3D display alignment method

An apparatus for alignment of a thin-film transistor panel and a barrier panel of a three-dimensional display, the apparatus comprising:

• at least one light source for illuminating pixels in at least one region of the thin-film transistor panel and for illuminating at least one region of an exposure pattern of the barrier panel;
• a pattern recognition system for detecting light emitted from the at least one light source that is reflected by or transmitted through the three-dimensional display, to generate alignment data relating to an alignment between the detected illuminated pixels of the thin-film transistor and the exposure pattern of the barrier panel;
• and
• a positioning mechanism for adjusting the relative position between the barrier panel and the thin-film transistor panel in relation to the alignment data;
• wherein the at least one light source comprises at least one invisible light source which is operable to emit invisible light outside the visible region of the electromagnetic spectrum;
• and
• wherein the at least one invisible light source comprises an invisible light source positionable on the thin-film transistor panel side of the three-dimensional display and an invisible light source positionable on the barrier panel side of the three-dimensional display.