Electronic mirror device

A display device comprising:

• a display panel that displays an image;
• a reflective polarizing layer that transmits a polarization component of incident light in a first direction and reflects a polarization component of the incident light in a second direction different from the first direction;
• a transparent plate that transmits the incident light;
• and
• a retardation film bonded to the transparent plate, wherein
• the reflective polarizing layer is disposed between the display panel and the retardation film,
• the retardation film contains polyethylene terephthalate and has a retardation value in a range of 2000 nm or more and 4000 nm or less,
• an angle between a slow axis of the retardation film and a polarization reflection axis of the reflective polarizing layer is 30 degrees or more and 60 degrees or less,
• a slow axis at a first point in the retardation film is more inclined toward a third direction than a slow axis at a second point in the retardation film, and
• the first point is closer to an end of the retardation film in a fourth direction, perpendicular to the third direction, than the second point.