A display device includes a plurality of light emitting units and a light adjusting layer disposed on the light emitting units. The light adjusting layer includes at least one light adjusting structure, and one light adjusting structure is corresponding to at least three of the light emitting units. The display device provides a sum of viewing-angles of a first number of the light emitting units when the first number of the light emitting units is turned on, and the display device provides a sum of viewing-angles of a second number of the light emitting units when the second number of the light emitting units is turned on. The first number is less than the second number, and the sum of viewing-angles of the first number of the light emitting units is less than the sum of viewing-angles of the second number of the light emitting units.