Display panel and manufacturing method thereof

Abstract

The invention discloses a display panel and a manufacturing method thereof. The display panel comprises a plurality of pixel unit areas which are arranged in an array mode in the first direction and the second direction, and the first direction is different from the second direction. The display panel further comprises a substrate, a pixel definition layer and an organic light-emitting layer. The pixel definition layer is arranged on the substrate and comprises a first retaining wall, and the first retaining wall is arranged around each pixel unit area; the organic light-emitting layer is arranged on the pixel definition layer and comprises a plurality of light-emitting pixels, at least two light-emitting pixels arranged in the second direction are arranged in each pixel unit area, and the distance from one end, away from the substrate, of the first retaining wall to the substrate is larger than the distance from one end, away from the substrate, of each light-emitting pixel to the substrate. The light emitting colors of all the light emitting pixels in the same pixel unit area are the same. According to the invention, the film forming uniformity and the yield of light-emitting pixels can be improved.

Description

technical field [0001] The present invention relates to the field of display technology, and in particular, to a display panel and a manufacturing method thereof. Background technique [0002] In recent years, organic light-emitting diode (Organic Light-Emitting Diode, OLED) displays have become a very popular emerging flat panel display products at home and abroad, because OLED displays have self-illumination, wide viewing angle, short response time, high luminous efficiency, and wide color gamut. , low operating voltage, thin thickness, large size and flexible display and simple process characteristics, and it also has the potential of low cost. [0003] At present, in the preparation process of OLED display, the preparation of pixels is often carried out by inkjet printing process, such as Line bank type printing process and Side by side type printing process. For Line bank type printing process, please refer to figure 1 , which includes a plurality of sub-pixel regions ...

AI Technical Summary

Problems solved by technology

[0003] At present, in the preparation process of OLED displays, inkjet printing process is often used to prepare pixels, such as Line bank printing process and Side by side printing process. For Line bank printing process, please refer to figure 1 , which includes a plurality of sub-pixel regions 1, a plurality of retaining walls 2 arranged vertically, and a plurality of retaining walls 3 arranged in a horizontal direction, and the height of the retaining walls 3 is greater than the height of the retaining walls 1, and then during the printing process, the ink can be The longitudinal retaining walls 2 are spaced apart, and flow can be carried out in multiple sub-pixel regions 1 and retaining walls 3 in the longitudinal direction, which can improve the uniformity of film formation, but when color mixing is caused by inkjet fluctuations, it will make the longitudinal multiple sub-pixel regions 1 Color mixing occurs; in the Side by side printing process, please refer to figure 2 , which includes a plurality of sub-pixel regions 4 and retaining walls 5 surrounding each sub-pixel region 4, which can confine ink to each sub-pixel region 4 for film formation, and then when color mixing occurs, generally only a single sub-pixel region 4 is affected, However, due to the small area of ​​the sub-pixel area 4, the accuracy of inkjet printing is high, and the flow area of ​​the ink in the sub-pixel area 4 is small, and uneven film formation is likely to occur.

[0004] Therefore, it is difficult for the prior art to improve the yield rate of inkjet printing on the basis of ensuring the uniformity of film formation.

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