A light emitting display apparatus comprising: a light emitting display panel, a controller, a data driver, a gate driver, and a storage unit, wherein the light emitting display panel includes a plurality of pixels (110, P) respectively including a light emitting device (OLED) and a driving transistor (Tdr) configured to drive the light emitting device (OLED), the controller is configured to set black image data corresponding to a black image displayed through the plurality of pixels (110, P) in one frame period after a normal image is displayed through the plurality of pixels (110, P) in the one frame period, and to transfer the black image data to the data driver, the data driver is configured to convert the black image data into black image data voltages (Vdata_BI) and to output the black image data voltages (Vdata _BI) to data lines (DL1,..., DLd) included in the light emitting display panel, the black image data voltages (Vdata _BI) being an average value of the minimum value of normal image data voltages (Vdata_I) which are output to all pixels (110, P) included in the light emitting display panel in the one frame period and a reference black image data voltage (Vdata_Bref), wherein the black image data voltages (Vdata _BI) are greater than the reference black image data voltage (Vdata_Bref) and less than a predetermined highest black image data voltage (Vdata_H) which has a highest value among data voltages capable of expressing black, the gate driver is configured to output gate signals to gate lines (GL1,..., GLg) included in the light emitting display panel, based on control by the controller, and the storage unit is configured to store the minimum value generated from the light emitting display panel. a light emitting display panel, a controller, a data driver, a gate driver, and a storage unit, wherein the light emitting display panel includes a plurality of pixels (110, P) respectively including a light emitting device (OLED) and a driving transistor (Tdr) configured to drive the light emitting device (OLED), the controller is configured to set black image data corresponding to a black image displayed through the plurality of pixels (110, P) in one frame period after a normal image is displayed through the plurality of pixels (110, P) in the one frame period, and to transfer the black image data to the data driver, the data driver is configured to convert the black image data into black image data voltages (Vdata_BI) and to output the black image data voltages (Vdata _BI) to data lines (DL1,..., DLd) included in the light emitting display panel, the black image data voltages (Vdata _BI) being an average value of the minimum value of normal image data voltages (Vdata_I) which are output to all pixels (110, P) included in the light emitting display panel in the one frame period and a reference black image data voltage (Vdata_Bref), wherein the black image data voltages (Vdata _BI) are greater than the reference black image data voltage (Vdata_Bref) and less than a predetermined highest black image data voltage (Vdata_H) which has a highest value among data voltages capable of expressing black, the gate driver is configured to output gate signals to gate lines (GL1,..., GLg) included in the light emitting display panel, based on control by the controller, and the storage unit is configured to store the minimum value generated from the light emitting display panel.