Wearable device for reducing body fat using leds and method for operating same

A wearable device in a structure that is worn around a waist of a user to measure body fat of the user, the wearable device comprising:

• a first light emitting diode (LED) source that emits a first light having first wavelengths toward the waist;
• a second LED source that emits a second light having second wavelengths toward the waist;
• two vibration motors that provide a vibration to the waist;
• an input device that provides a user interface;
• a wireless transceiver that wirelessly communicates with a mobile device;
• a body fat sensor that measures the body fat;
• and
• a microprocessor that interprets an operation control signal input through one of the input device or the wireless transceiver and generates a first control signal and a second control signal based on the interpreted operation control signal,
• wherein at least one of the first LED source and the second LED source is turned on in response to the first control signal,
• at least one of the two vibration motors is turned on in response to the second control signal, and
• the microprocessor further accumulates and records an operation time of the wearable device, a first on-time of the first LED source, a second on-time of the second LED source, and third on-times of the vibration motors.

A method of controlling an operation of a wearable device that is worn around a waist of a user and that communicates wirelessly with a mobile device, the method comprising:

• receiving an operation control signal input that is input from the wearable device or the mobile device;
• selecting one of a plurality of operation modes based on the operation control signal, and generating a first control signal and a second control signal based on the selected operation mode;
• turning on:
• at least one of a first light emitting diode (LED) source and a second LED source in response to the first control signal, and
• at least one of a plurality of vibration motors in response to the second control signal;
• accumulating and recording a first on-time of the first LED source, a second on-time of the second LED source, and third on-times of the vibration motors;
• receiving a state request signal from the mobile device;
• and
• transmitting at least one of an operation time of the wearable device, the accumulated first on-time, the accumulated second on-time, and the accumulated third on-times to the mobile device in response to receiving the state request signal.