Luminescence driving apparatus, display apparatus, and driving method thereof

A display apparatus, comprising:

• a plurality of light emitting diode (LED) arrays;
• a voltage sensor which senses internal voltages of the plurality of LED arrays;
• a current sensor which senses internal currents of the plurality of LED arrays;
• and
• a controller which, if it is determined that an overvoltage state has occurred, using an overvoltage determination signal corresponding to the internal voltages sensed by the voltage sensor, checks at least one of the plurality of LED arrays in which the overvoltage state has occurred, according to levels of the internal currents sensed by the current sensor and performs an overvoltage protection (OVP) operation with respect to the at least one LED array.

A luminescence driving method of driving a plurality of light-emitting units, the luminescence driving method comprising:

• determining whether an overvoltage state has occurred, using internal voltages of the plurality of light-emitting units;
• if it is determined that the overvoltage state has occurred, searching for one of the plurality of light-emitting units in which the overvoltage state has occurred, using internal currents of the plurality of light-emitting units;
• and
• performing an OVP operation with respect to the searched light-emitting unit.