Display device

A display device comprising:

• a light source (A);
• a color conversion layer (B);
• and a color filter (C),
• wherein the color conversion layer (B) contains quantum dots (B-r) that emit red light,
• the color filter (C) has a blue color filter (C-b), a green color filter (C-g), and a red color filter (C-r), and
• the display device satisfies the following conditions (I) and (II):
• α≤1.80;
• and (I)
• β≥63.0, (II)
• wherein
• α=αb+αg+αr, and
• β=βb+βg+βr;
• in a spectrum curve I(x) obtained by plotting intensity I of light emitted from the color conversion layer (B) when the color conversion layer (B) is irradiated with light from the light source (A) versus wavelength x,
• when a pulse function that gives 0 in wavelength ranges of 380 nm≤x<440 nm, 460 nm<x<520 nm, 540 nm<x<620 nm, and 650 nm<x≤780 nm, and gives a value equal to the maximum intensity of the spectrum curve I(x) in wavelength ranges of 440 nm≤x≤460 nm, 520 nm≤x≤540 nm, and 620 nm≤x≤650 nm is expressed by a function f(x),
• αb represents a proportion of a region that does not overlap with a region of the function f(x) in a region of the spectrum curve I(x) in a wavelength range of 380 nm≤x<495 nm,
• αg represents a proportion of a region that does not overlap with a region of the function f(x) in a region of the spectrum curve I(x) in a wavelength range of 495 nm≤x≤585 nm, and
• αr represents a proportion of a region that does not overlap with a region of the function f(x) in a region of the spectrum curve I(x) in a wavelength range of 585 nm<x≤780 nm;
• and
• in a spectrum curve Tb(x) obtained by plotting light transmittance Tb of the blue color filter (C-b) versus wavelength x,
• in a spectrum curve Tg(x) obtained by plotting light transmittance Tg of the green color filter (C-g) versus wavelength x, and
• in a spectrum curve Tr(x) obtained by plotting light transmittance Tr of the red color filter (C-r) versus wavelength x,
• when a pulse function that gives 0 in wavelength ranges of 380 nm≤x<440 nm, 460 nm<x<520 nm, 540 nm<x<620 nm, and 650 nm<x≤780 nm, and gives a light transmittance of 100% in wavelength ranges 440 nm≤x≤460 nm, 520 nm≤x≤540 nm, and 620 nm≤x≤650 nm is represented by a function g(x),
• βb represents an area of a region where a region of the spectrum curve Tb(x) and a region of the function g(x) overlap in the wavelength range of 440 nm≤x≤460 nm,
• βg represents an area of a region where a region of the spectrum curve Tg(x) and a region of the function g(x) overlap in the wavelength range of 520 nm≤x≤540 nm, and
• βr represents an area of a region where a region of the spectrum curve Tr(x) and a region of the function g(x) overlap in the wavelength range of 620 nm≤x≤650 nm.