not essential. The radiant energy sensitive material may be light sensitive, e.g. dichromate sensitized polyvinyl alcohol and dichromate sensitized polyvinyl alcohol and the process may be repeated for each phosphor in a screen for a colour tube.
GB19782/56A 1955-06-27 1956-06-26 Processing phosphor screens for cathode ray tubes Expired GB804958A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US804958XA 1955-06-27 1955-06-27

Publications (1)

Publication Number Publication Date
GB804958A true GB804958A (en) 1958-11-26

Family

ID=22157751

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19782/56A Expired GB804958A (en) 1955-06-27 1956-06-26 Processing phosphor screens for cathode ray tubes

Country Status (1)

Country Link
GB (1) GB804958A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3483010A (en) * 1966-10-03 1969-12-09 Sylvania Electric Prod Method of applying particulate matter to a surface

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3483010A (en) * 1966-10-03 1969-12-09 Sylvania Electric Prod Method of applying particulate matter to a surface

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