JP3595896B2

JP3595896B2 - TV door phone equipment

Info

Publication number: JP3595896B2
Application number: JP35447496A
Authority: JP
Inventors: 敦志野村; 泰生藤村; 出石塚; 雅子細矢; 裕一茅野
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 1996-12-19
Filing date: 1996-12-19
Publication date: 2004-12-02
Anticipated expiration: 2016-12-19
Also published as: JPH10178635A

Description

【０００１】
【発明の属する技術分野】
本発明は、映像表示する機能を持つインターホンのカメラ付き玄関子機への供給電源と、室内モニタ親機のモニタへの電源の制御を行うテレビドアホン装置に関するものである。
【０００２】
【従来の技術】
従来、カメラなし玄関子機をモニタ親機へ接続する場合は、室内モニタ親機に子機のカメラの有無を設定するスイッチを設け、このスイッチの切り替えによって、カメラ付き玄関子機への供給電源と、モニタ親機の映像表示手段の電源の制御を行っていた。
【０００３】
また、公開特平８−１５４１３２号に示すように、玄関子機と親機との間に玄関子機接続アダプタを設けて、玄関子機のカメラの有無を自動検出するようにしていた。
【０００４】
【発明が解決しようとする課題】
しかしながら、このような従来の方式では、カメラの有無を設定するスイッチの設定を誤ると、カメラなし玄関子機が接続されているのに室内モニタ親機の映像表示手段に電源が供給されてノイズが表示されてしまったり、逆にカメラ付き玄関子機が接続されていても映像が表示されないという問題があった。
【０００５】
更に、インターホンとは無関係の機器を誤って玄関子機として接続した場合には、設定スイッチをカメラ有りで設定してしまうと、接続された機器へ電源が供給されてしまい、機器を破壊するおそれがあった。また、公開特平−１５４１３２号に示すように玄関子機接続アダプタを設ける方法では、コストが高くなってしまう。
【０００６】
本発明は上記の問題を解決するものであり、室内モニタ親機に接続された玄関子機がカメラ付き玄関子機か否かを自動的に判定し、かつカメラ付き玄関子機以外の玄関子機が接続された時は該玄関子機への給電とモニタへの給電を自動的に切断してコストの低減を可能にしたテレビドアホン装置を提供することを目的とする。
【０００７】
【課題を解決するための手段】
この課題を解決するために本発明は、カメラ付き玄関子機及びカメラなし玄関子機の少なくとも一方が接続される室内モニタ親機を有するテレビドアホン装置において、前記室内モニタ親機は、前記カメラ付き玄関子機で撮影された映像を表示するモニタと、前記カメラ付き玄関子機またはカメラなし玄関子機からの着信信号及び室内側からのカメラ付き玄関子機の監視指示信号に対応する制御信号を出力する制御手段と、前記カメラ付き玄関子機からの信号が映像信号として正常か異常かを判定して判定結果を前記制御手段に通知する映像入力判定手段と、前記制御手段からの制御信号により前記モニタに電力を供給するモニタ給電手段と、前記制御手段からの制御信号により前記カメラ付き玄関子機を前記モニタに切り替え接続するカメラ切り替え手段と、前記制御手段からの制御信号により前記モニタに切り替え接続された前記カメラ付き玄関子機に電力を供給するカメラ給電手段と、前記制御手段からの制御信号により前記カメラ付き玄関子機またはカメラなし玄関子機からの信号を切り替えて前記映像入力判定手段に入力するドアホン切り替え手段とを備え、前記映像入力判定手段が入力された信号を映像信号として異常と判定した時は前記制御手段が前記モニタ給電手段及び前記カメラ給電手段を制御して前記モニタ及び前記カメラ付き玄関子機への給電を停止することを特徴とするものである。
【０００８】
これにより、室内モニタ親機に接続された玄関子機がカメラ付き玄関子機か否かを自動的に判定できるとともに、かつカメラ付き玄関子機以外の玄関子機が接続された時は該玄関子機への給電とモニタへの給電を自動的に切断することができる。
【０００９】
【発明の実施の形態】
本発明の請求項１に記載の発明は、カメラ付き玄関子機及びカメラなし玄関子機の少なくとも一方が接続される室内モニタ親機を有するテレビドアホン装置であって、前記室内モニタ親機は、前記カメラ付き玄関子機で撮影された映像を表示するモニタと、前記カメラ付き玄関子機またはカメラなし玄関子機からの着信信号及び室内側からのカメラ付き玄関子機の監視指示信号に対応する制御信号を出力する制御手段と、前記カメラ付き玄関子機からの信号が映像信号として正常か異常かを判定して判定結果を前記制御手段に通知する映像入力判定手段と、前記制御手段からの制御信号により前記モニタに電力を供給するモニタ給電手段と、前記制御手段からの制御信号により前記カメラ付き玄関子機を前記モニタに切り替え接続するカメラ切り替え手段と、前記制御手段からの制御信号により前記モニタに切り替え接続された前記カメラ付き玄関子機に電力を供給するカメラ給電手段と、前記制御手段からの制御信号により前記カメラ付き玄関子機またはカメラなし玄関子機からの信号を切り替えて前記映像入力判定手段に入力するドアホン切り替え手段とを備え、前記映像入力判定手段が入力された信号を映像信号として異常と判定した時は前記制御手段が前記モニタ給電手段及び前記カメラ給電手段を制御して前記モニタ及び前記カメラ付き玄関子機への給電を停止することを特徴とするものである。
【００１１】
これにより、室内モニタ親機に、カメラ付き玄関子機が接続されていない場合に、玄関子機からの信号を映像入力判定手段で受信することにより、カメラ付き玄関子機が接続されていないことを接続機器の設定スイッチなどを設けることなく自動的に判定し、制御手段がカメラ給電手段を制御してカメラ付き玄関子機への供給電源を切断することで、不要な電源の供給停止を自動で行うことができ、カメラ付き玄関子機として他の機器を誤って接続した場合でも、接続された機器が過剰な電源供給によって破壊されることを防止することができる。更に、カメラ付き玄関子機が接続されていないことを判定した場合に、カメラ付き玄関子機のための電源切断と共に、制御手段が室内モニタ親機のモニタ給電手段を制御してモニタへの供給電源を切断し、室内モニタ親機のモニタにノイズが表示されることを防止することができる。また、カメラなし玄関子機が接続されている場合に、室内側から玄関を監視する指示を制御手段が受けると、カメラ付き玄関子機のための電源とモニタの電源を供給し、ドアホン切り替え手段を制御してカメラ付き玄関子機へ一旦接続をするが、カメラ付き玄関子機が接続されていないことを接続機器の設定スイッチなどを設けることなく自動的に判定し、制御手段がカメラ給電手段とモニタ給電手段を制御してカメラ付き玄関子機への供給電源とモニタへの供給電源を切断するとともにドアホン切り替え手段を制御してカメラなし玄関子機へ接続することができる。
【００１２】
本発明の請求項２に記載の発明は、カメラ付き玄関子機及びカメラなし玄関子機の少なくとも一方が接続される室内モニタ親機を有するテレビドアホン装置であって、前記室内モニタ親機は、前記カメラ付き玄関子機で撮影された映像を表示するモニタと、着信の行われた前記カメラ付き玄関子機の映像信号から同期信号のドロップアウトを検出するドロップアウト検出手段と、前記カメラ付き玄関子機またはカメラなし玄関子機からの着信信号及び室内側からのカメラ付き玄関子機の監視指示信号に対応する制御信号を出力するとともに前記ドロップアウト検出手段からの同期信号の一定時間内のカウント値を基に、映像信号が正常状態、着信中の玄関子機からの再着信の状態及び映像信号が異常状態を判定する判定制御手段と、前記判定制御手段からの制御信号により前記モニタに電力を供給するモニタ給電手段と、前記判定制御手段からの制御信号により前記カメラ付き玄関子機を前記モニタに切り替え接続するカメラ切り替え手段と、前記判定制御手段からの制御信号により前記モニタに切り替え接続された前記カメラ付き玄関子機に電力を供給するカメラ給電手段と、前記判定制御手段からの制御信号により前記カメラ付き玄関子機またはカメラなし玄関子機からの信号を切り替えて前記ドロップアウト検出手段に入力するドアホン切り替え手段とを備え、前記判定制御手段は、同期信号の一定時間内のカウント値から映像信号が異常状態と判定した時に、前記モニタ給電手段及び前記カメラ給電手段を制御して前記モニタ及び前記カメラ付き玄関子機への給電を停止するようにしたものであり、室内モニタ親機に、カメラ付き玄関子機が接続されていない場合に、玄関子機からの信号をドロップアウト検出手段で受信し、判定制御手段がドロップアウト検出手段から入力される同期信号の一定時間内のカウント値を基に閾値と比較し、映像信号が異常状態と判定し、カメラ給電手段を制御してカメラ付き玄関子機への供給電源を切断することで、カメラなし玄関子機が接続されている場合の不要な電源の供給停止を自動で行うことができ、玄関子機として他の機器を誤って接続した場合でも、接続された機器が過剰な電源供給によって破壊されることを防止できる。更に、映像信号が異常状態と判定した場合に、カメラ付き玄関子機のための電源切断と共に、判定制御手段が室内モニタ親機のモニタ給電手段を制御してモニタへの供給電源を切断し、室内モニタ親機のモニタにノイズが表示されることを防止することができる。また、カメラなし玄関子機が接続されている場合に、室内側から玄関を監視する指示を判定制御手段が受けると、カメラ付き玄関子機のための電源とモニタの電源を供給し、ドアホン切り替え手段を制御してカメラ付き玄関子機が接続されているものとして一旦接続するが、カメラ付き玄関子機が接続されていないことを接続機器の設定スイッチなどを設けることなく自動的に判定し、判定制御手段がカメラ給電手段とモニタ給電手段を制御して接続されているカメラなし玄関子機への供給電源とモニタへの供給電源を切断するとともにドアホン切り替え手段を制御してカメラなし玄関子機へ接続することができる。
