Patent ID: 7268943

Claim:
A 3-dimensional (3D) image display apparatus for viewing a 3D image comprising: an image panel comprising a plurality of pixels disposed in a horizontal direction, each pixel comprising sub-pixels R and L disposed in the horizontal direction; and a parallax barrier comprising a plurality of transparent slits formed in a tooth shape, wherein the tooth shape comprises a plurality of straight portions, the tooth shape being symmetrical in upper and lower directions with a width of about ½ of S and a pitch of about ½ of S in the upper and lower directions, and the plurality of straight portions are slanted at an angle of about 10˜15 degrees from a line parallel to the upper and lower direction, wherein in the case that the parallax barrier is provided behind the image panel, the pitch of the parallax barrier is S=2Pk(V+D)/V, and in the case that the parallax barrier is provided in front of the image panel, the pitch of the same is S=2Ph(V−D)V, where S is a slit pitch in a horizontal direction, and P is a pitch of the sub-pixels R and L in a horizontal direction, and V is a distance from the sub-pixels R and L to a viewer, and D is a distance from the sub-pixels R and L to the parallax barrier, and wherein k is a constant value having a range of 0.98<k<1.00, and h is a constant value having a range of 1.00<h<1.02.