JPS5474303A - Photo transfer wireless interphone - Google Patents

Photo transfer wireless interphone

Info

Publication number
JPS5474303A
JPS5474303A JP14180177A JP14180177A JPS5474303A JP S5474303 A JPS5474303 A JP S5474303A JP 14180177 A JP14180177 A JP 14180177A JP 14180177 A JP14180177 A JP 14180177A JP S5474303 A JPS5474303 A JP S5474303A
Authority
JP
Japan
Prior art keywords
unit
sound
transferred
light
light emitting
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
JP14180177A
Other languages
Japanese (ja)
Inventor
Toshio Abiko
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 Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP14180177A priority Critical patent/JPS5474303A/en
Publication of JPS5474303A publication Critical patent/JPS5474303A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114—Indoor or close-range type systems

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To eliminate radio interference of a photo transfer wireless interphone, by receiving the output of a light emitting part, whose luminous level or frequency varies with a sound, by the light receiving part of the other wireless unit. CONSTITUTION:Light emitting part 2 of one unit 1 sends out its liminous output corresponding to a sound and, the output is received by control unit 9 and converted into an electric signal, which is transferred to the other control unit 9 via transfer method 12. In this unit 9, it is converted into a photo signal; light emitted from light emitting part 2', on the other hand, is received by the light receiving part of the other unit 1 and transferred to speaker 8 of hand kit 4 via driver circuit 7. Consequently, a sound can be transferred through the diffused reflection of light even if a body interposing between unit 1 and control unit 9 makes it shade.
JP14180177A 1977-11-25 1977-11-25 Photo transfer wireless interphone Pending JPS5474303A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14180177A JPS5474303A (en) 1977-11-25 1977-11-25 Photo transfer wireless interphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14180177A JPS5474303A (en) 1977-11-25 1977-11-25 Photo transfer wireless interphone

Publications (1)

Publication Number Publication Date
JPS5474303A true JPS5474303A (en) 1979-06-14

Family

ID=15300442

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14180177A Pending JPS5474303A (en) 1977-11-25 1977-11-25 Photo transfer wireless interphone

Country Status (1)

Country Link
JP (1) JPS5474303A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5665000U (en) * 1979-10-25 1981-05-30
JPS5745744A (en) * 1980-07-01 1982-03-15 Plantronics Communication device
JPS58125923A (en) * 1981-12-29 1983-07-27 Matsushita Electric Works Ltd Light transmitting system
JPS59132261U (en) * 1983-02-21 1984-09-05 日本マランツ株式会社 remote control system
JPH02299330A (en) * 1989-03-20 1990-12-11 Hm Electron Inc Light wavelength communication equipment and method for utilizing the same

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5665000U (en) * 1979-10-25 1981-05-30
JPS5931680Y2 (en) * 1979-10-25 1984-09-06 愛知車輛株式会社 Work platform power supply for aerial work vehicles
JPS5745744A (en) * 1980-07-01 1982-03-15 Plantronics Communication device
JPS58125923A (en) * 1981-12-29 1983-07-27 Matsushita Electric Works Ltd Light transmitting system
JPS6212704B2 (en) * 1981-12-29 1987-03-20 Matsushita Electric Works Ltd
JPS59132261U (en) * 1983-02-21 1984-09-05 日本マランツ株式会社 remote control system
JPH02299330A (en) * 1989-03-20 1990-12-11 Hm Electron Inc Light wavelength communication equipment and method for utilizing the same

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