Apparatus for controlling driving of lighting-emitting diode and method of providing control signal thereof

A method of providing a signal for controlling the driving of an LED, the method comprising:

• receiving an input signal, generating a motion velocity signal of an object, comparing input signals received in previous sections and generating a previous section average value;
• generating a motion state value for the input signal according to the previous section average value and settings for determination of a motion state of the object;
• using the motion velocity signal and the motion state value to generate a frequency value of a switching control signal;
• generating an LED switching control signal according to the frequency value of the switching control signal and applying a generated signal to an LED driving unit.

An apparatus for sensing and recognizing a motion, the apparatus comprising:

• an infrared LED (IRLED) array unit radiating an infrared ray to an object;
• a PD array unit receiving an infrared ray reflected from the object and generating a current signal according to the received amount of the infrared ray;
• a PD signal processing unit processing the current signal and generating a PD signal value being represented as digital data;
• a motion sensing and recognizing unit using the PD signal value to recognize the approach or travel direction of the object;
• an LED driving unit driving the IRLED array unit in response to an applied switching control signal;
• and
• an IRLED control unit using the PD signal value to generate a switching control signal according to a motion level of the object.