Display panel and display device

Abstract

The embodiment of the invention provides a display panel and a display device, relates to the technical field of display, and aims to reduce the risk of chamfering or separation of an extraction structure. The display panel comprises: a substrate; an anode; a pixel definition layer provided with a first opening, wherein the anode is overlapped with the first opening; a light-emitting layer located in the first opening; a cathode; and a light extraction layer located on one side, opposite to the substrate, of the cathode and comprising an extraction structure and a plurality of epitaxial structures which are arranged on the same layer, wherein the extraction structure is overlapped with the pixel definition layer, the epitaxial structures are communicated with the extraction structure and extend in the direction away from the epitaxial structure, the lower surface, facing the substrate, of each epitaxial structure is flush with the lower surface, facing the substrate, of the extraction structure, and the orthographic projection, on the substrate, of the epitaxial structure is overlapped with a partial region of the first opening; and the film thickness of the epitaxial structure in the direction perpendicular to the plane where the substrate is located is smaller than the film thickness of the extraction structure in the direction perpendicular to the plane where the substrate is located.

Description

【Technical field】 [0001] The present invention relates to the field of display technology, in particular to a display panel and a display device. 【Background technique】 [0002] Organic Electroluminescence Display (OLED) display panels have been widely used due to their excellent characteristics such as high brightness, high efficiency, wide viewing angle, and self-luminescence. [0003] In the prior art, there are usually such as figure 1 The light extraction structure 1' shown in the light extraction structure 1' is used to extract the light emitted by the light emitting element 2' to a greater extent and 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 included angle θ', in the process of the l...

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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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