Content delivery based on a light positioning system
First Claim
1. A method of recovering information encoded in modulated light emitted by a light source, the method comprising:
- acquiring an image at least partially illuminated by light emitted by the light source, the light source emitting a light output modulated in accordance with a time-varying signal so as to vary over time, different portions of the image being acquired at different times over a time interval, whereby the acquired image comprises a pattern of distortions resulting from interaction between the time-varying light output and the time interval of acquisition; and
decoding the pattern of distortions to recover the information encoded in the modulated light.
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Accused Products
Abstract
Systems an methods are provided that disclose providing a positioning service for devices based on light received from one or more light sources. This light based positioning service uses light information transmitted by each light source to determine the position of the device. The positioning information can include three dimension position information in a building that can then be used to deliver services and information to a mobile device. The content delivered to a mobile device can include multimedia, text, audio, and/or pictorial information. The positioning information along with other location or positioning information can be used in providing augmented reality or location aware services. The light sources can be independent beacons that broadcast information in visible light at a rate that is undetectable by the human eye. Content can be retrieved from a server over a communications connection.
153 Citations
26 Claims
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1. A method of recovering information encoded in modulated light emitted by a light source, the method comprising:
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acquiring an image at least partially illuminated by light emitted by the light source, the light source emitting a light output modulated in accordance with a time-varying signal so as to vary over time, different portions of the image being acquired at different times over a time interval, whereby the acquired image comprises a pattern of distortions resulting from interaction between the time-varying light output and the time interval of acquisition; and decoding the pattern of distortions to recover the information encoded in the modulated light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A device for recovering information encoded in modulated light emitted by a light source, the light source emitting a light output modulated in accordance with a time-varying signal so as to vary over time, the device comprising:
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an image sensor configured to acquire an image at least partially illuminated by light emitted by the light source, different portions of the image being acquired at different times over a time interval, whereby the acquired image comprises a pattern of distortions resulting from interaction between the time-varying light output and the time interval of acquisition; and a processor for decoding the pattern of distortions to recover the information encoded in the modulated light. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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Specification