Apparatus and method for fabricating display panel, and display panel

A method for fabricating a display panel, the method comprising:

• forming a plurality of light-emitting elements on a base substrate, the light-emitting elements comprising first light-emitting elements and second light-emitting elements, the second light-emitting elements comprising alignment keys formed on one side;
• transferring and attaching the plurality of light-emitting elements to a transfer film;
• disposing the transfer film on a plate-shaped frame of an elongation processing member by fixing an outer circumference of the transfer film on which the plurality of light-emitting elements is attached with a fixing frame;
• monitoring an amount of light reflected from the transfer film by an optical inspection member;
• and
• elongating a width of the transfer film toward the outer circumference thereof by the elongation processing member while controlling a degree of elongation based on detection results by the optical inspection member.