JPS5725645A - Method of forming fluorescent surface for color-picture tube - Google Patents

Method of forming fluorescent surface for color-picture tube

Info

Publication number
JPS5725645A
JPS5725645A JP9994880A JP9994880A JPS5725645A JP S5725645 A JPS5725645 A JP S5725645A JP 9994880 A JP9994880 A JP 9994880A JP 9994880 A JP9994880 A JP 9994880A JP S5725645 A JPS5725645 A JP S5725645A
Authority
JP
Japan
Prior art keywords
layers
phosphor
pigment
color
fluorescent surface
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.)
Pending
Application number
JP9994880A
Other languages
Japanese (ja)
Inventor
Hidetoshi Miura
Toshikuni Miyama
Osamu Matsuzaki
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
Priority to JP9994880A priority Critical patent/JPS5725645A/en
Publication of JPS5725645A publication Critical patent/JPS5725645A/en
Pending 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
    • 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

Landscapes

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

Abstract

PURPOSE:To increase both the brightness and contrast of a fluorescent surface for a color-picture tube, by forming phosphor layers with pigments on the inner surface of a panel, and forming phosphor layers without any pigment on the former phosphor layers. CONSTITUTION:A blue phosphor which has a large grain diameter and is coated with a pigment, and a blue phosphor which has a small grain diameter and is not coated with any pigment are suspended in a PVA solution containing a small amount of a dichromate, thereby a blue phosphor slurry being prepared. Thus prepared phosphor slurry is injected on the inner surface of a glass panel 1 to form a photosensitive film, before the film is exposed and developed, thereby a blue phosphor layer 6b being obtained. After that, a red and a green phosphor layer 6r and 6g are formed by subsequent similar processes. Here, phosphor layers 6' with pigments are formed on the side of the inner surface of the panel 1, while phosphor layers 6'' without any pigment are formed over the layers 6', since the sedimentation velocities of the phosphors vary according to their grain diameters. Consequently, the layers 6' reduce the reflectance of external light, and thereby the contrast of a fluorescent surface for a color-picture tube is increased. Besides, the layers 6'' increase the brightness of the fluorescent surface.
JP9994880A 1980-07-23 1980-07-23 Method of forming fluorescent surface for color-picture tube Pending JPS5725645A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9994880A JPS5725645A (en) 1980-07-23 1980-07-23 Method of forming fluorescent surface for color-picture tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9994880A JPS5725645A (en) 1980-07-23 1980-07-23 Method of forming fluorescent surface for color-picture tube

Publications (1)

Publication Number Publication Date
JPS5725645A true JPS5725645A (en) 1982-02-10

Family

ID=14260922

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9994880A Pending JPS5725645A (en) 1980-07-23 1980-07-23 Method of forming fluorescent surface for color-picture tube

Country Status (1)

Country Link
JP (1) JPS5725645A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62502482A (en) * 1985-04-09 1987-09-24 イ−・アイ・デユポン・デ・ニモアス・アンド・カンパニ− Novel synthetic water-dispersible fiber
US4753834A (en) * 1985-10-07 1988-06-28 Kimberly-Clark Corporation Nonwoven web with improved softness
US4778460A (en) * 1985-10-07 1988-10-18 Kimberly-Clark Corporation Multilayer nonwoven fabric
JPH0351349A (en) * 1989-07-19 1991-03-05 Toray Ind Inc Raised pile web for car seat

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62502482A (en) * 1985-04-09 1987-09-24 イ−・アイ・デユポン・デ・ニモアス・アンド・カンパニ− Novel synthetic water-dispersible fiber
JPH0331803B2 (en) * 1985-04-09 1991-05-08 Ii Ai Deyuhon De Nimoasu Ando Co
US4753834A (en) * 1985-10-07 1988-06-28 Kimberly-Clark Corporation Nonwoven web with improved softness
US4778460A (en) * 1985-10-07 1988-10-18 Kimberly-Clark Corporation Multilayer nonwoven fabric
JPH0351349A (en) * 1989-07-19 1991-03-05 Toray Ind Inc Raised pile web for car seat

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