Patent ID: 8354983

Claim:
A display comprising: a scan line; a plurality of data lines forming junctions with said scan line; a plurality of pixel circuits, each of which is disposed at a corresponding one of the junctions of said scan line and said data lines and includes a light-emitting member, wherein when said scan line and one of said data lines are driven, said pixel circuit on the junction of said scan line and said one of said data lines is activated, and generates a driving current that drives said light-emitting member thereof to emit light; a compensation circuit coupled to said pixel circuits, and operable so as to generate a comparing signal and a positioning signal based on the driving current generated by an activated one of said pixel circuits, the positioning signal indicating a position of said activated one of said pixel circuits; a voltage controller coupled to said compensation circuit, and operable so as to generate a reference voltage that corresponds to the positioning signal with reference to the comparing signal generated by said compensation circuit; and a data line driver coupled to said data lines and said voltage controller, adapted to receive an image signal, and operable so as to correct the image signal received thereby based on the reference voltage generated by said voltage controller, and so .as to drive said data lines with the image signal corrected thereby; wherein said compensation circuit includes a transistor unit coupled to said pixel circuits and said voltage controller, and a comparator coupled to said transistor unit and adapted to receive a reference current, said comparator receiving the driving current generated by said activated one of said pixel circuits when said transistor unit is turned on, and comparing the driving current received thereby to the reference current received thereby so as to generate the comparing signal, the comparing signal generated by said compensation circuit being a high level signal when it is determined by said comparator that the driving current is less than the reference current; wherein the display is operable in a first detection mode, where said data line driver is operable to drive one of said data lines that corresponds to said activated one of said pixel circuits with a predetermined test signal, and to correct the predetermined test signal in steps according to a predetermined adjustment signal until the reference voltage from said voltage controller indicates transition of the comparing signal from the high level signal to a low level signal; and wherein said voltage controller generates the reference voltage based on the predetermined adjustment signal and a number of steps taken to correct the predetermined test signal.