Display device

A display device comprising:

• a display panel;
• an optical assembly which provides blue-based light to the display panel;
• and
• a diffusion plate which comprises an absorption layer that is located between the display panel and the optical assembly, and absorbs light having a wavelength of certain range,
• wherein, in a light provided to the display panel through the absorption layer, an intensity of green-based light is 20% to 70% of an intensity (100%) of the blue-based light, and an intensity of red-based light is 20% to 70% of the intensity of the blue-based light,
• wherein the diffusion plate comprises:
• a core plate having light-transmitting properties;
• and
• a skin layer located on a lower surface of the core plate,
• wherein the absorption layer is opposite to the skin layer with respect to the core plate,
• wherein the core plate comprises:
• a diffusion particle located inside the core plate;
• and
• a cavity formed inside the core plate,
• wherein a thickness of the absorption layer is greater than a thickness of the skin layer, and
• a thickness of the core plate is greater than the thickness of the absorption layer,
• wherein the skin layer of the diffusion plate includes a pattern that is formed on an outer surface of the skin layer,
• wherein the pattern is engraved or embossed on the outer surface of the skin layer,
• wherein the pattern has a quadrangular pyramid shape,
• a width of lower side of the pattern is 0.2 millimeters to 0.3 millimeters, and
• a depth or height of the pattern is 0.2 millimeters to 0.4 millimeters.