Display panel provided with pixel defining layer and manufacturing method of pixel defining layer

Abstract

The embodiment of the invention provides a display panel provided with a pixel defining layer and a manufacturing method of the pixel defining layer. The display panel provided with the pixel defining layer comprises a substrate, multiple pixel areas distributed on the substrate in a matrix and the pixel defining layer arranged on the substrate. The pixel defining layer comprises multiple openings and a pixel separation body defining the openings in an enclosed mode and limiting the pixel areas, and the slope angle of the upper portion of the side wall, used for limiting the pixel area, of the pixel separation body is larger than the slope angle of the lower portion of the side wall, used for limiting the pixel area, of the pixel separation body.

Description

technical field [0001] Embodiments of the invention relate to a display panel with a pixel defining layer and a manufacturing method of the pixel defining layer. Background technique [0002] Organic electroluminescent displays have the advantages of self-luminescence, fast response, wide viewing angle, high brightness, bright colors, thin and light, etc. Therefore, organic electroluminescent display technology has become an important display technology. [0003] At present, the methods for forming the organic electroluminescent layer of the organic electroluminescent display include: 1. The evaporation process is adopted. This method is suitable for small organic molecules. It is characterized in that the formation of the organic electroluminescent layer does not require a solvent, and the film thickness is uniform. However, the equipment investment is large, the material utilization rate is low, and it is not suitable for the production of large-scale products; 2. The solu...

AI Technical Summary

Problems solved by technology

However, due to the difference in surface energy between the ink drop and the pixel defining layer 20, the large slope angle of the PDL, and the drying behavior of the ink drop itself, it is easy to form an uneven film with thin edges and thick middle after the ink drop dries, especially in the The film thickness varies greatly at the edge of the pixel area, as figure 1 The area A circled by the dotted line in the center is shown

As a result, the resulting structure will result in pinholes (Pinholes) at the edges of the pixel area and leakage

And, for figure 1 In the pixel defining layer shown, the area B of the light-emitting layer 30 used to emit light is approximately equal to the area of ​​the entire pixel area 40. Since the thickness of the light-emitting layer in the light-emitting area B is not uniform, this will lead to uneven brightness in the pixel area.

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