JPS57208036A - High-voltage treatment of cathode-ray tube - Google Patents
High-voltage treatment of cathode-ray tubeInfo
- Publication number
- JPS57208036A JPS57208036A JP9302581A JP9302581A JPS57208036A JP S57208036 A JPS57208036 A JP S57208036A JP 9302581 A JP9302581 A JP 9302581A JP 9302581 A JP9302581 A JP 9302581A JP S57208036 A JPS57208036 A JP S57208036A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- applying
- electrodes
- tube
- cathode
- 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
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/44—Factory adjustment of completed discharge tubes or lamps to comply with desired tolerances
- H01J9/445—Aging of tubes or lamps, e.g. by "spot knocking"
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
PURPOSE:To enable a high-quality cathode-ray tube with an excellent voltage- resisting characteristic to be obtained by subjecting the tube to high-voltage treatment by performing high-voltage ageing of the electrodes of an electron gun, without causing any spark flaw or goass separation of the inner wall of the neck of the tube. CONSTITUTION:A part of a focusing electrode group, a high-voltage-applied electrode group, which forms a main electron lens part is subjected to high- voltage treatment by developing compulsory discharge between the focusing electrodes by, for example, applying a high voltage of rectified half-waves across them, while applying a magnetic field across them by installing a cylinderical magnet onthe outer wall of the neck of a cathode-ray tube corresponding to the main electron lens forming part of the focusing electrode group. The spark flaw and the glass separation of the inner wall of the glass is widely reduced by applying a high voltage across the focusing electrodes 18, 19 ... forming the main electron lens part, while applying a magnetic field 22 extending along the axis (Z) of the tube across the electrodes 18, 19 ....
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9302581A JPS57208036A (en) | 1981-06-18 | 1981-06-18 | High-voltage treatment of cathode-ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9302581A JPS57208036A (en) | 1981-06-18 | 1981-06-18 | High-voltage treatment of cathode-ray tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57208036A true JPS57208036A (en) | 1982-12-21 |
Family
ID=14070942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9302581A Pending JPS57208036A (en) | 1981-06-18 | 1981-06-18 | High-voltage treatment of cathode-ray tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57208036A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6158140A (en) * | 1984-08-30 | 1986-03-25 | Toshiba Corp | Manufacture of cathode-ray tube |
-
1981
- 1981-06-18 JP JP9302581A patent/JPS57208036A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6158140A (en) * | 1984-08-30 | 1986-03-25 | Toshiba Corp | Manufacture of cathode-ray tube |
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