JPH02113482U - - Google Patents
Info
- Publication number
- JPH02113482U JPH02113482U JP2286089U JP2286089U JPH02113482U JP H02113482 U JPH02113482 U JP H02113482U JP 2286089 U JP2286089 U JP 2286089U JP 2286089 U JP2286089 U JP 2286089U JP H02113482 U JPH02113482 U JP H02113482U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- degaussing
- ray tube
- cathode ray
- detects
- 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
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Description
第１図は本考案の一実施例の構成図、第２図は
消磁コイルの取付状態を示す図、第３図は従来例
の回路図である。
１……ＣＲＴ、２……消磁コイル、１７……信
号検出回路、１９……正極性サーミスタ、２０…
…リレー、２１……開閉器、２５……トランジス
タ。
FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a diagram showing how a degaussing coil is attached, and FIG. 3 is a circuit diagram of a conventional example. 1...CRT, 2...Degaussing coil, 17...Signal detection circuit, 19...Positive polarity thermistor, 20...
...Relay, 21...Switch, 25...Transistor.
Claims (1)
正極性サーミスタと開閉器とを商用電源に対して
直列に接続する消磁回路において、上記陰極線管
への映像信号の有無を検出する信号検出回路と、
電源を投入したとき、及び上記信号検出回路で映
像信号が無くなつたことを検出したとき、上記開
閉器を夫々所望時間閉成する制御回路を設けたこ
とを特徴とする自動消磁回路。 A signal detection circuit that detects the presence or absence of a video signal to the cathode ray tube in a degaussing circuit that connects a degaussing coil wound around the funnel portion of the cathode ray tube, a positive thermistor, and a switch in series to a commercial power supply;
An automatic degaussing circuit comprising a control circuit that closes each of the switches for a desired time when the power is turned on and when the signal detection circuit detects that no video signal is present.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2286089U JPH02113482U (en) | 1989-02-28 | 1989-02-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2286089U JPH02113482U (en) | 1989-02-28 | 1989-02-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02113482U true JPH02113482U (en) | 1990-09-11 |
Family
ID=31241352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2286089U Pending JPH02113482U (en) | 1989-02-28 | 1989-02-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02113482U (en) |
-
1989
- 1989-02-28 JP JP2286089U patent/JPH02113482U/ja active Pending