Display device

A display device, comprising:

• a display panel;
• a light-emission board located on a non-display side of the display panel and stacked with the display panel;
• and
• a light diffusion structure located between the light-emission board and the display panel;
• wherein the light-emission board comprises a base substrate and a plurality of light-emission units provided on the base substrate, and a maximum size of at least one light-emission unit in a direction parallel to the base substrate is not greater than 3 mm;
• the plurality of light-emission units comprises four immediately adjacent light-emission units, connecting lines of centers of the four immediately adjacent light-emission units define a parallelogram;
• any two of the four light-emission units are immediately adjacent to each other;
• a connecting line of centers of two light-emission units that define the parallelogram and have a largest distance therebetween passes through two first points in edges, close to each other, of the two light-emission units;
• a distance between the two first points is a first distance D1;
• an included angle between an outermost light ray of light rays emitted by one of the light-emission units and a plane parallel to the base substrate is θ;
• a minimum distance between surfaces, close to each other, of the display panel and the base substrate is not less than D1*tan θ/2, and an included angle between the outermost light ray of light rays emitted by the one of the light-emission units and a normal line of a light-emitting plane of the one of the light-emission units is α1/2, wherein the included angle θ is a complementary angle of α1/2, and a luminous intensity of the outmost light ray of the one of the light-emission units is half of a luminous intensity corresponding to a direction of the normal line of the one of the light-emission units.