Display device

A display device comprising:

• a light source section which emits a light beam;
• a spatial light modulation element in which a plurality of pixel portions, each of whose state related to light modulation is changed in accordance with an image signal, are arranged in a two dimensional manner, and which modulates, every each pixel portion, the light beam incident to the plurality of pixel portions from the light source;
• an image forming optical system for imaging the light beam, including a pixel size adjustment section in which a plurality of beam reduction portions are arranged in a two dimensional manner correspondingly to the plurality of pixel portions, a diameter of the light beam modulated by the pixel portion being reduced by the beam reduction portion corresponding to the pixel portion;
• and
• a scanning section, by deflecting a group of the light beams whose diameters are reduced by the pixel size adjustment section in a sub scanning direction, which scans a surface to be scanned of an image display body with the group of the light beams,
• wherein the plurality of pixel portions are arranged along a column direction and a row direction corresponding to the sub scanning direction and a main scanning direction orthogonal to the sub scanning direction respectively, at least the column direction being inclined with respect to the sub scanning direction by a predetermined inclining-angle, and
• the inclining-angle is set in accordance with a scanning density of the light beam in the main scanning direction on the surface to be scanned.