JPS55115778A - Simple introduction system of video projector - Google Patents

Simple introduction system of video projector

Info

Publication number
JPS55115778A
JPS55115778A JP2264879A JP2264879A JPS55115778A JP S55115778 A JPS55115778 A JP S55115778A JP 2264879 A JP2264879 A JP 2264879A JP 2264879 A JP2264879 A JP 2264879A JP S55115778 A JPS55115778 A JP S55115778A
Authority
JP
Japan
Prior art keywords
signal
video
projector
people
transmitter
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
Application number
JP2264879A
Other languages
Japanese (ja)
Inventor
Hideaki Takehana
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.)
Micron Kiki Co Ltd
Original Assignee
Micron Kiki 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 Micron Kiki Co Ltd filed Critical Micron Kiki Co Ltd
Priority to JP2264879A priority Critical patent/JPS55115778A/en
Publication of JPS55115778A publication Critical patent/JPS55115778A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Closed-Circuit Television Systems (AREA)

Abstract

PURPOSE:To eliminate nuisance sound to people, by projecting the video signal as video with video projector, radiating the audio signal with the transmitter in space as electromagnetic waves, and enabling the hearing only to desired people with the receiver and the ear-phone. CONSTITUTION:In the video projector in which audio can be listened only with the receiver, the signal generator V produces the video signal a and audio signal b, and the input selection switch S supplies the signal a to the video projector P and the signal b to the transmitter T. Further, the projector P projects the signal a as video, the transmitter T modulates the signal b and radiates it into space as electromagnetic waves. On the other hand, this is received with the receivers R1, R2 and demodulated into audio signal and heard individually with the ear-phone Re. Accordingly, while directly viewing the picture projected on the projector P, audio signal is listened only by people who desire, eliminating the nuisance sound to the other people.
JP2264879A 1979-02-28 1979-02-28 Simple introduction system of video projector Pending JPS55115778A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2264879A JPS55115778A (en) 1979-02-28 1979-02-28 Simple introduction system of video projector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2264879A JPS55115778A (en) 1979-02-28 1979-02-28 Simple introduction system of video projector

Publications (1)

Publication Number Publication Date
JPS55115778A true JPS55115778A (en) 1980-09-05

Family

ID=12088661

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2264879A Pending JPS55115778A (en) 1979-02-28 1979-02-28 Simple introduction system of video projector

Country Status (1)

Country Link
JP (1) JPS55115778A (en)

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