GB1305684A - - Google Patents
Info
- Publication number
- GB1305684A GB1305684A GB1305684DA GB1305684A GB 1305684 A GB1305684 A GB 1305684A GB 1305684D A GB1305684D A GB 1305684DA GB 1305684 A GB1305684 A GB 1305684A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- areas
- exposed
- deposited
- opaque
- 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
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
- H01J9/2278—Application of light absorbing material, e.g. between the luminescent areas
-
- 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
1305684 Colour television tubes ZENITH RADIO CORP 18 June 1971 28635/71 Heading H1D In the manufacture of an opaque layer separating the phosphor dots of a colour television screen, the faceplate 10 of the tube is coated with a continuous opaque layer 11 on which is deposited a photoresist layer 12; this is exposed through a shadow mask 13 by an annular light source so as to leave unexposed dot areas 12a smaller than apertures 13a in the shadow mask and corresponding to the positions of the dots of one colour, and the unexposed areas are removed by a solvent; the opaque areas thus exposed are removed by another solvent and the exposed areas of the photoresist are then removed, and the whole process is repeated for the other colours. The layer 11 may contain a black inorganic pigment or an inorganic material such as manganous carbonate which converts to a pigment (manganese dioxide) on bake-out, and may be included in an acrylic binder soluble in toluene. The layer 12 is preferably an aqueous solution of polyvinyl alcohol and ammonium dichromate. After the opaque layer has been deposed the phosphor areas may be deposited by a slurry process, dusting or by electrophotographic deposition. In a modification, the exposed polyvinyl alcohol layer in the last step is not removed as described above so that some phosphor dots are deposited over it, and it is removed in the baking step.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2863571 | 1971-06-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1305684A true GB1305684A (en) | 1973-02-07 |
Family
ID=10278718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1305684D Expired GB1305684A (en) | 1971-06-18 | 1971-06-18 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1305684A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0025211A1 (en) * | 1979-09-07 | 1981-03-18 | Hitachi, Ltd. | Method of forming fluorescent screens of color picture tubes |
-
1971
- 1971-06-18 GB GB1305684D patent/GB1305684A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0025211A1 (en) * | 1979-09-07 | 1981-03-18 | Hitachi, Ltd. | Method of forming fluorescent screens of color picture tubes |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB960940A (en) | Colour reproducing cathode ray tubes | |
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| GB1311372A (en) | Photographic method for producing a cathode ray tube screen structure | |
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| GB1306766A (en) | Black-surround colour picture tubes | |
| JPS53136039A (en) | Fluoresent substance containing pigment | |
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| GB1305684A (en) | ||
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| CA1009702A (en) | Shadow mask and associated phosphor screen for color cathode ray tube | |
| US2750525A (en) | Cathode-ray tube | |
| GB1331677A (en) | Colour television tubes | |
| GB1455719A (en) | Method for making phosphor screen for black matrix type colour cathode ray tube | |
| CA956498A (en) | Method of manufacturing a black surround luminescent screen for a colour television tube | |
| GB1520859A (en) | Process for the production of colour television picture tubes | |
| GB1374723A (en) | Method for coating only the convex major surface of an apertured mask for a cathode-ray tube | |
| GB1334446A (en) | Luminescent screens | |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |