Method of visible light communication using illuminance sensor and mobile communication terminal for the same
First Claim
Patent Images
1. A terminal configured to perform a visible light communication, the terminal comprising:
- a light receiving element configured to;
receive an optical signal,convert the optical signal to an electrical signal, andoutput the converted electrical signal; and
a controller configured to;
control the terminal to operate in one of a visible light communication mode and a illuminance measurement mode based on the signal output from the light receiving element.
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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 terminal configured to perform a visible light communication, the terminal comprising:
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a light receiving element configured to; receive an optical signal, convert the optical signal to an electrical signal, and output the converted electrical signal; and a controller configured to; control the terminal to operate in one of a visible light communication mode and a illuminance measurement mode based on the signal output from the light receiving element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A terminal configured to perform visible light communication, the terminal comprising:
a controller configured to; demodulate a signal outputted from an illuminance sensor based on a visible light communication scheme in a visible light communication mode; determine whether the output signal corresponds to a visible light communication signal by using the demodulated data; and switch the visible light communication mode to an illuminance measurement mode for measuring an illuminance by the illuminance sensor based on determining that the output signal does not correspond to a visible light communication signal. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A terminal comprising:
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a light receiving element configured to; receive an optical signal, convert the optical signal to an electrical signal, and output the converted electrical signal; and a controller configured to; determine whether a signal output from an illuminance sensor includes a visible light communication signal, and control the illuminance sensor to measure an illuminance based on determining that the signal output from the illuminance sensor is not the visible light communication signal. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification