JPS63232769A - Television receiver - Google Patents
Television receiverInfo
- Publication number
- JPS63232769A JPS63232769A JP6633187A JP6633187A JPS63232769A JP S63232769 A JPS63232769 A JP S63232769A JP 6633187 A JP6633187 A JP 6633187A JP 6633187 A JP6633187 A JP 6633187A JP S63232769 A JPS63232769 A JP S63232769A
- Authority
- JP
- Japan
- Prior art keywords
- video signal
- circuit
- video
- tuner
- absence
- 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 12
- 238000010586 diagram Methods 0.000 description 2
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、外部ビデオ信号を入力可能なビデオ、入力端
子を備えたテレビジョン受像機に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a television receiver equipped with a video input terminal into which an external video signal can be input.
従来の技術
従来のテレビジョン受像機は第２図に示すような構成に
なっている。2. Description of the Related Art A conventional television receiver has a configuration as shown in FIG.
以下、図面企参照しながら説明すると、テレビ放送を受
像する時は、スイッチ１８をテレビ側にするとスイッチ
１８の接点１９と接点２ｏが接続される。テレビ放送は
アンテナ１６、チューナー１６、’／ＩＦ回路１７、ス
イ７ ｆ （７）接点１９、接点２０．カラー復調回路
２２を通り、陰極線管（以下ＣＲＴと略称する）２３に
映し出される。The following description will be made with reference to the drawings. When receiving a television broadcast, when the switch 18 is set to the television side, the contact 19 and the contact 2o of the switch 18 are connected. For television broadcasting, antenna 16, tuner 16, '/IF circuit 17, switch 7f (7) contact 19, contact 20. The image passes through a color demodulation circuit 22 and is displayed on a cathode ray tube (hereinafter abbreviated as CRT) 23.
ビデオ入力端子２４よりのビデオ信号を受像する時は、
スイッチ１８をビデオ側にすると、スイッチ１８の接点
２１と接点２０が接続される。スイッチ１８の接点２１
と接点２０が接続されると、ビデオ入力端子２４よりの
ビデオ信号はスイッチ１８の接点２１．接点２０．カラ
ー復調回路２２を通り、ＣＲＴ２３に映し出される。When receiving a video signal from the video input terminal 24,
When the switch 18 is set to the video side, the contacts 21 and 20 of the switch 18 are connected. Contact 21 of switch 18
When contact 20 is connected, the video signal from video input terminal 24 is transmitted to contact 21 . Contact point 20. The image passes through the color demodulation circuit 22 and is displayed on the CRT 23.
発明が解決しようとする問題点
しかしながら上記構成では、テレビ放送又はビデオ信号
があるか否かはスイッチ１８をテレビ側又はビデオ側に
切換えてＣＲＴ２３上の画面を見て確認しなければなら
ない。Problems to be Solved by the Invention However, with the above configuration, it is necessary to confirm whether or not there is a television broadcast or video signal by switching the switch 18 to the television side or the video side and looking at the screen on the CRT 23.
本発明は上記問題点に鑑み、スイッチの位置に関係Δ〈
テレビ放送、ビデオ信号の有無を確認することのできる
テレビジョン受像機を提供しようとするものである。In view of the above-mentioned problems, the present invention provides a relationship between Δ<
The purpose of the present invention is to provide a television receiver that can confirm the presence or absence of television broadcasts and video signals.
問題点を解決するための手段
上記間ｍ点を解決するために本発明は、テレビ放送及び
ビデオ信号の有無をそれぞれ検出する回路及び各検出回
路の出力に基づいて各信号が有るか否かを表示する表示
回路を構成したものである。Means for Solving the Problems In order to solve the above problems, the present invention provides a circuit for detecting the presence or absence of a television broadcast signal and a video signal, respectively, and a circuit for detecting the presence or absence of each signal based on the output of each detection circuit. This is a configuration of a display circuit for displaying images.
作用
本発明は上記した構成によって、テレビ放送及びビデオ
信号がある時はそれぞれその旨表示されるため、スイッ
チを切り換えてＣＲＴ上でみなくとも確認出来るもので
ある。Effects of the present invention With the above-described configuration, when there is a television broadcast or a video signal, it is displayed to that effect, so that it can be confirmed without having to flip a switch and view it on the CRT.
実施例
以下、本発明の一実施例のテレビジョン受像機について
図面を参照しながら説明する。第１図は本発明の一実施
例である。図において、１は、アンテナ、２はチューナ
ー、３は７１２回路、４はビデオ信号の有無を検出する
ビデオ信号検出回路で、たとえばその出力はビデオ信号
があるときはＨ”。Embodiment Hereinafter, a television receiver according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of the present invention. In the figure, 1 is an antenna, 2 is a tuner, 3 is a 712 circuit, and 4 is a video signal detection circuit that detects the presence or absence of a video signal. For example, its output is "H" when a video signal is present.
ないときは＋１１．”レベルとなる。６はビデオ信号検
出回路４の出力で動作する表示回路、６は信号切換回路
、１０はカラー復調回路、１１はＣＲＴ、１２はビデオ
入力端子、１３はビデオ入力端子１２に加わる外部ビデ
オ信号の有無を検出するビデオ信号検出回路、１４はこ
のビデオ信号検出回路１３の出力で動作する表示回路で
ある。表示回路６，１４としては、たとえば発光素子が
使用される。If not, +11. 6 is a display circuit operated by the output of the video signal detection circuit 4, 6 is a signal switching circuit, 10 is a color demodulation circuit, 11 is a CRT, 12 is a video input terminal, and 13 is applied to the video input terminal 12. A video signal detection circuit 14 for detecting the presence or absence of an external video signal is a display circuit operated by the output of the video signal detection circuit 13. As the display circuits 6 and 14, for example, light emitting elements are used.
