The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 06, 2018
Filed:
Jan. 31, 2011
Robertus Leonardus Tousain, Eindhoven, NL;
Jan-ivo Blankestijn, Best, NL;
Bertrand Johan Edward Hontele, Breda, NL;
Robertus Leonardus Tousain, Eindhoven, NL;
Jan-Ivo Blankestijn, Best, NL;
Bertrand Johan Edward Hontele, Breda, NL;
PHILIPS LIGHTING HOLDING B.V., Eindhoven, NL;
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.