【００１３】
以下、本発明の実施の形態について図１から図３を用いて説明する。
【００１４】
（実施に形態１）
図１は、本発明の実施の形態１におけるカメラドアホン装置の構成を示すブロック図である。図１において、室内モニタ親機１２の子機接続端子１２１〜１２３のいずれか１つには、第１カメラ付き玄関子機１と、第２カメラ付き玄関子機２またはカメラなし玄関子機３のいずれか一台が接続されている。
【００１５】
室内モニタ親機１２は、第１カメラ付き玄関子機１または第２カメラ付き玄関子機２のカメラ１１１または２１１で撮影された映像を表示するモニタ４、このモニタ４に電力を供給するモニタ給電手段５、第１カメラ付き玄関子機１と第２カメラ付き玄関子機２またはカメラなし玄関子機３からの着信信号や室内からの第１カメラ付き玄関子機１または第２カメラ付き玄関子機２の監視指示信号及び後述する映像入力判定手段１０からの判定信号を受信して給電部及び各切替部を制御する制御手段６、制御手段６からの制御信号により第１カメラ付き玄関子機１または第２カメラ付き玄関子機２の接続された子機接続端子１２１及び１２２のいずれかをモニタ４に切り替え接続するカメラ切り替え手段７、制御手段６により制御され、子機接続端子１２１または１２２に接続された第１カメラ付き玄関子機１または第２カメラ付き玄関子機２に電力を供給するカメラ給電手段８、制御手段６からの制御信号によりカメラ切り替え手段７または子機接続端子１２３に切り替え接続するドアホン切り替え手段９、カメラ切り替え手段７及びドアホン切り替え手段９またはドアホン切り替え手段９を介して玄関子機からの映像信号の有無または異常を判定する映像入力判定手段１０を備えている。
【００１６】
この構成において、第１カメラ付き玄関子機１が呼び出しを行うと、制御手段６に第１カメラ付き玄関子機１の着信信号が入力され、その信号を受信した制御手段６はカメラ切り替え手段７を（ａ）側に切り替え、ドアホン切り替え手段９を（ｃ）側に切り替える。また、カメラ給電手段８を制御して第１カメラ付き玄関子機１へ電力を供給し、更にモニタ給電手段５を制御してモニタ４へ電力を供給する。
【００１７】
第１カメラ付き玄関子機１からの映像信号はカメラ切り替え手段７とドアホン切り替え手段９を経て映像入力判定手段１０に入力される。映像信号の入力が正常であった場合は、映像入力判定手段１０から制御手段６に映像信号の入力が異常であることの通知は行われない。映像信号の入力が異常である通知を受けなかった制御手段６は、モニタ給電手段５とカメラ給電手段８を制御しないので、モニタ４と第１カメラ付き玄関子機１への電力供給は継続される。またモニタ４には、第１カメラ付き玄関子機１からの映像信号がカメラ切り替え手段７を経て入力されているので、モニタ給電手段５から電力が供給されることにより、第１カメラ付き玄関子機１からの映像が表示される。
【００１８】
室内モニタ親機１２に第２カメラ付き玄関子機２が接続されている場合に、第２カメラ付き玄関子機２が呼び出しを行うと、制御手段６に第２カメラ付き玄関子機２の着信信号が入力され、その信号を受信した制御手段６はカメラ切り替え手段７を（ｂ）側に切り替え、ドアホン切り替え手段９を（ｃ）側に切り替える。また、カメラ給電手段８を制御して第２カメラ付き玄関子機２へ電力を供給し、モニタ給電手段５を制御してモニタ４へ電力を供給する。
【００１９】
第２カメラ付き玄関子機２からの映像信号はカメラ切り替え手段７とドアホン切り替え手段９を経て映像入力判定手段１０に入力される。映像信号の入力が正常であった場合は、映像入力判定手段１０から制御手段６に映像信号の入力が異常であることの通知は行われない。映像信号の入力が異常である通知を受けなかった制御手段６は、モニタ給電手段５とカメラ給電手段８を制御しないので、モニタ４と第１カメラ付き玄関子機１への電力供給は継続される。モニタ４には、第２カメラ付き玄関子機２からの映像信号がカメラ切り替え手段７を経て入力されているので、モニタ給電手段５から電力が供給されることにより、第２カメラ付き玄関子機２からの映像が表示される。
【００２０】
室内モニタ親機１２にカメラなし玄関子機３が接続されている場合に、カメラなし玄関子機３が呼び出しを行うと、制御手段６にカメラなし玄関子機３の着信信号が入力され、その信号を受信した制御手段６はカメラ切り替え手段７を（ａ）側に切り替え、ドアホン切り替え手段９を（ｄ）側に切り替える。また、カメラ給電手段８を制御してカメラなし玄関子機３への電力の供給を停止し、かつモニタ給電手段５を制御してモニタ４への電力の供給を停止する。
【００２１】
室内モニタ親機１２の第２カメラ付き玄関子機２が接続されるべき箇所に、誤ってカメラなし玄関子機を接続し、このカメラなし玄関子機から呼び出しを行うと、制御手段６にカメラ付き玄関子機２の着信信号が入力され、その信号を受信した制御手段６はカメラ切り替え手段７を（ｂ）側に切り替え、ドアホン切り替え手段９を（ｃ）側に切り替える。そして、カメラ給電手段８を制御して接続された玄関子機へ電力を供給し、モニタ給電手段５を制御してモニタ４へ電力を供給するが、映像入力判定手段１０に映像信号は入力されない。
【００２２】
従って、映像入力判定手段１０では映像信号の入力がないことを判定すると、映像入力判定手段１０から制御手段６に映像信号の入力が異常であることを通知する。映像信号の入力が異常である通知を受けた制御手段６では、カメラ給電手段８を制御して電力の供給を停止することで、誤って接続されたカメラなし玄関子機に過剰な電力が供給されることを防止し、かつモニタ給電手段５を制御して電力の供給を停止することでモニタ４にノイズが表示されてしまうことを防止する。
【００２３】
同様に、室内モニタ親機１２の第１カメラ付き玄関子機１が接続されるべき箇所に、誤ってカメラなし玄関子機を接続し、このカメラなし玄関子機から呼び出しを行った場合も、制御手段６は、カメラ給電手段８を制御して電力の供給を停止することで、誤って接続されたカメラなし玄関子機に過剰な電力が供給されることを防止し、モニタ給電手段５を制御して電力の供給を停止することでモニタ４にノイズが表示されてしまうことを防止する。
【００２４】
一方、制御手段６に室内側から玄関子機１により玄関を監視する指示が入力されると、制御手段６はカメラ切り替え手段７を（ａ）側に切り替え、ドアホン切り替え手段９を（ｃ）側に切り替える。そして、カメラ給電手段８を制御して第１カメラ付き玄関子機１へ電力を供給し、モニタ給電手段５を制御してモニタ４へ電力を供給する。
【００２５】
第１カメラ付き玄関子機１からの映像信号はカメラ切り替え手段７とドアホン切り替え手段９を経て映像入力判定手段１０に入力される。映像信号の入力が正常であった場合は、映像入力判定手段１０から制御手段６に映像信号の入力が異常であることの通知は行われない。映像信号の入力が異常である通知を受けなかった制御手段６は、モニタ給電手段５とカメラ給電手段８を制御しないので、モニタ４と第１カメラ付き玄関子機１への電力供給は継続される。モニタ４には、第１カメラ付き玄関子機１からの映像信号がカメラ切り替え手段７を経て入力されているので、モニタ給電手段５から電力が供給されることにより、第１カメラ付き玄関子機１からの映像が表示される。
【００２６】
室内モニタ親機１２に第２カメラ付き玄関子機２が接続されている場合に、制御手段６に、室内側から玄関子機２により玄関を監視する指示が入力されると、制御手段６はカメラ切り替え手段７を（ｂ）側に切り替え、ドアホン切り替え手段９を（ｃ）側に切り替える。そして、カメラ給電手段８を制御して第２カメラ付き玄関子機２へ電力を供給し、モニタ給電手段５を制御してモニタ４へ電力を供給する。
【００２７】
