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US 10,542,221 B2Granted
Light-based communication using camera frame-rate based light modulation
AssigneeOSRAMS SYLVANIA Inc.
InventorsBarry Stout, Bernhard Siessegger, Christian Breuer, Yang Li
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Abstract
A method of Light-based Communication (LCom) using camera frame-rate based light modulation is provided. The method includes receiving light having modulated light properties that vary at a first frequency from a LCom-enabled luminaire by an image capture device using a global shutter image capture process, comparing light properties received at the image capture device over sequential image capture instances, and determining, from the compared light properties, data encoded by the modulated light.
Claims19
A method of Light-based Communication (LCom) using camera frame-rate based light modulation, the method comprising:
- determining, by a computing device, an encoding scheme used by one or more LCom-enabled luminaires to transmit data to the computing device via modulated light, wherein the encoding scheme comprises at least one of encoding data as absolute values of a light intensity level of light and encoding data as absolute values of a light hue of the light;
- transmitting, by the computing device, a synchronization command to the one or more LCom-enabled luminaires, wherein the synchronization command synchronizes at least one parameter of a global shutter image capture process;
- receiving, at the computing device from the one or more LCom-enabled luminaires using the determined encoding scheme, modulated light having light properties that vary at a first frequency using the global shutter image capture process of an image capture device on the computing device;
- comparing, by the computing device, light properties received by the image capture device over sequential image capture instances;
- and
- determining, by the computing device, data encoded by the modulated light based on the compared light properties over the sequential image capture instances.
3 more elements
A computing device, comprising:
- an image capture device configured to receive using a global shutter image capture process, from one or more LCom-enabled luminaires, light modulated according to an encoding scheme, wherein the light has light properties that vary at a first frequency;
- and
- a processor coupled to the image capture device and configured to:
- determine the encoding scheme used by the one or more LCom-enabled luminaires to transmit data to the computing device, wherein the encoding scheme comprises at least one of encoding data as absolute values of a light intensity level of light and encoding data as absolute values of a light hue of the light;
- transmit a synchronization command to the one or more LCom-enabled luminaires, wherein the synchronization command synchronizes at least one parameter of the global shutter image capture process;
- compare light properties received by the image capture device over sequential image capture instances;
- and
- determine data encoded by the modulated light based on the compared light properties over the sequential image capture instances.
5 more elements
A lighting system, comprising:
- a LCom-enabled luminaire having a solid-state light source configured to encode data according to an encoding scheme by emitting modulated light having light properties that vary at a first frequency, and
- a computing device, comprising:
- an image capture device configured to receive, from the LCom-enabled luminaire, the modulated light using a global shutter image capture process;
- and
- a processor coupled to the image capture device and configured to:
- determine the encoding scheme used by the LCom-enabled luminaire, wherein the encoding scheme comprises at least one of encoding data as absolute values of a light intensity level of light and encoding data as absolute values of a light hue of the light;
- transmit a synchronization command to the LCom-enabled luminaire, wherein the synchronization command synchronizes at least one parameter of the global shutter image capture process;
- compare light properties received by the image capture device over sequential image capture instances;
- and
- determine data encoded by the modulated light based on the compared light properties over the sequential image capture instances.
7 more elements
Dependencies are inferred from the claim text.