Method for inspecting display panel and display device

A method for inspecting a display device, the method comprising:

• forming a backplane, an organic light-emitting layer, an encapsulation layer, and a polarizing film in a display area of a substrate;
• bonding a driver circuit to a non-display area of the substrate and covering the driver circuit by a protective layer;
• applying a shielding resin to a boundary area between the polarizing film and the protective layer, and applying a test pattern made of a same material as the shielding resin to a dummy area of the non-display area disposed at an outermost position of the substrate;
• irradiating the test pattern with ultraviolet light using a lighting device, and determining an angle and a light amount of the lighting device that make the ultraviolet light reflected from the test pattern to satisfy a specified optical condition;
• irradiating the shielding resin with ultraviolet light based on the determined angle and the determined light amount;
• and
• determining whether the shielding resin is properly applied by analyzing ultraviolet light reflected from the shielding resin.