Moire reduction in an autostereoscopic display device

A method for manufacturing an autostereoscopic display device, the autostereoscopic display device electrically switchable from a first view mode to a second view mode, the autostereoscopic display device including a display panel having an array of display pixel elements for producing a display output, and a lenticular device provided over the display panel that is electrically switchable to provide the first view mode or the second view mode, wherein in one of the two view modes the lenticular device comprises lenticular lens areas which are configured to direct the display output from different display pixel elements to different spatial positions within a field of view of the autostereoscopic display device to allow a display of an autostereoscopic image that includes a left image and a right image, the lenticular device comprising:

• a first optically transparent substrate comprising an array of lenticular elements, wherein the lenticular elements have a first surface with liquid crystal alignment properties;
• a second optically transparent substrate having a second surface with liquid crystal alignment properties, the first surface and the second surface facing each other;
• a first planar switching electrode at a side of the first optically transparent substrate;
• a second planar switching electrode at a side of the second optically transparent substrate;
• a liquid crystal medium comprising liquid crystal molecules, the liquid crystal medium being sandwiched between the two optically transparent substrates wherein the liquid crystal medium is in contact with the first surface and the second surface, wherein
• 1. In the first view mode, the liquid crystal molecules are aligned in a plane of the planar switching electrodes;
• and
• 2. In the second view mode, the liquid crystal molecules are oriented normal to the two planar switching electrodes;
• and
• means for applying a switching voltage across both planar switching electrodes to effect the switching from the first view mode to the second view mode;
• wherein a nanorelief structure is provided on the first surface of the lenticular elements of the first optically transparent substrate and/or on the second surface of the second optically transparent substrate, and wherein the nanorelief structure comprises valleys between ridges, the valleys being filled with liquid crystal molecules of the liquid crystal medium, and wherein the nanorelief structure is configured to scatter a display output when the nanorelief structure is illuminated by the display output and when the liquid crystal molecules in the valleys of the nanorelief structure have an orientation that provides the liquid crystal medium in the valleys with a refractive index that is different from the refractive index of the nanorelief structure;
• the method comprising:
• modifying the switching voltage to reduce moire.