JPS5652945A - Data transmission device - Google Patents

Data transmission device

Info

Publication number
JPS5652945A
JPS5652945A JP12856979A JP12856979A JPS5652945A JP S5652945 A JPS5652945 A JP S5652945A JP 12856979 A JP12856979 A JP 12856979A JP 12856979 A JP12856979 A JP 12856979A JP S5652945 A JPS5652945 A JP S5652945A
Authority
JP
Japan
Prior art keywords
data
peripheral equipment
photodetector
light
computer
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
JP12856979A
Other languages
Japanese (ja)
Inventor
Shuichi Inose
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP12856979A priority Critical patent/JPS5652945A/en
Publication of JPS5652945A publication Critical patent/JPS5652945A/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)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To make the peripheral equipment small-sized and light weight, by photoelectrically coupling the computer and the peripheral equipment, and removing the connector, etc. CONSTITUTION:A light emitting element 13 and a photodetector 16 are provided on the computer body, and an element 7 which is able to control reflection or transmission of a light beam, and a photodetector 19 are provided in the peripheral equipment. And in case a data is sent from the computer to the peripheral equipment, the data is supplied to the terminal S3, the light emitting element 13 is flashed and controlled by the transistor 14, and the data is sent out to the photodetector 19 through the element 7. On the contrary, in case a data is sent from the peripheral equipment to the computer side, the stationary light S5 emitted from the light emitting element 13 is modulated to a light pulse S6 and is received by the photodetector 16, by varying the reflection factor of the element 7 by the data supplied to the terminal A.
JP12856979A 1979-10-05 1979-10-05 Data transmission device Pending JPS5652945A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12856979A JPS5652945A (en) 1979-10-05 1979-10-05 Data transmission device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12856979A JPS5652945A (en) 1979-10-05 1979-10-05 Data transmission device

Publications (1)

Publication Number Publication Date
JPS5652945A true JPS5652945A (en) 1981-05-12

Family

ID=14987989

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12856979A Pending JPS5652945A (en) 1979-10-05 1979-10-05 Data transmission device

Country Status (1)

Country Link
JP (1) JPS5652945A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58156565A (en) * 1982-03-11 1983-09-17 河原工業株式会社 Pavement material comprising volcanic ash as main component
JPS63206503A (en) * 1987-02-20 1988-08-25 シンレキ工業株式会社 Binder for pot hole ambient temperature repairing material and pot hole ambient temperature repairing material
JPH02214233A (en) * 1989-02-14 1990-08-27 Tokyo Gas Co Ltd Communication equipment using magnetism and light

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58156565A (en) * 1982-03-11 1983-09-17 河原工業株式会社 Pavement material comprising volcanic ash as main component
JPS63206503A (en) * 1987-02-20 1988-08-25 シンレキ工業株式会社 Binder for pot hole ambient temperature repairing material and pot hole ambient temperature repairing material
JPH0548323B2 (en) * 1987-02-20 1993-07-21 Shinreki Kogyo Kk
JPH02214233A (en) * 1989-02-14 1990-08-27 Tokyo Gas Co Ltd Communication equipment using magnetism and light

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