JPS57142090A - Signal switching and displaying device - Google Patents

Signal switching and displaying device

Info

Publication number
JPS57142090A
JPS57142090A JP56028030A JP2803081A JPS57142090A JP S57142090 A JPS57142090 A JP S57142090A JP 56028030 A JP56028030 A JP 56028030A JP 2803081 A JP2803081 A JP 2803081A JP S57142090 A JPS57142090 A JP S57142090A
Authority
JP
Japan
Prior art keywords
switching
circuit
signal
displaying device
distributors
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.)
Granted
Application number
JP56028030A
Other languages
Japanese (ja)
Other versions
JPS6339192B2 (en
Inventor
Koji Ishikawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP56028030A priority Critical patent/JPS57142090A/en
Publication of JPS57142090A publication Critical patent/JPS57142090A/en
Publication of JPS6339192B2 publication Critical patent/JPS6339192B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Studio Circuits (AREA)

Abstract

PURPOSE:To prevent malfunction due to noise surely in any signal detecting circuit and to make switching operation stable, by providing a logic control circuit, a signal detecting circuit and a distributor with a signal switching and displaying device. CONSTITUTION:Distributors 3 and 19 are connected to an input terminal 1 of a signal switching and displaying device and to an input terminal 2 to which a different input signal from the terminal 1 is applied, and one of output sides of the distributors 3 and 19 is connected with contacts a and b of a relay 9. Another of the output side of the distributors 3 and 19 is connected with signal detecting circuits 7 and 11, a logic control circuit 13 is connected to the output side of the circuits 7 and 11, and display elements 14-18 are connected to the circuit 13. Further, to the output side of the circuit 7, a transistor 8 driving the relay 9 and a switching relay 12 switching and the of the circuit 13 are connected. Malfunction of the detecting circuits 7 and 11 is surely prevented against the input signal from the input terminals 1 and 2, allowing the device to be suited for video and audio switching and displaying device of an exclusive use TV or cable TV.
JP56028030A 1981-02-26 1981-02-26 Signal switching and displaying device Granted JPS57142090A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56028030A JPS57142090A (en) 1981-02-26 1981-02-26 Signal switching and displaying device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56028030A JPS57142090A (en) 1981-02-26 1981-02-26 Signal switching and displaying device

Publications (2)

Publication Number Publication Date
JPS57142090A true JPS57142090A (en) 1982-09-02
JPS6339192B2 JPS6339192B2 (en) 1988-08-03

Family

ID=12237339

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56028030A Granted JPS57142090A (en) 1981-02-26 1981-02-26 Signal switching and displaying device

Country Status (1)

Country Link
JP (1) JPS57142090A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5422668A (en) * 1993-01-13 1995-06-06 U.S. Philips Corporation Television signal switching device for a cable distribution system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5422668A (en) * 1993-01-13 1995-06-06 U.S. Philips Corporation Television signal switching device for a cable distribution system

Also Published As

Publication number Publication date
JPS6339192B2 (en) 1988-08-03

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