Patent ID: 8866805

Claim:
A stereoscopic image display comprising: a display panel including data lines, gate lines crossing the data lines, and a plurality of pixels, each of which includes a main display unit and an auxiliary display unit, the display panel being divided into a first screen block and a second screen block, the display panel including a first discharge control line connected to auxiliary display units of the first screen block and a second discharge control line connected to auxiliary display units of the second screen block; a data driving circuit configured to supply a data voltage of a 2D image to the data lines in a 2D mode and supply a data voltage of a 3D image to the data lines in a 3D mode; a gate driving circuit configured to sequentially supply a scan pulse swinging between a gate low voltage and a gate high voltage to the gate lines in the 2D mode and the 3D mode; a control voltage generator configured to generate a first discharge control voltage of a first alternating current (AC) waveform and a second discharge control voltage of a second AC waveform, of which a phase is later than a phase of the first AC waveform by a half frame period, in the 3D mode; and a control voltage delay unit configured to delay the first discharge control voltage, supply the delayed first discharge control voltage to the first discharge control line, delay the second discharge control voltage, and supply the delayed second discharge control voltage to the second discharge control line.