Luminescence driving apparatus, display apparatus, and driving method thereof

A luminescence driving apparatus comprising:

• a driving circuit which is connected to at least one light-emitting device and drives the at least one light-emitting device according to a control pulse having an amplitude of which fluctuates;
• a controller which, if an internal current of the at least one light-emitting device is less than or equal to a preset threshold value, senses a voltage at a preset position of the driving circuit regardless of the amplitude of the control pulse, and determines whether a short-circuit has occurred between the at least one light-emitting device and the driving circuit using a level of the sensed voltage;
• and
• a protector which, if it is determined that the short-circuit has occurred between the at least one light-emitting device and the driving circuit, performs a protection operation with respect to the at least one light-emitting device,
• wherein the driving circuit comprises:
• an input port which receives driving power;
• a first ground which is connected to an end of a first circuit device connected to the input port;
• an output port which is connected to the at least one light-emitting device;
• a second ground which is connected to an end of a second circuit device connected to the output port;
• and
• a resistor which is connected between the first and second grounds,
• wherein the resistor is at the preset position and the controller senses a voltage applied to the resistor.

A display apparatus, comprising:

• at least one light-emitting diode (LED) array;
• a driving circuit which is connected to the at least one LED array and drives the at least one LED array according to a control pulse having an amplitude of which fluctuates;
• a controller which, if an internal current of the at least one LED array is less than or equal to a preset threshold value, senses a voltage at a position selected from among a plurality of different positions of the driving circuit, based on the amplitude of the control pulse and determines whether a short-circuit has occurred between the at least one LED array and the driving circuit using a level of the sensed voltage;
• and
• a protector which, if it is determined that the short-circuit has occurred between the at least one LED array and the driving circuit, performs a protection operation with respect to the at least one LED array,
• wherein the controller selects a first position from among the plurality of different positions if the amplitude of the control pulse is a high value, and selects a second position, different from the first position, from among the plurality of different positions if the amplitude of the control pulse is a low value.

A driving method of a luminescence driving apparatus, comprising:

• driving at least one light-emitting device according to a control pulse having an amplitude of which fluctuates;
• if an internal current of the at least one light-emitting device is less than or equal to a threshold value, selecting a position from among a plurality of positions of a driving circuit, which drives the at least one light-emitting device, based on the amplitude of the control pulse, and sensing a voltage at the selected position;
• determining whether a short-circuit has occurred between the at least one light-emitting device and the driving circuit using a level of the sensed voltage;
• and
• if it is determined that the short-circuit has occurred between the at least one light-emitting device and the driving circuit, performing a protection operation with respect to the at least one light-emitting device,
• wherein the selecting comprises selecting a first position from among the plurality of different positions if the amplitude of the control pulse is a high value, and selecting a second position, different from the first position, from among the plurality of different positions if the amplitude of the control pulse is a low value.

A driving method of a luminescence driving apparatus, the driving method comprising:

• driving at least one light-emitting device according to a control pulse having an amplitude of which fluctuates;
• if an internal current of the at least one light-emitting device is less than or equal to a threshold value, sensing a voltage at a preset position of a driving circuit regardless of the amplitude of the control pulse and determining whether a short-circuit has occurred between the at least one light-emitting device and the driving circuit using a level of the sensed voltage;
• and
• if it is determined that the short-circuit has occurred between the at least one light-emitting device and the driving circuit, performing a protection operation with respect to the at least one light-emitting device,
• wherein the driving circuit comprises:
• an input port which receives driving power;
• a first ground which is connected to an end of a first circuit device connected to the input port;
• an output port which is connected to the at least one light-emitting device;
• a second ground which is connected to an end of a second circuit device connected to the output port;
• and
• a resistor which is connected between the first and second grounds,
• wherein the resistor is located at the preset position and the sensing of the voltage comprises sensing a voltage applied to the resistor.

A driving method of a display apparatus, the driving method comprising:

• driving at least one LED array according to a control pulse having an amplitude of which fluctuates;
• if an internal current of the at least one LED array is less than or equal to a preset threshold value, selecting a position of a plurality of positions of a driving circuit, which drives the at least one LED array, based on the amplitude of the control pulse, and sensing a voltage at the selected position;
• determining whether a short-circuit has occurred between the at least one LED array and the driving circuit using a level of the sensed voltage;
• and
• if it is determined that the short-circuit has occurred between the at least one LED array and the driving circuit, performing a protection operation with respect to the at least one LED array;
• wherein the selecting comprises selecting a first position from among the plurality of different positions if the amplitude of the control pulse is a high value, and selecting a second position, different from the first position, from among the plurality of different positions if the amplitude of the control pulse is a low value.

A luminescence driving apparatus, comprising:

• a driving circuit which is connected to at least one light-emitting device and drives the at least one light-emitting device according to a control pulse which has a fluctuating amplitude;
• a controller which monitors an internal current of the at least one light-emitting device, and, if the internal current is less than or equal to a present threshold value, performs a short-circuit detection operation,
• wherein, during the performing of the short-circuit detection operation, the controller selects a position from among a plurality of different positions of the driving circuit based on the amplitude of the control pulse, senses a voltage at the selected position, and determines whether a short-circuit has occurred between the at least one light-emitting device and the driving circuit based on a level of the sensed voltage,
• wherein the controller selects a first position from among the plurality of different positions if the amplitude of the control pulse is a high value, and selects a second position, different from the first position, from among the plurality of different positions if the amplitude of the control pulse is a low value.