第２カメラ付き玄関子機２からの映像信号はカメラ切り替え手段７とドアホン切り替え手段９を経て映像入力判定手段１０に入力される。映像信号の入力が正常であった場合は、映像入力判定手段１０から制御手段６に映像信号の入力が異常であることの通知は行われない。映像信号の入力が異常である通知を受けなかった制御手段６は、モニタ給電手段５とカメラ給電手段８を制御しないので、モニタ４と第１カメラ付き玄関子機１への電力供給は継続される。モニタ４には、第２カメラ付き玄関子機２からの映像信号がカメラ切り替え手段７を経て入力されているので、モニタ給電手段５から電力が供給されることにより、第２カメラ付き玄関子機２からの映像が表示される。
【００２８】
室内モニタ親機１２にカメラなし玄関子機３が接続されている場合に、制御手段６に、室内側から玄関子機２により玄関を監視する指示が入力されると、制御手段６はカメラ切り替え手段７を（ｂ）側に切り替え、ドアホン切り替え手段９を（ｃ）側に切り替える。そして、カメラ給電手段８を制御して第２カメラ付き玄関子機２へ電力を供給し、モニタ給電手段５を制御してモニタ４へ電力を供給するが、映像入力判定手段１０に映像信号は入力されない。
【００２９】
従って、映像入力判定手段１０では映像信号の入力がないことを判定すると、映像入力判定手段１０から制御手段６に映像信号の入力が異常であることを通知する。映像信号の入力が異常である通知を受けた制御手段６では、ドアホン切り替え手段９を（ｄ）側に切り替えることでカメラなし玄関子機３と接続することができ、カメラ給電手段８を制御して電力の供給を停止することで、カメラなし玄関子機３に過剰な電力が供給されることを防止し、更にモニタ給電手段５を制御して電力の供給を停止することでモニタ４にノイズが表示されてしまうことを防止する。
【００３０】
（実施の形態２）
図２は、本発明の実施の形態２におけるカメラドアホン装置の構成を示すブロック図である。図１において、室内モニタ親機２３の子機接続端子２３１〜２３３のいずれか１つには、第１カメラ付き玄関子機１３と、第２カメラ付き玄関子機１４またはカメラなし玄関子機１５のいずれか一台が接続されている。
【００３１】
室内モニタ親機２３は、第１カメラ付き玄関子機１３または第２カメラ付き玄関子機１４のカメラ１３１または１４１で撮像された映像を表示するモニタ１６、このモニタ１６に電力を供給するモニタ給電手段１７、第１カメラ付き玄関子機１３と第２カメラ付き玄関子機１４またはカメラなし玄関子機１５からの着信信号や室内からの第１カメラ付き玄関子機１３または第２カメラ付き玄関子機１４の監視指示信号及び後述するドロップアウト検出手段２２からの検出信号を受信して給電部及び各切替部を制御する判定制御手段１８、判定制御手段１８からの制御信号により第１カメラ付き玄関子機１３または第２カメラ付き玄関子機１４の接続された子機接続端子２３１及び２３２のいずれかをモニタ１６に切り替え接続するカメラ切り替え手段１９、判定制御手段１８により制御され、子機接続端子２３１または２３２に接続された第１カメラ付き玄関子機１３または第２カメラ付き玄関子機１４に電力を供給するカメラ給電手段２０、判定制御手段１８からの制御信号によりカメラ切り替え手段１９または子機接続端子２３３に切り替え接続するドアホン切り替え手段２１、カメラ切り替え手段１９及びドアホン切り替え手段２１またはドアホン切り替え手段２１を介して第１カメラ付き玄関子機１３と、ドアホン切り替え手段２１を介してカメラ切り替え手段１９及びカメラなし玄関子機１５にの切り替え接続され、着信の行われたカメラ付き玄関子機の映像信号から同期信号のドロップアウトを検出するドロップアウト検出手段２２を備えている。
【００３２】
ドロップアウト検出手段２２は、着信が行われた玄関子機からの再着信があった場合に同期信号監視時間内にα回以上β回未満の同期信号を出力し、カメラ付き玄関子機からの映像信号が異常であった場合には同期信号監視時間内にβ回以上の同期信号を出力する。そして、判定制御手段１８は、ドロップアウト検出手段２２から入力される同期信号の一定時間内のカウント閾値から、映像信号のない状態、着信中の玄関子機からの再着信の状態及びカメラ付き玄関子機が接続されていない状態を判定する。
【００３３】
図３は、同期信号監視時間経過時の判定制御手段１８の動作手順を示すフローチャートである。
【００３４】
このように構成された本実施の形態２の動作について、図３を参照して説明する。第１カメラ付き玄関子機１３が呼び出しを行うと、判定制御手段１８にカメラ付き玄関子機１３の着信信号が入力され、その信号を受信した判定制御手段１８はカメラ切り替え手段１９を（ｅ）側に切り替え、ドアホン切り替え手段２１を（ｇ）側に切り替える。そして、カメラ給電手段２０を制御して第１カメラ付き玄関子機１３へ電力を供給し、モニタ給電手段１７を制御してモニタ１６へ電力を供給する。
【００３５】
第１カメラ付き玄関子機１３からの映像信号はカメラ切り替え手段１９とドアホン切り替え手段２１を経てドロップアウト検出手段に入力される。映像信号の入力が正常であった場合は、ドロップアウト検出手段２２から判定制御手段１８に同期信号監視時間内にβ回以上の同期信号の入力は行われない。同期信号監視時間内にβ回以上の同期信号の入力を受けなかった判定制御手段１８は、モニタ給電手段１７とカメラ給電手段２０を制御しないので、モニタ１６と第１カメラ付き玄関子機１３への電力供給は継続される。モニタ１６には、第１カメラ付き玄関子機１３からの映像信号がカメラ切り替え手段１９を経て入力されているので、モニタ給電手段１７から電力が供給されることにより、第１カメラ付き玄関子機１３からの映像が表示される。
【００３６】
続いて、第１カメラ付き玄関子機１３が再度呼び出しを行うと、判定制御手段１８にはカメラ付き玄関子機１３の着信信号は入力されず、ドロップアウト検出手段２２から判定制御手段１８に同期信号監視時間内にα回以上β回未満の同期信号の入力が行われる。これにより、判定制御手段１８では、同期信号監視時間内にドロップアウト検出手段２２から同期信号の入力がα回以上（ステップＳ１）、β回以上かを判定し（ステップＳ２）、α回以上β回未満の同期信号の入力を判定した判定制御手段１８では、着信中である第１カメラ付き玄関子機１３から再度呼び出しが行われたことを判定し、ステップＳ６でドアホン切り替え手段２１は（ｈ）側でないことを判定した後、カメラ切り替え手段１９を（ｅ）側のまま保持し、かつドアホン切り替え手段２１を（ｇ）側のまま保持して、モニタ１６への給電を継続し（ステップＳ７）、第１カメラ付き玄関子機１３への給電を継続し（ステップＳ８）、カメラ付き玄関子機１３の着信中の状態を保持する。
【００３７】
室内モニタ親機２３に第２カメラ付き玄関子機１４が接続されている場合に、第２カメラ付き玄関子機１４が呼び出しを行うと、判定制御手段１８にカメラ付き玄関子機１４の着信信号が入力され、その信号を受信した判定制御手段１８はカメラ切り替え手段１９を（ｆ）側に切り替え、ドアホン切り替え手段２１を（ｇ）側に切り替える。そして、カメラ給電手段２０を制御して第２カメラ付き玄関子機１４へ電力を供給し、モニタ給電手段１７を制御してモニタ１６へ電力を供給する。
【００３８】
第２カメラ付き玄関子機１４からの映像信号はカメラ切り替え手段１９とドアホン切り替え手段２１を経てドロップアウト検出手段に入力される。映像信号の入力が正常であった場合は、ドロップアウト検出手段２２から判定制御手段１８に同期信号監視時間内にβ回以上の同期信号の入力は行われない。同期信号監視時間内にβ回以上の同期信号の入力を受けなかった判定制御手段１８は、モニタ給電手段１７とカメラ給電手段２０を制御しないので、モニタ１６と第２カメラ付き玄関子機１４への電力供給は継続される。モニタ１６には、第２カメラ付き玄関子機１４からの映像信号がカメラ切り替え手段１９を経て入力されているので、モニタ給電手段１７０から電力が供給されることにより、第２カメラ付き玄関子機１４からの映像が表示される。
【００３９】
続いて、第２カメラ付き玄関子機１４が再度呼び出しを行うと、判定制御手段１８にはカメラ付き玄関子機２着信信号は入力されず、ドロップアウト検出手段２２から判定制御手段１８に同期信号監視時間内にα回以上β回未満の同期信号の入力が行われる。上記と同様にして、α回以上β回未満の同期信号の入力を受けた判定制御手段１８は、着信中である第２カメラ付き玄関子機１４から再度呼び出しが行われたことを判定し（ステップＳ１、Ｓ２）、カメラ切り替え手段１９を（ｆ）側のまま保持し、かつドアホン切り替え手段２１を（ｇ）側のまま保持して、モニタ１６への給電を継続し（ステップＳ７）、第１カメラ付き玄関子機１３への給電を継続し（ステップＳ８）、カメラき玄関子機１４の着信中の状態を保持する。
【００４０】
室内モニタ親機２３にカメラなし玄関子機１５が接続されている場合に、カメラなし玄関子機１５が呼び出しを行うと、判定制御手段１８にカメラなし玄関子機の着信信号が入力され、その信号を受信した判定制御手段１８はカメラ切り替え手段１９を（ｅ）側に切り替え、ドアホン切り替え手段２１を（ｈ）側に切り替える。そして、カメラ給電手段２０を制御して電力の供給を停止し、モニタ給電手段１７を制御して電力の供給を停止する。
【００４１】
