Method of compensating luminance of OLED and display system using the same

A display system, comprising:

• a display panel, comprising a plurality of pixel cells, each of which comprising an organic light-emitting diode (OLED) operated with a transistor;
• an external compensation module, for measuring an electronic mobility and an oxide capacitance of the transistor and a luminous efficiency of the OLED, and generating a first lookup table comprising information for compensating the electronic mobility and the oxide capacitance of the transistor and a second lookup table comprising information for compensating the luminous efficiency of the OLED;
• and
• a controller, for converting original display data to target display data according to the first lookup table and the second lookup table, and outputting the target display data to one of the plurality of pixel cells;
• wherein the threshold voltage of the transistor is compensated when the target display data is received by the pixel cell;
• wherein the compensation of the threshold voltage is an internal compensation performed by the pixel cell.