Holographic display apparatus for providing expanded viewing window

A holographic display apparatus comprising:

• a light source;
• a spatial light modulator comprising a plurality of pixels arranged in a lattice, wherein the spatial light modulator is configured to modulate light incident thereon from the light source and output a plurality of holographic images, and wherein a physical structure of the lattice outputs a plurality of lattice spots;
• and
• a spatial filter configured to direct the plurality of holographic images toward a viewer and to block the plurality of lattice spots or to direct the plurality of lattice spots away from the viewer,
• wherein each of the plurality of holographic images comprises a first color image and a second color image,
• wherein each of the plurality of lattice spots comprises a first color lattice spot and a second color lattice spot, and
• wherein the spatial filter is configured to separate the first color image and the second color image from the first color lattice spot and the second color lattice spot such that the first color image and the second color image are directed toward the viewer and the first color lattice spot and the second color lattice spot are blocked or directed away from the viewer.