METHOD OF VISIBLE LIGHT COMMUNICATION USING ILLUMINANCE SENSOR AND MOBILE COMMUNICATION TERMINAL FOR THE SAME
First Claim
1. A mobile communication terminal configured to perform a visible light communication, the mobile communication terminal comprising:
- an illuminance sensor configured to;
receive an optical signal, convert the optical signal to an electrical signal, and output the converted electrical signal; and
anda controller configured to;
control the illuminance sensor to operate in one of a visible light communication mode and a illuminance measurement mode based on the signal output from the illuminance sensor.
1 Assignment
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Accused Products
Abstract
According to one embodiment, a photo detector-combined illuminance sensor includes a circuit for a Photo Detector (PD) function to detect the illuminance of the ambient environment. The illuminance sensor operates under the control of a controller in a visible light communication terminal. When an optical signal detected by the illuminance sensor is a visible light communication signal, the controller switches to cause the illuminance sensor to operate as the photo detector for the visible light communication in a visible light communication mode.
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Citations
20 Claims
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1. A mobile communication terminal configured to perform a visible light communication, the mobile communication terminal comprising:
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an illuminance sensor configured to; receive an optical signal, convert the optical signal to an electrical signal, and output the converted electrical signal; and and a controller configured to; control the illuminance sensor to operate in one of a visible light communication mode and a illuminance measurement mode based on the signal output from the illuminance sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for visible light communication by a mobile communication terminal comprising an illuminance sensor, the method comprising:
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demodulating a signal outputted from the illuminance sensor to data based on a visible light communication scheme in a visible light communication mode; determining whether the output signal corresponds to a visible light communication signal by using the demodulated data; and when the output signal does not correspond to a visible light communication signal, switching the visible light communication mode into an illuminance measurement mode for measuring an illuminance by the illuminance sensor. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A wireless device comprising:
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an illuminance sensor configured to; receive an optical signal and convert the optical signal to an electrical signal; amplify, filter, and output the converted electrical signal when the mobile communication terminal is in a visible light communication mode; and measure an illuminance by using the converted electrical signal and then output the measured illuminance when the mobile communication terminal is in an illuminance measurement mode; and a controller configured to; determine whether a signal output from the illuminance sensor includes a visible light communication signal; and control the illuminance sensor to measure an illuminance when the signal output from the illuminance sensor is not a visible light communication signal. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification