GB783305A - Improvements in or relating to cathode-ray tubes for reproducing coloured televisionimages - Google Patents
Improvements in or relating to cathode-ray tubes for reproducing coloured televisionimagesInfo
- Publication number
- GB783305A GB783305A GB9762/55A GB976255A GB783305A GB 783305 A GB783305 A GB 783305A GB 9762/55 A GB9762/55 A GB 9762/55A GB 976255 A GB976255 A GB 976255A GB 783305 A GB783305 A GB 783305A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gun
- guns
- lens
- lenses
- image screen
- 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
- 238000010276 construction Methods 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 238000010894 electron beam technology Methods 0.000 abstract 1
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
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/48—Electron guns
- H01J29/51—Arrangements for controlling convergence of a plurality of beams by means of electric field only
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
- H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
- H01J31/20—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
783,305. Colour television tubes. PHILIPS ELECTRICAL INDUSTRIES, Ltd. [April 4, 1955] [April 3, 1954], No. 9762/55. Class 39(1). A colour television tube has at least two guns to one of which is supplied a signal with a larger band-width than the other, that gun having a smaller ratio of the distance electron lens-image screen and electron lens-first crossover than the other gun or guns. The crossover normally coincides with the aperture of the diaphragm between the cathode and the lens. In Fig. 1 (not shown), a central gun is of normal length and two outer guns are shorter, the three guns lying in a plane and the outer electron beam being deflected to bring all three beams into focus at a single point on the image screen. This arrangement is shown in Fig. 2, with the gun axes inclined, each lens including an additional electrode 23, 24, 25 wider than the anode 26, 27, or 28, the extra length of the middle gun permitting relative displacement of the additional electrodes and a more compact spacing of the gun. Similar overlapping of electromagnetic lenses may be obtained, Fig. 3 (not shown). In Fig. 5, the lenses are of different construction, the outer guns comprising electrodes 39, 40, 41, and 42, 43, 44 respectively. The central gun has a wide electrode 46 extending outside the lenses of the other guns. Deflectors 48, 49, 60, 51 bring the outer beams to the point on the image screen struck by the central beam.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL329957X | 1954-04-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB783305A true GB783305A (en) | 1957-09-18 |
Family
ID=19784321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9762/55A Expired GB783305A (en) | 1954-04-03 | 1955-04-04 | Improvements in or relating to cathode-ray tubes for reproducing coloured televisionimages |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US2825845A (en) |
| BE (1) | BE537063A (en) |
| CH (1) | CH329957A (en) |
| DE (1) | DE948616C (en) |
| FR (1) | FR1129948A (en) |
| GB (1) | GB783305A (en) |
| NL (1) | NL186490B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL206590A (en) * | 1955-04-29 | |||
| US3571643A (en) * | 1967-09-20 | 1971-03-23 | Sony Corp | Plural beam electron gun for a color picture tube with different-sized control grid apertures |
| US3755703A (en) * | 1968-04-14 | 1973-08-28 | Sony Corp | Electron gun device for color tube |
| NL7902159A (en) * | 1979-03-20 | 1980-09-23 | Philips Nv | COLOR TELEVISION PICTURE TUBE. |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE482590A (en) * | 1945-09-05 | |||
| US2549072A (en) * | 1946-02-27 | 1951-04-17 | Rca Corp | Recording apparatus for radar systems |
| US2570858A (en) * | 1949-02-26 | 1951-10-09 | Rca Corp | Frequency analyzer |
| US2728025A (en) * | 1951-05-17 | 1955-12-20 | Rca Corp | Post-deflected cathode-ray tubes |
| US2728872A (en) * | 1953-10-23 | 1955-12-27 | Hughes Aircraft Co | Direct-viewing storage tube with character writing electron gun |
-
0
- BE BE537063D patent/BE537063A/xx unknown
- NL NLAANVRAGE7714323,A patent/NL186490B/en unknown
-
1955
- 1955-03-31 DE DEN10427A patent/DE948616C/en not_active Expired
- 1955-04-01 FR FR1129948D patent/FR1129948A/en not_active Expired
- 1955-04-01 US US498676A patent/US2825845A/en not_active Expired - Lifetime
- 1955-04-02 CH CH329957D patent/CH329957A/en unknown
- 1955-04-04 GB GB9762/55A patent/GB783305A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE948616C (en) | 1956-09-06 |
| BE537063A (en) | |
| US2825845A (en) | 1958-03-04 |
| NL186490B (en) | |
| CH329957A (en) | 1958-05-15 |
| FR1129948A (en) | 1957-01-29 |
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