Driver for a Display Device

A display device comprising a plurality of pixels;

• wherein the display device is arranged to display a hologram of a picture on the plurality of pixels such that, when the display device is suitably illuminated, a holographic reconstruction of the picture is formed downstream of the display device, the holographic reconstruction comprising a plurality of image points;
• wherein display device is arranged such that each image point is formed using a contiguous group of pixels of the display device;
• wherein each contiguous group of pixels comprises less than 5% of a total number of pixels of the display device.

A method of calculating a hologram of an picture for an optical system comprising a pixelated display device arranged to display the hologram, the picture comprising a plurality of image points, the method comprising:

• for each image point, defining an area on the display device using straight line paths from the image point to the display device;
• determining a sub-hologram for each image point and displaying the sub-hologram on the respective area of the display;
• wherein each area on the display device comprises a contiguous group of pixels, each contiguous group comprising less than 5% of a total number of pixels of the display device.