Electronical correction of misalignments between optical grid and pixel panel on autostereoscopic displays

Large-area displays and an especial sharp image quality are built by gradual increasing pixel density. This trend is predestinated for the field of autostereoscopic 3D displays. Though it is hardly possible to adjust the optical grid against the pixel panel, due to micrometer scaled structures. This paper presents a method to locally correct adjustment failure by reallocating the image information in fine steps by adapting existing methods. It is possible to use the applicable methods at single-user, multiview as well as integral-imaging displays, and it enables an adjustment to the observer positions. With the correction method developed by us, local misalignments can be detected in a test image, which arranges the individual stereo channels on an HSV-color cycle by color coding. The test image will be detected and measured by a photo-spectrometer in a preselected position. We also demonstrate the generation of a resulting correction-map, which contains the position, offset or shift value as well as the shift direction of the affected subpixels. The effectiveness of this correction method was proven by measurements and also determined its working scope.