JPH0279673U - - Google Patents
Info
- Publication number
- JPH0279673U JPH0279673U JP1988159532U JP15953288U JPH0279673U JP H0279673 U JPH0279673 U JP H0279673U JP 1988159532 U JP1988159532 U JP 1988159532U JP 15953288 U JP15953288 U JP 15953288U JP H0279673 U JPH0279673 U JP H0279673U
- Authority
- JP
- Japan
- Prior art keywords
- video signal
- external
- electromagnetic relay
- display device
- switching circuit
- 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
- 238000011084 recovery Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Description
第１図は本考案の一実施例の構成図、第２図は
本考案の他の実施例の構成図、第３図は従来例の
構成図である。
１，５……ＴＶチユーナ機器における映像信号
切換回路、２，６，８……電磁リレー、３，４，
９……トランジスタ。
FIG. 1 is a block diagram of one embodiment of the present invention, FIG. 2 is a block diagram of another embodiment of the present invention, and FIG. 3 is a block diagram of a conventional example. 1, 5... Video signal switching circuit in TV tuner equipment, 2, 6, 8... Electromagnetic relay, 3, 4,
9...Transistor.
Claims (1)
ジヨン電波を受信復調して得られたＴＶ映像信号
を択一的に切換えて外部デイスプレイ装置に出力
するＴＶチユーナ機器における映像信号切換回路
において、 前記外部映像信号が与えられるメイク接点、前
記ＴＶ映像信号が与えられるブレーク接点および
前記外部デイスプレイ装置に接続された切換接点
を有する電磁リレーと、 前記ＴＶチユーナ機器の電源がオフされている
ときに、前記電磁リレーのコイルに駆動電流を供
給する手段とを備えることを特徴とするＴＶチユ
ーナ機器における映像信号切換回路。 (2) 外部機器からの外部映像信号またはテレビ
ジヨン電波を受信復調して得られたＴＶ映像信号
を択一的に切換えて外部デイスプレイ装置に出力
するＴＶチユーナ機器における映像信号切換回路
において、 前記外部映像信号が与えられるブレーク接点、
前記ＴＶ映像信号が与えられるメイク接点および
前記外部デイスプレイ装置に接続された切換接点
を有する電磁リレーを備え、 前記ＴＶチユーナ機器の電源がオフされている
ときには、前記電磁リレーの復旧動作により、前
記外部映像信号を前記外部デイスプレイ装置に出
力することを特徴とするＴＶチユーナ機器におけ
る映像信号切換回路。[Scope of Claim for Utility Model Registration] (1) In a TV tuner device that selectively switches and outputs an external video signal from an external device or a TV video signal obtained by receiving and demodulating television radio waves to an external display device. The video signal switching circuit includes: an electromagnetic relay having a make contact to which the external video signal is applied, a break contact to which the TV video signal is applied, and a switching contact connected to the external display device; and a power supply to the TV tuner device is turned off. A video signal switching circuit for a TV tuner device, comprising means for supplying a drive current to the coil of the electromagnetic relay when the electromagnetic relay is being operated. (2) In a video signal switching circuit in a TV tuner device that selectively switches an external video signal from an external device or a TV video signal obtained by receiving and demodulating television radio waves and outputs the same to an external display device, a break contact to which a video signal is applied;
an electromagnetic relay having a make contact to which the TV video signal is applied and a switching contact connected to the external display device; when the TV tuner device is powered off, a recovery operation of the electromagnetic relay causes the external A video signal switching circuit in a TV tuner device, characterized in that the video signal is output to the external display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988159532U JPH0279673U (en) | 1988-12-07 | 1988-12-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988159532U JPH0279673U (en) | 1988-12-07 | 1988-12-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0279673U true JPH0279673U (en) | 1990-06-19 |
Family
ID=31440828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988159532U Pending JPH0279673U (en) | 1988-12-07 | 1988-12-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0279673U (en) |
-
1988
- 1988-12-07 JP JP1988159532U patent/JPH0279673U/ja active Pending
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