GB1223584A - Plural beam electron gun for a color picture tube - Google Patents
Plural beam electron gun for a color picture tubeInfo
- Publication number
- GB1223584A GB1223584A GB4431668A GB4431668A GB1223584A GB 1223584 A GB1223584 A GB 1223584A GB 4431668 A GB4431668 A GB 4431668A GB 4431668 A GB4431668 A GB 4431668A GB 1223584 A GB1223584 A GB 1223584A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blue
- grid
- beams
- common
- electron gun
- 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
- H01J29/48—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
- H01J31/201—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 using a colour-selection electrode
- H01J31/203—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 using a colour-selection electrode with more than one electron beam
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
1,223,584. Colour television tubes. SONY CORP. 18 Sept., 1968 [20 Sept., 1967], No. 44316/68. Heading HID. In a colour television tube using red, blue and green phosphors the blue phosphor saturates at a lower beam current density than the other two phosphors and thereby limits the brightness of the picture if the white balance is to be preserved; this difficulty is avoided by defocusing the blue beam so that the maximum beam density gives greater apparent brightness for each blue spot. In Fig. 3 the triple electron gun has a common control grid G wherein the aperture glB for the blue beam is of greater diameter than the other two apertures. The cathode K B for the blue beam is spaced from the grid by a distance d 1 substantially greater than the spacing d 2 of the other cathodes; this has the effect that the cross-over for the blue beam lies outside the object plane of an electrostatic focusing lens common to the three beams. Alternative arrangements use separate cathodes with separate control grids (Figs. 5 and 6, not shown) or a common cathode with separate control grids (Figs. 7 and 8, not shown). As described the gun is applied to a tube using coplanar beams, the outer beams being converged at the plane of a beam selecting grid or mask by a fixed deflecting system (Fig. 1, not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6013467 | 1967-09-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1223584A true GB1223584A (en) | 1971-02-24 |
Family
ID=13133349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4431668A Expired GB1223584A (en) | 1967-09-20 | 1968-09-18 | Plural beam electron gun for a color picture tube |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR1580743A (en) |
| GB (1) | GB1223584A (en) |
| NL (1) | NL6813530A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2135818A (en) * | 1983-02-15 | 1984-09-05 | Sony Corp | Television receivers |
-
1968
- 1968-09-18 GB GB4431668A patent/GB1223584A/en not_active Expired
- 1968-09-20 FR FR1580743D patent/FR1580743A/fr not_active Expired
- 1968-09-20 NL NL6813530A patent/NL6813530A/xx unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2135818A (en) * | 1983-02-15 | 1984-09-05 | Sony Corp | Television receivers |
Also Published As
| Publication number | Publication date |
|---|---|
| NL6813530A (en) | 1969-03-24 |
| FR1580743A (en) | 1969-09-05 |
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