1. A 3-dimensional display device comprising: a display panel for displaying an image; a backlight for supplying light to the display panel; and a switching liquid crystal panel between the display panel and the backlight to display 2-dimensional image and 3-dimensional image by blocking and transmitting the light from the backlight in part area, the switching liquid crystal panel being divided a plurality of regions to display respectively the 2-dimensional image and the 3-dimensional image in each regions, the switching liquid crystal panel including: first and second substrates; a liquid crystal layer between the first and second substrates; and first electrode on a part of the first substrate and a second electrode on the second substrate to apply voltage to the liquid crystal layer, wherein the display panel is divided into a 2-dimensional region for displaying 2-dimensional image and a 3-dimensional region for displaying 3-dimensional image, the first electrode being declined with a side of the first and second substrates, the first electrode at a boundary of the 2-dimensional region and the 3-dimensional region being divided at the boundary of the 3-dimensional region and the end portion of the first electrode being facing for each other at the boundary of the 2-dimensional region and the 3-dimensional region so that different signals are respectively supplied to the divided first electrode.