Organic light emitting display device and method of manufacturing the same

A method of manufacturing an organic light emitting display device, the method comprising:

• preparing a substrate including a display area and a non-display area;
• forming a thin film transistor on the substrate in the display area;
• forming a planarization layer covering the thin film transistor on the substrate;
• forming a first electrode connected to the thin film transistor on the planarization layer in the display area;
• forming a pixel defining layer covering the first electrode and including a first opening that exposes a portion of the first electrode to define an emission area on the planarization layer;
• forming a first light blocking layer including a photochromic material on the pixel defining layer, a color of the first light blocking layer being reversibly changeable upon exposure to ultraviolet light;
• forming an organic light emitting layer on the first electrode;
• and
• forming a second electrode on the organic light emitting layer.