Title:
NON-SUNSHINE ACCOMMODATING SPONTANEOUS EMISSION DEVICE
Document Type and Number:
Japanese Patent JP3774841
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a spontaneous emission device which can prevent break in lighting during night due to non-sunshine and may be provided even at such a place that a shield screening sunlight is present.
SOLUTION: A secondary cell 4 is so constructed that it is charged by at least a primary cell charging circuit part 50 when the terminal voltage of the secondary cell 4 is lowered to a prescribed value while a day-night judging circuit part 80 judges it to be a day, and a driving current is supplied to a phosphor 6 through an emission circuit part 20 from the secondary cell 4 while the day-night judging circuit part 80 judges it to be a night.
Inventors:
Toshihiko Ogawa
Kunio Takai
Kunio Takai
Application Number:
JP2000234879A
Publication Date:
May 17, 2006
Filing Date:
August 02, 2000
Export Citation:
Assignee:
Kikutec Co., Ltd.
International Classes:
H05B37/02; E01F9/553; E01F9/559; E01F9/576; E01F9/582; F21S2/00; F21S9/02; F21S9/03; G09F13/20; G09F19/22; H02J7/35; (IPC1-7): H05B37/02; E01F9/04; F21S2/00; F21S9/02; G09F13/20; G09F19/22; H02J7/35
Domestic Patent References:
| JP4017410U | ||||
| JP11269829A | ||||
| JP11232914A | ||||
| JP4073802A | ||||
| JP7306650A |
Attorney, Agent or Firm:
Akio Iida