Title:
AUTO SWITCHING CIRCUIT FOUNDED ON ILLUMINANCE
Document Type and Number:
WIPO Patent Application WO/2004/047501
Kind Code:
A1
Abstract:
The present invention relates to an automatic power switching circuit using light. The automatic power switching circuit includes an illuminance detecting unit for detecting illuminance according to the indoor brightness, a comparing unit for comparing a current output from the illuminance detecting unit with a current output through an input terminal, an amplifying unit for amplifying a current output from the comparing unit, a switching unit for controlling bidirectional currents output from a power supply terminal and the amplifying unit, and a rectifying circuit unit for converting an AC current supplied from the power supply into a DC current. The present invention is advantageous in that it switches off the power of outlets or power bars so as not to provide electricity to electrical and electronic appliances when indoor illuminance becomes low, and switches on the power thereof when the indoor illuminance becomes high.
Inventors:
CHOI JIN-YOUNG (KR)
Application Number:
PCT/KR2003/002508
Publication Date:
June 03, 2004
Filing Date:
November 20, 2003
Export Citation:
Assignee:
CHOI JIN-YOUNG (KR)
International Classes:
H05B37/02; H03K17/94; (IPC1-7): H05B37/02
Foreign References:
| KR970078759A | 1997-12-12 | |||
| KR19980036984U | 1998-09-15 | |||
| JPS60189763A | 1985-09-27 |
Attorney, Agent or Firm:
Yang, Kwang-nam (648-1 Yeoksam-don, Gangnam-gu 135-080 Seoul, KR)
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