JPS5711458A - Cathode-ray tube - Google Patents
Cathode-ray tubeInfo
- Publication number
- JPS5711458A JPS5711458A JP8426180A JP8426180A JPS5711458A JP S5711458 A JPS5711458 A JP S5711458A JP 8426180 A JP8426180 A JP 8426180A JP 8426180 A JP8426180 A JP 8426180A JP S5711458 A JPS5711458 A JP S5711458A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- cathode
- aspect ratio
- phosphor screen
- aperture
- 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.)
- Pending
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
- H01J29/488—Schematic arrangements of the electrodes for beam forming; Place and form of the elecrodes
Abstract
PURPOSE:To form on a phosphor screen a spot with small diametrical width in the scanning direction by focussing an electron beam which passed through an aperture with a smaller aspect ratio than that of the beam spot on the phosphor screen, using a ring-shaped permanent magnet. CONSTITUTION:An electron gun EG used for a cathode-ray tube consists of a cathode K, current control electrode G1, beam lead electrode G2, acceleration electrode G3 and beam focussing magnet ring M. An aperture [A] with a smaller aspect ratio (for example, 2:1) than that (for example, 3:1) of the cross section which is irradiated on a phosphor screen is formed at a current limiting electrode G1 and the magnet ring M is fixed to the acceleration electrode G3 by an insulating jig S so that its centering can universally adjusted. This can form a lengthwise long beam whose aspect ratio is not exceedingly large and prevent the saturation of the color of a beam index table and deterioration of color purity.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8426180A JPS5711458A (en) | 1980-06-20 | 1980-06-20 | Cathode-ray tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8426180A JPS5711458A (en) | 1980-06-20 | 1980-06-20 | Cathode-ray tube |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5711458A true JPS5711458A (en) | 1982-01-21 |
Family
ID=13825507
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8426180A Pending JPS5711458A (en) | 1980-06-20 | 1980-06-20 | Cathode-ray tube |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5711458A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0721939A (en) * | 1991-12-30 | 1995-01-24 | Samsung Display Devices Co Ltd | Cathode-ray tube |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5026274U (en) * | 1973-07-03 | 1975-03-26 |
-
1980
- 1980-06-20 JP JP8426180A patent/JPS5711458A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5026274U (en) * | 1973-07-03 | 1975-03-26 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0721939A (en) * | 1991-12-30 | 1995-01-24 | Samsung Display Devices Co Ltd | Cathode-ray tube |
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