Display element, optical device, and optical device manufacturing method

An organic electroluminescence (EL) display device comprising:

• an array substrate including an effective portion on which an organic EL element is formed;
• and
• a sealer including
• a first barrier layer which covers the organic EL element formed on the effective portion, is formed over a range larger than the effective portion and includes an upper surface,
• a first buffer layer which is disposed above the upper surface of the first barrier layer, partially covers the first barrier layer and includes an upper surface and an outer end portion,
• a second barrier layer which covers the upper surface and the outer end portion of the first buffer layer, adheres to the first barrier layer at a periphery of the first buffer layer and includes an upper surface,
• a second buffer layer which is disposed above the upper surface of the second barrier layer, partially covers the second barrier layer and includes an upper surface and an outer end portion, and
• a third barrier layer which covers the upper surface and the outer end portion of the second buffer layer and adheres to the second barrier layer at a periphery of the second buffer layer, the outer end portion of the second buffer layer being located in a position different from a position right above the outer end portion of the first buffer layer.