KR790000801B1 - Brightness control equimpment by magnetic-hydraulics - Google Patents

Brightness control equimpment by magnetic-hydraulics

Info

Publication number
KR790000801B1
KR790000801B1 KR7400720A KR740000720A KR790000801B1 KR 790000801 B1 KR790000801 B1 KR 790000801B1 KR 7400720 A KR7400720 A KR 7400720A KR 740000720 A KR740000720 A KR 740000720A KR 790000801 B1 KR790000801 B1 KR 790000801B1
Authority
KR
South Korea
Prior art keywords
magnetic
equimpment
hydraulics
brightness control
magnetic fluid
Prior art date
Application number
KR7400720A
Other languages
Korean (ko)
Inventor
Hirosi Iwada
Original Assignee
Cesdo Denki 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 Cesdo Denki Co Ltd filed Critical Cesdo Denki Co Ltd
Priority to KR7400720A priority Critical patent/KR790000801B1/en
Application granted granted Critical
Publication of KR790000801B1 publication Critical patent/KR790000801B1/en

Links

Abstract

A light control device was manufd. wherein a magnetic fluid consisting of a colloidal solution prepared by mixing together a powered activated magnetic material and oleic acid, heptane or the like and a substance such as glycerin or silicone oil, is placed within a hermetically sealed container, and the position of the magnetic fluid is controlled by the inposition of an external magnetic field to transmit and intercept light.
KR7400720A 1974-01-04 1974-01-04 Brightness control equimpment by magnetic-hydraulics KR790000801B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR7400720A KR790000801B1 (en) 1974-01-04 1974-01-04 Brightness control equimpment by magnetic-hydraulics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR7400720A KR790000801B1 (en) 1974-01-04 1974-01-04 Brightness control equimpment by magnetic-hydraulics

Publications (1)

Publication Number Publication Date
KR790000801B1 true KR790000801B1 (en) 1979-06-30

Family

ID=19199354

Family Applications (1)

Application Number Title Priority Date Filing Date
KR7400720A KR790000801B1 (en) 1974-01-04 1974-01-04 Brightness control equimpment by magnetic-hydraulics

Country Status (1)

Country Link
KR (1) KR790000801B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100738067B1 (en) * 2004-04-28 2007-07-10 삼성전자주식회사 Optical shutter and light scanning unit employing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100738067B1 (en) * 2004-04-28 2007-07-10 삼성전자주식회사 Optical shutter and light scanning unit employing the same

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