GB1077579A - Method of making mosaic type phosphor screens for cathode ray tubes - Google Patents
Method of making mosaic type phosphor screens for cathode ray tubesInfo
- Publication number
- GB1077579A GB1077579A GB5134764A GB5134764A GB1077579A GB 1077579 A GB1077579 A GB 1077579A GB 5134764 A GB5134764 A GB 5134764A GB 5134764 A GB5134764 A GB 5134764A GB 1077579 A GB1077579 A GB 1077579A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- faceplate
- flood
- exposure
- pattern
- 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
- H01J9/2271—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by photographic processes
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Abstract
1,077,579. Manufacturing luminescent screens. RADIO CORPORATION OF AMERICA. Dec. 17,1964 [Jan. 9, 1994, No. 51347/64. Heading H1D [Also in -Division G2] A method of preparing mosaic phosphor screens for cathode-ray `tubes includes the steps of applying a photo-sensitive screen layer to a foundation plate, exposing the layer both to a pattern of actinic energy and to a flood of actinic energy, the flood exposure being less than that required by itself to significantly insolubilize the layer, and developing the layer. The photo sensitive screen layer comprises polyvinyl alcohol, ammonium dichromate and phosphor which is applied to a tube faceplate having a multi-apertured shadow mask electrode disposed substantially parallel to and spaced from the faceplate, the layer is then flood exposed to ultra-violet light directed from a broad area source through the faceplate 'and then pattern exposed to ultra-violet light through the shadow mask from a point source located substantially at the centre of deflection of the election beam of the finished cathode-ray tube. The pattern exposure may be made before the flood exposure. The flood exposure is made by twentyfive tree-watt lamps arranged in a two dimensional array positioned five inches above the faceplate, and the pattern exposure by a 1 Kw. high pressure mercury arc lamp.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US33680064A | 1964-01-09 | 1964-01-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1077579A true GB1077579A (en) | 1967-08-02 |
Family
ID=23317724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5134764A Expired GB1077579A (en) | 1964-01-09 | 1964-12-17 | Method of making mosaic type phosphor screens for cathode ray tubes |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE658010A (en) |
| ES (1) | ES307844A1 (en) |
| FR (1) | FR1420164A (en) |
| GB (1) | GB1077579A (en) |
| NL (1) | NL6500197A (en) |
-
1964
- 1964-12-17 GB GB5134764A patent/GB1077579A/en not_active Expired
-
1965
- 1965-01-05 ES ES0307844A patent/ES307844A1/en not_active Expired
- 1965-01-07 BE BE658010D patent/BE658010A/xx unknown
- 1965-01-08 FR FR1293A patent/FR1420164A/en not_active Expired
- 1965-01-08 NL NL6500197A patent/NL6500197A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE658010A (en) | 1965-04-30 |
| ES307844A1 (en) | 1965-04-16 |
| NL6500197A (en) | 1965-07-12 |
| FR1420164A (en) | 1965-12-03 |
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