GB1242999A - Improvements relating to luminescent screens - Google Patents

Improvements relating to luminescent screens

Info

Publication number
GB1242999A
GB1242999A GB2656670A GB2656670A GB1242999A GB 1242999 A GB1242999 A GB 1242999A GB 2656670 A GB2656670 A GB 2656670A GB 2656670 A GB2656670 A GB 2656670A GB 1242999 A GB1242999 A GB 1242999A
Authority
GB
United Kingdom
Prior art keywords
luminescent
areas
charged
particles
light absorbing
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
GB2656670A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1242999A publication Critical patent/GB1242999A/en
Expired 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
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/30—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines
    • H01J29/32—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television
    • H01J29/327—Black matrix materials
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G13/00—Electrographic processes using a charge pattern
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/02—Charge-receiving layers
    • G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/12—Developers with toner particles in liquid developer mixtures
    • 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
    • H01J9/2276—Development of latent electrostatic images
    • 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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/16—Picture reproducers using cathode ray tubes

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

1,242,999. Colour cathode-ray display tubes. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 2 June, 1970 [5 June, 1969], No. 26566/70. Heading H1D. A method of manufacturing a c.r.t. luminescent screen wherein the screen includes discrete luminescent areas of differently coloured emissions (e.g. red, green, blue) separated by particles of a light-absorbing substance comprises depositing the light absorbing substance electrophotographically. For the same contrast, the window glass tinting can be reduced or omitted. In fabrication, a conductive layer is provided on the support and superposed by a photoconductive layer charged by a corona discharge. The areas corresponding to luminescent areas are discharged by exposure and charged light absorbing particles adhered to the remaining areas. The luminescent areas may be similarly applied electrophotographically, using oppositely charged luminescent particles or alternatively, the conductive and p.c. layers removed by firing, the light absorbing material adhered by adhesive, and the luminescent surfaces provided by a photosensitive lacquer. In examples, the conductive layer of polyvinyl alcohol with choline chloride additions is dried, a polyvinyl carbazole photoconductive layer applied and charged negatively by a corona discharge, the layer exposed three times through a shadow mask, and a liquid containing positively charged particles of a light absorbing substance, e.g. MnO 2 , is applied adhering to the unexposed areas, the liquid decanted off and the screen dried. The p.c. layer is then charged positively, exposed, and positively charged luminescent material applied to the exposed areas.
GB2656670A 1969-06-05 1970-06-02 Improvements relating to luminescent screens Expired GB1242999A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6908600A NL6908600A (en) 1969-06-05 1969-06-05

Publications (1)

Publication Number Publication Date
GB1242999A true GB1242999A (en) 1971-08-18

Family

ID=19807121

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2656670A Expired GB1242999A (en) 1969-06-05 1970-06-02 Improvements relating to luminescent screens

Country Status (7)

Country Link
BE (1) BE751426A (en)
BR (1) BR7019561D0 (en)
CA (1) CA923353A (en)
DE (1) DE2027263C3 (en)
FR (1) FR2049993A5 (en)
GB (1) GB1242999A (en)
NL (1) NL6908600A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4891110A (en) * 1986-11-10 1990-01-02 Zenith Electronics Corporation Cataphoretic process for screening color cathode ray tubes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4891110A (en) * 1986-11-10 1990-01-02 Zenith Electronics Corporation Cataphoretic process for screening color cathode ray tubes

Also Published As

Publication number Publication date
DE2027263B2 (en) 1978-11-23
FR2049993A5 (en) 1971-03-26
BR7019561D0 (en) 1973-03-29
DE2027263A1 (en) 1970-12-10
BE751426A (en) 1970-12-03
NL6908600A (en) 1970-12-08
DE2027263C3 (en) 1979-08-02
CA923353A (en) 1973-03-27

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