続いて、カメラなし玄関子機１５が再度呼び出しを行うと、判定制御手段１８にはカメラなし玄関子機の着信信号は入力されず、ドロップアウト検出手段２２から判定制御手段１８に同期信号監視時間内にα回以上β回未満の同期信号の入力が行われる。α回以上β回未満の同期信号の入力を受けた判定制御手段１８は、着信中であるカメラなし玄関子機１５から再度呼び出しが行われたことを判定し、ステップＳ６でドアホン切り替え手段２１は（ｈ）側であると判定した後、カメラ切り替え手段１９を（ｅ）側のまま保持し、かつドアホン切り替え手段２１を（ｈ）側のまま保持して、モニタ給電手段１７による給電を停止し（ステップＳ３）、カメラ給電手段２０による給電を停止し（ステップＳ４）、カメラなし玄関子機１５の着信中の状態を保持する。更に、次のステップＳ５において、ドアホン切り替え手段２１を（ｈ）側へ切り替える。
【００４２】
室内モニタ親機２３の第２カメラ付き玄関子機１４が接続されるべき箇所に、誤ってカメラなし玄関子機を接続し、そのカメラなし玄関子機から呼び出しを行うと、判定制御手段１８にカメラ付き玄関子機２着信信号が入力され、その信号を受信した判定制御手段１８はカメラ切り替え手段１９を（ｆ）側に切り替え、ドアホン切り替え手段２１を（ｇ）側に切り替える。これにより、カメラ給電手段２０を制御して接続された玄関子機へ電力を供給し、モニタ給電手段１７を制御してモニタ１６へ電力を供給するが、ドロップアウト検出手段２２には映像信号が入力されない。
【００４３】
このとき、映像信号の入力が正常でないので、ドロップアウト検出手段２２から判定制御手段１８に同期信号監視時間内にβ回以上の同期信号の入力が行われる。β回以上の同期信号の入力を受けたことをステップＳ２で判定した判定制御手段１８は、映像信号の入力が異常であることを判定し、モニタ給電手段１７を制御して電力の供給を停止し（ステップＳ３）、これによりモニタにノイズが表示されてしまうことを防止する。また、カメラ給電手段２０を制御して電力の供給を停止し（ステップＳ４）、これにより接続されたカメラなし玄関子機に過剰な電力が供給されることを防止する。
【００４４】
同様に、室内モニタ親機２３の第１カメラ付き玄関子機１３が接続されるべき箇所に、誤ってカメラなし玄関子機を接続し、そのカメラなし玄関子機から呼び出しを行った場合も、判定制御手段１８は、カメラ給電手段２０を制御して電力の供給を停止することで、接続されたカメラなし玄関子機に過剰な電力が供給されることを防止し、モニタ給電手段１７を制御して電力の供給を停止することでモニタにノイズが表示されてしまうことを防止する。
【００４５】
判定制御手段１８に室内側から玄関子機１３により玄関を監視する指示が入力されると、判定制御手段１８はカメラ切り替え手段１９を（ｅ）側に切り替え、ドアホン切り替え手段２１を（ｇ）側に切り替える。そして、カメラ給電手段２０を制御して第１カメラ付き玄関子機１３へ電力を供給し、モニタ給電手段１７を制御してモニタ１６へ電力を供給する。
【００４６】
第１カメラ付き玄関子機１３からの映像信号はカメラ切り替え手段１９とドアホン切り替え手段２１を経てドロップアウト検出手段に入力される。映像信号の入力が正常であった場合は、ドロップアウト検出手段２２から判定制御手段１８に同期信号監視時間内にβ回以上の同期信号の入力は行われない。同期信号監視時間内にβ回以上の同期信号の入力を受けなかった判定制御手段１８は、モニタ給電手段１７と、カメラ給電手段２０を制御しないので、モニタ１６と、第１カメラ付き玄関子機１３への電力供給は継続される。モニタ１６には、第１カメラ付き玄関子機１３からの映像信号がカメラ切り替え手段１９を経て入力されているので、電力が供給されることにより、第１カメラ付き玄関子機１３からの映像が表示される。
【００４７】
室内モニタ親機２３に第２カメラ付き玄関子機１４が接続されている場合に、判定制御手段１８に室内側から玄関子機２により玄関を監視する指示が入力されると、判定制御手段１８はカメラ切り替え手段１９を（ｆ）側に切り替え、ドアホン切り替え手段２１を（ｇ）側に切り替える。そして、カメラ給電手段２０を制御して第２カメラ付き玄関子機１４へ電力を供給し、モニタ給電手段１７を制御してモニタ１６へ電力を供給する。
【００４８】
第２カメラ付き玄関子機１４からの映像信号はカメラ切り替え手段１９とドアホン切り替え手段２１を経てドロップアウト検出手段に入力される。映像信号の入力が正常であった場合は、ドロップアウト検出手段２２から判定制御手段１８に同期信号監視時間内にβ回以上の同期信号の入力は行われない。同期信号監視時間内にβ回以上の同期信号の入力を受けなかった判定制御手段１８は、モニタ給電手段１７とカメラ給電手段２０を制御しないので、モニタ１６と第２カメラ付き玄関子機１４への電力供給は継続される。モニタ１６には、第２カメラ付き玄関子機１４からの映像信号がカメラ切り替え手段１９を経て入力されているので、モニタ給電手段１７から電力が供給されることにより、第２カメラ付き玄関子機１４からの映像が表示される。
【００４９】
室内モニタ親機２３にカメラなし玄関子機１５が接続されている場合に、判定制御手段１８に室内側から玄関子機２により玄関を監視する指示が入力されると、判定制御手段１８はカメラ切り替え手段１９を（ｆ）側に切り替え、ドアホン切り替え手段２１を（ｇ）側に切り替える。これにより、カメラ給電手段２０を制御してカメラ付き玄関子機２のための電力を供給し、モニタ給電手段１７を制御してモニタ１６へ電力を供給するが、ドロップアウト検出手段２２には映像信号が入力されない。
【００５０】
このとき、映像信号の入力が正常でないので、上記と同様に、ドロップアウト検出手段２２から判定制御手段１８に同期信号監視時間内にβ回以上の同期信号の入力が行われる。そして、β回以上の同期信号の入力を受けた判定制御手段１８は、映像信号の入力が異常であることを判定し、カメラ給電手段２０を制御して電力の供給を停止することで、接続されたカメラなし玄関子機に過剰な電力が供給されることを防止し、モニタ給電手段１７を制御して電力の供給を停止することでモニタにノイズが表示されてしまうことを防止し、ドアホン切り替え手段２１を（ｈ）側に切り替えることでカメラなし玄関子機１５と接続することができる。
【００５１】
【発明の効果】
以上の説明から明らかなように、本発明によれば、映像表示機能付きのインターホンの室内モニタ親機に、カメラ付き玄関子機が接続されていない場合に、カメラ付き玄関子機のための電力を供給して、玄関子機からの信号を受信して映像信号としての異常を判定することにより、カメラ付き玄関子機が接続されていないことを接続機器の設定スイッチなどを設けることなく自動的に判別し、カメラ付き玄関子機への供給電力を切断することで、カメラ付き玄関子機以外の機器を誤って接続した場合でも、接続された機器が過剰な電力供給によって破壊されることを防止することができ、テレビドアホンのコストを低減する効果が得られる。
【００５２】
更に、カメラ付き玄関子機が接続されていないことを判別した場合に、カメラ付き玄関子機のための電源切断と共に、室内モニタ親機の映像表示手段の電源を切断し、室内モニタ親機の映像手段にノイズが表示されることを防止することができる。
【００５３】
また、本発明によれば、カメラなし玄関子機が接続されている場合に、室内側から玄関を監視する指示を判定制御手段が受けると、カメラ付き玄関子機のための電力とモニタの電力を供給し、ドアホン切り替え手段を制御してカメラ付き玄関子機へ一旦接続をするが、カメラ付き玄関子機が接続されていないことを接続機器の設定スイッチなどを設けることなく自動的に判定し、判定制御手段がカメラ給電手段とモニタ給電手段を制御してカメラ付き玄関子機への供給電源とモニタへの供給電源を切断するとともにドアホン切り替え手段を制御してカメラなし玄関子機へ接続することができる。
【図面の簡単な説明】
【図１】本発明の実施の形態１におけるカメラドアホン装置の構成を示すブロック図
【図２】本発明の実施の形態２におけるカメラドアホン装置の構成を示すブロック図
【図３】本発明の実施の形態２における同期信号監視時間経過時の判定制御手段１８の動作手順を示すフローチャート
【符号の説明】
１第１カメラ付き玄関子機
２第２カメラ付き玄関子機
３カメラなし玄関子機
４モニタ
５モニタ給電手段
６制御手段
７カメラ切り替え手段
８カメラ給電手段
９ドアホン切り替え手段
１０映像入力判定手段
１２室内モニタ親機
１３第１カメラ付き玄関子機
１４第２カメラ付き玄関子機
１５カメラなし玄関子機
１６モニタ
１７モニタ給電手段
１８判定制御手段
１９カメラ切り替え手段
２０カメラ給電手段
２１ドアホン切り替え手段
２２ドロップアウト検出手段
２３室内モニタ親機[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a television doorphone device that controls a power supply to an intercom with a camera of an intercom having a function of displaying an image and a power supply to a monitor of an indoor monitor master unit.
