JPS6478579A - High voltage control circuit for cathode ray tube - Google Patents
High voltage control circuit for cathode ray tubeInfo
- Publication number
- JPS6478579A JPS6478579A JP23496687A JP23496687A JPS6478579A JP S6478579 A JPS6478579 A JP S6478579A JP 23496687 A JP23496687 A JP 23496687A JP 23496687 A JP23496687 A JP 23496687A JP S6478579 A JPS6478579 A JP S6478579A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- video signal
- change
- added
- voltage control
- 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
Landscapes
- Details Of Television Scanning (AREA)
Abstract
PURPOSE:To suppress the distortion of a picture according to a rapid load change due to a beam current by detecting the change of a video signal, and controlling the feed of a high voltage control forward. CONSTITUTION:The primary color signals of R, G, B from video signal input terminals 12-14 are added in an addition circuit 15. This added output is supplied to a video signal change detecting circuit 17. A transistor TR 18 is controlled by this detecting signal 17 and the output voltage 19 of the TR 18 is added to a reference voltage 9. A voltage comparator 10, at the time of generating a difference between a voltage obtained by adding the output voltage 19 to the reference voltage 9 and a detected voltage 8, generates a difference voltage 11. The high voltage control circuit 1 is controlled by this difference voltage 11 to constantly maintain a high output voltage. Thereby, the fluctuation of the high output voltage generated according to the rapid change of the beam current due to the rapid change of the video signal can be corrected. Accordingly, the distortion of the picture can be suppressed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23496687A JPS6478579A (en) | 1987-09-21 | 1987-09-21 | High voltage control circuit for cathode ray tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23496687A JPS6478579A (en) | 1987-09-21 | 1987-09-21 | High voltage control circuit for cathode ray tube |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6478579A true JPS6478579A (en) | 1989-03-24 |
Family
ID=16979041
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23496687A Pending JPS6478579A (en) | 1987-09-21 | 1987-09-21 | High voltage control circuit for cathode ray tube |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6478579A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4240984B4 (en) * | 1991-12-16 | 2005-08-18 | Thomson Consumer Electronics, Inc., Indianapolis | Control circuit and power supply for televisions |
-
1987
- 1987-09-21 JP JP23496687A patent/JPS6478579A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4240984B4 (en) * | 1991-12-16 | 2005-08-18 | Thomson Consumer Electronics, Inc., Indianapolis | Control circuit and power supply for televisions |
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