A display panel, its manufacturing method and display device

Abstract

The present invention provides a display panel, its preparation method and a display device. By dividing the pixel defining layer into a two-layer structure, and the upper surface of the two-layer structure has liquid repellency, the material containing the light-emitting layer is subsequently sprayed by an inkjet printing process. When the ink is used, because the upper surface of the first pixel defining layer has liquid repellency, it blocks the climbing of the ink drop to the second pixel defining layer, reduces the climbing height of the ink drop, and makes the film thickness of the formed luminescent layer more uniform; Because the remaining part of the second pixel defining layer except the upper surface has lyophilicity, ink droplets comprising the material of the light emitting layer will remain on the side of the second pixel defining layer close to the light emitting layer, because the upper surface of the first pixel defining layer has a Liquid repellency, which inhibits the climbing of the light-emitting layer before drying and forming a film, and ensures the uniformity of the film interface; at the same time, the light-emitting film remaining on the side wall of the second pixel boundary layer is physically disconnected from the light-emitting layer, ensuring that the remaining The film layer on the sidewall of the second pixel defining layer will not affect the luminous characteristics of the panel.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a display panel, a preparation method thereof and a display device. Background technique [0002] Compared with Liquid Crystal Display (LCD), organic electroluminescent display panel (Organic Electroluminescent Display, OLED) has the advantages of self-illumination, fast response, wide viewing angle, high brightness, bright color, light and thin, etc. One of the hot spots in the field is considered to be the next generation of display technology. [0003] At present, the film-forming methods of the light-emitting layer in the OLED display mainly include evaporation and inkjet printing. Film formation by vapor deposition is relatively mature in the preparation of small-size OLED displays, and film formation by inkjet printing is considered to be the best choice for large-size OLEDs due to its fast film formation rate, high material utilization rate, and large-scale realization. ...

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a display panel and a preparation method thereof, which are used to solve the problem in the prior art that the display effect of the display panel is affected by the uneven film thickness of the light-emitting layer formed due to the climbing of ink droplets

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