Preparation method of array substrate, array substrate, display panel and display device

Abstract

The invention discloses a preparation method of an array substrate, an array substrate, a display panel, and a display device. The array substrate includes a plurality of pixel units, and the pixel units include first-type pixel units and second-type pixel units alternately arranged along the row direction. The type pixel unit and the second type pixel unit include a first sub-pixel unit, a second sub-pixel unit and a third sub-pixel unit, and the adjacent first type pixel units and the second type pixel units sequentially arranged along the row direction A sub-pixel unit is adjacently arranged, and the method includes: using a first mask to form a first functional layer; using a second mask to form a first sub-pixel unit and a second sub-pixel unit on the first functional layer. Two functional layers; using a third mask to form a third functional layer in the first sub-pixel unit on the first functional layer; using a fourth mask to form a fourth functional layer covering all pixel units. The invention reduces the processing precision of the precision evaporation mask plate and reduces the process cost.

Description

technical field [0001] Embodiments of the present invention belong to the field of display technology, and relate to a method for preparing an array substrate, an array substrate, a display panel, and a display device. Background technique [0002] The technologies for realizing the colorization of Organic Light-Emitting Diode (OLED) include two mainstream technologies, that is, micro-cavity effect RGB pixel independent light-emitting technology, and white light-emitting materials combined with color filter layer technology. [0003] Among them, the independent light emission of microcavity effect RGB pixels requires the use of precision evaporation mask and pixel alignment technology to prepare the red, green and blue three primary color light emitting centers of microcavity effect, and realize colorization, which often requires the use of multiple pieces of precision evaporation It is difficult to ensure the positioning accuracy of sub-pixels by using a precision evaporati...

AI Technical Summary

Problems solved by technology

[0003] Among them, the independent light emission of microcavity effect RGB pixels requires the use of precision evaporation mask board and pixel alignment technology to prepare the red, green and blue three primary color light emitting centers of microcavity effect to achieve colorization, which often requires the use of multiple pieces of precision evaporation mask, and the method of using a precision evaporation mask is difficult to ensure the positioning accuracy of the sub-pixels, and it is difficult to achieve a display panel with high pixel density. Moreover, the precision evaporation mask is expensive, which will lead to an increase in cost

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