JPS5549838A - Treating method for electron gun - Google Patents
Treating method for electron gunInfo
- Publication number
- JPS5549838A JPS5549838A JP12203078A JP12203078A JPS5549838A JP S5549838 A JPS5549838 A JP S5549838A JP 12203078 A JP12203078 A JP 12203078A JP 12203078 A JP12203078 A JP 12203078A JP S5549838 A JPS5549838 A JP S5549838A
- Authority
- JP
- Japan
- Prior art keywords
- grid
- red
- voltage
- heating
- impressed onto
- 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.)
- Granted
Links
Abstract
PURPOSE: To obtain a cathode-ray tube having good picture quality by adding the process for heating the desired part of the second grid before or after ordinary cleaning process and completely removing a stray-emission source.
CONSTITUTION: A stationary voltage is impressed onto the cathode 17 of an electron gun 16, and earthening voltage is impressed onto the first grid 18 and the third grid, and the potential of 400W500V is impressed onto the second grid 19, and the second grid is red-heated. At a result of this heating during 2W3min, the stray emission source is destroyed due to the red-heating of the second grid 19, and the electron beam through-hole of the second grid 19 and its vicinity are perfectly cleaned. In this case, if the voltage is at the degree that the second grid 19 is red-heated, the dangers such as crack of insulated supporting body and generation of in-tube glow are almost eliminated.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12203078A JPS5549838A (en) | 1978-10-05 | 1978-10-05 | Treating method for electron gun |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12203078A JPS5549838A (en) | 1978-10-05 | 1978-10-05 | Treating method for electron gun |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5549838A true JPS5549838A (en) | 1980-04-10 |
JPS6237501B2 JPS6237501B2 (en) | 1987-08-12 |
Family
ID=14825847
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12203078A Granted JPS5549838A (en) | 1978-10-05 | 1978-10-05 | Treating method for electron gun |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5549838A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5732553A (en) * | 1980-08-04 | 1982-02-22 | Mitsubishi Electric Corp | Manufacture of cathode ray tube |
JPS63110523A (en) * | 1986-10-28 | 1988-05-16 | Sony Corp | Treatment of electron gun |
US4832646A (en) * | 1986-06-19 | 1989-05-23 | North American Philips Consumer Electronics Corp. | Aging process for cathode ray tubes |
-
1978
- 1978-10-05 JP JP12203078A patent/JPS5549838A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5732553A (en) * | 1980-08-04 | 1982-02-22 | Mitsubishi Electric Corp | Manufacture of cathode ray tube |
US4832646A (en) * | 1986-06-19 | 1989-05-23 | North American Philips Consumer Electronics Corp. | Aging process for cathode ray tubes |
JPS63110523A (en) * | 1986-10-28 | 1988-05-16 | Sony Corp | Treatment of electron gun |
Also Published As
Publication number | Publication date |
---|---|
JPS6237501B2 (en) | 1987-08-12 |
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