[0002]
[Prior art]
Conventionally, when connecting an entrance slave unit without a camera to the monitor master unit, a switch for setting the presence or absence of a camera of the slave unit is provided in the indoor monitor master unit, and by switching this switch, the power supply to the camera-equipped entrance slave unit is provided. And the power supply of the video display means of the parent monitor is controlled.
[0003]
Further, as disclosed in Japanese Patent Publication No. 8-154132, an entrance cordless handset connection adapter is provided between the entrance cordless handset and the parent machine to automatically detect the presence of a camera of the entrance cordless handset.
[0004]
[Problems to be solved by the invention]
However, in such a conventional method, if the setting of the switch for setting the presence or absence of the camera is incorrectly set, power is supplied to the image display means of the indoor monitor master unit even though the entrance unit without camera is connected, and noise is generated. Is displayed, or, conversely, no image is displayed even when the camera-equipped entrance device is connected.
[0005]
In addition, if a device unrelated to the intercom is accidentally connected as a front-end device, setting the setting switch with a camera will cause power to be supplied to the connected device, which may cause damage to the device. was there. In addition, as shown in Japanese Patent Publication No. 154132/1990, the method of providing an entrance device connection adapter increases the cost.
[0006]
The present invention has been made to solve the above problem, and automatically determines whether or not an entrance terminal connected to an indoor monitor parent device is an entrance device with a camera, and an entrance device other than the entrance device with a camera. It is an object of the present invention to provide a television intercom apparatus capable of reducing the cost by automatically disconnecting the power supply to the entrance terminal and the power supply to the monitor when the apparatus is connected.
[0007]
[Means for Solving the Problems]
In order to solve this problem, the present invention relates to a television door phone device having an indoor monitor master unit to which at least one of a camera-equipped entrance slave unit and a camera-less entrance slave unit is connected, wherein the indoor monitor master unit is provided with the camera. Take a picture at the entrance child machine Shadow Monitor displaying the displayed image, and the camera-equipped entrance device or the camera-less entrance device From Control means for outputting a control signal corresponding to an incoming signal of the camera and a monitoring instruction signal of the camera-equipped entrance terminal from the indoor side, Video input determination means for determining whether a signal from the camera-equipped entrance terminal is normal or abnormal as a video signal and notifying the control means of a determination result, From the control means System A monitor power supply unit for supplying power to the monitor by a control signal; System Switch the camera-equipped entrance slave to the monitor by a control signal and connect camera Switching means and the control means System By your signal Switched and connected to the monitor A camera power supply unit for supplying power to the camera-equipped entrance device, and System By your signal Previous Entrance device with camera or entrance device without camera Switch the signal from the input to the video input determination means Doorphone switching means When the video input determination means determines that the input signal is abnormal as a video signal, the control means controls the monitor power supply means and the camera power supply means to the monitor and the camera-equipped entrance device. Characterized by stopping power supply to Things.
[0008]
With this, it is possible to automatically determine whether or not the entrance slave unit connected to the indoor monitor master unit is the entrance slave unit with a camera, and when the entrance slave unit other than the entrance slave unit with the camera is connected, the entrance slave unit is connected to the entrance slave unit. The power supply to the slave unit and the power supply to the monitor can be automatically cut off.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
The invention according to claim 1 of the present invention is a television door phone device having an indoor monitor master unit to which at least one of a camera-equipped entrance slave unit and a camera-less entrance slave unit is connected, wherein the indoor monitor master unit is: Take a picture with the camera Shadow Monitor displaying the displayed image, and the camera-equipped entrance device or the camera-less entrance device From Control means for outputting a control signal corresponding to an incoming signal of the camera and a monitoring instruction signal of the camera-equipped entrance terminal from the indoor side, Video input determination means for determining whether a signal from the camera-equipped entrance terminal is normal or abnormal as a video signal and notifying the control means of a determination result, From the control means System A monitor power supply unit for supplying power to the monitor by a control signal; System By your signal Said Switch the front door with camera to the monitor and connect camera Switching means and the control means System By your signal Switched and connected to the monitor A camera power supply unit for supplying power to the camera-equipped entrance device, and System By your signal Previous Entrance device with camera or entrance device without camera Switch the signal from the input to the video input determination means Doorphone switching means When the video input determination means determines that the input signal is abnormal as a video signal, the control means controls the monitor power supply means and the camera power supply means to the monitor and the camera-equipped entrance device. Characterized by stopping power supply to Things.
[0011]
By this, when the camera-equipped entrance terminal is not connected to the indoor monitor parent device, the camera-equipped entrance device is not connected by receiving the signal from the entrance device by the video input determination means. Is automatically determined without providing a setting switch for the connected device, and the control means controls the camera power supply means to cut off the power supply to the camera-equipped entrance device, thereby automatically stopping the supply of unnecessary power. Even if another device is mistakenly connected as a camera-equipped entrance device, it is possible to prevent the connected device from being damaged by excessive power supply. Further, when it is determined that the camera-equipped entrance device is not connected, the control means controls the monitor power supply means of the indoor monitor master device to supply the power to the monitor together with the power-off for the camera-emission device. By turning off the power, it is possible to prevent noise from being displayed on the monitor of the indoor monitor master unit. Also, when the control unit receives an instruction to monitor the entrance from the indoor side when the camera-less entrance device is connected, the power supply for the camera-equipped entrance device and the power supply of the monitor are supplied, and the doorphone switching device is provided. Is connected to the camera-equipped entrance device, but it is automatically determined that the camera-equipped entrance device is not connected without providing a setting switch or the like of the connected device. And the monitor power supply means to cut off the power supply to the camera-equipped entrance device and the monitor, and to control the intercom switching device to connect to the camera-less entrance device.
[0012]
Claims of the invention 2 The invention described in 1 above is a television door phone apparatus having an indoor monitor master unit to which at least one of a camera-equipped entrance slave unit and a camera-less entrance slave unit is connected, wherein the indoor monitor master unit is the camera-equipped entrance slave unit. Take with Shadow A monitor for displaying the received video, a drop-out detecting means for detecting a drop-out of a synchronization signal from a video signal of the front door with camera, and a front door without camera or a front door without camera From And a control signal corresponding to the monitoring instruction signal of the camera-equipped entrance slave unit from the indoor side, and counting of the synchronization signal from the dropout detection means within a predetermined time. Based on the Video signal Is normal State, the state of re-incoming calls from the incoming handset and Video signal is abnormal A judgment control means for judging a state; System Supply power to the monitor by a control signal Rumo A power supply means, Judgment From control means System By your signal Said Switch the front door with camera to the monitor and connect camera Switching means, and Judgment From control means System By your signal Switched and connected to the monitor Supply power to the camera-equipped entrance device Ruka Camera feeding means, and Judgment From control means System By your signal Switching the signal from the camera-equipped entrance terminal or the camera-less entrance terminal and inputting it to the dropout detection means Intercom switching means The determination control means controls the monitor power supply means and the camera power supply means to the monitor and the camera-equipped entrance device when the video signal is determined to be in an abnormal state from the count value of the synchronization signal within a predetermined time. Power supply is stopped. When the camera-equipped entrance device is not connected to the indoor monitor parent device, a signal from the entrance device is received by the drop-out detection device, and the determination control device sets a constant synchronization signal input from the drop-out detection device. In time The video signal is compared with the threshold based on the count value, Judgment, by controlling the camera power supply means and turning off the power supply to the camera , Mosquito Unnecessary power supply can be automatically stopped when a cameraless entrance cordless handset is connected, and even if another device is mistakenly connected as the entrance cordless handset, the connected equipment will supply excessive power. Can be prevented from being destroyed. Furthermore, If the video signal is abnormal When the determination is made, the control unit controls the monitor power supply unit of the indoor monitor master unit and cuts off the power supply to the monitor, and the noise of the monitor of the indoor monitor master unit is cut off together with the power supply for the camera-equipped entrance slave unit. Can be prevented from being displayed. In addition, when the entrance control unit without a camera is connected, when the determination control unit receives an instruction to monitor the entrance from the indoor side, the power supply for the entrance unit with the camera and the power supply of the monitor are supplied, and the doorphone is switched. Entrance control unit with camera by controlling means As if connected Once connected You However, it is automatically determined that the camera-equipped entrance device is not connected without providing a setting switch of the connected device, and the determination control means controls the camera power supply means and the monitor power supply means. Entrance cordless handset without camera connected The power supply to the monitor and the power supply to the monitor can be cut off, and the doorphone switching means can be controlled to connect to the front door without camera.
[0013]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
[0014]
(Embodiment 1)
FIG. 1 is a block diagram illustrating a configuration of a camera door phone device according to Embodiment 1 of the present invention. In FIG. 1, one of the slave unit connection terminals 121 to 123 of the indoor monitor master unit 12 has an entrance slave unit 1 with a first camera and an entrance slave unit 2 with a second camera or an entrance slave unit 3 without a camera. One of them is connected.
