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JPS644127A - Space light transmission equipment - Google Patents

Space light transmission equipment

Info

Publication number
JPS644127A
JPS644127A JP62158896A JP15889687A JPS644127A JP S644127 A JPS644127 A JP S644127A JP 62158896 A JP62158896 A JP 62158896A JP 15889687 A JP15889687 A JP 15889687A JP S644127 A JPS644127 A JP S644127A
Authority
JP
Japan
Prior art keywords
liquid crystal
data signal
light
spatial optical
light source
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
JP62158896A
Other languages
Japanese (ja)
Inventor
Kouichi Shiratama
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP62158896A priority Critical patent/JPS644127A/en
Publication of JPS644127A publication Critical patent/JPS644127A/en
Pending legal-status Critical Current

Links

Landscapes

  • Liquid Crystal (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To build up an economical and practical spatial optical communication system by adopting the constitution so that a light source for lighting is utilized for the light source of a spatial optical transmitter. CONSTITUTION:A data signal 4 inputted to a liquid crystal drive circuit 2 exter nally in a spatial optical transmitter 10 modulates a driving signal of a liquid crystal 3. The modulated driving signal is fed to the liquid crystal 3 and the on/off of the liquid crystal 3, that is, the transmittivity of the liquid crystal 3 is switched in response to the data signal 4. Thus, a consecutive light 5 project ed from a light source 1 for the lighting or the like is subject to intensity modu lation when it transmits through the liquid crystal 3, and extracted as a modulat ed light 6 in response to the data signal 4. The modulated light 6 outputted from the spatial optical transmitter 10 is received by plural optical receivers 8. The data signal is demodulated by the optical receivers 8.
JP62158896A 1987-06-26 1987-06-26 Space light transmission equipment Pending JPS644127A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62158896A JPS644127A (en) 1987-06-26 1987-06-26 Space light transmission equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62158896A JPS644127A (en) 1987-06-26 1987-06-26 Space light transmission equipment

Publications (1)

Publication Number Publication Date
JPS644127A true JPS644127A (en) 1989-01-09

Family

ID=15681739

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62158896A Pending JPS644127A (en) 1987-06-26 1987-06-26 Space light transmission equipment

Country Status (1)

Country Link
JP (1) JPS644127A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005277809A (en) * 2004-03-25 2005-10-06 Kddi Corp Illumination light communication system, illumination light modulation device, and reception device
WO2015125179A1 (en) * 2014-02-19 2015-08-27 パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ Transmitter, transmission method and receiving method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005277809A (en) * 2004-03-25 2005-10-06 Kddi Corp Illumination light communication system, illumination light modulation device, and reception device
WO2015125179A1 (en) * 2014-02-19 2015-08-27 パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ Transmitter, transmission method and receiving method
US9377639B2 (en) 2014-02-19 2016-06-28 Panasonic Intellectual Property Corporation Of America Transmitter and transmitting method
US9377638B2 (en) 2014-02-19 2016-06-28 Panasonic Intellectual Property Corporation Of America Transmitter, transmitting method, and receiving method
JPWO2015125180A1 (en) * 2014-02-19 2017-03-30 パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカＰａｎａｓｏｎｉｃ Ｉｎｔｅｌｌｅｃｔｕａｌ Ｐｒｏｐｅｒｔｙ Ｃｏｒｐｏｒａｔｉｏｎ ｏｆ Ａｍｅｒｉｃａ Transmitter and transmission method
JPWO2015125179A1 (en) * 2014-02-19 2017-03-30 パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカＰａｎａｓｏｎｉｃ Ｉｎｔｅｌｌｅｃｔｕａｌ Ｐｒｏｐｅｒｔｙ Ｃｏｒｐｏｒａｔｉｏｎ ｏｆ Ａｍｅｒｉｃａ Transmitter, transmission method and reception method
US9791727B2 (en) 2014-02-19 2017-10-17 Panasonic Intellectual Property Corporation Of America Transmitter, transmitting method, and receiving method
US10419115B2 (en) 2014-02-19 2019-09-17 Panasonic Intellectual Property Corporation Of America Transmitter, transmitting method, and receiving method

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