Display device including cover window with flat side surfaces

A display device, comprising:

• a housing that comprises sidewalls and mounting surfaces at upper ends of the sidewalls, each mounting surface of the housing including at least two flat surfaces not parallel to each other;
• a display panel housed in the housing;
• and
• a cover window on the display panel,
• wherein the cover window includes:
• an upper surface that faces outwardly in a direction in which light is emitted,
• a lower surface opposite to the upper surface, the lower surface being narrower than the upper surface, and
• side surfaces that slope inwardly from ends of the upper surface to ends of the lower surface, each side surface of the cover window including at least two flat surfaces not parallel to each other that conform to a shape of the mounting surface of the housing, wherein
• the side surfaces of the cover window are mounted on the mounting surfaces of the housing.