Display system and self-checking method of the display system

A light-emitting diode (LED) checking method which is implemented in an LED driving system, the LED checking method comprising:

• controlling a current flow such that no current flows through a first LED array comprising at least one LED and such that a current flows through a second LED array comprising at least one LED;
• detecting a first sensing voltage from the first LED array;
• after the detecting the first sensing voltage, controlling the current flow such that a current flows through the first LED array and such that no current flows through the second LED array;
• detecting a second sensing voltage from the second LED array;
• and
• adjusting at least one from among an amount of the current flowing through the first LED array and an amount of the current flowing through the second LED array, based on a comparison result between the detected first sensing voltage and the detected second sensing voltage.

A light-emitting diode (LED) driving system comprising:

• a first LED array comprising at least one LED;
• a second LED array comprising at least one LED;
• an LED current controller configured to control an amount of a current flowing through the first LED array and an amount of a current flowing through the second LED array;
• and
• a detector configured to detect a first sensing voltage from the first LED array when no current flows through the first LED array, and to detect a second sensing voltage from the second LED array when no current flows through the second LED array,
• wherein the LED current controller is further configured to adjust at least one from among the amount of the current flowing through the first LED array and the amount of the current flowing through the second LED array, based on a comparison result between the detected first sensing voltage and the detected second sensing voltage.

A light-emitting diode (LED) checking method which is implemented in an LED driving system, the LED checking method comprising:

• controlling a current flowing through a plurality of LED arrays, each of the plurality of LED arrays including at least one LED, such that no current flows through a first LED array from among the plurality of the LED arrays and a current flows through a second LED array from among the plurality of the LED arrays;
• detecting a sensing voltage from the first LED array;
• and
• determining, based on a comparison result between the detected sensing voltage and a reference voltage, a failure of the at least one LED included in the second LED array,
• wherein the sensing voltage comprises a photovoltaic voltage caused by a light wave received from the at least one LED included in the second LED array.