GB1273459A - Method and apparatus for making colour cathode-ray tube - Google Patents

Method and apparatus for making colour cathode-ray tube

Info

Publication number
GB1273459A
GB1273459A GB5051670A GB5051670A GB1273459A GB 1273459 A GB1273459 A GB 1273459A GB 5051670 A GB5051670 A GB 5051670A GB 5051670 A GB5051670 A GB 5051670A GB 1273459 A GB1273459 A GB 1273459A
Authority
GB
United Kingdom
Prior art keywords
diameter
dot
oct
aperture
tip
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
GB5051670A
Inventor
Kakuichiro Hosokoshi
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 GB1273459A publication Critical patent/GB1273459A/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
    • H01J9/2272—Devices for carrying out the processes, e.g. light houses

Abstract

1,273,459. Luminescent screens. MATSUSHITA ELECTRONICS CORP. 23 Oct., 1970 [30 Oct., 1969], No. 50516/70. Heading HID. In the manufacture of a multi-dot colour screen by a photo-resist process, the light source is a point source which is rotated to form an effective annular source. In Fig. 4 the light source is a glass rod 11 illuminated at its lower end by an ultra-violet lamp (not shown) and mounted eccentrically on a rotating shaft 16 so that the tip 12 describes a circular path. As illustrated, the light passing through an aperture 7 in a shadow mask on to the emulsion 9 has a maximum intensity in a central area 14 which is separated from a penumbra 14<SP>1</SP> by a sharp boundary 14<SP>11</SP>; consequently the penumbral regions 14<SP>1</SP> can be dissolved away to leave well-defined circular dot portions of smaller diameter than the apertures 7. The dot diameter is smaller the larger the diameter of the circle described by the tip 12 which may be larger than the diameter of the aperture 7.
GB5051670A 1969-10-30 1970-10-23 Method and apparatus for making colour cathode-ray tube Expired GB1273459A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8736369 1969-10-30

Publications (1)

Publication Number Publication Date
GB1273459A true GB1273459A (en) 1972-05-10

Family

ID=13912793

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5051670A Expired GB1273459A (en) 1969-10-30 1970-10-23 Method and apparatus for making colour cathode-ray tube

Country Status (4)

Country Link
CA (1) CA922953A (en)
DE (1) DE2053421C2 (en)
FR (1) FR2066748A5 (en)
GB (1) GB1273459A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5129635B2 (en) * 1971-09-21 1976-08-26

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL217309A (en) * 1956-05-16
US3211067A (en) * 1962-06-15 1965-10-12 Rauland Corp Method of exposing a multi-color target structure

Also Published As

Publication number Publication date
CA922953A (en) 1973-03-20
DE2053421C2 (en) 1983-11-03
DE2053421A1 (en) 1971-05-06
FR2066748A5 (en) 1971-08-06

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PE20 Patent expired after termination of 20 years