Window member and apparatus for manufacturing the same, and method for manufacturing the same

A method for manufacturing a window member, comprising:

• preparing a window member before being molded;
• preparing an apparatus for manufacturing the window member;
• and
• heating and compressing the window member before being molded through the apparatus to convert the window member into a bent window member, wherein the window member before being molded includes:
• a main part including a first side extending in a first direction, a second side extending in a second direction different from the first direction, and a first corner side positioned between the first side and the second side;
• a first side part in contact with the first side;
• a second side part in contact with the second side;
• and
• a first corner part positioned between the first side part and the second side part, and wherein:
• a first reference point is spaced apart from a reference center of curvature, the reference center of curvature corresponding to a center of curvature of the first corner side to one side in the first direction by a first distance and to one side in the second direction by a second distance,
• a first point is spaced apart from the first reference point to another side in the first direction by a third distance,
• a second point is spaced apart from the first reference point to another side in the second direction by a fourth distance,
• an ellipse includes the first distance as a first radius, the second distance as a second radius, and the reference center of curvature as a center,
• a reference line passes through the reference center of curvature and is inclined by a predetermined angle with respect to the first direction,
• a second reference point corresponds to a position where the ellipse and the reference line meet,
• a third point is positioned on the reference line and is positioned between the reference center of curvature and the second reference point,
• the first point overlaps the first side in the second direction and the second point overlaps the second side in the first direction, and
• the first corner part includes a shape of a spline curve connecting the first point to the third point to each other.