GB1257516A - - Google Patents
Info
- Publication number
- GB1257516A GB1257516A GB1257516DA GB1257516A GB 1257516 A GB1257516 A GB 1257516A GB 1257516D A GB1257516D A GB 1257516DA GB 1257516 A GB1257516 A GB 1257516A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- cathode
- bar
- electron beam
- acceleration
- 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
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
1,257,516. Cathode-ray display tubes. M-O VALVE CO. Ltd. 27 Oct., 1970 [20 Nov., 1969], No. 56835/69. Heading H1D. In a cathode-ray display tube using postdeflection acceleration, wherein the deflection system is shielded from the acceleration field by means of a grid electrode, the grid is supported over at least a part of its periphery by a frame member which is shaped so that the electron beam can strike it substantially only in regions from which secondary electrons and/or reflected electrons do not reach the screen, thereby reducing "flare". In Fig. 2 the grid 17 comprises a number of parallel wires 18 extending between a pair of bars 19 of 4 x 4 mm. cross-section which are held apart by spacers (not shown). A strip of metal 20 0À2 mm. in thickness is welded along the edge of each bar to prevent the electron beam from striking the surface 22. In another arrangement (Fig. 3, not shown) the surfaces 22 are bevelled so that they are protected from the beam by the projecting portion of each bar on the side nearest the deflecting system. The accelerating field may be provided by a resistive wall coating joined at each end to graphite wall coatings (Fig. 1, not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5683569 | 1969-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1257516A true GB1257516A (en) | 1971-12-22 |
Family
ID=10477671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1257516D Expired GB1257516A (en) | 1969-11-20 | 1969-11-20 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1257516A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2310079A (en) * | 1996-02-07 | 1997-08-13 | Sony Corp | Cathode ray tube |
-
1969
- 1969-11-20 GB GB1257516D patent/GB1257516A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2310079A (en) * | 1996-02-07 | 1997-08-13 | Sony Corp | Cathode ray tube |
| GB2310079B (en) * | 1996-02-07 | 2000-10-04 | Sony Corp | Cathode ray tube |
| SG89246A1 (en) * | 1996-02-07 | 2002-06-18 | Sony Corp | Cathode ray tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |