Light-emitting diode driving device, driving method and light-emitting diode lighting module comprising the same

A light emitting diode (LED) driving device comprising:

• a power source supplying AC voltage;
• a rectification unit communicatively coupled to the power source, the rectification unit configured to receive the AC voltage from the power source and generate a rectified voltage by rectifying the AC voltage;
• a plurality of LED driving units configured to receive the rectified voltage from the rectification unit and generate a primary driving signal using the rectified voltage;
• a plurality of LED driving signal modulation units communicatively coupled to the plurality of LED driving units, the plurality of LED driving signal modulation units configured to receive the primary driving signal and generate a secondary pulse driving signal through a modulation of the primary driving signal;
• LED groups including LEDs and configured to receive the primary driving signal or the secondary pulse driving signal to operate the LEDs according to the received primary driving signal or the secondary pulse driving signal;
• and
• a plurality of selectors communicatively coupled to the LED driving units and the LED driving signal modulation units and configured to output the primary driving signal or the secondary pulse driving signal to the plurality of LED groups.

A method for driving a light emitting diode, comprising:

• supplying AC voltage;
• rectifying the supplied AC voltage;
• generating a primary driving signal using the rectified voltage;
• generating a secondary pulse driving signal through a modulation of the primary driving signal;
• supplying the primary driving signal or the secondary pulse driving signal to a plurality of LED groups;
• and
• after the generating the secondary pulse driving signal and before the supplying the primary driving signal or the secondary pulse driving signal, providing a selection signal selecting one of the primary driving signal and the secondary pulse driving signal.

A light emitting diode lighting module comprising:

• an LED group comprising at least one light emitting diode;
• a power source supplying AC voltage;
• a rectification unit communicatively coupled to the power source, the rectification unit configured to rectify the AC voltage supplied from the power source and provide a rectified voltage;
• a driving signal generator communicatively coupled to the rectification unit, the driving signal generator configured to generate a primary driving signal having a constant current value of 1 A or more using the rectified voltage from the rectification unit;
• an LED driving signal modulation unit communicatively coupled to the driving signal generator, the LED driving signal modulation unit configured to generate a secondary pulse driving signal through a modulation of the primary driving signal;
• and
• a driving signal supplier communicatively coupled to the LED group and supplying the secondary pulse driving signal at a peak current density of 70 A/cm2 or more to the LED group when a separate driving control signal is not applied.