JPH0469973U - - Google Patents
Info
- Publication number
- JPH0469973U JPH0469973U JP11160490U JP11160490U JPH0469973U JP H0469973 U JPH0469973 U JP H0469973U JP 11160490 U JP11160490 U JP 11160490U JP 11160490 U JP11160490 U JP 11160490U JP H0469973 U JPH0469973 U JP H0469973U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- ray tube
- cathode ray
- relay
- driving
- 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)
Description
第１図は本考案による陰極線管保護回路の一実
施例を示す回路図、第２図乃至第６図は第１図の
陰極線管保護回路の動作を説明するための波形図
であり、第２図は偏向ヨークに加わる正常動作時
のパラボラ電圧波形を示す図、第３図は直流カツ
ト用コンデンサを通過したあとのパラボラ電圧波
形を示す図、第４図は画面が横一本のラスタとな
つたときの偏向ヨークに加わる電圧波形を示す図
、第５図は偏向ヨークに加わる直流電源電圧に近
い電圧波形を示す図、第６図は偏向ヨークに加わ
るグランドレベルに近い電圧波形を示す図、第７
図は従来の陰極線管保護回路を示す回路図である
。
２……ポンプアツプ回路、３，４……垂直出力
トランジスタ、８……垂直偏向ヨーク、９……カ
ツプリングコンデンサ、１１……直流カツト用の
コンデンサ、１３……動作波形検出用のトランジ
スタ、１６，１７……積分回路を構成する抵抗と
コンデンサ、１８，２８，３６……スイツチング
用のトランジスタ、２０，３７……反転用のトラ
ンジスタ、２１……サイリスタ、２３，２４……
遅延動作用の抵抗とコンデンサ、２９……リレー
ドライブ用のトランジスタ、３０……電源オン・
オフ用のリレー、３１……リレーコイル、３２…
…リレー接点、３３，３４……直流電源Ｖｃｃを
検出する分圧用抵抗。
FIG. 1 is a circuit diagram showing one embodiment of the cathode ray tube protection circuit according to the present invention, and FIGS. 2 to 6 are waveform diagrams for explaining the operation of the cathode ray tube protection circuit of FIG. The figure shows the parabolic voltage waveform applied to the deflection yoke during normal operation, Figure 3 shows the parabolic voltage waveform after passing through the DC cut capacitor, and Figure 4 shows the screen as a single horizontal raster. Figure 5 is a diagram showing a voltage waveform applied to the deflection yoke close to the DC power supply voltage, Figure 6 is a diagram showing a voltage waveform applied to the deflection yoke close to the ground level, 7th
The figure is a circuit diagram showing a conventional cathode ray tube protection circuit. 2... Pump up circuit, 3, 4... Vertical output transistor, 8... Vertical deflection yoke, 9... Coupling capacitor, 11... Capacitor for direct current cut, 13... Transistor for detecting operating waveform, 16, 17... Resistor and capacitor forming an integrating circuit, 18, 28, 36... Transistor for switching, 20, 37... Transistor for inversion, 21... Thyristor, 23, 24...
Resistor and capacitor for delay operation, 29...Transistor for relay drive, 30...Power on/off
Off relay, 31... Relay coil, 32...
...Relay contact, 33, 34... Voltage dividing resistor for detecting DC power supply Vcc.
Claims (1)
イルに加わる動作電圧波形を直流カツト用コンデ
ンサを介して検出する動作波形検出用トランジス
タと、 陰極線管駆動用電源をオン・オフするリレーを
駆動するためのリレードライブ用トランジスタと
、 上記動作波形検出用トランジスタの検出出力に
基づいてこのリレードライブ用トランジスタをオ
ン・オフ制御するスイツチング制御手段とを備え
ることを特徴とする陰極線管保護回路。[Claims for Utility Model Registration] An operating waveform detection transistor that detects the operating voltage waveform applied to a vertical deflection coil connected to a vertical output transistor via a DC cut capacitor, and a transistor that turns on and off the power supply for driving a cathode ray tube. A cathode ray tube protection circuit comprising: a relay drive transistor for driving a relay; and switching control means for controlling on/off the relay drive transistor based on the detection output of the operation waveform detection transistor. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11160490U JPH0469973U (en) | 1990-10-26 | 1990-10-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11160490U JPH0469973U (en) | 1990-10-26 | 1990-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0469973U true JPH0469973U (en) | 1992-06-22 |
Family
ID=31859072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11160490U Pending JPH0469973U (en) | 1990-10-26 | 1990-10-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0469973U (en) |
-
1990
- 1990-10-26 JP JP11160490U patent/JPH0469973U/ja active Pending
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