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Illumination system

  • US 8,896,216 B2
  • Filed: 01/05/2012
  • Issued: 11/25/2014
  • Est. Priority Date: 06/28/2005
  • Status: Active Grant
First Claim
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1. An illumination system, comprising:

  • a plurality of light emitting devices arranged in an area and spaced apart from each other, each light emitting device comprising a plurality of light emitting diode arrays each comprising one light emitting diode or a plurality of light emitting diodes connected in series, the numbers of light emitting diodes in each light emitting diode array being different from the number of light emitting diodes in each other light emitting diode array; and

    a controller configured to establish one or more groups, each group comprising one or more of the light emitting devices, and the controller is configured to adjust an illumination state of a selected group of the one or more groups by adjusting the illumination state of each light emitting device in the selected group by controlling a driving state of the light emitting diode arrays included in each light emitting device of the selected group,wherein;

    the area is a space elongated in a lengthwise direction;

    the controller establishes the groups by grouping the light emitting devices along the lengthwise direction;

    the controller is configured to determine the number of light emitting devices included in each group based on sensing information; and

    the sensing information comprises at least one of brightness information of the area, brightness information of outside the area, speed information of an object moving in the area, moving direction information of the object, time information, position information of the object, and position information of the light emitting devices.

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