GB1340589A - Method for producing phosphor screen - Google Patents

Method for producing phosphor screen

Info

Publication number
GB1340589A
GB1340589A GB5841971A GB5841971A GB1340589A GB 1340589 A GB1340589 A GB 1340589A GB 5841971 A GB5841971 A GB 5841971A GB 5841971 A GB5841971 A GB 5841971A GB 1340589 A GB1340589 A GB 1340589A
Authority
GB
United Kingdom
Prior art keywords
phosphor
screen
areas
dec
acid solution
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
GB5841971A
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electronics 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 Matsushita Electronics Corp filed Critical Matsushita Electronics Corp
Publication of GB1340589A publication Critical patent/GB1340589A/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

Landscapes

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

Abstract

1340589 Luminescent screens MATSUSHITA ELECTRONICS CORP 16 Dec 1971 [18 Dec 1970] 58419/71 Heading H1D [Also in Division G2] In a photo-resist process of making a colour television screen wherein a film of polyvinyl alcohol-dichromate solution containing a phosphor is exposed, e.g. through a shadow mask, and the unexposed areas are washed away with warm water, the screen is then treated with a chromic acid solution to harden the exposed areas so that a subsequently deposited film containing a different phosphor will not stick to them. In the case of a three-colour screen the hardening process should be applied to the first two phosphors to be deposited. The chromic acid solution should have a pH of not more than 2 and a concentration between 0À5 and 10% by weight. Increasing concentration improves the required effect (Fig. 1, not shown) but also reduces the luminance of the phosphor (Fig. 2, not shown), so the optimum is about 5%. The screen may be of the multi-dot or of the multiline type, and may include opaque material between the phosphor areas.
GB5841971A 1970-12-18 1971-12-16 Method for producing phosphor screen Expired GB1340589A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45116099A JPS4935013B1 (en) 1970-12-18 1970-12-18

Publications (1)

Publication Number Publication Date
GB1340589A true GB1340589A (en) 1973-12-12

Family

ID=14678664

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5841971A Expired GB1340589A (en) 1970-12-18 1971-12-16 Method for producing phosphor screen

Country Status (5)

Country Link
US (1) US3753711A (en)
JP (1) JPS4935013B1 (en)
CA (1) CA954364A (en)
FR (1) FR2118808A5 (en)
GB (1) GB1340589A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5546410A (en) * 1978-09-29 1980-04-01 Hitachi Ltd Constructing method of fluorescent screen for color picture tube
JPS6414679U (en) * 1987-07-16 1989-01-25

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB231564A (en) * 1923-11-27 1925-03-10 Anilin Fabrikation Ag A process for hardening colloids
US2766098A (en) * 1952-11-19 1956-10-09 Diamond Alkali Co Method of obtaining a chromiumcontaining tanning substance
US3428454A (en) * 1965-05-03 1969-02-18 Philco Ford Corp Process for depositing particulate solid material on selected portions of a substrate

Also Published As

Publication number Publication date
DE2162886A1 (en) 1972-06-29
JPS4935013B1 (en) 1974-09-19
US3753711A (en) 1973-08-21
FR2118808A5 (en) 1972-07-28
AU3698271A (en) 1973-06-21
DE2162886B2 (en) 1975-04-03
CA954364A (en) 1974-09-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PE20 Patent expired after termination of 20 years