KR790000801B1 - Brightness control equimpment by magnetic-hydraulics - Google Patents
Brightness control equimpment by magnetic-hydraulicsInfo
- 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
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.
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)
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 |
-
1974
- 1974-01-04 KR KR7400720A patent/KR790000801B1/en active
Cited By (1)
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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