[0015]
The indoor monitor master unit 12 captures images with the camera 111 or 211 of the first camera-equipped entrance device 1 or the second camera-equipped entrance device 2. Shadow Monitor 4 for displaying the displayed video, monitor power supply means 5 for supplying power to monitor 4, incoming signal from first camera-equipped entrance device 1 and second camera-equipped entrance device 2 or camera-less entrance device 3 And a monitoring instruction signal for the first camera-equipped entrance device 1 or the second camera-equipped entrance device 2 from the room, and a judgment signal from a video input judgment means 10 to be described later to control the power supply section and each switching section. The control means 6 switches any one of the slave terminal connection terminals 121 and 122 connected to the first camera-equipped entrance terminal 1 or the second camera-equipped entrance terminal 2 to the monitor 4 in accordance with a control signal from the control means 6. camera A camera power supply unit 8 that is controlled by the switching unit 7 and the control unit 6 and that supplies power to the first camera-equipped entrance device 1 or the second camera-equipped entrance device 2 that is connected to the child device connection terminal 121 or 122; By the control signal from the means 6 camera Doorphone switching means 9 for switching and connecting to switching means 7 or slave unit connection terminal 123, camera A switching means 7 and a doorphone switching means 9 or a video input determination means 10 for determining the presence or absence of a video signal from the entrance slave via the doorphone switching means 9 or an abnormality.
[0016]
In this configuration, when the first camera-equipped entrance device 1 makes a call, an incoming signal of the first camera-equipped entrance device 1 is input to the control means 6, and the control means 6 having received the signal sends the camera switching means 7 Is switched to the (a) side, and the intercom switching means 9 is switched to the (c) side. Further, it controls the camera power supply means 8 to supply power to the first camera-equipped entrance device 1, and further controls the monitor power supply means 5 to supply power to the monitor 4.
[0017]
The video signal from the first camera-equipped entrance device 1 is input to the video input determination device 10 via the camera switching device 7 and the doorphone switching device 9. When the input of the video signal is normal, the video input determination unit 10 does not notify the control unit 6 that the input of the video signal is abnormal. Since the control unit 6 that has not received the notification that the input of the video signal is abnormal does not control the monitor power supply unit 5 and the camera power supply unit 8, power supply to the monitor 4 and the first camera-equipped entrance device 1 is continued. You. Also, since the video signal from the first camera-equipped entrance device 1 is input to the monitor 4 via the camera switching device 7, the power is supplied from the monitor power supply device 5, so that the first camera-equipped entrance device is provided. The image from the device 1 is displayed.
[0018]
When the second slave unit 2 with a camera makes a call when the second slave unit 2 with a camera is connected to the indoor monitor master unit 12, the control unit 6 receives an incoming call of the second slave unit 2 with a camera. Upon receiving the signal, the control means 6 which has received the signal switches the camera switching means 7 to the (b) side and switches the intercom switching means 9 to the (c) side. Further, it controls the camera power supply means 8 to supply power to the second camera-equipped entrance device 2, and controls the monitor power supply means 5 to supply power to the monitor 4.
[0019]
The video signal from the second camera-equipped entrance terminal 2 is input to the video input determination means 10 via the camera switching means 7 and the doorphone switching means 9. When the input of the video signal is normal, the video input determination unit 10 does not notify the control unit 6 that the input of the video signal is abnormal. Since the control unit 6 that has not received the notification that the input of the video signal is abnormal does not control the monitor power supply unit 5 and the camera power supply unit 8, power supply to the monitor 4 and the first camera-equipped entrance device 1 is continued. You. Since the video signal from the second camera-equipped entrance device 2 is input to the monitor 4 via the camera switching means 7, the power is supplied from the monitor power supply means 5, so that the second camera-equipped entrance device is provided. 2 are displayed.
[0020]
When the front entrance unit 3 without a camera is connected to the indoor monitor parent unit 12 and a call is made by the front entrance unit 3 without a camera, an incoming signal of the front entrance unit 3 without a camera is inputted to the control means 6, and Upon receiving the signal, the control means 6 switches the camera switching means 7 to the (a) side, and switches the doorphone switching means 9 to the (d) side. Further, the power supply to the monitor 4 is stopped by controlling the camera power supply means 8 and the power supply to the monitor 4 is controlled by controlling the monitor power supply means 5.
[0021]
If a doorless cameraless camera is erroneously connected to the place where the second cameraless handset 2 of the indoor monitor master unit 12 is to be connected, and a call is made from this cameraless handset, the control means 6 The control means 6 receives the incoming signal of the attached entrance cordless handset 2 and switches the camera switching means 7 to the (b) side, and switches the intercom switching means 9 to the (c) side. Then, it controls the camera power supply means 8 to supply power to the connected entrance cordless handset, and controls the monitor power supply means 5 to supply power to the monitor 4. However, no video signal is input to the video input determination means 10. .
[0022]
Therefore, when the video input determination means 10 determines that there is no video signal input, the video input determination means 10 notifies the control means 6 that the video signal input is abnormal. The control unit 6, which has received the notification that the input of the video signal is abnormal, controls the camera power supply unit 8 to stop the supply of power, so that excessive power is supplied to the erroneously connected front door without camera. In addition, by controlling the monitor power supply means 5 and stopping the supply of power, the display of noise on the monitor 4 is prevented.
[0023]
Similarly, when a doorless camera-less terminal is accidentally connected to a place where the first camera-equipped doorless handset 1 of the indoor monitor master unit 12 is to be connected, and a call is made from this cameraless door-less handset, The control unit 6 controls the camera power supply unit 8 to stop the supply of power, thereby preventing excessive power from being supplied to the erroneously connected front door without camera, and controlling the monitor power supply unit 5. Controlling the supply of power prevents the monitor 4 from displaying noise.
[0024]
On the other hand, when an instruction to monitor the entrance from the indoor side is input to the control means 6 from the indoor side, the control means 6 switches the camera switching means 7 to the (a) side, and switches the intercom switching means 9 to the (c) side. Switch to Then, it controls the camera power supply means 8 to supply power to the first camera-equipped entrance device 1, and controls the monitor power supply means 5 to supply power to the monitor 4.
[0025]
The video signal from the first camera-equipped entrance device 1 is input to the video input determination device 10 via the camera switching device 7 and the doorphone switching device 9. When the input of the video signal is normal, the video input determination unit 10 does not notify the control unit 6 that the input of the video signal is abnormal. Since the control unit 6 that has not received the notification that the input of the video signal is abnormal does not control the monitor power supply unit 5 and the camera power supply unit 8, power supply to the monitor 4 and the first camera-equipped entrance device 1 is continued. You. Since the video signal from the first camera-equipped entrance device 1 is input to the monitor 4 via the camera switching means 7, the power is supplied from the monitor power supply means 5 to the first camera-equipped entrance device. 1 is displayed.
[0026]
When the second camera-equipped entrance slave unit 2 is connected to the indoor monitor master unit 12 and an instruction to monitor the entrance by the entrance slave unit 2 from the indoor side is input to the control unit 6, the control unit 6 The camera switching means 7 is switched to the (b) side, and the doorphone switching means 9 is switched to the (c) side. Then, it controls the camera power supply unit 8 to supply power to the second camera-equipped entrance device 2, and controls the monitor power supply unit 5 to supply power to the monitor 4.
[0027]
The video signal from the second camera-equipped entrance terminal 2 is input to the video input determination means 10 via the camera switching means 7 and the doorphone switching means 9. When the input of the video signal is normal, the video input determination unit 10 does not notify the control unit 6 that the input of the video signal is abnormal. Since the control unit 6 that has not received the notification that the input of the video signal is abnormal does not control the monitor power supply unit 5 and the camera power supply unit 8, power supply to the monitor 4 and the first camera-equipped entrance device 1 is continued. You. Since the video signal from the second camera-equipped entrance device 2 is input to the monitor 4 via the camera switching means 7, the power is supplied from the monitor power supply means 5, so that the second camera-equipped entrance device is provided. 2 are displayed.
[0028]
When the entrance monitor 3 without camera is connected to the indoor monitor base unit 12 and an instruction to monitor the entrance by the entrance sub unit 2 is input to the control unit 6 from the indoor side, the control unit 6 switches the camera. The means 7 is switched to the (b) side, and the intercom switching means 9 is switched to the (c) side. Then, the camera power supply means 8 is controlled to supply power to the second camera-equipped entrance device 2, and the monitor power supply means 5 is controlled to supply power to the monitor 4. Not entered.
[0029]
Therefore, when the video input determination means 10 determines that there is no video signal input, the video input determination means 10 notifies the control means 6 that the video signal input is abnormal. The control means 6 having received the notification that the input of the video signal is abnormal can switch the intercom switching means 9 to the side (d) to connect to the front-end device 3 without a camera. By stopping the supply of electric power, it is possible to prevent excessive electric power from being supplied to the cameraless front-end unit 3, and to further control the monitor power supply unit 5 to stop the supply of electric power, thereby causing the monitor 4 to emit noise. Is prevented from being displayed.
