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Patent Searching and Data


Title:
LIGHTING DEVICE OF CLOCK
Document Type and Number:
Japanese Patent JP2006322913
Kind Code:
A
Abstract:

To provide a lighting device for a time indication panel of a clock, which can be prepared for a digital clock or can additionally be installed in an existing clock and is excellent in electric power saving nature.

The lighting device of the clock includes a magnet drive unit, a magnetic detector, a light intensity detector, a splicing switch, and a luminescent drive unit. The magnet drive unit has a circumference moving magnet to output the magnetic detection signal, when the magnet reaches a magnetometric sensor position in the magnetic detector. Further, the unit outputs an optical sensor for the light intensity detector, and a darkness detection signal. The connecting switch makes turning on electricity splicing of the splicing switch at a luminescent drive with the magnetic detection signal and the darkness detection signal. The illuminant drive unit lights the illuminant charging capacitor when turning ON of the splicing switch, and the illuminant is made into the lighting device of the clock made to light until the charging current of the condenser is lost when turning OFF of the splicing switch.


Inventors:
SAKATA YUUJI
Application Number:
JP2005260303A
Publication Date:
November 30, 2006
Filing Date:
September 08, 2005
Export Citation:
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Assignee:
SAKATA YUUJI
International Classes:
G04G9/00; G04C23/40
Attorney, Agent or Firm:
Kaichi Otani