Display panel and display device

Abstract

Embodiments of the present invention provide a display panel and a display device, which relate to the field of display technology and reduce the risk of chamfering or detachment of extraction structures. The display panel includes: a base substrate; an anode; a pixel definition layer, the pixel definition layer has a first opening, and the anode overlaps the first opening; a light-emitting layer located in the first opening; a cathode; located on the side of the cathode facing away from the substrate The light extraction layer includes an extraction structure and a plurality of epitaxial structures arranged on the same layer; the extraction structure overlaps with the pixel definition layer, the epitaxial structure and the extraction structure are arranged in communication, and extend along a direction away from the epitaxial structure, and the epitaxial structure The lower surface facing the base substrate is flush with the lower surface of the extraction structure facing the base substrate, and the orthographic projection of the epitaxial structure on the base substrate overlaps with a part of the first opening; the epitaxial structure is perpendicular to the plane where the base substrate is located The film thickness in the direction is smaller than the film thickness of the extraction structure in the direction perpendicular to the plane where the base substrate is located.

Description

【Technical field】 [0001] The present invention relates to the field of display technology, and in particular, to a display panel and a display device. 【Background technique】 [0002] The organic electroluminescence diode (Organic Electroluminescence Display, OLED) display panel has been widely used due to its excellent characteristics such as high brightness, high efficiency, wide viewing angle, and self-illumination. [0003] In the prior art, panels such as figure 1 The shown light extraction structure 1', the light extraction structure 1' is used to extract the light emitted by the light emitting element 2' to a greater extent, so as to improve the light extraction efficiency of the panel. In order to make the light extraction structure 1' have a better light concentrating effect, a larger angle θ' is usually required between the side wall 3' and the bottom surface 4' of the light extraction structure 1', for example, θ' can be 70 °. However, for such a large angle θ',...

AI Technical Summary

Problems solved by technology

However, for such a large included angle θ', in the process of the light extraction structure 1', once the bottom of the light extraction structure 1' is etched, it is easy to appear figure 2 chamfer shown

Alternatively, once the material for forming the film layer above the light extraction structure 1' penetrates from the bottom of the light extraction structure 1', the light extraction structure 1' is prone to warping and then detached from the lower film layer.

[0004] All of the above situations will adversely affect the light extraction effect of the light extraction structure 1', thereby affecting the light extraction efficiency of the panel

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