The invention relates to methods and systems that suppress the expansion of an illuminating luminous flux in the short-side direction of a sub-pixel and prevents a color mixture caused by leak of light to an adjacent pixel electrode. The methods and systems of the invention set the direction of polarization separation, using a polarization transforming element, as the long-side direction of a sub-pixel with respect to the directions of the short sides and the long sides of sub-pixels arranged correspondingly to a microlens. The methods and systems of the invention also make the intervals between light source images narrower in the short-side direction, using a luminous flux separation optical element.