[0030]
(Embodiment 2)
FIG. 2 is a block diagram showing a configuration of a camera intercom apparatus according to Embodiment 2 of the present invention. In FIG. 1, any one of the slave unit connection terminals 231 to 233 of the indoor monitor master unit 23 has an entrance slave unit 13 with a first camera, an entrance slave unit 14 with a second camera, or an entrance slave unit 15 without a camera. One of them is connected.
[0031]
The indoor monitor base unit 23 includes a monitor 16 that displays an image captured by the camera 131 or 141 of the first camera-equipped entrance terminal 13 or the second camera-equipped entrance terminal 14, and a monitor power supply that supplies power to the monitor 16. Means 17, an incoming signal from the first camera-equipped entrance device 13 and the second camera-equipped entrance device 14 or a camera-less entrance device 15, or a first camera-equipped entrance device 13 or a second camera-equipped entrance device from the room. Control means 18 for receiving a monitoring instruction signal of the machine 14 and a detection signal from a dropout detection means 22 to be described later and controlling the power supply unit and each switching unit. A camera disconnector that switches any one of the slave unit connection terminals 231 and 232 connected to the slave unit 13 or the second camera-equipped entrance slave unit 14 to the monitor 16 for connection A camera power supply means 20, which is controlled by the determination means 18 and supplies power to the first camera-equipped entrance device 13 or the second camera-equipped entrance device 14 connected to the child device connection terminal 231 or 232, Doorphone switching means 21 for switching and connecting to camera switching means 19 or slave unit connection terminal 233 according to a control signal from determination control means 18, camera switching means 19 and doorphone switching means 21 or the first camera entrance via doorphone switching means 21. The slave unit 13 is switched and connected to the camera switching unit 19 and the cameraless front door unit 15 via the doorphone switching unit 21, and detects a dropout of the synchronization signal from the video signal of the incoming call terminal unit with a camera. And a drop-out detecting means 22 for performing the operation.
[0032]
The dropout detection means 22 outputs a synchronization signal of α times or more and less than β times within the synchronization signal monitoring time when there is a re-incoming call from the entrance cordless handset that has received the call, and outputs the synchronization signal from the camera-equipped entrance cordless handset. If the video signal is abnormal, the synchronizing signal is output β times or more within the synchronizing signal monitoring time. Then, the determination control unit 18 determines the state of no video signal, the state of re-incoming from the incoming terminal, and the state of the entrance with a camera, based on the count threshold of the synchronization signal input from the drop-out detecting unit 22 within a predetermined time. It is determined that the slave unit is not connected.
[0033]
FIG. 3 is a flowchart showing the operation procedure of the determination control means 18 when the synchronization signal monitoring time has elapsed.
[0034]
The operation of the second embodiment thus configured will be described with reference to FIG. When the first camera-equipped entrance terminal 13 makes a call, an incoming signal of the camera-equipped entrance device 13 is input to the judgment control unit 18, and the judgment control unit 18 that has received the signal sets the camera switching unit 19 to (e). Side, and the intercom switching means 21 is switched to the (g) side. Then, it controls the camera power supply means 20 to supply power to the first camera-equipped entrance device 13, and controls the monitor power supply means 17 to supply power to the monitor 16.
[0035]
The video signal from the first camera-equipped entrance slave unit 13 is input to the dropout detection unit via the camera switching unit 19 and the doorphone switching unit 21. When the input of the video signal is normal, the synchronization signal is not input more than β times from the dropout detection unit 22 to the determination control unit 18 within the synchronization signal monitoring time. The determination control unit 18 that has not received the input of the synchronization signal more than β times within the synchronization signal monitoring time does not control the monitor power supply unit 17 and the camera power supply unit 20. Power supply is continued. Since a video signal from the first camera-equipped entrance device 13 is input to the monitor 16 via the camera switching means 19, the power is supplied from the monitor power supply means 17 to the first camera-equipped entrance device. 13 is displayed.
[0036]
Subsequently, when the first camera-equipped entrance device 13 calls again, the incoming signal of the camera-equipped entrance device 13 is not inputted to the judgment control means 18, and the signal is synchronized with the drop-out detection means 22 to the judgment control means 18. The synchronization signal is input at least α times and less than β times within the signal monitoring time. As a result, the determination control unit 18 determines whether the input of the synchronization signal from the dropout detection unit 22 is α times or more (step S1) or β times or more (step S2) within the synchronization signal monitoring time, and α times or more The determination control unit 18, which has determined that the synchronization signal has been input less than twice, determines that the first camera-equipped entrance slave unit 13 that has received the call has been called again, and in step S6, the intercom switching unit 21 determines (h ) Side, the camera switching means 19 is maintained at the (e) side, and the doorphone switching means 21 is maintained at the (g) side, and power supply to the monitor 16 is continued (step S7). ), The power supply to the first camera-equipped entrance device 13 is continued (step S8), and the incoming state of the camera-equipped entrance device 13 is maintained.
[0037]
If the second camera-equipped entrance slave 14 makes a call when the second camera-equipped entrance slave 14 is connected to the indoor monitor master unit 23, an incoming signal of the camera-equipped entrance slave 14 is transmitted to the determination control means 18. Is input, and the determination control means 18 that has received the signal switches the camera switching means 19 to the (f) side and switches the intercom switching means 21 to the (g) side. Then, it controls the camera power supply means 20 to supply power to the second camera-equipped entrance device 14, and controls the monitor power supply means 17 to supply power to the monitor 16.
[0038]
The video signal from the second camera-equipped entrance slave unit 14 is input to the dropout detection unit via the camera switching unit 19 and the doorphone switching unit 21. When the input of the video signal is normal, the synchronization signal is not input more than β times from the dropout detection unit 22 to the determination control unit 18 within the synchronization signal monitoring time. The determination control unit 18 that has not received the input of the synchronization signal more than β times within the synchronization signal monitoring time does not control the monitor power supply unit 17 and the camera power supply unit 20, so that the determination control unit 18 sends the monitor 16 and the second camera-equipped entrance device 14. Power supply is continued. Since the video signal from the second camera-equipped entrance device 14 is input to the monitor 16 via the camera switching means 19, the power is supplied from the monitor power supply means 170 to the second camera-equipped entrance device. The video from 14 is displayed.
[0039]
Subsequently, when the second camera-equipped entrance device 14 calls again, the incoming signal of the camera-equipped entrance device 2 is not input to the judgment control means 18, and the drop-out detection means 22 sends the synchronization signal to the judgment control means 18. The synchronization signal is input at least α times and less than β times within the monitoring time. In the same manner as described above, the determination control unit 18 that has received the input of the synchronization signal of α times or more and less than β times determines that a call is made again from the second camera-equipped entrance terminal 14 that is receiving a call ( (Steps S1 and S2), the camera switching means 19 is kept at the (f) side, and the intercom switching means 21 is kept at the (g) side, and power supply to the monitor 16 is continued (step S7). The power supply to the one camera-equipped entrance terminal 13 is continued (step S8), and the incoming state of the camera-equipped entrance terminal 14 is maintained.
[0040]
When the front door without camera 15 is connected to the indoor monitor base unit 23 and the front door without camera 15 makes a call, an incoming signal of the front door without camera is input to the determination control means 18, Upon receiving the signal, the determination control means 18 switches the camera switching means 19 to the (e) side, and switches the doorphone switching means 21 to the (h) side. Then, the power supply is stopped by controlling the camera power supply means 20, and the power supply is stopped by controlling the monitor power supply means 17.
[0041]
Subsequently, when the camera-less entrance terminal 15 calls again, the incoming signal of the camera-less entrance terminal is not input to the determination control unit 18, and the synchronization signal monitoring time is sent from the dropout detection unit 22 to the determination control unit 18. Within this time, the synchronization signal is input at least α times and less than β times. The determination control means 18 having received the input of the synchronizing signal of α times or more and less than β times determines that the incoming call has been made again from the front entrance terminal 15 without a camera which is receiving a call, and the intercom switching means 21 determines in step S6. After it is determined that the camera is on the (h) side, the camera switching means 19 is maintained at the (e) side, and the intercom switching means 21 is maintained at the (h) side, and the power supply by the monitor power supply means 17 is stopped. (Step S3), the power supply by the camera power supply means 20 is stopped (Step S4), and the incoming state of the camera-less entrance terminal 15 is maintained. Further, in the next step S5, the doorphone switching means 21 is switched to the (h) side.
[0042]
If the camera-less entrance slave unit is erroneously connected to the place where the second camera-equipped entrance slave unit 14 of the indoor monitor master unit 23 is to be connected, and a call is made from the camera-less entrance slave unit, the judgment control means 18 Upon receiving the incoming signal of the entrance terminal 2 with a camera, the judgment control means 18 receiving the signal switches the camera switching means 19 to the (f) side and switches the intercom switching means 21 to the (g) side. As a result, the camera power supply means 20 is controlled to supply power to the connected entrance slave unit, and the monitor power supply means 17 is controlled to supply power to the monitor 16. Not entered.
[0043]
At this time, since the input of the video signal is not normal, the synchronization signal is input β times or more from the dropout detection unit 22 to the determination control unit 18 within the synchronization signal monitoring time. The determination control unit 18, which has determined in step S2 that the synchronization signal has been input at least β times, determines that the input of the video signal is abnormal, and controls the monitor power supply unit 17 to stop the power supply. (Step S3), thereby preventing the noise from being displayed on the monitor. In addition, the camera power supply means 20 is controlled to stop the supply of power (step S4), thereby preventing excessive power from being supplied to the connected cameraless entrance device.
