The present invention provides a display device capable of presenting a display with a large color reproduction range and displaying bright red. A display device according to the present invention forms an image by using red, green, blue, and yellow pixels, and includes a light source. Light emitted from the light source has a red peak wavelength of 615 nm or more and 650 nm or less. A half-width of the red peak is 15 nm or more and 70 nm or less when the peak wavelength is 615 nm or more and 635 nm or less, 40 nm or more and 93 nm or less when the peak wavelength is more than 635 nm and 640 nm or less, and 57 nm or more and 93 nm or less when the peak wavelength is more than 640 nm and 650 nm or less.