According to an embodiment, a light emission device and a display device having the light emission device as a light source are provided. The light emission device includes a first substrate; a second substrate opposing the first substrate; a gate electrode formed over the first substrate; a plurality of electron emission areas on the gate electrode, each electron emission area comprising a plurality of openings formed through the gate electrode, wherein electrons are to be emitted from the electron emission areas through the plurality of openings in a general direction from the first substrate to the second substrate; a light emission unit located on the second surface facing the first substrate; and at least one spacer interposed between the first and second substrates, wherein the gate electrode comprises a plurality of spacer mounting regions, each of which is free of openings and is immediately next to each electron emission area, and wherein each of the plurality of electron emission areas have a generally identical shape when viewed from the second substrate in a direction perpendicular to the gate electrode.