GB1324565A - Cathode-ray tubes - Google Patents
Cathode-ray tubesInfo
- Publication number
- GB1324565A GB1324565A GB1326971A GB1326971A GB1324565A GB 1324565 A GB1324565 A GB 1324565A GB 1326971 A GB1326971 A GB 1326971A GB 1326971 A GB1326971 A GB 1326971A GB 1324565 A GB1324565 A GB 1324565A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tubes
- screen electrode
- hollow member
- adjacent
- edge
- 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
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/80—Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration, for colour switching
-
- 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
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/89—Optical or photographic arrangements structurally combined or co-operating with the vessel
- H01J29/896—Anti-reflection means, e.g. eliminating glare due to ambient light
Landscapes
- Electrodes For Cathode-Ray Tubes (AREA)
Abstract
1324565 Cathode-ray tubes and image pick-up tubes SIEMENS AG 5 May 1971 [14 May 1970] 13269/71 Heading H1D A cathode-ray tube includes a post-deflection accelerating lens comprising electrically conductive hollow member 2, with open exit and entry apertures, the edge of the member adjacent the screen electrode being shaped so that the perpendicular distance from the plane of the screen electrode is less at the corners than at the middle of any edge of the screen electrode 1. Preferably the edge of the hollow member adjacent the screen electrode is matched to the symmetry of the screen electrode. The hollow member may be shaped as a cone or pyramid, or may be cone-shaped adjacent the deflection system and merge into a pyramidal shape adjacent the screen electrode. Also the member may be a lining or coating on the tube envelope. Reference is made to pin cushion distortion and lack of definition and elimination of errors formed by employing an open exit aperture instead of a metal gauze exit aperture. The potential differences between the screen electrode and hollow member will be larger, the greater the angle between the central beam path and the wall of the hollow member. With tubes incorporating a mask before the screen, the accelerating field is applied to take effect before impingement of the electrons on the mask, and in multi-gun tubes this may lead to a reduction in convergence difficulties and increase in brightness. Applicability to tubes having central deflection systems such as oscilloscope tubes, monochrome or colour picture tubes and camera tubes employing high velocity electron beams is exemplified.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19702023681 DE2023681A1 (en) | 1970-05-14 | 1970-05-14 | Cathode ray tube with a rectifying lens |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1324565A true GB1324565A (en) | 1973-07-25 |
Family
ID=5771150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1326971A Expired GB1324565A (en) | 1970-05-14 | 1971-05-05 | Cathode-ray tubes |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2023681A1 (en) |
FR (1) | FR2091547A5 (en) |
GB (1) | GB1324565A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4585976A (en) * | 1982-01-19 | 1986-04-29 | Hewlett-Packard Company | Beam penetration CRT with internal automatic constant deflection factor and pattern correction |
DE3280208D1 (en) * | 1982-01-19 | 1990-08-16 | Hewlett Packard Co | Penetration cathode ray tubes. |
-
1970
- 1970-05-14 DE DE19702023681 patent/DE2023681A1/en active Pending
-
1971
- 1971-05-05 GB GB1326971A patent/GB1324565A/en not_active Expired
- 1971-05-13 FR FR7117290A patent/FR2091547A5/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2023681A1 (en) | 1971-12-30 |
FR2091547A5 (en) | 1972-01-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |