A display device (1) includes a substrate (10), a plurality of light-emitting units (11), a plurality of color filter units (12) and a protecting layer (13). The plurality of color filter units (12) are disposed on the plurality of light-emitting units (11) and include a first color filter unit (12-1). The first color filter unit (12-1) is overlapped with a first light-emitting unit (11-1) of the plurality of light-emitting units (11). The protecting layer (13) is arranged on the plurality of color filter units (12). The display device (1) has a maximum light-emitting angle 82, the protecting layer (13) has a refractive index n1, the first color filter unit (12-1) has a width WCF along a first direction (D1), a light-emitting layer of the first light-emitting unit (11-1) has a width WL along the first direction (D1), and the first color filter unit (12-1) has a thickness HCF, a distance H is formed between the first light-emitting unit (11-1) and the first color filter unit (12-1).