次にその動作を説明する。Next, its operation will be explained.
テレビ放送を受像する時は、スイッチ６をテレビ側にす
ると、スイッチ６の接点７と接点８が接続される。テレ
ビ放送はアンテナ１．チューナー２、ＶＩＰ回路３．ス
イッチ６の接点７．接点８゜カラー復調回路１０を通り
、ＣＲＴｌｌに映し出される。ビデオ入力端子１２より
のビデオ信号全受像する時は、スイッチ６をビデオ側に
すると、スイッチ６の接点９と接点８が接続される。ス
イッチ６の接点９と接点８が接続されると、ビデオ入力
端子１２よりのビデオ信号はスイッチ６の接点９．・接
点８．カラー復調回路１ｏを通り、ＣＲＴｌｌに映し出
される。When receiving a television broadcast, when the switch 6 is set to the television side, the contacts 7 and 8 of the switch 6 are connected. Television broadcasting is on antenna 1. Tuner 2, VIP circuit 3. Contact 7 of switch 6. The image passes through the 8° contact point color demodulation circuit 10 and is displayed on the CRT II. When receiving all the video signals from the video input terminal 12, when the switch 6 is set to the video side, the contacts 9 and 8 of the switch 6 are connected. When the contacts 9 and 8 of the switch 6 are connected, the video signal from the video input terminal 12 is transmitted to the contacts 9.8 of the switch 6.・Contact point 8. The image passes through the color demodulation circuit 1o and is displayed on the CRTll.
一万、テレビ放送があるときは、ビデオ信号検出回路４
でそれを検出し、“Ｌ″から゛Ｈ″レベルに変る検出出
力で表示回路５を駆動し、たとえば発光素子を点灯させ
てテレビ放送があることを表示する。また、ビデオ入力
端子１２にビデオ信号がある時はビデオ信号検出回路１
３がその旨を検出し、同様に検出出力で表示回路１４を
駆動し、発光素子を点灯させてビデオ信号があることを
表示する。したがって、表示回路５．１４’ｉみること
で、各ビデオ信号の有無を確認することができる。10,000, when there is a TV broadcast, the video signal detection circuit 4
It detects this and drives the display circuit 5 with the detection output that changes from "L" level to "H" level, for example, lights up a light emitting element to display that there is a TV broadcast. When there is a signal, video signal detection circuit 1
3 detects this, and similarly drives the display circuit 14 with the detection output to light the light emitting element to display the presence of the video signal. Therefore, by looking at the display circuit 5.14'i, the presence or absence of each video signal can be confirmed.
発明の効果
以上のように本発明によれば、テレビ放送、ビデオ信号
の有無がそれぞれ表示されるため、たとえばＶＴＲ使用
時、その再生ビデオ信号がテレビに入力されてから、テ
レビをビデオ側に切換えることが出来るため、テレビを
有効に見ることが出来るものセある。Effects of the Invention As described above, according to the present invention, the presence or absence of television broadcasting and video signals is displayed, so that when using a VTR, for example, the television can be switched to the video side after the reproduced video signal is input to the television. There are some things that allow you to watch TV effectively.
第１図は本発明の一実施例におけるテレビジョン受像機
のブロック図、第２図は従来例のテレビジョン受像機の
ブロック図である。
１・・・・・・アンテナ、２・・・・・・チューナー、
３・・・・・・ＶＩＦ回路、４・・・・・・ビデオ信号
検出回路、６・・・・・・表示回路、６・・・・・・ス
イッチ、１０・・・・・・カラー復調回路、１１・・・
・・・ＣＲＴ、１２・・・・・・ビデオ入力端子、１３
・・・・・・ビデオ信号検出回路、１４・・・・・・表
示回路。FIG. 1 is a block diagram of a television receiver according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional television receiver. 1... Antenna, 2... Tuner,
3...VIF circuit, 4...Video signal detection circuit, 6...Display circuit, 6...Switch, 10...Color demodulation Circuit, 11...
...CRT, 12...Video input terminal, 13
. . . Video signal detection circuit, 14 . . . Display circuit.
Claims (1)
信号の有無を検出する第１のビデオ信号検出器と、アン
テナから得たビデオ信号の有無を検出する第２のビデオ
信号検出器と、第１、第２のビデオ信号検出器の検出出
力で動作する第１、第２の表示回路とを備えたテレビジ
ョン受像機。a first video signal detector for detecting the presence or absence of a video signal applied to the video input terminal; a second video signal detector for detecting the presence or absence of a video signal obtained from the antenna; A television receiver comprising first and second display circuits that operate on the detection output of a second video signal detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6633187A JPS63232769A (en) | 1987-03-20 | 1987-03-20 | Television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6633187A JPS63232769A (en) | 1987-03-20 | 1987-03-20 | Television receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63232769A true JPS63232769A (en) | 1988-09-28 |
Family
ID=13312756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6633187A Pending JPS63232769A (en) | 1987-03-20 | 1987-03-20 | Television receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63232769A (en) |
-
1987
- 1987-03-20 JP JP6633187A patent/JPS63232769A/en active Pending
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