GB696094A - Improvements in or relating to cathode ray tubes - Google Patents
Improvements in or relating to cathode ray tubesInfo
- Publication number
- GB696094A GB696094A GB7896/51A GB789651A GB696094A GB 696094 A GB696094 A GB 696094A GB 7896/51 A GB7896/51 A GB 7896/51A GB 789651 A GB789651 A GB 789651A GB 696094 A GB696094 A GB 696094A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- phosphor
- light
- cathode
- ray tubes
- 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
- 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
- H01J29/185—Luminescent screens measures against halo-phenomena
Abstract
696,094. Cathode-ray tubes. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. April 5, 1951 [May 20, 1950], No. 7896/51. Drawings to Specification. Class 39(i) A cathode-ray tube, especially for television, has a thin transparent glassy layer of phosphor material on the internal side of the tube face, and a coating of a light-absorbent material is provided on the phosphor layer. The object is to obtain a screen providing a high contrast. The phosphor layer is transparent and glassy in the sense of having a non-diffusing character with respect to light rays, although the material of the layer may have an organized crystalline structure in the chemical sense. The phosphor layer may, for example, be produced by volatilizing the phosphor material and precipitating it in a vacuum. The light-absorbent layer may be carbon deposited as lampblack from a source such as an acetylene flame, or aluminium or antimony deposited by evaporation in a low pressure atmosphere.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US696094XA | 1950-05-20 | 1950-05-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB696094A true GB696094A (en) | 1953-08-26 |
Family
ID=22090089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7896/51A Expired GB696094A (en) | 1950-05-20 | 1951-04-05 | Improvements in or relating to cathode ray tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB696094A (en) |
-
1951
- 1951-04-05 GB GB7896/51A patent/GB696094A/en not_active Expired
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