Patent ID: 8174464

Claim:
A display device comprising: an image panel for displaying an image; and a barrier panel located in front of the image panel, the barrier panel being configured to present the image as a two-dimensional image or a three-dimensional image, wherein the barrier panel comprises: a first substrate; in-plane-switching (IPS) electrodes, each located directly on the first substrate; a second substrate including a transparent electrode located on an inner side surface thereof, the inner side surface of the second substrate facing the first substrate; and a liquid crystal layer interposed between the first substrate and the second substrate, wherein the barrier panel is configured to present the two-dimensional image in a two-dimensional display mode with a narrow viewing angle mode if an electric field is generated between the first substrate and the second substrate, wherein the barrier panel is configured to present the two-dimensional image in the two-dimensional display mode with a wide viewing angle mode if no electric field is generated between the first substrate and the second substrate and no voltage is applied, and no electric field is generated, between the IPS electrodes arranged on the first substrate, and wherein the barrier panel is configured to present the three-dimensional image in a three-dimensional display mode if no voltage is applied between IPS electrodes on the first substrate and the transparent electrode on the second substrate, and a predetermined voltage is applied between the IPS electrodes and an electric field substantially parallel to the first substrate is generated in a predetermined region.