Patent ID: 8675054

Claim:
A stereoscopic image display comprising: a display panel including data lines and gate lines crossing each other, the display panel configured to display data of a two-dimensional (2D) image in a 2D mode and display data of a three-dimensional (3D) image in a 3D mode in a time division manner; a data modulation unit configured to previously store modified values satisfying a luminance L i * of a gray level “i” defined by the following Equation and modulate left eye image data or right eye image data input during a current frame period to a modified value selected based on the result of a comparison between right/left eye image data input during a previous frame period and the left/right eye image data of the current frame period using the previously stored modified values; a data driving circuit configured to convert the left/right eye image data of the current frame period modulated by the data modulation unit into an analog gamma compensation voltage, generate a data voltage using the analog gamma compensation voltage, and supply the data voltage to the data lines; and a gate driving circuit configured to supply a gate pulse synchronized with the data voltage to the gate lines, L i * = X + ( i 255 ) γ · ( Y - X ) where X is one of a luminance change value L 0,255 obtained when the gray level “i” of the left/right eye image data of the current frame period is a minimum gray level “0 (zero)” and a gray level “j” of the right/left eye image data of the previous frame period is a maximum gray level “255”, and a luminance change value L 0,0 obtained when both the gray level “i” of the left/right eye image data of the current frame period and the gray level “j” of the right/left eye image data of the previous frame period are the minimum gray level “0 (zero)”, Y is one of a luminance change value L 255,0 obtained when the gray level “i” of the left/right eye image data of the current frame period is the maximum gray level “255” and the gray level “j” of the right/left eye image data of the previous frame period is the minimum gray level “0 (zero)”, and a luminance change value L 255, 255 obtained when both the gray level “i” of the left/right eye image data of the current frame period and the gray level “j” of the right/left eye image data of the previous frame period are the maximum gray level “255”.