Organic electroluminescent display device and method for producing same

An organic electroluminescent display device including a plurality of pixels, comprising:

• an element substrate including a substrate, a plurality of organic electroluminescent elements supported by the substrate and respectively located in the plurality of pixels, and a bank layer defining each of the plurality of pixels;
• and
• a thin film encapsulation structure covering the plurality of pixels,
• wherein the bank layer has an inclining surface enclosing each of the plurality of pixels,
• wherein the thin film encapsulation structure includes a first inorganic barrier layer, an organic barrier layer including a plurality of solid portions in contact with a top surface of the first inorganic barrier layer and distributed discretely, and a second inorganic barrier layer in contact with the top surface of the first inorganic barrier layer and top surfaces of the plurality of solid portions of the organic barrier layer,
• wherein the plurality of solid portions include pixel periphery solid portions each extending, on the first inorganic barrier layer, from a portion on the inclining surface to a peripheral area in a corresponding pixel of the plurality of pixels, the pixel periphery solid portions each extending along the entirety of a circumference of the pixel,
• wherein a refractive index of the first inorganic barrier layer is 1.75 or larger and 1.90 or smaller,
• wherein a refractive index n0 of the organic barrier layer is smaller than a refractive index n1 of the second inorganic barrier layer, and
• for at least one of the pixel periphery solid portions, an inclination angle θa formed between a top surface of the pixel periphery solid portion and the top surface of the first inorganic barrier layer at a position in the peripheral area in the corresponding pixel distal the bank layer and constituting a vertex where the second inorganic barrier layer separates from the first inorganic barrier layer is larger than, or equal to, 30 degrees, and smaller than, or equal to, 40 degrees.