Patent ID: 7834944

Claim:
A method for the orientation of a parallax barrier screen on a display screen with pixels x(i,j) in a pattern of rows (i) and columns (j) to produce a display screen for three-dimensional representation, the method comprising: presenting a test image having different views A(k) with k=1, n and n=6 or n=7, on the pixels x(i,j) with rows (i) and columns (j), the test image comprising at least two first straight lines having two directions of extension different from one another and the first lines each being placed at different horizontal positions in n=6 or n=7 views, wherein the test image comprises at least two second straight lines, which are each oriented parallel to one of the first lines and which in each view are placed at least the same horizontal positions in the n=6 or n=7 views A(k); observing the presented test image through the parallax barrier screen at a defined distance by a two-dimensional camera; orientating the parallax barrier screen in front of the display screen such that in an image taken by the camera of the presented test image in each view each first line merges seamlessly into at least one correspondingly placed second line, and that all first and second lines in the image are shown as straight and continuous so that the orientation of the parallax barrier screen to the display screen with pixels x(i,j) is defined precisely with a tolerance of at most 3 arc minutes with respect to the rotative relative position of the parallax barrier screen to the display screen and so that the orientation of the parallax barrier screen to the display screen with pixels x(i,j) is defined precisely with a tolerance of at most the width and/or height of a pixel x(i,j) with respect to the horizontal and/or vertical relative position of the parallax barrier screen to the display screen.