Title:
ENERGY MANAGEMENT CONTROL FOR SOLAR-POWERED LIGHTING DEVICES
Document Type and Number:
WIPO Patent Application WO/2011/095922
Kind Code:
A3
Abstract:
This invention relates to a method of controlling the light output of a solar- powered lighting device. The lighting device comprises a light source, a battery connected to the light source, a solar-power generator including a charger connected to the battery, and a control unit for performing the light output control. The method comprises: - charging the battery while solar-power is generated; - acquiring local day-light data; - repeatedly: - acquiring, at predetermined time intervals, local weather forecast data covering a predetermined time period, and determining a lighting output profile for the predetermined time period; and - driving the lighting device according to the lighting output profile, wherein said determining a lighting output profile comprises: - predicting a lighting demand for the predetermined time period on basis of first environment light data, which first environment light data comprises the local day-light data; - predicting a battery capacity for the predetermined time period on basis of a present energy storage level and second environment light data, which second environment light data comprises the weather forecast data and the local day-light data; and - determining the lighting output profile on basis of the lighting demand and the battery capacity under consideration of keeping the energy storage level above a predetermined minimum level during the predetermined time period.
Inventors:
TOUSAIN ROBERTUS LEONARDUS (NL)
BLANKESTIJN JAN-IVO (NL)
HONTELE BERTRAND JOHAN EDWARD (NL)
BLANKESTIJN JAN-IVO (NL)
HONTELE BERTRAND JOHAN EDWARD (NL)
Application Number:
PCT/IB2011/050408
Publication Date:
June 14, 2012
Filing Date:
January 31, 2011
Export Citation:
Assignee:
KONINKL PHILIPS ELECTRONICS NV (NL)
TOUSAIN ROBERTUS LEONARDUS (NL)
BLANKESTIJN JAN-IVO (NL)
HONTELE BERTRAND JOHAN EDWARD (NL)
TOUSAIN ROBERTUS LEONARDUS (NL)
BLANKESTIJN JAN-IVO (NL)
HONTELE BERTRAND JOHAN EDWARD (NL)
International Classes:
H02J7/00; H05B37/00
Foreign References:
| US6346670B1 | 2002-02-12 | |||
| US20090316392A1 | 2009-12-24 | |||
| US4636931A | 1987-01-13 | |||
| US20020053879A1 | 2002-05-09 | |||
| US20090129067A1 | 2009-05-21 | |||
| US20080266846A1 | 2008-10-30 | |||
| JPH04200245A | 1992-07-21 | |||
| JP2008148442A | 2008-06-26 | |||
| US20090302681A1 | 2009-12-10 |
Attorney, Agent or Firm:
BEKKERS, Joost, J., J. et al. (Building 44, AE Eindhoven, NL)
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