Patent ID: 8836775

Claim:
A stereoscopic image display device comprising: a display panel that is provided with a pixel array; a patterned retarder including a first retarder that transmits light which is incident from odd numbered display lines of the pixel array so as to be modulated into first polarized light, and a second retarder that transmits light which is incident from even numbered display lines of the pixel array so as to be modulated into second polarized light; and a data conversion unit that converts input side-by-side type 3D image data into line-by-line type 3D image data so as to correspond to the pixel array, performs a weighted average for luminance signals of odd and even data which are vertically adjacent to each other in left image data of the side-by-side type 3D image data, so as to correspond to the odd numbered display lines of the pixel array, and performs the weighted average for luminance signals of odd and even data which are vertically adjacent to each other in right image data of the side-by-side type 3D image data, so as to correspond to the even numbered display lines of the pixel array, wherein the data conversion unit performs the weighted average for luminance values of k-th (where k is a positive odd number) data and (k+1)-th data which are vertically adjacent to each other in the left image data, thereby modulating the luminance values into a luminance value of left image data which is displayed on a k-th display line of the pixel array, and performs the weighted average for luminance values of (k+1)-th data and k-th data which are vertically adjacent to each other in the right image data, thereby modulating the luminance values into a luminance value of right image data which is displayed on a (k+1)-th display line of the pixel array; wherein a weighted value for the weighted average is selected as a value greater than 0.5 and smaller than 1; and wherein a modulated luminance value (Odd L′ ) of left image data input to the odd numbered display line of the pixel array and a modulated luminance value (Even R′ ) of right image data input to the odd numbered display line of the pixel array are represented as in the following Equation 1: Odd L′ =α×Odd L +(1−α)×Even L Even R′ =α×Even R +(1−α)×Odd R [Equation 1] where Odd L and Even L respective denote original luminance values of odd left image data and even left image data which commonly correspond to a corresponding odd display line and are vertically adjacent to each other, Even R and Odd R respective denote original luminance values of even right image data and odd right image data which commonly correspond to a corresponding even display line and are vertically adjacent to each other, a denotes the weighted average.