JPH0427676U - - Google Patents
Info
- Publication number
- JPH0427676U JPH0427676U JP6811890U JP6811890U JPH0427676U JP H0427676 U JPH0427676 U JP H0427676U JP 6811890 U JP6811890 U JP 6811890U JP 6811890 U JP6811890 U JP 6811890U JP H0427676 U JPH0427676 U JP H0427676U
- Authority
- JP
- Japan
- Prior art keywords
- scanning speed
- speed modulation
- modulation circuit
- circuit
- screen
- 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
- 238000010894 electron beam technology Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Details Of Television Scanning (AREA)
Description
第１図はこの考案の走査速度変調回路の第１の
実施例のブロツク図、第２図は第２の実施例のブ
ロツク図、第３図は走査速度変調回路の動作原理
を示す波形図、第４図は従来の走査速度変調回路
のブロツク図である。
１……映像信号、２……二次微分器、３……輪
郭成分、４……ドライブ段、５……クリツプ回路
、６……出力段、７……走査速度変調コイル、８
……輪郭補正信号電流、９……振幅検知器。
FIG. 1 is a block diagram of the first embodiment of the scanning speed modulation circuit of this invention, FIG. 2 is a block diagram of the second embodiment, and FIG. 3 is a waveform diagram showing the operating principle of the scanning speed modulation circuit. FIG. 4 is a block diagram of a conventional scanning speed modulation circuit. DESCRIPTION OF SYMBOLS 1...Video signal, 2...Secondary differentiator, 3...Contour component, 4...Drive stage, 5...Clip circuit, 6...Output stage, 7...Scanning speed modulation coil, 8
...Contour correction signal current, 9...Amplitude detector.
Claims (1)
線管ネツク部に設けた走査速度変調コイルに加え
ることによつて電子ビームの走査速度を変調する
回路において、 映像信号の振幅を検知して画面の暗部には走査
速度変調回路を停止し、画面の明るい部分に対し
てのみ走査速度変調を行うように走査速度変調回
路内の増幅部を制御する振幅検知器を備えたこと
を特徴とする走査速度変調回路。[Claim for Utility Model Registration] In a circuit that modulates the scanning speed of an electron beam by applying a differential signal component extracted from a video signal to a scanning speed modulation coil provided in a cathode ray tube network, The device is equipped with an amplitude detector that detects this and controls the amplifier section in the scanning speed modulation circuit to stop the scanning speed modulation circuit for dark areas of the screen and perform scanning speed modulation only for bright areas of the screen. A scanning speed modulation circuit featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6811890U JPH0427676U (en) | 1990-06-27 | 1990-06-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6811890U JPH0427676U (en) | 1990-06-27 | 1990-06-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0427676U true JPH0427676U (en) | 1992-03-05 |
Family
ID=31602283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6811890U Pending JPH0427676U (en) | 1990-06-27 | 1990-06-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0427676U (en) |
-
1990
- 1990-06-27 JP JP6811890U patent/JPH0427676U/ja active Pending
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