Title:
LIGHTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/008262
Kind Code:
A1
Abstract:
A lighting device configured in such a manner that the excessive adjustment of the brightness is prevented even if there is external light. A mounting adaptor (63) is engaged with a ceiling engagement section (62) provided to a ceiling. A lighting device can be mounted to the ceiling by engaging the mounting adaptor (63) with any one of a first ring member (6) and a second ring member (60) which are affixed to a chassis (1). A sensor board (53) on which an illuminance sensor (52) is mounted is connected to a circuit board (5). The illuminance sensor (52) outputs an electric signal corresponding to the illuminance which the illuminance sensor (52) detects. A control unit adjusts, according to the illuminance detected by the illuminance sensor (52), the brightness of the light emitted from an LED module. The illuminance sensor (52) is affixed to the chassis (1) while being tilted relative to a pivot shaft about which the chassis (1) pivots.
Inventors:
HIRAOKA JUN
UEDA KEN
SATOU TSUTOMU
UEDA KEN
SATOU TSUTOMU
Application Number:
PCT/JP2011/063775
Publication Date:
January 19, 2012
Filing Date:
June 16, 2011
Export Citation:
Assignee:
SHARP KK (JP)
HIRAOKA JUN
UEDA KEN
SATOU TSUTOMU
HIRAOKA JUN
UEDA KEN
SATOU TSUTOMU
International Classes:
F21V23/00; F21S2/00; F21S8/04; F21V3/02; F21V17/00; F21V29/00; H05B37/02; H05B44/00; F21Y101/02
Foreign References:
| JP2010073611A | 2010-04-02 | |||
| JPH1125723A | 1999-01-29 | |||
| JP2010097899A | 2010-04-30 | |||
| JPH09145472A | 1997-06-06 | |||
| JP2010073610A | 2010-04-02 |
Other References:
See also references of EP 2594846A4
Attorney, Agent or Firm:
KOHNO, Takao (JP)
Takao Kono (JP)
Takao Kono (JP)
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Claims:
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