[0044]
Similarly, in the case where the camera-less entrance cordless handset is erroneously connected to the place where the first camera-equipped entrance cordless handset 13 of the indoor monitor master unit 23 is to be connected, and the camera-less entrance cordless handset is called, The determination control unit 18 controls the camera power supply unit 20 to stop the supply of power, thereby preventing excessive power from being supplied to the connected cameraless entrance device and controlling the monitor power supply unit 17. By stopping the supply of power, noise is prevented from being displayed on the monitor.
[0045]
When an instruction to monitor the entrance by the entrance slave unit 13 is input from the indoor side to the determination control means 18, the determination control means 18 switches the camera switching means 19 to the (e) side, and switches the intercom switching means 21 to the (g) side. Switch to Then, it controls the camera power supply means 20 to supply power to the first camera-equipped entrance device 13, and controls the monitor power supply means 17 to supply power to the monitor 16.
[0046]
The video signal from the first camera-equipped entrance slave unit 13 is input to the dropout detection unit via the camera switching unit 19 and the doorphone switching unit 21. When the input of the video signal is normal, the synchronization signal is not input more than β times from the dropout detection unit 22 to the determination control unit 18 within the synchronization signal monitoring time. The determination control unit 18 that has not received the input of the synchronization signal more than β times within the synchronization signal monitoring time does not control the monitor power supply unit 17 and the camera power supply unit 20. Power supply to 13 is continued. Since the video signal from the first camera-equipped entrance device 13 is input to the monitor 16 via the camera switching means 19, the image from the first camera-equipped entrance device 13 is supplied by supplying power. Is displayed.
[0047]
When the second camera-equipped entrance slave unit 14 is connected to the indoor monitor master unit 23, when an instruction to monitor the entrance by the entrance slave unit 2 is input from the indoor side to the judgment control unit 18, the judgment control unit 18 Switches the camera switching means 19 to the (f) side and switches the intercom switching means 21 to the (g) side. Then, it controls the camera power supply means 20 to supply power to the second camera-equipped entrance device 14, and controls the monitor power supply means 17 to supply power to the monitor 16.
[0048]
The video signal from the second camera-equipped entrance slave unit 14 is input to the dropout detection unit via the camera switching unit 19 and the doorphone switching unit 21. When the input of the video signal is normal, the synchronization signal is not input more than β times from the dropout detection unit 22 to the determination control unit 18 within the synchronization signal monitoring time. The determination control unit 18 that has not received the input of the synchronization signal more than β times within the synchronization signal monitoring time does not control the monitor power supply unit 17 and the camera power supply unit 20, so that the determination control unit 18 sends the monitor 16 and the second camera-equipped entrance device 14. Power supply is continued. Since the video signal from the second camera-equipped entrance device 14 is input to the monitor 16 via the camera switching unit 19, the power is supplied from the monitor power supply unit 17 to the second camera-equipped entrance device. The video from 14 is displayed.
[0049]
When the entrance monitor 15 without a camera is connected to the indoor monitor master unit 23, when an instruction to monitor the entrance by the entrance slave 2 is input from the indoor side to the judgment control unit 18, the judgment control unit 18 The switching means 19 is switched to the (f) side, and the intercom switching means 21 is switched to the (g) side. As a result, the camera power supply means 20 is controlled to supply power for the camera-equipped entrance device 2, and the monitor power supply means 17 is controlled to supply power to the monitor 16. No signal is input.
[0050]
At this time, since the input of the video signal is not normal, the synchronization signal is input β times or more from the dropout detection unit 22 to the determination control unit 18 within the synchronization signal monitoring time in the same manner as described above. Then, the determination control unit 18 that has received the input of the synchronizing signal at least β times determines that the input of the video signal is abnormal, and controls the camera power supply unit 20 to stop the supply of the electric power, thereby making the connection. To prevent excessive power from being supplied to the entrance device without camera, and to prevent noise from being displayed on the monitor by controlling the monitor power supply means 17 and stopping the supply of power. By switching the switching means 21 to the (h) side, it is possible to connect to the entrance device 15 without a camera.
[0051]
【The invention's effect】
As is apparent from the above description, according to the present invention, when the entrance unit with camera is not connected to the indoor monitor parent unit of the intercom with the image display function, the power for the entrance unit with camera is Supply And receives the signal from the entrance cordless handset to determine the abnormality as a video signal By automatically detecting that the camera-equipped entrance device is not connected without providing a setting switch for the connected device, and cutting off the power supply to the camera-equipped entrance device, the camera-equipped entrance device is not connected. Even if a device other than the device is erroneously connected, the connected device can be prevented from being destroyed by excessive power supply, and the effect of reducing the cost of the TV door phone can be obtained.
[0052]
Further, when it is determined that the camera-equipped entrance device is not connected, the power supply of the camera-equipped entrance device is turned off, and at the same time, the power supply of the image display means of the indoor-monitor main device is turned off. It is possible to prevent noise from being displayed on the image means.
[0053]
Further, according to the present invention, when the entrance control unit without a camera is connected, when the determination control unit receives an instruction to monitor the entrance from the indoor side, the power for the entrance device with a camera and the power of the monitor are received. And controls the doorphone switching means to connect once to the camera-equipped entrance device, but automatically judges that the camera-equipped entrance device is not connected without providing a setting switch or the like on the connected device. The determination control means controls the camera power supply means and the monitor power supply means to cut off the power supply to the camera-equipped entrance device and the monitor power supply, and controls the doorphone switching means to connect to the camera-less entrance device. be able to.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a camera intercom apparatus according to Embodiment 1 of the present invention.
FIG. 2 is a block diagram showing a configuration of a camera intercom apparatus according to Embodiment 2 of the present invention.
FIG. 3 is a flowchart showing an operation procedure of a determination control unit 18 when a synchronization signal monitoring time has elapsed in Embodiment 2 of the present invention.
[Explanation of symbols]
1 Entrance cordless handset with first camera
2 Entrance cordless handset with second camera
Entrance cordless handset without 3 cameras
4 Monitor
5 Monitor power supply means
6 control means
7 Camera switching means
8. Camera power supply means
9 Doorphone switching means
10 Image input determination means
12 Indoor monitor base unit
13 Entrance cordless handset with first camera
14. Entrance cordless handset with second camera
15 Entrance cordless handset without camera
16 Monitor
17 Monitor power supply means
18 Judgment control means
19 Camera switching means
20 Camera power supply means
21 Doorphone switching means
22 Dropout detection means
23 Indoor monitor base unit

Claims

A video door phone device having an indoor monitor parent device to which at least one of a camera-equipped entrance device and a camera-less entrance device is connected,
The indoor monitor base unit includes a monitor for displaying the shadow video shot with the camera entrance door station, the camera-equipped entrance door from the incoming signal and the indoor side from the camera entrance door station or a camera without the entrance door station Control means for outputting a control signal corresponding to a monitoring instruction signal of the apparatus, and a video input determination for determining whether a signal from the camera-equipped entrance device is normal or abnormal as a video signal and notifying the control means of a determination result. means and, a monitor power supply means for supplying power to the monitor by the control signal from the control unit, and a camera switching means to switch connection of the camera entrance door station by the control signal from the control unit to the monitor , a camera power supply means for supplying power to the switching connected with camera entrance door station on the monitor by the control signal from said control means, from said control means Switching the signals from the previous SL camera entrance door station or a camera without the entrance door station by the control signal and an intercom switching means for inputting the video input judging unit, a video signal in which the video input determining means is input The television intercom apparatus, wherein when the signal is determined to be abnormal, the control means controls the monitor power supply means and the camera power supply means to stop power supply to the monitor and the camera-equipped entrance device.

A video door phone device having an indoor monitor parent device to which at least one of a camera-equipped entrance device and a camera-less entrance device is connected,
The indoor monitor master unit includes a monitor that displays an image captured by the camera-equipped entrance terminal, and a drop-out detection that detects a synchronization signal drop-out from a video signal of the camera-equipped entrance terminal that has received an incoming call. Means and a control signal corresponding to an incoming signal from the camera-equipped entrance device or a camera-less entrance device and a monitoring instruction signal for the camera-equipped entrance device from the indoor side, and synchronization from the drop-out detection device. Based on the count value of the signal within a certain period of time, the video signal is in a normal state, the state of a re-incoming call from the incoming entrance terminal and the video signal are in an abnormal state. A monitor power supply unit for supplying power to the monitor according to a control signal; A camera switching unit to be connected to the camera, a camera power supply unit for supplying power to the camera-equipped front door unit connected to the monitor by a control signal from the determination control unit, and a control signal from the determination control unit. Doorphone switching means for switching a signal from a camera-equipped entrance terminal or a camera-less entrance terminal and inputting the signal to the drop-out detection means, wherein the determination control means detects a video signal from a count value of a synchronization signal within a predetermined time. A television doorphone device, wherein when the device is determined to be in an abnormal state, the monitor power supply means and the camera power supply means are controlled to stop power supply to the monitor and the camera-equipped entrance device.