Display device

A display device comprising:

• an illumination device;
• a first substrate comprising a first insulating substrate, a switching element provided on the first insulating substrate, a common electrode provided over a plurality of pixels, a pixel electrode provided in each pixel, electrically connected to the switching element and facing the common electrode, and a first alignment film;
• a second substrate comprising a second insulating substrate and a second alignment film, and facing the first substrate;
• a first liquid crystal layer provided between the first substrate and the second substrate;
• a first polarizer attached to the first substrate;
• a second polarizer attached to the second substrate;
• and
• a transmissive diffraction grating provided in a location between the illumination device and the first polarizer or in a location facing the second polarizer, wherein
• the pixel electrode comprises a plurality of branch portions extending in a first direction and arranged with a predetermined pitch in a second direction, and a trunk portion extending in the second direction and connected to the branch portions, and
• the diffraction grating comprises:
• a third substrate comprising a third insulating substrate and a third alignment film;
• a fourth substrate comprising a fourth insulating substrate and a fourth alignment film;
• and
• a second liquid crystal layer provided between the third substrate and the fourth substrate, containing a plurality of liquid crystal molecules, and cured in a state where alignment directions of the liquid crystal molecules are fixed.