Organic electroluminescence display device

Abstract

The organic electroluminescence display device has a circuit board, an element layer which contains an organic electroluminescence film and a positive electrode and a negative electrode sandwiching the organic electroluminescence film and which is formed on the circuit board, and a sealing film sealing the element layer. The sealing film contains an inorganic layer covering the element layer and an organic layer formed between a part of the element layer and a part of the inorganic layer. The upper surface of the element layer has an inorganic contact area contacting the inorganic layer and an organic contact area contacting the organic layer. The organic contact area is a hollow in the upper surface of the element layer. The area of the upper surface of the organic layer is smaller than the area of the lower surface contacting the inner surface of the hollow.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]The present application claims priority from Japanese application JP2013-251216 filed on Dec. 4, 2013, the content of which is hereby incorporated by reference into this application.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to an organic electroluminescence display device.[0004]2. Description of the Related Art[0005]Organic electroluminescence display apparatuses require a sealed structure for isolating the organic EL (Electro-Luminescence) film such as the light-emitting layer from the air. For example, a structure in which a multilayer sealing film containing an organic film of a resin sandwiched between inorganic films is used for sealing the organic EL film is known (Japanese Patent No. 4303591).[0006]Although a high barrier property can be obtained with a structure in which the sealing film has an organic film, there has been a problem in that light is easily refracted at the boundar...

AI Technical Summary

Benefits of technology

This patent relates to a sealing film used in organic electroluminescence display devices. The sealing film is designed to prevent the refraction of light and the spread of water. The film contains an inorganic layer and an organic layer, with the organic layer filling a hollow in the element layer. This results in a smooth surface and a high barrier property. The inorganic layer is formed on a surface with less unevenness and prevents light refraction, while the organic layer prevents water spread. The technical effect of this design is to improve the performance and durability of organic electroluminescence display devices.

Problems solved by technology

Although a high barrier property can be obtained with a structure in which the sealing film has an organic film, there has been a problem in that light is easily refracted at the boundary surface between the organic film and an inorganic film because the refractive indexes of these films are significantly different.

In addition, when an organic film, which easily absorbs water, is continuously provided, there has been a problem in that water easily permeates and spreads.

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