Display device

A display device comprising:

• a display unit including a lower substrate and a first light emitting element, a second light emitting element, and a third light emitting element disposed on the lower substrate;
• a color filter unit including an upper substrate having a lower surface facing the first, second, and third light emitting elements;
• and
• a filler disposed between the display unit and the color filter unit and including a wavelength conversion particle, wherein
• the display unit further includes:
• a bank layer disposed on the first, second, and third light emitting elements and including a first opening, a second opening, and a third opening;
• a first column spacer filling the first opening;
• and
• a second column spacer filling the second opening, and
• the color filter unit further includes a color filter layer including a first color filter, a second color filter, and a third color filter disposed on the lower surface of the upper substrate.